CN1968501A - Method and system for sensing user end access style in core network - Google Patents

Abstract

The invention discloses a method for realizing the core network perception of the user terminal access type. In the method, the access technology type of the user end is reported to the core network node by the access network node, so that the core network node perceives the access technology type currently used by the user end. Further, the present invention also provides a system for implementing core network perception of user terminal access types, the system includes a user terminal, an access network node unit, and a core network node unit, wherein the access network node unit includes a status update request receiving unit and a A client access technology type reporting unit; the status update request receiving unit is used to receive a client status update request, and the client access technology type reporting unit is used to report the client access technology type to the core network node unit. The invention has higher system compatibility, reliability and practicability, thus adapting to the requirement of the development of access network technology.

Description

Method and system for core network to perceive user terminal access type

technical field

The present invention relates to wireless communication technology, in particular to a method and system for realizing core network perception of user end access technology type.

Background technique

The future network will be a network in which multiple user access technologies (RAT) coexist, such as GSM access network GERAN, WCDMA terrestrial radio access network (UTRAN), wireless local area network (WLAN) access methods and future LTE access network. Under the same access network system, it can also be divided into multiple access methods, such as WCDMA high-speed downlink data access (HSDPA) method. The next-generation wireless core network needs to be compatible with multiple RATs at the same time. Users can use multi-mode terminals to roam and access services on multiple access networks. When a user accesses or initiates a service request, the network needs to know the RAT currently used by the user for subsequent service processing, such as different roaming processing, QoS processing, billing processing, etc. according to different RATs. Therefore, the core network's perception of the RAT adopted by the user is a basic requirement of the next generation network evolution (SAE).

Please refer to FIG. 1 , in the current 3GPP standard, the core network obtains the current RAT of the user by judging the type of the user terminal access interface. The process includes: the mobile station MS reports the "Activation Context Request" message to the Serving GPRS Support Node (SGSN); the SGSN selects the Gateway GPRS Support Node (GGSN) that can provide the FA function according to the APN, and sends a "Create PDP Context Request" message to the GGSN. request' message, and use the RAT type currently used by the user as a new parameter in the sent "Create PDP Context Request" message; if the GGSN accepts the PDP Context Establishment Request, the SGSN sends the "Activate PDP Context Accept" message to the terminal. Said SGSN and GGSN are internal processing units of the core network.

Please also refer to Figure 2. Due to handover and other reasons, the RAT type of the user changes, and the SGSN reports the "update PDP context request" message containing the RAT type currently used by the user, and the core network node obtains the RAT type currently used by the user.

In the above-mentioned existing technologies, the implementation in the process is fixedly configured. Usually, the default access technology of the 2G interface is GSM access, and the message transmitted by the 3G interface defaults to WCDMA access. The type is used to determine the specific access technology used by the user. For example, the service accessed through the Gb interface defaults to the common GSM channel at the user end, and the service accessed through the lu interface defaults to the common UTRAN channel; however, when multiple When two different access technologies share an interface (for example, through the same Gb interface, the user end can use the common GSM channel to access, and can also access through the EDGE channel), the core network cannot be judged by the interface type Which access technologies are used by the client. Furthermore, in the same access network system, multiple access methods can also be provided, such as WCDMA high-speed downlink data access (HSDPA) and wireless local area network (WLAN). different access technology types, resulting in the core network being unable to perceive the user terminal access technology type.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and system for the core network to perceive the access type of the user end, so that the core network can know the access technology type of the user end in a timely and accurate manner.

In order to solve the problems of the technologies described above, the purpose of the present invention is achieved through the following technical solutions:

A method for the core network to perceive the access type of the user end, comprising steps: (1) the user end sends a status update request; (2) the access network node reports the access technology type of the user end to the core network node.

Preferably, the state update request is a client attach request, a location update request and a service access request.

Further, the step (2) is specifically that the access network node carries and reports the UE access technology type to the core network through the Initial UE Message message or the Direct Transfer message.

Preferably, the status update request is a user terminal service request, and the step (2) is specifically that the access network node reports a radio resource allocation response message including the user terminal access technology type.

Preferably, the status update request is an access network node handover, and the step (2) is specifically that the access network node reports a handover completion indication including the access technology type of the client.

Further, the access network node handover is specifically a handover that occurs inside the access network node, and the step (2) specifically is that the access network node reports a handover reporting indication message including the type of the client access technology.

Further, the access network node handover is specifically a handover that occurs between different access network nodes or core network nodes, and the step (2) is specifically that the destination access network node reports to the destination core network node that includes There is a handover preparation response message for the UE access technology type.

The present invention provides a system in which the core network perceives the access type of the user end, including the user end, an access network node unit, and a core network node unit, and the access network node unit includes a state update request receiving unit and a user end access technology Type reporting unit; the status update request receiving unit is used to receive the client status update request, and the client access technology type reporting unit is used to report the client access technology type to the core network node unit.

Preferably, the status update request received by the status update request receiving unit is a client attachment, location update request and service access request, and the client access technology type reporting unit is used to report the client access technology type The message is sent to the core network node unit.

Preferably, the status update request received by the status update request receiving unit is a client service request, and the client access technology type reporting unit reports a radio resource allocation response message including the user access technology type.

Preferably, the status update request received by the status update request receiving unit is an access network node switch, and the client access technology type reporting unit is configured to report a switch completion indication including the client access technology type.

Further, the access network node handover is specifically a handover that occurs inside the access network node, and the client access technology type reporting unit is used to report a handover reporting indication message including the user end access technology type.

Further, the access network node handover is specifically a handover that occurs between different access network nodes or core network nodes, and the client access technology type reporting unit in the target access network node unit reports to the target core network node The unit reports a "handover preparation response message" including the user's access technology type.

It can be seen from the above technical solutions that, firstly, the present invention utilizes the access network node to report the type of access technology used by the current client, even if one access network node can support multiple RAT types at the same time, or there are RATs under the same access network system In the case of different RAT types, etc., the core network can still obtain the RAT type currently used by the client, without affecting subsequent related services. It overcomes the disadvantage of the original mechanism that the RAT type can only be judged by the core network itself, thus adapting to the needs of the development of access network technology.

Secondly, the present invention is based on the improvement of the access function of the existing access network nodes, that is, the access network node reports the user terminal access technology type to the core network node, and realizes the core network node's access technology type of the user terminal. perception. For example, when the client service requests, the access network node uses the radio resource allocation response message to carry and report the client access technology type information to the core network node. Therefore, the present invention has high compatibility, reliability and practicability.

Description of drawings

FIG. 1 is a flow chart of a prior art client accessing a network;

FIG. 2 is a flow chart of handover in the prior art;

Fig. 3 is a flow chart of the method of the present invention;

FIG. 4 is a flow chart of a method for accessing a network at a client end of the present invention;

FIG. 5 is a flowchart of a method for allocating wireless resources in the present invention;

Fig. 6 is a flow chart of the internal handover method of the access network node of the invention;

FIG. 7 is a flow chart of the core network participating in handover according to the present invention;

Fig. 8 is a diagram of functional units of an access network node.

Detailed ways

The core of the present invention is that the access network node reports the user terminal access technology type included in the system message to the core network node, and the core network receives the message and obtains the user terminal access technology type therein.

In order to further understand the present invention, the relevant examples will be described below.

Please refer to Fig. 3, which is a method flowchart of the present invention, based on the above-mentioned core idea, the method of the present invention is:

(1) The client sends a status update request;

(2) The access network node reports the access technology type of the client to the core network node.

Fig. 4 is a flow chart when the UE is attached, location update request or service access request, with reference to this figure, the following further describes the preferred embodiment of the present invention.

The message interaction process between the user terminal and the access network node and the core network node when the user terminal accesses the network, specifically reflects the user terminal attachment, location update request or service access request, the access network node reports the user terminal access technology type The flow chart includes a user terminal 110, an access network node 120, and a core network node 130.

The wireless channel is allocated by the access network nodes according to the QoS requirements in the "channel assignment command" issued by the core network. QoS defines different rates and other related information, and the access network nodes will allocate high-speed channels according to the QoS requirements. and common access channels. According to the existing message delivery mechanism of WCDMA, the network attachment message, location update message and service request message of the user end are all NAS messages. Order message, which includes the network attachment information, location update information and service request information of the user terminal; after the user terminal 110 transmits the NAS message to the RNC (radio network control device), it will be included in the Initial UE of RANAP as a NAS-PDU The Message message or the DirectTransfer message is sent by the access network node 120 to the core network node 130 . The core network node 130 determines the access technology type currently used by the UE according to the RAT type carried in the message. The InitialUE Message or the Direct Transfer message also includes some additional information, such as: the current LAI, RAC, etc. of the UE.

Please continue to refer to FIG. 5 , which is a flow chart of an embodiment of the present invention when the client sends a service request.

This figure describes the support of the radio resource allocation process for reporting the RAT type. Usually, the network allocates radio resources by reporting a service request message from the user end. The service request defines the service type currently supported, and the network allocates channel resources according to the radio resources required by the service type. The access network node 120 receives and forwards the service request message to the core network node 130. When the core network node 130 receives the service request from the user terminal 110, it will send a radio resource allocation request message to the access network node 120, requesting access The network node 120 allocates the required radio resources. After the access network node 120 completes the wireless resource allocation, in the wireless allocation response message, according to the allocated access channel type, the RAT type currently used by the user terminal 110 is reported to the core as a parameter of the wireless resource allocation response message Network node 130 .

In view of the diversity of access modes provided by the existing access network, when a user end needs to perform handover, it may be the handover that occurs inside the access network node 120, that is, in the case of the same interface, it needs to be switched on a different interface. switching between incoming channels; it may also be switching between different interface situations. The following two cases will be introduced in turn.

Please refer to FIG. 6 , which is a flowchart of an embodiment of the present invention when a handover occurs within an access network node.

It mainly reflects that the access network node 120 supports the reporting of the RAT type during internal handover.

When the access network node is performing an intra-node handover process, after the handover is completed, it needs to send a handover report instruction to the core network node for reporting the handover event. The handover report instruction includes the wireless channel resources used after the handover Type, that is, the "RAT type".

The existing radio access network (RAN) can support multiple access technology types, that is, when the UE state needs to be switched from one access technology type to another access technology type, the access network node The RAT type message after the UE handover is completed should be reported to the core network node.

In order to further understand the process of reporting the UE access technology type when the handover occurs, the following will describe in detail the specific embodiment when the handover occurs between different access network nodes or core network nodes.

Please refer to FIG. 7 , a user terminal 110 , a source access network node 121 , a destination access network node 122 , a destination core network node 132 , and a source core network node 131 . Wherein, the source access network node 121 implements the access of the UE before the handover, and the destination access network node 122 implements the access of the UE after the handover is completed.

The source access network node 121 belongs to the source core network node 131 , and the destination access network node 122 belongs to the destination core network node 132 .

First, step S1 is implemented, the source access network node 121 initiates a handover request to the source core network node 131 according to the handover decision result, and the handover request includes handover destination information.

Next, in step S2, the source core network node 131 sends a handover preparation message to the handover destination core network node 132 after receiving the handover request.

In step S3, the target core network node 132 allocates corresponding radio channel resources on the target side according to the requirement for radio channel resources in the handover preparation message.

Step S4, after the wireless channel resources are allocated successfully, the target core network node 132 sends a handover preparation response to the source core network node 131, indicating that the handover preparation of the target side is successful.

The handover preparation response message includes the UE access technology type corresponding to the wireless channel resources allocated according to step S3.

In step S5, the source core network node 131 performs network definition processing according to the UE access technology type in the handover preparation response.

The network definition process refers to the core network node judging whether to allow switching, special billing policies, and the like.

In step S6, the source core network node 131 sends a switching command to the UE 110, and the UE 110 switches to the destination network according to the switching command.

Step S7, after the target access network node 132 detects that the client terminal 110 is successfully handed over, it sends a handover completion message to the target core network node 132, and after receiving the handover completion response, the target core network node 132 forwards the message to the source core network node 131.

In step S8, after receiving the handover completion, the source core network node 131 releases the radio resources on the source side, and returns a handover completion response message on the destination side, indicating that the handover is successful.

Please refer to FIG. 8 , which is a block diagram of an embodiment of the core network-aware client access type system of the present invention. It includes a user terminal 110 , an access network node unit 120 , and a core network node unit 130 , and the access network node unit includes a status update request receiving unit 1201 and a user terminal access technology type reporting unit 1202 . The status update request receiving unit 1201 is configured to receive a client status update request; the client access technology type reporting unit 1202 is configured to report the client access technology type to the core network node unit 130 .

Specifically, when the user terminal 110 sends an attach, location update request or service access request to the access network node unit 120, the state update request receiving unit 1201 in the access network node unit 120 receives the access request, and the user terminal The access technology type reporting unit 1202 reports the UE access technology type included in the RANAP Initial UE Message or Direct Transfer message to the core network node 130.

Similarly, when the client 110 sends a client service request to the access network node unit 120, the status update request receiving unit 1201 in the access network node unit 120 receives the service request, and the client access technology type reporting unit 1202 Report a radio resource allocation response message including the user access technology type.

Similarly, when the client 110 sends a handover request that occurs inside the access network node to the access network node unit 120, the state update request receiving unit 1201 in the access network node unit 120 receives the handover request, and after the handover is completed, the user The terminal access technology type reporting unit 1202 reports a switching report indication message including the user access technology type.

Further, when the user terminal 110 sends a request to the access network node unit 121 for switching between different access network nodes or core network nodes, the source access network node unit 121 sends a request to the source core network node unit according to the handover judgment result. 131 initiates a handover request, and the handover request includes handover purpose information; after the source core network node 131 receives the handover request, it sends a handover preparation message to the handover destination core network node 132; the destination core network node 132 proposes a The requirements for wireless channel resources, the reception status update request receiving unit 1221 in the target access network node 122 allocates corresponding wireless channel resources on the target side; after the wireless channel resource allocation is successful, the user terminal in the target access network node 122 The incoming technology reporting unit 1222 reports the user end access technology type to the destination core network node 132; the destination core network node 132 sends a handover preparation response to the source core network node 131, indicating that the handover preparation of the destination side is successful, and the current access technology type of the user end is Included in the handover preparation response; the source core network node 131 performs the processing defined by the user end according to the user end access technology type in the handover preparation response; the source core network node 131 sends a handover command to the user end 110, and the user end 110 according to Handover command is switched to the target network; after the target access network node 132 detects that the user terminal 110 is successfully switched, it sends a handover completion message to the target core network node 132, and after the target core network node 132 receives the handover completion response, the message is forwarded to The source core network node 131; after receiving the completion of the handover, the source core network node 131 releases the radio resources on the source side, and returns a handover completion response message on the destination side, indicating that the handover is successful.

To sum up, the present invention improves the function of the access network node, so that the access network node reports the current access technology type of the user terminal, and then, the core network node can directly obtain the user's current access technology type, and carry out subsequent processing .

The method and system for a core network sensing user terminal access type provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used To help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, this specification The content should not be construed as a limitation of the invention.

Claims (13)

1. the method for a sensing user end access style in core network is characterized in that, comprises step:

1) user side transmit status update request;

2) access network node report of user termination is gone into the type of skill to core net node.

2. according to the method for the described sensing user end access style in core network of claim 1, it is characterized in that described state update request is that user side adheres to, position updating request and service access request.

3. according to the method for the described sensing user end access style in core network of claim 2, it is characterized in that described step 2) be specially access network node and by Initial UE Message message or DirectTransfer message user side access technology type carried and report to core net.

4. according to the method for the described sensing user end access style in core network of claim 1, it is characterized in that, described state update request is the user side service request, described step 2) be specially access network node and report the allocation of radio resources response message that includes user side access technology type.

5. according to the method for the described sensing user end access style in core network of claim 1, it is characterized in that, described state update request is the access network node handoff request, described step 2) be specially access network node and report the switching that includes user side access technology type to finish indication.

6. according to the method for the described sensing user end access style in core network of claim 5, it is characterized in that, described access network node switch be specially the inner switching that takes place of access network node, described step 2) be specially access network node and report the switching that includes user side access technology type to report Indication message.

7. according to the method for the described sensing user end access style in core network of claim 5, it is characterized in that, described access network node switch be specially the switching that between different access network nodes or core net node, takes place, described step 2) be specially by the purpose access network node and report the switching that includes user side access technology type to prepare response message to the purpose core net node.

8. the system of a sensing user end access style in core network, comprise user side, access network node unit, core net node unit, it is characterized in that described access network node unit comprises that state update request receiving element and user side access technology type report the unit; Described state update request receiving element is used to receive user side state update request, and described user side access technology type reports the unit to be used for the report of user termination to go into the type of skill to the core net node unit.

9. the system of described sensing user end access style in core network according to Claim 8, it is characterized in that, the state update request that described state update request receiving element receives is that user side adheres to, position updating request and service access request, and described user side access technology type reports the unit to be used to report to include user side access technology kind of message to the core net node unit.

10. the system of described sensing user end access style in core network according to Claim 8, it is characterized in that, the state update request that described state update request receiving element receives is the user side service request, and described user side access technology type reports the unit to report to include the allocation of radio resources response message of user's access technology type.

11. the system of described sensing user end access style in core network according to Claim 8, it is characterized in that, the state update request that described state update request receiving element receives is that access network node switches, and described user side access technology type reports the unit to be used to report to include the switching of user side access technology type to finish indication.

12. system according to claim 11 sensing user end access style in core network, it is characterized in that, described access network node switches and is specially the inner switching that takes place of access network node, and user side access technology type reports the unit to be used to report to include the switching of user side access technology type to report Indication message.

13. system according to claim 11 sensing user end access style in core network, it is characterized in that, described access network node switching is specially the switching that takes place between different access network nodes or core net node, the user side access technology type in the purpose access network node unit reports the unit to report the switching that includes user side access technology type to prepare response message to purpose core net node unit.

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