CN101155397B - Position updating method and system - Google Patents

Abstract

The invention discloses a location update method, which includes: the access service network where the mobile terminal is currently located verifies the location update request initiated by the mobile terminal, and after the verification is passed, anchors the paging control to the mobile terminal The controller returns a location update confirmation; after receiving the location update confirmation, the anchor paging controller of the mobile terminal sends a location update confirmation response to the access service network where the mobile terminal is currently located. The invention also discloses a position updating system. After applying the present invention, the location update confirmation can be successfully received, so that the mobile terminal information kept on the paging controller can be consistent with the current state of the mobile terminal. In addition, the mobile terminal information kept on the anchor authenticator can also be consistent with the current state of the mobile terminal.

Description

A location update method and system

technical field

The present invention relates to the technical field of Worldwide Interoperability for Microwave Access (Wimax), and more specifically, the present invention relates to a location update method and system.

Background technique

Worldwide Interoperability for Microwave Access (Wimax), a Wireless Metropolitan Area Network (WMAN) technology, is a new air interface standard proposed for microwave and millimeter wave frequency bands. It is used to connect 802.11a wireless access hotspots to the Internet, and can also connect environments such as companies and homes to wired backbones. It can be used as a wireless extension technology of cable and DSL to realize wireless broadband access.

Wimax is an emerging wireless communication technology that provides high-speed Internet-oriented connections. Wimax is also a powerful wireless technology, using this technology, users can communicate data at a very fast speed within a range of 50 kilometers.

In the current Wimax standard, when the paging relay receives the location update request (RNG_REQ) of the mobile terminal, it sends a location update request (LU_Request) to the paging controller. The anchor authenticator interacts, confirms and obtains the user's context (Context) information. Then, the paging controller sends a location update response message (LU_Response) to the paging relay that sent the location update request. After receiving the location update response, the paging relay verifies the original RNG-REQ message, and sends a location update request response (RNG-RSP) to the mobile terminal, and then the paging relay sends a location update confirmation (LU_Confirm ). If paging controller migration occurs, next, the paging controller can send a mobile terminal information confirmation (MS Info Ack) message to the anchor authenticator.

FIG. 1 is a flow chart of location update processing in the prior art. As shown in Figure 1, the method includes:

Step 101: If the conditions described in IEEE802.16 are met, in idle (Idle) mode, when the mobile terminal performs a secure location update, the mobile terminal sends a RNG-REQ message to the base station, and the RNG-REQ message contains the mobile terminal. The identifier of the paging controller (PC) to which it belongs. If relevant security information is stored on the base station, the base station should use HMAC/CMAC to verify the RNG-REQ message;

Step 102: the access service network ASN(a) sends a location update request (LU-Request) to the ASN of the PC anchored by the mobile terminal, and the message may pass through multiple relays during transmission;

Step 103: After the ASN where the anchor PC is located receives the LU-Request message, it requests relevant information from the location register. If the anchor authenticator saves relevant security information, the anchor PC will receive the anchor of the mobile terminal The authenticator identifies, and then sends a context (Context) request message to the anchor authenticator;

Step 104: After the ASN related to the anchor authenticator receives the context request message, it generates the AK and the AK context of the mobile terminal, and sends a context response message to the ASN where the anchor PC is located;

Step 105: The ASN where the anchor PC of the mobile terminal is located generates a location update response message (LU-RSP), and responds to the paging relay with the LU-RSP message;

Step 106: The ASN where the mobile terminal is currently located verifies the RNG-REQ message according to the received security parameters, and if the verification is passed, sends the RNG-RSP message with HMAC/CMAC to the mobile terminal;

Step 107: Once the RNG-REQ message is verified, the ASN where the mobile terminal is currently located sends a location update confirmation (LU-Confirm) containing the result indication to the ASN where the anchor PC is located, and the anchor PC updates the location register after receiving it. The location information of the mobile terminal. Once a LU-Confirm message indicating successful PC migration is received, the old anchor PC should clear the information in the location register of the mobile terminal, the new PC becomes the anchor PC, and the original anchor PC is released;

Step 108: If the migration of the anchor PC occurs during the location update process, the old anchor PC sends a mobile terminal information acknowledgment (MSInfo Ack) with the location update result to the ASN associated with the anchor authenticator.

Step 109-Step 110: The new anchor PC reports the relevant context information of the mobile terminal to the anchor data channel unit and the external agent unit of the mobile terminal.

However, in the prior art, when the location update acknowledgment is not received by the paging controller, the state information corresponding to the mobile terminal in the paging controller cannot be updated to the current state, thereby remaining in the paging controller The mobile terminal information on cannot be consistent with the current state of the mobile terminal.

Similarly, if the mobile terminal information acknowledgment sent by the paging controller to the anchor authenticator is not received by the anchor authenticator, then the anchor authenticator has no way of knowing that the terminal may be due to a new paging call after the migration of the paging controller. The location of the call controller, and the mobile terminal information kept on the anchor authenticator cannot be consistent with the current state of the mobile terminal.

Contents of the invention

In view of this, the main purpose of the present invention is to propose a location update method, so that the mobile terminal information kept on the paging controller can be consistent with the current state of the mobile terminal.

Another object of the present invention is to propose a location updating system so that the mobile terminal information kept on the paging controller can be consistent with the current state of the mobile terminal.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A location update method, the method comprising:

The access service network where the mobile terminal is currently located verifies the location update request initiated by the mobile terminal, and returns a location update confirmation to the anchor paging controller of the mobile terminal after the verification is passed;

After receiving the location update confirmation, the anchor paging controller of the mobile terminal sends a location update confirmation response to the access service network where the mobile terminal is currently located.

After the access service network where the mobile terminal is currently located sends a location update confirmation to the paging controller, the method further includes:

The access service network where the mobile terminal is currently located starts a timer, and resends the location update request when no location update confirmation response is received within the time limit of the timer.

The method further includes: presetting the number of retransmissions N1;

The resending location update request is: resending the location update request N1 times.

The method further includes:

When the location update request is resent N1 times, and the location update confirmation response is still not received, the mobile terminal is notified to re-connect to the access service network, or the mobile terminal is paged and the mobile terminal is required to perform location update again. renew.

The method further includes:

When the anchor paging controller of the mobile terminal migrates, the old anchor paging controller sends the mobile terminal information confirmation with the location update result to the anchor authenticator;

After receiving the mobile terminal information confirmation, the anchor authenticator sends a mobile terminal information confirmation response to the old anchor paging controller.

After the old anchor paging controller sends the mobile terminal information confirmation with the location update result to the anchor authenticator, the method further includes:

The old anchor paging controller starts a timer, and resends the mobile terminal information acknowledgment when no mobile terminal information acknowledgment response is received within the time limit of the timer.

The method further includes: presetting the number of retransmissions N2;

The resending location update request is: resending the mobile terminal information acknowledgment N2 times.

The method further includes:

When the mobile terminal information confirmation is resent N2 times, and the mobile terminal information confirmation response is still not received, the mobile terminal is notified to re-connect to the access service network, or the mobile terminal is paged and the mobile terminal is required to re-enter the service network. Location update.

The method further includes:

After receiving the location update confirmation response, the access service network where the mobile terminal is currently located sends a location update request response to the mobile terminal to notify the mobile terminal of a location update result.

A location update system, the system includes a mobile terminal, an access service network where the mobile terminal is currently located, and an anchor paging controller for the mobile terminal, wherein:

The mobile terminal is configured to send a location update request to the access service network where the mobile terminal is currently located;

The access service network where the mobile terminal is currently located is used to verify the location update request sent by the mobile terminal, and send a location update confirmation to the anchor paging controller of the mobile terminal after the verification is passed;

The mobile terminal anchor paging controller is configured to send a location update confirmation response to the access service network where the mobile terminal is currently located after receiving the location update confirmation.

The system further includes an anchor authenticator, wherein when the mobile terminal anchor paging controller migrates, the old anchor paging controller is used to send a mobile terminal information confirmation with a location update result to the anchor authenticator ;

The anchor authenticator is configured to send a mobile terminal information confirmation response to the old anchor paging controller after receiving the mobile terminal information confirmation.

The access service network where the mobile terminal is currently located further includes a timer for timing;

The access service network where the mobile terminal is currently located is used to start a timer, and resend the location update request when no location update confirmation response is received within the time limit of the timer.

said old anchor paging controller further comprising a timer,

The old anchor paging controller is used to start a timer, and resend the mobile terminal information acknowledgment when no mobile terminal information acknowledgment response is received within the time limit of the timer.

The access service network where the mobile terminal is currently located is further configured to send a location update request response to the mobile terminal after receiving the location update confirmation response, so as to notify the mobile terminal of a location update result.

From the above technical solutions, it can be found that in the present invention, first, the access service network where the mobile terminal is currently located verifies the location update request initiated by the mobile terminal, and after the verification is passed, the mobile terminal anchors paging The controller sends a location update confirmation; after the mobile terminal anchor paging controller receives the location update confirmation, it sends a location update confirmation response to the access service network where the mobile terminal is currently located. It can be seen that after applying the present invention, the location update confirmation can be successfully received, so that the mobile terminal information kept on the paging controller is consistent with the current state of the mobile terminal.

In addition, in the present invention, when the anchor paging controller of the mobile terminal migrates, the old anchor paging controller sends the mobile terminal information confirmation with the location update result to the anchor authenticator; After the mobile terminal information is confirmed, send a mobile terminal information confirmation response to the old anchor paging controller. Therefore, the mobile terminal information confirmation can be successfully received by the anchor authenticator, so the mobile terminal information kept on the anchor authenticator can also be consistent with the current state of the mobile terminal.

Description of drawings

FIG. 1 is a schematic flow diagram of a mobile terminal location update during a secure location update process in the prior art;

FIG. 2 is an exemplary flow chart of a secure location update process according to the present invention;

Fig. 3 is an exemplary flow chart of a mobile terminal location update process according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of an exemplary system structure of a secure location update process according to the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The main idea of the present invention is: after the paging controller receives the location updating confirmation, it will confirm the sending source. In addition, after receiving the mobile terminal information confirmation, the anchor authenticator preferably responds to the paging controller that sent the message. Moreover, in the present invention, preferably, a timer can be started for the corresponding message on the paging relay and the paging controller, so as to protect the reception of the message.

FIG. 2 is a schematic flowchart of an exemplary secure location update process according to the present invention. As shown in Figure 2, the method includes:

Step 201: The access service network where the mobile terminal is currently located verifies the location update request initiated by the mobile terminal, and sends a location update confirmation to the anchor paging controller of the mobile terminal after the verification is passed;

Step 202: After receiving the location update confirmation, the anchor paging controller of the mobile terminal sends a location update confirmation response to the access service network where the mobile terminal is currently located.

In the above process, after the access service network where the mobile terminal is currently located sends a location update confirmation to the paging controller, the method may further include:

Preferably, the access service network where the mobile terminal is currently located starts a timer, and resends the location update request when no location update confirmation response is received within the time limit of the timer. More preferably, the number of retransmissions N1 can also be set in advance. The access service network where the mobile terminal is currently located starts a timer, and when the location update confirmation response is not received within the time limit of the timer, the retransmission is resent N1 times. location update request.

When the location update request is resent N1 times, and the location update confirmation response is still not received, it will be processed according to the abnormal situation. These processing include but are not limited to: notify the mobile terminal to re-access the access service network , or page the mobile terminal and request the mobile terminal to perform location update again.

In the above process, when the anchor paging controller of the mobile terminal migrates, the old anchor paging controller sends the mobile terminal information confirmation with the location update result to the anchor authenticator; the anchor authenticator receives the After the mobile terminal information is confirmed, send a mobile terminal information confirmation response to the old anchor paging controller.

Preferably, after the old anchor paging controller sends the mobile terminal information confirmation with the location update result to the anchor authenticator, the method further includes: the old anchor paging controller starts a timer, and when When the mobile terminal information confirmation response is not received within the time limit of the timer, the mobile terminal information confirmation is resent.

More preferably, the number of retransmissions N2 is preset, and after the old anchor paging controller sends the mobile terminal information confirmation with the location update result to the anchor authenticator, the old anchor paging controller starts the timer , and when the mobile terminal information confirmation response is not received within the time limit of the timer, resend the mobile terminal information confirmation N2 times.

When the mobile terminal information acknowledgment is not received after N2 retransmissions of the mobile terminal information acknowledgment, it will be processed according to the abnormal situation. These processing include but are not limited to: notify the mobile terminal to re-access the access service network, or page the mobile terminal and request the mobile terminal to perform location update again.

Wherein, after receiving the location update confirmation response, the access service network where the mobile terminal is currently located sends a location update request response to the mobile terminal to notify the mobile terminal of the location update result.

Based on the above process, the preferred embodiments of the present invention will be described in detail below. Fig. 3 is an exemplary flowchart of a location update process of a mobile terminal according to an embodiment of the present invention. As shown in Figure 3, the method includes:

Step 301: If the conditions described in IEEE802.16 are met, in Idle mode, when the mobile terminal (MS) performs a secure location update, the mobile terminal sends a RNG-REQ message to the base station, and the RNG-REQ message contains the mobile terminal. The ID of the PC to which it belongs. If relevant security information is stored on the base station, the base station should use HMAC/CMAC to verify the RNG-REQ message;

Step 302: ASN (a) sends a location update request (LU-Request) to the ASN of the PC anchored by the mobile terminal, and the message may pass through multiple relays during transmission;

Step 303: After the ASN where the anchor PC is located receives the LU-Request message, it requests relevant information from the location register. If the anchor authenticator saves relevant security information, the anchor PC will receive the mobile terminal's The anchor authenticator identifies, and then sends a context (context) request message to the anchor authenticator.

Step 304: When the ASN associated with the anchor authenticator receives the context request message, it generates an AK and the AK context of the mobile terminal, and sends a context response message to the ASN where the anchor PC is located.

Step 305: the ASN where the anchor PC of the mobile terminal is located generates a location update response message (LU-RSP), and responds to the paging relay with the LU-RSP message;

Step 306-Step 307: The ASN where the mobile terminal is currently located verifies the RNG-REQ message according to the received security parameters. If the verification is passed, an RNG-RSP message with HMAC/CMAC is sent to the mobile terminal;

Here, if the message is sent again in step 311, the RNG-RSP message may not be sent temporarily at this time.

Step 308: Once the RNG-REQ message is verified, the ASN where the mobile terminal is currently located sends a location update confirmation (LU-Confirm) including the result indication to the ASN where the anchor PC is located. At the same time, a timer T1 is started to monitor whether a subsequent location update confirmation response (LU_Ack) can be received. If the corresponding message is not received within the timer time frame, the original sent message needs to be resent according to the specified number of resends. If it is still not received after a timeout or timeout, it needs to be handled according to the abnormal situation. These processes include but are not limited to: requiring the terminal to re-enter the network or paging the terminal and requiring it to update its location again.

After receiving the location update confirmation, the anchor PC sends a location update confirmation response to the ASN where the mobile terminal is currently located, and updates the location information of the mobile terminal in the location register. Once a LU-Confirm message indicating successful PC migration is received, the old anchor PC should clear the information in the location register of the mobile terminal, the new PC becomes the anchor PC, and the original anchor PC is released;

Step 309: If the migration of the anchor PC occurs during the location update process, the old anchor PC should send a mobile terminal information acknowledgment (MSInfo Ack) with the location update result to the ASN associated with the anchor authenticator. At the same time, a timer T2 is started to monitor whether the mobile terminal information confirmation response (MS_Info_Ack.confirm) message sent back by the anchor authenticator is received. If the corresponding message is not received within the timer time frame, the original sent message needs to be resent according to the specified number of resends. If it is still not received after a timeout or timeout, it needs to be handled according to the abnormal situation. These processes include but are not limited to: requiring the terminal to re-enter the network or paging the terminal and requiring it to update its location again.

If the location update results in a failure, the anchor authenticator shall keep their parameters unchanged, otherwise, the anchor authenticator shall update the anchor PC ID of the MS in the MS data structure.

Step 310: The anchor authenticator sends a MS_Info_Ack.confirm message, including the operation result.

Step 311: After receiving the MS_Info_Ack.confirm message sent by the anchor authenticator, the anchor authenticator sends a location update confirmation response (LU_Ack) to the paging relay and the paging agent, and includes the operation result.

Step 312: The base station may send an RNG-RSP after receiving the location update confirmation message containing the result, indicating that the location update of the mobile terminal is successful.

At this time, if the RNG-RSP message has been sent in step 307, then this step does not send the RNG-RSP message.

Step 313-Step 314: Anchor PC migration process. The new anchor PC reports the relevant context information of the mobile terminal to the anchor data path unit and the foreign agent unit of the mobile terminal.

The invention also proposes a location update system. FIG. 4 is a schematic diagram of an exemplary structure of a location update message system according to the present invention. As shown in Figure 4, the system includes a mobile terminal 401, an access service network 402 where the mobile terminal is currently located, and a mobile terminal anchor paging controller 403, wherein:

The mobile terminal 401 is configured to send a location update request to the access service network 402 where the mobile terminal 401 is currently located;

The access service network 402 where the mobile terminal is currently located is used to verify the location update request sent by the mobile terminal 401, and send a location update confirmation to the mobile terminal anchor paging controller 403 after the verification is passed;

The mobile terminal anchor paging controller 403 is configured to send a location update confirmation response to the access service network 402 where the mobile terminal 401 is currently located after receiving the location update confirmation.

Preferably, the system further includes an anchor authenticator 404, wherein when the mobile terminal anchor paging controller 403 migrates, the old anchor paging controller is used to send the anchor authenticator 404 with a location update Result mobile terminal information confirmation;

The anchor authenticator 404 is configured to send a mobile terminal information confirmation response to the old anchor paging controller after receiving the mobile terminal information confirmation.

In addition, the access service network where the mobile terminal is currently located may further include a timer for timing; at this time:

The access service network where the mobile terminal is currently located is used to start a timer after sending a location update confirmation to the paging controller, and resend the location if no location update confirmation response is received within the time limit of the timer. update request.

Older anchor paging controllers can also further include timers, in which case:

The old anchor paging controller is used to start a timer after sending the mobile terminal information confirmation with the location update result to the anchor authenticator, and when the mobile terminal information is not received within the time limit of the timer When confirming the response, resend the mobile terminal information confirmation.

The access service network where the mobile terminal is currently located may be further configured to send a location update request response to the mobile terminal after receiving the location update confirmation response, so as to notify the mobile terminal of a location update result.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (12)

1. A location update method, characterized in that the method comprises: The access service network where the mobile terminal is currently located verifies the location update request initiated by the mobile terminal, and returns a location update confirmation to the anchor paging controller of the mobile terminal after the verification is passed; After the mobile terminal anchor paging controller receives the location update confirmation, it sends a location update confirmation response to the access service network where the mobile terminal is currently located; the access service network where the mobile terminal is currently located starts a timer, And when the location update confirmation response is not received within the time limit of the timer, the mobile terminal resends the location update request. 2. The location update method according to claim 1, characterized in that the method further comprises: presetting the number of retransmissions N1; The resending location update request is: resending the location update request N1 times. 3. The location update method according to claim 2, characterized in that the method further comprises: When the location update request is resent N1 times, and the location update confirmation response is still not received, the mobile terminal is notified to re-connect to the access service network, or the mobile terminal is paged and the mobile terminal is required to perform location update again. renew. 4. The location update method according to claim 1, characterized in that the method further comprises: When the anchor paging controller of the mobile terminal migrates, the old anchor paging controller sends the mobile terminal information confirmation with the location update result to the anchor authenticator; After receiving the mobile terminal information confirmation, the anchor authenticator sends a mobile terminal information confirmation response to the old anchor paging controller. 5. The location update method according to claim 4, characterized in that the method further comprises: The old anchor paging controller starts a timer, and resends the mobile terminal information acknowledgment when no mobile terminal information acknowledgment response is received within the time limit of the timer. 6. The location update method according to claim 5, characterized in that the method further comprises: presetting the number of retransmissions N2; The resending location update request is: resending the mobile terminal information acknowledgment N2 times. 7. The location update method according to claim 6, characterized in that the method further comprises: When the mobile terminal information confirmation is resent N2 times, and the mobile terminal information confirmation response is still not received, the mobile terminal is notified to re-connect to the access service network, or the mobile terminal is paged and the mobile terminal is required to re-enter the service network. Location update. 8. The location update method according to any one of claims 1-7, characterized in that the method further comprises: After receiving the location update confirmation response, the access service network where the mobile terminal is currently located sends a location update request response to the mobile terminal to notify the mobile terminal of a location update result. 9. A location update system, characterized in that the system includes a mobile terminal, an access service network where the mobile terminal is currently located, and a mobile terminal anchor paging controller, wherein: The mobile terminal is configured to send a location update request to the access service network where the mobile terminal is currently located; The access service network where the mobile terminal is currently located is used to verify the location update request sent by the mobile terminal, and return a location update confirmation to the anchor paging controller of the mobile terminal after the verification is passed; The mobile terminal is anchored by a paging controller, configured to send a location update confirmation response to the access service network where the mobile terminal is currently located after receiving the location update confirmation; The access service network where the mobile terminal is currently located further includes a timer for timing; The access service network where the mobile terminal is currently located is used to start a timer, and when the location update confirmation response is not received within the time limit of the timer, the mobile terminal resends the location update request. 10. The location update system according to claim 9, characterized in that the system further comprises an anchor authenticator, wherein when the mobile terminal anchor paging controller migrates, the old anchor paging controller uses To send the mobile terminal information confirmation with the location update result to the anchor authenticator; The anchor authenticator is configured to send a mobile terminal information confirmation response to the old anchor paging controller after receiving the mobile terminal information confirmation. 11. The location update system according to claim 10, wherein the old anchor paging controller further comprises a timer, The old anchor paging controller is used to start a timer, and resend the mobile terminal information acknowledgment when no mobile terminal information acknowledgment response is received within the time limit of the timer. 12. The location updating system according to any one of claims 9-11, characterized in that, The access service network where the mobile terminal is currently located is further configured to send a location update request response to the mobile terminal after receiving the location update confirmation response, so as to notify the mobile terminal of a location update result.

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