CN115103347B

CN115103347B - Tracking area updating method, device, electronic equipment and computer readable storage medium

Info

Publication number: CN115103347B
Application number: CN202210640117.0A
Authority: CN
Inventors: 罗强
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2024-05-14
Anticipated expiration: 2042-06-08
Also published as: CN115103347A

Abstract

The application relates to a tracking area updating method, a tracking area updating device, electronic equipment and a computer readable storage medium. The method comprises the following steps: in the process of performing TAU by the UE, if cell switching occurs, judging whether the tracking area of the target cell is consistent with the tracking area of the source cell; and if the tracking area of the target cell is consistent with the tracking area of the source cell, sending a first tracking area updating request to the MME. The content of the first tracking area update request is the same as the content of the second tracking area update request, and the second tracking area update request is sent when the UE triggers TAU. The method can improve the updating efficiency of the tracking area and the success rate of the called party.

Description

Tracking area updating method, device, electronic equipment and computer readable storage medium

Technical Field

The present application relates to the field of communications, and in particular, to a tracking area updating method, apparatus, electronic device, and computer readable storage medium.

Background

When the location of a User Equipment (UE) is switched from an old cell to a new cell, and the tracking area information of the new cell is inconsistent with the information in the tracking area list of the old cell, the UE sends a tracking area Update Request (TRACKING AREA Update Request) to a Mobility management entity (Mobility MANAGEMENT ENTITY, MME), and the tracking area Update process is completed through an MME. In the tracking area Update (TRACKING AREA Update, TAU) process, if a handover occurs between base stations, TAU failure may be caused, so that the UE may not receive a paging message or a CS SERVICE Notification message sent by the core network.

In the related art, in the process of performing TAU by the MME, if a handover occurs between base stations and the UE does not receive a tracking area update request sent by the MME, the MME can only wait for a period of time (6S) and then retransmit a tracking area update message in the target cell, or the UE needs to wait for a longer time (25S) and then resend the TAU to the mobility management entity.

However, the related art method results in a low tracking area update efficiency.

Disclosure of Invention

The embodiment of the application provides a tracking area updating method, a device, electronic equipment and a computer readable storage medium, which can improve the updating efficiency of a tracking area.

A tracking area updating method, the method comprising:

In the process of performing TAU by the UE, if cell switching occurs, judging whether the tracking area of the target cell is consistent with the tracking area of the source cell;

If the tracking area of the target cell is consistent with the tracking area of the source cell, a first tracking area updating request is sent to the MME; the content of the first tracking area update request is the same as the content of the second tracking area update request, which is sent when the UE triggers TAU.

A tracking area updating method, the method comprising:

Receiving a first tracking area update request and a second tracking area update request sent by UE; the first tracking area update request is sent after the UE generates cell switching in the TAU process, and the second tracking area update request is sent when the UE triggers the TAU;

and if the content of the first tracking area updating request is the same as the content of the second tracking area updating request, transmitting a tracking area updating message.

A tracking area updating apparatus, the apparatus comprising:

The first judging module is used for judging whether the tracking area of the target cell is consistent with the tracking area of the source cell or not if the cell switching occurs in the process of performing TAU by the UE;

A first sending module, configured to send a first tracking area update request to an MME, where a tracking area of the target cell is consistent with a tracking area of the source cell; the content of the first tracking area update request is the same as the content of a second tracking area update request, and the second tracking area update request is sent when the UE triggers TAU.

A tracking area updating apparatus, the apparatus comprising:

The third receiving module is used for receiving a first tracking area update request and a second tracking area update request sent by the UE; the first tracking area update request is sent after the UE generates cell switching in the process of TAU, and the second tracking area update request is sent when the UE triggers TAU;

and the third sending module is used for sending the tracking area update message if the content of the first tracking area update request is the same as the content of the second tracking area update request.

An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein the computer program, when executed by the processor, causes the processor to perform the steps of the tracking area updating method according to any of the above method embodiments.

A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any of the above method embodiments.

A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any of the above method embodiments.

In the tracking area updating method, the device, the electronic equipment and the computer readable storage medium, if cell switching occurs in the process of performing TAU by the UE, judging whether the tracking area of the target cell is consistent with the tracking area of the source cell; and if the tracking area of the target cell is consistent with the tracking area of the source cell, sending a first tracking area updating request to the MME. The content of the first tracking area update request is the same as the content of the second tracking area update request, and the second tracking area update request is sent when the UE triggers TAU. In the process, the UE does not need to wait for the tracking area update message sent by the MME, and can immediately resend the tracking area update request to the MME under the condition that the tracking areas of the source cell and the target cell are consistent.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a diagram of an application environment for a tracking area update method in one embodiment;

FIG. 2 is a flow chart of a tracking area update method in one embodiment;

FIG. 3 is a flow chart of a tracking area update method in one embodiment;

FIG. 4 is a flow diagram of an X2 handover process in one embodiment;

FIG. 5 is a flow chart of an S2 handover procedure in one embodiment;

fig. 6 is a flowchart of an MME sending a paging message to a UE in one embodiment;

Fig. 7 is a called flow chart of an MME initiating CSFB to a UE in one embodiment;

FIG. 8 is a flow chart of a loss of paging due to a TAU failure in one embodiment;

FIG. 9 is a flow diagram of a tracking area update method in one embodiment;

FIG. 10 is a flow diagram of a tracking area update method in one embodiment;

FIG. 11 is a flow diagram of a tracking area update method in one embodiment;

FIG. 12 is a flow diagram of a tracking area update method in one embodiment;

FIG. 13 is a flow diagram of a tracking area update method in one embodiment;

FIG. 14 is a flow diagram of a tracking area update method in one embodiment;

FIG. 15 is a flow diagram of a tracking area update method in one embodiment;

FIG. 16 is a flow diagram of a tracking area update method in one embodiment;

FIG. 17 is a flow diagram of a tracking area update method in one embodiment;

FIG. 18 is a block diagram of a tracking area update apparatus in one embodiment;

FIG. 19 is a block diagram of a tracking area update apparatus in one embodiment;

FIG. 20 is a block diagram of an electronic device in one embodiment;

FIG. 21 is a block diagram of an electronic device in one embodiment.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

The tracking area updating method provided by the embodiment of the application can be applied to an application environment shown in figure 1. The application environment includes a user equipment 100, a source base station 200, a target base station 300 and a mobility management entity 400, where the user equipment 100 communicates with the source base station 200 and the target base station 300 through a network, and the source base station 200, the target base station 300 and the mobility management entity 400 communicate with each other through the network. The user device 100 may be a wireless terminal, which may be a device that provides voice and/or other traffic data connectivity to a user, a handheld device with wireless connection capabilities, or other processing device connected to a wireless modem. The wireless terminals may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers with mobile terminals, which may be, for example, portable, pocket, hand-held, computer-built-in or car-mounted mobile devices which exchange voice and/or data with radio access networks. Such as Personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiation Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal DIGITAL ASSISTANT, PDA) and the like. The source base station 200 and the target base station 300 may be a base station (Base Transceiver Station, BTS) in global mobile communications (Global System of Mobile communication, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a base station (NodeB, NB) in wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), an evolved base station (Evolutional Node B, eNodeB) in LTE, a relay station or an access point, a base station in a 5G network, or the like, which is not limited herein.

First, before the technical scheme of the embodiment of the present application is specifically described, a description is first given of a technical background on which the embodiment of the present application is based.

Fig. 2 shows a schematic diagram of a tracking area update procedure, and in fig. 2, the tracking area update procedure may be represented as: the UE sends a tracking area update request to the MME, and after receiving the tracking area update request, the MME judges the tracking area update request and sends a tracking area update message or refuses the tracking area update message to the UE within a preset time (TRACKING AREA Update Request Reject). After receiving the tracking area update message sent by the MME, the UE sends a tracking area update completion message (TRACKING AREA Update Request Complete) to the MME, which indicates that the tracking area update process is completed; after receiving the tracking area update rejection message sent by the MME, the UE does not need to send a message to the MME, which indicates that the tracking area update process fails, and the UE needs to send a tracking area update request to the MME again to initiate the TAU process again.

In the prior art, when a UE is switched from a source cell to a target cell in the TAU procedure, an MME sends a tracking area update message to a source base station corresponding to the source cell, and forwards the tracking area update message to the UE through the source base station or forwards the tracking area update message to the target base station through the source base station, and forwards the tracking area update message to the UE through the target base station. Fig. 3 is a flowchart of a tracking area updating method in the prior art, in fig. 3, a UE enters an a cell in an idle state, and a tracking area (TRACKING AREA, TA) of the a cell is not in a tracking area list of a previous cell, the UE sends a tracking area updating request to an MME, when the UE confirms that a tracking area updating message is received, the UE does not send a tracking area updating completion to the MME, a base station initiates a handover, after a user equipment is handed over to a B cell, the UE sends a tracking area updating completion to the MME, and a tracking area updating procedure is completed. When the UE does not receive the tracking area update message, the base station initiates switching, the UE judges whether the tracking areas of the A cell and the B cell are consistent, and when the tracking areas of the A cell and the B cell are inconsistent, the UE reinitiates a TAU flow; when the tracking areas of the A cell and the B cell are consistent, the UE judges whether the B cell immediately receives the tracking area updating message, and when the B cell immediately receives the tracking area updating message, the UE sends the tracking area updating completion to the MME in the B cell. The process flow of branch a is entered next: when the cell B does not receive the tracking area update message immediately and receives the tracking area update message retransmitted by the MME after 6 seconds, the UE sends the tracking area update completion to the MME in the cell B. When the UE does not receive the tracking area update message within 6 seconds of the B cell, the UE needs to wait 25 seconds and then send a tracking area update request to the MME. Among the 25 seconds waiting for the UE, the UE needs to wait 15 seconds to determine whether to receive the tracking area update message sent by the MME, and if the UE does not receive the tracking area update message sent by the MME within 15 seconds, the UE also needs to wait 10 seconds to send a tracking area update request to the MME. The 25 seconds for the UE to wait and the 6 seconds for the MME to wait can be counted by a timer to ensure the accuracy of the waiting time. The process flow of branch B is entered next: and the MME confirms whether the tracking area update request is received or not, if so, the MME sends a tracking area update message to the UE, and the UE sends the completion of the tracking area update to the MME in the B cell. The process flow of branch C is entered next: if the MME confirms that the tracking area update request is not received, the MME sends a rejection tracking area update to the UE and carries a rejection reason, and the UE initiates a registration process. For example, the MME replies TRACKING AREA update reject, carrying a reject reason on TRACKING AREA update reject, which may be for example #10Implicitly detached. At this time, the UE side may cause call drop, and may need to reinitiate attach.

When the UE is switched from the source cell to the target cell, the UE sends a measurement report to the source base station, and after the source base station receives the measurement report sent by the UE, the UE is switched to the target base station, and the switching in the system in the long term evolution (Long Term Evolution, LTE) network comprises two switching modes, namely X2 switching and S1 switching.

Fig. 4 is a flowchart of an X2 handover procedure, where when a UE is in a connected state, the UE is handed over from one cell of a base station to a cell of another base station, and an X2 interface is present and configured between the two base stations. The basic idea of the X2 interface switching is as follows: when the source base station receives the measurement report of the UE, the source base station receives the measurement result reported by the UE, and then carries out switching judgment according to a self switching algorithm, and after the switching judgment, a switching Request (Handover Request) is sent to the target base station, and after the target base station receives the Handover Request, the target base station starts to carry out L1/L2 switching preparation, and meanwhile, a switching confirmation (Handover Request Ack) message is sent to the source base station. After receiving Handover Request Ack, the source base station issues a Handover Command (Handover Command) to the UE through a signaling Radio Resource Control (RRC) connection reconfiguration message (RRC Connection Reconfiguration), where the Handover Command carries an RRC connection reconfiguration message of mobility control information. The source base station sends a sequence number status transmission message (Sequence Number Status Transfer) to the target base station. The target base station sends a path switch Request message (PATH SWITCH Request) to the MME to inform the MME that the UE has changed cells, and the MME sends a path switch acknowledgement message (PATH SWITCH Request Ack) to the target base station to inform the target base station that the path switch is complete.

In the process of performing the X2 handover, the MME does not know that the UE is switching, and the MME normally processes the UE-initiated TAU procedure and sends a tracking area update message to the UE. When the UE initiates the TAU procedure before receiving the Handover Command and receives the Handover Command before the MME successfully sends the tracking area update message, the following problems exist:

(1) When the MME sends the tracking area update message to the source base station, after the source base station forwards the tracking area update message to the UE, the UE does not successfully receive the tracking area update message, the MME does not retransmit the HARQ and the RLC ARQ on the tracking area update message in the target cell, and the MME needs to wait for 6 seconds and then the target cell retransmits the tracking area update message;

(2) After the source base station sends the switching command, the source base station receives the tracking area updating message, if the source base station can forward the tracking area updating message to the target base station, the TAU flow can be normally performed. If the source base station can not forward the tracking area update message to the target base station, the MME can only wait for 6 seconds to timeout to retransmit the tracking area update message in the target cell;

(3) The MME sends a tracking area update message in the switching process, the tracking area update message cannot be retransmitted, and the UE can only reinitiate a tracking area update request after 25 seconds are overtime;

(4) In another case, the MME may not be able to process the tracking area update request sent by the UE after the timeout of T3411, and the MME considers that the TAU fails and has released the context of the UE, and the MME replies TRACKING AREA update reject carrying reason #10Implicitly detached,UE to reinitiate the attach according to the failure reason, resulting in the UE dropping the call in the call process. The reject causes may be #22, #28, #65, #67, or #90, # 91.

Fig. 5 is a flowchart of an S2 handover procedure, where when the UE is in a connected state, the UE is handed over from one cell of a base station to a cell of another base station, and an X2 interface is not configured between the two base stations. The basic idea of the S2 interface switching is as follows: after receiving a measurement report of the UE, the source base station receives the measurement result reported by the UE, performs switching judgment according to a self switching algorithm, sends a switching Request Handover Request to the MME after judging switching, and the MME forwards the Handover Request to the target base station, and starts L1/L2 switching preparation after receiving the Handover Request, and simultaneously sends a switching confirmation Handover Notify message to the MME. After receiving the Handover Notify, the MME sends a Handover Command to the source base station. The source base station issues a Handover Command to the UE via RRC Connection Reconfiguration messages. The UE sends Handover Complete message to the target base station via RRC Connection Reconfiguration Complete message.

In the process of performing S2 handover, the MME knows that the UE has cell handover in the TAU procedure, and the MME needs to perform handover negotiation with the target base station, where the TAU procedure initiated by the UE occurs in the NAS layer, and the S1 handover is that an S1 interface occurs, which has the following problems:

(1) After the switching of the S1 is completed, the MME sends a tracking area update message to the target base station, and the flow can be processed normally;

(2) MME sends the tracking area update message to the source base station, and because the source base station and the target base station have no X2 interface, the source base station cannot forward the tracking area update message to the target base station, and the MME needs to wait for 6 seconds to retransmit the tracking area update message to the target base station;

(3) The MME sends the tracking area update message to the source base station, and because the source base station and the target base station have no X2 interface, the source base station cannot forward the tracking area update message to the target base station, and meanwhile, the MME cannot resend the tracking area update message on the target cell, and the UE needs to wait 25 seconds and then initiate a tracking area update request to the MME again;

(4) In another case, the MME may not be able to process the tracking area update request sent by the UE after the timeout of T3411, and the MME considers that the TAU fails and has released the context of the UE, and the MME replies that the tracking area update is refused TRACKING AREA update reject carrying reason #10Implicitly detached,UE to reinitiate the attach according to the failure reason, resulting in the UE dropping the call in the call.

In the prior art, the UE does not receive the tracking area update message sent by the MME, the MME needs to wait 6 seconds to retransmit the tracking area update message to the target base station, or the UE needs to wait 25 seconds and then re-initiate the tracking area update request, which may cause the UE to fail to receive the idle paging or calling/called signaling sent by the network in a certain time (CS SERVICE noification).

Fig. 6 shows a flowchart of an MME sending a paging message to a UE, where when the UE is in an idle state, the MME may send paging to all base stations belonging to a TA registered by the UE, but because the UE does not successfully register a TA in a target base station, the target base station may not receive the paging, and the UE may lose the paging.

Fig. 7 shows a called flow chart of the MME initiating CSFB to the UE, when the UE is in a connected state, an external called request INITIAL ADDRESS MESSAGE is sent to a mobile services switching center (Master of Science, MSC) where a location area code (location area code, LAC) registered by the UE is located, and then the MSC sends to the corresponding MME. When the TAU procedure fails, it may cause a registration failure of a source cell corresponding to a tracking area code (TRACKING AREA code of CELL SERVED by neighbor Enb, TAC), a called request may be sent to an MSC of a TA corresponding to a previous TAC, and the MSC may find a previous MME, so that the UE may not receive CS SERVICE notification.

Fig. 8 is a flowchart of a paging loss caused by TAU failure, when the UE enters the branch a or the branch B in fig. 3, it is determined whether the network releases the UE, if the network releases the UE, and when the UE enters an idle state, the MME has sent a tracking area update message, but the UE does not receive the tracking area update message. In the above process, since the tracking area update of the UE is unsuccessful, any paging to the UE is sent to the last TA, and after the UE waits for 25 seconds, the UE resends the tracking area update request to the MME, and the UE cannot receive paging within 25 seconds. If the network does not release the UE and the new tracking area update has a new location area code, when the UE is in a connected state, and when the MME initiates a called party of CSFB to the UE, because the paging message is not registered in a new LAC of the MSC, the paging message will be sent to the previous tracking area, if the UE enters the branch a in fig. 3, after the MME needs to wait 6 seconds, the MME retransmits the tracking area update message in the target cell, and the UE cannot receive a call of the CS domain within 6 seconds. If the UE enters the branch B from the branch a in fig. 3, the UE re-initiates a new TAU after 25 seconds, and the UE cannot receive the CS domain call within 25 seconds.

In one embodiment, as shown in fig. 9, a tracking area updating method is provided, and the method is applied to the UE in fig. 1 for illustration, and includes the following steps:

S901, judging whether the tracking area of the target cell is consistent with the tracking area of the source cell or not if the cell switching occurs in the process of TAU by the UE.

The tracking area comprises a position area and a routing area, wherein the tracking area is an area for determining the position of the UE by the network, and when the UE is in an idle state, the network can know the TA where the UE is located; when a UE in an idle state is paged by the network, the network must page in all cells of the TA to which the UE is registered. The tracking area update refers to a process that when the UE enters a new cell, the TA of the cell is not in the TA already registered, and the UE needs to initiate TAU to the MME to register the TA of the new cell. The above cell switching means that the UE needs to complete the UE context switching and updating process through some signaling procedures due to the movement between different cells when the UE is in a connected state.

In the process of TAU, before the UE receives the tracking area update message sent by the MME, the cell switching occurs. For example, when the UE enters the a cell from the idle state, and the UE performs TAU on the a cell, the UE switches from the a cell to the B cell again without receiving the tracking area update message sent by the MME in the a cell, and needs to determine whether the tracking areas of the a cell and the B cell are consistent.

In the tracking area update process, the UE may send a tracking area update request to the base station, and forward the tracking area update request to the MME through the base station. The MME may determine a target cell for the tracking area update through the base station.

In this embodiment, during a TAU procedure performed by the UE, if a cell handover occurs, the UE sends measurement reports to the source base station and the target base station, and after the source base station and the target base station receive the measurement reports, the source base station and the target base station send system messages to the UE, respectively, where the UE may acquire a tracking area message of the source cell and tracking area information of the target cell from the system messages, and match the acquired tracking area message of the source cell with the tracking area information of the target cell, and if a similarity between the tracking area message of the source cell and the tracking area information of the target cell is greater than a preset threshold, determine that the tracking area of the target cell is consistent with the tracking area of the source cell; and if the similarity between the tracking area information of the source cell and the tracking area information of the target cell is smaller than or equal to a preset threshold value, determining that the tracking area of the target cell is inconsistent with the tracking area of the source cell.

S902, if the tracking area of the target cell is consistent with the tracking area of the source cell, a first tracking area updating request is sent to the MME; the content of the first tracking area update request is the same as the content of the second tracking area update request, which is sent when the UE triggers TAU.

In this embodiment, the tracking area update request carries the identification information of the cell before handover, and the source cell of the tracking area update can be determined by the identification information in the tracking area update request. The identification information may be location area identification information of the source cell, routing area identification information or keyword identification information of the source cell.

When the UE triggers TAU, the UE sends a tracking area update request to the MME, when the UE does not receive a tracking area update message corresponding to the tracking area update request, the UE is switched from a source cell to a target cell, and when the tracking areas of the source cell and the target cell are consistent, the UE sends the tracking area update request to the MME again. For example, when the UE enters the B cell from the a cell, the UE sends a tracking area update request to the MME in the B cell, and the UE does not receive a tracking area update message corresponding to the tracking area update request. When the UE is switched from the B cell to the C cell, and the tracking area information of the B cell and the tracking area information of the C cell are consistent, the UE sends a tracking area update request to the MME again. The UE does not need to wait for the MME to send the tracking area update message, and immediately sends the tracking area update request again, so that the waiting time of the UE side is reduced, and the tracking area update efficiency is improved.

In the tracking area updating method, if cell switching occurs in the process of performing TAU by the UE, whether the tracking area of the target cell is consistent with the tracking area of the source cell is judged; and if the tracking area of the target cell is consistent with the tracking area of the source cell, sending a first tracking area updating request to the MME. Because the tracking areas of the source cell and the target cell are consistent, the UE can immediately resend the tracking area update request to the MME, compared with the prior art, the UE does not need to wait for the tracking area update message resent by the MME after 6S, or the UE does not need to wait for 25S to resend the tracking area update request to the MME, thereby shortening the time for sending the tracking area update request twice, improving the tracking area update efficiency, greatly shortening the time for losing the message and improving the called success rate of the UE.

In another embodiment, after the UE sends the tracking area update request, the tracking area update message sent by the MME may be received. Thus, on the basis of the above embodiment, the above method may further include: receiving a tracking area update message sent by an MME; the tracking area update message is sent after the MME determines that the content of the first tracking area update request is the same as the content of the second tracking area update request.

The tracking area update message refers to a response message of the MME to a tracking area update request sent by the UE after the MME receives the tracking area update request.

And after the MME receives the two tracking area updating requests, determining that the contents of the two tracking area updating requests are consistent, and then sending a tracking area updating message to the UE. Optionally, the MME may send the tracking area update message to the target base station, and forward the tracking area update message to the UE through the target base station, that is, the UE may receive the tracking area update message sent by the target base station. Optionally, the MME may send the tracking area update message to the source base station, forward the tracking area update message to the target base station through the source base station, and then forward the tracking area update message to the UE by the target base station, that is, the UE may receive the tracking area update message sent by the target base station. The present embodiment does not limit the manner of receiving the tracking area update message sent by the MME.

In the tracking area updating method, if the UE generates cell switching in the TAU process, a tracking area updating request is sent to the MME, a tracking area updating message sent by the MME is received, and the TAU process of the target cell is determined to be completed according to the tracking area updating message. In the TAU process, after the UE sends the tracking area update request twice successively, when the MME determines that the contents of the two tracking area update requests are the same, the MME sends the tracking area update message to the UE, and only one tracking area update request needs to be processed in the process, so that the UE can quickly receive the tracking area update message corresponding to the tracking area update request, and the efficiency of the TAU process is improved.

Fig. 10 is a flowchart of a tracking area updating method according to an embodiment of the present application. This embodiment relates to an alternative implementation of how to determine that a UE has cell handover during TAU. On the basis of the embodiment of fig. 9, as shown in fig. 10, the method may further include the following steps:

S1001, acquiring a preset value of a first variable.

In this embodiment, since the non-access stratum (Non Access Stratum, NAS) in the UE is not synchronized with the state of the radio resource control layer (Radio Resource Control, RRC), a preset first variable (TAUOngoing) needs to be set, and the UE determines whether cell handover occurs in the UE during TAU procedure through the value of TAUOngoing. The preset value of the first variable may be a first value, and if the preset value of the first variable is the first value, the UE performs cell handover during the TAU procedure. For example, the value TAUOngoing may be set to 1 or 0, and if the value of the first variable is 1, it indicates that the UE performs cell handover during TAU; if the value of the first variable is 0, it indicates that the UE does not perform cell handover during TAU. Or the value of the first variable may be True or False, where True indicates that the UE performs cell switching in the TAU process, and False indicates that the UE does not perform cell switching in the TAU process, which is not limited in the embodiment of the present application.

S1002, if the value of the first variable is the first value, it is determined that the UE performs cell handover during TAU.

In this embodiment, when the value of the first variable is the first value, the UE enters the source cell from the idle state, the TA of the source cell is not in the TA of the previous cell, the UE sends a tracking area update request to the MME, and the UE performs the TAU procedure. And when the value of the first variable is a first value, determining that the UE does not receive the tracking area updating message, switching the source cell to the target cell.

According to the tracking area updating method, the UE acquires the preset value of the first variable, and if the value of the first variable is the first value, the UE is determined to have cell switching in the TAU process. In the method, the UE can quickly determine whether the UE generates cell switching in the TAU process or not through the value of the first variable, so that the judging time of the UE is shortened, the judging speed of the UE side is higher, and the tracking efficiency of the tracking area is improved.

Fig. 11 is a flowchart of a tracking area updating method according to an embodiment of the present application. This embodiment relates to an alternative implementation of how to determine whether the tracking area of the target cell coincides with the tracking area of the source cell. On the basis of the embodiment of fig. 9, as shown in fig. 11, the method may further include the following steps:

s1101, sending a measurement report to a source base station corresponding to a source cell; the measurement report is used for indicating the source base station to switch with the target base station corresponding to the target cell.

In this embodiment, since the handover between base stations is triggered by the measurement report, the handover between base stations is triggered when the UE transmits the measurement report, the handover between base stations is not triggered when the UE does not transmit the measurement report, and the UE may delay transmitting the measurement report to delay triggering the handover between base stations.

The source base station sends a measurement control message to the UE, the UE generates a measurement report from the measurement control message after receiving the measurement control message, the UE sends the measurement report to the source base station, the source base station executes an H0 decision process, the source base station sends a Handover Request message (Handover Request) to the target base station, the target base station returns a Handover confirm message (Handover Request Ack) to the source base station, and the Handover process between the source base station and the target base station is completed.

Fig. 12 is a flowchart of a tracking area updating method according to an embodiment of the present application. This embodiment relates to an alternative implementation of sending a measurement report to a source base station corresponding to a source cell. On the basis of the embodiment of fig. 11, as shown in fig. 12, the step S1101 may include the following steps:

S1201, acquiring a preset value of a second variable and the current rate of the UE.

In this embodiment, a preset second variable (TAUOngoing) needs to be set to determine the time when the UE sends the measurement report to the base station, and the UE determines whether the UE sends the measurement report to the base station through the value of TAUOngoing. The preset value of the second variable may include the second value, and if the preset value of the second variable is the second value, the UE sends a measurement report to the base station. For example, the value TAUOngoing may be set to 1 or 0, if the second value of the second variable is 1, indicating that the UE temporarily does not send a measurement report to the base station; if the second value of the second variable is 0, the UE may send a measurement report to the base station. Or the value of the second variable may be True or False, where True indicates that the UE does not send a measurement report to the base station temporarily, and False indicates that the UE may send a measurement report to the base station, which is not limited in the embodiment of the present application.

Alternatively, the UE may obtain the current rate of the UE through a self-contained tachometer sensor. Optionally, the UE may also obtain a movement distance and a movement time of the UE, and obtain the current rate of the UE according to a calculation formula of the rate. The present embodiment is not limited to a manner of acquiring the current rate of the UE.

And S1202, if the value of the second variable is the second value and the current rate is smaller than the preset rate threshold, modifying the value of the second variable to the third value after the TAU is completed, and sending a measurement report to the source base station.

In this embodiment, the UE compares the current rate with a preset rate threshold, and if the current rate is greater than the preset rate threshold, the UE is in a high-speed state; and if the current speed is smaller than or equal to a preset speed threshold, the UE is in a medium speed or low speed state. When the UE is in a high-speed state, the UE delays reporting the measurement report in the high-speed state, which may cause degradation of the wireless environment.

If TAUOngoing has a value of 1, it is determined that the UE temporarily does not transmit a measurement report to the base station. And when the UE receives the tracking area updating message sent by the MME and then sends the tracking area updating completion message to the MME, the TAU process is completed, and when the UE modifies the TAUOngoing value to 0, the UE sends a measurement report to the source base station, and after the source base station receives the measurement report, the UE switches to the target base station to complete switching from the source base station to the target base station.

In the tracking area updating method, the UE acquires the preset value of the second variable and the current speed of the UE, and if the value of the second variable is the second value and the current speed is smaller than the preset speed threshold, the value of the second variable is modified to be the third value after the TAU is completed, and a measurement report is sent to the source base station. The method determines whether the UE delays uploading the measurement report or not through the value of the second variable so as to ensure that the UE is switched from the source base station to the target base station after the TAU process is finished, avoid simultaneous performance of the TAU process and the base station switching process, and improve the updating efficiency of the tracking area.

S1102, receiving tracking area information of a target cell sent by a target base station.

In this embodiment, the tracking area is a configuration at a cell level, different cells may configure the same tracking area information, and one cell belongs to one tracking area. The base station corresponding to the target cell is a target base station, and the UE may receive tracking area information of the target cell sent by the target base station.

S1103, judging whether the tracking area of the target cell is consistent with the tracking area of the source cell according to the tracking area information of the source cell and the tracking area information of the target cell.

In this embodiment, the UE may match the tracking area information of the source cell with the tracking area information of the target cell, and if the tracking area information of the source cell is successfully matched with the tracking area information of the target cell, determine that the tracking area of the target cell is consistent with the tracking area of the source cell; if the tracking area information of the source cell is not successfully matched with the tracking area information of the target cell, determining that the tracking area of the target cell is inconsistent with the tracking area of the source cell.

According to the tracking area updating method, the UE sends the measurement report for indicating the source base station to switch with the target base station corresponding to the target cell to the source base station corresponding to the source cell, receives the tracking area information of the target cell sent by the target base station, and judges whether the tracking area of the target cell is consistent with the tracking area of the source cell according to the tracking area information of the source cell and the tracking area information of the target cell. In the method, the UE can quickly obtain the tracking area information of the target cell sent by the target base station by sending a measurement report to the source base station; meanwhile, the UE compares the tracking area information of the source cell with the tracking area information of the target cell, so that whether the tracking areas of the target cell and the source cell are consistent can be accurately determined, and the updating efficiency of the tracking area is improved.

In one embodiment, as shown in fig. 13, a tracking area updating method is provided, and the method is applied to the MME in fig. 1 for illustration, and includes the following steps:

S1301, receiving a first tracking area update request and a second tracking area update request sent by UE; the first tracking area update request is sent after the UE generates cell switching in the TAU process, and the second tracking area update request is sent when the UE triggers the TAU;

In this embodiment, the UE may send the second tracking area update request to the source base station, and send the second tracking area update message to the MME through the source base station, that is, the MME receives the second tracking area update request forwarded by the source base station. And the UE may send the first tracking area update request to the target base station, and send the first tracking area update message to the MME through the target base station, that is, the MME receives the first tracking area update request forwarded by the target base station.

S1302, if the content of the first tracking area update request is the same as the content of the second tracking area update request, a tracking area update message is sent.

In this embodiment, the first tracking area update request and the second tracking area update request both include the identifier of the source cell, and the MME may match the identifier information carried by the first tracking area update request and the second tracking area update request, and if the two identifier information are the same, it is determined that the content of the first tracking area update request is the same as the content of the second tracking area update request.

In the tracking area updating method, the MME receives a first tracking area updating request and a second tracking area updating request sent by the UE, and if the content of the first tracking area updating request is the same as the content of the second tracking area updating request, a tracking area updating message is sent. In the method, a first tracking area update request is sent after a cell switching happens in the process of performing TAU by UE, a second tracking area update request is sent when the TAU is triggered by UE, after the MME determines that the content of the two tracking area update requests is consistent, a tracking area update message can be sent to a target base station, the MME does not need to wait for 6s, and the tracking area update message can be immediately sent to the target base station, so that the working efficiency of the MME is improved.

In one embodiment, this embodiment relates to an alternative implementation of sending a tracking area update message if the content of the first tracking area update request and the content of the second tracking area update request are the same. Based on the embodiment of fig. 13, the step S1302 may further include the following steps: and if the MME does not send the tracking area update message according to the second tracking area update request before receiving the first tracking area update request and the second tracking area update request, sending the tracking area update message to the target base station corresponding to the cell switching.

In this embodiment, after receiving the second tracking area update request and the first tracking area update request, the MME does not send a tracking area update message corresponding to the second tracking area update request to the source base station. In this case, the content of the first tracking area update request is the same as the content of the second tracking area update request, and the MME only needs to process the second tracking area update request message and send a tracking area update message corresponding to the second tracking area update request message to the target base station.

In the tracking area updating method, if the MME does not send the tracking area updating message according to the second tracking area updating request before receiving the first tracking area updating request and the second tracking area updating request, the MME sends the tracking area updating message to the target base station corresponding to the cell switching. Under the condition that the content of the two tracking area updating requests received by the MME is the same, only the previous tracking area updating request is required to be processed, the MME only needs to send the tracking area updating request to the target base station, processes one tracking area updating request and sends the tracking area updating message to one base station, so that the working efficiency of the MME is improved.

In one embodiment, this embodiment relates to an alternative implementation of sending a tracking area update message if the content of the first tracking area update request and the content of the second tracking area update request are the same. Based on the embodiment of fig. 13, the step S1302 may further include the following steps: if the tracking area update message is sent to the target base station corresponding to the cell switch according to the second tracking area update request before the first tracking area update request is received, the tracking area update message is resent to the target base station after the first tracking area update request is received.

In this embodiment, after receiving the second tracking area update request and before not receiving the first tracking area update request, the MME has sent a tracking area update message corresponding to the second tracking area update request to the source base station, but has not received a tracking area update complete message sent by the UE. In this case, the content of the first tracking area update request is the same as the content of the second tracking area update request, and the MME does not need to process the first tracking area update request message, and sends the tracking area update message corresponding to the second tracking area update request to the target base station again.

In the tracking area updating method, if the tracking area updating message is sent to the target base station corresponding to the cell handover according to the second tracking area updating request before the first tracking area updating request is received, the tracking area updating message is resent to the target base station after the first tracking area updating request is received. If the MME has sent the tracking area update message to the source base station, and the content of the two tracking area update requests received by the MME is the same, the MME repeatedly sends the tracking area update message to the target base station, and the process does not need to process the first dirty update request and only needs to resend the tracking area update message to the target base station.

Further, it can be understood that the above tracking area updating method is not only suitable for LTE systems, but also can solve the problem that the UE cannot be paged in a period of time by the technical scheme provided by the present application when the tracking area where the UE is located changes and triggers the mobility registration (registration) process in the global 5G standard (5G radio, nr) system.

In an embodiment, on the basis of the foregoing embodiment, a tracking area updating method is provided, as shown in fig. 14, where the method includes:

S1401, if cell switching occurs in the process of performing TAU by the UE, acquiring a preset value of a first variable;

S1402, if the value of the first variable is the first value, determining that cell handover occurs in the UE in the TAU procedure;

s1403, if the tracking area of the target cell is consistent with the tracking area of the source cell, a first tracking area update request is sent to the MME;

S1404, receiving a tracking area update message sent by the MME.

It should be noted that, for the description in S1401-S1404, reference may be made to the description related to the above embodiment, and the effects are similar, which is not repeated here.

Further, the tracking area updating method provided by the present application is described in detail with reference to the flowcharts shown in fig. 15, 16 and 17.

In fig. 15, the UE enters an a cell in an idle state, and the TA of the a cell is not in the tracking area list of the previous cell, the UE sends a tracking area update request to the MME, when the UE confirms that the tracking area update message is received, the UE does not send the tracking area update to the MME, the base station initiates handover, and after the UE switches to the B cell, the UE sends the tracking area update to the MME to complete, and the tracking area update procedure is completed. When the UE does not receive the tracking area update message, the base station initiates switching, the UE judges whether the tracking areas of the A cell and the B cell are consistent, and when the tracking areas of the A cell and the B cell are inconsistent, the UE reinitiates a TAU flow; when the tracking areas of the A cell and the B cell are consistent, the UE immediately resends the tracking area updating request, and after receiving the tracking area updating message sent by the MME, the UE sends the tracking area updating completion to the MME, and the tracking area updating process is completed.

Fig. 16 is a flow chart of a tracking area updating method, and fig. 16 is a flow chart of a tracking area updating method, in order to determine a position of TAUOngoing values, when a base station initiates handover in a TAU process of a UE, the UE determines whether TAs of an a cell and a B cell are consistent according to system messages returned by different base stations, and if the TAs of the a cell and the B cell are consistent, the UE sends a tracking area updating request to an MME again if the value of TAUOngoing is 1; if the TA of the A cell and the TA of the B cell are inconsistent, the UE initiates a new TAU flow.

Fig. 17 is a schematic flow chart of a tracking area updating method, fig. 17 is a flow chart of a tracking area updating method, in which a UE enters a new cell in an idle state, and the TA of the new cell is not in a tracking area list of a previous cell, the UE sends a tracking area updating request to an MME, and the tracking area updating flow starts, and at this time, a value of TAUOngoing is set to 1; when the tracking area update is completed or fails, the value of TAUOngoing is set to 0. When the UE is in a medium speed or low speed state and in a TAU process, the value of TAUOngoing is 1, the UE does not upload a measurement report to the base station temporarily, and after the TAU process is completed, the value of TAUOngoing is 0, and then the measurement report is uploaded to the source base station, so that the handover from the source base station to the target base station is completed. It will be appreciated that in this procedure, the TAU procedure and the base station handover procedure are completed independently, and only the TAU procedure or the base station handover procedure can be completed within the same time period.

In the tracking area updating method, if the cell switching occurs in the process of the TAU by the UE, a preset value of a first variable is obtained, if the value of the first variable is the first value, the cell switching occurs in the process of the TAU by the UE is determined, if the tracking area of the target cell is consistent with the tracking area of the source cell, a first tracking area updating request is sent to the MME, and a tracking area updating message sent by the MME is received. In the process, the UE does not need to wait for the tracking area update message sent by the MME, and can immediately resend the tracking area update request to the MME under the condition that the tracking areas of the source cell and the target cell are consistent.

It should be understood that, although the steps in the flowcharts related to the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.

Based on the same inventive concept, the embodiment of the application also provides a tracking area updating device for realizing the above-mentioned related tracking area updating method. The implementation of the solution provided by the apparatus is similar to the implementation described in the above method, so the specific limitation in the embodiments of the tracking area updating apparatus or apparatuses provided below may be referred to the limitation of the tracking area updating method hereinabove, and will not be repeated here.

In one embodiment, as shown in fig. 18, there is provided a tracking area updating apparatus including: a first judging module 11 and a first transmitting module 12, wherein:

A first judging module 11, configured to judge whether a tracking area of a target cell is consistent with a tracking area of a source cell if cell handover occurs in a process of performing TAU by the UE;

A first sending module 12, configured to send a first tracking area update request to the MME, if the tracking area of the target cell is consistent with the tracking area of the source cell; the content of the first tracking area update request is the same as the content of the second tracking area update request, which is sent when the UE triggers TAU.

The tracking area updating device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.

In an embodiment, on the basis of the above embodiment, the above apparatus further includes: a first receiving module, wherein:

A first receiving module, configured to receive a tracking area update message sent by an MME; the tracking area update message is sent after the MME determines that the content of the first tracking area update message is the same as the content of the second tracking area update message.

In an embodiment, on the basis of the above embodiment, the above apparatus further includes: the device comprises an acquisition module and a determination module, wherein:

The acquisition module is used for acquiring a preset value of a first variable;

And the determining module is used for determining that the UE generates cell switching in the process of performing TAU under the condition that the value of the first variable is the first value.

In an embodiment, on the basis of the above embodiment, the above apparatus further includes: the device comprises a second sending module, a second receiving module and a second judging module, wherein:

The second sending module is used for sending a measurement report to a source base station corresponding to the source cell; the measurement report is used for indicating the source base station to switch with the target base station corresponding to the target cell;

The second receiving module is used for receiving the tracking area information of the target cell sent by the target base station;

and the second judging module is used for judging whether the tracking area of the target cell is consistent with the tracking area of the source cell according to the tracking area information of the source cell and the tracking area information of the target cell.

In one embodiment, based on the above embodiment, the second transmitting module 16 includes: an acquisition unit and a first transmission unit, wherein:

The acquisition unit is used for receiving a first tracking area update request and a second tracking area update request sent by the UE; the first tracking area update request is sent after the UE generates cell switching in the TAU process, and the second tracking area update request is sent when the UE triggers the TAU;

And the first sending unit is used for sending the tracking area update message when the content of the first tracking area update request is the same as the content of the second tracking area update request.

In one embodiment, as shown in fig. 19, there is provided a tracking area updating apparatus including: a third receiving module 21 and a third transmitting module 22, wherein:

A third receiving module 21, configured to receive a first tracking area update request and a second tracking area update request sent by the UE; the first tracking area update request is sent after the UE generates cell switching in the TAU process, and the second tracking area update request is sent when the UE triggers the TAU;

And a third sending module 22, configured to send a tracking area update message if the content of the first tracking area update request is the same as the content of the second tracking area update request.

In one embodiment, based on the above embodiment, the third transmitting module 22 includes: a second transmitting unit in which:

And the second sending unit is used for sending the tracking area update message to the target base station corresponding to the cell switch if the tracking area update message is not sent according to the second tracking area update request before the first tracking area update request and the second tracking area update request are received.

In one embodiment, based on the above embodiment, the third sending module 22 further includes: a third transmission unit in which:

And the third sending unit is used for sending the tracking area update message to the target base station corresponding to the cell switch according to the second tracking area update request before receiving the first tracking area update request, and re-sending the tracking area update message to the target base station after receiving the first tracking area update request.

The various modules in the tracking area updating apparatus described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or independent of a processor in the electronic device, or may be stored in software in a memory in the electronic device, so that the processor may call and execute operations corresponding to the above modules.

In one embodiment, an electronic device is provided, which may be a server, and an internal structure thereof may be as shown in fig. 20. The electronic device includes a processor, a memory, an Input/Output interface (I/O) and a communication interface. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface is connected to the system bus through the input/output interface. Wherein the processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the electronic device is for storing tracking area update data. The input/output interface of the electronic device is used to exchange information between the processor and the external device. The communication interface of the electronic device is used for communicating with an external terminal through network connection. The computer program is executed by a processor to implement a tracking area update method.

In one embodiment, an electronic device is provided, which may be a terminal, and an internal structure diagram thereof may be as shown in fig. 21. The electronic device includes a processor, a memory, an input/output interface, a communication interface, a display unit, and an input device. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input/output interface. Wherein the processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic device includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input/output interface of the electronic device is used to exchange information between the processor and the external device. The communication interface of the electronic device is used for conducting wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a tracking area update method. The display unit of the electronic device is used for forming a visual picture, and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the electronic equipment, and can also be an external keyboard, a touch pad or a mouse and the like.

It will be appreciated by those skilled in the art that the structures shown in fig. 20 and 21 are merely block diagrams of portions of structures related to the present application and do not constitute limitations of the electronic device to which the present application is applied, and that a particular electronic device may include more or fewer components than shown in the drawings, or may combine certain components, or have different arrangements of components.

The embodiment of the application also provides a computer readable storage medium. One or more non-transitory computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the steps of a tracking area update method.

Embodiments of the present application also provide a computer program product containing instructions that, when run on a computer, cause the computer to perform a tracking area update method.

Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magneto-resistive random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (PHASE CHANGE Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in various forms such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.

Claims

1. A tracking area update method, the method comprising:

in the process of updating TAU in a tracking area by User Equipment (UE), if cell switching occurs, judging whether the tracking area of a target cell is consistent with the tracking area of a source cell;

if the tracking area of the target cell is consistent with the tracking area of the source cell, a first tracking area updating request is sent to a Mobile Management Entity (MME);

Receiving a tracking area update message sent by the MME; and the tracking area update message is sent after the MME determines that the content of the first tracking area update request is the same as the content of a second tracking area update request, and the second tracking area update request is sent when the UE triggers TAU.

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

Acquiring a value of a preset first variable;

And if the value of the first variable is a first value, determining that the UE generates cell switching in the process of performing the TAU.

3. The method according to claim 1, wherein the method further comprises:

Sending a measurement report to a source base station corresponding to the source cell; the measurement report is used for indicating the source base station to switch with a target base station corresponding to the target cell;

Receiving tracking area information of the target cell sent by the target base station;

and judging whether the tracking area of the target cell is consistent with the tracking area of the source cell or not according to the tracking area information of the source cell and the tracking area information of the target cell.

4. A method according to claim 3, wherein said sending a measurement report to a source base station corresponding to said source cell comprises:

Acquiring a preset value of a second variable and the current rate of the UE;

And if the value of the second variable is a second value and the current rate is smaller than a preset rate threshold, modifying the value of the second variable to a third value after the TAU is completed, and sending the measurement report to the source base station.

5. A tracking area update method, the method comprising:

Receiving a first tracking area update request and a second tracking area update request sent by UE; the first tracking area update request is sent after the UE generates cell switching in the process of TAU, and the second tracking area update request is sent when the UE triggers TAU;

6. The method of claim 5, wherein the first tracking area update request and the second tracking area update request each include an identification of a source cell, wherein sending a tracking area update message if the content of the first tracking area update request and the content of the second tracking area update request are the same comprises:

and if the tracking area update message is not sent according to the second tracking area update request before the first tracking area update request and the second tracking area update request are received, sending the tracking area update message to the target base station corresponding to the cell switch.

7. The method of claim 6, wherein the first tracking area update request and the second tracking area update request each include an identification of a source cell, wherein sending a tracking area update message if the content of the first tracking area update request and the content of the second tracking area update request are the same comprises:

If the tracking area update message is sent to the target base station corresponding to the cell handover according to the second tracking area update request before the first tracking area update request is received, the tracking area update message is resent to the target base station after the first tracking area update request is received.

8. A tracking area updating apparatus, comprising:

The first judging module is used for judging whether the tracking area of the target cell is consistent with the tracking area of the source cell or not if cell switching occurs in the process of updating the TAU of the tracking area by the User Equipment (UE);

A first sending module, configured to send a first tracking area update request to a mobility management entity MME, where a tracking area of the target cell is consistent with a tracking area of the source cell;

a first receiving module, configured to receive a tracking area update message sent by the MME; and the tracking area update message is sent after the MME determines that the content of the first tracking area update request is the same as the content of a second tracking area update request, and the second tracking area update request is sent when the UE triggers TAU.

9. A tracking area updating apparatus, comprising:

10. An electronic device comprising a memory and a processor, the memory having stored therein a computer program which, when executed by the processor, causes the processor to perform the steps of the tracking area updating method of any of claims 1 to 7.

11. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any one of claims 1 to 7.

12. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.