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WO2017128315A1 - Method and device for creating link - Google Patents

Method and device for creating link Download PDF

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Publication number
WO2017128315A1
WO2017128315A1 PCT/CN2016/072863 CN2016072863W WO2017128315A1 WO 2017128315 A1 WO2017128315 A1 WO 2017128315A1 CN 2016072863 W CN2016072863 W CN 2016072863W WO 2017128315 A1 WO2017128315 A1 WO 2017128315A1
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WO
WIPO (PCT)
Prior art keywords
access node
link
processing entity
signaling processing
interface signaling
Prior art date
Application number
PCT/CN2016/072863
Other languages
French (fr)
Chinese (zh)
Inventor
银宇
戚彩霞
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2016/072863 priority Critical patent/WO2017128315A1/en
Publication of WO2017128315A1 publication Critical patent/WO2017128315A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present invention relates to the field of mobile communications technologies, and in particular, to a method and apparatus for creating a link.
  • the S1 interface is an access node (Evolved Node B, an evolved Node B, a base station in an LTE system) and a mobility management network element (for example, the mobility management network element may be mobile) in an LTE (Long Term Evolution) system.
  • Management entity English: Mobility Management Entity, referred to as: MME) communication interface.
  • MME Mobility Management Entity
  • the user terminal Before the data of the user terminal is transmitted to the packet core network, the user terminal first establishes a connection with the access node, and then accesses the mobility management network element through the access node, and establishes an S1 interface flow control transmission between the access node and the mobility management network element.
  • the protocol (English: Stream Control Transmission Protocol, SCTP for short) is connected to the S1 application protocol (S1 Application Protocol, S1-AP for short).
  • the S1 interface link is released between the access node and the mobility management network element, and the user terminal is released to the idle state.
  • the mobile management network element needs to initiate paging for the user terminal.
  • the mobile management network element performs paging by locating the cell where the user terminal may be located in the registration area of the user terminal, and the registration area is called a Tracking Area List (TA List), and is composed of one or more tracking areas (Tracking). Area, TA) composition.
  • TA List Tracking Area List
  • the user signaling processing entity in the mobility management network element needs to query all access nodes corresponding to the registration area of the user terminal, and the interface signaling processing entity in the system that establishes a connection with the access node, and process the signaling through the interface.
  • the entity sends a paging message to the corresponding access node.
  • the user signaling processing entity needs to send messages to 100 interface signaling processing entities, and these interface signaling processing
  • the entity sends a paging message to the 200 access nodes in the registration area.
  • the paging management process requires a total of 300 paging messages.
  • the paging message between the internal modules of the mobility management network element may reach one million levels per second, and the mobility management network element also needs to process millions of levels.
  • the paging message between the other access nodes and the access node will consume a large amount of resources of the mobility management network element, thereby causing the execution efficiency of the mobility management network element to be low.
  • the mobile management network element allocates an interface signaling processing entity to the access node in the above-mentioned conventional technology, and the technical efficiency is low.
  • a method of creating a link is proposed.
  • the first aspect of the embodiment of the present invention discloses a method for creating a link, including:
  • the notifying the access node to re-establish the underlying link further includes:
  • the application layer connection establishment reject message includes a reconnection identifier, where the reconnection identifier is used to instruct the access node to reestablish an underlying link.
  • the method further includes:
  • the assigning, by the access node, the second interface signaling processing entity corresponding to the first location area includes:
  • the notifying the access node to re-establish the underlying link further includes:
  • an application layer connection establishment reject message where the application layer connection establishment reject message includes the token identifier, and the access node initiates an underlying link creation request when reestablishing the underlying link
  • the token identifier is included in the file.
  • the acquiring the second interface signaling corresponding to the access node Processing entities also include:
  • the access node is allocated to the first location area
  • the second interface signaling processing entity includes:
  • the acquiring the second interface signaling processing entity corresponding to the access node further includes:
  • the method further includes:
  • the identifier of the access node is The internetworking protocol IP address of the access node.
  • the method further includes:
  • the method further includes:
  • the notifying the access node before rebuilding the underlying link further includes:
  • the mobility management network element allocates an interface signaling processing entity to the access node in the above-mentioned conventional technology, and the technical efficiency is low.
  • a device for creating a link is proposed.
  • the second aspect of the embodiment of the present invention discloses an apparatus for creating a link, including:
  • a request receiving module configured to receive an underlying link creation request sent by the access node
  • a temporary link establishing module configured to allocate a first interface signaling processing entity to the access node, and establish, by using the first interface signaling processing entity, a temporary underlying link with the access node, by using the temporary Receiving an application layer connection establishment request sent by the access node, the application layer connection
  • the first location area is included in the connection establishment request;
  • a second interface allocation module configured to allocate, by the access node, a second interface signaling processing entity corresponding to the first location area, to notify the access node to re-establish an underlying link, where the reconstructed underlying link is The underlying link created by the entity is processed by the second interface signaling.
  • the second interface allocation module is further configured to return an application layer connection establishment reject message to the access node.
  • the application layer connection establishment reject message includes a reconnection identifier, where the reconnection identifier is used to instruct the access node to reestablish the underlying link.
  • the device further includes a second interface acquiring module, configured to acquire a corresponding to the access node
  • the second interface signaling processing entity establishes an underlying link with the access node by using the second interface signaling processing entity when the second interface signaling processing entity has been allocated to the access node.
  • the second interface allocation module is configured to generate the second The interface signaling processing entity corresponding to the token identifier; and returning an application layer connection establishment reject message to the access node, where the application layer connection establishment reject message includes the token identifier, and the access node is reconstructed
  • the underlying link includes the token identifier in the initiated underlying link creation request.
  • the second interface acquiring module is further configured to obtain the bottom chain
  • the token identifier included in the path creation request is used to find or calculate a second interface signaling processing entity corresponding to the access node according to the token identifier.
  • the second interface allocation module is configured to acquire the access node And an identifier that stores a mapping relationship between the identifier of the access node and the allocated second interface signaling processing entity;
  • the second interface obtaining module is further configured to search for the access node according to the mapping relationship. Identify a corresponding second interface signaling processing entity.
  • the apparatus further includes a location area And an update module, configured to receive the uploaded location area update request, obtain the second location area according to the location area update request, and re-allocate the second interface signaling processing entity to the access node according to the second location area, and notify the The access node rebuilds the underlying link.
  • the second interface allocation module The identifier for obtaining the first location area, and the second interface signaling processing entity is allocated by the access node according to a value obtained by modulating the identifier.
  • the identifier of the access node The Internet Protocol IP address of the access node.
  • the apparatus further includes paging a module, configured to acquire a registration area of the target user terminal UE, and find an interface signaling processing entity corresponding to the registration area, and initiate a paging corresponding to the target UE to the searched interface signaling processing entity. request.
  • paging a module configured to acquire a registration area of the target user terminal UE, and find an interface signaling processing entity corresponding to the registration area, and initiate a paging corresponding to the target UE to the searched interface signaling processing entity. request.
  • the apparatus further includes a node capability Notification message receiving module for
  • the second interface allocation module is configured to notify the access node to reestablish an underlying link when the access node supports a reestablished link.
  • the mobility management network element after receiving the underlying link creation request initiated by the access node, the mobility management network element does not directly allocate an interface signaling processing entity for creating data for transmitting data.
  • the underlying link but first assigns a temporary first interface signaling processing entity to the access node, and then creates a temporary underlying link through the temporary first interface signaling processing entity, and obtains the temporary underlying link.
  • the first location area that is sent by the access node when the application layer is created, and then the second interface signaling processing entity corresponding to the first location area is re-assigned to the access node according to the first location area, and the access is notified.
  • the node rebuilds the underlying link.
  • the mobility management network element can establish a stable underlying link for transmitting data through the allocated second interface signaling processing entity and the access node.
  • the mobile management network element can quickly find one or a few interface signaling processing entities corresponding to the location area according to the location area, and when the mobility management network element pages the UE in the idle state according to the service requirement, The paging request can be sent only to the one or a few interface signaling processing entities, thereby greatly reducing unnecessary paging times and improving system execution efficiency.
  • FIG. 1 is a schematic diagram of an EPS network architecture in a conventional technology
  • 2 is an interface protocol stack between an access node and a mobility management entity MME in the conventional technology
  • FIG. 3 is a timing diagram of a process of establishing an S1-AP connection in the conventional art
  • FIG. 4 is a flowchart of a method for creating a link according to an embodiment of the present invention.
  • FIG. 5 is a timing diagram of a process for establishing an S1-AP connection according to an embodiment of the present invention
  • FIG. 6 is a timing diagram of another process for establishing an S1-AP connection according to an embodiment of the present invention.
  • FIG. 7 is a sequence diagram of an access node uploading node capability notification message according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an apparatus for creating a link according to an embodiment of the present invention.
  • FIG. 1 is a network architecture diagram of a mobile communication network of an LTE system, and the mobile communication network is a packet system (English: Evolved Packet System, abbreviated as: EPS).
  • the user terminal UE is accessed by the local access node, and the access node is an evolved NodeB (English: evolved NodeB, e.g., eNodeB).
  • the Mobility Management Entity (MME) is responsible for the location management, connection management, security authentication, and gateway selection of the user terminal UE.
  • the service gateway (English: Serving Gateway, Chinese: SGW) is the local access gateway of the user terminal UE, and is responsible for access technology related connection management and data forwarding.
  • a data gateway (English: Packet Data Network Gateway, Chinese: PGW) is a gateway for a user terminal to access an external data network.
  • FIG. 2 shows an interface protocol between an access node and a mobility management entity in a conventional technology, and uses a Stream Control Transmission Protocol (SCTP) and an S1 application protocol. :S1Application Protocol, referred to as: S1-AP).
  • SCTP Stream Control Transmission Protocol
  • S1-AP Application Protocol
  • FIG. 3 illustrates a link establishment process between an access node eNodeB and a mobility management entity MME in the conventional art.
  • the link routing entity, the interface signaling processing entity, and the user signaling processing entity are all logically divided functional modules in the mobility management entity MME.
  • Step 1 The access node eNodeB initiates SCTP link establishment, and sends an SCTP initial message to the mobility management entity MME.
  • Step 2 After receiving the message, the link routing entity of the mobility management entity MME randomly selects an interface signaling processing entity to establish an SCTP link according to the principle of load sharing.
  • the interface signaling processing entity is a connection interface corresponding to the access node eNodeB.
  • Step 3 The interface signaling processing entity of the mobility management entity MME returns a message such as an initial response of the SCTP to the access node eNodeB, and completes the establishment of the SCTP link.
  • Step 4 The access node sends an S1 connection creation request through the established underlying SCTP link (S1). SETUP Request) An interface signaling processing entity to the mobility management entity MME.
  • the S1 connection creation request carries a tracking area supported by the access node, and the access node can support one or more tracking areas, and both carry the interface signaling processing entity sent to the mobility management entity MME in the S1 connection creation request.
  • the interface signaling processing entity of the mobility management entity MME stores the tracking area supported by the access node, and establishes an S1-AP connection between the access nodes.
  • Step 5 The interface signaling processing entity returns a response message.
  • An MME in the network may connect to thousands of access nodes.
  • the current implementation is to share the average load on each interface signaling processing entity of the mobility management network element, and the number of interface signaling processing entities is relatively large, possibly reaching hundreds. To achieve load balancing.
  • a connection state the network allocates radio resources for the user equipment to transmit user plane data, and the data packets can be directly transmitted between the user equipment and the network.
  • the user equipment consumes a large amount of power and occupies a large amount of radio resources. Therefore, in the case where there is no data transmission for a period of time, the network will turn the user equipment to an idle state.
  • the idle state the network releases the radio resources allocated to the user equipment, and the user equipment also works in the provincial mode, but in this state, the user equipment needs to first transmit to the connection state to send or receive data.
  • the idle state when the network needs to send signaling or data to a certain user equipment, all the cells in the registration area of the user equipment are paged by the paging technology, and the user equipment receives the information sent to itself. After the message is called, the page is responded to, and communication with the network is established, and the connection state is changed.
  • the mobile management entity MME When the mobile management entity MME initiates paging for the user terminal UE in the idle state, it needs to broadcast a paging message to all access nodes corresponding to the registration area where the user terminal is located (because the UE may be in any cell corresponding to the registration area, each of the required The cell in which the UE may exist initiates a paging broadcast to wake up the designated UE).
  • the registration area of the UE In the EPS network, the registration area of the UE is called a Tracking Area List (TA List), and is composed of one or more Tracking Areas (TAs).
  • the number of access nodes serving the registration area of the user terminal may reach several hundred. If the connection of these access nodes is randomly distributed in each interface signaling processing entity of the mobility management network element, the user signaling processing entity is initiating.
  • the MME When paging, it may be necessary to send a paging message to each of the hundreds of interface signaling processing entities. Assume that there are 200 access nodes in the user registration area, and the system has a total of 100 interface signaling processing entities. The user signaling processing entity sends a paging message to all interface signaling processing entities, and the interface signaling processing entity sends a paging message to 200 access nodes in the registration area, and the paging process moves the management network. The unit needs to process 300 paging messages. Therefore, the MME in the conventional technology allocates an interface signaling processing entity to the access node, so that the MME may need to traverse all the interface signaling processing entities when paging according to the registration area, thereby causing waste of computing resources and reducing effectiveness.
  • the mobility management network element allocates an interface signaling processing entity to the access node in the above-mentioned conventional technology, and the technical problem is low.
  • a way to create a link. Execution of the method may rely on a computer program that can run on a mobility management network element (e.g., mobility management entity MME) in a mobile communication network or a computer system having the functionality of a mobility management network element.
  • a mobility management network element e.g., mobility management entity MME
  • the method for creating a link is shown in FIG. 4.
  • the method will be described in detail below by taking an EPC system as an example. Specifically, the method includes:
  • Step S102 Receive an underlying link creation request sent by the access node.
  • the access node is the base station eNodeB in the LTE system.
  • the underlying link creation request for the S1 interface may be an SCTP (Chinese: Stream Control Transmission Protocol) link creation request;
  • the mobility management network element may be a mobility management entity MME.
  • the access node initiates an SCTP link creation request, and sends an SCTP initial message to the mobility management entity MME to request to establish a connection.
  • the MME may receive the SCTP link creation request initiated by the access node by using the logical link routing entity, and obtain the identifier information of the access node according to the SCTP link creation request, where the identifier information may be Is the Internet Protocol IP address of the access node.
  • Step S104 Acquire a second interface signaling processing entity corresponding to the access node.
  • the interface signaling processing entity is a logical functional entity used by the MME to establish an SCTP connection with the access node.
  • step S106 and step S108 are performed.
  • Step S106 Allocating a first interface signaling processing entity to the access node, establishing a temporary underlying link with the access node by using the first interface signaling processing entity, and receiving an application layer connection sent by the access node by using the temporary lower layer link The request is established, and the application layer connection establishment request includes the first location area.
  • Step S108 Allocating a second interface signaling processing entity corresponding to the first location area to the access node, notifying the access node to reconstruct the underlying link, where the reconstructed underlying link is an underlying link created by the second interface signaling processing entity .
  • the underlying link creation request for the S1 interface may be an SCTP request
  • the MME may create a request for the underlying link (SCTP link creation).
  • the processing entity to receive an application layer connection creation request (for example, an S1-AP connection creation request) uploaded by the temporary underlying link, and acquire a first location area corresponding to the access node according to the application layer connection creation request
  • the location area may be a tracking area TA
  • the second node signaling processing entity corresponding to the first location area is allocated to the access node, and the access node is notified to re-establish the underlying link (ie, reconstruction) SCTP link).
  • the first interface signaling processing entity is an interface signaling processing entity that the MME temporarily allocates randomly for the access node that currently initiates the SCTP link creation request.
  • the access node first establishes a first SCTP link with the temporarily allocated first interface signaling processing entity, that is, the underlying link of the temporary S1 interface, and then according to the conventional technology shown in FIG. 2, the access node and the mobility management entity
  • the S1 interface application layer connection creation request is sent by the first SCTP link.
  • the S1 interface application protocol (S1-AP) connection creation request is obtained, and the access node passes the S1.
  • the interface application protocol connection creation request uploads the first tracking area TA to the MME.
  • the tracking area TA is a location concept in the LTE system.
  • the location area of the access node service is identified by the tracking area TA.
  • the MME After the access node creates the request carrying the tracking area TA (ie, the first location area) through the S1-AP connection on the temporarily established first SCTP link, the MME stores the identifier of the access node and the corresponding The area TA is tracked, and then the access node is assigned a second interface signaling processing entity corresponding to the tracking area TA.
  • the tracking area TA ie, the first location area
  • the second interface signaling processing entity is an interface signaling processing entity that is actually allocated by the MME for establishing a second SCTP link for actual data transmission with the access node
  • the first interface signaling processing entity is An interface signaling processing entity temporarily allocated by the MME for establishing a first SCTP link of the tracking area TA of the temporary transmission access node with the access node.
  • the MME allocates an interface signaling processing entity corresponding to the same tracking area TA when allocating the second interface signaling processing entity corresponding to the tracking area TA sent by the access node. For example, if an interface signaling processing entity that has been created by the MME has been allocated to multiple access nodes, the tracking areas TA sent by the multiple access nodes are the same, and when there is an access node access again, and the MME A temporary first SCTP link is established, and after the first tracking area TA is sent through the S1 interface application layer connection creation request, when the MME allocates the second interface signaling processing entity to the access node, it searches for all the The interface signaling processing entity corresponding to the uploaded first tracking area TA, and then assigning the second interface signaling processing entity to the access node in the found interface signaling processing entity.
  • the same tracking area TA may also correspond to multiple interface signaling processing entities (the number is small), and the same tracking area TA may be considered to correspond to one interface.
  • the signaling processing entity set when the second interface signaling processing entity corresponding to the TA is allocated to the access node, may first find the interface signaling processing entity set corresponding to the tracking area TA, and then perform the interface signaling processing entity The second interface signaling processing entity is selected in the set.
  • the MME may obtain the identifier of the first location area, and allocate a second interface signaling processing entity to the access node according to the value obtained by modulating the identifier.
  • the first location area is the tracking area TA
  • the identifier of the first location area is the tracking area identifier (English: Tracking Area Identity, TAI for short)
  • the TAI is defined by the PLMN (English: Public Land Mobile Network) , Chinese: Public Land Mobile Network) and TAC (English: Tracking Area Code, Chinese: Tracking Area Code). Therefore, the TAI is a serial number
  • the second interface signaling processing entity that is the access node can be selected in the interface signaling processing entity set by the value obtained by modulating the TAI.
  • an interface signaling processing entity may be randomly allocated as the second interface signaling processing entity corresponding to the access node.
  • the MME may notify the access node to reestablish the SCTP link on the S1 interface.
  • the MME may return an application layer connection establishment rejection message to the access node, where And the application layer connection reject message includes an identifier that is predefined to be reconnected, and the reconnection identifier is used to instruct the access node to rebuild the underlying link.
  • the access node and the MME establish a first SCTP link (temporary underlying link) that acts as a temporary transmission tracking area TA (first location area), so that the access node can pass the first
  • An SCTP link initiates an application layer connection creation request for the S1 interface.
  • the MME may return an S1-AP connection reject message to the access node (ie, an application layer).
  • the connection establishment reject message), and the S1-AP connection reject message contains an identifier pre-defined as reconnect.
  • the SCTP link creation request (ie, an underlying link creation request of the S1 interface) can be re-initiated by the reconnection identifier to be reconnected.
  • the reconnection identifier may be a cause value cell in an existing S1 link setup reject message, and an enumeration may be added as a specific cause value predefined as reconnection, or a cell may be added. As an identifier pre-defined as reconnected.
  • step S104 it is determined in step S104 whether the second interface signaling corresponding to the access node is obtained. Processing the entity, and since the second interface signaling processing entity has been allocated to the access node, the pre-allocated second interface signaling processing entity corresponding to the identifier of the access node may be found, and thus, Step S110 is performed.
  • Step S110 Establish an underlying link with the access node by using the second interface signaling processing entity.
  • the processing entity and the access section are processed by the discovered second interface signaling.
  • the point establishes a second SCTP link, and initiates an S1-AP connection creation request through the second SCTP link.
  • the MME may create a second SCTP link with the access node through the second interface signaling processing entity (data transmission between the MME and the access node)
  • the link, the non-temporary transmission link, is then initiated by the access node through the second SCTP link to initiate an application layer connection creation request for the S1 interface.
  • the MME may find two ways to allocate the second interface to the access node that initiated the SCTP link creation request. Signaling processing entity.
  • Manner 1 When the second interface signaling processing entity corresponding to the first location area is allocated to the access node, the MME stores a mapping relationship between the identifier of the access node and the allocated second interface signaling processing entity; The method for obtaining the second interface signaling processing entity corresponding to the access node is: searching for a second interface signaling processing entity corresponding to the identifier of the access node according to the mapping relationship.
  • Manner 2 generating a token identifier corresponding to the second interface signaling processing entity when the second interface signaling processing entity corresponding to the first location area is allocated to the access node;
  • the application identifier is carried in the application layer connection establishment reject message, and the access node initiates the underlying link creation request when reestablishing the underlying link.
  • the token identifier is carried in the middle.
  • the MME obtains the second interface signaling processing entity corresponding to the access node by acquiring the token identifier included in the underlying link creation request, and searching or calculating according to the token identifier to obtain the corresponding corresponding to the access node.
  • the second interface signaling processing entity obtains the second interface signaling processing entity corresponding to the access node by acquiring the token identifier included in the underlying link creation request, and searching or calculating according to the token identifier to obtain the corresponding corresponding to the access node.
  • Step 1 The access node initiates an SCTP link setup and sends an SCTP initial message to the MME.
  • Step 2 After receiving the message, the link routing entity of the MME randomly selects an interface signaling processing entity as the first interface signaling processing entity according to the principle of load sharing.
  • Step 3 The MME returns a message such as an initial SCTP response to the access node through the first interface signaling processing entity, and completes establishment of the temporary first SCTP link (temporary underlying link).
  • Step 4 The access node sends an application layer connection request of the S1 interface to the first interface signaling processing entity of the MME, where the message carries the tracking area TA supported by the access node (ie, the first location area), and the access node can support One or more tracking areas, the access node carries all supported tracking areas in the message.
  • the message carries the tracking area TA supported by the access node (ie, the first location area), and the access node can support One or more tracking areas, the access node carries all supported tracking areas in the message.
  • the MME pre-allocates the second interface signaling processing entity to the access node according to the tracking area TA supported by the access node.
  • the principle of allocation is that the access nodes serving the same tracking area TA are connected as much as possible to one or a few interface signaling processing entities.
  • the MME may obtain the interface signaling processing entity number according to the tracking area TA modulo, and the interface signaling processing entity is the second interface signaling processing entity.
  • a mapping relationship between the identity of the access node e.g., the IP address of the access node eNodeB
  • the assigned second interface signaling processing entity is then stored.
  • Step 5 The MME sends an S1 SETUP REJECT message to the access node, where the message carries a reconnection identifier (which may be a cause value cell in the existing S1 link establishment reject message, which may be increased.
  • a reconnection identifier which may be a cause value cell in the existing S1 link establishment reject message, which may be increased.
  • An enumeration is used as a specific cause value that is predefined as reconnect, and a new cell can be added as an identifier pre-defined as reconnected.
  • Step 6 The access node or the mobility management network element removes the first SCTP link established in step 1.
  • Step 7 The access node re-initiates the SCTP link setup based on the reconnection identifier.
  • Step 8 The MME searches for a second interface signaling processing entity pre-allocated for the access node according to the stored mapping relationship.
  • Step 9 The second interface signaling processing entity returns a response message to complete the second SCTP link establishment.
  • Step 10 The access node sends an application layer connection creation request of the S1 interface to complete the registration of the access node.
  • Step 11 The MME processes the entity reply response message through the second interface signaling, and completes the S1-AP connection. Connected to establish.
  • Step 1 The access node initiates an SCTP link setup and sends an SCTP initial message to the MME.
  • Step 2 After receiving the message, the link routing entity of the MME randomly selects an interface signaling processing entity as the first interface signaling processing entity according to the principle of load sharing.
  • Step 3 The MME returns a message such as an initial SCTP response to the access node through the first interface signaling processing entity, and completes establishment of the temporary first SCTP link (temporary underlying link).
  • Step 4 The access node sends an S1-AP connection setup request to the first interface signaling processing entity of the MME, where the message carries the tracking area TA supported by the access node (ie, the first location area), and the access node may support one or Multiple tracking areas, the access node carries all supported tracking areas in the message.
  • the message carries the tracking area TA supported by the access node (ie, the first location area), and the access node may support one or Multiple tracking areas, the access node carries all supported tracking areas in the message.
  • the MME pre-allocates the second interface signaling processing entity to the access node according to the tracking area TA supported by the access node.
  • the principle of allocation is that the access nodes serving the same tracking area TA are connected as much as possible to one or a few interface signaling processing entities.
  • the MME may obtain the interface signaling processing entity number according to the tracking area TA modulo, and the interface signaling processing entity is the second interface signaling processing entity.
  • Step 5 The MME sends an S1-AP Connection Rejection (S1 SETUP REJECT) message to the access node, where the message carries a reconnection identifier and a token identifier corresponding to the second interface signaling processing entity.
  • S1-AP Connection Rejection S1 SETUP REJECT
  • Step 6 The access node or the mobility management network element removes the first SCTP link established in step 1.
  • Step 7 The access node re-initiates the SCTP connection establishment according to the reconnection identifier, and the message includes the token identifier corresponding to the second interface signaling processing entity.
  • Step 8 The MME searches for the token identifier (the MME pre-stores the mapping relationship between the second interface signaling processing entity and the assigned token identifier. After receiving the token identifier, the MME checks the mapping relationship according to the mapping relationship. The second interface signaling processing entity corresponding to the token identifier is searched or calculated (the number of the second interface signaling processing entity in the MME is encoded into a token identifier, and the MME decodes the token identifier after receiving the token identifier, The corresponding second interface signaling processing entity is obtained, and the second interface signaling processing entity pre-allocated for the access node is obtained.
  • Step 9 The second interface signaling processing entity returns a response message to complete the second SCTP link establishment.
  • Step 10 The access node sends an S1-AP connection setup request message to complete the registration of the access node.
  • Step 11 The MME processes the entity reply response message through the second interface signaling, and completes the S1-AP connection establishment.
  • the location area supported by the access node may be updated, and when the location area supported by the access node changes, the updated second location area may be sent to the mobility management network element.
  • the mobility management network element may acquire the second location area according to the location area update request, and re-based the second location area.
  • the second node signaling processing entity is allocated to the access node, and the access node is notified to re-establish the underlying link.
  • the second tracking area TA to the MME is sent through the established S1-AP connection on the second SCTP link, and the MME is configured according to The updated second tracking area TA re-allocates the second interface signaling processing entity to the access node, and after notifying the access node to re-establish the SCTP link, the MME receives the SCTP link creation request initiated by the access node again, due to the existence of the re-establishment Assigning the second interface signaling processing entity, so that the second interface signaling processing entity corresponding to the access node can be found, so that the second SCTP can be re-established by the redistributed second interface signaling processing entity and the access node
  • the link completes the establishment of the S1-AP connection after updating the tracking area TA.
  • the location area update request may be re-allocated by re-sending the mobile management network element.
  • the two interface signaling processing entity improves the scalability of the system.
  • the mobility management network element may also perform paging on the target user terminal UE under the jurisdiction of the access node according to the service requirement, specifically: acquiring the registration area of the target user terminal UE, and searching for the corresponding area corresponding to the registration area.
  • the interface signaling processing entity initiates a paging request corresponding to the target UE to the found interface signaling processing entity.
  • the MME may first acquire the tracking area TA (ie, the registration area of the UE) of the target user terminal UE in the idle state that needs to be paged, and the number may be one or more TAs. Then, in the MME system, the access node corresponding to all the TAs in the location area is searched, and the access node searches for one or more interface signaling processing entities corresponding to the access node, and then finds The interface signaling processing entity sends a paging request.
  • TA tracking area of the UE
  • the manner in which the MME allocates the interface signaling processing entity is not a purely random allocation, but a set consisting of one interface signaling processing entity or a small number of interface signaling processing entities to match all The access node of the same TA, therefore, the MME does not need to traverse all the interface signaling processing entities when paging, but only needs to perform paging on the interface signaling processing entity corresponding to the access node, thereby reducing The number of unnecessary calls increases the efficiency of execution.
  • the access node may further send a node capability notification message to the mobility management network element, where the node capability notification message is the capability of the access node to support reconstruction of the underlying link.
  • the configuration message includes an identifier of whether the access node supports rebuilding the underlying link.
  • the node capability notification message may specifically be an interface message between the access node and the MME, such as an S1 interface application layer connection creation request message or an access node configuration update message.
  • the mobility management network element may further determine whether the access node supports the reestablishment link before notifying the access node to re-establish the underlying link, and if yes, performing the step of notifying the access node to re-establish the underlying link.
  • the information about the capability of the SCTP link can be configured on the access node, or can be sent to the access node through other network elements, such as Operation and Maintenance (English: OAM).
  • OAM Operation and Maintenance
  • whether an identifier supporting a reestablished SCTP link can be defined by one of the following:
  • the access node carries an indication identifier in the node capability notification message sent to the MME, indicating that the access node supports reestablishing the SCTP link. If the node capability notification message does not carry the indication identifier, it indicates that the access node does not support connection reestablishment.
  • the access node carries an indication identifier in the node capability notification message sent to the MME, indicating that the access node does not support reestablishing the SCTP link. If the node capability notification message does not carry the indication identifier, it indicates that the access node supports connection reestablishment.
  • the access node carries an indication identifier in the node capability notification message sent to the mobility management network element, and the indication identifier has two enumerated types, respectively indicating that the access node supports or does not support connection reestablishment.
  • the identifier carried in the node capability notification message may be implemented by adding a cell or an extension cell.
  • An apparatus for creating an S1 interface link including: a request receiving module 102, a temporary link establishing module 104, and a second interface assigning module 106, wherein:
  • the request receiving module 102 is configured to receive an underlying link creation request sent by the access node
  • the temporary link establishing module 104 is configured to allocate a first interface signaling processing entity to the access node, and establish, by the first interface signaling processing entity, a temporary underlying link with the access node, by using the The temporary underlying link receives an application layer connection establishment request sent by the access node, where the application layer connection establishment request includes a first location area;
  • a second interface allocating module 106 configured to allocate, by the access node, a second interface signaling processing entity corresponding to the first location area, to notify the access node to reconstruct an underlying link, and the reconstructed underlying link The underlying link created by the second interface signaling processing entity.
  • the second interface assignment module 106 is further configured to return an application layer connection establishment reject message to the access node, and the application layer connection establishment reject message includes a reconnection identifier, the reconnection identifier The symbol is used to instruct the access node to rebuild the underlying link.
  • the device further includes a second interface obtaining module 108, Obtaining, by the second interface, the signaling processing entity corresponding to the access node, when the second interface signaling processing entity has been allocated to the access node, processing the entity and the The access node establishes an underlying link.
  • the second interface assignment module 106 is further configured to generate a token identifier corresponding to the second interface signaling processing entity; and return an application layer connection establishment reject message to the access node, where The application layer connection establishment rejection message includes the token identifier, and the access node includes the token identifier in the initiated underlying link creation request when rebuilding the underlying link.
  • the second interface obtaining module 108 is further configured to acquire a token identifier included in the underlying link creation request, and obtain a second corresponding to the access node according to the token identifier search or calculation. Interface signaling processing entity.
  • the second interface allocation module 106 is further configured to store a mapping relationship between the access node and the allocated second interface signaling processing entity.
  • the second interface obtaining module 108 is further configured to search, according to the mapping relationship, a second interface signaling processing entity corresponding to the access node.
  • the apparatus further includes a location area update module 110, configured to receive an uploaded location area update request, and obtain a second location area according to the location area update request, according to the The two-location area allocates a second interface signaling processing entity to the access node, and notifies the access node to re-establish the underlying link.
  • a location area update module 110 configured to receive an uploaded location area update request, and obtain a second location area according to the location area update request, according to the The two-location area allocates a second interface signaling processing entity to the access node, and notifies the access node to re-establish the underlying link.
  • the second interface allocation module 106 is configured to obtain an identifier of the first location area, and allocate a second interface signaling processing entity to the access node according to a value obtained by modulating the identifier.
  • the identity of the access node is an internetworking protocol IP address of the access node.
  • the apparatus further includes a paging module 112, configured to acquire a registration area of the target user terminal UE, and search for an interface signaling processing entity corresponding to the registration area, to perform the searching.
  • the incoming interface signaling processing entity initiates a paging request corresponding to the target UE.
  • the apparatus further includes a node capability notification message receiving module. 114.
  • the node capability notification message sent by the access node is received, where the node capability notification message includes an identifier of whether the access node supports reestablishing a link.
  • the second interface assignment module 106 is configured to notify the access node to re-establish the underlying link when the access node supports the re-establishment link.
  • the mobility management network element after receiving the underlying link creation request initiated by the access node, the mobility management network element does not directly allocate an interface signaling processing entity for creating data for transmitting data.
  • the underlying link but first assigns a temporary first interface signaling processing entity to the access node, and then creates a temporary underlying link through the temporary first interface signaling processing entity, and obtains the temporary underlying link.
  • the first location area that is sent by the access node when the application layer is created, and then the second interface signaling processing entity corresponding to the first location area is re-assigned to the access node according to the first location area, and the access is notified.
  • the node rebuilds the underlying link.
  • the mobility management network element can establish a stable underlying link for transmitting data through the allocated second interface signaling processing entity and the access node.
  • the mobile management network element can quickly find one or a few interface signaling processing entities corresponding to the location area according to the location area, and when the mobility management network element pages the UE in the idle state according to the service requirement, The paging request can be sent only to the one or a few interface signaling processing entities, thereby greatly reducing unnecessary paging times and improving system execution efficiency.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

Disclosed in an embodiment of the present invention is a method for creating a link. The method comprises: receiving a bottom-layer link creation request sent by an access node; allocating to the access node a first interface signal processing entity, establishing a temporary bottom-layer link to the access node by using the first interface signal processing entity, and receiving, via the temporary bottom-layer link, an application layer connection creation request sent by the access node, wherein the application layer connection creation request comprises a first location area; and allocating to the access node a second interface signal processing entity corresponding to the first location area, so as to instruct the access node to reestablish a bottom layer link, wherein the reestablished bottom-layer link is created by using the second interface signal processing entity. The link creation method of the present invention can reduce the number of pagings, thereby enhancing execution efficiency.

Description

创建链路的方法及装置Method and device for creating link 技术领域Technical field
本发明涉及移动通信技术领域，特别是涉及一种创建链路的方法及装置。The present invention relates to the field of mobile communications technologies, and in particular, to a method and apparatus for creating a link.
背景技术Background technique
S1接口是LTE(Long Term Evolution，长期演进)系统中的接入节点(Evolved Node B，即演进型Node B，LTE系统中的基站)与移动管理网元(例如，移动管理网元可以是移动管理实体，英文：Mobility Management Entity，简称：MME)之间的通讯接口。用户终端的数据在传输至分组核心网前，用户终端先与接入节点建立连接，再通过接入节点接入移动管理网元，接入节点和移动管理网元之间建立S1接口流控制传输协议(英文：Stream Control Transmission Protocol，简称：SCTP)链路和S1应用协议(英文：S1Application Protocol，简称：S1-AP)连接进行通信。The S1 interface is an access node (Evolved Node B, an evolved Node B, a base station in an LTE system) and a mobility management network element (for example, the mobility management network element may be mobile) in an LTE (Long Term Evolution) system. Management entity, English: Mobility Management Entity, referred to as: MME) communication interface. Before the data of the user terminal is transmitted to the packet core network, the user terminal first establishes a connection with the access node, and then accesses the mobility management network element through the access node, and establishes an S1 interface flow control transmission between the access node and the mobility management network element. The protocol (English: Stream Control Transmission Protocol, SCTP for short) is connected to the S1 application protocol (S1 Application Protocol, S1-AP for short).
为了节省网络资源，用户终端一段时间内没有数据通信的情况下，接入节点和移动管理网元之间会释放S1接口链路，将用户终端释放为空闲状态。此时若有数据需要发送给用户终端，则需要移动管理网元对该用户终端发起寻呼。移动管理网元通过用户终端的注册区域定位用户终端可能所在的小区进行寻呼，所述注册区域被称为跟踪区域列表(Tracking Area List，TA List)，由1个或多个跟踪区域(Tracking Area，TA)组成。因此移动管理网元内的用户信令处理实体需要查询用户终端的注册区域对应的所有接入节点，以及系统内与该接入节点建立连接的接口信令处理实体，并通过该接口信令处理实体向对应的接入节点发送寻呼消息。假设用户终端的注册区域有200个接入节点，分别分布在系统内100个接口信令处理实体，则用户信令处理实体需要向100个接口信令处理实体发送消息，而这些接口信令处理实体又向注册区域内的200个接入节点发送寻呼消息，一次寻呼流程移动管理网元共需要处理300条寻呼消息。如果移动管理网元每秒发起一万次寻呼，这种移动管理网元内部模块间的寻呼消息每秒可能达到百万级别，而移动管理网元也需要处理百万级 别的和接入节点间的寻呼消息，因此将消耗移动管理网元的大量资源，从而造成了移动管理网元的执行效率较低。In order to save network resources, if the user terminal does not have data communication for a period of time, the S1 interface link is released between the access node and the mobility management network element, and the user terminal is released to the idle state. At this time, if there is data to be sent to the user terminal, the mobile management network element needs to initiate paging for the user terminal. The mobile management network element performs paging by locating the cell where the user terminal may be located in the registration area of the user terminal, and the registration area is called a Tracking Area List (TA List), and is composed of one or more tracking areas (Tracking). Area, TA) composition. Therefore, the user signaling processing entity in the mobility management network element needs to query all access nodes corresponding to the registration area of the user terminal, and the interface signaling processing entity in the system that establishes a connection with the access node, and process the signaling through the interface. The entity sends a paging message to the corresponding access node. Assuming that there are 200 access nodes in the registration area of the user terminal, which are respectively distributed in 100 interface signaling processing entities in the system, the user signaling processing entity needs to send messages to 100 interface signaling processing entities, and these interface signaling processing The entity sends a paging message to the 200 access nodes in the registration area. The paging management process requires a total of 300 paging messages. If the mobility management network element initiates 10,000 pagings per second, the paging message between the internal modules of the mobility management network element may reach one million levels per second, and the mobility management network element also needs to process millions of levels. The paging message between the other access nodes and the access node will consume a large amount of resources of the mobility management network element, thereby causing the execution efficiency of the mobility management network element to be low.
发明内容Summary of the invention
基于此，为了解决上述传统技术中移动管理网元为接入节点分配接口信令处理实体的方式造成的移动管理网元在根据注册区域进行寻呼时对资源的浪费，执行效率较低的技术问题，特提出了一种创建链路的方法。Based on this, in order to solve the problem that the mobile management network element wastes resources when paging according to the registration area, the mobile management network element allocates an interface signaling processing entity to the access node in the above-mentioned conventional technology, and the technical efficiency is low. A method of creating a link is proposed.
本发明实施例第一方面公开了一种创建链路的方法，包括：The first aspect of the embodiment of the present invention discloses a method for creating a link, including:
接收接入节点发送的底层链路创建请求；Receiving an underlying link creation request sent by the access node;
为所述接入节点分配第一接口信令处理实体，通过所述第一接口信令处理实体与所述接入节点建立临时的底层链路，通过所述临时的底层链路接收所述接入节点发送的应用层连接建立请求，所述应用层连接建立请求中包含第一位置区域；Allocating a first interface signaling processing entity to the access node, establishing, by the first interface signaling processing entity, a temporary underlying link with the access node, and receiving the connection by using the temporary underlying link An application layer connection establishment request sent by the ingress node, where the application layer connection establishment request includes a first location area;
为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体，通知所述接入节点重建底层链路，所述重建的底层链路为通过所述第二接口信令处理实体创建的底层链路。Allocating, to the access node, a second interface signaling processing entity corresponding to the first location area, informing the access node to re-establish an underlying link, where the reconstructed underlying link is signaling through the second interface Process the underlying link created by the entity.
结合本发明第一方面可能的实现方式，在本发明第一方面的第一种可能的实现方式中，所述通知所述接入节点重建底层链路还包括：With the possible implementation of the first aspect of the present invention, in a first possible implementation manner of the first aspect of the present disclosure, the notifying the access node to re-establish the underlying link further includes:
向所述接入节点返回应用层连接建立拒绝消息，且所述应用层连接建立拒绝消息中包含重连接标识符，所述重连接标识符用于指示所述接入节点重建底层链路。Returning an application layer connection establishment reject message to the access node, and the application layer connection establishment reject message includes a reconnection identifier, where the reconnection identifier is used to instruct the access node to reestablish an underlying link.
结合本发明第一方面可能的实现方式，在本发明第一方面的第二种可能的实现方式中，所述接收接入节点发送的底层链路创建请求之后还包括：With reference to the possible implementation manner of the first aspect of the present invention, in a second possible implementation manner of the first aspect of the present disclosure, after the receiving the access node sends the underlying link creation request, the method further includes:
获取与所述接入节点对应的第二接口信令处理实体，在获取到已为所述接入节点分配第二接口信令处理实体时，通过所述第二接口信令处理实体与所述接入节点建立底层链路。Obtaining, by the second interface signaling processing entity corresponding to the access node, when the second interface signaling processing entity has been allocated to the access node, by using the second interface signaling processing entity and the The access node establishes the underlying link.
结合本发明第一方面以及第一方面第二种可能的实现方式，在本发明第一 方面的第三种可能的实现方式中，所述为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体包括：In combination with the first aspect of the invention and the second possible implementation of the first aspect, the first aspect of the present invention In a third possible implementation manner of the aspect, the assigning, by the access node, the second interface signaling processing entity corresponding to the first location area includes:
生成与所述第二接口信令处理实体对应的令牌标识；Generating a token identifier corresponding to the second interface signaling processing entity;
所述通知所述接入节点重建底层链路还包括：The notifying the access node to re-establish the underlying link further includes:
向所述接入节点返回应用层连接建立拒绝消息，在所述应用层连接建立拒绝消息中包含所述令牌标识，所述接入节点在重建底层链路时在发起的底层链路创建请求中包含所述令牌标识。Returning, to the access node, an application layer connection establishment reject message, where the application layer connection establishment reject message includes the token identifier, and the access node initiates an underlying link creation request when reestablishing the underlying link The token identifier is included in the file.
结合本发明第一方面以及第一方面第三种可能的实现方式，在本发明第一方面的第四种可能的实现方式中，所述获取与所述接入节点对应的第二接口信令处理实体还包括：In conjunction with the first aspect of the present invention and the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect of the present disclosure, the acquiring the second interface signaling corresponding to the access node Processing entities also include:
获取所述底层链路创建请求中包含的令牌标识，根据所述令牌标识查找或计算得到与所述接入节点对应的第二接口信令处理实体。Obtaining a token identifier included in the underlying link creation request, and searching or calculating, according to the token identifier, a second interface signaling processing entity corresponding to the access node.
结合本发明第一方面以及第一方面第二种可能的实现方式，在本发明第一方面的第五种可能的实现方式中，所述为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体包括：With reference to the first aspect of the present invention and the second possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, the access node is allocated to the first location area The second interface signaling processing entity includes:
获取所述接入节点的标识，存储所述接入节点的标识与所述分配的第二接口信令处理实体的映射关系；Obtaining an identifier of the access node, and storing a mapping relationship between the identifier of the access node and the allocated second interface signaling processing entity;
所述获取与所述接入节点对应的第二接口信令处理实体还包括：The acquiring the second interface signaling processing entity corresponding to the access node further includes:
根据所述映射关系查找与所述接入节点的标识对应的第二接口信令处理实体。And searching, according to the mapping relationship, a second interface signaling processing entity corresponding to the identifier of the access node.
结合本发明第一方面以及第一方面第一种至第五种中任意一种可能的实现方式，在本发明第一方面的第六种可能的实现方式中，所述通过所述第二接口信令处理实体与所述接入节点建立底层链路之后还包括：With reference to the first aspect of the present invention, and the possible implementation of any one of the first to fifth aspects of the present invention, in a sixth possible implementation manner of the first aspect of the present invention, the After the signaling processing entity establishes the underlying link with the access node, the method further includes:
接收上传的位置区域更新请求，根据所述位置区域更新请求获取第二位置区域，重新根据所述第二位置区域为所述接入节点分配第二接口信令处理实体，通知所述接入节点重建底层链路。 Receiving the uploaded location area update request, acquiring the second location area according to the location area update request, and re-assigning the second interface signaling processing entity to the access node according to the second location area, and notifying the access node Rebuild the underlying link.
结合本发明第一方面以及第一方面第一种至第五种中任意一种可能的实现方式，在本发明第一方面的第七种可能的实现方式中，所述为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体为：With reference to the first aspect of the present invention, and the possible implementation manner of any one of the first to fifth aspects of the first aspect, in the seventh possible implementation manner of the first aspect of the present disclosure, And allocating the second interface signaling processing entity corresponding to the first location area is:
获取所述第一位置区域的标识，根据对所述标识进行取模得到的值为所述接入节点分配第二接口信令处理实体。Obtaining an identifier of the first location area, and assigning, by the value obtained by modulating the identifier, the second interface signaling processing entity to the access node.
结合本发明第一方面以及第一方面第一种至第五种中任意一种可能的实现方式，在本发明第一方面的第八种可能的实现方式中，所述接入节点的标识为所述接入节点的网际互连协议IP地址。With reference to the first aspect of the present invention, and the possible implementation of any one of the first to fifth aspects of the present invention, in an eighth possible implementation manner of the first aspect of the present disclosure, the identifier of the access node is The internetworking protocol IP address of the access node.
结合本发明第一方面以及第一方面第一种至第五种中任意一种可能的实现方式，在本发明第一方面的第九种可能的实现方式中，所述方法还包括：With reference to the first aspect of the present invention, and the possible implementation of any one of the first to fifth aspects of the present invention, in a ninth possible implementation manner of the first aspect of the present invention, the method further includes:
获取用户终端UE的注册区域，查找与所述注册区域对应的接口信令处理实体，向所述查找到的接口信令处理实体发起与所述UE对应的寻呼请求。Obtaining a registration area of the user terminal UE, searching for an interface signaling processing entity corresponding to the registration area, and initiating a paging request corresponding to the UE to the searched interface signaling processing entity.
结合本发明第一方面以及第一方面第一种至第五种中任意一种可能的实现方式，在本发明第一方面的第十种可能的实现方式中，所述方法还包括：With reference to the first aspect of the present invention, and the possible implementation of any one of the first to fifth aspects of the present invention, in a tenth possible implementation manner of the first aspect of the present invention, the method further includes:
接收所述接入节点发送的节点能力通知消息，所述节点能力通知消息中包含有所述接入节点是否支持重建链路的标识符；Receiving, by the access node, a node capability notification message, where the node capability notification message includes an identifier of whether the access node supports reestablishing a link;
所述通知所述接入节点重建底层链路之前还包括：The notifying the access node before rebuilding the underlying link further includes:
判断所述接入节点是否支持重建链路，若是，则执行所述通知所述接入节点重建底层链路的步骤。Determining whether the access node supports reestablishing a link, and if so, performing the step of notifying the access node to reestablish an underlying link.
此外，为了解决上述传统技术中移动管理网元为接入节点分配接口信令处理实体的方式造成的移动管理网元在根据注册区域进行寻呼时对资源的浪费，执行效率较低的技术问题，特提出了一种创建链路的装置。In addition, in order to solve the technical problem that the mobile management network element wastes resources when paging according to the registration area, the mobility management network element allocates an interface signaling processing entity to the access node in the above-mentioned conventional technology, and the technical efficiency is low. A device for creating a link is proposed.
本发明实施例第二方面公开了一种创建链路的装置，包括：The second aspect of the embodiment of the present invention discloses an apparatus for creating a link, including:
请求接收模块，用于接收接入节点发送的底层链路创建请求；a request receiving module, configured to receive an underlying link creation request sent by the access node;
临时链路建立模块，用于为所述接入节点分配第一接口信令处理实体，通过所述第一接口信令处理实体与所述接入节点建立临时的底层链路，通过所述临时的底层链路接收所述接入节点发送的应用层连接建立请求，所述应用层连 接建立请求中包含第一位置区域；a temporary link establishing module, configured to allocate a first interface signaling processing entity to the access node, and establish, by using the first interface signaling processing entity, a temporary underlying link with the access node, by using the temporary Receiving an application layer connection establishment request sent by the access node, the application layer connection The first location area is included in the connection establishment request;
第二接口分配模块，用于为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体，通知所述接入节点重建底层链路，所述重建的底层链路为通过所述第二接口信令处理实体创建的底层链路。a second interface allocation module, configured to allocate, by the access node, a second interface signaling processing entity corresponding to the first location area, to notify the access node to re-establish an underlying link, where the reconstructed underlying link is The underlying link created by the entity is processed by the second interface signaling.
结合本发明第二方面可能的实现方式，在本发明第二方面的第一种可能的实现方式中，所述第二接口分配模块还用于向所述接入节点返回应用层连接建立拒绝消息，且所述应用层连接建立拒绝消息中包含重连接标识符，所述重连接标识符用于指示所述接入节点重建底层链路。With the possible implementation of the second aspect of the present invention, in a first possible implementation manner of the second aspect, the second interface allocation module is further configured to return an application layer connection establishment reject message to the access node. And the application layer connection establishment reject message includes a reconnection identifier, where the reconnection identifier is used to instruct the access node to reestablish the underlying link.
结合本发明第二方面可能的实现方式，在本发明第二方面的第二种可能的实现方式中，所述装置还包括第二接口获取模块，用于获取与所述接入节点对应的第二接口信令处理实体，在获取到已为所述接入节点分配第二接口信令处理实体时，通过所述第二接口信令处理实体与所述接入节点建立底层链路。With reference to the possible implementation of the second aspect of the present invention, in a second possible implementation manner of the second aspect of the present disclosure, the device further includes a second interface acquiring module, configured to acquire a corresponding to the access node The second interface signaling processing entity establishes an underlying link with the access node by using the second interface signaling processing entity when the second interface signaling processing entity has been allocated to the access node.
结合本发明第二方面以及第二方面的第二种可能的实现方式，在本发明第二方面的第三种可能的实现方式中，所述第二接口分配模块用于生成与所述第二接口信令处理实体对应的令牌标识；以及向所述接入节点返回应用层连接建立拒绝消息，在所述应用层连接建立拒绝消息中包含所述令牌标识，所述接入节点在重建底层链路时在发起的底层链路创建请求中包含所述令牌标识。With the second aspect of the present invention and the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect of the present invention, the second interface allocation module is configured to generate the second The interface signaling processing entity corresponding to the token identifier; and returning an application layer connection establishment reject message to the access node, where the application layer connection establishment reject message includes the token identifier, and the access node is reconstructed The underlying link includes the token identifier in the initiated underlying link creation request.
结合本发明第二方面以及第二方面的第三种可能的实现方式，在本发明第二方面的第四种可能的实现方式中，所述第二接口获取模块还用于获取所述底层链路创建请求中包含的令牌标识，根据所述令牌标识查找或计算得到与所述接入节点对应的第二接口信令处理实体。In conjunction with the second aspect of the present invention and the third possible implementation of the second aspect, in a fourth possible implementation manner of the second aspect, the second interface acquiring module is further configured to obtain the bottom chain The token identifier included in the path creation request is used to find or calculate a second interface signaling processing entity corresponding to the access node according to the token identifier.
结合本发明第二方面以及第二方面的第二种可能的实现方式，在本发明第二方面的第五种可能的实现方式中，所述第二接口分配模块用于获取所述接入节点的标识，存储所述接入节点的标识与所述分配的第二接口信令处理实体的映射关系；In conjunction with the second aspect of the present invention and the second possible implementation of the second aspect, in a fifth possible implementation manner of the second aspect, the second interface allocation module is configured to acquire the access node And an identifier that stores a mapping relationship between the identifier of the access node and the allocated second interface signaling processing entity;
所述第二接口获取模块还用于根据所述映射关系查找与所述接入节点的 标识对应的第二接口信令处理实体。The second interface obtaining module is further configured to search for the access node according to the mapping relationship. Identify a corresponding second interface signaling processing entity.
结合本发明第二方面以及第二方面的第一种至第五种中任一种可能的实现方式，在本发明第二方面的第六种可能的实现方式中，所述装置还包括位置区域更新模块，用于接收上传的位置区域更新请求，根据所述位置区域更新请求获取第二位置区域，重新根据所述第二位置区域为所述接入节点分配第二接口信令处理实体，通知所述接入节点重建底层链路。In conjunction with the second aspect of the present invention and any one of the first to fifth aspects of the second aspect, in a sixth possible implementation of the second aspect of the present invention, the apparatus further includes a location area And an update module, configured to receive the uploaded location area update request, obtain the second location area according to the location area update request, and re-allocate the second interface signaling processing entity to the access node according to the second location area, and notify the The access node rebuilds the underlying link.
结合本发明第二方面以及第二方面的第一种至第五种中任一种可能的实现方式，在本发明第二方面的第七种可能的实现方式中，所述第二接口分配模块用于获取所述第一位置区域的标识，根据对所述标识进行取模得到的值为所述接入节点分配第二接口信令处理实体。With reference to the second aspect of the present invention and any one of the first to fifth aspects of the second aspect, in a seventh possible implementation manner of the second aspect of the present invention, the second interface allocation module The identifier for obtaining the first location area, and the second interface signaling processing entity is allocated by the access node according to a value obtained by modulating the identifier.
结合本发明第二方面以及第二方面的第一种至第五种中任一种可能的实现方式，在本发明第二方面的第八种可能的实现方式中，所述接入节点的标识为所述接入节点的网际互连协议IP地址。With reference to the second aspect of the present invention and any one of the first to fifth aspects of the second aspect, in an eighth possible implementation manner of the second aspect of the present invention, the identifier of the access node The Internet Protocol IP address of the access node.
结合本发明第二方面以及第二方面的第一种至第五种中任一种可能的实现方式，在本发明第二方面的第九种可能的实现方式中，所述装置还包括寻呼模块，用于获取目标用户终端UE的注册区域，查找位置区域与所述注册区域对应的接口信令处理实体，向所述查找到的接口信令处理实体发起与所述目标UE对应的寻呼请求。With reference to the second aspect of the present invention and any one of the first to fifth possible implementations of the second aspect, in a ninth possible implementation of the second aspect of the present invention, the apparatus further includes paging a module, configured to acquire a registration area of the target user terminal UE, and find an interface signaling processing entity corresponding to the registration area, and initiate a paging corresponding to the target UE to the searched interface signaling processing entity. request.
结合本发明第二方面以及第二方面的第一种至第五种中任一种可能的实现方式，在本发明第二方面的第十种可能的实现方式中，所述装置还包括节点能力通知消息接收模块，用于With reference to the second aspect of the present invention and any one of the first to fifth possible implementations of the second aspect, in a tenth possible implementation manner of the second aspect of the present invention, the apparatus further includes a node capability Notification message receiving module for
接收所述接入节点发送的节点能力通知消息，所述节点能力通知消息中包含有所述接入节点是否支持重建链路的标识符；Receiving, by the access node, a node capability notification message, where the node capability notification message includes an identifier of whether the access node supports reestablishing a link;
所述第二接口分配模块，用于在所述接入节点支持重建链路时，通知所述接入节点重建底层链路。The second interface allocation module is configured to notify the access node to reestablish an underlying link when the access node supports a reestablished link.
综上所述，实施本发明实施例，将具有如下有益效果： In summary, the implementation of the embodiments of the present invention will have the following beneficial effects:
上述创建链路的方法及装置中，移动管理网元在接收到接入节点发起的底层链路创建请求之后，并没有直接地为其随机地分配一个接口信令处理实体创建用于传输数据的底层链路，而是先为接入节点分配一个临时的第一接口信令处理实体，然后通过该临时的第一接口信令处理实体创建临时的底层链路，由该临时的底层链路获取接入节点在创建应用层连接时发送的第一位置区域，再根据该第一位置区域重新为该接入节点分配与该第一位置区域对应的第二接口信令处理实体，并通知接入节点重建底层链路。在接入节点再次发起底层链路创建请求之后，移动管理网元即可通过已分配的第二接口信令处理实体与接入节点建立稳定的用于传输数据的底层链路。这就使得移动管理网元可根据位置区域快速查找到与该位置区域对应的一个或少数几个接口信令处理实体，在移动管理网元根据业务需求对处于空闲状态的UE进行寻呼时，则可仅向该一个或少数几个接口信令处理实体发送寻呼请求，从而大大减少了不必要的寻呼次数，提高了系统的执行效率。In the foregoing method and device for creating a link, after receiving the underlying link creation request initiated by the access node, the mobility management network element does not directly allocate an interface signaling processing entity for creating data for transmitting data. The underlying link, but first assigns a temporary first interface signaling processing entity to the access node, and then creates a temporary underlying link through the temporary first interface signaling processing entity, and obtains the temporary underlying link. And the first location area that is sent by the access node when the application layer is created, and then the second interface signaling processing entity corresponding to the first location area is re-assigned to the access node according to the first location area, and the access is notified. The node rebuilds the underlying link. After the access node initiates the underlying link creation request again, the mobility management network element can establish a stable underlying link for transmitting data through the allocated second interface signaling processing entity and the access node. The mobile management network element can quickly find one or a few interface signaling processing entities corresponding to the location area according to the location area, and when the mobility management network element pages the UE in the idle state according to the service requirement, The paging request can be sent only to the one or a few interface signaling processing entities, thereby greatly reducing unnecessary paging times and improving system execution efficiency.
附图说明DRAWINGS
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.
其中：among them:
图1为传统技术中EPS网络架构图；1 is a schematic diagram of an EPS network architecture in a conventional technology;
图2为传统技术中接入节点和移动管理实体MME间接口协议栈；2 is an interface protocol stack between an access node and a mobility management entity MME in the conventional technology;
图3为传统技术中建立S1-AP连接的过程时序图；3 is a timing diagram of a process of establishing an S1-AP connection in the conventional art;
图4为本发明实施例中一种创建链路的方法的流程图；4 is a flowchart of a method for creating a link according to an embodiment of the present invention;
图5为本发明实施例中一种建立S1-AP连接的过程时序图；FIG. 5 is a timing diagram of a process for establishing an S1-AP connection according to an embodiment of the present invention;
图6为本发明实施例中另一种建立S1-AP连接的过程时序图；FIG. 6 is a timing diagram of another process for establishing an S1-AP connection according to an embodiment of the present invention;
图7为本发明实施例中接入节点上传节点能力通知消息的时序图；FIG. 7 is a sequence diagram of an access node uploading node capability notification message according to an embodiment of the present invention;
图8为本发明实施例中一种创建链路的装置的示意图。 FIG. 8 is a schematic diagram of an apparatus for creating a link according to an embodiment of the present invention.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
在传统技术中，请参阅图1，图1是LTE系统的移动通信网络的网络架构图，移动通信网络为分组系统(英文：Evolved Packet System，简称：EPS)。用户终端UE通过本地的接入节点接入，接入节点为演进型NodeB(英文：evolved NodeB，简称：eNodeB)。移动管理实体(英文：Mobility Management Entity，简称：MME)负责用户终端UE的位置管理、连接管理、安全认证、网关选择等功能。服务网关(英文：Serving Gateway，中文：SGW)是用户终端UE的本地接入网关，负责接入技术相关的连接管理和数据转发。数据网关(英文：Packet Data Network Gateway，中文：PGW)是用户终端访问外部数据网络的网关。In the conventional technology, please refer to FIG. 1. FIG. 1 is a network architecture diagram of a mobile communication network of an LTE system, and the mobile communication network is a packet system (English: Evolved Packet System, abbreviated as: EPS). The user terminal UE is accessed by the local access node, and the access node is an evolved NodeB (English: evolved NodeB, e.g., eNodeB). The Mobility Management Entity (MME) is responsible for the location management, connection management, security authentication, and gateway selection of the user terminal UE. The service gateway (English: Serving Gateway, Chinese: SGW) is the local access gateway of the user terminal UE, and is responsible for access technology related connection management and data forwarding. A data gateway (English: Packet Data Network Gateway, Chinese: PGW) is a gateway for a user terminal to access an external data network.
在EPS网络中，接入节点eNodeB和移动管理实体MME直接通信。如图2所示，图2展示了传统技术中接入节点和移动管理实体之间的接口协议，采用了流控制传输协议(英文：Stream Control Transmission Protocol，简称：SCTP)和S1应用协议(英文：S1Application Protocol，简称：S1-AP)。In the EPS network, the access node eNodeB and the mobility management entity MME communicate directly. As shown in FIG. 2, FIG. 2 shows an interface protocol between an access node and a mobility management entity in a conventional technology, and uses a Stream Control Transmission Protocol (SCTP) and an S1 application protocol. :S1Application Protocol, referred to as: S1-AP).
再参考如图3所示，图3展示了传统技术中，接入节点eNodeB和移动管理实体MME之间的链路建立过程。其中链路路由实体、接口信令处理实体和用户信令处理实体都是移动管理实体MME内的逻辑上划分的功能模块。Referring again to FIG. 3, FIG. 3 illustrates a link establishment process between an access node eNodeB and a mobility management entity MME in the conventional art. The link routing entity, the interface signaling processing entity, and the user signaling processing entity are all logically divided functional modules in the mobility management entity MME.
步骤1.接入节点eNodeB发起SCTP链路建立，发送SCTP初始消息给移动管理实体MME。 Step 1. The access node eNodeB initiates SCTP link establishment, and sends an SCTP initial message to the mobility management entity MME.
步骤2.移动管理实体MME的链路路由实体收到消息后，根据负荷分担等原则，随机选择一个接口信令处理实体建立SCTP链路。该接口信令处理实体为与接入节点eNodeB对应的连接接口。Step 2. After receiving the message, the link routing entity of the mobility management entity MME randomly selects an interface signaling processing entity to establish an SCTP link according to the principle of load sharing. The interface signaling processing entity is a connection interface corresponding to the access node eNodeB.
步骤3.移动管理实体MME的接口信令处理实体向接入节点eNodeB回复SCTP初始响应等消息，完成SCTP链路建立。Step 3. The interface signaling processing entity of the mobility management entity MME returns a message such as an initial response of the SCTP to the access node eNodeB, and completes the establishment of the SCTP link.
步骤4.接入节点通过建立的底层的SCTP链路发送S1连接创建请求(S1 SETUP Request)给移动管理实体MME的接口信令处理实体。该S1连接创建请求中携带有接入节点支持的跟踪区域，接入节点可以支持一个或者多个跟踪区域，都携带在S1连接创建请求中发送给移动管理实体MME的接口信令处理实体。移动管理实体MME的接口信令处理实体存储接入节点支持的跟踪区域，建立和接入节点间的S1-AP连接。Step 4. The access node sends an S1 connection creation request through the established underlying SCTP link (S1). SETUP Request) An interface signaling processing entity to the mobility management entity MME. The S1 connection creation request carries a tracking area supported by the access node, and the access node can support one or more tracking areas, and both carry the interface signaling processing entity sent to the mobility management entity MME in the S1 connection creation request. The interface signaling processing entity of the mobility management entity MME stores the tracking area supported by the access node, and establishes an S1-AP connection between the access nodes.
步骤5.接口信令处理实体回复响应消息。 Step 5. The interface signaling processing entity returns a response message.
网络中一个MME可能连接数千上万个接入节点。对于接入节点和MME之间的大量的连接，目前的实现是将其平均地负荷分担在移动管理网元的各个接口信令处理实体上，接口信令处理实体比较多，可能达上百个，从而实现负载均衡。An MME in the network may connect to thousands of access nodes. For a large number of connections between an access node and an MME, the current implementation is to share the average load on each interface signaling processing entity of the mobility management network element, and the number of interface signaling processing entities is relatively large, possibly reaching hundreds. To achieve load balancing.
然而，用户设备(User Equipment，UE)附着到网络后有两种状态：连接状态和空闲状态。在连接状态下，网络为用户设备传输用户面数据分配了无线资源，用户设备和网络之间可以直接传送数据包。但是在这种状态下，用户设备耗电快，占用无线资源多，因此在一段时间没有数据传输的情况下，网络会将用户设备转到空闲状态。在空闲状态下，网络释放为用户设备分配的无线资源，用户设备也工作在省点模式，但是该状态下用户设备要发送或者接收数据需要先转为连接状态。在空闲状态下，当网络需要向某个用户设备发送信令或者数据时，通过寻呼技术在用户设备的注册区域内所有的小区寻呼该用户设备，用户设备在收到发给自己的寻呼消息后响应寻呼，建立与网络的通讯，转为连接状态。However, after the user equipment (User Equipment, UE) is attached to the network, there are two states: a connection state and an idle state. In the connected state, the network allocates radio resources for the user equipment to transmit user plane data, and the data packets can be directly transmitted between the user equipment and the network. However, in this state, the user equipment consumes a large amount of power and occupies a large amount of radio resources. Therefore, in the case where there is no data transmission for a period of time, the network will turn the user equipment to an idle state. In the idle state, the network releases the radio resources allocated to the user equipment, and the user equipment also works in the provincial mode, but in this state, the user equipment needs to first transmit to the connection state to send or receive data. In the idle state, when the network needs to send signaling or data to a certain user equipment, all the cells in the registration area of the user equipment are paged by the paging technology, and the user equipment receives the information sent to itself. After the message is called, the page is responded to, and communication with the network is established, and the connection state is changed.
移动管理实体MME对空闲状态的用户终端UE发起寻呼时，需要向用户终端所在的注册区域对应的所有接入节点广播寻呼消息(因为UE可能在注册区域对应的任意小区内，需要每个UE可能存在的小区发起寻呼广播来唤醒指定的UE)。在EPS网络中，UE的注册区域被称为跟踪区域列表(Tracking Area List，TA List)，由1个或多个跟踪区域(Tracking Area，TA)组成。服务于用户终端的注册区域的接入节点的数量可能达到数百个，如果这些接入节点的连接随机的分布在移动管理网元的各个接口信令处理实体，那么用户信令处理实体在发起寻呼时，可能要向上百个接口信令处理实体分别发送寻呼消息。假设用户注册区域有200个接入节点，系统共100个接口信令处理实体，如果 用户信令处理实体向所有的接口信令处理实体分别发送寻呼消息，而这些接口信令处理实体又向注册区域内的200个接入节点发送寻呼消息，则一次寻呼流程移动管理网元共需要处理300条寻呼消息。因此，传统技术中的MME为接入节点分配接口信令处理实体的方式使得MME在根据注册区域进行寻呼时，可能需要遍历所有接口信令处理实体，从而造成了计算资源的浪费，降低了执行效率。When the mobile management entity MME initiates paging for the user terminal UE in the idle state, it needs to broadcast a paging message to all access nodes corresponding to the registration area where the user terminal is located (because the UE may be in any cell corresponding to the registration area, each of the required The cell in which the UE may exist initiates a paging broadcast to wake up the designated UE). In the EPS network, the registration area of the UE is called a Tracking Area List (TA List), and is composed of one or more Tracking Areas (TAs). The number of access nodes serving the registration area of the user terminal may reach several hundred. If the connection of these access nodes is randomly distributed in each interface signaling processing entity of the mobility management network element, the user signaling processing entity is initiating. When paging, it may be necessary to send a paging message to each of the hundreds of interface signaling processing entities. Assume that there are 200 access nodes in the user registration area, and the system has a total of 100 interface signaling processing entities. The user signaling processing entity sends a paging message to all interface signaling processing entities, and the interface signaling processing entity sends a paging message to 200 access nodes in the registration area, and the paging process moves the management network. The unit needs to process 300 paging messages. Therefore, the MME in the conventional technology allocates an interface signaling processing entity to the access node, so that the MME may need to traverse all the interface signaling processing entities when paging according to the registration area, thereby causing waste of computing resources and reducing effectiveness.
为了解决上述传统技术中移动管理网元为接入节点分配接口信令处理实体的方式造成的移动管理网元在根据注册区域进行寻呼时对资源的浪费，执行效率较低的技术问题，特提出了一种创建链路的方法。该方法的执行可依赖计算机程序，该计算机程序可运行于移动通信网络中的移动管理网元(例如：移动管理实体MME)或具有移动管理网元的功能的计算机系统之上。In order to solve the technical problem that the mobile management network element wastes resources when paging according to the registration area, the mobility management network element allocates an interface signaling processing entity to the access node in the above-mentioned conventional technology, and the technical problem is low. A way to create a link. Execution of the method may rely on a computer program that can run on a mobility management network element (e.g., mobility management entity MME) in a mobile communication network or a computer system having the functionality of a mobility management network element.
在一个实施例中，由图4展示了该创建链路的方法，以下将以一个EPC系统为例详细阐述该方法，具体的，该方法包括：In one embodiment, the method for creating a link is shown in FIG. 4. The method will be described in detail below by taking an EPC system as an example. Specifically, the method includes:
步骤S102，接收接入节点发送的底层链路创建请求。Step S102: Receive an underlying link creation request sent by the access node.
例如，在EPC系统的S1接口的应用场景中，For example, in the application scenario of the S1 interface of the EPC system,
接入节点即为LTE系统中的基站eNodeB。在本实施例中，针对于S1接口的底层链路创建请求可以是SCTP(中文：流控制传输协议，英文：Stream Control Transmission Protocol)链路创建请求；移动管理网元可以是移动管理实体MME。接入节点发起SCTP链路创建请求，发送SCTP初始消息给移动管理实体MME请求建立连接。移动管理实体MME接收到消息后(可通过逻辑上的链路路由实体接收接入节点发起的SCTP链路创建请求)，可根据SCTP链路创建请求获取接入节点的标识信息，该标识信息可以是接入节点的网际互连协议IP地址。The access node is the base station eNodeB in the LTE system. In this embodiment, the underlying link creation request for the S1 interface may be an SCTP (Chinese: Stream Control Transmission Protocol) link creation request; the mobility management network element may be a mobility management entity MME. The access node initiates an SCTP link creation request, and sends an SCTP initial message to the mobility management entity MME to request to establish a connection. After receiving the message, the MME may receive the SCTP link creation request initiated by the access node by using the logical link routing entity, and obtain the identifier information of the access node according to the SCTP link creation request, where the identifier information may be Is the Internet Protocol IP address of the access node.
步骤S104，获取与接入节点对应的第二接口信令处理实体。Step S104: Acquire a second interface signaling processing entity corresponding to the access node.
在本实施例中，接口信令处理实体即为MME用于与接入节点建立SCTP连接的逻辑上的功能实体。In this embodiment, the interface signaling processing entity is a logical functional entity used by the MME to establish an SCTP connection with the access node.
接入节点在首次与MME建立SCTP连接时，MME上不存在为其分配的第二接口信令处理实体(未创建或者未建立接口信令处理实体与接入节点的映 射关系)，因此，会执行步骤S106和步骤S108。When the access node establishes an SCTP connection with the MME for the first time, there is no second interface signaling processing entity assigned to the MME (the interface signaling processing entity and the access node are not created or mapped). The relationship is, therefore, step S106 and step S108 are performed.
步骤S106：为接入节点分配第一接口信令处理实体，通过第一接口信令处理实体与接入节点建立临时的底层链路，通过临时的底层链路接收接入节点发送的应用层连接建立请求，应用层连接建立请求中包含第一位置区域。Step S106: Allocating a first interface signaling processing entity to the access node, establishing a temporary underlying link with the access node by using the first interface signaling processing entity, and receiving an application layer connection sent by the access node by using the temporary lower layer link The request is established, and the application layer connection establishment request includes the first location area.
步骤S108：为接入节点分配对应第一位置区域的第二接口信令处理实体，通知接入节点重建底层链路，重建的底层链路为通过第二接口信令处理实体创建的底层链路。Step S108: Allocating a second interface signaling processing entity corresponding to the first location area to the access node, notifying the access node to reconstruct the underlying link, where the reconstructed underlying link is an underlying link created by the second interface signaling processing entity .
在本实施例中，如前所述，在EPC系统的S1接口的应用场景中，针对于S1接口的底层链路创建请求可以是SCTP请求，MME可以为底层链路创建请求(SCTP链路创建请求)分配第一接口信令处理实体，通过所述分配的第一接口信令处理实体与所述接入节点建立临时的底层链路(临时的SCTP链路)，通过所述第一接口信令处理实体接收由所述临时的底层链路上传的应用层连接创建请求(例如，S1-AP连接创建请求)，根据所述应用层连接创建请求获取与接入节点对应的第一位置区域(在EPC系统中，位置区域可以是跟踪区域TA)，为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体，通知所述接入节点重建底层链路(即重建SCTP链路)。In this embodiment, as described above, in the application scenario of the S1 interface of the EPC system, the underlying link creation request for the S1 interface may be an SCTP request, and the MME may create a request for the underlying link (SCTP link creation). Requesting) assigning a first interface signaling processing entity, and establishing, by the first interface signaling processing entity, a temporary underlying link (temporary SCTP link) with the access node, by using the first interface And causing the processing entity to receive an application layer connection creation request (for example, an S1-AP connection creation request) uploaded by the temporary underlying link, and acquire a first location area corresponding to the access node according to the application layer connection creation request ( In the EPC system, the location area may be a tracking area TA), the second node signaling processing entity corresponding to the first location area is allocated to the access node, and the access node is notified to re-establish the underlying link (ie, reconstruction) SCTP link).
在上例中，第一接口信令处理实体为MME临时为当前发起SCTP链路创建请求的接入节点随机分配的接口信令处理实体。接入节点先与临时分配的第一接口信令处理实体建立第一SCTP链路，即临时的S1接口的底层链路，然后根据前述的图2展示的传统技术中接入节点和移动管理实体之间的接口协议，通过第一SCTP链路发送S1接口应用层连接创建请求，例如，在本实施例中，可以是S1接口应用协议(S1-AP)连接创建请求，接入节点通过该S1接口应用协议连接创建请求向MME上传第一跟踪区域TA。In the above example, the first interface signaling processing entity is an interface signaling processing entity that the MME temporarily allocates randomly for the access node that currently initiates the SCTP link creation request. The access node first establishes a first SCTP link with the temporarily allocated first interface signaling processing entity, that is, the underlying link of the temporary S1 interface, and then according to the conventional technology shown in FIG. 2, the access node and the mobility management entity The S1 interface application layer connection creation request is sent by the first SCTP link. For example, in this embodiment, the S1 interface application protocol (S1-AP) connection creation request is obtained, and the access node passes the S1. The interface application protocol connection creation request uploads the first tracking area TA to the MME.
跟踪区域TA是LTE系统中的位置概念。接入节点服务的位置区域通过跟踪区域TA标识。The tracking area TA is a location concept in the LTE system. The location area of the access node service is identified by the tracking area TA.
接入节点在临时建立的第一SCTP链路上通过S1-AP连接创建请求携带跟踪区域TA(即第一位置区域)之后，MME存储接入节点的标识以及相应的 跟踪区域TA，然后为该接入节点分配与跟踪区域TA对应的第二接口信令处理实体。After the access node creates the request carrying the tracking area TA (ie, the first location area) through the S1-AP connection on the temporarily established first SCTP link, the MME stores the identifier of the access node and the corresponding The area TA is tracked, and then the access node is assigned a second interface signaling processing entity corresponding to the tracking area TA.
也就是说，第二接口信令处理实体为MME实际分配的用于与接入节点之间建立实际数据传输的第二SCTP链路的接口信令处理实体，而第一接口信令处理实体为MME临时分配的用于与接入节点建立临时发送接入节点的跟踪区域TA的第一SCTP链路的接口信令处理实体。That is, the second interface signaling processing entity is an interface signaling processing entity that is actually allocated by the MME for establishing a second SCTP link for actual data transmission with the access node, and the first interface signaling processing entity is An interface signaling processing entity temporarily allocated by the MME for establishing a first SCTP link of the tracking area TA of the temporary transmission access node with the access node.
MME在分配与接入节点发送的跟踪区域TA对应的第二接口信令处理实体时，分配对应相同跟踪区域TA的接口信令处理实体。例如，若MME已创建的某个接口信令处理实体已分配给多个接入节点，则该多个接入节点发送的跟踪区域TA相同，且当再次有接入节点接入，并与MME建立了临时的第一SCTP链路，通过S1接口应用层连接创建请求发送了第一跟踪区域TA之后，MME在为该接入节点分配第二接口信令处理实体时，则会查找所有与该上传的第一跟踪区域TA对应的接口信令处理实体，然后在查找到的接口信令处理实体中为该接入节点分配第二接口信令处理实体。The MME allocates an interface signaling processing entity corresponding to the same tracking area TA when allocating the second interface signaling processing entity corresponding to the tracking area TA sent by the access node. For example, if an interface signaling processing entity that has been created by the MME has been allocated to multiple access nodes, the tracking areas TA sent by the multiple access nodes are the same, and when there is an access node access again, and the MME A temporary first SCTP link is established, and after the first tracking area TA is sent through the S1 interface application layer connection creation request, when the MME allocates the second interface signaling processing entity to the access node, it searches for all the The interface signaling processing entity corresponding to the uploaded first tracking area TA, and then assigning the second interface signaling processing entity to the access node in the found interface signaling processing entity.
优选的，为了更好地减轻接口信令处理实体的负载压力，同一个跟踪区域TA还可对应多个接口信令处理实体(数量较少)，也可以认为同一个跟踪区域TA可对应一个接口信令处理实体集合，在为接入节点分配与TA对应的第二接口信令处理实体时，可先通过查找找到该跟踪区域TA对应的接口信令处理实体集合，然后在接口信令处理实体集合中选取第二接口信令处理实体。Preferably, in order to better reduce the load pressure of the interface signaling processing entity, the same tracking area TA may also correspond to multiple interface signaling processing entities (the number is small), and the same tracking area TA may be considered to correspond to one interface. The signaling processing entity set, when the second interface signaling processing entity corresponding to the TA is allocated to the access node, may first find the interface signaling processing entity set corresponding to the tracking area TA, and then perform the interface signaling processing entity The second interface signaling processing entity is selected in the set.
具体的，MME可获取所述第一位置区域的标识，根据对该标识进行取模得到的值为所述接入节点分配第二接口信令处理实体。例如，在上例中，第一位置区域即为跟踪区TA，第一位置区域的标识即为跟踪区标识(英文：Tracking Area Identity，简称：TAI)，TAI由PLMN(英文：Public Land Mobile Network，中文：公共陆地移动网络)和TAC(英文：Tracking Area Code，中文：跟踪区域编码)组成。因此TAI为一串数字编号，可通过对其取模得到的值在接口信令处理实体集合中选取作为接入节点的第二接口信令处理实体。 Specifically, the MME may obtain the identifier of the first location area, and allocate a second interface signaling processing entity to the access node according to the value obtained by modulating the identifier. For example, in the above example, the first location area is the tracking area TA, the identifier of the first location area is the tracking area identifier (English: Tracking Area Identity, TAI for short), and the TAI is defined by the PLMN (English: Public Land Mobile Network) , Chinese: Public Land Mobile Network) and TAC (English: Tracking Area Code, Chinese: Tracking Area Code). Therefore, the TAI is a serial number, and the second interface signaling processing entity that is the access node can be selected in the interface signaling processing entity set by the value obtained by modulating the TAI.
若没有查找到，则可随机分配一个接口信令处理实体作为接入节点对应的第二接口信令处理实体。If not found, an interface signaling processing entity may be randomly allocated as the second interface signaling processing entity corresponding to the access node.
在上例中，MME为所述接入节点分配对应所述第一TA的第二接口信令处理实体之后，即可通知所述接入节点重建S1接口上的SCTP链路。具体的，MME在接收到接入节点通过第一SCTP链路发送的应用层连接创建请求(例如，可以是S1-AP连接创建请求)之后，可向接入节点返回应用层连接建立拒绝消息，且应用层连接拒绝消息中包含有预定义为重连的标识符，重连接标识符用于指示接入节点重建底层链路。In the above example, after the MME allocates the second interface signaling processing entity corresponding to the first TA, the MME may notify the access node to reestablish the SCTP link on the S1 interface. Specifically, after receiving the application layer connection creation request (for example, the S1-AP connection creation request) sent by the access node by using the first SCTP link, the MME may return an application layer connection establishment rejection message to the access node, where And the application layer connection reject message includes an identifier that is predefined to be reconnected, and the reconnection identifier is used to instruct the access node to rebuild the underlying link.
也就是说，在上例中，接入节点与MME建立起临时传输跟踪区域TA(第一位置区域)作用的第一SCTP链路(临时的底层链路)，使得接入节点能够通过该第一SCTP链路发起S1接口的应用层连接创建请求。MME在通过该S1接口的应用层连接创建请求得到了第一跟踪区域TA，并分配了第二接口信令处理实体之后，则可向接入节点返回S1-AP连接拒绝消息(即为应用层连接建立拒绝消息)，且S1-AP连接拒绝消息中包含有预定义为重连的标识符。接入节点接收到该S1-AP连接拒绝消息后，则通过该重连接标识符即可再次发起SCTP链路创建请求(即一种S1接口的底层链路创建请求)从而重连。在具体实现中，该重连接标识符可以是现有的S1链路建立拒绝消息中原因值信元，可增加一个枚举来作为预定义为重连的特定原因值，也可以新增信元作为预定义为重连的标识符。That is to say, in the above example, the access node and the MME establish a first SCTP link (temporary underlying link) that acts as a temporary transmission tracking area TA (first location area), so that the access node can pass the first An SCTP link initiates an application layer connection creation request for the S1 interface. After the MME obtains the first tracking area TA through the application layer connection creation request of the S1 interface, and allocates the second interface signaling processing entity, the MME may return an S1-AP connection reject message to the access node (ie, an application layer). The connection establishment reject message), and the S1-AP connection reject message contains an identifier pre-defined as reconnect. After the access node receives the S1-AP connection reject message, the SCTP link creation request (ie, an underlying link creation request of the S1 interface) can be re-initiated by the reconnection identifier to be reconnected. In a specific implementation, the reconnection identifier may be a cause value cell in an existing S1 link setup reject message, and an enumeration may be added as a specific cause value predefined as reconnection, or a cell may be added. As an identifier pre-defined as reconnected.
接入节点重连时，仍然会发起底层链路创建请求，因此移动管理网元仍然会由上述步骤S102起始执行，并在步骤S104时判断是否获取到了接入节点对应的第二接口信令处理实体，且由于已经为该接入节点分配了第二接口信令处理实体，因此，可查找到与所述接入节点的标识对应的预分配的第二接口信令处理实体，因此，可执行步骤S110。When the access node is reconnected, the underlying link creation request is still initiated. Therefore, the mobility management network element is still started by the foregoing step S102, and it is determined in step S104 whether the second interface signaling corresponding to the access node is obtained. Processing the entity, and since the second interface signaling processing entity has been allocated to the access node, the pre-allocated second interface signaling processing entity corresponding to the identifier of the access node may be found, and thus, Step S110 is performed.
步骤S110：通过所述第二接口信令处理实体与所述接入节点建立底层链路。在本实施例中，即通过所述查找到的第二接口信令处理实体与所述接入节 点建立第二SCTP链路，通过所述第二SCTP链路发起S1-AP连接创建请求。Step S110: Establish an underlying link with the access node by using the second interface signaling processing entity. In this embodiment, the processing entity and the access section are processed by the discovered second interface signaling. The point establishes a second SCTP link, and initiates an S1-AP connection creation request through the second SCTP link.
由于已经为接入节点分配了第二接口信令处理实体，因此，MME可通过第二接口信令处理实体创建与接入节点的第二SCTP链路(MME与接入节点之间传输数据的链路，非临时的传输链路)，然后再由接入节点通过该第二SCTP链路发起S1接口的应用层连接创建请求。Since the second interface signaling processing entity has been allocated to the access node, the MME may create a second SCTP link with the access node through the second interface signaling processing entity (data transmission between the MME and the access node) The link, the non-temporary transmission link, is then initiated by the access node through the second SCTP link to initiate an application layer connection creation request for the S1 interface.
在本方法中，MME在接收到SCTP链路(S1接口上的底层链路)创建请求之后，可采用两种方式查找是否已为发起该SCTP链路创建请求的接入节点分配了第二接口信令处理实体。In the method, after receiving the SCTP link (the underlying link on the S1 interface) creation request, the MME may find two ways to allocate the second interface to the access node that initiated the SCTP link creation request. Signaling processing entity.
方式一：在为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体时，MME存储接入节点的标识与分配的第二接口信令处理实体的映射关系；MME获取与所述接入节点对应的第二接口信令处理实体的方式为：根据所述映射关系查找与所述接入节点的标识对应的第二接口信令处理实体。Manner 1: When the second interface signaling processing entity corresponding to the first location area is allocated to the access node, the MME stores a mapping relationship between the identifier of the access node and the allocated second interface signaling processing entity; The method for obtaining the second interface signaling processing entity corresponding to the access node is: searching for a second interface signaling processing entity corresponding to the identifier of the access node according to the mapping relationship.
方式二：在为接入节点分配对应第一位置区域的第二接口信令处理实体时，生成与所述第二接口信令处理实体对应的令牌标识；Manner 2: generating a token identifier corresponding to the second interface signaling processing entity when the second interface signaling processing entity corresponding to the first location area is allocated to the access node;
在向接入节点返回应用层连接建立拒绝消息时，在所述应用层连接建立拒绝消息中携带所述令牌标识，所述接入节点在重建底层链路时在发起的底层链路创建请求中携带所述令牌标识。When the application layer connection establishment rejection message is returned to the access node, the application identifier is carried in the application layer connection establishment reject message, and the access node initiates the underlying link creation request when reestablishing the underlying link. The token identifier is carried in the middle.
在该方式中，MME获取与接入节点对应的第二接口信令处理实体的方式为：获取底层链路创建请求中包含的令牌标识，根据令牌标识查找或计算得到与接入节点对应的第二接口信令处理实体。In this manner, the MME obtains the second interface signaling processing entity corresponding to the access node by acquiring the token identifier included in the underlying link creation request, and searching or calculating according to the token identifier to obtain the corresponding corresponding to the access node. The second interface signaling processing entity.
以下以两个实施例详述上述两种方式下建立S1-AP连接的过程：The following describes the process of establishing an S1-AP connection in the above two modes in two embodiments:
实施例一 Embodiment 1
在本实施例中，基于EPC系统中的S1接口的应用场景，可参考图5所示的建立S1-AP连接的时序过程，具体的，逻辑上包含了链路路由实体和多个接口信令处理实体的MME可执行：In this embodiment, based on the application scenario of the S1 interface in the EPC system, reference may be made to the sequence process for establishing an S1-AP connection as shown in FIG. 5, specifically, logically including a link routing entity and multiple interface signaling. The MME that processes the entity can execute:
步骤1.接入节点发起SCTP链路建立，发送SCTP初始消息给MME。 Step 1. The access node initiates an SCTP link setup and sends an SCTP initial message to the MME.
步骤2.MME的链路路由实体收到消息后，根据负荷分担等原则，随机选择一个接口信令处理实体作为第一接口信令处理实体。Step 2. After receiving the message, the link routing entity of the MME randomly selects an interface signaling processing entity as the first interface signaling processing entity according to the principle of load sharing.
步骤3.MME通过第一接口信令处理实体向接入节点回复SCTP初始响应等消息，完成临时的第一SCTP链路(临时的底层链路)的建立。Step 3. The MME returns a message such as an initial SCTP response to the access node through the first interface signaling processing entity, and completes establishment of the temporary first SCTP link (temporary underlying link).
步骤4.接入节点发送S1接口的应用层连接创建请求给MME的第一接口信令处理实体，消息中携带接入节点支持的跟踪区域TA(即第一位置区域)，接入节点可以支持一个或者多个跟踪区域，接入节点将所有支持的跟踪区域都携带在消息中。Step 4: The access node sends an application layer connection request of the S1 interface to the first interface signaling processing entity of the MME, where the message carries the tracking area TA supported by the access node (ie, the first location area), and the access node can support One or more tracking areas, the access node carries all supported tracking areas in the message.
MME根据接入节点支持的跟踪区域TA，为该接入节点预分配第二接口信令处理实体。分配的原则是服务同一个跟踪区域TA的接入节点尽量连接在一个或者少数几个接口信令处理实体上。例如，MME可以根据跟踪区域TA取模来获得接口信令处理实体号，该接口信令处理实体即为第二接口信令处理实体。然后存储接入节点的标识(例如接入节点eNodeB的IP地址)与分配的第二接口信令处理实体的映射关系。The MME pre-allocates the second interface signaling processing entity to the access node according to the tracking area TA supported by the access node. The principle of allocation is that the access nodes serving the same tracking area TA are connected as much as possible to one or a few interface signaling processing entities. For example, the MME may obtain the interface signaling processing entity number according to the tracking area TA modulo, and the interface signaling processing entity is the second interface signaling processing entity. A mapping relationship between the identity of the access node (e.g., the IP address of the access node eNodeB) and the assigned second interface signaling processing entity is then stored.
步骤5.MME向接入节点发送S1接口的应用层连接拒绝(S1 SETUP REJECT)消息，消息中携带重连接标识符(可以是现有的S1链路建立拒绝消息中原因值信元，可增加一个枚举来作为预定义为重连的特定原因值，也可以新增信元作为预定义为重连的标识符)。 Step 5. The MME sends an S1 SETUP REJECT message to the access node, where the message carries a reconnection identifier (which may be a cause value cell in the existing S1 link establishment reject message, which may be increased. An enumeration is used as a specific cause value that is predefined as reconnect, and a new cell can be added as an identifier pre-defined as reconnected.
步骤6.接入节点或移动管理网元拆除第1步建立的第一SCTP链路。Step 6. The access node or the mobility management network element removes the first SCTP link established in step 1.
步骤7.接入节点根据重连接标识符重新发起SCTP链路建立。 Step 7. The access node re-initiates the SCTP link setup based on the reconnection identifier.
步骤8.MME根据存储的映射关系查找为该接入节点预分配的第二接口信令处理实体。Step 8. The MME searches for a second interface signaling processing entity pre-allocated for the access node according to the stored mapping relationship.
步骤9.第二接口信令处理实体回复响应消息，完成第二SCTP链路建立。Step 9. The second interface signaling processing entity returns a response message to complete the second SCTP link establishment.
步骤10.接入节点发送S1接口的应用层连接创建请求完成接入节点的注册。Step 10. The access node sends an application layer connection creation request of the S1 interface to complete the registration of the access node.
步骤11.MME通过第二接口信令处理实体回复响应消息，完成S1-AP连 接建立。 Step 11. The MME processes the entity reply response message through the second interface signaling, and completes the S1-AP connection. Connected to establish.
实施例二Embodiment 2
在本实施例中，基于EPC系统中的S1接口的应用场景，可参考图5所示的建立S1-AP链路的时序过程，具体的，逻辑上包含了链路路由实体和多个接口信令处理实体的MME可执行：In this embodiment, based on the application scenario of the S1 interface in the EPC system, reference may be made to the sequence process of establishing an S1-AP link as shown in FIG. 5, specifically, logically including a link routing entity and multiple interface letters. Let the MME of the processing entity execute:
步骤1.接入节点发起SCTP链路建立，发送SCTP初始消息给MME。 Step 1. The access node initiates an SCTP link setup and sends an SCTP initial message to the MME.
步骤2.MME的链路路由实体收到消息后，根据负荷分担等原则，随机选择一个接口信令处理实体作为第一接口信令处理实体。Step 2. After receiving the message, the link routing entity of the MME randomly selects an interface signaling processing entity as the first interface signaling processing entity according to the principle of load sharing.
步骤3.MME通过第一接口信令处理实体向接入节点回复SCTP初始响应等消息，完成临时的第一SCTP链路(临时的底层链路)的建立。Step 3. The MME returns a message such as an initial SCTP response to the access node through the first interface signaling processing entity, and completes establishment of the temporary first SCTP link (temporary underlying link).
步骤4.接入节点发送S1-AP连接建立请求给MME的第一接口信令处理实体，消息中携带接入节点支持的跟踪区域TA(即第一位置区域)，接入节点可以支持一个或者多个跟踪区域，接入节点将所有支持的跟踪区域都携带在消息中。Step 4: The access node sends an S1-AP connection setup request to the first interface signaling processing entity of the MME, where the message carries the tracking area TA supported by the access node (ie, the first location area), and the access node may support one or Multiple tracking areas, the access node carries all supported tracking areas in the message.
MME根据接入节点支持的跟踪区域TA，为该接入节点预分配第二接口信令处理实体。分配的原则是服务同一个跟踪区域TA的接入节点尽量连接在一个或者少数几个接口信令处理实体上。例如，MME可以根据跟踪区域TA取模来获得接口信令处理实体号，该接口信令处理实体即为第二接口信令处理实体。The MME pre-allocates the second interface signaling processing entity to the access node according to the tracking area TA supported by the access node. The principle of allocation is that the access nodes serving the same tracking area TA are connected as much as possible to one or a few interface signaling processing entities. For example, the MME may obtain the interface signaling processing entity number according to the tracking area TA modulo, and the interface signaling processing entity is the second interface signaling processing entity.
步骤5.MME向接入节点发送S1-AP连接建立拒绝(S1 SETUP REJECT)消息，消息中携带重连接标识符以及与第二接口信令处理实体对应的令牌标识。Step 5: The MME sends an S1-AP Connection Rejection (S1 SETUP REJECT) message to the access node, where the message carries a reconnection identifier and a token identifier corresponding to the second interface signaling processing entity.
步骤6.接入节点或移动管理网元拆除第1步建立的第一SCTP链路。Step 6. The access node or the mobility management network element removes the first SCTP link established in step 1.
步骤7.接入节点根据重连接标识符重新发起SCTP连接建立，消息中包含有第二接口信令处理实体对应的令牌标识。 Step 7. The access node re-initiates the SCTP connection establishment according to the reconnection identifier, and the message includes the token identifier corresponding to the second interface signaling processing entity.
步骤8.MME根据令牌标识查找(MME预存第二接口信令处理实体和分配的令牌标识的映射关系，MME在接收到令牌标识之后，根据该映射关系查 找令牌标识对应的第二接口信令处理实体)或计算(将第二接口信令处理实体在MME中的编号编码成令牌标识，MME在接收到令牌标识之后，对其进行解码，即可获取到相应的第二接口信令处理实体)得到为该接入节点预分配的第二接口信令处理实体。Step 8. The MME searches for the token identifier (the MME pre-stores the mapping relationship between the second interface signaling processing entity and the assigned token identifier. After receiving the token identifier, the MME checks the mapping relationship according to the mapping relationship. The second interface signaling processing entity corresponding to the token identifier is searched or calculated (the number of the second interface signaling processing entity in the MME is encoded into a token identifier, and the MME decodes the token identifier after receiving the token identifier, The corresponding second interface signaling processing entity is obtained, and the second interface signaling processing entity pre-allocated for the access node is obtained.
步骤9.第二接口信令处理实体回复响应消息，完成第二SCTP链路建立。Step 9. The second interface signaling processing entity returns a response message to complete the second SCTP link establishment.
步骤10.接入节点发送S1-AP连接建立请求消息完成接入节点的注册。Step 10. The access node sends an S1-AP connection setup request message to complete the registration of the access node.
步骤11.MME通过第二接口信令处理实体回复响应消息，完成S1-AP连接建立。 Step 11. The MME processes the entity reply response message through the second interface signaling, and completes the S1-AP connection establishment.
进一步的，在一个实施例中，接入节点上支持的位置区域可能发生更新，当接入节点支持的位置区域发生变化时，即可将更新的第二位置区域发送给移动管理网元。移动管理网元通过已创建的底层链路(例如前述应用场景中的第二SCTP链路)接收位置区域更新请求之后，可根据位置区域更新请求获取该第二位置区域，重新根据第二位置区域为接入节点分配第二接口信令处理实体，通知接入节点重建底层链路。Further, in an embodiment, the location area supported by the access node may be updated, and when the location area supported by the access node changes, the updated second location area may be sent to the mobility management network element. After receiving the location area update request by using the created underlying link (for example, the second SCTP link in the foregoing application scenario), the mobility management network element may acquire the second location area according to the location area update request, and re-based the second location area. The second node signaling processing entity is allocated to the access node, and the access node is notified to re-establish the underlying link.
如上例中的EPC系统的应用场景中，接入节点支持的跟踪区TA发生变化后，通过已建立的第二SCTP链路上的S1-AP连接发送第二跟踪区TA至MME，MME则根据更新的第二跟踪区TA重新为接入节点分配第二接口信令处理实体，通知接入节点重建SCTP链路之后，MME再次接收到该接入节点发起的SCTP链路创建请求，由于存在重新分配的第二接口信令处理实体，因此能够查找到与接入节点对应的第二接口信令处理实体，从而可通过重新分配的第二接口信令处理实体与接入节点重新建立第二SCTP链路，进而完成更新跟踪区域TA之后的S1-AP连接的建立。In the application scenario of the EPC system in the foregoing example, after the tracking area TA supported by the access node changes, the second tracking area TA to the MME is sent through the established S1-AP connection on the second SCTP link, and the MME is configured according to The updated second tracking area TA re-allocates the second interface signaling processing entity to the access node, and after notifying the access node to re-establish the SCTP link, the MME receives the SCTP link creation request initiated by the access node again, due to the existence of the re-establishment Assigning the second interface signaling processing entity, so that the second interface signaling processing entity corresponding to the access node can be found, so that the second SCTP can be re-established by the redistributed second interface signaling processing entity and the access node The link, in turn, completes the establishment of the S1-AP connection after updating the tracking area TA.
也就是说，在经过上述步骤S102至S108的步骤成功建立了S1-AP连接之后，即使接入节点支持的位置区域发生变化，也可通过重新向移动管理网元发送位置区域更新请求重新分配第二接口信令处理实体，从而提高了系统的扩展性。 That is, after the S1-AP connection is successfully established through the steps S102 to S108 described above, even if the location area supported by the access node changes, the location area update request may be re-allocated by re-sending the mobile management network element. The two interface signaling processing entity improves the scalability of the system.
进一步的，在一个实施例中，移动管理网元还可根据业务需要对接入节点管辖下的目标用户终端UE进行寻呼，具体为：获取目标用户终端UE的注册区域，查找与注册区域对应的接口信令处理实体，向查找到的接口信令处理实体发起与目标UE对应的寻呼请求。Further, in an embodiment, the mobility management network element may also perform paging on the target user terminal UE under the jurisdiction of the access node according to the service requirement, specifically: acquiring the registration area of the target user terminal UE, and searching for the corresponding area corresponding to the registration area. The interface signaling processing entity initiates a paging request corresponding to the target UE to the found interface signaling processing entity.
如上例中的EPC系统的应用场景中，MME可先获取需要被寻呼的处于空闲状态的目标用户终端UE的跟踪区TA(即UE的注册区域)，其数量可以是一个或者多个TA，然后在MME自身系统中查找与该位置区域中的所有TA对应的接入节点，通过接入节点查找已经分配的一个或多个与该接入节点对应的接口信令处理实体，然后通过查找到的接口信令处理实体发送寻呼请求。由于前述步骤S102至步骤S108的执行，使得MME分配接口信令处理实体的方式并不是纯随机分配，而是由一个接口信令处理实体或少量个数接口信令处理实体构成的集合来匹配所有同一TA的接入节点，因此，MME在寻呼时，并不需要遍历所有接口信令处理实体，而只需要在与接入节点对应的接口信令处理实体上进行寻呼即可，从而减少了不必要的呼叫次数，提高了执行效率。In the application scenario of the EPC system in the foregoing example, the MME may first acquire the tracking area TA (ie, the registration area of the UE) of the target user terminal UE in the idle state that needs to be paged, and the number may be one or more TAs. Then, in the MME system, the access node corresponding to all the TAs in the location area is searched, and the access node searches for one or more interface signaling processing entities corresponding to the access node, and then finds The interface signaling processing entity sends a paging request. Due to the foregoing steps S102 to S108, the manner in which the MME allocates the interface signaling processing entity is not a purely random allocation, but a set consisting of one interface signaling processing entity or a small number of interface signaling processing entities to match all The access node of the same TA, therefore, the MME does not need to traverse all the interface signaling processing entities when paging, but only needs to perform paging on the interface signaling processing entity corresponding to the access node, thereby reducing The number of unnecessary calls increases the efficiency of execution.
进一步的，在一个实施例中，如图7所示，接入节点还可向移动管理网元发送节点能力通知消息，该节点能力通知消息即为该接入节点是否支持重建底层链路的能力的配置消息，包含有所述接入节点是否支持重建底层链路的标识符。节点能力通知消息具体可以为S1接口应用层连接创建请求消息或者接入节点配置更新消息等接入节点和MME之间的接口消息。移动管理网元在通知接入节点重建底层链路之前还可判断所述接入节点是否支持重建链路，若是，则执行所述通知所述接入节点重建底层链路的步骤。Further, in an embodiment, as shown in FIG. 7, the access node may further send a node capability notification message to the mobility management network element, where the node capability notification message is the capability of the access node to support reconstruction of the underlying link. The configuration message includes an identifier of whether the access node supports rebuilding the underlying link. The node capability notification message may specifically be an interface message between the access node and the MME, such as an S1 interface application layer connection creation request message or an access node configuration update message. The mobility management network element may further determine whether the access node supports the reestablishment link before notifying the access node to re-establish the underlying link, and if yes, performing the step of notifying the access node to re-establish the underlying link.
该重建SCTP链路的能力的信息可以配置在接入节点上，也可以通过其他网元，如操作维护单元(英文：Operation and Maintenance，中文：OAM)等发送给接入节点。The information about the capability of the SCTP link can be configured on the access node, or can be sent to the access node through other network elements, such as Operation and Maintenance (English: OAM).
其中，在一个EPC系统的应用场景中，具体是否支持重建SCTP链路的标识符可以由以下之一来定义： In an application scenario of an EPC system, whether an identifier supporting a reestablished SCTP link can be defined by one of the following:
接入节点在发送给MME的节点能力通知消息中携带指示标识符，指示接入节点支持重建SCTP链路。若节点能力通知消息中没有携带指示标识符，表示接入节点不支持连接重建。The access node carries an indication identifier in the node capability notification message sent to the MME, indicating that the access node supports reestablishing the SCTP link. If the node capability notification message does not carry the indication identifier, it indicates that the access node does not support connection reestablishment.
接入节点在发送给MME的节点能力通知消息中携带指示标识符，指示接入节点不支持重建SCTP链路。若节点能力通知消息中没有携带指示标识符，表示接入节点支持连接重建。The access node carries an indication identifier in the node capability notification message sent to the MME, indicating that the access node does not support reestablishing the SCTP link. If the node capability notification message does not carry the indication identifier, it indicates that the access node supports connection reestablishment.
接入节点在发送给移动管理网元的节点能力通知消息中携带指示标识符，指示标识符具有两个枚举类型，分别指示接入节点支持或者不支持连接重建。The access node carries an indication identifier in the node capability notification message sent to the mobility management network element, and the indication identifier has two enumerated types, respectively indicating that the access node supports or does not support connection reestablishment.
上述节点能力通知消息中携带的标识符可以通过新增信元或者扩展信元实现。The identifier carried in the node capability notification message may be implemented by adding a cell or an extension cell.
为了解决上述传统技术中移动管理网元为接入节点分配接口的方式造成的移动管理网元在根据位置区域进行寻呼时对资源的浪费，执行效率较低的技术问题，如图8所示，特提出了一种S1接口链路的创建装置，包括：请求接收模块102、临时链路建立模块104、第二接口分配模块106，其中：In order to solve the problem that the mobile management network element wastes resources when paging according to the location area caused by the manner in which the mobile management network element allocates an interface to the access node in the above-mentioned conventional technology, the technical problem of low execution efficiency is as shown in FIG. 8 . An apparatus for creating an S1 interface link is provided, including: a request receiving module 102, a temporary link establishing module 104, and a second interface assigning module 106, wherein:
请求接收模块102，用于接收接入节点发送的底层链路创建请求；The request receiving module 102 is configured to receive an underlying link creation request sent by the access node;
临时链路建立模块104，用于为所述接入节点分配第一接口信令处理实体，通过所述第一接口信令处理实体与所述接入节点建立临时的底层链路，通过所述临时的底层链路接收所述接入节点发送的应用层连接建立请求，所述应用层连接建立请求中包含第一位置区域；The temporary link establishing module 104 is configured to allocate a first interface signaling processing entity to the access node, and establish, by the first interface signaling processing entity, a temporary underlying link with the access node, by using the The temporary underlying link receives an application layer connection establishment request sent by the access node, where the application layer connection establishment request includes a first location area;
第二接口分配模块106，用于为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体，通知所述接入节点重建底层链路，所述重建的底层链路为通过所述第二接口信令处理实体创建的底层链路。a second interface allocating module 106, configured to allocate, by the access node, a second interface signaling processing entity corresponding to the first location area, to notify the access node to reconstruct an underlying link, and the reconstructed underlying link The underlying link created by the second interface signaling processing entity.
在一个实施例中，第二接口分配模块106还用于向所述接入节点返回应用层连接建立拒绝消息，且所述应用层连接建立拒绝消息中包含重连接标识符，所述重连接标识符用于指示所述接入节点重建底层链路。In an embodiment, the second interface assignment module 106 is further configured to return an application layer connection establishment reject message to the access node, and the application layer connection establishment reject message includes a reconnection identifier, the reconnection identifier The symbol is used to instruct the access node to rebuild the underlying link.
在一个实施例中，如图8所示，该装置还包括第二接口获取模块108，用 于获取与所述接入节点对应的第二接口信令处理实体，在获取到已为所述接入节点分配第二接口信令处理实体时，通过所述第二接口信令处理实体与所述接入节点建立底层链路。In an embodiment, as shown in FIG. 8, the device further includes a second interface obtaining module 108, Obtaining, by the second interface, the signaling processing entity corresponding to the access node, when the second interface signaling processing entity has been allocated to the access node, processing the entity and the The access node establishes an underlying link.
在一个实施例中，第二接口分配模块106还用于生成与所述第二接口信令处理实体对应的令牌标识；以及向所述接入节点返回应用层连接建立拒绝消息，在所述应用层连接建立拒绝消息中包含所述令牌标识，所述接入节点在重建底层链路时在发起的底层链路创建请求中包含所述令牌标识。In an embodiment, the second interface assignment module 106 is further configured to generate a token identifier corresponding to the second interface signaling processing entity; and return an application layer connection establishment reject message to the access node, where The application layer connection establishment rejection message includes the token identifier, and the access node includes the token identifier in the initiated underlying link creation request when rebuilding the underlying link.
在一个实施例中，第二接口获取模块108还用于获取所述底层链路创建请求中包含的令牌标识，根据所述令牌标识查找或计算得到与所述接入节点对应的第二接口信令处理实体。In an embodiment, the second interface obtaining module 108 is further configured to acquire a token identifier included in the underlying link creation request, and obtain a second corresponding to the access node according to the token identifier search or calculation. Interface signaling processing entity.
在一个实施例中，第二接口分配模块106还用于存储所述接入节点与所述分配的第二接口信令处理实体的映射关系。第二接口获取模块108还用于根据所述映射关系查找与所述接入节点对应的第二接口信令处理实体。In an embodiment, the second interface allocation module 106 is further configured to store a mapping relationship between the access node and the allocated second interface signaling processing entity. The second interface obtaining module 108 is further configured to search, according to the mapping relationship, a second interface signaling processing entity corresponding to the access node.
在一个实施例中，如图8所示，该装置还包括位置区域更新模块110，用于接收上传的位置区域更新请求，根据所述位置区域更新请求获取第二位置区域，重新根据所述第二位置区域为所述接入节点分配第二接口信令处理实体，通知所述接入节点重建底层链路。In an embodiment, as shown in FIG. 8, the apparatus further includes a location area update module 110, configured to receive an uploaded location area update request, and obtain a second location area according to the location area update request, according to the The two-location area allocates a second interface signaling processing entity to the access node, and notifies the access node to re-establish the underlying link.
在一个实施例中，第二接口分配模块106用于获取所述第一位置区域的标识，根据对所述标识进行取模得到的值为所述接入节点分配第二接口信令处理实体。In an embodiment, the second interface allocation module 106 is configured to obtain an identifier of the first location area, and allocate a second interface signaling processing entity to the access node according to a value obtained by modulating the identifier.
在一个实施例中，接入节点的标识为所述接入节点的网际互连协议IP地址。In one embodiment, the identity of the access node is an internetworking protocol IP address of the access node.
在一个实施例中，如图8所示，该装置还包括寻呼模块112，用于获取目标用户终端UE的注册区域，查找与所述注册区域对应的接口信令处理实体，向所述查找到的接口信令处理实体发起与所述目标UE对应的寻呼请求。In an embodiment, as shown in FIG. 8, the apparatus further includes a paging module 112, configured to acquire a registration area of the target user terminal UE, and search for an interface signaling processing entity corresponding to the registration area, to perform the searching. The incoming interface signaling processing entity initiates a paging request corresponding to the target UE.
在一个实施例中，如图8所示，该装置还包括节点能力通知消息接收模块 114，用于接收所述接入节点发送的节点能力通知消息，所述节点能力通知消息中包含有所述接入节点是否支持重建链路的标识符。第二接口分配模块106用于在所述接入节点支持重建链路时，通知所述接入节点重建底层链路。In one embodiment, as shown in FIG. 8, the apparatus further includes a node capability notification message receiving module. 114. The node capability notification message sent by the access node is received, where the node capability notification message includes an identifier of whether the access node supports reestablishing a link. The second interface assignment module 106 is configured to notify the access node to re-establish the underlying link when the access node supports the re-establishment link.
综上所述，实施本发明实施例，将具有如下有益效果：In summary, the implementation of the embodiments of the present invention will have the following beneficial effects:
上述创建链路的方法及装置中，移动管理网元在接收到接入节点发起的底层链路创建请求之后，并没有直接地为其随机地分配一个接口信令处理实体创建用于传输数据的底层链路，而是先为接入节点分配一个临时的第一接口信令处理实体，然后通过该临时的第一接口信令处理实体创建临时的底层链路，由该临时的底层链路获取接入节点在创建应用层连接时发送的第一位置区域，再根据该第一位置区域重新为该接入节点分配与该第一位置区域对应的第二接口信令处理实体，并通知接入节点重建底层链路。在接入节点再次发起底层链路创建请求之后，移动管理网元即可通过已分配的第二接口信令处理实体与接入节点建立稳定的用于传输数据的底层链路。这就使得移动管理网元可根据位置区域快速查找到与该位置区域对应的一个或少数几个接口信令处理实体，在移动管理网元根据业务需求对处于空闲状态的UE进行寻呼时，则可仅向该一个或少数几个接口信令处理实体发送寻呼请求，从而大大减少了不必要的寻呼次数，提高了系统的执行效率。In the foregoing method and device for creating a link, after receiving the underlying link creation request initiated by the access node, the mobility management network element does not directly allocate an interface signaling processing entity for creating data for transmitting data. The underlying link, but first assigns a temporary first interface signaling processing entity to the access node, and then creates a temporary underlying link through the temporary first interface signaling processing entity, and obtains the temporary underlying link. And the first location area that is sent by the access node when the application layer is created, and then the second interface signaling processing entity corresponding to the first location area is re-assigned to the access node according to the first location area, and the access is notified. The node rebuilds the underlying link. After the access node initiates the underlying link creation request again, the mobility management network element can establish a stable underlying link for transmitting data through the allocated second interface signaling processing entity and the access node. The mobile management network element can quickly find one or a few interface signaling processing entities corresponding to the location area according to the location area, and when the mobility management network element pages the UE in the idle state according to the service requirement, The paging request can be sent only to the one or a few interface signaling processing entities, thereby greatly reducing unnecessary paging times and improving system execution efficiency.
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
以上所揭露的仅为本发明较佳实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。 The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims (22)

  1. 一种创建链路的方法，其特征在于，包括：A method for creating a link, comprising:
    接收接入节点发送的底层链路创建请求；Receiving an underlying link creation request sent by the access node;
    为所述接入节点分配第一接口信令处理实体，通过所述第一接口信令处理实体与所述接入节点建立临时的底层链路，通过所述临时的底层链路接收所述接入节点发送的应用层连接建立请求，所述应用层连接建立请求中包含第一位置区域；Allocating a first interface signaling processing entity to the access node, establishing, by the first interface signaling processing entity, a temporary underlying link with the access node, and receiving the connection by using the temporary underlying link An application layer connection establishment request sent by the ingress node, where the application layer connection establishment request includes a first location area;
    为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体，通知所述接入节点重建底层链路，所述重建的底层链路为通过所述第二接口信令处理实体创建的底层链路。Allocating, to the access node, a second interface signaling processing entity corresponding to the first location area, informing the access node to re-establish an underlying link, where the reconstructed underlying link is signaling through the second interface Process the underlying link created by the entity.
  2. 根据权利要求1所述的创建链路的方法，其特征在于，所述通知所述接入节点重建底层链路还包括：The method for creating a link according to claim 1, wherein the notifying the access node to re-establish the underlying link further comprises:
    向所述接入节点返回应用层连接建立拒绝消息，且所述应用层连接建立拒绝消息中包含重连接标识符，所述重连接标识符用于指示所述接入节点重建底层链路。Returning an application layer connection establishment reject message to the access node, and the application layer connection establishment reject message includes a reconnection identifier, where the reconnection identifier is used to instruct the access node to reestablish an underlying link.
  3. 根据权利要求1所述的创建链路的方法，其特征在于，所述接收接入节点发送的底层链路创建请求之后还包括：The method for creating a link according to claim 1, further comprising: after receiving the underlying link creation request sent by the access node,
    获取与所述接入节点对应的第二接口信令处理实体，在获取到已为所述接入节点分配第二接口信令处理实体时，通过所述第二接口信令处理实体与所述接入节点建立底层链路。Obtaining, by the second interface signaling processing entity corresponding to the access node, when the second interface signaling processing entity has been allocated to the access node, by using the second interface signaling processing entity and the The access node establishes the underlying link.
  4. 根据权利要求3所述的创建链路的方法，其特征在于，所述为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体包括：The method for creating a link according to claim 3, wherein the allocating the second interface signaling processing entity corresponding to the first location area to the access node comprises:
    生成与所述第二接口信令处理实体对应的令牌标识；Generating a token identifier corresponding to the second interface signaling processing entity;
    所述通知所述接入节点重建底层链路还包括：The notifying the access node to re-establish the underlying link further includes:
    向所述接入节点返回应用层连接建立拒绝消息，在所述应用层连接建立拒绝消息中包含所述令牌标识，所述接入节点在重建底层链路时在发起的底层链 路创建请求中包含所述令牌标识。Returning, to the access node, an application layer connection establishment reject message, where the application layer connection establishment rejection message includes the token identifier, and the access node initiates an underlying chain when rebuilding the underlying link The token identification is included in the road creation request.
  5. 根据权利要求4所述的创建链路的方法，其特征在于，所述获取与所述接入节点对应的第二接口信令处理实体还包括：The method for creating a link according to claim 4, wherein the acquiring the second interface signaling processing entity corresponding to the access node further comprises:
    获取所述底层链路创建请求中包含的令牌标识，根据所述令牌标识查找或计算得到与所述接入节点对应的第二接口信令处理实体。Obtaining a token identifier included in the underlying link creation request, and searching or calculating, according to the token identifier, a second interface signaling processing entity corresponding to the access node.
  6. 根据权利要求3所述的创建链路的方法，其特征在于，所述为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体包括：The method for creating a link according to claim 3, wherein the allocating the second interface signaling processing entity corresponding to the first location area to the access node comprises:
    获取所述接入节点的标识，存储所述接入节点的标识与所述分配的第二接口信令处理实体的映射关系；Obtaining an identifier of the access node, and storing a mapping relationship between the identifier of the access node and the allocated second interface signaling processing entity;
    所述获取与所述接入节点对应的第二接口信令处理实体还包括：The acquiring the second interface signaling processing entity corresponding to the access node further includes:
    根据所述映射关系查找与所述接入节点的标识对应的第二接口信令处理实体。And searching, according to the mapping relationship, a second interface signaling processing entity corresponding to the identifier of the access node.
  7. 根据权利要求1至6任一项所述的创建链路的方法，其特征在于，所述通过所述第二接口信令处理实体与所述接入节点建立底层链路之后还包括：The method for creating a link according to any one of claims 1 to 6, further comprising: after the establishing, by the second interface, the processing entity and the access node, the following:
    接收上传的位置区域更新请求，根据所述位置区域更新请求获取第二位置区域，重新根据所述第二位置区域为所述接入节点分配第二接口信令处理实体，通知所述接入节点重建底层链路。Receiving the uploaded location area update request, acquiring the second location area according to the location area update request, and re-assigning the second interface signaling processing entity to the access node according to the second location area, and notifying the access node Rebuild the underlying link.
  8. 根据权利要求1至6任一项所述的创建链路的方法，其特征在于，所述为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体为：The method for creating a link according to any one of claims 1 to 6, wherein the assigning the second interface signaling processing entity corresponding to the first location area to the access node is:
    获取所述第一位置区域的标识，根据对所述标识进行取模得到的值为所述接入节点分配第二接口信令处理实体。Obtaining an identifier of the first location area, and assigning, by the value obtained by modulating the identifier, the second interface signaling processing entity to the access node.
  9. 根据权利要求1至6任一项所述的创建链路的方法，其特征在于，所述接入节点的标识为所述接入节点的网际互连协议IP地址。The method for creating a link according to any one of claims 1 to 6, wherein the identifier of the access node is an internetworking protocol IP address of the access node.
  10. 根据权利要求1至6任一项所述的创建链路的方法，其特征在于，所述方法还包括：The method of creating a link according to any one of claims 1 to 6, wherein the method further comprises:
    获取目标用户终端UE的注册区域，查找位置区域与所述注册区域对应的 接口信令处理实体，向所述查找到的接口信令处理实体发起与所述目标UE对应的寻呼请求。Obtaining a registration area of the target user terminal UE, where the search location area corresponds to the registration area The interface signaling processing entity initiates a paging request corresponding to the target UE to the found interface signaling processing entity.
  11. 根据权利要求1至6任一项所述的创建链路的方法，其特征在于，所述方法还包括：The method of creating a link according to any one of claims 1 to 6, wherein the method further comprises:
    接收所述接入节点发送的节点能力通知消息，所述节点能力通知消息中包含有所述接入节点是否支持重建链路的标识符；Receiving, by the access node, a node capability notification message, where the node capability notification message includes an identifier of whether the access node supports reestablishing a link;
    所述通知所述接入节点重建底层链路之前还包括：The notifying the access node before rebuilding the underlying link further includes:
    判断所述接入节点是否支持重建链路，若是，则执行所述通知所述接入节点重建底层链路的步骤。Determining whether the access node supports reestablishing a link, and if so, performing the step of notifying the access node to reestablish an underlying link.
  12. 一种创建链路的装置，其特征在于，包括：A device for creating a link, comprising:
    请求接收模块，用于接收接入节点发送的底层链路创建请求；a request receiving module, configured to receive an underlying link creation request sent by the access node;
    临时链路建立模块，用于为所述接入节点分配第一接口信令处理实体，通过所述第一接口信令处理实体与所述接入节点建立临时的底层链路，通过所述临时的底层链路接收所述接入节点发送的应用层连接建立请求，所述应用层连接建立请求中包含第一位置区域；a temporary link establishing module, configured to allocate a first interface signaling processing entity to the access node, and establish, by using the first interface signaling processing entity, a temporary underlying link with the access node, by using the temporary The bottom layer link receives an application layer connection establishment request sent by the access node, where the application layer connection establishment request includes a first location area;
    第二接口分配模块，用于为所述接入节点分配对应所述第一位置区域的第二接口信令处理实体，通知所述接入节点重建底层链路，所述重建的底层链路为通过所述第二接口信令处理实体创建的底层链路。a second interface allocation module, configured to allocate, by the access node, a second interface signaling processing entity corresponding to the first location area, to notify the access node to re-establish an underlying link, where the reconstructed underlying link is The underlying link created by the entity is processed by the second interface signaling.
  13. 根据权利要求12所述的创建链路的装置，其特征在于，所述第二接口分配模块还用于向所述接入节点返回应用层连接建立拒绝消息，且所述应用层连接建立拒绝消息中包含重连接标识符，所述重连接标识符用于指示所述接入节点重建底层链路。The apparatus for creating a link according to claim 12, wherein the second interface assignment module is further configured to return an application layer connection establishment reject message to the access node, and the application layer connection establishment reject message A reconnection identifier is included, the reconnection identifier being used to instruct the access node to re-establish the underlying link.
  14. 根据权利要求12所述的创建链路的装置，其特征在于，所述装置还包括第二接口获取模块，用于获取与所述接入节点对应的第二接口信令处理实体，在获取到已为所述接入节点分配第二接口信令处理实体时，通过所述第二接口信令处理实体与所述接入节点建立底层链路。 The device for creating a link according to claim 12, wherein the device further comprises a second interface acquiring module, configured to acquire a second interface signaling processing entity corresponding to the access node, where When the second interface signaling processing entity has been allocated to the access node, the second interface signaling processing entity establishes an underlying link with the access node.
  15. 根据权利要求14所述的创建链路的装置，其特征在于，所述第二接口分配模块用于生成与所述第二接口信令处理实体对应的令牌标识；以及向所述接入节点返回应用层连接建立拒绝消息，在所述应用层连接建立拒绝消息中包含所述令牌标识，所述接入节点在重建底层链路时在发起的底层链路创建请求中包含所述令牌标识。The apparatus for creating a link according to claim 14, wherein the second interface allocation module is configured to generate a token identifier corresponding to the second interface signaling processing entity; and to the access node Returning an application layer connection establishment reject message, where the token identifier is included in the application layer connection establishment reject message, and the access node includes the token in the initiated underlying link creation request when rebuilding the underlying link Logo.
  16. 根据权利要求15所述的创建链路的装置，其特征在于，所述第二接口获取模块还用于获取所述底层链路创建请求中包含的令牌标识，根据所述令牌标识查找或计算得到与所述接入节点对应的第二接口信令处理实体。The device for creating a link according to claim 15, wherein the second interface obtaining module is further configured to acquire a token identifier included in the underlying link creation request, and search or according to the token identifier. Calculating a second interface signaling processing entity corresponding to the access node.
  17. 根据权利要求14所述的创建链路的装置，其特征在于，所述第二接口分配模块用于获取所述接入节点的标识，存储所述接入节点的标识与所述分配的第二接口信令处理实体的映射关系；The device for creating a link according to claim 14, wherein the second interface allocation module is configured to acquire an identifier of the access node, and store an identifier of the access node and a second of the allocation. The mapping relationship between the interface signaling processing entity;
    所述第二接口获取模块还用于根据所述映射关系查找与所述接入节点的标识对应的第二接口信令处理实体。The second interface obtaining module is further configured to search, according to the mapping relationship, a second interface signaling processing entity corresponding to the identifier of the access node.
  18. 根据权利要求12至17任一项所述的创建链路的装置，其特征在于，所述装置还包括位置区域更新模块，用于接收上传的位置区域更新请求，根据所述位置区域更新请求获取第二位置区域，重新根据所述第二位置区域为所述接入节点分配第二接口信令处理实体，通知所述接入节点重建底层链路。The device for creating a link according to any one of claims 12 to 17, wherein the device further comprises a location area update module, configured to receive an uploaded location area update request, and obtain the content according to the location area update request. And the second location area, the second interface signaling processing entity is allocated to the access node according to the second location area, and the access node is notified to re-establish the underlying link.
  19. 根据权利要求12至17任一项所述的创建链路的装置，其特征在于，所述第二接口分配模块用于获取所述第一位置区域的标识，根据对所述标识进行取模得到的值为所述接入节点分配第二接口信令处理实体。The device for creating a link according to any one of claims 12 to 17, wherein the second interface allocation module is configured to acquire an identifier of the first location area, and obtain a modulo according to the identifier. The value of the access node is assigned a second interface signaling processing entity.
  20. 根据权利要求12至17任一项所述的创建链路的装置，其特征在于，所述接入节点的标识为所述接入节点的网际互连协议IP地址。The apparatus for creating a link according to any one of claims 12 to 17, wherein the identifier of the access node is an internetworking protocol IP address of the access node.
  21. 根据权利要求12至17任一项所述的创建链路的装置，其特征在于，所述装置还包括寻呼模块，用于获取目标用户终端UE的注册区域，查找位置区域与所述注册区域对应的接口信令处理实体，向所述查找到的接口信令处理实体发起与所述目标UE对应的寻呼请求。 The device for creating a link according to any one of claims 12 to 17, wherein the device further comprises a paging module, configured to acquire a registration area of the target user terminal UE, and search for the location area and the registration area. The corresponding interface signaling processing entity initiates a paging request corresponding to the target UE to the found interface signaling processing entity.
  22. 根据权利要求12至17任一项所述的创建链路的装置，其特征在于，所述装置还包括节点能力通知消息接收模块，用于The device for creating a link according to any one of claims 12 to 17, wherein the device further comprises a node capability notification message receiving module, configured to:
    接收所述接入节点发送的节点能力通知消息，所述节点能力通知消息中包含有所述接入节点是否支持重建链路的标识符；Receiving, by the access node, a node capability notification message, where the node capability notification message includes an identifier of whether the access node supports reestablishing a link;
    所述第二接口分配模块，用于在所述接入节点支持重建链路时，通知所述接入节点重建底层链路。 The second interface allocation module is configured to notify the access node to reestablish an underlying link when the access node supports a reestablished link.
PCT/CN2016/072863 2016-01-29 2016-01-29 Method and device for creating link WO2017128315A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101646253A (en) * 2008-08-07 2010-02-10 华为技术有限公司 Paging method, network element, management network element and communication system
CN102209391A (en) * 2010-03-29 2011-10-05 华为技术有限公司 Random access resource configuration method and device
CN103327611A (en) * 2012-03-22 2013-09-25 华为技术有限公司 Method, device and system for searching MTC terminal
US20130316706A1 (en) * 2012-05-25 2013-11-28 James P. Knauft Predictive paging based on mobility history and movement patterns

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101646253A (en) * 2008-08-07 2010-02-10 华为技术有限公司 Paging method, network element, management network element and communication system
CN102209391A (en) * 2010-03-29 2011-10-05 华为技术有限公司 Random access resource configuration method and device
CN103327611A (en) * 2012-03-22 2013-09-25 华为技术有限公司 Method, device and system for searching MTC terminal
US20130316706A1 (en) * 2012-05-25 2013-11-28 James P. Knauft Predictive paging based on mobility history and movement patterns

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