CN102056236A - Communication network implemented based on Wimax network structure and terminal access method - Google Patents

Abstract

The invention discloses a communication network and a terminal access method based on the Wimax network architecture, including an access service network and a connection service network in the Wimax network architecture. The access service network includes a base station and an access gateway. The connection service The network includes ILCR, and the communication network also includes a packet data network. The access gateway is used to provide access services and control for the terminal, maintain the connection information between the terminal and the communication peer, and cooperate with other access gateways to realize terminal cross-access Gateway and inter-ILCR switching; ILCR is used to maintain the session connection of the terminal, maintain the mapping information between the terminal and the communication peer, and realize the routing and forwarding of data packets. The present invention also provides a method for the terminal to access the communication network. The deployment of the architecture of the present invention takes into account the requirements of being compatible with terminals and upper-layer services, and only needs to upgrade network-side equipment to be compatible with application scenarios where terminals are not changed.

Description

Communication network and terminal access method based on Wimax network architecture

technical field

The invention relates to the technical field of communication, in particular to a communication network realized based on the Wimax network architecture.

Background technique

In the traditional TCP/IP network environment, IP provides the routing function for the Internet (Internet). It assigns logical addresses, that is, IP addresses, to all nodes (including hosts and routers), and each port of each host is assigned an IP address. An IP address includes a network prefix and a host part. The IP addresses of all hosts on the same link usually have the same network prefix but different host parts. This enables IP to perform route selection based on the network prefix part of the IP address of the destination node, so that the router can save a simple network prefix route in order, instead of saving a separate route for each host. In this case, due to the use of network prefix routing, when a node switches from one link to another without changing its IP address, it is impossible for the node to receive data packets on the new link. Therefore, it is impossible to communicate with other nodes.

The existing network technology using the TCP/IP protocol has the following deficiencies:

A fixed anchor point is adopted to support terminal mobility. For example, the GTP protocol is adopted in the LTE network, and the gateway PGW is specified as the mobile anchor point of the terminal; the Mobile IP protocol is adopted in the Wimax network, and the home agent (HA: Home Agent) is used as the anchor. point. The introduction of fixed anchor points brings about the problem of detours in the data packet path, aggravating the transmission delay and bandwidth waste. However, the routing optimization process of MIPV6 requires hosts participating in the communication to support the MIPV6 protocol, which is difficult to deploy.

The IP address has dual functions: it is used as the position identification of the network interface of the communication terminal host at the network layer in the network topology, and as the identity identification of the network interface of the transport layer host. When the IP address of the host changes, not only the route will change, but also the identity of the communication terminal host will change, which will lead to an increasingly heavy routing load, and the change of the host identity will lead to interruption of applications and connections. The prior art identification and location separation frameworks HIP, LISP, etc. are a brand-new network framework constructed to overcome this deficiency of the existing network technology. The host-based HIP protocol requires major changes to the terminal and upper-layer services, making it difficult to deploy; both ends of the communication move at the same time and the location update phase requires the network to participate in the maintenance of the communication link, otherwise, packet loss will occur. Based on the network LISP protocol, mobility and multi-homing are problems that are solved after the separation of identity and location, and there is no specific solution and implementation method yet.

Fig. 1 is the network architecture of the existing Wimax system, as shown in the figure, the Wimax system of the prior art is generally made up of three parts: terminal, Wimax Access Service Network (Wimax Access Service Network, referred to as W-ASN) and Wimax connection service Network (Wimax Connect Service Network, referred to as W-CSN).

The W-ASN mainly performs the following functions: completing the Layer 2 (L2) connection of Wimax terminals, delivering AAA messages to the H-CSN (home CSN), network selection and discovery of NSPs, and providing information for the Layer 3 (L3) connections of Wimax terminals Relay, radio resource management, tunnel maintenance between W-ASN and W-CSN. In the mobile scenario, W-ASN also needs to support the following functions: W-ASN Anchored Mobility Management (W-ASN Anchored MM), W-CSN Anchored Mobility Management (W-CSN Anchored MM), Paging and Idle Mode operation.

W-ASN is also used to manage the IEEE 802.16 air interface to provide wireless access to Wimax end users. W-ASN consists of at least one base station (Base Station, BS for short) and an access gateway (W-ASN Gateway, AGW for short), and can include a single AGW or multiple AGWs. The W-ASN communicates with MS (Mobile Station) at the R1 reference point, communicates with the W-CSN at the R3 reference point, and communicates with another W-ASN at the R4 reference point. The operator who manages W-ASN is called NAP (Network Access Provider, Network Access Provider).

W-CSN is a combination of network functions. W-CSN can be composed of HA (home agent for mobile IP), AAA proxy or server (AAA Proxy/Server), billing server, interconnection gateway equipment, etc. As mentioned above, the operator who manages the W-CSN is called NSP (Network Service Provider, network service operator).

W-CSN mainly provides the following functions: terminal user session connection, terminal IP address allocation, Internet access, AAA proxy or server, terminal user policy and permission control, tunnel maintenance between W-ASN and W-CSN, End user billing and settlement, roaming between W-CSNs, mobility management and Wimax services between W-CSNs.

The existing mobile communication networks using the TCP/IP protocol, including the Wimax system, also have the above-mentioned defects of the existing network technology using the TCP/IP protocol.

In the prior art, there are mainly two solutions for the separation of identification and location, one is based on a host, and the other is based on a router, each of which is supported by a variety of related technologies. In the scheme, the identity identifier (AID) of the terminal user does not change during the moving process, and the location identifier is assigned according to the location of the terminal to realize the routing and forwarding of the data message. However, no corresponding implementation scheme has been proposed for how to implement a communication network with a structure for separating identity and location based on the Wimax system.

Contents of the invention

In view of the above defects in the prior art, the technical problem to be solved by the present invention is to provide a communication network based on the Wimax network architecture, which can realize the separation of identity and location of user terminals based on the network.

Another technical problem to be solved by the present invention is to provide a communication network based on the Wimax network architecture, which can support the application scenario of mobile terminals and effectively solve the problem of circuitous routing in this scenario.

Another technical problem to be solved by the present invention is to provide a communication network based on the Wimax network architecture. In the deployment of this architecture, the requirements of compatible terminals and upper-layer services are considered, and only the network side equipment needs to be upgraded. Application scenarios.

Another technical problem to be solved by the present invention is to provide a communication network based on the Wimax network architecture, which can realize the separation of identity and location when a terminal accesses the communication network.

Another technical problem to be solved by the present invention is to provide a communication network based on the Wimax network architecture, which can realize the separation of identity and location of terminals when communicating in the communication network.

Another technical problem to be solved by the present invention is to provide a communication network based on the Wimax network architecture, which can realize the separation of identity and location of terminals when they are offline in the communication network.

Another technical problem to be solved by the present invention is to provide a communication network based on the Wimax network architecture, which can realize the separation of identity and location of terminals when switching in the communication network.

In order to solve the above problems, the present invention provides a communication network based on the Wimax network architecture to separate the identity (AID) from the location, including the access service network and the connection service network in the Wimax network architecture, the access service network It includes a base station and an access gateway, and it is characterized in that the connection service network includes an identity location core router (ILCR) and an identity location register (ILR). Generalized forwarding plane for data packets between ILCRs, where:

The access gateway is used to provide access service and control for the terminal, maintain the connection information between the terminal and the communication peer, and cooperate with other access gateways to realize the switching of the terminal across the access gateway and across the ILCR;

The ILCR is used to maintain the session connection of the terminal, allocate the RID pointing to the ILCR for the terminal, maintain the AID-RID mapping information between the terminal and the communication peer, query the RID of the terminal to the ILR, realize the routing and forwarding of data messages, and communicate with Other ILCRs cooperate to realize the switching of terminals across ILCRs;

The ILR is used to receive the registration and deregistration requests from the access gateway or ILCR for the user terminal of the ILR, maintain the AID-RID mapping information of the user terminal, and receive the query request for the RID of the terminal, and include the AID of the terminal in the request The corresponding RID is returned to the query requester.

Further, the above-mentioned communication network may also have the following characteristics: the access gateway includes: a connection maintenance module and a data forwarding module, wherein:

The connection maintenance module is used to save the connection information between the terminal and the communication peer, including the corresponding relationship between the terminal AID and the communication peer AID; after learning that the terminal is offline or after the communication with the communication peer is terminated, delete the connection information between the terminal and the communication peer; Delete the connection information between the communication peer and the terminal when it is known that the communication peer is offline or cut out or the communication with the terminal is terminated;

The offline processing module is used to notify the connection maintenance module when it is determined that the connected terminal is offline; and notify the connection maintenance module when it is determined that the communication peer is offline;

The data forwarding module is used for forwarding data packets between the base station and the ILCR.

Further, the above-mentioned communication network may also have the following characteristics:

The offline processing module in the access gateway is further configured to notify the access gateway accessed by the communication peer that the terminal is offline when it is determined that the accessed terminal is offline, and when receiving the terminal When offline notification, determine that the terminal as the communication peer is offline;

The offline processing module in the access gateway finds the AIDs of all communication peers of the terminal according to the connection information stored in the connection maintenance module, and inquires locally or to the AAA server where the communication peers belong according to the AIDs of the communication peers The access gateway to the communication peer.

Further, the above-mentioned communication network may also have the following characteristics: the ILCR includes a tunnel establishment module, a mapping management module and a message forwarding module, wherein:

The tunnel establishment module is used to establish a tunnel between the access gateway and the ILCR, assign a RID to the terminal, and send the terminal's AID and the RID to the mapping management module;

The mapping management module is used to cache and maintain the AID-RID mapping information of the terminal and the communication peer;

The message forwarding module is used to query the ILR from the mapping management module or the communication peer's home after receiving the uplink data message that the terminal and the communication peer do not belong to the same ILCR (that is, they are not connected to the same ILCR). The RID of the communication peer and the RID of the terminal are encapsulated together in a data message containing the terminal AID and the AID of the communication peer, routed by the generalized forwarding plane and forwarded to the peer ILCR; and the downlink data message sent by the generalized forwarding plane Decapsulate, strip off the RID and send it to the terminal.

Further, the above-mentioned communication network may also have the following characteristics:

It also includes a registration and deregistration module, which is used to request the terminal's home ILR to register the terminal's RID after receiving the terminal's AID and the RID assigned to the terminal, and carry the terminal's AID and RID; after learning that the terminal is offline, request the terminal's belonging The local ILR cancels the RID of the terminal;

The registration and deregistration module is located in the access gateway, and the tunnel establishment module in the ILCR also sends the AID of the terminal and the RID assigned to the terminal to the registration and deregistration module of the access gateway; or, the registration and deregistration module is located in the ILCR , the tunnel establishment module in the ILCR also sends the AID of the terminal and the RID assigned to the terminal to the registration deregistration module of the ILCR.

Further, the above-mentioned communication network may also have the following characteristics:

The ILCR also includes an offline processing module, which is used to notify the mapping management module when it is determined that the connected terminal is offline; when it is determined that the communication peer is offline, notify the mapping management module;

The mapping management module in the ILCR is also used to delete the AID-RID mapping information of the terminal when it is known that the terminal is offline or switched out, and delete the communications between the terminal communication peers that have no communication relationship with other terminals accessing the ILCR The AID-RID mapping information of the opposite end; after learning that the communication between the terminal and the communication end has terminated, and the communication end has no communication relationship with other terminals accessing the ILCR, delete the AID-RID mapping information of the communication end; knowing the communication end When the terminal is offline or the communication with the terminal is terminated, the AID-RID information of the communication peer is deleted.

Further, the above-mentioned communication network may also have the following characteristics: the message forwarding module includes a first forwarding unit and a second forwarding unit, wherein:

The first forwarding unit is configured to, after receiving an uplink data message from the base station that includes the terminal AID and the communication peer AID and that the terminal and the communication peer do not belong to the same ILCR, if the mapping management module queries the RID of the communication peer, Encapsulate the RID of the terminal and the communication peer as the source and destination addresses in the data message, route through the generalized forwarding plane and forward it to the peer ILCR; if the RID of the communication peer cannot be found, query the communication at the ILR of the communication peer The RID of the opposite end, the AID-RID of the opposite end of the communication searched is saved to the mapping management module;

The second forwarding unit is used to decapsulate the received downlink data message sent by the generalized forwarding plane, strip the RID therein, and send it to the terminal through the connection between the ILCR and the terminal; and determine the data message in the data message Whether the AID-RID mapping information of the communication peer exists in the mapping management module, if not, it is saved in the mapping management module.

Further, the above-mentioned communication network may also have the following characteristics:

The connection service network also includes a packet forwarding function (PTF); after the first forwarding unit receives the uplink data message sent by the base station, if the RID of the communication peer cannot be found in the mapping management module, the RID of the terminal is used as The source address is encapsulated in the data message and forwarded to the PTF; the PTF is used to find the corresponding RID as the destination address according to the AID of the communication peer in the data message after receiving the data message delivered by ILCR or other PTFs After being encapsulated in the message header, send the data message to the peer ILCR through the generalized forwarding plane; or

After the first forwarding unit receives the uplink data message sent by the base station, if the mapping management module cannot query the RID of the communication peer, it first caches the data message, and after the RID of the communication peer is found, the The RIDs of the terminal and the communication peer are encapsulated in the data message as the source and destination addresses, routed through the generalized forwarding plane and forwarded to the peer ILCR.

Further, the above-mentioned communication network may also have the following characteristics:

The access gateway also includes a handover module and an anchor data path function (DPF) module, the handover module is used for handover triggered by the terminal moving to another anchor DPF module or ILCR service area when there is a communication peer control, including:

The cut-out unit is used to control the cut-out of the terminal, notify the ILCR of the terminal switch, send the connection information of the terminal and the communication peer saved by the connection maintenance module to the cut-in access gateway, and send the information received during the switch to the The data message of the terminal is forwarded to the cut-in access gateway, and the terminal notifies the connection maintenance module after switching out;

The cut-in unit is used to control the cut-in of the terminal, and save the connection information between the terminal and the communication peer sent by the cut-out access gateway to the connection maintenance module;

The connection maintenance module is further configured to delete the connection information between the terminal and the communication peer after learning that the terminal is switched out.

Further, the above-mentioned communication network may also have the following characteristics:

The ILCR also includes a handover control module, which is used to control the handover triggered by the terminal moving to another ILCR service area when there is a communication peer, including:

The switch-out control unit is used to control the switch-out of the terminal, and sends a switch request to the switch-in ILCR where the terminal moves, and forwards the data message sent to the terminal received during the switch to the switch-in ILCR, after the terminal switches out notification mapping management module;

The cut-in control unit is used to control the cut-in of the terminal, distribute the RID pointing to the ILCR for the terminal and send the AID and the RID of the terminal to the mapping management module, or to the mapping management module and the access gateway; The terminal ILCR sends a terminal RID update notification, carrying the terminal's AID-RID mapping information;

The mapping management module manages the communication peers of all terminals connected to the ILCR together, and updates the locally stored AID-RID mapping information of the terminal after receiving the terminal RID update notification from the peer.

Further, the above-mentioned communication network may also have the following characteristics:

When the cut-in control unit sends a terminal RID update notification to the opposite end ILCR, it first finds the AIDs of all communication peers of the terminal according to the AID of the terminal to the connection maintenance module of the access gateway, and then finds the AIDs of the communication peers in the mapping management module. The RID of the opposite end sends a terminal RID update notification to the opposite end ILCR according to the found RID; or

The cut-in control unit of the ILCR is also used to send the terminal RID update notification to the access gateway on the same side, and the cut-in unit of the access gateway is also used to send the terminal RID update notification to the peer access gateway, and receives The terminal RID update notification sent by the peer access gateway is forwarded to the ILCR.

Further, the above-mentioned communication network may also have the following characteristics:

After the data forwarding module in the access gateway receives the data message, it judges whether the corresponding relationship between the terminal AID and the communication peer AID in the data message has been saved in the connection maintenance module, and if it is not saved, it will be added to the connection maintenance module ;or

After the message forwarding module in the ILCR receives the data message, it judges whether the corresponding relationship between the terminal AID and the communication peer AID in the data message has been saved in the connection maintenance module, and if not saved, it will be sent to the connection of the access gateway. Maintenance module save.

Further, the above-mentioned communication network may also have the following characteristics:

The ILR saves or updates the AID-RID mapping information of the terminal after receiving the registration request for the home user terminal, and deletes or invalidates the AID-RID mapping information of the terminal after receiving the logout request for the home user terminal ; If a registration or deregistration request for a non-attributed user terminal is received, it is forwarded to the ILR at the terminal's home location for processing.

Further, the above-mentioned communication network may also have the following characteristics:

The ILCR is obtained by integrating the functions of the home agent and/or core router in the Wimax network architecture, and expanding the new functions required to realize the separation of identity and location; the connection service network also includes the Wimax network architecture for Original network elements for authentication, authorization and accounting;

The access gateway is obtained by expanding the new functional modules required to realize the separation of identity and location on the basis of the functional entity of the access gateway in the Wimax network architecture. The access gateway in the Wimax network architecture The functional entities include an anchor data path function (DPF) module and an authenticator.

Further, the above-mentioned communication network may also have the following characteristics:

The tunnel establishment module in the ILCR adopts a dynamic tunnel establishment method, and establishes a terminal-based tunnel in the tunnel between the access gateway and the ILCR during the terminal access process.

In order to solve the above-mentioned technical problems, the present invention provides a second communication network based on the Wimax network architecture to separate the identity (AID) from the location, including the access service network and the connection service network in the Wimax network architecture. The access service network includes a base station and an access gateway, wherein the connection service network includes an identity location core router (ILCR) and an identity location register (ILR), and the communication network also includes a location identification (RID) A generalized forwarding plane for routing and forwarding data packets between ILCRs, where:

The ILCR is used to assign a RID pointing to this ILCR for the terminal, register, cancel and query the RID of the terminal at the ILR at the terminal's home location, maintain the connection information between the terminal and the communication peer, maintain the session connection of the terminal, and maintain the AID of the terminal and the communication peer -RID mapping information, realize the routing and forwarding of data packets, and cooperate with other ILCRs to realize the switching of terminals across ILCRs;

The ILR is used to receive the registration and deregistration request of the user terminal belonging to the ILR, maintain the AID-RID mapping information of the user terminal, and receive the query request for the terminal RID, and return the RID corresponding to the terminal AID in the request to the query request square.

Further, the above-mentioned communication network may also have the following characteristics: the ILCR includes a tunnel establishment module, a registration and deregistration module, a mapping management module and a message forwarding module:

The tunnel establishment module is used to establish a tunnel between the access gateway and the ILCR, assign a RID to the terminal, and send the AID and the RID of the terminal to the mapping management module and the registration deregistration module;

The registration and deregistration module is used to request the terminal's home ILR to register the terminal's RID after receiving the terminal's AID and the RID assigned to the terminal, and to carry the terminal's AID and RID; after learning that the terminal is offline, request the terminal's home The local ILR cancels the RID of the terminal;

The mapping management module is used to cache and maintain the AID-RID mapping information of the terminal and the communication peer;

The message forwarding module is configured to receive the RID of the communication peer and the RID of the terminal that are queried from the mapping management module or the home ILR of the communication peer after receiving an uplink data message that the terminal and the communication peer do not belong to the same ILCR Encapsulate together in a data message containing the AID of the terminal and the AID of the communication peer, route through the generalized forwarding plane and forward to the peer ILCR; and decapsulate the downlink data message, strip the RID from it, and send it to the terminal.

Further, the above communication network may also have the following characteristics: the ILCR also includes a connection maintenance module, an offline processing module and a mapping management module, wherein:

The connection maintenance module is used to save the connection information between the terminal and the communication peer; delete the connection information between the terminal and the communication peer after learning that the terminal is offline or removed, or after the communication with the communication peer is terminated; knowing that the communication peer is offline or communicating with the terminal After termination, delete the connection information between the communication peer and the terminal;

The offline processing module is used to notify the registration cancellation module, the mapping management module and the connection maintenance module when it is determined that the connected terminal is offline; when it is determined that the communication peer is offline, notify the mapping management module and the connection maintenance module;

The mapping management module is also used to delete the AID-RID mapping information of the terminal when it is known that the terminal is switched out or offline, and delete the AIDs of the communication peers of the terminal that have no communication relationship with other terminals that access the ILCR -RID mapping information; after learning that the communication between the terminal and the communication peer has terminated, and the communication peer has no communication relationship with other terminals accessing the ILCR, delete the AID-RID mapping information of the communication peer; knowing that the communication peer is offline or When the communication with the terminal is terminated, the AID-RID information of the communication peer is deleted.

Further, the above-mentioned communication network may also have the following characteristics:

When the offline processing module determines that the communication counterparts are offline, they also search for the AIDs of all communication counterparts of the terminal according to the terminal AID in the connection maintenance module, and then query the mapping management module for the RIDs of all communication counterparts, and then report to the counterpart ILCR Send terminal offline notification;

The offline processing module determines that the terminal as the communication peer is offline after receiving the terminal offline notification from the peer ILCR.

Further, the above-mentioned communication network may also have the following characteristics: the message forwarding module includes a first forwarding unit and a second forwarding unit, wherein:

The first forwarding unit is used to, after receiving the uplink data message sent by the access gateway that includes the terminal AID and the communication peer AID and the terminal and the communication peer do not belong to the same ILCR, if the mapping management module queries the communication pair The RID of the terminal, the RID of the terminal and the communication peer as the source and destination addresses are encapsulated in the data message, routed through the generalized forwarding plane and forwarded to the peer ILCR; if the RID of the communication peer cannot be found, go to the communication peer The ILR queries the RID of the communication peer;

The second forwarding unit is used for decapsulating the received downlink data message from the generalized forwarding plane, stripping off the RID, and sending it to the terminal through the connection between the ILCR and the terminal.

Further, the above-mentioned communication network may also have the following characteristics:

The connection service network also includes a packet forwarding function (PTF); after the first forwarding unit receives the uplink data message from the base station that the terminal and the communication peer do not belong to the same ILCR, if the mapping management module cannot query the The RID of the communication peer encapsulates the RID of the terminal as the source address in the data message, and forwards it to the PTF at which the communication peer belongs; the PTF is used to send the data message according to the In the data message, the AID of the communication peer end finds the corresponding RID as the destination address and encapsulates it in the message header, and sends the data message to the peer ILCR through the generalized forwarding plane; or

After the first forwarding unit receives the uplink data message from the base station that the terminal and the communication peer do not belong to the same ILCR, if the RID of the communication peer cannot be found in the mapping management module, first cache the data message, and then After querying the RID of the communication peer, the terminal and the RID of the communication peer are used as the source and destination addresses and encapsulated in the data message, routed through the generalized forwarding plane and forwarded to the peer ILCR.

Further, the above-mentioned communication network may also have the following characteristics:

The first forwarding unit is further configured to save the queried AID-RID mapping information of the communication peer to the mapping management module;

After the second forwarding unit receives the downlink data message sent by the generalized forwarding plane, it also judges whether the AID-RID mapping information of the communication peer in the data message exists in the mapping management module, and if it does not exist, save it to In the mapping management module;

The first forwarding unit and the second forwarding unit also judge whether the corresponding relationship between the terminal AID and the communication peer AID in the received data message has been saved in the connection maintenance module, if not, it is saved in the connection maintenance module.

Further, the above-mentioned communication network may also have the following characteristics: it also includes a switching control module, and the switching control module further includes a switch-out control unit and a switch-in control unit, wherein:

The switch-out control unit is used to control the switch-out of the terminal. When the terminal moves, determine the switch-in ILCR to which the terminal will move according to the destination of the move, and notify the mapping management module and the connection maintenance module after the movement is completed. , the data message sent to the terminal received during the handover is forwarded to the cut-in ILCR;

The cut-in control unit is used to control the cut-in of the terminal. When the terminal moves from another ILCR to the service area of the ILCR, the terminal is assigned a RID pointing to the ILCR, and the AID and the RID of the terminal are sent to the registry Log out of the module and save it to the mapping management module;

Further, the above-mentioned communication network may also have the following characteristics:

The cut-in control unit is also used to inquire about the location information of the opposite end ILCR, and send a terminal RID update notification to the opposite end ILCR, carrying the AID-RID mapping information of the terminal; when inquiring, first go to the terminal saved by the connection maintenance module according to the terminal AID Find the AIDs of all communication peers in the connection information with the communication peers, and then use the found AIDs to find the corresponding RIDs in the AID-RID mapping information of the communication peers saved by the mapping management module, and the found RIDs are the peers ILCR location information;

The mapping management module manages the communication peers of all terminals connected to the ILCR together, and updates the locally stored AID-RID mapping information of the terminal after receiving the terminal RID update notification from the peer.

Further, the above-mentioned communication network may also have the following characteristics:

The ILR saves or updates the AID-RID mapping information of the terminal after receiving the registration request for the home user terminal, and deletes or invalidates the AID-RID mapping information of the terminal after receiving the logout request for the home user terminal ; If a registration or deregistration request for a non-attributed user terminal is received, it is forwarded to the ILR at the terminal's home location for processing.

Further, the above-mentioned communication network may also have the following characteristics:

The ILCR is obtained by integrating the functions of the home agent and/or core router in the Wimax network architecture, and expanding the new functions required to realize the separation of identity and location; the connection service network also includes the Wimax network architecture for Original network elements for authentication, authorization and accounting;

In order to solve the above-mentioned technical problems, the present invention provides a third communication network based on the Wimax network architecture to separate the identity (AID) from the location, including the access service network and the connection service network in the Wimax network architecture. The inbound service network includes a base station and an access gateway, wherein the connection service network includes an identity location register (ILR), and the communication network also includes a generalized device for routing and forwarding data packets according to a location identifier (RID). Forwarding plane, where:

The access gateway is used to provide access service and control for the terminal, allocate RID for the terminal, register, cancel and query the RID of the terminal to the ILR where the terminal belongs, maintain the connection information between the terminal and the communication peer, and maintain the connection information between the terminal and the communication peer. AID-RID mapping information, realize the routing and forwarding of data packets, and cooperate with other access gateways to realize the switching of terminals across access gateways;

The ILR is used to receive the registration and deregistration request of the user terminal belonging to the ILR, maintain the AID-RID mapping information of the user terminal, and receive the query request for the terminal RID, and return the RID corresponding to the terminal AID in the request to the query request square.

Further, the above-mentioned communication network may also have the following characteristics: the access gateway includes a RID allocation module, a registration and deregistration module, a mapping management module and a data forwarding module, wherein:

The RID allocation module is used to allocate a RID to the terminal during the process of terminal request access or terminal cut-in, and send the RID and the AID of the terminal to the mapping management module and the registration deregistration module;

The registration and deregistration module is used to register the terminal RID at the terminal's home ILR after receiving the terminal AID and the RID allocated for the terminal, and carry the terminal's AID and RID; after learning that the terminal is offline, request the terminal to belong to The local ILR cancels the RID of the terminal;

The mapping management module is used to cache and maintain the AID-RID mapping information of the terminal and the communication peer;

The data forwarding module is configured to query the RID of the communication peer from the mapping management module or the corresponding ILR of the communication peer when the terminal and the communication peer do not belong to the same ILCR after receiving the uplink data message Encapsulate in a data packet containing the AID of the terminal and the AID of the communication peer, forward it to the ILCR with which the tunnel is established; and decapsulate the downlink data packet and send it to the terminal.

Further, the above-mentioned communication network may also have the following characteristics: the access gateway further includes a connection maintenance module and an offline processing module, wherein:

The connection maintenance module is used to save the connection information between the terminal and the communication peer; delete the connection information between the terminal and the communication peer after learning that the terminal is offline or removed, or after the communication with the communication peer is terminated; knowing that the communication peer is offline or communicating with the terminal After termination, delete the connection information between the communication peer and the terminal;

The offline processing module is used to notify the registration and deregistration module, the connection maintenance module and the mapping management module after determining that the terminal connected to the access gateway is offline; when it is determined that the communication peer is offline, notify the connection maintenance module and the mapping management module ;

The mapping management module deletes the AID-RID mapping information of the terminal when it learns that the terminal is switched out or is offline, and deletes the AID-RID mapping information of the communication peers of the terminal that have no communication relationship with other terminals accessing the access gateway. RID mapping information; after learning that the communication between the terminal and the communication peer is terminated, and the communication peer has no communication relationship with other terminals accessing the ILCR, delete the AID-RID mapping information of the communication peer; knowing that the communication peer is offline or connected to the ILCR When the terminal communication is terminated, the AID-RID information of the communication peer is deleted.

Further, the above-mentioned communication network may also have the following characteristics:

The RID allocation module assigns the RID to the terminal to point to the access gateway; when the offline processing module determines that the communication peer is offline, it also searches for the AIDs of all communication peers of the terminal in the connection maintenance module according to the terminal AID, and then goes to the mapping management The module queries the RIDs of all communication peers, and then sends a terminal offline notification to the peer access gateway, carrying the terminal’s AID; and after receiving the terminal offline notification sent by the peer access gateway, determines the communication peer the terminal is offline; or

The RID allocation module assigns the RID to the terminal and points to the ILCR; when the offline processing module determines that the communication counterpart is offline, it also finds the AIDs of all communication counterparts of the terminal in the connection maintenance module according to the terminal AID, and then from the local or communication counterpart The AAA home server queries the location information of the peer access gateway, and then sends a terminal offline notification to the peer access gateway, carrying the terminal's AID; and after receiving the terminal offline notification from the peer access gateway, It is determined that the terminal serving as the communication peer is offline.

Further, the above-mentioned communication network may also have the following characteristics:

The access gateway also includes a switching module, which is used to control the switching triggered when the terminal moves to another access gateway service area, including:

The cut-out unit is used to realize the cut-out of the terminal. During the handover, the data message sent to the terminal received during the handover is forwarded to the cut-in access gateway. After the handover is completed, the connection maintenance module is notified. A change in the ILCR is also notified to the mapping management module. Optionally, sending the connection information between the terminal and the communication peer and/or the AID-RID mapping information of the terminal communication peer to the cut-in access gateway for storage;

The cut-in unit is used to realize the cut-in of the terminal. If the switch causes the access gateway or ILCR pointed to by the terminal RID to change, a new RID is assigned to the terminal, and the new AID-RID mapping information of the terminal is saved to the mapping management module, and the terminal The AID and the newly assigned RID are sent to the registration deregistration module.

Further, the above-mentioned communication network may also have the following characteristics:

The access service network has a data plane interface with the generalized forwarding plane; the data forwarding module includes:

The first forwarding unit is configured to receive an uplink data message from the base station that includes the terminal AID and the communication counterpart AID, and the terminal and the communication counterpart do not belong to the same ILCR, such as querying the communication counterpart in the mapping management module RID, encapsulate the RID of the terminal and the communication peer as the source and destination addresses in the data message and send it to the generalized forwarding plane; if the RID of the communication peer cannot be found, go to the ILR of the communication peer to inquire about the RID of the communication peer;

The second forwarding unit is configured to decapsulate the downlink data message sent by the generalized forwarding plane, strip off the RID, and send it to the terminal through the connection between the access gateway and the terminal.

Further, the above-mentioned communication network may also have the following characteristics:

The connection service network includes an identity location core router (ILCR), which is used to maintain the session connection of the terminal, establish a tunnel between the access gateway and the ILCR, and forward the data in RID format between the generalized forwarding plane and the access gateway. Data packets with source and destination addresses;

The RID allocation module of the access gateway points to the access gateway for the RID allocated by the terminal; the data forwarding module includes:

The first forwarding unit is configured to, after receiving the uplink data message sent by the base station that includes the terminal AID and the communication peer AID, and the terminal and the communication peer do not belong to the same ILCR, such as querying the communication pair in the mapping management module For the RID of the communication peer, encapsulate the RID of the terminal and the communication peer as the source and destination addresses in the data message, and forward it to ILCR after tunnel encapsulation; end RID;

The second forwarding unit is used to decapsulate the downlink data message sent by the ILCR, strip off the RID and tunnel encapsulation, and send it to the terminal through the connection between the access gateway and the terminal.

Further, the above-mentioned communication network may also have the following characteristics:

A terminal-based dynamic tunnel is established between the access gateway (AGW) and the ILCR; or

A static tunnel is established between the access gateway (AGW) and the ILCR, and the ILCR is also used to cache and maintain the AGW-AID-RID mapping information of the terminal after the tunnel between the access gateway and the ILCR is established, and After the terminal moves to the service area of another ILCR, the AGW-AID-RID mapping information of the terminal is deleted.

Further, the above-mentioned communication network may also have the following characteristics:

The connection service network includes an identity location core router (ILCR), which is used to maintain the session connection of the terminal, establish a tunnel between the access gateway and the ILCR, and forward the data in RID format between the generalized forwarding plane and the access gateway. Data packets with source and destination addresses;

The RID assignment module of the access gateway points to the ILCR that establishes a tunnel with the access gateway for the RID assigned by the terminal; the data forwarding module includes:

The first forwarding unit is configured to receive an uplink data message from the base station that includes the terminal AID and the communication counterpart AID, and the terminal and the communication counterpart do not belong to the same ILCR, such as querying the communication counterpart in the mapping management module RID, use the terminal RID or the address of the access gateway as the source address, encapsulate the RID of the communication peer as the destination address in the data packet, and forward it to ILCR after tunnel encapsulation; if the RID of the communication peer cannot be found, go to the communication The ILR at the peer end queries the RID of the communication peer end;

The second forwarding unit is used to decapsulate the downlink data message sent by the ILCR, strip the RID and tunnel encapsulation, or strip the RID, access gateway address and tunnel encapsulation, or strip the tunnel encapsulation Afterwards, it is sent to the terminal through the connection between the access gateway and the terminal.

Further, the above-mentioned communication network may also have the following characteristics:

A terminal-based dynamic tunnel is established between the access gateway (AGW) and the ILCR; or

A static tunnel is established between the access gateway (AGW) and the ILCR, the ILCR includes a message forwarding module, and the message forwarding module further includes:

The first forwarding unit is configured to query the AGW-AID-RID mapping information in the local cache according to the source AID after receiving the uplink data message sent by the access gateway that the terminal and the communication peer do not belong to the same ILCR, and use it as The access gateway address of the source address is replaced with the terminal RID and the tunnel encapsulation is stripped off before being forwarded to the mapping forwarding plane or the generalized forwarding plane;

The second forwarding unit is configured to query the AGW-AID-RID mapping information in the local cache according to the destination AID after receiving the downlink data message sent by the generalized forwarding plane, and replace the destination RID in the data message with the access After receiving the gateway address and performing tunnel encapsulation, forward it to the access gateway that the terminal accesses; or after receiving the downlink data message from the generalized forwarding plane, strip the RID encapsulated in the data message and perform tunnel encapsulation, according to The destination AID queries the AGW-AID-RID mapping information in the local cache, and forwards the data packet to the access gateway accessed by the terminal.

Further, the above-mentioned communication network may also have the following characteristics:

The connection service network also includes a packet forwarding function (PTF); after the first forwarding unit in the access gateway receives the uplink data message from the base station that the terminal and the communication peer do not belong to the same ILCR, as in the mapping The management module cannot query the RID of the communication peer, encapsulates the terminal RID in a data message, and forwards it to the PTF at which the communication peer belongs; or encapsulates the terminal RID as a source address in a data message and performs tunnel encapsulation , forwarded to the PTF at which the communication peer belongs;

The PTF is used for after receiving the data message delivered by the ILCR or other PTFs, after finding the corresponding RID as the destination address in the message header according to the AID of the communication peer in the data message, and encapsulating the data message through The generalized forwarding plane sends to the peer ILCR or the peer access gateway.

Further, the above-mentioned communication network may also have the following characteristics:

After the first forwarding unit in the access gateway receives the uplink data message from the base station that the terminal and the communication peer do not belong to the same ILCR, if the RID of the communication peer cannot be found in the mapping management module, first cache the For the data message, after querying the RID of the communication peer, the RID of the terminal and the communication peer are used as the source and destination addresses and encapsulated in the data message, and then forwarded to the ILCR after tunnel encapsulation or directly sent to the generalized forwarding plane.

Further, the above-mentioned communication network may also have the following characteristics:

The first forwarding unit in the access gateway is further configured to save the queried AID-RID mapping information of the communication peer to the mapping management module;

After the second forwarding unit in the access gateway receives the downlink data message, it also judges whether the AID-RID mapping information of the communication peer in the data message exists in the mapping management module, and if it does not exist, save it in the mapping In the management module;

The first forwarding unit and the second forwarding unit in the access gateway also judge whether the corresponding relationship between the terminal AID and the communication peer AID in the received data message has been saved in the connection maintenance module, if not, save it to the connection maintenance module. in the maintenance module.

Further, the above-mentioned communication network may also have the following characteristics:

The cut-in unit of the access gateway is also used to query the location information of the peer access gateway, and send a terminal RID update notification to all peer access gateways, carrying new AID-RID mapping information of the terminal;

The mapping management module in the access gateway is further configured to update the locally stored AID-RID mapping information of the terminal after receiving the terminal RID update notification from the opposite terminal.

Further, the above-mentioned communication network may also have the following characteristics:

The access gateway is obtained by expanding the new functional modules required to realize the separation of identity and location on the basis of the functional entity of the access gateway in the Wimax network architecture. The access gateway in the Wimax network architecture The functional entities include an anchor data path function (DPF) module and an authenticator.

The above-mentioned communication network based on the Wimax network architecture supports the application scenario of the mobile terminal, and effectively solves the circuitous routing problem in this scenario.

The deployment of the above-mentioned communication network based on the Wimax network architecture takes into account the requirements of compatible terminals and upper-layer services. It only needs to upgrade the network-side equipment and is compatible with the application scenarios without changing the terminals.

The terminal can initiate communication according to the identity, and realize the addressing of the opposite terminal according to the RID. The present invention also provides a method for the terminal to start up and access the above-mentioned first and second communication networks, including:

After the terminal is turned on, it performs access authentication and initial service flow creation, and then obtains an identity identifier (AID) from the access gateway;

When the access gateway initiates tunnel establishment to the identity location core router (ILCR), the ILCR assigns the terminal a location identifier (RID) pointing to the ILCR, saves the mapping information of the terminal AID and RID, and Notifying the access gateway of the RID allocated to the terminal;

After the access gateway or ILCR obtains the terminal's AID and RID, it initiates a registration request to the terminal's home ILR, carrying the terminal's AID and RID; after receiving the registration request, the ILR saves the terminal's current AID-RID mapping relationship.

Further, the above method can also have the following characteristics:

The AID obtained by the terminal from the access gateway is delivered to the access gateway by the terminal's home AAA server during the terminal's access authentication process.

Further, the above method can also have the following characteristics:

The terminal obtains the terminal's AID from the access gateway through a Dynamic Host Configuration Protocol (DHCP) process or through a mobile IP method, and the AID is a static IP address assigned to the terminal when signing a contract.

Further, the above method can also have the following characteristics:

In the process of establishing the tunnel, the ILCR also goes to the AAA server where the terminal belongs to perform authentication and obtain key information.

In order to enable the terminal to initiate communication according to the identity and realize the addressing of the opposite terminal according to the RID, the present invention also provides a method for the terminal to start up and access the above-mentioned third communication network, including:

After the terminal is turned on, it performs access authentication and initial service flow creation, and then obtains the identity identifier (AID) of the terminal from the access gateway;

The access gateway assigns a location identifier (RID) to the terminal, saves the mapping information of the terminal's AID and RID, and sends a registration request to the ILR at the home of the terminal, carrying the terminal's AID and RID;

After receiving the registration request, the ILR saves the current AID-RID mapping relationship of the terminal.

Further, the above method can also have the following characteristics:

The AID obtained by the terminal from the access gateway is delivered to the access gateway by the terminal's home AAA server during the terminal's access authentication process.

Further, the above method can also have the following characteristics:

The terminal obtains the terminal's AID from the access gateway through a Dynamic Host Configuration Protocol (DHCP) process or through a mobile IP method, and the AID is a static IP address assigned to the terminal when signing a contract.

Further, the above method can also have the following characteristics:

It is during the process that the terminal acquires the AID from the access gateway that the access gateway is triggered to allocate the RID for the terminal.

Further, the above method can also have the following characteristics:

A static tunnel is established between the access gateway and the ILCR, and the AID allocated by the access gateway to the terminal points to the access gateway or to the ILCR with which a static tunnel is established; or

A terminal-based dynamic tunnel is established between the access gateway and the ILCR, and the AID assigned by the access gateway to the terminal points to the access gateway.

In the above-mentioned method for a terminal to access the communication network, the terminal is assigned an identity identifier and a location identifier during terminal access, and the RID of the terminal is registered with the ILC, so that the terminal can initiate communication according to the identity identifier, and implement pairing according to the RID. terminal addressing.

Description of drawings

FIG. 1 is a schematic diagram of an existing Wimax network architecture.

FIG. 2 is a schematic diagram of a network topology of a Separation of Identity and Location (SILSN) architecture of the present invention.

FIG. 3 is a schematic diagram of the topology relationship between the SILSN network and the traditional IP network in FIG. 2 .

FIG. 4a is a schematic diagram of a SILSN network implemented based on the Wimax architecture according to Embodiments 1 to 6 of the present invention.

Fig. 4b is a schematic diagram of a SILSN network implemented based on the Wimax architecture according to Embodiment 7 of the present invention.

Fig. 5 is a flow chart of the first type for a user to start up and log in to the network according to the embodiment of the present invention.

Fig. 6 is a second flow chart of the user booting into the network according to the embodiment of the present invention.

Fig. 7 is a third flow chart of the user booting into the network according to the embodiment of the present invention.

Fig. 8 is a fourth flow chart of the user booting into the network according to the embodiment of the present invention.

FIG. 9 is a block diagram of an access gateway and an ILCR according to Embodiment 1 of the present invention.

FIG. 10 is a block diagram of an access gateway and an ILCR in Embodiment 2 of the present invention.

FIG. 11 is a block diagram of an access gateway and an ILCR according to Embodiment 6 of the present invention.

Detailed ways

The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific examples, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention .

Figure 2 shows a SILSN: Subscriber Identifier & Locator Separation Network (SILSN: Subscriber Identifier & Locator Separation Network) architecture. The network topology of the SILSN architecture is divided into an access network and a backbone network that do not overlap in the topological relationship. The access network is located in the backbone network. The edge is responsible for the access of all terminals, and the backbone network is responsible for the routing and forwarding of data packets between the connected terminals.

There are two types of identifiers in the SILSN architecture network: Access Identifier (AID: Access Identifier) and Routing Identifier (RID: Routing Identifier). Among them, AID is the user identity of the terminal, and the network assigns an AID to each terminal user, which remains unchanged during the terminal's movement; RID is the location identifier assigned by the network to the terminal, which is used in the backbone network. It should be noted that the identity identifier and the location identifier may have different names in different SILSN architectures, but the essence is the same. After the user signs up to become a network user of this architecture, he can open an account and issue a number in the user's home authentication center and home ILR. The authentication center and ILR record the user's attribute data, including the AID assigned to the user. After completing the process of opening an account and issuing a number, the AID is statically assigned to the user, and the user's AID remains unchanged during the effective and legal existence of the user.

In the SILSN architecture, terminals can be one or more of mobile terminals, fixed terminals and nomadic terminals, such as mobile phones, fixed phones, computers and servers.

In the SILSN architecture, the access network is used to provide two-layer (physical layer and link layer) access means for the terminal, and maintain the physical access link between the terminal and the ASN. Possible two-layer access methods include: cellular mobile network technology (GSM/CDMA/TD-SCDMA/WCDMA/Wimax/LTE), DSL, broadband optical fiber access or WiFi access, etc.

In the SILSN architecture, the access service node is used to provide access services for the terminal, maintain the connection between the terminal and the network, allocate RID for the terminal, maintain AID-RID mapping information, register and query the RID of the terminal on the mapping forwarding plane, and implement Functions such as routing and forwarding of data packets.

In the SILSN architecture, the main network elements of the backbone network include:

Access Service Node (ASN: Access Service Node) is used to allocate RID for the terminal, maintain the AID-RID mapping information of the terminal, register with the ILR and query the RID of the terminal, and realize the routing and forwarding of data packets. The terminal must go through The ASN is connected to the backbone network. The RID allocated by the ASN includes address information of the ASN, and when the RID is used as the destination address of the data packet, the data packet will be routed to the ASN.

A common router (CR: Common Router) is used to select a route according to the RID in the data message, and forward the data message with the RID as the destination address.

Identity Location Register (ILR: Identity Location Register), ILR is used to store the identity and location identification mapping information of the terminal, which is also written as AID-RID mapping information in the text, and handles the registration, cancellation and query of the terminal location;

Optionally, the backbone network can also include:

Packet Transfer Function (PTF: Packet Transfer Function), also known as a packet forwarding function node, is used to route and forward data packets with AID as the destination address.

Internet service node (ISN), which has interfaces with general routers, ASNs and ILRs, is used to query and maintain the AID-RID mapping information of the network terminal, and encapsulate, route and forward datagrams between the network and the traditional IP network To realize the interconnection and intercommunication of the two networks.

The above-mentioned ILR, or ILR and PTF constitute the mapping forwarding plane of the backbone network, and the CR, or CR and ISN constitute the generalized forwarding plane of the backbone network. The backbone network may also include other network elements such as an authentication center.

The SILSN architecture can exist and develop in the form of one or more isolated islands of the traditional IP network at the initial stage, or as an extended part of the traditional IP network. The topology relationship between the SILSN architecture and the traditional IP network is shown in Figure 3. The backbone network of the SILSN architecture is on the same plane as the traditional IP, and communicates with the traditional IP network through the ISN. The SILSN architecture has the capability of independent networking, and can form a network that develops independently from the traditional IP network. At this stage, the functional entity ISN will no longer exist.

The SILSN architecture is mainly a technology for the separation of identity and location proposed for the existing mobile Internet. Based on the Wimax network architecture, an embodiment of the SILSN architecture is proposed on the Wimax network architecture. It is mainly aimed at realizing terminal identity and location. Describe the relevant content of the improvement on the original system required for location separation.

Fig. 4a is a schematic diagram of realizing the SILSN architecture based on the Wimax network architecture, in which the solid line indicates the connection of the bearer plane, and the dotted line indicates the connection of the control plane. In a system with SILSN architecture, Wimax traditional terminals can realize mobility without a fixed anchor point, solve the problem of roundabout paths for data packets, and can also achieve the purpose of solving the dual identity of IP addresses.

In this paper, the network element accessed by the communication peer of the terminal is referred to as the peer network element for short; when the terminal switches, the network element switched out by the terminal is referred to as the cut-out network element for short, and the network element that the terminal cuts into is called the switch-in network element. When describing the transmission of information between two network elements, if it is not specified that a certain network element is the peer network element, it should be understood as the information transmission between the network elements on the same side of the terminal access; in addition, for the convenience of expression , when describing the function of a network element, the user terminal connected to the network element is called a terminal, and the user terminal connected to the network element is called a communication peer.

In addition, when a network element receives information sent by another network element, it will distribute the information to a module that stores or processes the information, and this function will not be further described below.

Embodiment one

The communication network with the SILSN architecture implemented based on the Wimax network architecture in this embodiment also includes an access service network (W-ASN), a connection service network (W-CSN) and a generalized forwarding plane, as shown in FIG. 4a. In the W-CSN, there are original network elements in the Wimax architecture such as AAA proxy or server (AAA Proxy/Server), billing server, and interconnection gateway equipment, and an Identity Location Core Router (ILCR for short) is also set. ), an Identity Location Register (ILR) and a Packet Forwarding Function (PTF). The ILR and PTF can be set together, which is represented as ILR/PTF at this time. The ILR/PTF in each W-CSN constitutes a mapping forwarding plane. Among them, ILCR integrates the functions of HA and W-CR, and expands the new functions required to realize the SILSN architecture. The extended functional modules can be set together with the original functional modules, or can be set separately. The W-ASN includes base stations and access gateways. The access gateways are based on the functional entities (such as anchor data channel functions (Anchor DPF), authenticators, etc.) of the access gateways in the Wimax architecture. Extended with new features required to implement SILSN. In addition, the generalized forwarding plane in the communication network includes a packet data network that supports routing and forwarding data packets according to RID (other embodiments are the same as above). There is a data plane interface between the W-CSN and the generalized forwarding plane, denoted as a D interface.

In this embodiment, a terminal-based dynamic tunnel is established between the ILCR and the access gateway. When the terminal registers or switches to the network, the ILCR assigns a RID to the terminal according to a predetermined policy, and the access gateway registers with the ILR. The RID allocated by the ILCR should point to the ILCR. According to business needs, the ILCR can allocate one or more dedicated RIDs for one terminal, or the same RID for multiple terminals. When data packets are forwarded, the ILCR queries the ILR for AID-RID mapping information, and when the terminal is offline, the access gateway cancels the AID-RID mapping information from the ILR.

Please refer to FIG. 9, the WiMAX system of this embodiment includes the following parts:

The Access Gateway (AGW), located in the WiMAX Access Service Network (W-ASN), is used to provide access services and control for user terminals, to register and deregister the terminal at the ILR where the terminal belongs, and to maintain the communication between the terminal and the communication peer. connection information. The access gateway can also be used to cooperate with other access gateways to realize handover of terminals across AGWs and ILCRs. The access gateway also has other functions in the Wimax system, such as cooperating with the AAA server to complete the authentication of the terminal, etc., and this part of the functions will not be described in detail in this article.

In this embodiment, the access gateway includes the following functional entities related to extended functions:

The registration and deregistration module is used to request the terminal's home ILR to register the terminal RID after receiving the terminal AID and the RID allocated for the terminal, carrying the terminal's AID and RID; after learning that the terminal is offline, request the terminal's home ILR Log out of the terminal's RID.

The offline processing module is used to notify the registration and deregistration module and the connection maintenance module when it is determined that the connected terminal is offline; optionally, notify all peer access gateways that the terminal is offline, and notify the connection when it is determined that the communication peer is offline Maintenance module and ILCR. The offline processing module can query the location information of the access gateway of the opposite end from the local or the AAA home server of the communication opposite end. The offline processing module can determine whether the terminal is offline according to the real-time detection mechanism of the stream, or according to the relevant signaling that the terminal is offline. It should be noted that it is optional for the terminal to notify the peer that the terminal is offline when the terminal is offline, and the peer can also determine whether the communication peer is offline through a real-time stream detection mechanism.

The connection maintenance module is used to save the connection information between the terminal and the communication peer; delete the connection information between the terminal and the communication peer after the terminal is offline or removed (including the scene of the presence or absence of the communication peer) or after the communication with the communication peer is terminated; After learning that the communication peer is offline or the communication with the terminal is terminated, the connection information between the communication peer and the terminal is deleted. The related functional modules in the access gateway can notify the connection maintenance module when the terminal moves out or the communication with the communication peer is terminated, similar to ILCR.

The data forwarding module is used to forward the data message between the base station and the ILCR. After receiving the data message, it can determine whether the corresponding relationship between the terminal AID and the communication peer AID in the data message has been stored in the connection maintenance module, such as Not saved, notify the connection maintenance module to save the connection information between the terminal and the communication peer.

The handover module is used to control the handover triggered by the terminal moving to the service area of another anchor DPF module or ILCR when there is a communication peer, including the handover unit and the handover unit:

The cut-out unit is used to control the cut-out of the terminal, notify the ILCR of the terminal switch, forward the data message sent to the terminal received during the switch to the cut-in access gateway, and notify the connection maintenance module after the terminal cuts out; Optionally, the connection information of the terminal and the communication peer stored by the connection maintenance module is sent to the cut-in access gateway.

The cut-in unit is used to control the cut-in of the terminal, and save the connection information between the terminal and the communication peer sent by the cut-out access gateway to the connection maintenance module.

In the WiMAX system, the registration and deregistration module can be co-located with the functional entity authenticator of the access gateway or the anchor DPF module. The connection maintenance module can be set up together with the authenticator or the anchor DPF module. When it is not set up together with the anchor DPF module, the anchor DPF module needs to obtain the AID of the terminal and the communication peer from the data message, and update the new or changed The corresponding relationship between the terminal AID and the communication peer AID is notified to the connection maintenance module for saving or updating. The data forwarding module can be co-located with the anchor DPF module. The switch control module can be co-located with the anchor DPF module.

Identity location core router (ILCR), located in the WiMAX core service network (W-CSN), is used to maintain the session connection of the terminal, assign the RID pointing to this ILCR for the terminal, and query the terminal to the ILR (the terminal here includes the communication peer ), maintain the AID-RID mapping information between the terminal and the communication peer, and realize the routing and forwarding of data packets. The ILCR is also used to cooperate with other ILCRs to realize the switching of terminals across ILCRs.

In this embodiment, ILCR includes the following functional entities related to extended functions:

The tunnel establishment module is used to establish the tunnel between the access gateway and the ILCR, distributes the RID for the terminal, and sends the terminal's AID and the RID to the registration and deregistration module of the access gateway and the local mapping management module; this embodiment adopts The method of dynamically establishing a tunnel means establishing a terminal-based tunnel during the terminal access process.

The mapping management module is used to cache the AID-RID mapping information between the terminal and the communication peer; when it is known that the terminal is switched out or offline, delete the AID-RID mapping information of the terminal, and delete the other communication peers of the terminal that are connected to the ILCR. The AID-RID mapping information of the communication peer with which the terminal has no communication relationship; after learning that the communication between the terminal and the communication peer has terminated, and the communication peer has no communication relationship with other terminals accessing this ILCR, delete the AID-RID of the communication peer Mapping information; when it is known that the communication peer is offline or the communication with the terminal is terminated, delete the AID-RID information of the communication peer; after receiving the terminal RID update notification from the peer, update the locally saved AID-RID mapping information of the terminal ; The mapping management module can uniformly manage the mapping information of all communication peers connected to the ILCR.

The offline processing module is used to notify the mapping management module when it is determined that the connected terminal is offline; when it is determined that the communication peer is offline, notify the mapping management module; Related signaling to determine whether the terminal is offline can determine that the corresponding communication peer is offline according to the terminal offline notification received from the access gateway or the real-time flow detection mechanism.

The message forwarding module is used to encapsulate the RID of the communication peer and the RID of the terminal that are queried from the mapping management module or the ILR of the communication peer's home after receiving the uplink data message, and encapsulate the terminal AID and the communication peer AID together. In the data message, when the terminal and the communication peer do not belong to the same ILCR, it is routed through the generalized forwarding plane and forwarded to the peer ILCR, and the downlink data message is decapsulated, stripped of the RID, and then sent to the terminal.

The message forwarding module includes a first forwarding unit and a second forwarding unit, wherein:

The first forwarding unit is used to, after receiving the uplink data message containing the terminal AID and the communication peer AID sent by the base station, when the terminal and the communication peer do not belong to the same ILCR, if the mapping management module queries the communication peer RID, encapsulating the RID of the terminal and the communication peer as the source and destination addresses in the data message, routing through the generalized forwarding plane and forwarding to the peer ILCR;

If the RID of the communication peer cannot be queried, the ILR of the communication peer is searched for the RID of the communication peer, and the queried AID-RID of the communication peer is saved to the mapping management module. At this time, for the data message, the terminal RID can be encapsulated in the data message as the source address, and forwarded to the PTF (the destination address can be the RID of the PTF at which the communication peer belongs, or the RID of the PTF at the visiting site, and the The PTF of the communication peer is sent to the PTF of the communication peer, etc.), and the PTF is forwarded to the peer ILCR; it can also be cached first, and then the terminal and the RID of the communication peer are used as the source after querying the RID of the communication peer. The destination address is encapsulated in the data packet, routed by the generalized forwarding plane and forwarded to the peer ILCR.

The first forwarding unit may search for the ILR and/or PTF at which the terminal (or peer) belongs by querying the correspondence between the AID of the terminal (or peer) configured locally and the ILR and/or PTF at its origin.

The second forwarding unit is used to decapsulate the received downlink data message from the generalized forwarding plane, strip off the RID, and send it to the terminal through the connection between the ILCR and the terminal; In this paper, whether the AID-RID mapping information of the communication peer exists in the mapping management module, and if it does not exist, it is saved in the mapping management module.

If the first forwarding unit judges according to the AID that the terminal in the uplink data message and the communication peer belong to the same ILCR, the first forwarding unit may not perform RID encapsulation and/or query the RID, and directly send it to the second forwarding unit of the ILCR for processing , the second forwarding unit also does not need to strip the RID encapsulation. Of course, it is also possible not to judge, and to perform encapsulation, routing, and forwarding in the above-mentioned manner that does not belong to the same ILCR. Other embodiments are the same.

For terminals belonging to the same ILCR, is it possible to process data packets in ILCR as an optional method, rather than a mandatory option, that is, ILCR is not excluded and does not determine whether the terminal and the communication peer belong to the same ILCR, the application Existing IP routing mechanism to route. This should also be reflected in the bureaucracy. Similar to other embodiments

The handover control module is used to control the handover triggered by the terminal moving to another ILCR service area when there is a communication peer, including a handover control unit and a handover control unit, wherein:

The switch-out control unit is used to control the switch-out of the terminal, and sends a switch request to the switch-in ILCR where the terminal moves; forwards the data message sent to the terminal received during the switch to the switch-in ILCR; after the terminal switches out Notify the mapping management module; optionally, send the AID-RID mapping information of the communication peer of the terminal to the cut-in ILCR for storage. During the handover, the switch-out control unit may not send the AID-RID mapping information of the communication peer to the switch-in ILCR, and at this time, the switch-in ILCR may reconstruct the mapping information by querying the ILR during the subsequent data message forwarding process.

The cut-in control unit is used to control the cut-in of the terminal, distribute the RID pointing to the ILCR for the terminal and send the AID and the RID of the terminal to the mapping management module and the access gateway; and query the location information of the opposite end ILCR to The peer ILCR sends a terminal RID update notification, carrying the terminal's AID-RID mapping information. The cut-in control unit can find the AIDs of all communication peers of the terminal according to the AID of the terminal to the connection maintenance module of the access gateway, and then find the RID of the communication peers in the mapping management module, and the RID is the position information of the peer ILCR . Other embodiments are also possible.

It should be noted that it is optional to transfer the AID-RID mapping information of the communication peer of the terminal to the cut-in side from the cut-out side, and to transmit the communication relationship information between the terminal and the communication peer. The cut-in side can also initiate the communication process at the terminal Get this information from. Other embodiments are the same.

The identity location register and the packet forwarding function (ILR/PTF) are located in the mapped forwarding plane of the backbone network, and may be two functional modules on the same entity.

The ILR is used to receive registration and deregistration requests for the home user terminal, maintain the AID-RID mapping information of the terminal, and return the RID corresponding to the terminal AID contained in the request to the query after receiving the query request for the terminal requesting party. The ILR can save or update the AID-RID mapping information of the terminal after receiving the registration request of the home user terminal, and delete or invalidate the AID-RID mapping information of the terminal after receiving the logout request of the home user terminal. If a registration or deregistration request for a non-home user terminal is received, it will be forwarded to the home ILR of the terminal for processing. The ILR can be co-located with the AAA server, that is, to extend the existing AAA server to support the ILR function, or it can be an independent network element in the network.

The packet forwarding function (PTF) is optional. The PTF can be set up together with the ILR or separately on the entity. The corresponding RID is found by the AID of the communication peer (for example, it can be searched in the ILR or locally) and encapsulated in the packet header as the destination address, and then the data packet is sent to the peer ILCR through the generalized forwarding plane.

As shown in Figure 4a, the main interfaces in this architecture continue to use the interfaces in the existing WiMAX network, and their functions are extended. include:

● The R3 interface is the interface between the access gateway and the W-CSN. During roaming, the R3 interface is the interface between the access gateway and the visited W-CSN. The difference between the interface function and the R3 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used to register the RID of the terminal with the terminal's home ILR; during roaming, the above-mentioned control plane signaling between the access gateway and the terminal's home ILR will be forwarded by the visited ILR to the home ILR through the R5 interface.

The control plane of the R3 interface is also used to establish a tunnel with the ILCR, transmit the RID information of the terminal, and can also be used to transmit the AID information of the communication peer.

The data plane of the R3 interface is also used for data forwarding between the access gateway and the ILCR, and its message format is:

Among them, the source AID is the AID of the terminal sending the data message, and the destination AID is the AID of the terminal to which the data message is sent; the access gateway adds tunnel encapsulation to the data message before forwarding the data message, and the tunnel encapsulation method There are many, such as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec, etc., and the present invention is not limited to any specific tunnel encapsulation method.

The R4 interface is the interface between the access gateways. The difference between the interface function and the R4 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used to transmit the connection information between the terminal and the communication peer when the user moves.

●The R5 interface is the interface between the visited W-CSN and the home W-CSN during roaming. The difference between the interface function and the R5 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used for registering and deregistering with the ILR where the terminal belongs.

When switching across ILCRs, the R5 interface is also the interface between ILCRs, used for the transmission of switching management signaling, the transmission of RID update messages when the positions of communication peers change, and the data forwarding between ILCRs, and its data packets are switched The following formats may exist for different periods of :

When the ILCR is switched out for RID encapsulation and decapsulation, the message format is:

When switching to ILCR for RID encapsulation and decapsulation, the message format is:

Before forwarding data packets, ILCR adds tunnel encapsulation to data packets. There are many tunnel encapsulation methods, such as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE and IPsec, etc. The present invention is not limited to any specific tunnel encapsulation method.

● The D interface is the interface between the ILCR and the generalized forwarding plane, and is used for forwarding terminal data packets between the ILCR and the generalized forwarding plane. The format of the data packet of its interface is:

The data packet of the D interface encapsulates the source RID as the source address and the destination RID as the destination address on the basis of the data packet of the R1 interface. The source RID is the RID allocated for the terminal sending the data packet, and the destination RID is The RID assigned for the communication peer to which the packet is sent.

● The E interface is the interface between the ILCR and the mapped forwarding plane (ILR/PTF).

The control plane is used to query and maintain AID-RID mapping information. The user plane is used for forwarding terminal data packets between ILCR and PTF. The format of the data packets on the interface is:

The data packet of the E interface is also encapsulated on the basis of the data packet of the R1 interface. The source RID as the source address and the RIDi as the destination address are encapsulated. The routing address of the visited PTF or the home PTF of the communication peer can be obtained from the configuration data on the ILCR.

For the communication network of this embodiment, there are also the following variations:

In the first variation, in this variation, the function of the registration and deregistration module does not exist in the access gateway, and this function module is implemented in the ILCR. The connection information between the terminal and the communication peer is still maintained by the connection maintenance module in the access gateway, and the AID-RID mapping information is still maintained by the ILCR. At this time, the tunnel establishment module and the handover control module of the ILCR do not need to send the AID of the terminal and the RID allocated for the terminal to the access gateway.

The second variation, in this variation, the cut-out control unit in the ILCR obtains the connection information between the terminal and the communication peer and notifies the access gateway, and the offline processing module of the ILCR can determine the terminal and/or communication Whether the opposite end is offline and notifies the access gateway. After the message forwarding module in ILCR receives the data message, it judges whether the corresponding relationship between the terminal AID and the communication peer AID in the data message has been saved in the connection maintenance module. Then it is sent to the connection maintenance module of the access gateway. ILCR can also be set up locally to connect to the maintenance module.

The third variation, in this variation, if the R5 interface does not have the function of transmitting the terminal RID update notification, when the terminal moves and the access ILCR changes, switching to the ILCR needs to pass the terminal RID update notification through the switching access gateway, The peer access gateway transmits it to the peer ILCR. Correspondingly, on the functional module, the cut-in control unit of the ILCR is also used to send the terminal RID update notification to the access gateway, and the cut-in unit of the access gateway is also used to send the terminal RID update notification to the peer access gateway, and receive The terminal RID update notification sent by the peer access gateway is forwarded to the ILCR. R3 interface also needs to increase this function.

Embodiment two

The structure of the communication network in this embodiment is still referring to FIG. The same as the first embodiment, the difference from the first embodiment lies in that the network element where the new functional module required to realize the SILSN is located is different.

In this embodiment, a static tunnel is established between the ILCR and the access gateway, and when the terminal registers or switches to the network, the access gateway assigns the terminal a RID pointing to the access gateway and registers with the ILR. When data packets are forwarded, the access gateway queries the ILR for AID-RID mapping information, and when the terminal is offline, the access gateway cancels the terminal's RID from the ILR.

The block diagram of the access gateway and ILCR is shown in Figure 10.

The access gateway is located in the WiMAX access service network (W-ASN), provides access services and control for user terminals, maintains the session connection of the terminal, assigns the RID pointing to the access gateway for the terminal, registers with the ILR where the terminal belongs, Log out and query the RID of the terminal, maintain the connection information between the terminal and the communication peer, and maintain the AID-RID mapping information between the terminal and the communication peer. The access gateway is also used to cooperate with the AAA server to complete the authentication of the terminal, and to cooperate with other AGWs to realize the handover of terminals across AGWs and ILCRs.

In this embodiment, the access gateway includes the following functional entities related to extended functions:

The RID allocation module is used to allocate a RID pointing to the access gateway for the terminal when the terminal requests access or the terminal cuts in, and sends the RID and the AID of the terminal to the registration deregistration module and the mapping management module.

The registration and deregistration module is used to register the terminal RID at the terminal's home ILR after receiving the terminal AID and the RID allocated for the terminal, carrying the terminal's AID and RID; after learning that the terminal is offline, request the terminal's home The ILR deregisters the terminal's RID.

The connection maintenance module is used to save the connection information between the terminal and the communication peer; delete the connection information between the terminal and the communication peer when it is known that the terminal is offline or removed, or after the communication with the communication peer is terminated; after learning that the communication peer is offline or the communication with the terminal is terminated to delete the connection information between the communication peer and the terminal.

The mapping management module is used to cache and maintain the AID-RID mapping information of the terminal and the communication peer; when it is known that the terminal is switched out or offline, delete the AID-RID mapping information of the terminal, and delete the AID-RID mapping information of the terminal communication peer and the access book Access to the AID-RID mapping information of the communication peer that other terminals of the gateway have no communication relationship with; after learning that the communication between the terminal and the communication peer has terminated, and the communication peer has no communication relationship with other terminals accessing the ILCR, delete the communication The AID-RID mapping information of the opposite end; when the communication end is known to be offline or the communication with the terminal is terminated, delete the AID-RID information of the communication end; after receiving the terminal RID update notification sent by the opposite end, update the locally saved AID of the terminal -RID mapping information. The mapping management module can manage the communication counterparts of all the terminals connected to the access gateway together.

The offline processing module is used to notify the registration and deregistration module, the connection maintenance module and the mapping management module after determining that the terminal connected to the access gateway is offline. The connection maintenance module finds the AIDs of all communication peers of the terminal, and then finds the RIDs of the communication peers in the mapping management module or ILR, and sends a terminal offline notification to all peer access gateways according to the found RIDs, carrying the terminal's AID; when it is determined that the communication peer is offline, notify the connection maintenance module and the mapping management module. The offline processing module can determine that the terminal is offline according to the relevant signaling of the terminal offline process, the real-time flow detection mechanism, etc., and determine that the communication peer is offline according to the terminal offline notification sent by the opposite end, the real-time flow detection mechanism, etc.

The data forwarding module is used to forward data packets between the base station and the ILCR. When an uplink data packet is received and the terminal and the communication peer do not belong to the same ILCR, it will query from the mapping management module or the ILR where the communication peer belongs. The communication peer RID and the terminal RID are encapsulated in a data message containing the terminal AID and the communication peer AID and forwarded to the ILCR; and the downlink data message is decapsulated, stripped of the RID, and then sent to the terminal.

Including a first forwarding unit and a second forwarding unit, wherein:

The first forwarding unit is used to, after receiving the uplink data message containing the terminal AID and the communication peer AID sent by the base station, such as querying the RID of the communication peer in the mapping management module, and using the RID of the terminal and the communication peer as the source , The destination address is encapsulated in the data message, and forwarded to ILCR after tunnel encapsulation; if the RID of the communication peer cannot be found, query the RID of the communication peer at the ILR where the communication peer belongs, and save the queried AID-RID of the communication peer To the mapping management module, at this time, the data message can be forwarded to PTF after encapsulating the terminal RID as the source address, or forwarded to ILCR after encapsulating the terminal RID as the source address and doing tunnel encapsulation (forwarded by ILCR to PTF), the data message can also be cached first, and after the RID of the communication peer is inquired, the RID of the terminal and the communication peer can be encapsulated in the data message as the source and destination addresses, and forwarded to the ILCR after tunnel encapsulation.

The second forwarding unit is used to decapsulate the downlink data message sent by ILCR, strip off the RID and tunnel encapsulation, and send it to the terminal through the connection between the access gateway and the terminal; In this paper, whether the AID-RID mapping information of the communication peer exists in the mapping management module, and if it does not exist, it is saved in the mapping management module.

In addition, the first forwarding unit and the second forwarding unit can also determine whether the corresponding relationship between the terminal AID and the communication peer AID in the data message has been saved in the connection maintenance module, if not, it is saved in the connection maintenance module.

The handover module is used to control the handover triggered by moving to another access gateway service area when the terminal has a communication peer, including a handover control unit and a handover control unit, wherein:

The cut-out unit is used to realize the cut-out of the terminal, and the data message sent to the terminal received during the handover is forwarded to the cut-in access gateway. After the switching is completed, the connection maintenance module is notified, and the mapping management module is also notified. Optionally, the switching-out unit sends the connection information between the terminal and the communication peer and/or the AID-RID mapping information of the terminal's communication peer to the cut-in access gateway for storage.

The cut-in unit is used to realize the cut-in of the terminal; allocate RID for the terminal, save the AID-RID mapping information of the terminal, and send the terminal AID and the RID allocated for the terminal to the registration and deregistration module; optionally, to all peers The access gateway sends a terminal RID update notification, carrying new AID-RID mapping information of the terminal. The cut-in gateway can find the AIDs of all communication peers of the terminal according to the AID of the terminal to the connection maintenance module, and then find the RIDs of the communication peers in the mapping management module or ILR, and send the terminal RID update notification according to the found RID.

In the WiMAX system, the RID allocation module can be co-located with the anchor DPF. The registration and deregistration module can be co-established with the functional entity authenticator of the access gateway or the anchor DPF module. The connection maintenance module can be set up together with the authenticator or the anchor DPF module. When it is not set up together with the anchor DPF module, the anchor DPF module needs to obtain the AID of the terminal and the communication peer from the data message, and update the new or changed The corresponding relationship between the terminal AID and the communication peer AID is notified to the connection maintenance module for saving or updating. The mapping management module, data forwarding module and switching module can be co-located with the anchor DPF.

The Identity Location Core Router (ILCR), located in the WiMAX Core Service Network (W-CSN), is used to maintain the session connection of the terminal, establish a tunnel between the access gateway and the ILCR, and between the generalized forwarding plane and the access gateway Routing and forwarding the data message with the RID format as the source address and the destination address, this function is no different from that of the router in the prior art. The terminal can access the home ILCR or the visited ILCR.

In this embodiment, ILCR includes the following functional entities related to extended functions:

The tunnel establishment module is used to establish a static tunnel between the access gateway and the ILCR, that is, to establish a network element-level tunnel when the AGW or the ILCR is powered on.

The mapping management module is used to cache and maintain the AGW-AID-RID mapping information of the terminal after the tunnel between the access gateway (AGW) and the ILCR is established, wherein the AID and RID information can be extracted from the data message, and the AGW The information is obtained according to the corresponding relationship between the AGW and the tunnel.

The packet forwarding module is used for forwarding the data packets of the terminals connected to the local ILCR between the generalized forwarding plane and the access gateway, which needs to perform tunnel encapsulation and decapsulation. There is no difference from routers in the prior art. It can also be used to strip the tunnel encapsulation from the data message sent by the access gateway to the PTF and forward it to the PTF.

The handover control module is used when the terminal moves to another ILCR service area, including a handover control unit and a handover control unit, and this module is optional. in:

The switch-out control unit is used to control the terminal to move out of the ILCR, determine the switch-in ILCR according to the moving destination, and send a switch request to the switch-in ILCR, and forward the data message sent to the terminal received during the switch to the switch-in ILCR, after the switch is completed Notify the mapping management module. The mapping management module deletes the AGW-AID-RID mapping information of the terminal.

The cut-in control unit is used to control the terminal access and cut-in ILCR.

The identity location register/packet forwarding function (ILR/PTF) is the same as the ILR/PTF in Embodiment 1, and the PTF is optional. The authentication center is the same as the authentication center in Embodiment 1.

As shown in Figure 4a, the main interfaces in this architecture continue to use the interfaces in the existing WiMAX network, and their functions are extended. include:

● The R3 interface is the interface between the access gateway and the W-CSN. During roaming, the R3 interface is the interface between the access gateway and the visited W-CSN. The difference between the interface function and the R3 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used for the access network to register, deregister, and query the terminal's home ILR; the data plane can be used for data forwarding between the access gateway and the mapping forwarding plane PTF, and the format of the data message is:

The data message of the R3 interface encapsulates the source RID as the source address and the RIDi as the destination address on the basis of the data message of the R1 interface, where the source RID is the RID allocated for the terminal sending the data packet, and the RIDi is the mapping The routing address of the visited PTF or the home PTF of the communication peer in the forwarding plane can be obtained from the configuration data on the access gateway.

The above-mentioned control plane signaling and data plane messages between the access gateway and the ILR/PTF will be forwarded by the visited ILR/PTF to the home ILR/PTF through the R5 interface during roaming.

Alternatively, no message forwarding is performed between the above access gateway and the PTF, but the access gateway encapsulates the message in a tunnel and sends it to the ILCR, and the ILCR strips off the tunnel encapsulation and forwards the message to the PTF. The format of the data message transmitted between the access gateway and the ILCR is as follows:

The data plane of the R3 interface is also used for data forwarding between the access gateway and the ILCR, and its message format is:

The data packet of the access gateway and the ILCR interface encapsulates the source RID as the source address and the destination RID as the destination address on the basis of the data packet of the R1 interface, where the source RID is the RID assigned by the terminal sending the data packet, and the destination RID is the RID of the communication peer to which the packet is sent.

Before the access gateway forwards the data message, it also adds tunnel encapsulation to the data message. There are many tunnel encapsulation methods, such as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec, etc., the present invention is not limited to any of them.

The R4 interface is the interface between the access gateways. The difference between the interface function and the R4 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used to transmit the terminal RID update notification when the terminal RID changes. It can also transmit the connection information between the terminal and the communication peer, the communication peer AID-RID mapping information when the terminal is switched, and transmit the terminal offline notification when the terminal is offline.

The data plane is used to forward the data message from the switch-out access gateway to the switch-in access gateway when the terminal is switched. The format of the message may have the following formats in different periods of switchover:

When switching out the access gateway for RID encapsulation and decapsulation, the message format is the same as that of the prior art.

When switching to the access gateway for RID encapsulation and decapsulation, the message format is:

●The R5 interface is the interface between the visited W-CSN and the home W-CSN during roaming. The difference between the interface function and the R5 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used for forwarding the signaling of registration, deregistration and terminal RID query between the access gateway and the terminal home ILR between the visited ILR and the home ILR, or between the visited ILR, the relay ILR and the home ILR; the data plane , used for data forwarding between the access gateway and the mapping forwarding plane, and the format of the data message is the same as that of the R3 interface.

The data plane is used for data forwarding between the access gateway and the mapping and forwarding plane PTF, and the format of the data message is the same as the format of the data message between the access gateway and the mapping and forwarding plane PTF in the R3 interface.

When switching across ILCRs, the R5 interface is still the interface between ILCRs, and is used for the transfer of switching management signaling and data forwarding between ILCRs. The format of the data message is:

Layer 2 Header Tunnel encapsulation Source RID Purpose IP header(..., source Datagram (R5) RID AID, purpose AID, ...) text net load

Before forwarding data packets, ILCR adds tunnel encapsulation to data packets. There are many tunnel encapsulation methods, such as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE and IPsec, etc. The present invention is not limited to any specific tunnel encapsulation method.

● The D interface is the same as the D interface in the first embodiment.

● E interface, optional, the data plane is the same as the data plane of the E interface in Embodiment 1, and there is no control plane interface.

Embodiment Three

The structure of the communication network in this embodiment still refers to Figure 4a, including the access service network (W-NSP), the connection service network (W-CSN) and the generalized forwarding plane, and the network elements included in the W-NSP and W-CSN are also the same , the difference is that the new functional modules required to realize the SILSN are located in different network elements.

In this embodiment, a static tunnel is established between the ILCR and the access gateway. When the terminal registers or switches to the network, the access gateway assigns the terminal a pointing RID and registers the terminal's RID with the terminal's home ILR. The RID allocated by the access gateway should point to the ILCR that establishes a static tunnel with the access gateway. When data packets are forwarded, the access gateway inquires the RID of the corresponding terminal locally or from the PTF at which the corresponding terminal belongs. When the terminal is offline, the access gateway cancels the RID of the terminal to the ILR at which the terminal belongs. Compared with the second embodiment, since the allocated RID points to the ILCR establishing a static tunnel with the access gateway, the format of the data packet is different, and the processing of the data packet header by the access gateway and the ILCR is different.

in:

The overall functions of the access gateway in this embodiment are the same as those in the second embodiment, and the functions of the registration and deregistration module, connection maintenance module, mapping management module and switching module contained therein are also the same as those of the corresponding modules in the second embodiment. The included RID allocation module and data forwarding module are different from Embodiment 2 in specific processing, as follows:

The offline processing module is basically the same as the second embodiment, the difference is: because the assigned RID points to ILCR, when the offline processing module notifies the peer access gateway that the terminal is offline, it needs to find all communication pairs of the terminal in the connection maintenance module according to the terminal AID. The AID of the end, and then query the location information of the access gateway of the opposite end from the local or the AAA server of the communication opposite end. It can also be sent to the peer ILCR first through the communication peer RID, and the peer ILCR is transferred to the peer access gateway.

The RID allocation module is basically the same as the second embodiment, the difference is that the RID allocated to the terminal points to the ILCR that establishes a static tunnel with the access gateway, and the data message whose destination address is the RID will be finally routed to the ILCR.

The data forwarding module is used for forwarding data packets between the base station and the ILCR, including a first forwarding unit and a second forwarding unit, wherein the first forwarding unit has the same function as the first forwarding unit of the access gateway in the second embodiment Similarly, it is only necessary to replace the terminal RID encapsulated in the data packet sent by the access gateway to the generalized forwarding plane in the second embodiment with the address of the access gateway. The second forwarding unit is used to strip off the communication peer RID, access gateway address and tunnel encapsulation encapsulated in the data message after receiving the data message from the ILCR, and then pass the connection between the access gateway and the terminal sent to this terminal. Optionally, it is judged whether the AID-RID mapping information of the communication peer in the data message exists in the mapping management module, and if not, it is saved in the mapping management module. In a variant of this embodiment, the ILCR strips the RID in the downlink data message and forwards it to the access gateway. At this time, the access gateway only needs to strip the tunnel encapsulation before sending it to the terminal. The ingress gateway obtains the AID-RID mapping information of the communication peer through the message sent by the terminal.

The overall function of the ILCR of this embodiment is the same as that of the ILCR in the second embodiment, and the functions of the tunnel establishment module, the mapping management module and the switching control module included therein are the same as those of the corresponding modules in the ILCR of the second embodiment, and the details of the message forwarding module The processing is different from the second embodiment, as follows:

The message forwarding module is used to forward the data message of the terminal accessing the ILCR between the generalized forwarding plane, the mapped forwarding plane and the access gateway, including:

The first forwarding unit is configured to query the AGW-AID-RID mapping information in the local cache according to the source AID after receiving the uplink data message sent by the access gateway, and replace the access gateway address as the source address with the terminal After the RID and the tunnel encapsulation are stripped off, the data packet is forwarded to the mapped forwarding plane or the generalized forwarding plane according to the destination address.

The second forwarding unit is configured to query the AGW-AID-RID mapping information in the local cache according to the destination AID after receiving the downlink data message sent by the generalized forwarding plane, and replace the destination RID in the data message with the access After encapsulating the gateway address and performing tunnel encapsulation, the data packet is forwarded to the access gateway accessed by the terminal. In a modification of this embodiment, after receiving the downlink data message sent by the generalized forwarding plane, the RID encapsulated in the data message is stripped and encapsulated in a tunnel, and the AGW-AID-RID mapping in the local cache is queried information, and forward the data packet to the access gateway accessed by the terminal.

Identity location register/packet forwarding function (ILR/PTF), authentication center are the same as ILR/PTF and authentication center in the second embodiment.

As shown in Figure 4a, the main interfaces in this architecture follow the interfaces in the existing WiMAX network, and their functions are extended. include:

●The difference between the R3 interface function and the R3 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used to register with the ILR of the home terminal, log out and query the RID of the terminal; the data plane is used for data forwarding between the access gateway and the mapping forwarding plane PTF, or the access gateway encapsulates the message as a tunnel before sending it To the ILCR, the ILCR strips off the tunnel encapsulation and forwards it to the PTF. Its function and message format are the same as those in Embodiment 2.

The data plane of the R3 interface is also used for data forwarding between the access gateway and the ILCR. Its message format can be:

The data message encapsulates the AGW address as the source address and the destination RID as the destination address on the basis of the data message of the R1 interface, and the destination RID is the RID of the communication peer to which the data packet is sent.

In a variant of this embodiment, the packet format for data forwarding between the access gateway and the ILCR may also be the same as in Embodiment 2, and the RID of the terminal sending the data packet is encapsulated as a source address, as follows:

At this time, the RID address assigned by the access gateway still points to the ILCR, but the first forwarding unit in the access gateway no longer encapsulates the address of the access gateway as the source address in the uplink data message, and its function is similar to that of the second embodiment. The first forwarding unit of the ingress gateway is the same. The function of the message forwarding module on the ILCR can be the same as that of the message forwarding module in the ILCR in Embodiment 2, and there is no need to replace the AGW address and the source RID. Of course, the ILCR can still strip the RID in the message, and then The ingress gateway does not need to strip the RID in the received message.

● The R4 interface is the same as the R4 interface in the second embodiment.

● The R5 interface is the same as the R5 interface in the second embodiment.

● The D interface is the same as the D interface in the second embodiment.

● The E interface is the same as the E interface in the second embodiment.

Embodiment Four

In this embodiment, a terminal-based dynamic tunnel is established between the Identity Location Core Router (ILCR) and the access gateway. When the terminal registers or switches to the network, the access gateway assigns a RID to the terminal, and registers the terminal's RID with the ILR. When data packets are forwarded, the access gateway queries the ILR for AID-RID mapping information, and when the terminal is offline, the access gateway cancels the RID of the terminal from the ILR.

The communication network of this embodiment is basically the same as the communication network of Embodiment 2, except that a dynamic tunnel is established between the access gateway and the ILCR, that is, the functional entity "tunnel establishment module" of the ILCR establishes a terminal-based tunnel during the terminal access process At this time, the ILCR no longer needs the mapping management module, and the switching control module does not need to maintain the AGW-AID-RID mapping information. In addition, other functional entities and their functions of this architecture are the same as the corresponding functional entities in Embodiment 2.

Embodiment five

In this embodiment, a terminal-based dynamic tunnel is established between the Identity Location Core Router (ILCR) and the access gateway. When the terminal registers or switches to the network, the access gateway assigns a RID to the terminal and registers the terminal's RID with the ILR. The RID assigned by the access gateway shall point to the ILCR to which the access gateway is connected. When data packets are forwarded, the access gateway queries the ILR for AID-RID mapping information, and when the terminal is offline, the access gateway cancels the RID of the terminal from the ILR.

The communication network with identity identification and location separation architecture implemented based on the WiMAX system in the fifth embodiment is basically the same as the communication network in the third embodiment, except that a dynamic tunnel is established between the access gateway and the ILCR, that is, the functional entity "tunnel establishment" of the ILCR "module" establishes a terminal-based tunnel during the terminal access process. At this time, the mapping management module and switching control module in ILCR no longer need to maintain the AGW-AID-RID mapping information. In addition, other functional entities and their functions of this architecture are the same as the corresponding functional entities in Embodiment 3.

Embodiment six

In this embodiment, a terminal-based dynamic tunnel is established between the Identity and Location Core Router (ILCR) and the access gateway. Said to be the AID-RID mapping information of the registered terminal). The RID assigned by the ILCR shall point to that ILCR. When data packets are forwarded, the ILCR queries the ILR for AID-RID mapping information, and when the terminal is offline, the ILCR cancels the RID of the terminal from the ILR.

The communication network with identity identification and location separation architecture implemented based on the WiMAX system in this embodiment includes the following parts:

The access gateway has the same function as the prior art.

The Identity Location Core Router (ILCR), located in the WiMAX Core Service Network (W-CSN), is used to assign RIDs to terminals, register, deregister and query the RIDs of terminals at the ILR belonging to the terminals, maintain the connection information between terminals and communication peers, and maintain The session connection of the terminal maintains the AID-RID mapping information between the terminal and the communication peer, and realizes the routing and forwarding of data packets. The ILCR is also used to cooperate with other ILCRs to realize the switching of terminals across ILCRs.

As shown in Figure 11, in this embodiment, ILCR includes the following functional entities related to extended functions:

The tunnel establishment module is used to establish a tunnel between the access gateway and the ILCR, assigns a RID to the terminal, and sends the terminal's AID and the RID to the mapping management module and the registration and deregistration module; this embodiment adopts the method of dynamically establishing a tunnel, That is, a terminal-based tunnel is established during the terminal access process.

The registration and deregistration module is used to request the terminal's home ILR to register the terminal RID after receiving the terminal AID and the RID allocated for the terminal, carrying the terminal's AID and RID; after learning that the terminal is offline, request the terminal's home ILR Log out of the terminal's RID.

The connection maintenance module is used to save the connection information between the terminal and the communication peer; delete the connection information between the terminal and the communication peer when it is known that the terminal is offline or removed, or after the communication with the communication peer is terminated; after learning that the communication peer is offline or the communication with the terminal is terminated to delete the connection information between the communication peer and the terminal. This module is optional, and if the mapping management module stores information about the corresponding relationship between the terminal and the AID-RID of the communication peer, the connection maintenance module can be ignored.

The mapping management module is the same as that of the ILCR in Embodiment 1.

The offline processing module is used to notify the registration and deregistration module, the mapping management module and the connection maintenance module when it is determined that the connected terminal is offline. Optionally, query the location information of the peer ILCR and notify the peer ILCR that the terminal is offline. When it is determined that the communication peer is offline, the mapping management module and the connection maintenance module are notified. The offline processing module can determine whether the terminal is offline according to the real-time detection mechanism of the flow, or according to the relevant signaling that the terminal is offline, and can determine whether the corresponding communication peer is offline according to the received offline notification of the terminal or the real-time flow detection mechanism. The method for the offline processing module to query the location information of the opposite end ILCR can be to first find out the AIDs of all communication opposite ends from the connection information between the terminal and the communication opposite end saved by the terminal AID to the connection maintenance module, and then use the found AID to save in the mapping management module The corresponding RID is found in the AID-RID mapping information of the corresponding communication peer, and the found RID is the location information of the peer ILCR.

The message forwarding module has the function of the message forwarding module of the ILCR in the first embodiment, and includes a first forwarding unit and a second forwarding unit. Only in this embodiment, the uplink data message received by the first forwarding unit is sent by the access gateway. In addition, the first forwarding unit and the second forwarding unit also judge the terminal AID and communication pair in the received data message. Whether the corresponding relationship of the terminal AID has been saved in the connection maintenance module, if not, it is saved in the connection maintenance module.

A switch control module, including a switch-out control unit and a switch-in control unit, wherein:

The cut-out control unit is used to control the cut-out of the terminal. When the terminal moves, it determines the cut-in ILCR to which the terminal will move according to the destination of the move. During this period, the data packets sent to the terminal received are forwarded to the cut-in ILCR. Optionally, the connection information between the terminal and the communication peer and/or the AID-RID mapping information of the communication peer are sent to the cut-in ILCR.

The cut-in control unit is used to control the cut-in of the terminal. When the terminal moves from another ILCR to the service area of the ILCR, the terminal is assigned a RID pointing to the ILCR, and the AID and the RID of the terminal are sent to the registration and deregistration module And save to the mapping management module; Optionally, query the location information of the opposite end ILCR (the query method is the same as the offline processing module), send a terminal RID update notification to the opposite end ILCR, and carry the AID-RID mapping information of the terminal.

The identity location register/packet forwarding function (ILR/PTF) is the same as the ILR/PTF in the first embodiment. The authentication center is the same as the authentication center in Embodiment 1.

As shown in Figure 4a, the main interfaces in this architecture continue to use the interfaces in the existing WiMAX network, and their functions are extended. include:

● The R3 interface is the interface between the access gateway and the W-CSN. During roaming, the R3 interface is the interface between the access gateway and the visited W-CSN. The function of the interface is the same as that of the R3 interface in the existing WiMAX network.

● The R4 interface is the interface between the access gateways, and the function of the interface is the same as that of the R4 interface in the existing WiMAX network.

●The R5 interface is the interface between the visited W-CSN and the home W-CSN during roaming. The difference between the interface function and the R5 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used for the ILCR to register with the terminal's home ILR and cancel the terminal's RID; the data plane can be used for data forwarding between the ILCR and the mapping forwarding plane PTF, and the format of the data message is the same as the E interface.

When switching across ILCRs, the R5 interface is still the interface between ILCRs, used for the transmission of switching management signaling, and is also used to transmit terminal RID update notifications to the peer ILCR when the terminal RID changes, and can also be used for switching out of ILCR to switching in The ILCR transmits the connection information between the terminal and the communication peer, and the AID-RID mapping information of the communication peer. The data plane is used for data forwarding between ILCRs, and the format of the data message is:

Before forwarding data packets, ILCR adds tunnel encapsulation to data packets. There are many tunnel encapsulation methods, such as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE and IPsec, etc. The present invention is not limited to any specific tunnel encapsulation method.

● The D interface is the same as the D interface in the first embodiment.

● The E interface is the interface between the ILCR and the mapping forwarding plane.

The control plane is used for the ILCR to register with the ILR, deregister and query the RID of the terminal. The user plane is used for the forwarding of terminal data packets between the ILCR and the mapping forwarding plane PTF. The format of the data packets on the interface is:

The data packet of the E interface encapsulates the source RID as the source address and the RIDi as the destination address on the basis of the data packet of the R1 interface. The source RID is the RID of the terminal that sends the data packet, and the RIDi is the access address in the mapping forwarding plane. The local PTF or the routing address of the corresponding home PTF can be obtained from the configuration data on the ILCR.

Embodiment seven

Fig. 4b is a schematic diagram of a communication network (also referred to as a WiMAX system network that realizes the separation of identification and labeling) implemented based on the Wimax network architecture in this embodiment. The communication network includes access services Network (W-ASN), connection service network (W-CSN) and generalized forwarding plane, W-CSN has AAA proxy or server (AAA Proxy/Server), billing server, interconnection gateway equipment and other original Wimax architecture The network element is also provided with an identity location register (ILR)/packet forwarding function (PTF), and the ILR/PTF in each W-CSN constitutes a mapping forwarding plane. The HA and/or W-core router in the W-CSN can be retained, or their functions can also be transferred to the access gateway for implementation. The W-ASN includes base stations and access gateways, where the access gateway expands the new functions needed to realize the SILSN on the basis of the functional entities of the access gateway in the Wimax architecture. In addition, the generalized forwarding plane in the communication network includes multiple routers supporting RID routing and forwarding, and there is a data plane interface between the W-ASN and the generalized forwarding plane, denoted as a D1 interface. There may be a data plane interface between the W-CSN and the generalized forwarding plane, denoted as D2, through which the PTF sends data packets to the generalized forwarding plane, and then sent by the generalized forwarding plane to the access gateway accessed by the communication peer.

In this embodiment, the ILCR does not exist in the WiMAX network, and the access gateway serves as the endpoint of the external data channel. When the terminal registers with the network or switches over, the access gateway assigns the terminal a RID pointing to the access gateway and registers the terminal's RID with the ILR. According to service requirements, the access gateway can allocate one or more dedicated RIDs to a terminal, and can also allocate the same RID to multiple terminals. When data packets are forwarded, the access gateway queries the ILR for AID-RID mapping information. information).

In the communication network of this embodiment:

The access gateway is located in the WiMAX access service network (W-ASN), and is used to provide access services and control for user terminals, assign RIDs pointing to the access gateway for the terminals, and register, deregister and query terminals with the ILR where the terminals belong RID, maintain the connection information between the terminal and the communication peer, maintain the AID-RID mapping information between the terminal and the communication peer, realize the routing and forwarding of data packets, and cooperate with other access gateways to realize the switching of terminals across AGWs.

In this embodiment, the access gateway includes the following functional entities:

The RID allocation module is the same as the RID allocation module of the access gateway in the second embodiment.

The registration and deregistration module is the same as the registration and deregistration module of the access gateway in the second embodiment.

The connection maintenance module is the same as the connection maintenance module of the access gateway in the second embodiment.

The mapping management module is the same as the mapping management module of the access gateway in the second embodiment.

The data forwarding module includes a first forwarding unit and a second forwarding unit:

The first forwarding unit is configured to receive the uplink data message containing the terminal AID and the communication peer AID sent by the base station, if the RID of the communication peer is found in the mapping management module, and the RID of the terminal and the communication peer is used as the source 1. The destination address is encapsulated in the data message and sent to the generalized forwarding plane; if the RID of the communication peer cannot be found, query the RID of the communication peer at the ILR at the corresponding communication peer; and save the queried AID-RID of the communication peer to Mapping management module; at this time, the data message can be forwarded to the PTF after encapsulating the terminal RID as the source address, or the data message can be cached first, and then the terminal and the communication peer’s The RID, as the source and destination addresses, is encapsulated in the data packet and forwarded to the generalized forwarding plane.

The second forwarding unit is used to decapsulate the downlink data message sent by the generalized forwarding plane, strip off the RID, and send it to the terminal through the connection between the access gateway and the terminal; optionally, judge the data message In this paper, whether the AID-RID mapping information of the communication peer exists in the mapping management module, and if it does not exist, it is saved in the mapping management module.

The switching module is the same as the switching module of the access gateway in the second embodiment.

The identity location register/packet forwarding function (ILR/PTF) is the same as the ILR/PTF in the first embodiment. The authentication center is the same as the authentication center in Embodiment 1.

As shown in Figure 4b, the main interfaces in this architecture continue to use the interfaces in the existing WiMAX network, and their functions are extended. include:

● The R3 interface is the interface between the access gateway and the W-CSN. During roaming, the R3 interface is the interface between the access gateway and the visited W-CSN. The difference between the interface function and the R3 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used for the access gateway to register with the terminal's home ILR, deregister and query the RID of the terminal; the data plane is used for data forwarding between the access gateway and the mapping forwarding plane, and the format of the data message is:

The data message of the R3 interface is based on the data message of the R1 interface, and a new three-layer header is encapsulated. The source address in the new three-layer header is the source RID, and the destination address is RIDi, where the source RID is the sending data packet The RID of the terminal, RIDi is the routing address mapped to the visited PTF or the home PTF of the communication peer in the forwarding plane, which can be obtained from the configuration data on the access gateway.

The above-mentioned control plane signaling and data plane messages between the access gateway and the ILR will be forwarded by the visited ILR to the home ILR through the R5 interface during roaming.

The R4 interface is the interface between the access gateways. The difference between the interface function and the R4 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used to transmit the terminal RID update notification when the terminal RID changes, and also transmit the connection information between the terminal and the communication peer, the communication peer AID-RID mapping information when the terminal is switched, and transmit the terminal offline notification when the terminal is offline.

The data plane is used to forward the data message from the switch-out access gateway to the switch-in access gateway when the terminal is switched. The format of the message may have the following formats in different periods of switchover:

When switching out the access gateway for RID encapsulation and decapsulation, the message format is the same as that of the prior art.

When switching to the access gateway for RID encapsulation and decapsulation, the message format is:

Second-tier newspaper tunnel seal Source RID Purpose IP header(..., source Data packet net head Pack (R4) RID AID, purpose AID, ...) charge

●The R5 interface is the interface between the visited W-CSN and the home W-CSN during roaming. The difference between the interface function and the R5 interface function in the existing WiMAX network is mainly reflected in the following aspects:

The control plane is used for forwarding the signaling of registration, deregistration and terminal RID query between the access gateway and the terminal home ILR between the visited ILR and the home ILR, or between the visited ILR, the relay ILR and the home ILR; the data plane , used for data forwarding between the access gateway and the mapping forwarding plane, and the format of the data message is the same as that of the R3 interface.

● The D1 interface is an interface between the access gateway and the generalized forwarding plane, and is used for forwarding terminal data packets between the access gateway and the generalized forwarding plane. The format of the data packet of its interface is:

The data message of the D1 interface is based on the data message of the R1 interface and encapsulates a new three-layer header. The new three-layer header includes the source RID and the destination RID, and the source RID is assigned to the terminal sending the data packet. The RID of the destination RID is the RID allocated for the communication peer to which the data packet is sent.

● The D2 interface is an interface between the home PTF and the generalized forwarding plane, and is used for forwarding terminal data packets between the homed PTF and the generalized forwarding plane. The format of the data message of the interface is the same as that of the D1 interface.

In all the above-mentioned system architecture networks of the present invention (referred to as this architecture network), the AID identifies a terminal user identity, and the AID is used inside the architecture network to identify the end user. In order to support traditional terminals, the AID of the architecture network can adopt the IPV4/IPv6 addresses in the traditional network.

In this architecture network, during the process of sending data packets, the access gateway or ILCR can establish and update the connection information between the terminal and the communication peer according to the real-time flow detection mechanism.

In this architecture network, the RID can use the IPV4/IPv6 address format generally supported by routers in the existing traditional network to indicate the ILCR location where the current terminal is located. The scope of the RID is in the generalized forwarding plane of the network backbone network of this architecture.

FIG. 5 and FIG. 6 are flowcharts of a terminal accessing the network based on the communication network in Embodiment 1, and the terminal may be a traditional terminal.

Figure 5 is applicable to the scenario where the access gateway directly obtains the AID of the communication peer. In this embodiment, a simple IP terminal (that is, a terminal that does not support mobile IP) is used as an example to illustrate the process of booting into the network. The specific steps are described as follows:

In step 501, the terminal is turned on, and the access authentication process of the terminal is performed through interaction between the base station, the AGW, the visited AAA server and the home AAA server. In this process, the home AAA server sends the static contracted IP address of the terminal to the AGW;

Step 502, the terminal initiates a service flow creation process. In this process, the preset service flow of the terminal can be created at the same time;

In step 503, the terminal acquires an IP address through a Dynamic Host Configuration Protocol (DHCP) process. This IP address is the AID of the terminal;

In another embodiment, the AID may also be different from the IP address, and the subscribed AID may also be stored in the terminal's home AAA server and sent to the AGW through an access authentication process.

Step 504, triggered by step 503, in the DHCP process for the terminal to obtain an IP address, the AGW needs to initiate a tunnel establishment process between the AGW and the ILCR to the ILCR;

Wherein the tunnel between AGW and ILCR can be in many ways, such as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec etc., the present invention is not limited to any specific tunnel mode. When using MIP, the establishment and maintenance of tunnels are the same as those in existing WiMAX networks.

In step 504a, the ILCR allocates a RID to the terminal when the tunnel is established, and the RID points to the ILCR. The ILCR saves the mapping relationship between the terminal AID and the RID;

In Variation 1 of Embodiment 1, the registration and deregistration module is in ILCR. At this time, in this step, ILCR initiates a registration process to the terminal's home ILR.

Step 504b, the ILCR notifies the AGW of the RID allocated to the terminal during the tunnel establishment process;

Step 505, triggered by step 504, when establishing the tunnel between AGW and ILCR, ILCR needs to authenticate to the home AAA server to obtain key information;

In Variation 1 of Embodiment 1, if the registration and deregistration module is implemented by ILCR, then in this step, the AID registration process initiated by ILCR to the terminal's home ILR can be triggered at the same time, and the RID allocated by ILCR for the terminal can be registered ;

In step 506, if the creation of the preset service flow does not occur in step 503, it may be performed in this step. At this time, it is also possible to modify the initial business flow or preset business flow;

Step 507, if the registration and deregistration module is implemented by the AGW, this step needs to be performed. The AGW initiates a registration process to the ILR where the terminal belongs, and registers the RID allocated by the ILCR for the terminal;

Step 508, after receiving the AID registration request from the AGW, the home ILR saves the current AID-RID mapping relationship of the terminal;

When the AID registration process is performed in step 505, this step can be performed directly after step 505.

At this point, the terminal has successfully connected to the network and can start to transmit data packets.

Step 509, the terminal and the communication peer perform data packet transmission;

Step 509a, after the AGW receives the data message from the terminal and the communication peer, obtains the AID information in the message, establishes the connection information between the terminal and the communication peer (that is, the mapping between the terminal AID and the communication peer AID), and caches it locally.

In this step, the AGW may first check the locally cached connection information between the terminal and the communication peer, and if there is no connection information between the terminal and the communication peer, then create and cache the connection information of the two;

Step 509b, after the ILCR receives the data message sent by the terminal to the communication peer, it queries the AID-RID mapping information in the local cache according to the AID of the communication peer as the destination address in the data message, if the AID-RID mapping information of the communication peer is found RID, the RID of the communication peer is used as the destination address, and the RID of the terminal is used as the source address, encapsulated in the data message (for example, it can be encapsulated in the newly added three-layer message header of the data message), and then the encapsulated The final data message is forwarded to the generalized forwarding plane; if the RID of the communication peer is not found, the data message is tunnel-encapsulated and forwarded to the PTF of the mapping forwarding plane, and the RID of the communication peer is inquired from the ILR of the communication peer's home;

After the ILCR receives the data message sent by the communication peer to the terminal connected to the ILCR, it strips off the RID encapsulated in the data message and sends it to the terminal through the connection between the ILCR and the terminal.

FIG. 6 is applicable to the scenario where the ILCR directly obtains the AID of the communication peer and then notifies the access gateway, and is based on the communication network of the second variant of the first embodiment. In this embodiment, a simple IP terminal (that is, a terminal that does not support mobile IP) is used as an example to illustrate the process of booting into the network, and its specific steps are described as follows:

Step 601 to step 608 are the same as step 501 to step 508.

Step 609, the terminal transmits data packets with the communication peer.

Step 609a is the same as step 509b.

Step 609b: After receiving the data message from the terminal and the communication peer, the ILCR obtains the AID information in the message, establishes the connection information (mapping of AID1-AID2) between the terminal and the communication peer, and caches it locally. In this step, the ILCR may first check the locally cached connection information between the terminal and the communication peer, and if there is no connection information between the terminal and the communication peer, then create and cache the connection information of the two.

Step 610, when the connection information between the terminal and the communication peer does not exist locally in the ILCR, the ILCR notifies the AGW of the obtained connection information (mapping of AID1-AID2) between the terminal and the communication peer. The AGW caches the connection information locally.

FIG. 7 is a flow chart of a terminal accessing a network based on Embodiments 2 and 3 of this embodiment. The terminal may be a traditional terminal.

Figure 7 is applicable to the scenario where a tunnel has been statically established between the AGW and the ILCR before the user accesses the network. This embodiment uses a simple IP terminal (that is, a terminal that does not support mobile IP) as an example to illustrate the process of booting into the network. The specific steps are described as follows :

Step 701, after the AGW/ILCR is powered on, a static tunnel is established between the AGW and the ILCR according to policies or configurations;

Wherein the tunnel between AGW and ILCR can be in many ways, such as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec etc., the present invention is not limited to any specific tunnel mode. When using MIP, the establishment and maintenance of tunnels are the same as those in existing WiMAX networks.

In step 702, the terminal is turned on, and the access authentication process of the terminal is performed through interaction between the base station, the AGW, the visited AAA server and the home AAA server. In this process, the home AAA server sends the static contracted IP address of the terminal to the AGW;

Step 703, the terminal initiates a service flow creation process. In this process, the preset service flow of the terminal can be created at the same time;

Step 704, the terminal acquires an IP address through a DHCP process. This IP address is the AID of the terminal;

Step 704a, during the process of obtaining the IP address, the AGW assigns a RID to the terminal. In the second embodiment, the RID points to the AGW. In the third embodiment, the RID points to the ILCR that has a static tunnel with the AGW. The AGW saves the terminal AID and RID mapping relationship;

Step 705, if the creation of the preset service flow has not occurred in step 703, it can be performed in this step. At this time, it is also possible to modify the initial service flow or the preset service flow.

Step 706, the AGW initiates the AID registration process with the terminal's home ILR, and registers the RID allocated by the AGW for the terminal;

Step 707: After receiving the registration request from the AGW, the home ILR saves the current AID-RID mapping relationship of the terminal.

At this point, the terminal has successfully connected to the network and can start to transmit data packets.

Step 708, the terminal transmits data packets with the communication counterpart.

Step 708a, after receiving the data message from the terminal and the communication peer, the AGW obtains the AID information in the message, establishes the connection information (mapping of AID1-AID2) between the terminal and the communication peer, and caches it locally. In this step, the AGW may first check the locally cached connection information between the terminal and the communication peer, and if there is no connection information between the terminal and the communication peer, then create and cache the connection information of the two.

When based on the communication network of Embodiment 2, after the AGW receives the data message sent by the terminal to the communication peer, it queries the AID-RID mapping information in the local cache according to the AID of the communication peer as the destination address in the data message, such as querying To the RID of the communication peer, the RID of the communication peer is used as the destination address, and the RID of the terminal is used as the source address, and is encapsulated in the data message (for example, it can be encapsulated in the newly added three-layer message header of the data message) ), then the encapsulated data message is forwarded to ILCR; if the RID of the communication peer is not found, the data message is tunnel-encapsulated and forwarded to the mapping forwarding plane, and the mapping management module is notified to query the RID of the communication peer.

After the AGW receives the data message from the communication peer, it strips off the RID encapsulated in the data message, restores the format of the data message sent by the communication peer, and sends it to the terminal through the connection between the AGW and the terminal.

The ILCR forwards the data packets with the RID format as the source address and the destination address in the AGW and the generalized forwarding plane.

When based on the communication network of Embodiment 3, after the AGW receives the data message sent by the base station (that is, the terminal connected to the ILCR), it queries the AID in the local cache according to the AID of the communication peer as the destination address in the data message -RID mapping information, if the RID of the communication peer is found, the RID of the communication peer is used as the destination address, and the address of the AGW is used as the source address, and is encapsulated in the data message (for example, it can be encapsulated in the data message newly added Layer 3 packet header), and then forward the encapsulated data packet to ILCR; if the RID of the communication peer is not found, tunnel the data packet and forward it to the mapping forwarding plane, and notify the mapping management module to query The RID of the communication peer.

After the AGW receives the data message from the ILCR, if the ILCR does not strip the RID encapsulated in the data message, remove the RID encapsulated in the data message, restore the format of the data message sent by the communication peer, It is sent to the terminal through the connection between the AGW and the terminal.

After receiving the data message from the external network, ILCR strips off the RID encapsulated in the data message, queries the AGW-AID-RID mapping information in the local cache according to the destination AID, and then forwards the data message to the terminal for access or query the AGW-AID-RID mapping information in the local cache according to the destination AID, replace the destination RID in the data message with the address of the AGW, and then forward the data message to the AGW accessed by the terminal.

After receiving the data message from the AGW, the ILCR queries the AGW-AID-RID mapping information in the local cache according to the source AID, replaces the AGW address in the source address with the RID of the terminal, and then forwards the data message.

On the basis of the fourth and fifth embodiments above, the flow chart of the terminal booting up to access the network, the terminal can be a traditional terminal, and the process in Figure 7 can also be used, except that the process of establishing a static tunnel in step 701 needs to be changed to a dynamic tunnel after step 704 At the same time, the authentication process to the AAA server will be triggered, such as step 505. Other steps are the same as those in Figure 7. It will not be described in detail here.

Fig. 8 is a flow chart of a terminal accessing the network based on the communication network in Embodiment 6, and the terminal may be a traditional terminal.

Figure 8 is applicable to the scenario where a dynamic tunnel is being established between the AGW and the ILCR. In this embodiment, a simple IP terminal (that is, a terminal that does not support mobile IP) is used as an example to illustrate the process of booting into the network. The specific steps are described as follows:

Step 801 to step 804 are the same as step 501 to step 504.

Step 805 is triggered by step 804. When establishing the tunnel between the AGW and the ILCR, the ILCR needs to authenticate with the home AAA server to obtain key information.

Step 806 is the same as step 506.

In step 807, the ILCR registers the RID assigned to the terminal by the ILCR with the AID registration process initiated by the home ILR.

There is no necessary sequence relationship between step 807 and step 806 .

Step 808 is the same as step 508.

Step 809, the terminal transmits data packets with the communication peer.

Step 809a is the same as step 509b.

Step 809b: After receiving the data message from the terminal and the communication peer, the ILCR obtains the AID information in the message, establishes the connection information (mapping of AID1-AID2) between the terminal and the communication peer, and caches it locally. In this step, the ILCR may first check the locally cached connection information between the terminal and the communication peer, and if there is no connection information between the terminal and the communication peer, then create and cache the connection information of the two.

Figure 5, Figure 6, Figure 7, and Figure 8 all take traditional simple IP terminals that do not support mobile IP as examples. For traditional mobile IP terminals, the process of booting up and entering the network is similar, except that the way to obtain the IP address of the terminal is changed from DHCP to It is a mobile IP mode, which will not be described in detail here.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Optionally, they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device and executed by a computing device, or they can be made into individual integrated circuit modules, or they can be integrated into Multiple modules or steps are fabricated into a single integrated circuit module to realize. As such, the present invention is not limited to any specific combination of hardware and software.

To simplify the description, the above description is not only applicable to the WiMAX network, but also applicable to other mobile communication networks. The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (50)

1. communication network that the identify label (AID) that realizes based on the Wimax network architecture separates with the position, comprise in the Wimax network architecture access business network be connected business network, comprise base station and IAD in the described access business network, it is characterized in that, comprise identity position core router (ILCR) and identity location register (ILR) in the described connection business network, this communication network also comprises the broad sense Forwarding plane that is used for opsition dependent sign (RID) route and transmits data message between ILCR, wherein:

Described IAD is used to terminal that access service and control are provided, and the link information of maintenance terminal and Correspondent Node cooperates the realization terminal to span into gateway and the switching of striding ILCR with other IADs;

Described ILCR is used for the session connection of maintenance terminal, for terminal distribution is pointed to the RID of this ILCR, the AID-RID map information of maintenance terminal and Correspondent Node is to the RID of ILR inquiry terminal, realize the route and the forwarding of data message, and cooperate the realization terminal to stride the switching of ILCR with other ILCR;

Described ILR is used to receive described IAD or the ILCR registration and unregistration request to this ILR home subscriber terminal, safeguard the AID-RID map information of home subscriber terminal, and receive query requests to terminal RID, the RID of this terminal AID correspondence in the request is returned to query requests side.

2. communication network as claimed in claim 1 is characterized in that, described IAD comprises: connect maintenance module and data forwarding module, wherein:

Described connection maintenance module is used to preserve the link information of terminal and Correspondent Node, comprises the corresponding relation of terminal AID and Correspondent Node AID; Know behind the terminal off-line or communicate by letter and stop the link information of back this terminal of deletion and Correspondent Node with Correspondent Node; Know the Correspondent Node off-line or cut out or delete when stopping the back link information of this Correspondent Node and terminal with terminal communication;

Described processed offline module is used for when determining the terminal off-line that inserts, and notice connects maintenance module; And when definite Correspondent Node off-line, notice connection maintenance module;

Described data forwarding module is used for carrying out data message forwarding between base station and ILCR.

3. communication network as claimed in claim 2 is characterized in that:

Processed offline module in the described IAD also is used for when determining the terminal off-line that inserts, this terminal off-line of IAD of notifying described Correspondent Node to insert, and when receiving the terminal off-line notice that the opposite end IAD sends, determine this terminal off-line as Correspondent Node;

Processed offline module in the described IAD is according to connecting the AID that the described link information of preserving in the maintenance module finds these all Correspondent Nodes of terminal, according to the AID of described Correspondent Node local or inquire the IAD of Correspondent Node access to Correspondent Node ownership place aaa server.

4. communication network as claimed in claim 1 or 2 is characterized in that, described ILCR comprises that the tunnel sets up module, mapping management module and packet forwarding module, wherein:

Described tunnel is set up module and is used to set up tunnel between IAD and the ILCR, is terminal distribution RID, and AID and this RID of terminal sent to the mapping management module;

Described mapping management module is used for the AID-RID map information of buffer memory terminal and Correspondent Node and safeguards;

Described packet forwarding module, after being used to receive that terminal and Correspondent Node do not belong to the uplink data messages of same ILCR, the RID of the Correspondent Node that will inquire from mapping management module or Correspondent Node ownership place ILR and the RID of terminal are encapsulated in the data message that comprises terminal AID and Correspondent Node AID together, through broad sense Forwarding plane route and be forwarded to opposite end ILCR; And, send to terminal after peelling off RID wherein with the downlink data message decapsulation that the broad sense Forwarding plane is sent.

5. communication network as claimed in claim 4 is characterized in that:

Also comprise the Register Cancel module, be used for after receiving terminal AID and being the RID of this terminal distribution, asking this terminal attaching ground ILR this terminal RID to be registered the AID of carried terminal and RID; After knowing the terminal off-line, ask this terminal attaching ground ILR to nullify the RID of this terminal;

Described Register Cancel module is arranged in IAD, and module is set up also with the AID of terminal with send to this Register Cancel module of IAD for terminal distribution RID in the tunnel among the described ILCR; Perhaps, described Register Cancel module is arranged in ILCR, and module is set up also with the AID of terminal with send to this Register Cancel module of this ILCR for terminal distribution RID in the tunnel among the described ILCR.

6. communication network as claimed in claim 4 is characterized in that:

Described ILCR also comprises the processed offline module, is used for when determining the terminal off-line that inserts notice mapping management module; When definite Correspondent Node off-line, notice mapping management module;

Mapping management module among the described ILCR also is used for when knowing the terminal off-line or cutting out, delete the AID-RID map information of this terminal, delete the AID-RID map information that does not have the Correspondent Node of correspondence in this terminal communication opposite end with the other-end that inserts this ILCR; Know terminal communicate by letter with Correspondent Node stop after, and this Correspondent Node do not have correspondence with the other-end that inserts this ILCR, then deletes the AID-RID map information of this Correspondent Node; The AID-RID information of knowing the Correspondent Node off-line or deleting this Correspondent Node when stopping with terminal communication.

7. communication network as claimed in claim 4 is characterized in that, described packet forwarding module comprises first retransmission unit and second retransmission unit, wherein:

First retransmission unit be used for receive that the base station sends comprise terminal AID and Correspondent Node AID and terminal and Correspondent Node and do not belong to the uplink data messages of same ILCR after, as inquire the RID of Correspondent Node in the mapping management module, the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address, through broad sense Forwarding plane route and be forwarded to opposite end ILCR; As the RID of inquiry less than Correspondent Node, to the RID of Correspondent Node ownership place ILR query communication opposite end, the AID-RID of the Correspondent Node that inquires is saved in the mapping management module;

Second retransmission unit is used for downlink data message decapsulation that the broad sense Forwarding plane of receiving is sent, peel off RID wherein after, mail to this terminal by ILCR with being connected of this terminal; And whether the AID-RID map information of judging Correspondent Node in the described data message exist in the mapping management module, then is saved in the mapping management module as not existing.

8. communication network as claimed in claim 7 is characterized in that:

Described connection business network also comprises packet forward function (PTF); After described first retransmission unit was received the uplink data messages of sending the base station, as inquire about the RID less than Correspondent Node in the mapping management module, RID was encapsulated in the data message as source address with this terminal, is forwarded to PTF; Described PTF is used for after receiving the data message that ILCR or other PTF send to, and after finding corresponding RID and be encapsulated in heading as destination address according to Correspondent Node AID in the data message, this data message is sent to opposite end ILCR through the broad sense Forwarding plane; Perhaps

After described first retransmission unit is received the uplink data messages of sending the base station, as inquire about RID in the mapping management module less than Correspondent Node, the described data message of elder generation's buffer memory, after inquiring the RID of Correspondent Node, again the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address, through broad sense Forwarding plane route and be forwarded to opposite end ILCR.

9. communication network as claimed in claim 2 is characterized in that:

Described IAD also comprises handover module and grappling datapath function (DPF) module, and described handover module is used for the control of the switching that terminal moves to another grappling DPF module or ILCR when having Correspondent Node coverage triggers, comprising:

The described unit that cuts out is used to realize control that terminal is cut out, this terminal of notice ILCR is switched, send to the incision IAD with connecting this terminal of maintenance module preservation and the link information of Correspondent Node, the data message forwarding of receiving between transfer period that sends to this terminal is to the incision IAD, and terminal cuts out the back notice and connects maintenance module;

Described incision unit is used to realize the control to the terminal incision, is saved in the link information of Correspondent Node and is connected maintenance module cutting out this terminal that IAD sends;

Described connection maintenance module also is used for knowing that terminal cuts out the link information of back this terminal of deletion and Correspondent Node.

10. communication network as claimed in claim 4 is characterized in that:

Described ILCR also comprises the switching controls module, is used for terminal moves to the switching that triggers another ILCR coverage when having Correspondent Node control, comprising:

Cut out control unit, be used to realize control that terminal is cut out, the incision ILCR that moves to terminal sends handoff request, and the data message forwarding of receiving between transfer period that sends to this terminal is given incision ILCR, cuts out back notice mapping management module in this terminal;

The incision control unit is used to realize the control to the terminal incision, for terminal distribution is pointed to the RID of this ILCR and AID and this RID of this terminal sent to the mapping management module, or sends to mapping management module and IAD; And, carry the AID-RID map information of this terminal to opposite end ILCR transmission terminal RID update notification;

Described mapping management module is managed together to the Correspondent Node of all terminals of inserting this ILCR, receive the terminal RID update notification of sending the opposite end after, upgrade the AID-RID map information of local this terminal of preserving.

11. communication network as claimed in claim 10 is characterized in that:

When described incision control unit sends terminal RID update notification to opposite end ILCR, find the AID of these all Correspondent Nodes of terminal earlier to the connection maintenance module of IAD according to the AID of this terminal, arrive the RID of mapping management module searches then, send terminal RID update notification to opposite end ILCR according to the RID that finds to described Correspondent Node; Perhaps

The incision control unit of described ILCR also is used for sending terminal RID update notification to the IAD of the same side, the incision unit of described IAD also is used for terminal RID update notification is sent to the opposite end IAD, and is forwarded to ILCR after receiving the terminal RID update notification that the opposite end IAD transmits.

12. communication network as claimed in claim 4 is characterized in that:

After data forwarding module in the described IAD was received data message, whether terminal AID had been kept at the corresponding relation of Correspondent Node AID and has been connected maintenance module in the judgment data message, connected in the maintenance module as not preserving then to add to; Perhaps

After packet forwarding module among the described ILCR was received data message, whether terminal AID had been kept at the corresponding relation of Correspondent Node AID and has been connected maintenance module in the judgment data message, preserved as not preserving the connection maintenance module that then is sent to IAD.

13. communication network as claimed in claim 1 is characterized in that:

Described ILR preserves or upgrades the AID-RID map information of this terminal after receiving the register requirement of home subscriber terminal, it is invalid to receive after the de-registration request of home subscriber terminal the AID-RID map information of this terminal being deleted or is changed to; If receive registration, de-registration request, then be transmitted to this terminal attaching ground ILR and handle the non-attribution user terminal.

14. communication network as claimed in claim 1 is characterized in that:

Described ILCR is a function of having gathered home agent in the Wimax network architecture and/or core router, and has expanded and realized that identify label separates with the position that required new function obtains; Described connection business network also comprises the original network element that is used for authentication in the Wimax network architecture;

Described IAD is on the basis of the functional entity that IAD has in the Wimax network architecture, expanded and realized that identify label separates with the position that required new functional module obtains, the functional entity that IAD had in the described Wimax network architecture comprises grappling datapath function (DPF) module and authentication device.

15. communication network as claimed in claim 1 is characterized in that:

Tunnel among the described ILCR is set up module and is adopted the mode of dynamically setting up the tunnel, and the tunnel based on terminal is set up in the tunnel in the terminal access procedure between IAD and ILCR.

16. communication network that the identify label (AID) that realizes based on the Wimax network architecture separates with the position, comprise in the Wimax network architecture access business network be connected business network, comprise base station and IAD in the described access business network, it is characterized in that, comprise identity position core router (ILCR) and identity location register (ILR) in the described connection business network, this communication network also comprises the broad sense Forwarding plane that is used for opsition dependent sign (RID) route and transmits data message between ILCR, wherein:

Described ILCR is used to terminal distribution to point to the RID of this ILCR, RID to the ILR registration of terminal attaching ground, cancellation and inquiry terminal, the link information of maintenance terminal and Correspondent Node, the session connection of maintenance terminal, the AID-RID map information of maintenance terminal and Correspondent Node, realize the route and the forwarding of data message, and cooperate the realization terminal to stride the switching of ILCR with other ILCR;

Described ILR is used to receive the registration and unregistration request to this ILR home subscriber terminal, safeguards the AID-RID map information of home subscriber terminal, and receives the query requests to terminal RID, and the RID of this terminal AID correspondence in the request is returned to query requests side.

17. communication network as claimed in claim 16 is characterized in that, described ILCR comprises that the tunnel sets up module, Register Cancel module, mapping management module and packet forwarding module:

Described tunnel is set up module and is used to set up tunnel between IAD and the ILCR, is terminal distribution RID, and AID and this RID of terminal sent to mapping management module and Register Cancel module;

Described Register Cancel module is used for asking this terminal attaching ground ILR this terminal RID to be registered the AID of carried terminal and RID after receiving terminal AID and being the RID of this terminal distribution; After knowing the terminal off-line, ask this terminal attaching ground ILR to nullify the RID of this terminal;

Described mapping management module is used for the AID-RID map information of buffer memory terminal and Correspondent Node and safeguards;

Described packet forwarding module, after being used to receive that terminal and Correspondent Node do not belong to the uplink data messages of same ILCR, the RID of the Correspondent Node that will inquire from mapping management module or Correspondent Node ownership place ILR and the RID of terminal are encapsulated in the data message that comprises terminal AID and Correspondent Node AID together, through broad sense Forwarding plane route and be forwarded to opposite end ILCR; And, send to terminal after peelling off RID wherein with the downlink data message decapsulation.

18. communication network as claimed in claim 17 is characterized in that, described ILCR also comprises connection maintenance module, processed offline module and mapping management module, wherein:

Described connection maintenance module, the link information that is used to preserve terminal and Correspondent Node; Know the terminal off-line or shift out the back or communicate by letter and stop the link information of back this terminal of deletion and Correspondent Node with Correspondent Node; After knowing the Correspondent Node off-line or stopping, delete the link information of this Correspondent Node and terminal with terminal communication;

Described processed offline module is used for when determining the terminal off-line that inserts, and notifies Register Cancel module, mapping management module and is connected maintenance module; When definite Correspondent Node off-line, notice mapping management module and be connected maintenance module;

Described mapping management module also is used for deleting the AID-RID map information that does not have the Correspondent Node of correspondence in this terminal communication opposite end with the other-end that inserts this ILCR knowing that terminal cuts out or during off-line, deleting the AID-RID map information of this terminal; Know terminal communicate by letter with Correspondent Node stop after, and this Correspondent Node do not have correspondence with the other-end that inserts this ILCR, then deletes the AID-RID map information of this Correspondent Node; Know the Correspondent Node off-line or when stopping, the AID-RID information of deleting this Correspondent Node with terminal communication.

19. communication network as claimed in claim 18 is characterized in that:

Described processed offline module is when definite Correspondent Node off-line, also according to terminal AID to connecting the AID that finds these all Correspondent Nodes of terminal in the maintenance module, inquire the RID of all Correspondent Nodes to the mapping management module again, send terminal off-line notice to opposite end ILCR then;

Described processed offline module is determined this terminal off-line as Correspondent Node after receiving the terminal off-line notice that opposite end ILCR sends.

20., it is characterized in that described packet forwarding module comprises first retransmission unit and second retransmission unit as claim 17 or 18 or 19 described communication networks, wherein:

First retransmission unit be used for receive that IAD sends comprise terminal AID and Correspondent Node AID and this terminal and Correspondent Node and do not belong to the uplink data messages of same ILCR after, as inquire the RID of Correspondent Node in the mapping management module, the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address, through broad sense Forwarding plane route and be forwarded to opposite end ILCR; As the RID of inquiry, to the RID of Correspondent Node ownership place ILR query communication opposite end less than Correspondent Node;

Second retransmission unit is used for downlink data message decapsulation that the broad sense Forwarding plane of receiving is sent, peels off RID wherein, mails to this terminal by ILCR with being connected of this terminal.

21. communication network as claimed in claim 20 is characterized in that:

Described connection business network also comprises packet forward function (PTF); After described first retransmission unit receives that the terminal that sends the base station and Correspondent Node do not belong to the uplink data messages of same ILCR, as inquire about RID in the mapping management module less than Correspondent Node, RID is encapsulated in the data message as source address with this terminal, is forwarded to this Correspondent Node ownership place PTF; Described PTF is used for after receiving the data message that ILCR or other PTF send to, and after finding corresponding RID and be encapsulated in heading as destination address according to Correspondent Node AID in the data message, this data message is sent to opposite end ILCR through the broad sense Forwarding plane; Perhaps

After described first retransmission unit receives that the terminal that sends the base station and Correspondent Node do not belong to the uplink data messages of same ILCR, as inquire about RID in the mapping management module less than Correspondent Node, the described data message of elder generation's buffer memory, after inquiring the RID of Correspondent Node, again the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address, through broad sense Forwarding plane route and be forwarded to opposite end ILCR.

22. communication network as claimed in claim 20 is characterized in that:

The AID-RID map information that described first retransmission unit also is used for the Correspondent Node that will inquire is saved in the mapping management module;

Described second retransmission unit judges also whether the AID-RID map information of Correspondent Node in the described data message exists after receiving the downlink data message that the broad sense Forwarding plane sends in the mapping management module, then be saved in the mapping management module as not existing;

Described first retransmission unit and second retransmission unit judge also whether terminal AID has been kept at the corresponding relation of Correspondent Node AID in the data message of receiving and be connected in the maintenance module, as do not have, and is saved in to connect in the maintenance module.

23., it is characterized in that as claim 17 or 18 or 19 described communication networks, also comprise the switching controls module, this switching controls module comprise again cut out control unit and the incision control unit, wherein:

The described control unit that cuts out is used to realize control that terminal is cut out, when terminal moves, determine the incision ILCR that terminal will move to according to the destination of moving, move to finish back notice mapping management module and to be connected this terminal of maintenance module and cut out, the data message forwarding of receiving between transfer period that mails to this terminal arrives cuts ILCR;

Described incision control unit, be used to realize control to the terminal incision,,, AID and this RID of this terminal sent to the Register Cancel module and be saved in the mapping management module when another ILCR moves to the coverage of this ILCR in terminal for terminal distribution is pointed to the RID of this ILCR;

24. communication network as claimed in claim 23 is characterized in that:

Described incision control unit also is used to inquire about the positional information of opposite end ILCR, sends terminal RID update notification to opposite end ILCR, carries the AID-RID map information of this terminal; During inquiry, find earlier the AID of all Correspondent Nodes in the link information that connects terminal that maintenance module preserves and Correspondent Node according to terminal AID, find corresponding RID with the AID that finds in the Correspondent Node AID-RID map information of mapping management module preservation again, the RID that finds is the positional information of opposite end ILCR;

Described mapping management module is managed together to the Correspondent Node of all terminals of inserting this ILCR, receive the terminal RID update notification of sending the opposite end after, upgrade the AID-RID map information of local this terminal of preserving.

25. communication network as claimed in claim 16 is characterized in that:

Described ILR preserves or upgrades the AID-RID map information of this terminal after receiving the register requirement of home subscriber terminal, it is invalid to receive after the de-registration request of home subscriber terminal the AID-RID map information of this terminal being deleted or is changed to; If receive registration, de-registration request, then be transmitted to this terminal attaching ground ILR and handle the non-attribution user terminal.

26. communication network as claimed in claim 16 is characterized in that:

Described ILCR is a function of having gathered home agent in the Wimax network architecture and/or core router, and has expanded and realized that identify label separates with the position that required new function obtains; Described connection business network also comprises the original network element that is used for authentication in the Wimax network architecture;

27. communication network that the identify label (AID) that realizes based on the Wimax network architecture separates with the position, comprise in the Wimax network architecture access business network be connected business network, comprise base station and IAD in the described access business network, it is characterized in that, comprise identity location register (ILR) in the described connection business network, this communication network also comprises the broad sense Forwarding plane that is used for opsition dependent sign (RID) route and transmits data message, wherein:

Described IAD is used to terminal that access service and control are provided, be terminal distribution RID, RID to the ILR registration of terminal attaching ground, cancellation and inquiry terminal, the link information of maintenance terminal and Correspondent Node, the AID-RID map information of maintenance terminal and Correspondent Node, realize the route and the forwarding of data message, and cooperate the realization terminal to span into the switching of gateway with other IADs;

Described ILR is used to receive the registration and unregistration request to this ILR home subscriber terminal, safeguards the AID-RID map information of home subscriber terminal, and receives the query requests to terminal RID, and the RID of this terminal AID correspondence in the request is returned to query requests side.

28. communication network as claimed in claim 27 is characterized in that, described IAD comprises RID distribution module, Register Cancel module, mapping management module and data forwarding module, wherein:

Described RID distribution module is used for inserting or the terminal cut process is terminal distribution RID in terminal request, and the AID of this RID and this terminal is sent to mapping management module and Register Cancel module;

Described Register Cancel module is used for receiving terminal AID and this terminal RID being registered the AID of carried terminal and RID to this terminal attaching ground ILR for behind the RID of this terminal distribution; After knowing the terminal off-line, ask this terminal attaching ground ILR to nullify the RID of this terminal;

Described mapping management module is used for the AID-RID map information of buffer memory terminal and Correspondent Node and safeguards;

Described data forwarding module, be used for after receiving uplink data messages, when terminal therein and Correspondent Node do not belong to same ILCR, to be encapsulated in the data message that comprises terminal AID and Correspondent Node AID from the Correspondent Node RID that mapping management module or Correspondent Node ownership place ILR inquire, be forwarded to the ILCR that sets up the tunnel with it; And be used for the downlink data message decapsulation is sent to terminal.

29. communication network as claimed in claim 28 is characterized in that, described IAD also comprises connection maintenance module and processed offline module, wherein:

Described connection maintenance module, the link information that is used to preserve terminal and Correspondent Node; Know the terminal off-line or shift out the back or communicate by letter and stop the link information of back this terminal of deletion and Correspondent Node with Correspondent Node; After knowing the Correspondent Node off-line or stopping, delete the link information of this Correspondent Node and terminal with terminal communication;

Described processed offline module is used for after determining to insert the terminal off-line of this IAD, notice Register Cancel module, connection maintenance module and mapping management module; When definite Correspondent Node off-line, notice connects maintenance module and mapping management module;

Described mapping management module is deleted the AID-RID map information that does not have the Correspondent Node of correspondence in this terminal communication opposite end with the other-end that inserts this IAD knowing that terminal cuts out or during off-line, deleting the AID-RID map information of this terminal; Know terminal communicate by letter with Correspondent Node stop after, and this Correspondent Node do not have correspondence with the other-end that inserts this ILCR, then deletes the AID-RID map information of this Correspondent Node; Know the Correspondent Node off-line or when stopping, the AID-RID information of deleting this Correspondent Node with terminal communication.

30. communication network as claimed in claim 29 is characterized in that:

Described RID distribution module is pointed to this IAD for terminal distribution RID; When described processed offline module is determined the Correspondent Node off-line, also according to terminal AID to connecting the AID that finds these all Correspondent Nodes of terminal in the maintenance module, inquire the RID of all Correspondent Nodes to the mapping management module again, send terminal off-line notice to the opposite end IAD then, carry the AID of this terminal; And after receiving the terminal off-line notice that the opposite end IAD is sent, determine this terminal off-line as Correspondent Node; Perhaps

Described RID distribution module is pointed to ILCR for terminal distribution RID; When described processed offline module is determined the Correspondent Node off-line, also according to terminal AID to connecting the AID that finds these all Correspondent Nodes of terminal in the maintenance module, again from this locality or the server lookup of Correspondent Node AAA ownership place to the positional information of opposite end IAD, send terminal off-line notice to the opposite end IAD then, carry the AID of this terminal; And after receiving the terminal off-line notice that the opposite end IAD is sent, determine this terminal off-line as Correspondent Node.

31. communication network as claimed in claim 28 is characterized in that:

Described IAD also comprises handover module, is used for moving to when terminal the control of the switching that triggers another IAD coverage, comprising:

Cut out the unit and be used to realize cutting out of terminal, the data message forwarding of receiving between transfer period that mails to this terminal is to the incision IAD, notice connected maintenance module after switching was finished, and caused the IAD or the ILCR of terminal RID sensing to change if switch, and also notified the mapping management module.Alternatively, the link information of this terminal and Correspondent Node and/or the AID-RID map information of this terminal communication opposite end are sent to the preservation of incision IAD;

The incision unit is used to realize the incision of terminal, if switching the IAD or the ILCR that cause terminal RID to point to changes, be the new RID of terminal distribution, the AID-RID map information that this terminal is new is saved in the mapping management module, and this terminal AID and newly assigned RID are sent to the Register Cancel module.

32. communication network as claimed in claim 27 is characterized in that:

Described access business network has the data surface interface with the broad sense Forwarding plane; Described data forwarding module comprises:

First retransmission unit, be used to receive that the base station sends comprises terminal AID and Correspondent Node AID, and after this terminal and Correspondent Node do not belong to the uplink data messages of same ILCR, as inquiring the RID of Correspondent Node in the mapping management module, the RID of this terminal and Correspondent Node is encapsulated in as source, destination address sends to the broad sense Forwarding plane in the data message; As the RID of inquiry, to the RID of Correspondent Node ownership place ILR query communication opposite end less than Correspondent Node;

Second retransmission unit is used for downlink data message decapsulation that the broad sense Forwarding plane is sent, peel off RID wherein after, by this IAD and being connected of this terminal mailing to this terminal.

33. communication network as claimed in claim 27 is characterized in that,

Comprise identity position core router (ILCR) in the described connection business network, be used for the session connection of maintenance terminal, set up the tunnel between IAD and the ILCR, and forwarding is the data message of source address and destination address with the RID form between broad sense Forwarding plane and IAD;

The RID distribution module of described IAD is that the RID of terminal distribution points to this IAD; Described data forwarding module comprises:

First retransmission unit, be used for comprising terminal AID and Correspondent Node AID what receive that the base station sends, and after this terminal and Correspondent Node do not belong to the uplink data messages of same ILCR, as inquire the RID of Correspondent Node in the mapping management module, the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address, is forwarded to ILCR after doing tunnel encapsulation; As the RID of inquiry, to the RID of Correspondent Node ownership place ILR query communication opposite end less than Correspondent Node;

Second retransmission unit is used for downlink data message decapsulation that ILCR is sent, peel off RID and tunnel encapsulation wherein after, by this IAD and being connected of this terminal mailing to this terminal.

34. communication network as claimed in claim 33 is characterized in that:

The dynamic tunnel of setting up between described IAD (AGW) and ILCR that is based on terminal; Perhaps

What set up between described IAD (AGW) and ILCR is static tunnel, described ILCR also is used for the AGW-AID-RID map information of foundation back, the tunnel buffer memory terminal between IAD and ILCR and safeguards, and move to the coverage of another ILCR in terminal after, delete the AGW-AID-RID map information of this terminal.

35. communication network as claimed in claim 27 is characterized in that,

Comprise identity position core router (ILCR) in the described connection business network, be used for the session connection of maintenance terminal, set up the tunnel between IAD and the ILCR, and forwarding is the data message of source address and destination address with the RID form between broad sense Forwarding plane and IAD;

The RID distribution module of described IAD is that the RID of terminal distribution points to the ILCR that sets up the tunnel with this IAD; Described data forwarding module comprises:

First retransmission unit, be used to receive that the base station sends comprises terminal AID and Correspondent Node AID, and after this terminal and Correspondent Node do not belong to the uplink data messages of same ILCR, as inquire the RID of Correspondent Node in the mapping management module, with this terminal RID or this access gateway address as source address, Correspondent Node RID is encapsulated in the data message as destination address, is forwarded to ILCR after doing tunnel encapsulation; As the RID of inquiry, to the RID of Correspondent Node ownership place ILR query communication opposite end less than Correspondent Node;

Second retransmission unit, be used for downlink data message decapsulation that ILCR is sent, peel off wherein RID and tunnel encapsulation, perhaps peel off wherein RID, access gateway address and tunnel encapsulation, after perhaps peelling off tunnel encapsulation wherein, by this IAD and being connected of this terminal mailing to this terminal.

36. communication network as claimed in claim 35 is characterized in that,

The dynamic tunnel of setting up between described IAD (AGW) and ILCR that is based on terminal; Perhaps

What set up between described IAD (AGW) and ILCR is static tunnel, and described ILCR comprises packet forwarding module, and this packet forwarding module comprises again:

First retransmission unit, be used for after receiving that terminal that IAD is sent and Correspondent Node do not belong to the uplink data messages of same ILCR, according to the AGW-AID-RID map information in the source AID inquiry local cache, after terminal RID will being replaced with as the access gateway address of source address and peelling off tunnel encapsulation, be transmitted to mapping Forwarding plane or broad sense Forwarding plane;

Second retransmission unit, be used for after receiving the downlink data message that the broad sense Forwarding plane is sent, according to the AGW-AID-RID map information in the purpose AID inquiry local cache, after purpose RID in the data message replaced with access gateway address and do tunnel encapsulation, be forwarded to the IAD that this terminal inserts; Perhaps after receiving the downlink data message that the broad sense Forwarding plane is sent, peel off the RID that encapsulates in the data message and do tunnel encapsulation, according to the AGW-AID-RID map information in the purpose AID inquiry local cache, with the IAD of data message forwarding to this terminal access.

37., it is characterized in that as the described communication network of arbitrary claim in the claim 32 to 36:

Described connection business network also comprises packet forward function (PTF); After first retransmission unit in the described IAD receives that the terminal that sends the base station and Correspondent Node do not belong to the uplink data messages of same ILCR, as inquire about RID in the mapping management module less than Correspondent Node, RID is encapsulated in the data message with this terminal, is forwarded to this Correspondent Node ownership place PTF; Perhaps be encapsulated in data message as source address this terminal RID and after doing tunnel encapsulation, be forwarded to this Correspondent Node ownership place PTF;

Described PTF is used for after receiving the data message that ILCR or other PTF send to, after finding corresponding RID and be encapsulated in heading according to Correspondent Node AID in the data message, this data message is sent to opposite end ILCR or opposite end IAD through the broad sense Forwarding plane as destination address.

38., it is characterized in that as the described communication network of arbitrary claim in the claim 32 to 36:

After first retransmission unit in the described IAD receives that the terminal that sends the base station and Correspondent Node do not belong to the uplink data messages of same ILCR, as inquire about RID in the mapping management module less than Correspondent Node, the described data message of elder generation's buffer memory, after inquiring the RID of Correspondent Node, again the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address, is forwarded to ILCR or directly sends to the broad sense Forwarding plane after doing tunnel encapsulation.

39., it is characterized in that as the described communication network of arbitrary claim in the claim 32 to 36:

The AID-RID map information that first retransmission unit in the described IAD also is used for the Correspondent Node that will inquire is saved in the mapping management module;

After second retransmission unit in the described IAD is received downlink data message, judge also whether the AID-RID map information of Correspondent Node in the described data message exists in the mapping management module, then be saved in the mapping management module as not existing;

First retransmission unit in the described IAD and second retransmission unit judge also whether terminal AID has been kept at the corresponding relation of Correspondent Node AID in the data message of receiving and be connected in the maintenance module, as do not have, and is saved in to connect in the maintenance module.

40. communication network as claimed in claim 31 is characterized in that:

The incision unit of described IAD also is used to inquire about the positional information of opposite end IAD, sends terminal RID update notification to all opposite end IADs, carries the new AID-RID map information of this terminal;

Mapping management module in the described IAD also is used to receive the AID-RID map information that upgrades local this terminal of preserving after the terminal RID update notification of sending the opposite end.

41. communication network as claimed in claim 27 is characterized in that:

Described IAD is on the basis of the functional entity that IAD has in the Wimax network architecture, expanded and realized that identify label separates with the position that required new functional module obtains, the functional entity that IAD had in the described Wimax network architecture comprises grappling datapath function (DPF) module and authentication device.

42. a starting up of terminal inserts the method as communication network as described in claim 1 or 16, comprising:

Behind the starting up of terminal, carry out access authentication and initial service flow and create, obtain identify label (AID) from IAD then;

Initiate in the process of tunnel foundation to identity position core router (ILCR) at described IAD, described ILCR points to the station location marker (RID) of this ILCR for this terminal distribution, preserve the map information of this terminal AID and RID, and will be notified to described IAD for the RID of terminal distribution;

Described IAD or ILCR initiate register requirement to this terminal attaching ground ILR behind the AID and RID that obtain this terminal, carry the AID and the RID of this terminal; After this ILR receives this register requirement, and preserve the current AID-RID mapping relations of this terminal.

43. method as claimed in claim 42 is characterized in that:

The AID that described terminal is obtained from described IAD is the access authentication flow process of this terminal, is handed down to described IAD by this terminal attaching ground aaa server.

44., it is characterized in that as claim 42 or 43 described methods:

Described terminal is by DHCP (DHCP) flow process or obtains the AID of described terminal by mobile IP mode from IAD, the static ip address that this AID distributes during for this terminal unit contractual.

45., it is characterized in that as claim 42 or 43 described methods:

In the process that described tunnel is set up, described ILCR also authenticates to this terminal attaching ground aaa server, obtains key information.

46. a starting up of terminal inserts the method as communication network as described in the claim 27, comprising:

Behind the starting up of terminal, carry out access authentication and initial service flow and create the identify label (AID) of obtaining described terminal then from IAD;

Described IAD is this terminal distribution station location marker (RID), preserves the map information of this terminal AID and RID, and sends register requirement to the ILR on described terminal attaching ground, carries the AID and the RID of this terminal;

After this ILR receives this register requirement, and preserve the current AID-RID mapping relations of described terminal.

47. method as claimed in claim 46 is characterized in that:

The AID that described terminal is obtained from described IAD is the access authentication flow process of terminal, is handed down to described IAD by this terminal attaching ground aaa server.

48. method as claimed in claim 46 is characterized in that:

Described terminal is to obtain the AID of this terminal by DHCP (DHCP) flow process or by mobile IP mode from IAD, the static ip address that this AID distributes during for this terminal unit contractual.

49., it is characterized in that as claim 46 or 47 or 48 described methods:

Be to obtain in the process of AID to this IAD in described terminal, triggering described IAD is described terminal distribution RID's.

50., it is characterized in that as claim 46 or 47 or 48 described methods:

What set up between described IAD and the ILCR is static tunnel, and described IAD is that the AID of described terminal distribution points to this IAD or points to the ILCR that establishes static tunnel with it; Perhaps

The dynamic tunnel of setting up between described IAD and the ILCR that is based on terminal, described IAD are that the AID of described terminal distribution points to this IAD.

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