WO2011012069A1

WO2011012069A1 - Method, device and system for updating routing area identifier

Info

Publication number: WO2011012069A1
Application number: PCT/CN2010/075494
Authority: WO
Inventors: 杨照宇
Original assignee: 华为技术有限公司
Priority date: 2009-07-27
Filing date: 2010-07-27
Publication date: 2011-02-03
Also published as: CN101969676B; CN101969676A

Abstract

A method, device and system for updating routing area identifier are provided by the embodiments of the present invention. The update method comprises that an access network device constructs a first routing area identifier update message including a ground routing area identifier; said access network device sends said first routing area identifier update message to the user equipment, so that said user equipment uses said ground routing area identifier to replace an air routing area identifier stored in the local. In the routing area identifier update method and the access point device provided by the embodiments of the present invention, a routing area identifier update message is built by the AP before the UE performs a service interaction with the core network, and the UE is indicated to update the stored air RAI to the ground RAI stored by the core network, thus the successful ratio of the service interaction is ensured and the quality of the service serving is enhanced.

Description

Routing area identifier update method, device and system

This application claims priority to Chinese Patent Application No. 200910089903.0, entitled "Routing Area Identification Update Method and Access Point Equipment", filed on July 27, 2009, the entire contents of which are incorporated by reference. In this application.

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a routing area identifier updating method, device, and system. Background technique

An access point (Access Point; hereinafter referred to as AP) device based on the Wideband Code Division Multiple Access (WCDMA) system is used for user equipment (User Equipment; UE) Admission control is an important function of the AP. Specifically, when the UE accesses the AP, the AP will be based on the current admission mode (for example, the UE with the access authority, the AP will send a Location Area Updating (LAU) or a routing area update ( Routing area Updating; hereinafter referred to as: RAU) Refusal message, and the refusal reason value may cause the UE to have the same Location Area Identifier (LAI) or Routing Area Identifier for a long time. (hereinafter referred to as: RAI) initiates the registration process in the cell. To prevent a UE from being denied access after an AP cell is rejected, but the other AP cells with the same access rights but the same LAI/RAI cannot be accessed, The LAI/RAI of each AP is different. At the same time, for an access gateway (Access Gateway; hereinafter referred to as AG), it is necessary to manage multiple (currently 65535) APs under one AG, if each AP's LAI/RAI Different, it will bring a big burden to the core network (Core Network; hereinafter referred to as: CN). In view of the above two points, the introduction of LAI/RAI separation in the prior art Resistance, i.e., assigned a LAI / RAI i.e. "ground LAI / RAI" CN at a plurality of AP side, while each AP is assigned a unique LAI / RAI under the AG i.e., "empty account when Port LAI/RAI"; When the UE accesses, the AP makes a transition between the ground LAI/RAI and the air interface LAI/RAI, so that in the UE's view, the LAI/RAI of each AP cell is different; Therefore, all the AP cells below have the same LAI/RAI. Therefore, in general, the air interface LAI/RAI is different from the ground LAI/RAL.

In the prior art, the RAIs stored on the network side and the terminal side are inconsistent, thus causing some services to fail. Summary of the invention

The embodiment of the invention provides a method, a device and a system for updating a routing area identifier, so as to ensure a service success rate and improve service quality.

An embodiment of the present invention provides a method for updating a routing area identifier, including:

The access network device constructs a first routing area identifier update message including a ground routing area identifier; the access network device sends the first routing area identifier update message to the user equipment, so that the user equipment uses the ground routing area The identifier replaces the locally saved air interface routing area identifier.

The embodiment of the invention further provides a method for updating a routing area identifier, including:

Receiving, by the user equipment, the first routing area identifier update message that is sent by the access network device to the user equipment, including the ground routing area identifier;

The user equipment replaces the locally saved air interface routing area identifier with the ground routing area identifier.

An embodiment of the present invention provides an access point device, including:

a first module, configured to send the first routing area identifier update message to the user equipment, so that the user equipment uses the ground The routing area identifier replaces the locally saved air interface routing area identifier.

The embodiment of the invention further provides a user equipment, which is characterized in that it comprises:

a first receiving module, configured to receive a first routing area identifier update message sent by the access point device, where the first routing area identifier update message carries a ground routing area identifier; The first processing module is configured to replace the stored air interface routing area identifier with the ground routing area identifier according to the first routing area identifier update message.

The embodiment of the invention further provides a network system, including the foregoing access point device and user equipment. In the routing area identifier updating method, device, and system provided by the embodiment of the present invention, before the UE performs service interaction with the core network, the routing area identifier update message is constructed by the AP, and the UE is instructed to update the stored air interface RAI to the core network. The stored ground RAI ensures the success rate of service interaction and improves the quality of service. DRAWINGS

1 is a flowchart of Embodiment 1 of a method for updating a routing area identifier according to the present invention;

2 is a flowchart of Embodiment 2 of a method for updating a routing area identifier according to the present invention;

3 is a signaling flow chart of a UE switching from a 3G network to a GRPS cell according to an embodiment of the present invention; FIG. 4 is a signaling diagram of a handover processing failure process between PS services in the present invention;

FIG. 5 is a signaling diagram of a service release processing process in a cell that is not switched to a GPRS network after the PS service is established according to the present invention;

6 is a flowchart of Embodiment 3 of a method for updating a routing area identifier according to the present invention;

7 is a schematic structural diagram of Embodiment 1 of an access point device according to the present invention;

8 is a schematic structural diagram of Embodiment 2 of an access point device according to the present invention;

9 is a schematic structural diagram of an embodiment of a user equipment according to the present invention;

FIG. 10 is a schematic structural diagram of an embodiment of a network system according to the present invention. detailed description

The technical solutions of the embodiments of the present invention are further described below with reference to the accompanying drawings and specific embodiments.

In the existing AP solution, when the PS service of the UE is switched from the AP cell to the GPRS network through the "Cell Change Order From Utran" process, since the RAI maintained by both the UE and the CN is different, the handover process may fail. Although the UE can camp on GPRS by re-initiating the registration process The network, but the data transmission between the UE and the network is interrupted and cannot be recovered. In addition, there is a case where the AP sends a radio resource control (Radio Resource Control; hereinafter referred to as RRC) release message to the UE for some reason. In the case where the cause of the signal is a direct signalling connection re-establishment (hereinafter referred to as DSCR), the UE performs cell reselection according to a cell reselection criterion algorithm, such as a cell signal strength, and selects the selected cell. The cell establishes an RRC connection, and then sends a routing area update request message to the selected cell to carry the stored air interface RAI. If the selected cell is a non-AP other network, for example, the RNC and the NODEB form a radio access network, the connection is performed. The incoming network will forward the air interface RAI reported by the UE directly to the core network. Since the Serving GPRS Support Node (hereinafter referred to as SGSN) in the core network stores the ground RAI and is inconsistent with the air interface RAI, the SGSN cannot find the original AP, and then sends an RAU reject message to the UE, so that the DSCR process For the above-mentioned deficiencies, the embodiment of the present invention provides a solution for constructing a routing area identifier update message on the AP side, which carries a ground RAI, and then sends the constructed routing area identifier update message to the UE to indicate that the UE will The stored air interface RAI is updated to the ground RAI to ensure the smooth progress of the subsequent business processes. The technical solution provided by the embodiment of the present invention can be implemented in the framework of the 3GPP protocol, is easy to implement, and has good compatibility; and the technical solution is not limited to the AP product of the WCDMA standard, and is applicable to other standards such as the TD-SCDMA AP. .

The embodiment of the present invention relates to two application environments, where an application environment is in an RRC connection state, and the AP actively sends a self-established routing area identifier update message to the UE, where the message carries the ground RAI information, so that the UE receives the message. The stored air interface RAI information is updated to the ground RAI information; so that when the UE tangs from the AP cell to the GPRS cell, the RAI is the ground RAI information in the "Routing Area Update Request" message initiated by the UE to the GPRS cell, so in the GPRS network The SGSN searches for the 3G paging table according to the ground RAI (the table is configured with the corresponding relationship between the ground RAI and the AG) to find the corresponding AG; the AG then pages the original AP through the corresponding relationship established with the AP, thereby completing the UE. The process of switching from an AP cell to a GPRS cell.

Another application environment is that an RRC connection is sent to the UE before the AP triggers the DSCR process. Before releasing the message, the reason value carried in the message is a DSCR, and the routing area identifier update message is pre-configured, and the routing area identifier update message is sent to the UE, where the routing area identifier update message carries the ground RAI information so that the UE receives After the message, the stored air interface RAI information is updated to the terrestrial RAI information; thus, when the UE sends a "Rout Area Update" message to other non-AP networks, such as a radio access network composed of RNC and NODEB, it can carry the ground RAI. The SGSN in the core network can find the corresponding AG by searching the 3G paging table according to the ground RAI (the table is configured with the correspondence between the ground RAI and the AG); the AG then pages through the corresponding relationship established with the AP. The original AP, thus completing the process of direct signaling connection re-establishment.

1 is a flowchart of Embodiment 1 of a method for updating a routing area identifier according to the present invention. This embodiment is directed to a processing flow of an AP side in the first application environment. As shown in FIG. 1, the method includes:

Step 100: The AP constructs a first routing area identifier update message that includes the ground routing area identifier. After the UE successfully establishes the PS service, the AP may initiate the measurement of the different system, for example, the measurement process of the GPRS network, and the AP receives the switching algorithm, for example, the AP. The 3A event report reported to the UE determines that the UE will initiate a handover to the GPRS neighboring cell. Then, the AP actively constructs a first routing area identifier update message, and includes, in the first routing area identifier update message, a ground RAI that is consistent with that maintained by the CN side.

Step 101: The AP sends a first routing area identifier update message including a ground RAI to the UE, where the first routing area identifier update message is used to instruct the UE to update the stored air interface RAI to the ground RAI.

The AP sends a first routing area identifier update message to the UE, and carries the ground RAI in the first routing area identifier update message, indicating that the ground RAI carried by the UE application message replaces the originally stored air interface RAI, so as to ensure that the subsequent UE can successfully succeed. Switch to the GPRS cell. The ground RAI described above allocates a unified RAI for multiple APs on the CN side, and each AP is assigned an AG under the AG to be an air interface RAI when opening an account. After the UE replaces the stored RAI with the ground RAI and then sends a cell handover request to the GPRS cell, the UE can carry the uplink RAI in the request message, and the CN side can successfully find the original AP to complete the cell handover process. The first routing area identifier update message sent by the AP to the UE may be redundant based on the packet temporary mobile subscriber identity reallocation indication message defined in the 3GPP protocol, that is, the "P-TMSI reallocation procedure", that is, the AP sends the "P" to the UE. a TMSI reallocation command message, and carrying the ground RAI information in the message. According to the protocol, after receiving the message, the UE applies the information in the message to replace the information stored by the UE to implement the RAI information. replace. The AP also carries a Packet Temporary Mobile Subscriber Identification (P-TMSI) in the "P-TMSI reallocation command", and the P-TMSI is the same as the P-TMSI allocated by the CN to the UE.

Step 102: The AP sends a handover indication message for performing cell handover to the UE, where the handover indication message includes target cell information, so that the UE requests handover from the target cell by using the ground RAI.

After receiving the update of the information about the completion of the first routing area identifier update message sent by the AP, the UE may return an update success response message to the AP, indicating that the RAI information has been updated successfully. After receiving the update success response message returned by the UE, the AP sends a handover indication message for performing cell handover, for example, a "Cell Change order from UTRAN" message, where the handover indication message includes target cell information, so that the UE uses the ground routing area identifier to target The cell requests handover, that is, initiates a handover procedure to the GPRS cell; wherein the target cell information mainly describes a specific access technology (such as GSM) of the target cell. For the target cell is a GPRS cell, the information includes a Base Station Identity Code (BSIC), a Band Indicator, and a Broadcast Control Number (BCCH ARFCN). "BCCH ARFCN" is used to indicate the frequency of the broadcast channel of the target cell. "Band Indicator" is used to indicate how to correctly interpret "BCCH ARFCN". The BSIC enables the mobile station to distinguish between cells transmitting the calibration channel with the same frequency. The UE can correctly identify the target cell through this information.

Certainly, in this embodiment, after receiving the update of the first routing area identifier update message completion information sent by the AP, the UE may not return a success response message, and the AP does not receive the success response message after a delay of a period of time. In case, it can be considered that the RAI information of the UE has been updated to For the function, a handover indication message for performing cell handover is sent. In this embodiment, the AP updates the air interface RAI to the ground RAI by the UE, so as to improve the success rate of the UE from the 3G network to the 2G network, and improve the service quality of the service.

In another embodiment of the present invention, if the UE fails to perform handover to the GPRS cell in the embodiment shown in FIG. 1, a failure response message, such as a "Cell Change order from UTRAN Failure" message, is sent to the AP; the AP receives the UE return. After performing the cell handover failure response message, the second routing area identifier update message is sent to the UE, where the second routing area identifier update message is used to instruct the UE to update the stored ground RAI to the air interface RAI, that is, if If the handover fails, the AP instructs the UE to restore the stored RAI information to the original air interface RAL through the second routing area identifier update message.

In addition, in the compatibility test, after the UE's air interface RAI information is changed to the ground RAI information, the behavior of the UE re-establishing a new service in the AP cell after the normal release of the AP cell is inconsistent. Since the system message broadcast of the AP cell uses the air interface RAI, some UEs will initiate a re-registration process when the AP cell re-establishes a new service, and then establish a new service, and some UEs do not re-register or To establish a new business, you can only register and establish a new business by rebooting. In order to avoid the above problem, the embodiment further includes the UE changing the RAI information back to the air interface RAI information before the RRC link of the AP cell is released. The specific implementation manner may also be that the foregoing AP sends the second routing area identifier update to the UE. The message is implemented.

Of course, in this embodiment, the sending of the first routing area identifier update message to the UE by the AP may be performed after the AP performs the heterogeneous system measurement process, that is, the RAI information of the UE is updated first, and then the GPRS is performed. Whether the measurement decision of the cell needs to be switched to the GPRS cell; if the cell handover is not required, the RAI information may be restored to the air interface RAI through the second routing area identifier update message. The second routing area identifier update message may also be a "P-TMSI real location command" message, and the P-TMSI information carried in the same manner is the same as the P-TMSI allocated by the CN to the UE.

The method for updating the routing area identifier provided by the embodiment, where the AP sends the routing area identifier to the UE. The new message enables the UE to update the air interface RAI to the ground RAI to improve the success rate of the UE switching from the 3G network to the 2G network, and improve the service quality of the service.

2 is a flowchart of Embodiment 2 of a method for updating a routing area identifier according to the present invention. This embodiment is directed to a processing flow of a UE side in the first application environment. As shown in FIG. 2, the method includes:

Step 200: Receive a first routing area identifier update message sent by the access point device, where the first routing area identifier update message carries a ground routing area identifier.

After the UE successfully establishes the PS service in the AP cell, the AP may send the first routing area identifier update message to the UE before or after the measurement process of the GPRS network is started, in order to ensure that the UE successfully switches to the 2G. The first routing area identifier update message carries a ground RAI, and indicates that the ground RAI carried by the UE application message replaces the originally stored air interface RAI. After the UE replaces the RAI stored in the ground with the ground RAI, and then sends a cell handover request to the GPRS cell, the UE can carry the uplink RAI in the request message, and the CN side can successfully find the original AP to complete the cell switching process.

The first routing area identifier update message sent by the AP to the UE may be completed based on the "P-TMSI reallocation procedure" defined in the 3GPP protocol, that is, the AP sends a "P-TMSI reallocation command" message to the UE, and the message is The ground carries the ground RAI information, and the P-TMSI information carried in the same is the same as the P-TMSI allocated by the CN to the UE.

Step 201: Change, according to the first routing area identifier update message, the stored air interface routing area identifier to the ground routing area identifier.

After receiving the first routing area identifier update message, the UE applies the information in the message to replace the original stored information, and then the stored air interface RAI information is modified into the ground RAI information to implement the replacement of the RAI information.

Step 202: Receive an indication message that is sent by the access point device to indicate that a cell handover is performed, where the handover indication message includes target cell information.

After receiving the update of the RAI information by the first routing area identifier update message sent by the AP, the UE may return an update success response message to the AP, indicating that the RAI information has been updated successfully; The update success response message may not be returned. After the delay of the AP, if the AP does not receive the update success response message, the AP considers that the UE has successfully updated. After receiving the update success response message returned by the UE or after waiting for the delay, the AP sends a handover indication message for performing cell handover, for example, a "Cell Change order from UTRAN" message, where the handover indication message includes the target cell information. The UE receives the handover indication message.

Step 203: Send a cell access request message to the target cell information, where the cell access request message carries the ground routing area identifier.

After receiving the handover indication message sent by the UE, the UE sends a cell access request message, such as a routing area update request message, to the target cell corresponding to the target cell information, for example, the GPRS cell, and carries the ground RAI information in the request message. Specifically, the UE sends a "Routing Area Update Request" message to the SGSN shared by the 3G and the GPRS network and carries the ground RAI. After receiving the ground RAI, the SGSN searches for the 3G paging table including the correspondence between the ground RAI and the AG according to the ground RAI. After the corresponding AG is found, the "SRNS Context Request" message is sent to the AG; the AG forwards the "SRNS Context Request" message to the original AP where the UE is located through the previous association with the AP, thereby finally completing the UE switching from the AP cell. The process to the GPRS cell.

In this embodiment, the UE completes the air interface RAI update to the ground RAI according to the indication of the AP, and requests the cell handover according to the ground RAI, thereby improving the success rate of the UE switching from the 3G network to the 2G network, and improving the service quality of the service.

In another embodiment of the present invention, if the UE fails to perform handover to the GPRS cell in the implementation shown in FIG. 2, a failure response message, such as a "Cell Change order from UTRAN Failure" message, is sent to the AP; After the failure response message of the cell handover is performed, the second routing area identifier update message including the air interface RAI is sent to the UE, where the second routing area identifier update message is used to instruct the UE to update the stored ground RAI to the air interface RAI, that is, if the handover is performed. If the AP fails, the AP instructs the UE to restore the stored RAI information to the original air interface RAI through the second routing area identifier update message. After receiving the second routing area identifier update message, the UE replaces the ground RAI information by using the air interface RAI information, and returns an update success response message to the AP. In addition, in order to avoid the problem that occurs after the UE is in the normal state of the AP RAI, the embodiment further includes the UE changing the RAI information back to the air interface RAI information before the RRC link of the AP cell is released. The method may also be implemented by the foregoing AP sending a second routing area identifier update message to the UE.

In the routing area identifier update method provided by the embodiment, the UE updates the air interface RAI to the ground RAI through the routing area identifier update message sent by the AP, and requests the cell handover according to the ground RAI, thereby improving the UE from the 3G network to the 2G network. The success rate of handover improves the quality of service.

FIG. 3 is a signaling flowchart of a UE switching from a 3G network to a GRPS cell according to an embodiment of the present invention. As shown in FIG. 3, the process includes:

Step la, the UE successfully establishes a PS service in the AP cell;

Step 2a, the AP starts the heterogeneous system measurement process;

Step 3a: The AP according to the different system switching algorithm, for example, the AP receives the 3A event report reported by the UE, and the AP determines that the UE initiates a handover process to the target GRPS cell;

Step 4a, the AP constructs a NAS message, that is, a "P-TMSI Reallocation Command" message, and then sends the message to the UE, where the message carries the ground RAI information;

In the message, the P-TMSI is the same as the P-TMSI allocated by the CN to the UE, and the RAI information is filled in as the ground RAI, that is, the RAI information of the AP cell saved by the CN side; "P-TMSI signature" is an optional cell. You can leave the cell blank. After receiving the message, the UE will replace the new P-TMSI and terrestrial RAI information carried in the message, and complete the modification of the RAI information stored by the UE.

It should be noted that this step may also be performed after the step la and before the step 2a.

Step 5a: The UE sends a "P-TMSI Reallocation Complete" message to the AP; Step 6a, after receiving the message, the AP sends a "Cell Change order from UTRAN" message to the UE;

Step 7a: The UE sends a "Routeing Area Update Request" message to the SGSN. After receiving the "Cell Change order from UTRAN" message, the UE specifies the message according to the message.

The GPRS cell initiates a connection process. In this embodiment, an SGSN shared by 2G and 3G is taken as an example. The UE will send a "Routeing Area Update Request" message to the 2G and 3G shared SGSN, which carries the ground RAI information.

Step 8a: The SGSN sends an "SRNS Context Request" message to the AP to the AP.

After receiving the "Routeing Area Update Request" message, the SGSN searches the 3G paging table according to the ground RAI information, which configures the correspondence between the ground RAI and the AG. After finding the corresponding ground RAI information, the SGSN sends an "SRNS Context Request" message to the associated AG. The AG finds the original AP where the UE is located according to the previous relationship with the AP in the PS service, and forwards the "SRNS Context Request" message to the AP.

Step 9a: The AP sends an "SRNS Context Response" message to the SGSN through the AG. After receiving the "SRNS Context Request" message, the AP caches and stops sending data to the UE, and responds to the "SRNS Context Response" message.

Step 10a: The SGSN sends an "SRNS Data Forward Command" message to the AP through the AG.

The SGSN sends an "SRNS Data Forward Command" message to the AG. The AG forwards the "SRNS Data Forward Command" message to the AP, notifying the AP that the AG is ready to receive the data packet. After receiving the message, the AP starts the "data-forwarding" timer.

Step 11a: The SGSN sends an "Iu Release Command" message to the AP through the AG. In step 12a, after the "data-forwarding" timer initiated by the AP times out, the AG sends an "Iu Release Complete" message to the SGSN. At this point, the handover process between the PS service systems on the AP side ends.

In the process shown in FIG. 3, the triggering time of the UE RAI information changed by the AP through the "P-TMSI Reallocation" process may also be that after the PS service is successfully established, the AP sends a "P-TMSI Reallocation Command" message to the UE. That is, the step 4a and the step 5a in the above process may be performed before the step 2a, and the other steps are the same as those shown in FIG. 3 and will not be described again.

4 is a signaling diagram of a handover failure processing flow between PS service systems according to the present invention. As shown in FIG. 4, the process includes: Step lb, the UE successfully establishes a PS service in the AP cell;

Step 2b, the AP starts the heterogeneous system measurement process;

Step 3b: The AP according to the different system switching algorithm, for example, the AP receives the 3A event report reported by the UE, and the AP determines that the UE initiates a handover process to the target GRPS cell;

Step 4b, the AP constructs a NAS message "P-TMSI Reallocation Command" message, and then sends the message to the UE, where the message carries the ground RAI information;

The P-TMSI in the message is the same as the P-TMSI allocated to the UE by the CN, and the RAI information is filled in as the ground RAI, that is, the RAI information of the AP cell saved by the CN side; "P-TMSI signature" is an optional cell. , you can not fill in the cell. After receiving the message, the UE replaces the new P-TMSI and terrestrial RAI information carried by the message, and completes the modification of the RAI information stored by the UE.

Step 5b: The UE sends a "P-TMSI Reallocation Complete" message to the AP; Step 6b, after receiving the message, the AP sends a "Cell Change order from UTRAN" message to the UE;

Step 7b, the UE fails to reselect the GPRS cell, and reports to the AP "Cell Change Order From

Utran Failure" message; Step 8b, the AP sends a "P-TMSI Reallocation Command" message to the UE, carrying the air interface RAI information;

After receiving the "Cell Change Order From Utran Failure" message reported by the UE, the AP sends a "P-TMSI Reallocation Command" message to the UE, where the P-TMSI is the same as the P-TMSI allocated to the UE by the CN, RAI The RAI in which the information is filled in as an air interface is the RAI information originally saved by the UE, and "P-TMSI signature" will not be filled in because it is an optional cell.

In step 9b, the UE sends a "P-TMSI Reallocation Complete" message to the AP.

After receiving the "P-TMSI Reallocation Command" message carrying the air interface RAI information, the UE will replace the new P-TMSI and the RAI information carried in the message, so that the RAI information stored by the UE is restored to the air interface RAI information. . FIG. 5 is a signaling diagram of a service release process in the cell that is not switched to the GPRS network after the PS service is established according to the present invention. The process flow is mainly for the PS service undirected GPRS network or the tangential GPRS network failure service is still maintained in the AP. The cell, finally in the normal release of the AP cell, as shown in Figure 5, the process includes:

Step lc, the UE successfully establishes a PS service in the AP cell;

Step 2c, the AP constructs a NAS message "P-TMSI Reallocation Command" message, and then sends the message to the UE, where the message carries the ground RAI information;

In step 3c, the UE reports a "P-TMSI Reallocation Complete" message to the AP; in step 4c, the PS service is normally released in the AP cell;

In this case, to ensure that the released UE should store the RAI information of the AP air interface, the P-TMSI Reallocation procedure is initiated to the UE before the RRC link is released, so that the RAI information of the UE is restored to the RAI information of the AP air interface. .

Step 5c: The AP sends a P-TMSI Reallocation Command message to the UE, and carries the air interface RAI information.

The AP sends a "P-TMSI Reallocation Command" message to the UE, where the P-TMSI is the same as the P-TMSI allocated to the UE by the CN, and the RAI information filled in by the RAI information is the RAI information originally saved by the UE, "P- TMSI signature "Because it is an optional cell, the cell will not be filled out.

Step 6c: The UE reports a "P-TMSI Reallocation Complete" message to the AP.

After receiving the "P-TMSI Reallocation Command" message, the UE will replace the new P-TMSI and RAI information carried by the message and return the "P-TMSI Reallocation Complete" message.

Step 7c: After receiving the "P-TMSI Reallocation Complete" message reported by the UE, the AP releases the RRC connection. In the above embodiments, the "P-TMSI reallocation procedure" defined in the 3GPP protocol is used to solve the technical problem that the UE fails to switch from the AP cell to the 2G network. Specifically, in the RRC connected state, the AP initiates the initiative to the UE. "P-TMSI reallocation Command" message, where the message carries the ground RAI information, and the P-TMSI remains unchanged, so that after receiving the message, the UE changes its air interface RAI information and stores it as ground RAI information, so that when the UE When the AP cell cuts into the GPRS cell, the UE has carried the ground RAI information. In the "Routing Area Update Request" message initiated by the UE to the GPRS cell, the RAI is already the ground RAI information, so that the original AP can be paged, thereby successfully completing the process of the UE switching from the AP cell to the GPRS cell, thereby improving the process. PS business service quality.

FIG. 6 is a flowchart of Embodiment 3 of a method for updating a routing area identifier according to the present invention. This embodiment is a processing flow for the second application environment. As shown in FIG. 6, the method includes:

Step Id, the AP triggers the DSCR process, and constructs a first routing area identifier update message including a ground RAI, such as a "P-TMSI REALLOCATION COMMAND" message, where the "P-TMSI REALLOCATION COMMAND" is used to instruct the UE to update the stored air interface RAI. For ground RAI;

In step 2d, the AP sends a "P-TMSI REALLOCATION COMMAND" including the ground RAI to the UE;

In step 3d, the UE returns a "P-TMSI REALLOCATION COMMAND COMPLETE" message to the AP, indicating that the update is successful;

Step 4d: Send, to the UE, a radio resource connection release message carrying a reason value of DSCR.

"RRC CONNECTION RELEASE" message;

Step 5d, the UE sends an "RRC CONNECTION RELEASE COMPLETE" message to the AP;

Step 6d: The UE establishes an RRC connection process with the RNC.

Step 7d, the UE sends a routing area update message, that is, a "ROUTE ARER UPDATE" message to the RNC, which carries the ground RAI; In step 8d, the RNC forwards the "ROUTE ARER UPDATE" message to the SGSN. In step 9d, the SGSN requests the AP to forward the data, and then the AP forwards the data packet to the SGSN. In step 10d, the SGSN sends a routing area update accept message to the RNC, that is, "ROUTE ARER". UPDATE ACCEPT"message;

Step l id, the RNC sends a message "ROUTE ARER UPDATE ACCEPT" to the UE; in step 12d, the UE sends a routing area update completion message to the RNC, that is, a "ROUTE ARER UPDATE COMPLETE" message;

In step 13d, the RNC sends a ROUTE ARER UPDATE COMPLETE message to the SGSN;

Step 14d, the establishment process of the radio access bearer (Radio Access Bearer; hereinafter referred to as RAB). In the foregoing embodiment, the UE can successfully perform service access again, and the timing of the initiation of steps 2 and 3 may also be after the UE successfully establishes the service (before step 1 in the figure). In addition, the DSCR process involved in this embodiment may be a case where only non-real-time PS services exist in the UE.

In the routing area identifier update method provided by the present embodiment, before performing the DSCR process, the AP instructs the UE to update the air interface RAI to the ground RAI to ensure the smooth progress of the subsequent routing area update process, improve the success rate of the DSCR process, and improve the service quality of the service.

In the above embodiments, the RAI is carried by the "P-TMSI reallocation command" message. The following describes in detail how to use the "P-TMSI reallocation command" message to carry the ground RAI. As shown in Table 1, the location of the corresponding cell field in the "P-TMSI REALLOCATION COMMAND" message, the embodiment of the present invention can carry the ground RAI information through the "Routing area identification" cell in the table. In addition, the content of the "P-TMSI" cell is the same as the P-TMSI assigned by the CN to the UE.

Table 1

Cell number of bytes

Protocol discriminator Skip indicator 1 P-TMSI reallocation command message identity 1

P-TMSI 6

Routing area identification 6

Force to standby Spare half octet 1 It will be understood by those skilled in the art that all or part of the steps of implementing the foregoing method embodiments may be performed by hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium. When the program is executed, the steps including the foregoing method embodiments are performed; and the foregoing storage medium includes: a ROM, a RAM, a magnetic disk or an optical disk, and the like, which can store various program codes.

FIG. 7 is a schematic structural diagram of Embodiment 1 of an access point device according to the present invention. As shown in FIG. 7, the access point device, that is, the AP, includes a building module 11 and a first sending module 12, where the building module 11 is configured to construct a ground RAI. The first routing area identifies an update message; the first sending module 12 is configured to send a first routing area identifier update message to the UE, so that the UE replaces the locally saved air interface RAI with the ground RAI.

Specifically, the AP provided by this embodiment constructs a routing area identifier update message, for example, a "P-TMSI reallocation command" message, where the ground RAI is carried by the building module 11; the building module 11 constructs a successful "P-TMSI reallocation command". After the message, the first sending module 12 sends the constructed message to the UE, so that the UE completes the updating of the stored air interface RAI to the ground RAI before performing the cell handover process or the AP performing the DSCR process, so as to ensure the smooth progress of the subsequent process. .

The AP provided in this embodiment can improve the service quality of the service by constructing a routing area identifier update message that causes the UE to update the air interface RAI to the ground RAI to avoid the subsequent inconsistency of the RAI maintained by the UE and the network side.

FIG. 8 is a schematic structural diagram of Embodiment 2 of an access point device according to the present invention. As shown in FIG. 8, the AP in this embodiment also includes a building module 11 and a first sending module 12, and further, a first sending module. 12 includes any one of the following submodules or a combination thereof:

The first sending submodule 121 is configured to send, after the service is established, the first floor including the ground RAI to the UE. a routing area identifier update message;

The second sending sub-module 122 is configured to send, after determining that the UE performs cell handover, a first routing area identifier update message including a ground RAI to the UE;

The third sending sub-module 123 is configured to send, to the UE, a first routing area identifier update message including the ground RAI before sending the RRC connection release message carrying the cause value to the DSCR.

The three sub-modules are respectively applicable to different application scenarios. For details, refer to the foregoing embodiments of the routing area identifier update method, and details are not described herein again.

The first sending module 12 in the AP provided by the embodiment is further configured to send a second routing area including the air interface RAI to the UE before releasing the radio resource control link or after receiving the failure response message of the cell handover returned by the UE. And identifying an update message, where the second routing area identifier update message is used to instruct the UE to update the stored ground RAI to an air interface RAI. The AP may also update the RAI information stored by the UE back to the air interface by the first sending module 12 in the failure of the cell handover.

The access point device provided by this embodiment provides the AP to update the RAI information, and the specific implementation process of improving the success rate of the UE from the 3G network to the 2G network, and the DSCR process can refer to the foregoing routing area identifier updating method. The embodiment is not described here. The AP sends the routing area identifier update message to the UE to update the air interface RAI to the ground RAI, so as to improve the success rate of the UE from the 3G network to the 2G network and the success rate of the DSCR process, and improve the service quality of the service.

FIG. 9 is a schematic structural diagram of an embodiment of a user equipment according to the present invention. As shown in FIG. 9, the user equipment includes a first receiving module 21, a first processing module 22, a second receiving module 23, and a second sending module 24, where the first receiving The module 21 is configured to receive a first routing area identifier update message sent by the access point device, where the first routing area identifier is used to update the ground routing area identifier, and the first processing module 22 is configured to use the first routing area identifier according to the first routing area identifier. The update message modifies the stored air interface routing area identifier to the ground routing area identifier; the second receiving module 23 is configured to receive an indication message that is sent by the access point device to indicate that the cell handover is performed, where the handover indication message includes Target cell information; the second sending module 24 is configured to send a cell access request message to the target cell, where the cell access request message carries The ground routing area identifier.

Specifically, after the UE successfully establishes the PS service, the AP may send the first routing area identifier update message to the UE before or after the measurement process of the GPRS network is started, for example, to ensure that the UE successfully switches to the 2G. a "P-TMSI reallocation Command" message, and carrying a terrestrial RAI, and P-TMSI information in the "P-TMSI reallocation Command" message, the P-TMSI information being the same as the P-TMSI allocated by the CN to the UE to indicate The ground RAI carried by the UE application message replaces the originally stored air interface RAI. After the first receiving module 21 in the UE receives the message, the first processing module 22 replaces the information stored in the message with the information in the message to replace the RAI information. After the replacement, the first processing module 22 may return an update success response message to the AP, indicating that the RAI information has been updated successfully, or may not return an update success response message, and if the AP does not receive the update success response message after a delay period, The authenticated UE has been updated successfully. After receiving the update success response message returned by the UE or after waiting for the delay of one end, the AP sends a handover indication message for performing cell handover, for example, a "Cell Change order from UTRAN" message, and the handover indication message includes the target cell information. The second receiving module 23 in the UE receives the handover indication message, and then sends a cell access request message, such as a "Routing Area Update Request" message, to the target cell corresponding to the target cell information, for example, by the second sending module 24. The message carries the ground RAI information.

The UE provided in this embodiment may further include a third sending module 25, where a failure occurs when the UE performs handover to the GPRS cell, and after receiving a failure response message, such as a "Cell Change order from UTRAN Failure" message, the AP receives the UE. After the failed response message of the cell handover is performed, the second routing area identifier update message including the air interface RAI is sent to the UE, and the second routing area identifier update message may also be a “P-TMSI real location Command” message and used to indicate that the UE will The stored ground RAI is updated to an air interface RAI. After receiving the second routing area identifier update message, the third sending module 25 in the UE applies the air interface RAI information to replace the ground RAI information, and returns an update success response message to the AP. In addition, in order to avoid the problem that occurs after the AP RIA is normally released after the UE maintains the ground RAI, the third sending module 25 is further used for the RRC link in the local AP cell. Before the release, the second routing area identifier update message including the air interface RAI sent by the AP is received, and the RAI information is changed back to the air interface RAI information.

The UE provides the routing area identifier update message sent by the AP, and updates the air interface RAI to the ground RAI, and requests the cell handover according to the ground RAI, which can improve the success rate of the UE switching from the 3G network to the 2G network. Improve the quality of business services.

10 is a schematic structural diagram of an embodiment of a network system according to the present invention. As shown in FIG. 10, the network system includes an access point device, that is, an API and a user equipment, that is, UE2, where the API is used to construct a first routing area identifier update message including a ground RAI. And sending the first routing area identifier update message to the UE2, so that the UE2 replaces the locally saved air interface RAI with the ground RAI; the UE2 is configured to replace the stored air interface RAI with the ground RAI according to the first routing area identifier update message sent by the API. .

The APs and UEs involved in the network system provided in this embodiment may use the APs and UEs provided in the foregoing embodiments. The specific structure is not described here. In the network system provided by the embodiment, the AP sends a routing area identifier update message to the UE based on the existing protocol, so that the UE updates the air interface RAI to the ground RAI, and performs the cell handover process or the DSCR process based on the ground RAI to ensure the service success. Rate, improve the quality of business services.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A method for updating a routing area identifier, comprising:

The method for updating the routing area identifier according to claim 1, wherein the sending, by the access network device, the first routing area identifier update message to the user equipment comprises:

After the service is established, the access network device sends a first routing area identifier update message including the ground routing area identifier to the user equipment; or

After the access network device determines that the user equipment is to perform cell handover, the user equipment sends a first routing area identifier update message including a ground routing area identifier to the user equipment.

The routing area identifier updating method according to claim 1 or 2, wherein, after the access network device sends the first routing area identifier update message to the user equipment, the method further includes: the access network The device sends a handover indication message for performing cell handover to the user equipment, where the handover indication message includes target cell information, so that the user equipment requests handover to the target cell by using the ground routing area identifier.

The routing area identifier updating method according to claim 3, wherein the sending network device sends a handover indication message for performing d and area handover to the user equipment, where:

After receiving the update success response message returned by the user equipment, the handover indication message is sent to the user equipment.

The method for updating a routing area identifier according to claim 3, wherein the method further comprises: before releasing the radio resource control link or receiving a failure response message for performing cell handover returned by the user equipment. And sending, to the user equipment, a second routing area identifier update message that includes an air interface routing area identifier, where the second routing area identifier update message is used to instruct the user equipment to update the stored ground routing area identifier to the Air interface routing area identifier.

The routing area identifier updating method according to claim 5, wherein the first routing area identifier update message and the second routing area identifier update message are group temporary mobile user labels Recognize the assignment indication message.

And sending, by the access network device, the first routing area identifier update message including the ground routing area identifier to the user equipment, before sending the radio resource connection release message with the cause value being the direct signaling connection reestablishment to the user equipment.

The method for updating a routing area identifier according to claim 1 or 7, wherein the first routing area identifier update message is a packet temporary mobile user identity reallocation indication message.

A method for updating a routing area identifier, comprising:

The method for updating the routing area identifier according to claim 9, wherein, after receiving the first routing area identifier update message, the method further includes:

Receiving, by the user equipment, a handover indication message that is sent by the access network device to perform cell handover, where the handover indication message includes target cell information;

The user equipment requests handover to the target cell by using the ground routing area identifier.

The routing area identifier updating method according to claim 9, wherein after the user equipment replaces the locally saved air interface routing area identifier by using the ground routing area identifier, the method further includes:

Receiving, by the access network device, a second routing area identifier update message that includes an air interface routing area identifier, where the second routing area identifier update message is sent before the release of the radio resource control link or received by the user equipment Sent after the failure response message of the cell handover;

The user equipment updates the stored ground routing area identifier to the air interface routing area identifier.

12. An access point device, comprising:

a building module, configured to construct a first routing area identifier update message including a ground routing area identifier; The first sending module is configured to send the first routing area identifier update message to the user equipment, so that the user equipment replaces the locally saved air interface routing area identifier by using the ground routing area identifier.

The access point device according to claim 12, wherein the first sending module comprises at least one submodule:

a first sending submodule, configured to send, to the user equipment, a first routing area identifier update message including a ground routing area identifier after the service is established;

a second sending submodule, configured to send, to the user equipment, a first routing area identifier update message including a ground routing area identifier, after determining that the user equipment is to perform cell switching;

a third sending submodule, configured to send, to the user equipment, a first routing area identifier update message including a ground routing area identifier, before sending, to the user equipment, a radio resource connection release message carrying a cause value of the direct signaling connection reestablishment .

The access point device according to claim 13, wherein the first sending module is further configured to: before releasing the radio resource control link or receiving a failure response of the cell handover returned by the user equipment Sending, to the user equipment, a second routing area identifier update message that includes an air interface routing area identifier, where the second routing area identifier update message is used to instruct the user equipment to update the stored ground routing area identifier to The air route routing area identifier.

15. A user equipment, comprising:

a first receiving module, configured to receive a first routing area identifier update message sent by the access point device, where the first routing area identifier update message carries a ground routing area identifier;

The first processing module is configured to replace the stored air interface routing area identifier with the ground routing area identifier according to the first routing area identifier update message.

The user equipment according to claim 15, further comprising: a second receiving module, configured to receive an indication message sent by the access point device to indicate performing cell handover, where the handover indication message is Including target cell information;

And a second sending module, configured to send a cell access request message to the target cell, where the cell access request message carries the ground routing area identifier.

The user equipment according to claim 15, further comprising: a third sending module, configured to send a handover failure response message to the access point device, and receive a second routing area identifier update message that is sent by the access point device, including the air interface routing area identifier, and apply the air interface routing area identifier to replace The ground routing area identifies and returns an update success response message to the access point device.

A network system, comprising: the access point device according to any one of claims 12 to 14 and the user equipment according to any one of claims 15 to 17.