CN106998546A - A kind of co-location update method, system and relevant device - Google Patents

Abstract

The invention discloses a joint location update method, system and related equipment, which are used to reduce the intermediate link in the joint location update process when CSFB user MSC registration is abnormal, and reduce the time delay of the joint location update. The joint location update system includes MSC and MME, wherein: the MSC is configured to set the HSS/HLR confirmation status stored by itself as untrustworthy when it is determined that joint location update is required, and send a joint location update to the MME request; and execute the second joint location update operation according to the response message returned by the MME; the MME is used to return the response message to the MSC after performing the first joint location update operation according to the joint location update request.

Description

A joint location update method, system and related equipment

technical field

The present invention relates to the technical field of mobile communication, in particular to a joint location update method, system and related equipment.

Background technique

CSFB (Circuit Switched Fallback, Circuit Switched Fallback) is a way to realize voice calls in the LTE (Long Term Evolution, long-term evolution) system. It uses LTE terminals to perform TA (Tracking Area, tracking area)/LA (Location Area, location) under the LTE network. District) joint update implementation, the MME (Mobile Management Entity, Mobility Management Entity) of LTE and the MSC (Mobile Switching Center, Mobile Switching Center) of GSM (Global System for Mobile Communication, Global System for Mobile Communication) complete registration at the same time, when When the terminal initiates a voice call or receives a voice paging message in the LTE network, it uses the GSM frequency specified in the LTE downlink redirection signaling to fall back, and then initiates a voice call or responds to the paging process under GSM.

The joint location update process includes that the MME initiates a joint location update request to the MSC, and the MSC initiates a CS (Circuit Switched, circuit switched) domain location update process to the HSS (Home Subscriber Serve, Home Subscriber Server). After the joint location update is completed, the MME records the MSC corresponding to the UE (User Equipment, user equipment), the MSC records the MME corresponding to the UE, and the HSS records the MSC where the user is located. When the UE initiates a CSFB call or SMS as the calling party (MO, MO Mobile Originated), the MME needs to find the MSC according to the records; when the user receives a CSFB call or SMS (Short Message Service, short message) from the MT, the HSS can find the UE according to the records The corresponding MSC, the MSC finds the MME corresponding to the UE according to the record.

The existing CSFB joint location update process is a one-way update, that is, the MME side can only initiate a joint location update request to the MSC side, and the MSC cannot actively initiate a joint location update. Once the actual MSC of the UE does not match the MSC recorded in the HSS for some reason, the MME must be used to trigger the UE to perform a joint location update process again, and the MSC also needs to ensure that the MSC ID recorded in the HSS is updated. If the MSC recorded in the HSS does not match the actual MSC, it will directly cause CSFB voice calls and SMS failures when the UE is called (MT, Mobile Terminated).

Since CSFB is mainly a technical solution for implementing voice calls for users through MSC, the MSC side can detect abnormal usage of UE in time. Once the UE fails to be called due to the discrepancy between the MSC recorded in the HSS and the actual MSC where the UE is located, the MSC can quickly find out the cause by tracking signaling, etc. However, according to the current joint location update process, the MSC cannot initiate a joint location update. In this process, the registration information of the VLR (Visitor Location Register) corresponding to the UE can only be cleared at first, and then the MME where the UE is located can be found, and then the problem can be solved by contacting the MME side to force the user to re-register. It can be seen that there are many intermediate links passed through from the MSC discovering the abnormality until notifying the MME to force the user to re-register to ensure the HSS, which increases the time delay of the joint location update.

Contents of the invention

Embodiments of the present invention provide a joint location update method, system and related equipment, which are used to reduce the intermediate links in the joint location update process when CSFB user MSC registration is abnormal, and reduce the time delay of joint location update.

An embodiment of the present invention provides a joint location update system, including a mobile switching center MSC and a mobility management entity MME, wherein:

The MSC is configured to set the confirmed status of the Home Subscriber Server/Home Location Register HSS/HLR stored by itself as untrusted when it is determined that joint location update is required, and send a joint location update request to the mobility management entity MME; and Execute a second joint location update operation according to the response message returned by the MME;

The MME is configured to return a response message to the MSC after performing a first joint location update operation according to the joint location update request.

An embodiment of the present invention provides a joint location update method implemented by MSC, including:

When the mobile switching center MSC determines that joint location update is required, it sets the confirmation status of the home subscriber server/home location register HSS/HLR stored by itself as untrusted, and sends a joint location update request to the mobility management entity MME;

The MSC receives a response message returned after the MME performs a first joint location update operation according to the joint location update request;

The MSC performs a second joint location update operation according to the response message.

An embodiment of the present invention provides a joint location update method implemented by an MME, including:

The mobility management entity MME receives the joint location update request sent by the mobile switching center MSC;

A response message returned to the MSC after performing the first joint location update operation according to the joint location update request.

An embodiment of the present invention provides a mobile switching center device, including:

The sending unit is configured to set the confirmation state of the home subscriber server/home location register HSS/HLR stored in the mobile switching center MSC device as untrustworthy when it is determined that joint location update is required, and send the joint location to the mobility management entity MME update request;

a receiving unit, configured to receive a response message returned by the MME after performing a first joint location update operation according to the joint location update request;

An execution unit, configured to execute a second joint location update operation according to the response message.

An embodiment of the present invention provides a mobility management entity, including:

A receiving unit, configured to receive a joint location update request sent by a mobile switching center MSC;

A response unit, configured to return a response message to the MSC after performing the first joint location update operation according to the joint location update request.

The joint location update method, system, and related equipment provided by the embodiments of the present invention add a process in which the MSC actively triggers the MME to perform a joint location update. The MME initiates a joint location update operation according to the joint location update request sent by the MSC. The location update process is simple, which reduces the time delay of joint location update when CSFB user MSC registration is abnormal.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic structural diagram of a joint location update system provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of an implementation flow of an MSC implementing a joint location update method in an embodiment of the present invention;

FIG. 3 is a schematic diagram of an implementation flow of an MME implementing a joint location update method in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a mobile switching center in an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a mobility management entity in an embodiment of the present invention.

detailed description

Aiming at solving the problem in the prior art that when the MSC discovers an abnormality until it notifies the MME to initiate a joint location update, there are many intermediate links, resulting in a large delay in the joint location update, the embodiments of the present invention provide a joint location update method and device.

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention, and in the absence of conflict, the present invention The embodiments and the features in the embodiments can be combined with each other.

The inventors found that the existing joint location update process for UEs supporting CSFB is a one-way update process, that is, only the MME side can initiate a joint location update request to the MSC side, and the MSC cannot actively initiate a joint location update process. Once the actual MSC of the user does not match the MSC recorded in the HSS/HLR for some reason, the MME must be used to trigger the user to re-register the joint location. However, in the prior art, since the MSC side usually finds that the MSC where the UE actually resides does not match the MSC recorded in the HSS/HLR earlier than the MME, the MSC cannot handle or solve this problem by itself, and can only clear the registration information in the user VLR first. , and then find the MME where the user is located, and then contact the MME side to force the UE to re-register to solve this problem. There are many intermediate links in the above process, which increases the processing delay. The voice call fails, which seriously affects the user experience.

Therefore, in this application, aiming at the situation that the MSC can only passively accept the location update, it is realized that the MSC actively initiates the joint location update through the SGs interface. MSC can actively trigger CSFB-supporting UEs to perform a joint location update process without MME operations, ensuring that the relevant registration information in MME, MSC, and HSS/HLR is refreshed in a timely manner to the latest and correct information, and solves the problem of CSFB-supporting users The MSC recorded in HSS/HLR does not match the actual MSC, which simplifies the steps to solve such problems, improves the speed and efficiency of solving such problems, and enhances the initiative of MSC.

It should be noted that the HLR is set in the 2G or 3G mobile communication system, and the HSS is set in the 4G and its evolution mobile communication system, and the functions of the two in their respective mobile communication systems are similar.

As shown in FIG. 1 , a schematic structural diagram of a joint location update system provided by an embodiment of the present invention includes a mobile switching center MSC 11 and a mobility management entity MME 12, wherein:

The MSC 11 is configured to set the HSS/HLR (Home Subscriber Server/Home Location Register) confirmation status stored by itself as untrustworthy when it is determined that a joint location update is required, and send a joint location update to the MME (Mobility Management Entity) a location update request; and performing a second joint location update operation according to the response message returned by the MME;

The MME 12 is configured to return a response message to the MSC after performing the first joint location update operation according to the joint location update request.

Preferably, the MSC and the MME communicate through the SGs interface, and the SGs interface is used to implement CSFB calls and SGs-based SMS functions in the LTE network.

During specific implementation, when the MSC determines that it is necessary to initiate a joint location update request through the SGs interface (for example, when the UE that supports CSFB fails to call the CSFB call because the actual MSC is different from the MSC recorded in the HSS/HLR, the MSC side can pass The cause can be quickly discovered by methods such as signaling tracing, so that the MSC can determine that it is necessary to initiate a joint location update request). The MSC first sets the HSS/HLR confirmation status in the UE registration information as untrustworthy, then generates a CS (circuit domain) location update request and sends it to the MME through the SGs interface. Wherein, the request message sent by the MSC may contain at least one IMSI (International Mobile Subscriber Identification Number, International Mobile Subscriber Identification Number), or may not carry the IMSI. Wherein, if the request message sent by the MSC carries an IMSI, it is used to indicate that the MME needs to update the location of the UE corresponding to the carried IMSI; if it does not carry the IMSI, it is used to indicate that the MME needs to support all CSFB functions under the MSC The UE performs location update.

Based on this, according to whether the request message sent by the MSC carries the IMSI of the UE that needs to perform the joint location update, the joint location update provided by the embodiment of the present invention may have the following two implementation manners.

In the first embodiment, the request message sent by the MSC carries the IMSI of at least one UE that needs to perform joint location update.

In this implementation mode, after receiving the request message sent by the MSC, the MME first judges whether it has stored the corresponding IMSI. If it does not store the corresponding IMSI, the MME returns a joint location update failure message to the MSC through the SGs interface. If the corresponding IMSI is stored in itself, the MME sends a Location Update Request (joint location update notification message) to the MSC through the SGs interface to start joint location update. The request message and the subsequent complete location update process on the CS side, Location Update Accept (joint location update confirmation message), etc. are the same as the existing joint location update process, and will not be repeated here.

The MSC continues to complete subsequent operations according to the response message returned by the MME. Specifically, if the MME returns a joint location update failure message, the MSC deletes the user registration information; if the MME returns a Location Update Request message, the MSC notifies the HSS/HLR to update the location area where the UE corresponding to the IMSI is located, and modifies its own stored The HSS/HLR confirms the status as Trusted. If the MME does not return a response message, the MSC does not need to take any action.

In the second implementation manner, the request message sent by the MSC does not carry the IMSI of the UE that needs to perform joint location update.

In this implementation manner, the MME sends a joint location update notification message to the MSC for all CSFB-capable UEs registered under the MSC sending the request message to perform joint location update. During specific implementation, the MME can group all CSFB-supporting UEs registered under the MSC that sent the request message. For example, the MME can group the UEs according to the IMSI, or group the UEs according to user signaling. The embodiment of the present invention This is not limited. Based on the grouping result, all CSFB-supporting UEs registered under the MSC sending the request message send a joint location update notification message to the MSC in batches for joint location update.

During specific implementation, the process of the joint location update performed by the MME for each group of UEs is similar to the above-mentioned first embodiment, that is, for each group of UEs, the MME sends a Location Update Request (joint location update notification message) to the MSC through the SGs interface Start federated location updates. The request message and the subsequent complete location update process on the CS side, Location Update Accept (joint location update confirmation message), etc. are the same as the existing joint location update process, and will not be repeated here. The MSC notifies the HSS/HLR to update the location area where the UE corresponding to the IMSI is located, and modifies the HSS/HLR confirmation status stored by itself as trusted.

The above describes the implementation process of the MSC actively initiating the joint location update through the SGs interface, and performs processing according to whether the request message sent by the MSC carries the IMSI of the UE that needs to perform the joint location update. The process for carrying the IMSI of the UE that needs to perform joint location update is used to actively update the CS side location information of the corresponding UE; if it does not carry the IMSI of the UE that needs to perform joint location update, then for MSC/VLR (Home Location Register) All CSFB-capable UEs in the network will perform a joint location update, which will trigger the MME to re-register all CSFB-capable UEs associated with the MSC/VLR.

The joint location update method provided by the embodiment of the present invention adds that the MSC actively sets the flag for the user, initiates a CS location update request message, and the MME processes the CS location update request sent by the MSC accordingly, so as to realize the MSC actively triggering the CSFB user The purpose of conducting a joint position. Therefore, in the prior art, the MSC finds that the MSC where the CSFB user (i.e., the UE supporting the CSFB function) actually resides does not match the MSC recorded in the HSS/HLR, and there are many intermediate links to be passed when notifying the MME to perform joint location update, which increases the The problem of processing delay when CSFB user MSC registration is abnormal.

Based on the same inventive concept, the embodiment of the present invention also provides a joint location update method and related equipment respectively implemented by MSC and MME. Since the problem solving principle of the above method and equipment is similar to that of the joint location update system, the above method and For the implementation of the equipment, please refer to the implementation of the system, and the repetitive parts will not be repeated.

As shown in FIG. 2 , a schematic flow chart of implementing the joint location update method provided by the embodiment of the present invention for the MSC may include the following steps:

S21. When the MSC determines that a joint location update is required, the MSC sets the HSS/HLR confirmation status stored in itself as untrusted, and sends a joint location update request to the MME.

S22. The MSC receives a response message returned by the MME after performing the first joint location update operation according to the joint location update request.

S23. The MSC performs a second joint location update operation according to the response message.

Optionally, the joint location update request carries the IMSI of the user equipment UE that needs to perform joint location update; correspondingly, the response message returned by the MME includes if the MME determines that it has stored the IMSI, the IMSI The corresponding joint location update notification message sent by the UE to the MSC, or the joint location update failure message sent by the MME to the MSC when the MME determines that it does not store the IMSI. Based on this, in step S23, when the MSC receives the joint location update notification message sent by the MME for the UE corresponding to the IMSI, it notifies the HSS/HLR to update the location area where the UE corresponding to the IMSI is located; and Modify the HSS/HLR confirmation status stored by itself to be trusted. If the MSC receives the joint location update failure message returned by the MME, it deletes the registration information of the corresponding user.

As shown in FIG. 3 , a schematic flow diagram of the implementation flow of the joint location update method provided by the embodiment of the present invention for the MME to implement may include the following steps:

S31. The MME receives the joint location update request sent by the MSC.

Among them, when the MSC determines that it needs to initiate a joint location update request through the SGs interface (for example, when the called CSFB call fails because the UE that supports CSFB is actually located different from the MSC recorded in the HSS/HLR, the MSC side can pass the signal Therefore, the MSC can determine that it is necessary to initiate a joint location update request) and send a joint location update request to the MME.

S32. A response message returned by the MME to the MSC after performing the first joint location update operation according to the joint location update request.

If the joint location update request carries at least one IMSI of the UE that needs to perform joint location update, then in step S32, the MME first judges whether it has stored the corresponding IMSI, and if so, sends the IMSI to the UE corresponding to the IMSI carried in the request message. Send a joint location update notification message to the MSC; if not, send a joint location update failure message to the MSC that sent the request message. If the joint location update request does not carry the IMSI of the UE that needs to perform joint location update, then in step S32, the MME sends a joint location update notification message to the MSC for all CSFB-capable UEs registered under the MSC that sent the request message to perform joint location update. Location update.

As shown in Figure 4, the schematic structural diagram of the MSC provided by the embodiment of the present invention may include:

The sending unit 41 is configured to set the HSS/HLR confirmation status stored in the MSC device as untrustworthy when it is determined that a joint location update is required, and send a joint location update request to the MME;

The receiving unit 42 is configured to receive a response message returned by the MME after performing a first joint location update operation according to the joint location update request;

The execution unit 43 is configured to execute a second joint location update operation according to the response message.

Preferably, the joint location update request carries the International Mobile Subscriber Identity (IMSI) of the user equipment UE that needs to perform joint location update; and the response message returned by the MME includes if the MME determines that it has stored the IMSI, For the joint location update notification message sent by the UE corresponding to the IMSI to the MSC, or the joint location update failure message sent to the MSC when the MME determines that it does not store the IMSI. Based on this, the execution unit 43 includes:

a notification subunit, configured to notify the HSS/HLR to update the location area where the UE corresponding to the IMSI is located when the receiving unit receives the joint location update notification message sent by the MME for the UE corresponding to the IMSI;

The modifying subunit is configured to modify the HSS/HLR confirmation state stored by itself as credible.

As shown in FIG. 5, a schematic structural diagram of an MME (Mobility Management Entity) provided by an embodiment of the present invention may include:

A receiving unit 51, configured to receive a joint location update request sent by the MSC;

The response unit 52 is configured to return a response message to the MSC after performing the first joint location update operation according to the joint location update request.

Wherein, the joint location update request carries at least one IMSI of the UE that needs to perform joint location update; and

The responding unit 52 is specifically configured to send a joint location update notification message to the MSC for the UE corresponding to the IMSI if it is determined that the mobility management entity has stored the IMSI; if it is determined that the mobility management entity does not When the IMSI is stored, send a joint location update failure message to the MSC.

If the joint location update request does not carry the IMSI of the UE that needs to perform joint location update; the response unit 52 is specifically configured to send a joint location to the MSC for all UEs registered under the MSC that support CSFB fallback Update notification messages for joint location updates.

For the convenience of description, the above parts are divided into modules (or units) according to their functions and described separately. Certainly, when implementing the present invention, the functions of each module (or unit) can be implemented in one or more pieces of software or hardware.

The joint location update method, system, and related equipment provided by the embodiments of the present invention add a process in which the MSC actively triggers the MME to perform a joint location update. The MME initiates a joint location update operation according to the joint location update request sent by the MSC. The location update process is simple, which reduces the time delay of joint location update when CSFB user MSC registration is abnormal.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the present invention have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (14)

1. a kind of co-location more new system, it is characterised in that including moving exchanging center MSC and movement Property management entity MME, wherein：

The MSC, for when it is determined that needing to carry out co-location renewal, the ownership itself stored to be used Family server/attaching position register HSS/HLR acknowledgement states are set to insincere and real to mobile management Body MME sends co-location and updates request；And the response message returned according to the MME performs the Two joint location update operations；

The MME, the renewal operation of the first co-location is performed for updating request according to the co-location The response message that the backward MSC is returned.

2. the system as claimed in claim 1, it is characterised in that the co-location updates to be taken in request International mobile subscriber identity with least one user equipment (UE) that need to carry out co-location renewal IMSI；And

The MME, specifically for determine itself to be stored with the IMSI when, for the IMSI correspondence UE to MSC send co-location update notification message；And determine the IMSI that itself is not stored with When, send co-location to the MSC and update failed message；

The MSC, specifically for receiving the MME for the corresponding UE transmissions of the IMSI Co-location update notification message when, notify the HSS/HLR to update the corresponding UE institutes of the IMSI Position area, and change the HSS/HLR acknowledgement states of itself storage to be credible.

3. the system as claimed in claim 1, it is characterised in that if the co-location updates request In do not carry the UE that need to carry out co-location renewal IMSI；Then

The MME, specifically for all support circuit domain dropping CSFB for being registered under the MSC UE send co-location update notification message to MSC and carry out co-location renewal.

4. the system as described in claim 1,2 or 3, it is characterised in that the MME with it is described Pass through SGs interface communications between MSC.

5. a kind of co-location update method, it is characterised in that including：

When moving exchanging center MSC determines to need to carry out co-location renewal, the ownership itself stored is used Family server/attaching position register HSS/HLR acknowledgement states are set to insincere and real to mobile management Body MME sends co-location and updates request；

The MSC receives the MME and updates request the first co-location of execution according to the co-location Update the response message returned after operation；

The MSC performs the second co-location according to the response message and updates operation.

6. method as claimed in claim 5, it is characterised in that the co-location updates to be taken in request International mobile subscriber identity IMSI with the user equipment (UE) that need to carry out co-location renewal；And institute If state response message including the MME determine itself to be stored with the IMSI when, for the IMSI The co-location update notification message that corresponding UE is sent to MSC, or the MME determine itself Be not stored with the IMSI when, to the MSC send co-location update failed message；And

The MSC performs the second co-location according to the response message and updates operation, specifically includes：

The MSC is receiving the co-location that the MME is sent for the corresponding UE of the IMSI During update notification message, the HSS/HLR is notified to update the position area where the corresponding UE of the IMSI； And

The HSS/HLR acknowledgement states for changing itself storage are credible.

7. a kind of co-location update method, it is characterised in that including：

Mobility management entity MME receives the co-location renewal request that moving exchanging center MSC is sent；

The backward MSC of request execution the first co-location renewal operation is updated according to the co-location to return The response message returned.

8. method as claimed in claim 7, it is characterised in that the co-location updates to be taken in request International mobile subscriber identity with least one user equipment (UE) that need to carry out co-location renewal IMSI；And

The backward MSC of request execution the first co-location renewal operation is updated according to the co-location to return The response message returned, is specifically included：

If it is determined that itself is stored with during the IMSI, then for the corresponding UE of the IMSI to MSC Send co-location update notification message；

If it is determined that itself is not stored with during the IMSI, then sends co-location to the MSC and update mistake Lose message.

9. method as claimed in claim 7, it is characterised in that if the co-location updates request In do not carry the UE that need to carry out co-location renewal IMSI；Then

Request is updated according to the co-location and performs the renewal operation of the first co-location, is specifically included：

The UE of all support circuit domain dropping CSFB for being registered under the MSC is sent to MSC to be joined Close location updating notification message and carry out co-location renewal.

10. a kind of switching center equipment, it is characterised in that including：

Transmitting element, for determining to need to carry out during co-location renewal, by the moving exchanging center MSC Equipment storage home subscriber server/home location register HSS/HLR acknowledgement states be set to it is insincere, And send co-location renewal request to mobility management entity MME；

Receiving unit, combines for receiving the MME according to co-location renewal request execution first The response message returned after location update operations；

Execution unit, operation is updated for performing the second co-location according to the response message.

11. equipment as claimed in claim 10, it is characterised in that the co-location is updated in request Carry the international mobile subscriber identity IMSI for the user equipment (UE) that need to carry out co-location renewal；And If the response message including the MME determine itself to be stored with the IMSI when, for the IMSI The co-location update notification message that corresponding UE is sent to MSC, or the MME determine itself Be not stored with the IMSI when, to the MSC send co-location update failed message；

The execution unit, including：

Subelement is notified, for receiving the MME for IMSI correspondences in the receiving unit UE send co-location update notification message when, notify the HSS/HLR to update described IMSI pairs Position area where the UE answered；

Subelement is changed, the HSS/HLR acknowledgement states for changing itself storage are credible.

12. a kind of mobility management entity, it is characterised in that including：

Receiving unit, the co-location for receiving moving exchanging center MSC transmission updates request；

Response unit, is performed after the renewal operation of the first co-location for updating request according to the co-location The response message returned to the MSC.

13. mobility management entity as claimed in claim 12, it is characterised in that the co-location Update the mobile use in the world that at least one user equipment (UE) that need to carry out co-location renewal is carried in request Family identification code IMSI；And

The response unit, specifically for the IMSI if it is determined that the mobility management entity is stored with When, then send co-location update notification message to MSC for the corresponding UE of the IMSI；If really The fixed mobility management entity be not stored with the IMSI when, then send co-location more to the MSC New failed message.

14. mobility management entity as claimed in claim 12, it is characterised in that if the joint The IMSI for the UE that need to carry out co-location renewal is not carried in position updating request；Then

The response unit, specifically for all support circuit domain droppings for being registered under the MSC CSFB UE sends co-location update notification message to MSC and carries out co-location renewal.