WO2008141504A1

WO2008141504A1 - Location update method for idle-mode terminal after inter-wireless controll point handover

Info

Publication number: WO2008141504A1
Application number: PCT/CN2007/003901
Authority: WO
Inventors: Na Zhou; Xiaoying Feng; Xiaowu Zhao; Xiuli Xu; Rajesh Bhalla; Hao Yang
Original assignee: Zte Corporation
Priority date: 2007-05-24
Filing date: 2007-12-29
Publication date: 2008-11-27
Also published as: CN101312571A; CN101312571B

Abstract

A location update method for idle-mode terminal after inter-wireless control point handover in a wireless communication network is disclosed. After idle-mode terminal has moved into the manage range of new wireless control point, it triggers that idle-mode terminal requests registration. The requesting message requests registration of location information via destination wireless network node to the destination wireless control point. The destination wireless control point stores current user location information and judges by session id in the requesting registration message whether the terminal has happened inter-wireless control point handover. If terminal has happened inter-wireless control point handover, it informs the source wireless control point that user has moved and requests the user corresponding information. Further, the source wireless network node informs the access server caching the data sent to the terminal after the address of destination wireless network node is sent to source wireless network node via source wireless control point.

Description

Method for performing location update after idle terminal moves across wireless control points

Technical field

The present invention relates to a method for implementing location update of an idle terminal after moving across a wireless control point in a wireless communication network.

Background technique

In order to ensure that the network side can successfully page the terminal in the idle state, the terminal needs to periodically inform the corresponding network node of its location information, and the network node will update and save the terminal location, so that when the network side is in the terminal When the paging is initiated, the current location of the terminal can be obtained, and finally the establishment of the session between the terminal and the wireless network and the transmission of related data are realized.

The location update operation is performed by the wireless network node, the wireless control point, and the access server, and performs the function of registering and updating the location of the idle terminal (that is, the terminal in the idle state).

When the mobile terminal moves across the wireless control point in the network, the new wireless control point will record the current location of the mobile terminal. Therefore, the access server needs to acquire the location of the new wireless control point, so as to know the location information of the mobile terminal, thereby realizing The network side smoothly pages the mobile terminal. As shown in FIG. 1, an architecture reference model diagram for implementing packet data user access for an existing network. In order to provide a packet data service, the wireless network node 11 is responsible for interacting with the access server 13 for media message, data link maintenance and control. As a signaling functional entity of the radio access network, the signaling radio control point 12 is responsible for functions such as session storage, paging and location management, idle state management, and access authentication.

As shown in Figure 2, a simplified flow chart of location updates in an existing wireless communication network is shown, with the following specific steps:

Step 201: Perform data flow interaction between the terminal, the source wireless network node, and the access server. Step 202: The terminal enters an idle state.

Step 203: After the terminal moves to the new routing area, the terminal initiates a location update operation. Step 204: The terminal initiates a registration request to the wireless network node (ie, the target wireless network node) where the terminal is located; Step 205, the target The wireless network node forwards the registration request message to the target wireless control point; The target wireless control point saves current user location information;

Step 206: The target wireless control point requests user related information from the source wireless control point. Step 207: The source wireless control point returns the requested user information to the target wireless control point.

Step 208: The target wireless control point performs bearer information interaction with the access server. Step 209: The target wireless control point returns a registration result to the target wireless network node. Step 210: The target wireless network node forwards the registration result to terminal.

In the existing wireless communication network, the downlink data of the paging is cached in the access server. It can be seen from the above process that the location of the new wireless control point is transmitted by the new wireless control point to the access server by sending a bearer setup notification message. Step 208, does not pass through the wireless network node. The flexible selection of data cache points in the prior art has become a problem to be solved. For example, in the case of non-handover, the downlink data is buffered in the wireless network node (this can ensure that the user gets fast paging performance), and when switching across the wireless network node, the downlink data can be cached to the access server, and now The process shown in Figure 2 cannot implement this type of scenario.

According to the two cases of flexible buffering of data in the prior art, see Fig. 3 and Fig. 4, the flows are respectively described as follows.

As shown in FIG. 3, in the prior art, for data buffering in a wireless network node, the location update and paging steps are roughly as follows:

Step 301: When the location is updated, the data flow interaction between the terminal, the wireless network node, and the access server is performed;

Step 302: The terminal enters an idle state.

Step 303: The terminal moves to trigger a location update operation.

Step 304: The terminal initiates a registration request to the wireless network node where the terminal is located, and carries the session identifier and the user identifier.

Step 305: The wireless network node forwards a registration request message to the wireless control point, and carries the session identifier and the user identifier, where the wireless control point saves the current user location information.

Step 306: The wireless control point determines, according to the session identifier, whether the terminal occurs across a wireless network. The switching of the node, if the wireless network node displayed by the session identifier is the same as the currently connected wireless network node, it is considered that the terminal does not move, and the registration result is returned to the wireless network node;

Step 307: The wireless network node forwards the registration result to the terminal.

Step 308, when paging, the downlink data of the user reaches the access server;

Step 309, the access server forwards data to a wireless network node.

Step 310: The wireless network node sends a paging request to a wireless control point.

Step 311: The wireless control point sends a paging broadcast to all wireless network nodes in a location range where the terminal is located.

Step 312: After the wireless network node pages the user, establish a session between the wireless network node and the terminal.

Step 313: Perform data flow interaction between the wireless network node and the terminal.

As shown in FIG. 4, in the prior art, for the data cached in the access server, the location update and paging steps are roughly as follows:

Step 401: When the location is updated, the terminal, the source wireless network node, and the access server perform data stream interaction;

Step 402: The terminal enters an idle state.

Step 403: The terminal moves to trigger a location update operation.

Step 404: The terminal initiates a registration request to the wireless network node where the terminal is located, and carries the session identifier and the user identifier.

Step 405: The wireless network node forwards a registration request message to the wireless control point, and carries the session identifier and the user identifier. The wireless control point saves the current user location information.

Step 406: The wireless control point determines, according to the session identifier, whether the terminal has a handover across the wireless network node. If the wireless network node displayed by the session identifier is different from the currently connected wireless network node, the terminal is considered to have moved to the new wireless network node. And notifying the source wireless network node that the terminal has moved; Step 407, the source wireless network node determines, according to the policy, whether the access server is configured to cache data sent to the user; wherein, the wireless network node determines that the policy may be a connection state. with The target wireless network node address, if the connection is not fully established, does not need to notify the access server of the data cache;

Step 408: The wireless control point sends a registration result to the target wireless network node. Step 409: The target wireless network node forwards the registration result to the terminal.

Step 410: When paging, the downlink data of the user reaches the access server.

Step 411: The access server sends a paging request to a source wireless network node.

Step 412: The source wireless network node sends a paging request to a wireless control point.

Step 413: The wireless control point sends a paging broadcast to all wireless network nodes in a location range where the terminal is located;

Step 414: After the target wireless network node pages the user, establish a session between the target wireless network node and the terminal, and establish a load between the target wireless network node and the access server. Step 415, the access server and Data flow interaction between the terminals.

As shown in Figure 4, the downlink data is buffered into the access server. At this time, the access server needs to know whether the data should be cached, because the notification of the data cache is related to the data link, and the wireless network in the network. The node maintains and manages the data link information, and has sufficient information to determine whether to send a data cache notification to the access server (for example, in a semi-connected state, it may not need to send a data cache notification, which can reduce the processing load of the access server) . Therefore, the cache notification (step 407) needs to be initiated by the source wireless network node and should not be the responsibility of the wireless control point.

Flexible buffering of data. In the prior art, only the above non-switching (Fig. 3) and the switching between wireless network nodes (Fig. 4) are mentioned, and the scenario of switching across wireless control points is lacking. Therefore, in the case of flexible paging of paging data, the advantages of the above-mentioned cross-wireless network node process are considered, that is, the system architecture and function division are clear and clear, and the unified maintenance and traffic of the link information of the wireless network node can also be realized. Issues such as centralized management of control and paging have become the focus of urgent attention. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a method for implementing location update of an idle terminal after moving across a wireless control point, to solve the problem that the idle terminal of the wireless communication network performs location update after moving across the wireless control point. Provide users with flexible data caching needs. In order to solve the above technical problem, the present invention provides a method for implementing location update of an idle terminal after moving across a wireless control point, including the following steps:

(1) When the idle terminal location update operation is triggered, the idle terminal initiates a registration request to the target wireless control point via the target wireless network node, where the registration request carries session identification information;

(2) the target wireless control point determines, according to the session identification information carried in the registration request, whether the terminal has switched across the wireless control point;

(3) If the terminal has switched across the wireless control point, the target wireless control point notifies the source wireless control point that the terminal has moved.

The method of the present invention, further comprising:

(4) the source wireless control point notifies the source wireless network node that the terminal has moved and carries the target wireless network node address;

(5) The source wireless network node determines, according to the preset policy, whether to notify the access server to cache the data, and if it is determined that the notification is required, the source wireless network node sends a notification of the data cache to the access server, and carries the target wireless network node address. .

The preset policy in step (5) determines that the source wireless network node determines according to the network connection status and the target wireless node address, and if the connection is completely established, or the target wireless network node address changes, the source wireless network The node sends a notification of the data cache to the access server and carries the target wireless network node address.

Among them, further includes:

(6) The target wireless control point returns a registration result to the target wireless network node, and the target wireless network node forwards the registration result to the idle terminal. The method of the present invention, wherein the step (1) further comprises:

The target wireless control point saves location information of the current idle terminal.

The method of the present invention, wherein the step (2) comprises:

(21) the target wireless control point receives a registration request carrying session identification information;

(22) the target wireless control point determines whether the session identification information in the registration request is The node is allocated to determine whether the terminal has a handover across the wireless control point. If it is not the session identifier assigned by the node, it is determined that the terminal has switched across the wireless control point.

The method of the present invention, wherein the idle terminal location update operation in step (1) is triggered to be triggered by triggering or changing a paging zone by a timer.

The method according to the present invention, wherein the source wireless control point moves to an idle control terminal before the target wireless control point is triggered.

The method of the present invention, wherein the step (3) further comprises:

The target wireless control point requests user related information from the source wireless control point, and the source wireless control point returns the requested user related information to the target wireless control point.

The user related information includes: user session information and authentication information; and the usage protocol of the user related information is a text transmission protocol.

Compared with the prior art, the method of the present invention can effectively realize that when the wireless control point saves the terminal location information, the idle terminal updates the location information after moving between the wireless control points, which can meet the requirement of flexibly configuring the data cache point. problem.

BRIEF abstract

1 is a structural reference model diagram of a network implementation of packet data user access in the prior art of the present invention;

2 is a simplified flow chart of location update in a wireless communication network in the prior art of the present invention; FIG. 3 is a flow chart of prior art data buffering in a wireless network node according to the background art of the present invention;

4 is a flow chart of the prior art data cached in the access server according to the background art of the present invention;

5 is a flowchart of updating an end position of a terminal in an idle state after moving across a wireless control point in a wireless communication network according to an embodiment of the present invention;

FIG. 6 is a flowchart of a process for a terminal to page a user after a terminal in an idle state moves after moving across a wireless control point in a wireless communication network according to an embodiment of the present invention. Preferred embodiment of the invention

The embodiment of the present invention provides a method for performing location update after an idle terminal moves across a wireless control point in a wireless communication network (including a next-generation evolved network), which can provide users with faster and more convenient location registration performance. The method includes the following steps:

(1) After the idle state terminal moves to the new wireless control point. The jurisdiction is triggered, the idle terminal is triggered to perform the registration request;

(2) the idle terminal location registration request message requests the registration of the location information by the target wireless network node to the target wireless control node, where the target wireless control point saves the current user location information; (3) the target wireless control point passes the registration The session identifier in the request message determines whether the terminal has a handover across the wireless control point. If the session identifier is not allocated by the local node, the terminal is considered to have moved across the wireless control point, and the source wireless control point user is notified that the user has moved. And requesting related information of the user; the source wireless control point returns the requested user related information to the target wireless control point;

(4) the source radio control point notifies the source radio network node that the terminal has moved and carries the address of the target radio network node;

(5) the source wireless network node determines, according to the policy, whether to notify the access server to cache data sent to the terminal; if the notification needs to be sent, carries the address of the target wireless network node;

(6) passing the target wireless network node, the target wireless control point returns the registration result to the terminal;

In step (1), the registration request may also be triggered by a timer; wherein, in step (5), the wireless network node determining policy may be a connection state and an address of a target wireless network node, if the connection is not If the address of the target wireless network node is completely established, or the address of the target wireless network node is unchanged, there is no need to notify the access server to perform data caching; if the connection is completely established, or the address of the target wireless network node changes, the access server needs to be notified of data caching. .

In order to better describe the implementation features and methods of the present invention, the implementation of the technical solutions will be further described in detail below with reference to the accompanying drawings. As shown in FIG. 5, it is a flowchart for updating a terminal position of a terminal in an idle state after moving across a wireless control point in a wireless communication network according to a preferred manner of the present invention. The specific steps are as follows: Step 501: The terminal and the source Data stream interaction between the wireless network node and the access server;

Step 502: The terminal enters an idle state.

Step 503: The terminal moves to trigger a location update operation, where the trigger location update operation mainly refers to a judgment trigger triggered by a change of a paging zone (ZONE) after the idle terminal moves to the target wireless control point, that is, a paging zone change Afterwards, the terminal determines and initiates the request by means of the wireless side (for example, interaction between the terminal and the network); further, the location update operation may also be triggered by a timer;

Step 504: The terminal sends a registration request to the wireless network node (ie, the target wireless network node), where the registration request carries the session identifier and the user identifier.

Step 505: The target wireless network node forwards a registration request carrying a session identifier and a user identifier to the target wireless control point, where the target wireless control point saves current user location information.

Step 506: The target wireless control point determines whether the terminal has switched over the wireless control point by using the session identification information in the registration request message. For example, if the session identifier is not allocated by the local node, the terminal is considered to have cross-wireless control. Point-to-ground mobile), and notify the source wireless control point user that the handover has been performed, and request related information of the user, such as authentication information and session information; further, the target wireless control point may know the location of the source wireless control point through the session identifier. Further, the protocol that the target wireless control point requests the source wireless control point to use the user related information may be a text transmission protocol;

Step 507: The source wireless control point returns the requested user related information to the target wireless control point. Further, the protocol used by the source wireless control point to respond to the user related information to the target wireless control point may be a text transmission protocol.

Step 508: The source wireless control point notifies the source wireless network node that the terminal has moved, and carries the address of the target wireless network node.

Step 509: The source wireless network node finds that it needs to notify the access server to perform data caching, and then sends a message to the access server, so that when the downlink data arrives at the access server, the access service The server caches the data; in addition, the message carries the address information of the target wireless network node, so as to enable the access server to notify the target wireless network node to make a paging request when paging; The source wireless network node determines whether it is necessary to notify the access server to perform data caching according to the connection state and the target wireless network node address. If the connection is not fully established, or the target wireless network node address does not change, the source wireless The network node does not need to send a notification of the data cache to the access server; otherwise, the notification;

Step 510: The target wireless control point returns a registration result to the target wireless network node. Step 511: The target wireless network node forwards the registration result to the terminal.

Wherein, step 507 and step 508 can be performed simultaneously.

FIG. 6 is a flowchart illustrating a process of paging a user after a terminal in an idle state is moved in a wireless communication network in a preferred manner according to the embodiment of the present invention shown in FIG. The specific steps are as follows:

Step 601: The downlink data of the user reaches the access server.

Step 602: The access server sends a paging request to the target wireless network node. Step 603: The target wireless network node sends a paging request to the target wireless control point. Step 604: The target wireless control point is sent to the terminal All radio network nodes in the location range send paging broadcasts;

Step 605: After the target wireless network node pages the user, establish a session between the target wireless network node and the terminal, and establish a bearer between the target wireless network node and the access server. Step 606, the AJ service is performed. The device interacts with the terminal for data flow.

The invention provides a way for the user to perform location update after moving over the wireless control point on the basis of considering the paging performance of the wireless communication network, and transmits the target wireless control to the access server through the source wireless control point and the source wireless network node. At the point location, the data cache sent to the incoming server is responsible for the wireless network node responsible for link maintenance and management. From the practical application point of view, the data flexible cache can be satisfied.

The invention realizes a method for updating the location of the idle terminal after moving across the wireless control point in the wireless communication network under the condition that the existing system has the least modification and influence, and can meet the requirement of flexible data buffering. The location update procedure in the above embodiment may be applied to other systems adopting 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 not necessarily be the same, but in the process The logical relationship is the same.

The above is only the illustrative embodiments of the present invention, and it should be understood that there are many variations that may be made without departing from the spirit and scope of the exemplary embodiments of the invention, and all such Variations are intended to be included within the scope of the appended claims. INDUSTRIAL APPLICABILITY A method for performing location update of an idle terminal after moving across a wireless control point in the present invention is applicable to the field of communication technologies, and is particularly suitable for use in a next-generation mobile communication network for realizing location update and data cache after terminal movement. The problem provides a good solution. In the case where the wireless control point stores the terminal location information, the idle terminal updates the location information after the wireless control and the inter-movement, which can meet the requirement of the flexible configuration data cache point.

Claims

Claim

A method for implementing location update after an idle terminal moves across a wireless control point, characterized in that it comprises the following steps:

2. The method of claim 1, wherein the method further comprises:

The method according to claim 2, wherein the preset policy in step (5) is that the source wireless network node determines according to the network connection status and the target wireless node address, and if the connection is completely established, Or the target wireless network node address changes, the source wireless network node sends a notification of the data cache to the access server, and carries the target wireless network node address.

4. The method of claim 2, wherein the method further comprises:

(6) The target wireless control point returns a registration result to the target wireless network node, and the target wireless network node forwards the registration result to the idle terminal.

The method according to claim 1, wherein the step (1) further comprises: the target wireless control point storing location information of the current idle terminal.

The method according to claim 1, wherein the step (2) further comprises: (21) the target wireless control point receiving the registration request carrying the session identification information; (22) the target wireless control point determines whether the terminal has been switched over the wireless control point by determining whether the session identification information in the registration request is allocated by the node, if not the session identifier allocated by the node, Then it is determined that the terminal has a handover across the wireless control point.

7. The method according to claim 1, wherein the idle terminal location update operation in step (1) is triggered to trigger by triggering or changing a paging area by a timer.

8. The method as claimed in claim 1, wherein the step (3) further comprises: the target wireless control point requesting user related information from the source wireless control point, and the source wireless control point returns the requested user related information. Give the target wireless control point, where

The user related information includes: a user tongue information and an authentication information; and the usage protocol of the user related information is a text transmission protocol.

9. The method according to claim 1 or 2, wherein the source wireless control point is an idle terminal moving to a wireless control point before the target wireless control point is triggered.

The method according to claim 4, wherein the method further comprises: a paging step after the terminal in the idle state moves after moving across the wireless control point, specifically:

After receiving the downlink data of the user, the access server sends a paging request to the target wireless network node, and the target wireless network node forwards the paging request to the target wireless control point;

The target wireless control point sends a paging broadcast to all wireless network nodes in the location range of the terminal;

After the target wireless network node pages the user, establish a session between the target wireless network node and the terminal, and establish a bearer between the target wireless network node and the access server;

The access server performs data stream interaction with the terminal.