WO2009105956A1

WO2009105956A1 - A control method and system for establishing multiple tunnels in wireless communication network

Info

Publication number: WO2009105956A1
Application number: PCT/CN2008/073440
Authority: WO
Inventors: 周娜; 毕以峰; 杨浩
Original assignee: 中兴通讯股份有限公司
Priority date: 2008-02-29
Filing date: 2008-12-10
Publication date: 2009-09-03
Also published as: CN101237699A; CN101237699B

Abstract

A control method for establishing multiple tunnels between a wireless network node and an access server is provided, in which the ability identifier about whether the access server supports independent reverse tunnel is saved in the wireless control point; after receiving the session update notice transmitted from the terminal, the wireless network node initiates session information request to the wireless control point; the wireless control point carries the said identifier in the session information response which is returned to the wireless network node; after becoming the data attaching point, when initiating the tunnel establishing request to the access server, the wireless network node in the terminal route set judges whether the access server supports independent reverse tunnel according to the received identifier, and if so, the tunnel type identifier that supports both reverse tunnel and the main tunnel at the same time is carried in the tunnel establishing request; otherwise, the tunnel type identifier that supports the main tunnel is carried in the tunnel establishing request. Comparing to the prior art, the method improves the efficiency of adding route effectively and reduces the overhead and load of the wireless communication system.

Description

Method and system for establishing multi-tunnel in wireless communication network

The present invention relates to the field of communications, and in particular, to a control method and system for establishing a multi-tunnel between a wireless network node and an access server in a wireless communication network.

Background technique

In order to ensure the convenience of handover between wireless network nodes, a separate reverse tunnel needs to be established between the wireless network node supporting the independent reverse tunnel and the access server, and multiple wireless network nodes in the route set of the same terminal will be connected. There are multiple separate reverse tunnels between servers, which facilitates the reverse data can be sent directly from the wireless network node to the access server and the implementation of the handover.

The establishment of the reverse tunnel requires the access server to have an independent reverse tunnel. The tunnel establishment operation is performed when the user accesses and the route is added. The wireless network node, the wireless control point, and the access server work together to complete the tunnel. The establishment of multiple tunnels in the terminal.

Figure 1 is a diagram of an architecture reference model for implementing packet data user access in an existing network. In order to provide a packet data service, the wireless network node interacts with the access server to exchange media messages, maintain and control data links. As a signaling function entity of the radio access network, the radio control point is responsible for functions such as session storage, paging and location management, idle state management, and access authentication, and the authentication authority performs access authentication and user access to the terminal. Authorized features. Any of the wireless network nodes supporting the independent reverse tunnel will establish a separate reverse tunnel with the access server with independent reverse tunnel capability. Therefore, if the wireless network node 1 and the wireless network node 2 exist in the routing set of the terminal, they will establish independent reverse tunnels with the access server respectively.

FIG. 2 shows a simplified flow of multi-tunnel establishment when a user initially accesses in an existing wireless communication network, and the specific steps are as follows: Step 201: When the user terminal accesses, through the wireless control point, the access server, and the authentication authorization Server communication, performing access authentication and authorization operations;

Step 202: After the access authentication succeeds, the authentication authorization server returns an authentication response to the access server, where the authorization information of the user is included. Step 203: The access server sends an authentication response to the wireless control point, where the message carries information such as an authentication authorization session ID and a quality of service parameter.

Step 204: After receiving the authentication response message, the wireless control point sends an authentication success response to the terminal.

Step 205: The wireless control point and the terminal perform session information configuration.

Step 206: After the session information is configured, the terminal sends a session update request to all the wireless network nodes (such as the wireless network node 1 and the like) in the route set, and notifies the wireless network node to perform session update.

Step 207: After receiving the session update notification, the wireless network node requests the session information from the wireless control point.

Step 208: The wireless control point sends the session information to the wireless network node, where the information such as the access server address and the username is carried.

Step 209: The wireless network node transmits the access server identifier (which may be composed of the IP address of the access server) to the terminal, so that the terminal can determine whether the operation of applying for the IP address needs to be performed.

Step 210 (Optional), the terminal initiates a data attachment point move request to the wireless network node 1, requesting the wireless network node 1 to become a data attachment point;

Since the wireless network node 1 becomes a data attachment point, it can also be judged by the network, that is, the wireless network node 1 can know that it will act as a data attachment point without requiring the terminal to initiate a request trigger, and therefore, this step is optional;

Step 211: The wireless network node 1 requests the access server to establish a tunnel, and carries the tunnel type identifier: simultaneously supports the reverse tunnel and the primary tunnel;

Step 212: If the access server supports the independent reverse tunnel, return a response of the reverse tunnel and the primary tunnel to the wireless network node 1; if the access server does not support the independent reverse tunnel, respond to the wireless network node. The response of 1 carries the information that the reverse tunnel establishment fails, and only the primary tunnel is established between the access server and the wireless network node 1;

Step 213: The wireless network node 1 notifies the terminal that the data attachment point allocation is completed.

Step 214: The wireless network node 1 notifies the activation set member data attachment point information of the terminal; Step 215: The terminal requests an IP address to be allocated, and obtains an IP address through the access server.

It is assumed that the wireless network node 1 has established a primary tunnel connection with the access server. When the terminal determines that the wireless network node 2 needs to be added to its routing set, the method for establishing a reverse tunnel between the wireless network node 2 and the access server is determined. And the specific steps are as follows:

Step 301: The terminal sends a route addition request to the wireless network node 2, requesting to add the wireless network node 2 to the route set.

Step 302: The wireless network node 2 sends a session information request to the wireless control point, requesting to acquire session information, such as an access server address, a username, and the like;

Step 303, after receiving the session request message, the wireless control point sends the session information to the wireless network node 2;

Step 304: The wireless network node 2 initiates a reverse tunnel establishment request to the access server, where the request carries a tunnel type identifier: supports a reverse tunnel;

Step 305: If the access server supports the independent reverse tunnel, respond to the tunnel establishment success message to the wireless network node 2; otherwise, respond to the wireless network node 2 with the tunnel establishment failure information; Step 306, the wireless network node 2 sends a route to the terminal. Add a response to inform the terminal that the route is successfully added.

It can be seen from the above process that when the terminal performs initial access and route addition, regardless of whether the access server has the capability of independent reverse tunneling, the wireless network node will request the tunnel establishment operation from the access server, if the access server does not support Independent reverse tunnel, the reverse tunnel establishment request will be rejected, see steps 212 and 305, and thus, even if the access server does not support the independent reverse tunnel, the wireless network node will initiate a reverse tunnel establishment request, thereby This causes a waste of system resources and an increase in network burden.

Summary of the invention

The technical problem to be solved by the present invention is to provide a control method and system for establishing multiple tunnels in a wireless communication network, which can effectively improve route addition efficiency and reduce overhead and negative of a wireless communication system. Bear.

In order to solve the above problems, the present invention provides a method for establishing a multi-tunnel in a wireless communication network. Before the wireless network node sends a tunnel establishment request to the access server, the access server passes its tunnel support capability information through wireless control. Sending to the wireless network node, the wireless network node determining, according to the tunnel support capability information, whether to initiate a tunnel establishment request to the access server, and if it is determined that the tunnel establishment request needs to be initiated, carrying the tunnel setup request The access server supports the tunnel type identifier with consistent capabilities.

Further, the method includes the following steps:

(al) the access server sends its tunnel support capability information to the wireless control point, and the wireless control point receives the tunnel support capability information after receiving it;

(bl) the wireless network node in the terminal routing set sends a session information request to the wireless control point after receiving the session update notification sent by the terminal; after receiving the session information request, the wireless control point responds to the session information response to the wireless network node. Carrying the tunnel support capability information;

(c) the wireless network node that becomes the data attachment point initiates a tunnel establishment request to the access server according to the received tunnel support capability information, where the request carries a tunnel type identifier that is consistent with the support capability of the access server. .

Further, in step (cl),

If the tunnel support capability information indicates that the access server supports the independent reverse tunnel and the primary tunnel, the tunnel establishment request carries a tunnel type identifier that supports both the reverse tunnel and the primary tunnel; The access server only supports the primary tunnel, and the tunnel establishment identifier carries the tunnel type identifier of the primary tunnel.

Further, in step (cl), the wireless network node is determined to be a data attachment point according to a terminal request or a network.

Further, the method includes the following steps:

2) The access server sends its tunnel support capability information to the wireless control point, and the wireless control point receives the tunnel support capability information after receiving it;

(b2) after receiving the route addition request initiated by the terminal, the wireless network node initiates a session information request to the wireless control point, and after receiving the session information request, the wireless control point responds to the wireless network node. Carrying the tunnel support capability information in the session information;

(c2) the wireless network node determines, according to the received tunnel support capability information, whether the access server supports the reverse tunnel, and if not, does not need to initiate a tunnel establishment request, otherwise initiates a tunnel establishment request to the access server. The request carries a tunnel type identifier that is consistent with the support capability of the access server.

Further, the access server sends its tunnel support capability information to the wireless control point in this way:

The terminal performs access authentication and authorization for the initial access through the wireless control point, the access server, and the authentication authorization server. After the access authentication succeeds, the authentication and authorization server returns the authentication response to the access server, and then receives the authentication response. The ingress server sends the authentication response to the wireless control point, and carries the tunnel support capability information in the authentication response message. The other wireless network nodes in the terminal routing set have established a primary tunnel connection with the access server.

In order to solve the above technical problem, the present invention also provides a multi-tunnel control system, where the system includes an access server, a wireless control point, and a wireless network node, where

The access server is configured to send the tunnel support capability information to the wireless control point, where the wireless control point is configured to send the tunnel support capability information to the wireless network node before initiating a tunnel establishment request Wireless network node;

The wireless network node is configured to determine, according to the received tunnel support capability information, whether to initiate a tunnel establishment request to the access server, and if it is determined that the tunnel establishment request is to be initiated, the tunnel establishment request carries the support capability of the access server. Consistent tunnel type identifier.

Further, the system further includes an authentication authorization server, where the authentication authorization server is configured to perform an authentication authorization operation, and send an authentication response to the access server; the access server is further configured to forward the to the wireless control point. The authentication response, the tunnel support capability information is sent to the wireless control point in the authentication response; the wireless network node is further configured to send a session information request to the wireless control point, where the wireless control point is further And configured to send a session information response to the wireless network node, where the tunnel support capability information is carried in the session information response and sent to the wireless network node. Further, the system further includes a mobile terminal, where the mobile terminal is configured to send a session update request or a route addition request to the wireless network node; and if the wireless network node receives a session update request, to the access server Initiating a tunnel establishment request; if the wireless network node receives a route addition request and the access server supports an independent reverse tunnel, the wireless network node sends a tunnel establishment request to the access server; If a route addition request is received but the access server does not support the independent reverse tunnel, there is no need to initiate a tunnel establishment request.

Compared with the prior art, the method and system of the present invention saves the capability identifier of the access server to support the independent reverse tunnel in the wireless control point, and when the wireless network node is added to the terminal route set, it can obtain from the wireless control point. Accessing the capability identifier of the server, thereby solving the problem in the prior art that when the terminal adds routing, regardless of whether the access server has an independent reverse tunnel, the wireless network node requests the access server to establish a tunnel; and The routing addition efficiency is effectively improved, and the overhead and burden of the wireless communication system are reduced.

BRIEF abstract

1 is a schematic diagram of a wireless communication network architecture;

2 is a flow chart of initial user access in an existing wireless communication network;

3 is a flow chart of adding a wireless network node to a terminal routing set in an existing wireless communication network;

4 is a flow chart of a preferred mode of the present invention for initial user access in a wireless communication network; and FIG. 5 is a flow chart of a preferred embodiment of the present invention for implementing a wireless network node to add a wireless network node to a terminal routing set.

Preferred embodiment of the invention

The core of the control method and system for establishing a multi-tunnel in the wireless communication network of the present invention is: before the wireless network node sends a tunnel establishment request to the access server, the access server sends its tunnel support capability information to the wireless control point to The wireless network node determines, according to the tunnel support capability information, whether to initiate a tunnel establishment request to the access server, and if it is determined that the tunnel establishment request needs to be initiated, the tunnel establishment request carries the access server stand by A tunnel type identifier with consistent capabilities.

In order to better describe the implementation features and methods of the present invention, the implementation of the technical solution will be further described in detail below with reference to the accompanying drawings, wherein both the wireless network node 1 and the wireless network node 2 support the establishment of multiple tunnels.

FIG. 4 is a flowchart of a preferred mode of the present invention for implementing initial access of a user in a wireless communication network, and the control method and specific steps thereof are as follows:

Step 401: When the mobile terminal accesses, the access server and the authentication authorization server communicate through the wireless control point, and perform access authentication and authorization operations;

Step 402: After the access authentication succeeds, the authentication and authorization server returns an authentication response to the access server, where the authorization information of the user is included.

Step 403: The access server sends an authentication response to the wireless control point, where the message carries the support capability identifier of the access server to the independent reverse tunnel, and carries the information such as the authentication authorization session ID and the quality of service parameter.

Step 404: After receiving the authentication response message, the wireless control point saves the access capability identifier of the access server to the independent reverse tunnel, so as to transmit the information to the wireless network node 1, and then the wireless control point sends the authentication success to the terminal. Respond

Step 405: The wireless control point and the terminal perform session information configuration.

Step 406: After the session information is configured, the terminal notifies all the wireless network nodes in the routing set (the wireless network node 1 in the figure) to perform session update.

Step 407: After receiving the session update notification, the wireless network node 1 requests session information from the wireless control point.

Step 408: The wireless control point sends the session information to the wireless network node 1, which carries the support capability identifier of the access server to the independent reverse tunnel, and carries information such as the access server address and the user name;

Step 409: The wireless network node 1 transmits the access server identifier to the terminal, so that the terminal can determine whether it is necessary to perform an operation for requesting an IP address. Step 410 (Optional), the terminal initiates a data attachment point move request to the wireless network node 1, requesting the wireless network node 1 to become a data attachment point;

Step 411: The wireless network node 1 checks the support capability identifier of the access server for the independent reverse tunnel, and initiates a tunnel establishment request to the access server, where the request carries a tunnel type identifier that is consistent with the support capability of the access server. .

If the access server supports the independent reverse tunnel, the wireless network node 1 requests the access server to establish a tunnel, carrying the tunnel type identifier: simultaneously supporting the reverse tunnel and the primary tunnel, and if the access server does not support the independent reverse tunnel, the wireless The network node 1 requests the access server to establish a tunnel, carrying the tunnel type identifier: supporting the primary tunnel;

Step 412: The access server returns a tunnel establishment response to the wireless network node 1;

Step 413: The wireless network node 1 notifies the terminal that the data attachment point allocation is completed.

Step 414: The wireless network node 1 notifies the activation set member data attachment point information of the terminal. Step 415: The terminal requests allocation of the IP address, and obtains an IP address by using the access server. As can be seen from the above process, when the terminal initially accesses, after receiving the tunnel request from the wireless network node, if the access server does not support the independent reverse tunnel, the wireless network node will only initiate the establishment request of the primary tunnel. The request for establishing the reverse tunnel is no longer initiated. Referring to step 411, the access server is prevented from responding to the reverse tunnel establishment failure information in the response message. Referring to step 211 in FIG. 2, the processing response of the access server can be simplified. .

Figure 5 is a flow diagram of a preferred embodiment of the present invention for enabling the addition of a wireless network node to a terminal routing set in a wireless communication network. It is assumed that the wireless network node 1 is already in the routing set of the terminal, and establishes a primary tunnel connection with the access server. When the terminal determines that the wireless network node 2 needs to be added to its routing set, the wireless network node 2 and the access server are established at this time. The control method and specific steps of the reverse tunnel are as follows:

Step 501: The terminal requests to add the wireless network node 2 to the route set.

Step 502: The wireless network node 2 requests the wireless control point to acquire session information, such as an access server address, a username, and the like;

Step 503: After receiving the session request message, the wireless control point sends the session information to the wireless Network node 2, which includes an access capability identifier of the access server to the independent reverse tunnel; Step 504, the wireless network node 2 checks the support server for the independent reverse tunnel support capability identifier, and if the access server supports the independent reverse tunnel, The wireless network node 2 requests the access server to establish a tunnel, and carries the tunnel type identifier: the reverse tunnel is supported; if the access server does not support the independent reverse tunnel, the tunnel establishment operation is not required, and the process proceeds to step 506;

Step 505: The access server responds to the tunnel establishment message to the wireless network node 2;

Step 506: The wireless network node 2 sends a route addition response to the terminal.

It can be seen from the above process that when the route is added, if the access server does not support the independent reverse tunnel, the wireless network node will not perform the reverse tunnel establishment request again, see step 504, thereby avoiding step 305 of FIG. The medium access server responds to the reverse tunnel establishment failure information in the response message, thereby improving the route addition efficiency and effectively reducing the overhead and burden of the wireless communication system.

In the process shown in FIG. 5, before the terminal initiates the route addition request to the wireless network node 2, the wireless network node 1 in the terminal route set has established a primary tunnel connection with the access server.

If the primary tunnel connection has not been established before the terminal initiates the route addition request to the wireless network node 2, in step 504, the wireless network node still only determines whether the access server supports the independent reverse tunnel, and initiates a process of establishing a reverse tunnel. Then, the process of establishing the main tunnel is initiated.

In the above embodiment, the access server is in the authentication and authorization response of the initial access of the terminal, and the support capability identifier of the independent reverse tunnel is sent to the wireless control point by using the existing response message, as long as the wireless network node is guaranteed. The identifier is obtained before the tunnel establishment request is sent to the access server, and the wireless control point may of course obtain the support capability identifier by using a separate new message at other time points.

The support capability identifier of the independent reverse tunnel saved by the wireless control point mentioned above may also be replaced by other tunnel support capability identifiers or information indicating the access server. In this way, the wireless network node may initiate a tunnel establishment request to the access server according to the received identifier or information, and the request carries a tunnel type identifier that is consistent with the support capability of the access server. Specifically, if the tunnel support capability identifier or information indicates that the access server supports the independent reverse tunnel and the primary tunnel, The tunnel establishment request carries a tunnel type identifier that supports both the reverse tunnel and the primary tunnel. If the tunnel support capability identifier or information indicates that the access server supports only the primary tunnel, the tunnel establishment request carries the tunnel supporting the primary tunnel. Type identifier.

If the access server supports the independent reverse tunnel and the primary tunnel, it also supports other types of tunnels. However, if the tunnel tunnel request is sent only to establish an independent reverse tunnel, the tunnel request can only carry the support independent reverse. The identifier of the tunnel, that is, the carried tunnel type identifier does not exceed the support capability of the access server. In this case, the request of the present invention carries the tunnel type identifier consistent with the support capability of the access server.

It can be understood that, if the tunnel support capability identifier is used to indicate the independent reverse tunnel support capability, the access server is considered to support the primary tunnel by default.

In order to implement the above control method for establishing a multi-tunnel, the present invention also provides a multi-tunnel control system, which includes an access server, a wireless control point, and a wireless network node, wherein the access server is configured to The tunnel support capability information is sent to the wireless control point;

a wireless control point, configured to send the tunnel support capability information to the wireless network node before the wireless network node initiates the tunnel establishment request;

The wireless network node is configured to determine, according to the received tunnel support capability information, whether to initiate a tunnel establishment request to the access server, and if it is determined that the tunnel establishment request is to be initiated, the tunnel establishment request carries the same as the access server support capability. Tunnel type identifier.

The wireless network node is further configured to send a session information request to the wireless control point, where the wireless control point is further configured to send a session information response to the wireless network node, where the tunnel support capability information is carried in the session information response. To the wireless network node;

According to the above control method, the control system of the present invention further includes an authentication authorization server and a mobile terminal, wherein the authentication authorization server is configured to perform an authentication authorization operation, and send an authentication response to the access server; the access server is further configured to The wireless control point forwards the authentication response, where the tunnel support capability information is carried in the authentication response and sent to the wireless control point;

The mobile terminal is configured to send a session update request or a route add request to the wireless network node.

Specifically, if the wireless network node receives a route addition request and the access server supports an independent reverse tunnel, the wireless network node sends a tunnel establishment request to the access server; If the wireless network node receives a route addition request but the access server does not support the independent reverse tunnel, there is no need to initiate a tunnel establishment request.

The present invention implements a control method and system for establishing multiple tunnels between a wireless network node and an access server in a wireless communication network with minimal changes and impacts on existing systems.

The location update process in the above embodiment may be applied to other systems using the same method as mentioned in the background art in addition to the wireless communication system. When applied to other systems, the messages used may be different, but in the process. The logical relationship is the same.

Industrial applicability

Claims

Claim

A method for establishing a multi-tunnel in a wireless communication network, characterized in that: before the wireless network node sends a tunnel establishment request to the access server, the access server sends its tunnel support capability information to the wireless control point to The wireless network node determines, according to the tunnel support capability information, whether to initiate a tunnel establishment request to the access server, and if it is determined that the tunnel establishment request needs to be initiated, the tunnel establishment request carries the access server Supports tunnel type identifiers with consistent capabilities.

2. The method of claim 1 comprising the steps of:

3. The method according to claim 2, wherein in step (cl),

The method according to claim 2, wherein in step (cl), the wireless network node is determined to be a data attachment point according to a terminal request or a network.

5. The method according to claim 1, wherein the method comprises the following steps: 2) the access server sends its tunnel support capability information to the wireless control point, and the wireless control point receives the tunnel support capability information after receiving the information. ;

The method according to claim 3 or 5, wherein the access server sends its tunnel support capability information to the wireless control point:

The terminal performs access authentication and authorization for the initial access through the wireless control point, the access server, and the authentication authorization server. After the access authentication succeeds, the authentication and authorization server returns the authentication response to the access server, and then receives the authentication response. The ingress server sends the authentication response to the wireless control point, and carries the tunnel support capability information in the authentication response message.

7. The method of claim 7, wherein the other wireless network nodes in the route set have established a primary tunnel connection with the access server.

8. A multi-tunnel control system, the system comprising an access server, a wireless control point, and a wireless network node, wherein:

9. The control system according to claim 8, wherein the system further comprises an authentication authorization server, wherein the authentication authorization server is configured to perform an authentication authorization operation, and send an authentication response to the access server; The access server is further configured to forward the authentication response to the wireless control point, where the tunnel support capability information is carried in the authentication response and sent to the wireless control point; the wireless network node is further used to send the wireless The control point sends a session information request, and the wireless control point is further configured to send a session information response to the wireless network node, where the tunnel support capability information is carried in the session The information response is sent to the wireless network node.

10. The control system according to claim 8, wherein: the system further comprises a mobile terminal request; if the wireless network node receives the session update request, initiating a tunnel establishment request to the access server; If the network node receives the route addition request and the access server supports the independent reverse tunnel, the wireless network node sends a tunnel establishment request to the access server; if the wireless network node receives the route addition request but If the access server does not support independent reverse tunneling, there is no need to initiate a tunnel establishment request.