CN101150781A

CN101150781A - Called recovery method, device and system for mobile switching center pool

Info

Publication number: CN101150781A
Application number: CNA2007101815368A
Authority: CN
Inventors: 张彪; 罗华霖
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-10-18
Filing date: 2007-10-18
Publication date: 2008-03-26
Anticipated expiration: 2027-10-18
Also published as: WO2009049515A1; CN101150781B

Abstract

The embodiment of the invention provides a called recovering method in a mobile switching center pool MSCPOOL, the method comprises: the backup mobile switching center MSC of a called terminal receives a provide roaming number PRN message sent by a home location register HLR; the backup MSC of the called terminal acquires MSRN which is allocated for the called terminal after the MSC receives page response of the called terminal and updates simulation locations; the backup MSC of the called terminal carries with the MSRN of the called terminal in the PRN response message to send to HLR. The embodiment of the invention also provides another called recovering method in MSCPOOL and the device and the system thereof. By utilizing the invention, a terminal is called successfully when being called terminal at first time under a failure MSC.

Description

The methods, devices and systems of called recovery in the mobile switching centre pond

Technical field

The present invention relates to mobile switching centre pond (MSC POOL) technology, particularly the methods, devices and systems of called recovery among the MSC POOL.

Background technology

3GPP23.236 proposed the diverse networking model of a kind of and traditional networking, a radio network controller (RNC)/base station controller (BSC) can be connected on a plurality of MSC, with the work of pond prescription formula, promptly a plurality of MSC have formed MSC POOL.MSC POOL has lot of advantages, and for example each MSC can load sharing, reduces the C/D message order between MSC and the attaching position register (HLR), reduces E interface message capacity between the MSC etc.

In MSC POOL, suppose that a certain MSC identifies with MSC1, when the terminal under this MSC1 when called, call flow mainly may further comprise the steps:

1) the caller gateway exchange is to the roaming number (MSRN) of HLR request terminal called;

2) HLR sends (PRN) message that Provides Roaming Number to Signaling Transfer Point, and STP sends to MSC1 with this PRN message again;

3) MSC1 is that terminal called distributes MSRN, the MSRN of this distribution is carried in the PRN response message sends to HLR;

4) HLR sends to the caller gateway exchange with the MSRN of terminal called, and the caller gateway exchange is routed to MSC1 according to the calling that MSRN initiates calling terminal.

By above-mentioned 1)-4) step, the access success that calling terminal is initiated to terminal called, wherein HLR obtains the MSRN of terminal called, is the key that realizes the terminal called access success.But above-mentioned flow process is based on MSC1 precondition working properly, if MSC1 hinders the machine of delaying for some reason, and when then the terminal of MSC1 correspondence is as terminal called, can't be according to above-mentioned flow process access success.There is a kind of solution at present at the problems referred to above, in the method, use VLR Visitor Location Register (VLR) redundancy technique, promptly, also use route priority or the active and standby technology of sharing of signaling link control section (SCCP) destination signaling point at the user data of the VLR back-up terminals in the MSC of terminal called distributing paging.Wherein, the active and standby technology of sharing of route priority or SCCP destination signaling point, both can choose one wantonly, are meant that all the master for the terminal place disposes standby MSC with MSC; And the VLR redundancy technique, comprise centralized backup and non-centralized backup, wherein centralized backup is meant the user data of all terminals in the network all on centralized backup to a MSC, this MSC is called centralized backup MSC server, but not centralized backup is meant that the user data backup of different terminals is to different MS C, each terminal all has the backup MSC of correspondence self, these two kinds of backup modes can be chosen one wantonly, terminal use's data of backup comprise the master data and the lane place of terminal, the zone at the current place of lane place indicating terminal wherein, be convenient to issue in this zone targetedly paging, solved the problem that can not issue the whole network paging among the MSC POOL terminal.

This solution mainly comprises:

1. HLR sends PRN message to STP, STP determine and MSC1 between senior route break down, this PRN message is sent on the MSC2 of the machine of not delaying among the MSC POOL, promptly this MSC2 is the backup MSC of MSC1, sends described PRN message from the low priority route;

2. issue the paging to terminal called on MSC2, insert the principle of lateral root according to load sharing, the page response that terminal called is sent sends on the MSC3 among the MSC POOL;

3. MSC3 carries out the position renewal to HLR, informs that HLR terminal called position has been updated under the MSC3;

This step can comprise that MSC3 sends position updating request to HLR; HLR sends the canceling position request to STP; STP sends to MSC2 with this canceling position request; MSC2 removes the terminal called user data of inner backup; HLR inserts the user data of terminal called again to MSC3; MSC3 be terminal called distribute can indicating self temporary mobile subscriber identity (TMSI); The user data of MSC3 after the MSC2 backup updating;

1. above-mentioned～3. be the terminal call flow when called for the first time under the fault MSC, because after the PRN message that 1. HLR sends in the step, in subsequent step, do not receive PRN response message at this PRN message, so HLR can't be the MSRN that obtains terminal when called for the first time in this terminal, so this terminal is done called the failure for the first time.

For the second time when called, use the step 2 of MSC3 at this terminal called according to aforementioned introduction)-3) just can make HLR in calling, obtain the MSRN of terminal called, thus realize that called terminal call is successfully.

Above-mentioned method of the prior art, though solved under certain MSC fault is delayed the situation of machine, the access success of terminal under this MSC when called, but terminal is for the second time could realize access success when called, promptly the completing place is upgraded in for the first time as called calling, and use the MSC after upgrading just can make HLR obtain the MSRN of terminal called when called for the second time, thereby make access success, can't realize that the terminal on the fault MSC just realizes for the first time access success when called.

Summary of the invention

The embodiment of the invention provides the method for called recovery among a kind of MSC POOL, and this method can make the terminal under the fault MSC among the MSC POOL, realizes for the first time access success when called.

The embodiment of the invention provides the method for called recovery among the another kind of MSC POOL, and this method can make the terminal under the fault MSC among the MSC POOL, realizes for the first time access success when called.

The embodiment of the invention provides the MSC among a kind of MSC POOL, uses this MSC can make the terminal under the fault MSC among the MSCPOOL, realizes for the first time access success when called.

The embodiment of the invention provides the MSC among the another kind of MSC POOL, uses this MSC can make the terminal under the fault MSC among the MSC POOL, realizes for the first time access success when called.

The embodiment of the invention provides the HLR among a kind of MSC POOL, uses this HLR can make the terminal under the fault MSC among the MSCPOOL, realizes for the first time access success when called.

The embodiment of the invention provides the STP among a kind of MSC POOL, uses this STP can make the terminal under the fault MSC among the MSCPOOL, realizes for the first time access success when called.

The embodiment of the invention provides the system of called recovery among a kind of MSC POOL, and this system can make the terminal under the fault MSC among the MSC POOL, realizes for the first time access success when called.

The embodiment of the invention provides the system of called recovery among the another kind of MSC POOL, uses this system can make the terminal under the fault MSC among the MSC POOL, realizes for the first time access success when called.

The technical scheme of the embodiment of the invention is achieved in that

The method of called recovery in a kind of mobile switching centre pond, this method comprises:

The backup MSC of terminal called receives the PRN message that HLR sends;

The backup moving exchanging center MSC of terminal called, the MSC that obtains reception terminal called page response is the roaming number MSRN that terminal called distributes carry out the position renewal to attaching position register HLR after;

The backup MSC of terminal called with the MSRN of described terminal called, is carried in the PRN response message that Provides Roaming Number and sends to HLR.

Receive the MSC of terminal called page response, when HLR carried out the position renewal, notice resend PRN message by STP;

Receive the MSC of terminal called page response, receive the PRN message that resends;

Receive the MSC of terminal called page response, the MSRN that will distribute for terminal called is carried in the PRN response message and sends to HLR.

Moving exchanging center MSC in a kind of mobile switching centre pond, this MSC comprises:

Processing module, the MSC that is used to obtain reception terminal called page response is the MSRN that terminal called distributes after HLR carries out the position renewal;

Sending module is used for the MSRN with the terminal called of described processing module, is carried in the PRN response message and sends to HLR.

MSC in a kind of mobile switching centre pond, this MSC comprises:

Processing module is used to receive the terminal called page response; When HLR carried out the position renewal, notice resend PRN message by STP; For terminal called distributes MSRN;

Transceiver module is used to receive the PRN message that resends; With described processing module is the MSRN that terminal called distributes, and is carried in the PRN response message to send to HLR.

Attaching position register HLR in a kind of mobile switching centre pond, this HLR comprises:

Location update processing module, the MSC that is used for resolving reception terminal called page response is in the position updating request that sends, and the indication of carrying resends the particular extension cell of PRN message;

The PRN message processing module, be used for according to the analysis result of described location update processing module described particular extension cell, dismounting sends to the PRN message on the backup MSC of terminal called, and by the MSC of STP to described reception terminal called page response, resends PRN message; Receive the PRN response message that the MSC of described reception terminal called page response returns, obtain the MSRN that distributes for terminal called that carries in the described PRN response message.

Signalling Transfer Point STP in a kind of mobile switching centre pond, this STP comprises:

Parsing module, the MSC that is used for resolving reception terminal called page response is in the position updating request that sends, and the indication of carrying resends the particular extension cell of PRN message;

The PRN message processing module is used to receive PRN message and the storage that HLR sends to the backup MSC of terminal called; According to the analysis result of described parsing module, the position updating request of deleting described particular extension cell is sent to HLR to described particular extension cell; The PRN message of described storage is sent to the MSC that receives the terminal called page response.

The system of called recovery in a kind of mobile switching centre pond, this system comprises:

The backup MSC of terminal called, the MSC that is used to obtain reception terminal called page response is the MSRN that terminal called distributes carry out the position renewal to HLR after, described MSRN is carried in the PRN response message send to HLR;

Receive the MSC of terminal called page response, be used to receive the page response of terminal called, for terminal called distributes MSRN.

Receive the MSC of terminal called page response, be used for by STP when HLR carries out the position renewal, notice resends PRN message; The PRN message that reception resends will be carried at for the MSRN that terminal called distributes in the PRN response message, send to HLR;

STP when being used for upgrading in the position, connects the mutual of the MSC of described reception terminal called page response and described HLR;

HLR is used to receive the PRN response message that carries the MSRN that distributes for terminal called that the MSC of described reception terminal called page response returns, and obtains described MSRN for the terminal called distribution.

As seen, the methods, devices and systems of called recovery among the MSC POOL that the embodiment of the invention provides, carry out after the position upgrades to HLR at the MSC that receives the terminal called page response, the MSC that the backup MSC of terminal called is obtained described reception terminal called page response is the MSRN that terminal called distributes, and, be carried in the PRN response message and send to HLR the MSRN of described terminal called; Perhaps, the MSC that receives the terminal called page response is when HLR carries out the position renewal, notice resends PRN message, promptly notify to the MSC that receives the terminal called page response and resend PRN message, thereby HLR can receive on the MSC of terminal called page response from this, obtains it and is the newly assigned MSRN of terminal called.By above-mentioned two kinds of approach, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realizes that this terminal makes the access success when called for the first time.

Description of drawings

Fig. 1 is the method flow diagram of called recovery among first kind of MSC POOL of the embodiment of the invention;

Fig. 2 is first kind of preferred embodiment flow chart that the method for called recovery among first kind of MSC POOL of the embodiment of the invention realizes on MSC;

Fig. 3 is second kind of preferred embodiment flow chart that the method for called recovery among first kind of MSC POOL of the embodiment of the invention realizes on MSC;

Fig. 4 is the third preferred embodiment flow chart that the method for called recovery among first kind of MSC POOL of the embodiment of the invention realizes on MSC;

Fig. 5 is the method flow diagram of called recovery among second kind of MSC POOL of the embodiment of the invention;

Fig. 6 is first kind of preferred embodiment flow chart of method of called recovery among second kind of MSC POOL of the embodiment of the invention;

Fig. 7 is second kind of preferred embodiment flow chart of method of called recovery among second kind of MSC POOL of the embodiment of the invention;

Fig. 8 is the MSC structural representation among first kind of MSC POOL of the embodiment of the invention;

Fig. 9 is the MSC structural representation among second kind of MSC POOL of the embodiment of the invention;

Figure 10 is the HLR structural representation among the embodiment of the invention MSC POOL;

Figure 11 is the structural representation of the STP among the embodiment of the invention MSC POOL.

Embodiment

For the purpose and the advantage that make the embodiment of the invention is clearer, the embodiment of the invention is described in further detail below in conjunction with accompanying drawing.

At first, introduce the method for called recovery among first kind of MSC POOL of the embodiment of the invention.

Fig. 1 is the method flow diagram of called recovery among first kind of MSC POOL of the embodiment of the invention.Before flow process shown in Figure 1 began, according to those skilled in the art's common practise, the backup MSC of terminal called received HLR by the PRN message that STP sends, and issues the paging to terminal called; The MSC that receives the terminal called page response is terminal called distribution T MSI, carries out the position to HLR and upgrades.

Flow process shown in Figure 1 comprises:

Step 101: the backup MSC of terminal called receives the PRN message that HLR sends.

Step 102: the backup MSC of terminal called, the MSC that obtains described reception terminal called page response is the MSRN that terminal called distributes carry out the position renewal to HLR after.

In this step, obtain MSRN method can for, the MSC that receives the terminal called page response will be carried in the private message for the MSRN that terminal called distributes, and send to the backup MSC of terminal called.

Step 103: the backup MSC of terminal called with the MSRN of described terminal called, is carried in the PRN response message and sends to HLR.

The method of called recovery among first kind of MSC POOL of the embodiment of the invention, carry out after the position upgrades to HLR at the MSC that receives the terminal called page response, the MSC that the backup MSC of terminal called is obtained described reception terminal called page response is the MSRN that terminal called distributes, and with the MSRN of described terminal called, be carried in the PRN response message and send to HLR, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realizes that this terminal makes the access success when called for the first time.

The first method that the embodiment of the invention provides can realize on MSC, below respectively in conjunction with concrete application scenarios, several preferred embodiments that realize on MSC is described.

At first, the first method that the embodiment of the invention provides still can adopt the VLR redundancy technique, and route priority technology.

In the VLR redundancy technique, backup mode still can be divided into two kinds of centralized backup and non-centralized backups, wherein in the centralized backup mode, the Backup Data of all terminals is concentrated and is stored on the centralized backup MSC server in the network, this centralized backup MSC server is not responsible manages business, and according to the data configuration relation, when needs carried out user data backup, other MSC in the network can arrive this centralized backup MSC server with the storage of subscriber data of needs backup; In non-centralized backup mode, the backup MSC that different terminals in the network is corresponding different, when needs carried out user data backup, the MSC at the current place of terminal can arrive the storage of subscriber data of needs backup the backup MSC of this terminal correspondence according to the identification information of terminal.

In route priority technology, STP is when transmitting the message of HLR transmission, route between each MSC in the network is divided into high low priority, STP directly is divided into the high priority route to the route between the purpose MSC of current HLR transmission message, and with STP process other MSC except that the purpose MSC of current HLR transmission message, the route to above-mentioned purpose MSC is divided into the low priority route again.

Network according to VLR backup mode and terminal called place is that 2G and 3G are application scenarios below, and the preferred embodiment that first method that the embodiment of the invention provides realizes on MSC is described, in following preferred embodiment, MSC and VLR adopt the mode of establishing of closing.

Fig. 2 is first kind of preferred embodiment flow chart that the method for called recovery among first kind of MSC POOL of the embodiment of the invention realizes on MSC.

The application scenarios of supposing this preferred embodiment is: in the VLR redundancy technique, adopt centralized backup; The main of terminal called is MSC A with MSC; The MSC of centralized backup is MSC B; The MSC that receives the terminal called page response is MSC C.

Flow process shown in Figure 2 comprises:

Step 201:HLR sends PRN message to STP, and purpose is to obtain MSRN from MSC A.

Step 202:STP is to the high priority routing failure of MSC A, and the described PRN message that STP selects the low priority route that HLR is sent sends to the MSC B of centralized backup.After MSC B receives PRN message, no longer transmit, PRN message is landed at local exchange, and from PRN message, take out international mobile subscriber identity (IMSI), terminal backup VLR in self this IMSI correspondence of internal searching, promptly search the user data of the terminal backup of IMSI correspondence, issue paging this terminal.

In this step, there are following several possible situations in MSC B distributing paging:

A) terminal called shutdown, then MSC B directly returns the information of terminal called shutdown to HLR, and process ends;

B) terminal called is in idle pulley, takes out lane place (LA) information of terminal called, and distributing paging in the indicated band of position of LA carries out paging with IMSI;

C) terminal called is in connection status, takes out LA, and distributing paging in the indicated band of position of LA carries out paging with IMSI.After MSC A fault, the terminal meeting call drop of conversing, so the backup VLR of terminal called correspondence, promptly user data does not obtain upgrading yet.

Step 203: after terminal called is received paging and made page response, Access Network (RAN) is according to the load balancing algorithm, the page response of terminal called is sent to MSC C, being RAN sends to a non-paging Originating Office with the page response of terminal called, and MSC C determines that terminal called do not register at local exchange.

In this step, the Non-Access Stratum node is selected may have IMSI in (IDNNS) cell between the territory in the page response in the 3G network, also may have TMSI, and that carry in the IDNNS cell in the page response in the 2G network all is IMSI, but because MSC B is the MSC of centralized backup, therefore no matter do not manage business, that the IDNNS cell in the page response carries is IMSI or TMSI, and this page response can not send to MSC B.

Step 204:MSC C sends position updating request by STP to HLR.

After step 205:HLR receives position updating request, send the canceling position request to STP, be used to cancel the positional information at the original place of terminal called, because STP arrives the high priority routing failure of MSC A, STP sends to this canceling location information request the MSC B of centralized backup.

After step 206:MSC B receives the canceling location information request, remove the user data among the VLR of self inner terminal called correspondence.

Step 207:MSC B sends the canceling position acknowledge message by STP to HLR.

Step 208:HLR inserts the user data of terminal called to MSC C.

Step 209:HLR sends the position to MSC C and upgrades the message of accepting.

Step 210:MSC C sends to the TMSI that terminal called distributes to RAN, and the network resource identifier among the TMSI of this distribution (NRI) can identify MSC C in MSC POOL.

Step 211:MSC C comprises that with the terminal called corresponding user data IMSI, lane place identification code (LAI) and User Status etc. backup to MSC B again, after upgrading as the terminal called position, at the user data of the new backup of MSC B.

Above-mentioned steps 204～step 211 has been finished the MSC that receives the terminal called page response, carries out the process that analog position upgrades to HLR.

Step 212:MSC C is that terminal called distributes MSRN, and the MSRN that distributes is sent to MSC B by privately owned MAP (MAP) signaling.

In this step, the private message that sends MSRN adopts privately owned MAP signaling to realize, this privately owned MAP signaling is the new signaling according to the semantical definition of existing protocol, known for those skilled in the art protocol semantics, here repeat no more, this privately owned MAP signaling structure is as follows, and wherein MSRN delegation is the MSRN for the terminal called distribution that carries.

MSRNREDIRECT?OPERATION::＝{

ARGUMENT?SEQUENCE{

{

MSRN?[0]IMPLICIT?OCTET?STRING(SIZE(4))，

IMSI?[2]IMPLICIT?OCTET?STRING(SIZE(8))，

MSISDN?[0]IMPLICIT?OCTET?STRING(SIZE(4))OPTIONAL，

}

::＝localValue：248

Step 213:MSC B is carried at MSRN in the PRN response message and returns to HLR.

In first kind of preferred embodiment that the method for called recovery realizes on MSC in first kind of MSC POOL of the embodiment of the invention, adopt the centralized backup mode, carry out after the position upgrades to HLR at the MSC that receives the terminal called page response, the MSC that centralized backup MSC server obtains described reception terminal called page response is the MSRN that terminal called distributes, and with the MSRN of described terminal called, be carried in the PRN response message and send to HLR, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realizes that this terminal makes the access success when called for the first time.

Fig. 3 is second kind of preferred embodiment flow chart that the method for called recovery among first kind of MSC POOL of the embodiment of the invention realizes on MSC.

The application scenarios of supposing this preferred embodiment is: in the VLR redundancy technique, adopt non-centralized backup; The main of terminal called is MSC A with MSC; The backup MSC of terminal called is MSC B; The MSC that receives the terminal called page response is MSC C; IDNNS cell in the terminal called page response comprises the TMSI that distributes before the MSC A fault, but not comprises IMSI in access layer network node selection function (NAS) cell.

Flow process shown in Figure 3 comprises:

Step 301～step 302 is identical with step 201～step 202.

Step 303: terminal called is received paging and is made page response, comprises the preceding TMSI that distributes to terminal called of MSC A fault in this page response in the IDNNS cell, comprises NRI among this TMSI, is used for the A at MSC POOL sign MSC; That carry in the Non-Access Stratum network node selection function NAS cell in this page response is IMSI.

The NRI that RAN carries according to the TMSI in the page response finds MSC A, finds MSC A fault, then according to the load balancing algorithm, page response is sent to MSC C in the MSC POOL.

Step 304～step 311 is identical with step 204～step 211.

The NRI that step 312:MSC C carries according to TMSI in the page response, and according to main configuration relation with MSC and standby MSC, the backup MSC of determining terminal called is MSC B, for terminal called distributes MSRN, the MSRN that distributes is sent to MSC B by privately owned MAP signaling.

In this step, the structure of private MAP signaling can be with identical shown in the step 212.

In above-mentioned flow process shown in Figure 3, if in step 303, RAN is according to the load balancing algorithm, page response is just in time sent to MSC B, promptly just in time send on the backup MSC of terminal called, then the follow-up flow process of step 303 can adopt another kind of mode to realize, promptly MSC B can directly carry out the position renewal to HLR, and, return the PRN response message that carries MSRN to HLR again for terminal called distributes MSRN.

In second kind of preferred embodiment that the method for called recovery realizes on MSC in first kind of MSC POOL of the embodiment of the invention, adopt non-centralized backup mode, the TMSI that the fault MSC that carries in the page response of terminal called distributes, carry out after the position upgrades to HLR at the MSC that receives the terminal called page response, the MSC that the backup MSC of terminal called is obtained described reception terminal called page response is the MSRN that terminal called distributes, and with the MSRN of described terminal called, be carried in the PRN response message and send to HLR, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realizes that this terminal makes the access success when called for the first time.

Fig. 4 is the third preferred embodiment flow chart that the method for called recovery among first kind of MSC POOL of the embodiment of the invention realizes on MSC.

The application scenarios of supposing this preferred embodiment is: the user data among the VLR adopts non-centralized backup; The main of terminal called is MSC A with MSC; The backup MSC of terminal called correspondence is MSC B; The MSC that receives the terminal called page response is MSC C; When terminal called is called out, the MSC A machine of delaying that breaks down; That the IDNNS cell in the terminal called page response carries is IMSI, also is IMSI and the NAS cell carries.

Flow process shown in Figure 4 comprises:

Step 401～step 402 is identical with step 201～step 202.

Step 403: terminal called is received paging and is made page response, comprises IMSI in the IDNNS cell in this page response, and that carry in the NAS cell also is IMSI.RAN is according to the IMSI that comprises in the IDNNS cell, search the corresponding relation of IMSI and MSC, embodiment can be searched the corresponding relation of IMSI and Global CN-ID or signalling point, and the backup MSC that finds terminal called is MSC B, and page response is sent to MSC B.

Step 404: consider the load balancing of MSC POOL, MSC B is redirected to processing on the MSC C according to the load of other MSC among the MSC POOL with page response.In this step, if the page response of all terminals on the fault MSC A is all handled on MSC B, will make MSC B load excessive, therefore can select that a part of page-response message is redirected to other MSC and go up processing, suppose that the terminal called page response in this preferred embodiment is redirected to processing on the MSC C.

Step 405～step 414 is identical with step 204～step 213.Wherein in the step 413 when MSCB sends the privately owned MAP signaling carry MSRN, the structure of this privately owned MAP signaling can be with identical shown in the step 212.

In this preferred embodiment, also execution in step 405 not, and directly handle page-response message by MSC B, be that the operation that MSC C finishes in step 405～step 414 all has MSC B to finish, but MSC B does not carry out the step of using private message to send MSRN, if this is that then the MSRN of terminal called itself is just distributed by MSC B because MSC B directly handles page-response message, MSCB is as long as after distributing MSRN, it is carried at send to HLR in the PRN response message and get final product.

In the third preferred embodiment that the method for called recovery realizes on MSC in first kind of MSC POOL of the embodiment of the invention, adopt non-centralized backup mode, the IMSI that the fault MSC that carries in the page response of terminal called distributes, carry out after the position upgrades to HLR at the MSC that receives the terminal called page response, the MSC that the backup MSC of terminal called is obtained described reception terminal called page response is the MSRN that terminal called distributes, and with the MSRN of described terminal called, be carried in the PRN response message and send to HLR, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realizes that this terminal makes the access success when called for the first time.

Secondly, introduce the method for called recovery among second kind of MSC POOL of the embodiment of the invention.

Fig. 5 is the method flow diagram of called recovery among second kind of MSC POOL of the embodiment of the invention, before flow process shown in Figure 5 begins, according to those skilled in the art's common practise, the backup MSC of terminal called, receive HLR by the PRN message that STP sends, issue paging terminal called; The MSC that receives the terminal called page response is terminal called distribution T MSI.

Flow process shown in Figure 5 comprises:

Step 501: receive the MSC of terminal called page response, when HLR carried out the position renewal, notice resend PRN message by STP.

Step 502: receive the MSC of terminal called page response, receive the PRN message that resends.

Step 503: receive the MSC of terminal called page response, will be carried at for the MSRN that terminal called distributes in the PRN response message and send to HLR.

The method of called recovery among second kind of MSC POOL of the embodiment of the invention, the MSC that receives the terminal called page response is when HLR carries out the position renewal, notice resends PRN message, promptly notify to the MSC that receives the terminal called page response and resend PRN message, thereby HLR can be from the MSC that receives the terminal called page response, be retrieved as the newly assigned MSRN of terminal called, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realizes that this terminal makes the access success when called for the first time.

The method of called recovery among second kind of MSC POOL of the embodiment of the invention, can on HLR or STP, realize, below respectively with regard to these two kinds of implementations, enumerate the preferred embodiment of two embodiment of the invention second methods, similarly, in these preferred embodiments, MSC and VLR adopt the mode of establishing of closing.

Fig. 6 is first kind of preferred embodiment flow chart of called recovery method among second kind of MSC POOL of the embodiment of the invention.The application scenarios of supposing this preferred embodiment is: the main of terminal called is MSC A with MSC; Standby MSC is MSCB; The MSC that receives the terminal called page response is MSC C; This method realizes on HLR.

Flow process shown in Figure 6 comprises:

Step 601:HLR sends PRN message to STP, and it is the MSRN that terminal called distributes that purpose is to obtain MSC A.

Step 602:STP is to the high priority routing failure of MSC A, and the MSC B that the described PRN message that HLR is sent sends to centralized backup walks the low priority route.MSC B no longer transmits after receiving PRN message, and PRN message is landed at local exchange.

Step 603:MSC B takes out IMSI from PRN message, at the terminal backup VLR of self this IMSI correspondence of internal searching, promptly search the terminal backup user data of IMSI correspondence, distributing paging.

B) terminal called is in idle pulley, takes out LA, and distributing paging in LA indicating positions zone carries out paging with IMSI;

C) terminal called is in connection status, takes out LA, and distributing paging in LA indicating positions zone carries out paging with IMSI.After MSC A fault, the terminal meeting call drop of conversing, so the backup VLR data of terminal called correspondence do not obtain upgrading yet.

At above-mentioned b) and c) two kinds of situations, MSC B finishes the distributing paging flow process behind distributing paging, and returns a cause value " user is unreachable " to HLR.

Step 604: after terminal called is received paging and made page response, RAN is according to the load balancing algorithm, the page response of terminal called is sent to MSC C, and promptly RAN sends to a non-paging Originating Office with the page response of terminal called, and MSC C determines that terminal called do not register at local exchange.

Step 605:MSC C sends position updating request by STP to HLR, carries the particular extension cell in this position updating request, is used for telling the MSRN of HLR to MSC C obtains terminal called, promptly tells HLR to send PRN message to MSC C again.

In this step, the structure of particular extension cell can be as follows, and wherein the part after the extensionContainer resends the content of PRN message for notice.

updateLocation?OPERATION

ARGUMENT

updateLocationArg?SEQUENCE{

imsi OCTET?STRING(SIZE(3..8))，

msc-Number [1]IMPLICIT?OCTET?STRING(SIZE(1..20))(SIZE(1..9))，

vlr-Number OCTET?STRING(SIZE(1..20))(SIZE(1..9))，

lmsi [10]IMPLICIT?OCTET?STRING(SIZE(4))OPTIONAL，

extensionContainer SEQUENCE{

privateExtensionList?[0]IMPLICIT?SEQUENCE?(SIZE(1..10))OF

SEQUENCE{

extId MAP-EXTENSION.&extensionId?({//0x(2a?86?08?08?08?08

08?05)

...})，

extType MAP-EXTENSION.&ExtensionType({

PRN_REQ；

...}{@extId } ) OPTIONAL}OPTIONAL，

pcs-Extensions [1]IMPLICIT?SEQUENCE{

...}OPTIONAL，

...，

After step 606:HLR receives position updating request, determine to have in this position updating request the particular extension cell.

Step 607:HLR sends the request of cancelling terminal called original position information to STP, because STP arrives the high priority routing failure of MSC A, STP sends to this canceling location information request the MSC B of centralized backup.

After step 608:MSC B receives the canceling location information request, remove the user data among the VLR of self inner terminal called correspondence.

Step 609:MSC B sends the canceling position acknowledge message by STP to HLR.

Step 610:HLR inserts the user data of terminal called to MSC C.

Step 611:HLR sends the position to MSC C and upgrades the message of accepting.

Step 612:MSC C sends to the TMSI that terminal called distributes to inserting side, the NRI among the TMSI of this distribution can be in MSC POOL unique identification MSC C.

Step 613:MSC C comprises IMSI, LAI and User Status etc. to the user data of MSC B transmission terminal called, is used for backing up user data at MSC B.

Step 614:HLR sends PRN message to STP, and purpose is that MSC C gets the MSRN of corresponding terminal called, and STP sends to MSC C by the high priority route with this PRN message.

Step 615:MSC C is that terminal called distributes MSRN, and the MSRN that distributes is carried in the PRN response message, sends to HLR.

In second kind of MSC POOL of the embodiment of the invention in first kind of preferred embodiment of method of called recovery, called recovery is realized on HLR, the MSC notice HLR that receives the terminal called page response resends PRN message, so HLR sends PRN message to the MSC that receives the terminal called page response again, the MSC that receives the terminal called page response returns the PRN response message that carries terminal called MSRN to HLR again, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realizes that this terminal makes the access success when called for the first time.

Fig. 7 is second kind of preferred embodiment flow chart of method of called recovery among second kind of MSC POOL of the embodiment of the invention.

The application scenarios of supposing this preferred embodiment is: the main of terminal called is MSC A with MSC; The MSC of centralized backup is MSC B; The MSC that receives the terminal called page response is MSC C; This method realizes on STP.

Flow process shown in Figure 7 comprises:

Step 701:HLR sends PRN message to STP, and it is the MSRN that terminal called distributes that purpose is to obtain MSC A, and STP is determined to the high priority routing failure of MSC A, stores this PRN message.

Step 702～step 705 is identical with step 602～step 605.

After step 706:STP receives the position updating request of MSC C transmission, determine to carry in this position updating request the particular extension cell, STP sends to HLR with position updating request after this cell is deleted from position updating request, the PRN message with storage sends to MSC C again.

Step 707:MSC C is that terminal called distributes MSRN, and MSRN is carried in the PRN response message sends to HLR.

In second kind of MSC POOL of the embodiment of the invention in second kind of preferred embodiment of method of called recovery, called recovery is realized on STP, STP storage HLR is to the PRN message of the backup MSC transmission of terminal called, the MSC notice that receives the terminal called page response resends PRN message, so STP sends the PRN message of storage to the MSC that receives the terminal called page response, the MSC that receives the terminal called page response returns the PRN response message that carries terminal called MSRN to HLR again, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realizes that this terminal makes the access success when called for the first time.

Secondly, introduce the device of called recovery among the embodiment of the invention MSC POOL, comprising: two kinds of MSC, a kind of HLR and a kind of STP.

Fig. 8 is the MSC structural representation among first kind of MSC POOL of the embodiment of the invention, and this MSC comprises:

Processing module, the MSC that is used to obtain reception terminal called page response is the MSRN that terminal called distributes after HLR carries out the position renewal.

MSC among first kind of MSC POOL that the embodiment of the invention provides, obtaining the MSC that receives the terminal called page response is the MSRN that terminal called distributes, and with the MSRN of described terminal called, be carried in the PRN response message and send to HLR, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realize that this terminal makes the access success when called for the first time, save terminal under the fault MSC and done when called, realized the required time of access success.

Among first kind of MSC that the invention described above embodiment provides, this MSC can receive the MSC of terminal called page response exactly, and in this case, processing module can comprise: receiver module, distribution module and acquisition module.

Receiver module is used to receive the page response of terminal called.

Processing module is used to terminal called to distribute MSRN.

Acquisition module, being used to obtain described processing module is the MSRN that terminal called distributes.

Among first kind of MSC that the invention described above embodiment provides, this MSC also can not be the MSC that receives the terminal called page response, and in this case, processing module comprises: receiver module, redirection module and acquisition module.

Receiver module is used to receive the terminal called page response; Receive the private message of the MSC transmission of described reception terminal called page response, the MSC that carries described reception terminal called page response in the described private message is the MSRN that terminal called distributes.

Redirection module is used for according to the load balancing algorithm, and the terminal called page response with described receiver module receives is redirected to other MSC among the MSC POOL, and described other MSC are as the MSC that receives the terminal called page response.

Acquisition module is used for the private message that receives from described receiver module, and the MSC that obtains described reception terminal called page response is the MSRN that terminal called distributes.

Fig. 9 is the MSC structural representation among second kind of MSC POOL of the embodiment of the invention, and this MSC comprises:

Processing module is used to receive the terminal called page response; When HLR carried out the position renewal, notice resend PRN message by STP; For terminal called distributes MSRN.

MSC among second kind of MSC POOL of the embodiment of the invention, carry out the position when upgrading by STP to HLR, notice resends PRN message, promptly notify to the MSC that receives the terminal called page response and resend PRN message, thereby HLR can be from the MSC that receives the terminal called page response, be retrieved as the newly assigned MSRN of terminal called, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realize that this terminal makes the access success when called for the first time, saved terminal under the fault MSC and done when called, realize the required time of access success.

MSC among second kind of MSC POOL of the invention described above embodiment, processing module comprises: cell expansion module and processing execution module.

Described cell expansion module is used to described processing execution module to provide indication to resend the particular extension cell of PRN message.

Described processing execution module is used to receive the terminal called page response; When HLR carried out the position renewal, the particular extension cell that described cell expansion module is provided was carried in the position updating request by STP, and notice resends PRN message; For terminal called distributes MSRN.

Figure 10 is the HLR structural representation among the embodiment of the invention MSC POOL, and this HLR comprises:

Location update processing module, the MSC that is used for resolving reception terminal called page response is in the position updating request that sends, and the indication of carrying resends the particular extension cell of PRN message.

The PRN message processing module, be used for according to the analysis result of described location update processing module described particular extension cell, dismounting sends to the PRN message on the backup MSC of terminal called, and by STP to the described MSC that receives the terminal called page response, resend PRN message; Receive the PRN response message that the MSC of described reception terminal called page response returns, obtain the MSRN that distributes for terminal called that carries in the described PRN response message.

HLR among the embodiment of the invention MSC POOL, resolve the particular extension cell that MSC carries in the position is upgraded, by parsing to this particular extension cell, dismounting sends to the PRN message on the backup MSC of terminal called, and to the MSC that receives the terminal called page response, resend PRN, thereby be implemented on the MSC after the terminal called position is upgraded and obtain MSRN, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realizes that this terminal makes the access success when called for the first time, save under the fault MSC terminal when called, realized the required time of access success.

Figure 11 is the structural representation of the STP among the embodiment of the invention MSC POOL, and this STP comprises:

Parsing module, the MSC that is used for resolving reception terminal called page response is in the position updating request that sends, and the indication of carrying resends the particular extension cell of PRN message.

STP among the embodiment of the invention MSC POOL, storage HLR is to the PRN message of the backup MSC transmission of terminal called, when receiving the position updating request of the MSC transmission that receives the terminal called page response, resolve the particular extension cell that carries in the position updating request, know and to resend PRN message, the PRN message of storage is sent to the MSC that receives the terminal called page response, thereby be implemented on the MSC after the terminal called position is upgraded and obtain MSRN, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realize that this terminal makes the access success when called for the first time, save under the fault MSC terminal when called, realized the required time of access success.

At last, introduce two kinds of systems of called recovery among the embodiment of the invention MSC POOL.

The system of called recovery among first kind of MSC POOL of the embodiment of the invention comprises:

The backup MSC of terminal called, the MSC that is used to obtain reception terminal called page response is the MSRN that terminal called distributes carry out the position renewal to HLR after, described MSRN is carried in the PRN response message send to HLR.

The system of called recovery among first kind of MSC POOL of the embodiment of the invention, it is the MSRN that terminal called distributes that the backup MSC of terminal called is obtained the MSC that receives the terminal called page response, and with the MSRN of described terminal called, be carried in the PRN response message and send to HLR, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realize that this terminal makes the access success when called for the first time, save terminal under the fault MSC and done when called, realized the required time of access success.

First kind of MSC that the embodiment of the invention provides can be used as the better embodiment of the backup MSC of above-mentioned terminal called.In the said system, the backup MSC of terminal called can be identical with the MSC that receives the terminal called page response, also can be inequality.

The system of called recovery among second kind of MSC POOL of the embodiment of the invention comprises:

Receive the MSC of terminal called page response, be used for by STP when HLR carries out the position renewal, notice resends PRN message; The PRN message that reception resends will be carried at for the MSRN that terminal called distributes in the PRN response message, send to HLR.

STP when being used for upgrading in the position, connects the mutual of the MSC of described reception terminal called page response and described HLR.

HLR is used to receive the PRN response message that carries the MSRN that distributes for terminal called that the MSC of described reception terminal called page response returns.

The system of called recovery among second kind of MSC POOL of the embodiment of the invention, carry out the position when upgrading at the MSC that receives the terminal called page response to HLR, notice resends PRN message, promptly notify to the MSC that receives the terminal called page response and resend PRN message, thereby HLR can be from the MSC that receives the terminal called page response, be retrieved as the newly assigned MSRN of terminal called, realized the terminal under the fault MSC, for the first time doing when called, HLR just can obtain the MSRN of terminal called, thereby realize that this terminal makes the access success when called for the first time, saved terminal under the fault MSC and done when called, realize the required time of access success.

The PRN message that resends that the MSC of above-mentioned reception terminal called page response receives can be sent by described HLR; Also can send the PRN message that this resends, the PRN message that sends to the backup MSC of terminal called for the HLR of described STP storage by described STP.

Second kind of MSC that the invention process provides can be used as the better embodiment of the MSC of above-mentioned reception terminal called page response; The STP that the embodiment of the invention provides can be used as the better embodiment of STP in the said system; The HLR that the embodiment of the invention provides can be used as the better embodiment of the HLR in the said system.

In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the method for called recovery in the mobile switching centre pond is characterized in that this method comprises:

The backup mobile switching centre of terminal called receives the PRN message that Provides Roaming Number that attaching position register sends;

The backup mobile switching centre of terminal called, the mobile switching centre that obtains reception terminal called page response is the roaming number MSRN that terminal called distributes carry out the position renewal to attaching position register after;

The backup mobile switching centre of terminal called with the MSRN of described terminal called, is carried in the PRN response message and sends to attaching position register.

2. the method for claim 1 is characterized in that, the backup mobile switching centre of described terminal called is centralized backup mobile switching centre; The MSRN that the backup mobile switching centre of described terminal called is retrieved as the terminal called distribution is:

Receive the private message of mobile switching centre's transmission of described reception terminal called page response, the mobile switching centre of carrying described reception terminal called page response in the described private message is the MSRN that terminal called distributes.

3. the method for claim 1 is characterized in that, the Non-Access Stratum node is selected the IDNNS cell between the territory in the described page response, and what comprise the terminal called correspondence is main with temporary mobile subscriber identity TMSI that MSC distributed;

The MSRN that the backup mobile switching centre of described terminal called is retrieved as the terminal called distribution is:

Receive the mobile switching centre of described paging receiving response, according to the TMSI that comprises in the described page response, find the private message that sends after the backup mobile switching centre of terminal called, the mobile switching centre of carrying described paging receiving response in the described private message is the MSRN that terminal called distributes.

4. the method for claim 1 is characterized in that, the IDNNS cell in the described page response comprises the international mobile subscriber identity IMSI of terminal called;

The MSRN that the backup mobile switching centre of described terminal called is retrieved as the terminal called distribution further comprises before:

Access Network RAN is according to the IMSI in the page response, search the corresponding relation of described IMSI and mobile switching centre, determine the backup mobile switching centre of terminal called, the page response of terminal called is sent to the backup mobile switching centre of terminal called, and the backup mobile switching centre of described terminal called is as the mobile switching centre that receives the terminal called page response;

The MSRN that the backup mobile switching centre of described terminal called is retrieved as the terminal called distribution is: the backup mobile switching centre of described terminal called is obtained from the MSRN that distributes as terminal called.

5. the method for claim 1 is characterized in that, the IDNNS cell in the described page response comprises the IMSI of terminal called;

RAN searches the corresponding relation of described IMSI and mobile switching centre according to the IMSI in the page response, determines the backup mobile switching centre of terminal called, the terminal called page response is sent to the backup mobile switching centre of terminal called;

The backup mobile switching centre of terminal called, according to the load balancing algorithm, described page-response message is redirected other mobile switching centres that send in the mobile switching centre pond, and described other mobile switching centres are as the mobile switching centre that receives the terminal called page response;

The MSRN that the backup mobile switching centre of described terminal called is retrieved as the terminal called distribution is: the backup mobile switching centre of terminal called, receive the private message of mobile switching centre's transmission of described reception terminal called page response, the mobile switching centre of carrying described reception terminal called page response in the described private message is the MSRN that terminal called distributes.

6. the method for called recovery in the mobile switching centre pond is characterized in that this method comprises:

Receive the mobile switching centre of terminal called page response, when attaching position register carried out the position renewal, notice resend PRN message by Signalling Transfer Point;

Receive the mobile switching centre of terminal called page response, receive the PRN message that resends;

Receive the mobile switching centre of terminal called page response, the MSRN that will distribute for terminal called is carried in the PRN response message and sends to attaching position register.

7. method as claimed in claim 6 is characterized in that, the mobile switching centre of described reception terminal called page response, and notice resends PRN message and is:

Receive the mobile switching centre of terminal called page response, by Signalling Transfer Point in the position updating request that attaching position register sends, carry the particular extension cell that indication resends PRN message.

8. method as claimed in claim 7 is characterized in that, described particular extension cell is:

In the extension container field of location update request message, fill in the content that indication resends PRN message, form described particular extension cell.

9. method as claimed in claim 7 is characterized in that, described reception further comprises before resending PRN message: after attaching position register receives described position updating request, resolve described particular extension cell;

The mobile switching centre of described reception terminal called page response, receiving the PRN message that resends is that attaching position register resends by Signalling Transfer Point.

10. method as claimed in claim 7 is characterized in that, describedly comprises to the position updating request that attaching position register sends by Signalling Transfer Point:

Signalling Transfer Point is resolved the described particular extension cell in the described position updating request, and the position updating request behind this particular extension cell of deletion is sent to attaching position register;

The described mobile switching centre that receives the terminal called page response, the PRN message that reception resends is: receive the PRN message that Signalling Transfer Point sends, described PRN message is the PRN message of the attaching position register of Signalling Transfer Point storage to the backup mobile switching centre transmission of terminal called.

11. the mobile switching centre in the mobile switching centre pond is characterized in that this mobile switching centre comprises:

Processing module, the mobile switching centre that is used to obtain reception terminal called page response is the MSRN that terminal called distributes after attaching position register carries out the position renewal;

Sending module is used for the MSRN with the terminal called of described processing module, is carried in the PRN response message and sends to attaching position register.

12. mobile switching centre as claimed in claim 11 is characterized in that, this mobile switching centre is the mobile switching centre that receives the terminal called page response;

Described processing module comprises: receiver module, distribution module and acquisition module;

Described receiver module is used to receive the page response of terminal called;

Described processing module is used to terminal called to distribute MSRN;

Described acquisition module, being used to obtain described processing module is the MSRN that terminal called distributes.

13. MSC as claimed in claim 11 is characterized in that, described processing module comprises: receiver module, redirection module and acquisition module;

Described receiver module is used to receive the terminal called page response; Receive the private message of mobile switching centre's transmission of described reception terminal called page response, the mobile switching centre of carrying described reception terminal called page response in the described private message is the MSRN that terminal called distributes;

Described redirection module, be used for according to the load balancing algorithm, terminal called page response with described receiver module receives is redirected to other mobile switching centres in the mobile switching centre pond, and described other mobile switching centres are as the mobile switching centre that receives the terminal called page response;

Described acquisition module is used for the private message that receives from described receiver module, and the mobile switching centre that obtains described reception terminal called page response is the MSRN that terminal called distributes.

14. the mobile switching centre in the mobile switching centre pond is characterized in that this mobile switching centre comprises:

Processing module is used to receive the terminal called page response; When attaching position register carried out the position renewal, notice resend PRN message by Signalling Transfer Point; For terminal called distributes MSRN;

Transceiver module is used to receive the PRN message that resends; With described processing module is the MSRN that terminal called distributes, and is carried in the PRN response message to send to attaching position register.

15. mobile switching centre as claimed in claim 14 is characterized in that, described processing module comprises: cell expansion module and processing execution module;

Described cell expansion module is used to described processing execution module to provide indication to resend the particular extension cell of PRN message;

Described processing execution module is used to receive the terminal called page response; When attaching position register carried out the position renewal, the particular extension cell that described cell expansion module is provided was carried in the position updating request by Signalling Transfer Point, and notice resends PRN message; For terminal called distributes MSRN.

16. the attaching position register in the mobile switching centre pond is characterized in that this attaching position register comprises:

Location update processing module, the mobile switching centre that is used for resolving reception terminal called page response is in the position updating request that sends, and the indication of carrying resends the particular extension cell of PRN message;

The PRN message processing module, be used for according to the analysis result of described location update processing module described particular extension cell, dismounting sends to the PRN message in the backup mobile switching centre of terminal called, and, resend PRN message by the mobile switching centre of Signalling Transfer Point to described reception terminal called page response; Receive the PRN response message that the mobile switching centre of described reception terminal called page response returns, obtain the MSRN that distributes for terminal called that carries in the described PRN response message.

17. the Signalling Transfer Point in the mobile switching centre pond is characterized in that this Signalling Transfer Point comprises:

Parsing module, the mobile switching centre that is used for resolving reception terminal called page response is in the position updating request that sends, and the indication of carrying resends the particular extension cell of PRN message;

The PRN message processing module is used to receive PRN message and the storage that attaching position register sends to the backup mobile switching centre of terminal called; According to the analysis result of described parsing module, the position updating request of deleting described particular extension cell is sent to attaching position register to described particular extension cell; The PRN message of described storage is sent to the mobile switching centre that receives the terminal called page response.

18. the system of called recovery in the mobile switching centre pond is characterized in that this system comprises:

The backup mobile switching centre of terminal called, be used to obtain the mobile switching centre of reception terminal called page response carry out the position renewal to attaching position register after, be the MSRN that terminal called distributes, described MSRN is carried in the PRN response message sends to attaching position register;

Receive the mobile switching centre of terminal called page response, be used to receive the page response of terminal called, for terminal called distributes MSRN.

19. system as claimed in claim 18, it is characterized in that, the backup mobile switching centre of described terminal called is identical mobile switching centre with the mobile switching centre of described reception terminal called page response, comprising: receiver module, distribution module and acquisition module;

Described processing module is used to terminal called to distribute MSRN;

20. system as claimed in claim 18 is characterized in that, the backup mobile switching centre of described terminal called is different mobile switching centres with the mobile switching centre of described reception terminal called page response; The backup mobile switching centre of described terminal called comprises: receiver module, redirection module and acquisition module;

21. the system of called recovery in the mobile switching centre pond is characterized in that this system comprises:

Receive the mobile switching centre of terminal called page response, be used for by Signalling Transfer Point when attaching position register carries out the position renewal, notice resends PRN message; The PRN message that reception resends will be carried at for the MSRN that terminal called distributes in the PRN response message, send to attaching position register;

Signalling Transfer Point when being used for upgrading in the position, connects the mutual of the mobile switching centre of described reception terminal called page response and described attaching position register;

Attaching position register is used to receive the PRN response message that carries the MSRN that distributes for terminal called that the mobile switching centre of described reception terminal called page response returns, and obtains described MSRN for the terminal called distribution.

22. system as claimed in claim 21 is characterized in that, the PRN message that resends that the mobile switching centre of described reception terminal called page response receives is sent by described attaching position register.

23. system as claimed in claim 21, it is characterized in that, the PRN message that resends that the mobile switching centre of described reception terminal called page response receives, send by described Signalling Transfer Point, the described PRN message that resends, the PRN message that sends to the backup mobile switching centre of terminal called for the attaching position register of described Signalling Transfer Point storage.