CN101742590A

CN101742590A - Method and device for establishing connection with MSC

Info

Publication number: CN101742590A
Application number: CN200810180624A
Authority: CN
Inventors: 胡伟华; 陈中平; 周汉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-11-18
Filing date: 2008-11-18
Publication date: 2010-06-16
Anticipated expiration: 2028-11-18
Also published as: CN101742590B

Abstract

The embodiment of the invention discloses a method and device for establishing connection with MSC. The method comprises the following steps: when the terminal is switched from a first network to a second network, a second network entity in the second network acquires the information of a first MSC of the terminal in the first network, wherein the first network is connected with the first MSC; and the second network entity establishes the connection with the first MSC according to the acquired information of the first MSC. The technical scheme of the embodiment of the invention ensures that the connected MSC can continue providing services for two networks, thereby continuously providing services for users and enhancing stability of the services of users.

Description

A kind of method and apparatus that connects with MSC

Technical field

The present invention relates to communication technical field, particularly relate to a kind of method and apparatus that connects with MSC (Mobile SwitchCenter, mobile switching centre).

Background technology

At GPRS (Genreral Packet Radio Service, GPRS)/UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system) with CS (Circuit Switched, circuit switching) packet network of Gong Cun evolution (evolved packet system, EPS) in the framework, because existing a lot of business all operate in the circuit domain of GPRS/UMTS, in order in EPS, to reuse existing C S business, proposed to be connected to the method for CS domain core net by the EPS network, MME in the EPS network (Mobility Management Entity, mobile management entity) is connected on the MSC of traditional C core net by a SGs interface.

Under this framework, when UE (User Equipment, subscriber equipment) the preparation initiation CS beginning exhaled (MO, Mobile Originating) professional, UE need forward the GPRS/UMTS network earlier to, selects the sub-district of a 2G/3G to be stationed, and then carries out the MO business.When receiving, MSC exhales (MT an end, when MobileTerminated) professional, MSC sends beep-page message by the SGs interface to MME, MME carries out paging by the EPS network to UE, after UE receives this beep-page message, need forward the GPRS/UMTS network earlier to, select the sub-district of a 2G/3G to be stationed, and then finish the subsequent treatment of this MT business.Therefore, this framework and processing method can be called " CS fallback " (the CS business is returned legacy network and handled).

A demand of evolvement network is to realize that Idle mode signalling reduction (also is referred to as saving signaling or limitation signaling under the idle pulley, be called for short ISR) function, it mainly is the mobile management flow process of UE between different access networks that reduces under the idle pulley, as, reduce GERAN (GSM EDGERadio Access Network, the gsm wireless Access Network of evolution)/UTRAN (UMTS TerritorialRadio Access Network, UMTS Terrestrial radio access network) and the Inter3GPP Access System Mobility in Idle State between the EUTRAN (Evolved UMTSTerritorial Radio Access Network, the UMTS Terrestrial radio access network of evolution) handle.The solution of the Idlemode signalling reduction mechanism between the 3GPP access network is two login mechanisms at present, be that UE registers at two different access networks, UE under the idle pulley will not trigger Inter 3GPP Access System Mobility flow process when mobile between these two access networks like this, as, inter-system RAU/TAU flow process.

In the LTE network, when combined registering of UE initiation or associated update flow process, if MME supports the SGs interface, MME can be established to the connection of MSC for UE in described flow process.

In the GERAN/UTRAN network, when UE initiates a combined registering or associated update flow process, if SGSN (Serving GPRS Support Node, Serving GPRS Support Node) supports Gs interface, SGSN can be established to the connection of MSC for UE in described flow process.

Present mechanism is thought, for supporting SGs interface MSC, can keep the SGs interface to connect simultaneously and be connected with Gs interface.UE for the ISR activation, if all carried out combined registering or renewal at LTE network and GERAN/UTRAN network, and set up the MME of ISR association and SGSN and same MSC and link together this moment, in the time of called service, MSC can trigger MME paging UE by the SGs interface, also can trigger SGSN paging UE or trigger BSS (BaseStation Subsystem simultaneously by Gs interface by the A/Iu-cs interface, base station sub-system)/RNS (Radio Network Subsystem, RNS) paging UE.

For the UE that ISR activates, network side does not also know that it still is that the above treatment mechanism can guarantee paging to the UE that is in Idle state in the GERAN/UTRAN network that UE resides in the LTE network on earth, for the user provides reliable professional the guarantee.

In realizing process of the present invention, the inventor finds that there is following problem at least in prior art:

UE for the ISR activation, if being connected MSC in other words with different MSC, the MME that sets up the ISR association and SGSN only kept the SGs interface to connect or Gs in connecting, so as called service, the MSC of the current registration of UE can only be in an active block paging UE, may paging arrive UE this moment, and business also can't normally be carried out like this.

Summary of the invention

The embodiment of the invention provides a kind of method and apparatus that connects with MSC, when being used to be implemented in the switching of terminal generation network, network entity in two networks is connected in same MSC, to guarantee to continue to provide service for two kinds of networks, thereby ensure continuation, improve the stability of customer service for service that the user provides.

For achieving the above object, the embodiment of the invention proposes a kind of method that connects with MSC on the one hand, comprising:

When terminal switches to second network by first network, second network entity that is arranged in described second network obtains the information of described terminal at the pairing MSC of described first network, wherein, a described MSC is connected with first network entity in first network;

Described second network entity connects with a described MSC according to the information of a described MSC who gets access to.

On the other hand, the embodiment of the invention also proposes a kind of network entity, is positioned at second network, comprising:

Acquisition module is used for obtaining the information of described terminal pairing MSC in described first network when terminal switches to second network by first network, and wherein, a described MSC is connected with first network entity in first network;

Link block is used for the information according to the accessed described MSC of described acquisition module, connects with a described MSC.

The technical scheme of the embodiment of the invention has the following advantages, because adopted the method and apparatus that the network entity in two kinds of networks is all connected with same MSC, thereby, assurance can continue to provide service for two kinds of networks, reach the continuation that ensures to service that the user provides, improved the effect of the stability of customer service.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

The schematic flow sheet of the method that Fig. 1 connects for a kind of and MSC in the embodiment of the invention one;

Fig. 2 is the structural representation of a kind of network entity in the embodiment of the invention two;

The schematic flow sheet of the method that Fig. 3 connects for a kind of and MSC in the embodiment of the invention three;

The schematic flow sheet of the method that Fig. 4 connects for a kind of and MSC in the embodiment of the invention four;

The schematic flow sheet of the method that Fig. 5 connects for a kind of and MSC in the embodiment of the invention five;

The schematic flow sheet of the method that Fig. 6 connects for a kind of and MSC in the embodiment of the invention six;

The schematic flow sheet of the method that Fig. 7 connects for a kind of and MSC in the embodiment of the invention seven;

The schematic flow sheet of the method that Fig. 8 connects for a kind of and MSC in the embodiment of the invention eight;

The schematic flow sheet of the method that Fig. 9 connects for a kind of and MSC in the embodiment of the invention nine;

The schematic flow sheet of the method that Figure 10 connects for a kind of and MSC in the embodiment of the invention ten.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

As shown in Figure 1, the schematic flow sheet of the method that a kind of and MSC that provides for the embodiment of the invention one connects, this method comprises:

Step S101, when terminal switches to second network by first network, second network entity obtains the information of terminal pairing MSC in first network.

Wherein, second network entity is arranged in second network, and a MSC is connected with first network entity in first network.

Concrete, second network entity obtains the operation of terminal information of a pairing MSC in first network, specifically comprises following three kinds of modes:

The information of the MSC that mode one, the second network entity receiving terminal report.

Mode two, second network entity send query messages to first network entity, and receive the information of the MSC that first network entity returns.

Mode three, second network entity receive the information that first network entity sends a MSC.

Wherein, the information of a MSC specifically can be carried by message such as RELOCATION REQUEST message, context response information by first network entity and be sent.

Further, before second network entity receives RELOCATION REQUEST message, also comprise:

First network entity receives the handoff request that source eNodeB sends;

First network entity sends the RELOCATION REQUEST message of the information that comprises a MSC to second network entity.

The information of the MSC that step S102, second network entity basis get access to connects with a MSC.

Concrete, the realization of this step comprises following flow process:

According to the information of a MSC who gets access to, second network entity judges whether a MSC can be Terminal Service at second network.

When a MSC can be when second network be Terminal Service, second network entity and a MSC connect.

When a MSC cannot be when second network be Terminal Service, it can be that the 2nd MSC of Terminal Service connects at second network that second network entity is selected, and first network entity and the 2nd MSC are connected.

Wherein, first network entity is arranged in first network.

In this step, it can be after the 2nd MSC of Terminal Service connects at second network that second network entity is selected, and the operation with first network entity and the 2nd MSC connect specifically comprises following three kinds of modes:

Mode one, trigger the tracing section updating flow process by terminal, first network entity and the 2nd MSC are connected, idiographic flow is as follows:

1, second network entity sends the message of carrying indication information to terminal.

Wherein, when the effect of this indication information is to make terminal to return first network, trigger the tracing section updating flow process, first network entity and the 2nd MSC are connected.

2, when terminal is returned first network, terminal triggers the tracing section updating flow process according to above-mentioned indication information, sends the tracing section updating request to first network entity.

Wherein, this tracing section updating request specifically comprises two kinds of situations:

(1) terminal sends the message of the information that comprises the 2nd MSC to first network entity.

(2) terminal sends to first network entity and comprises the message of triggering sign from the information of the 2nd MSC to second network entity that obtain.

Wherein, triggering sign is a kind of special cell or indication, make the entity that receives this triggering sign carry out corresponding handling process, this triggering sign can be preset in entity that intercoms mutually or network, and the concrete setting means embodiment of the invention is not done qualification.

3, first network entity connects with the 2nd MSC according to the tracing section updating request.

Two kinds of corresponding above-mentioned tracing section updating requests, the flow process that first network entity and the 2nd MSC connect also comprises two kinds of situations accordingly:

(1) first network entity connects with the 2nd MSC according to the information of the 2nd MSC of terminal transmission.

(2) first network entities are according to triggering sign, obtain the information of the 2nd MSC to second network entity, and according to the information of the 2nd MSC, connect with the 2nd MSC.

Mode two, send the information of the 2nd MSC by second network entity to first network entity, trigger first network entity and the 2nd MSC connects, idiographic flow is as follows:

1, second network entity sends the message of the information that comprises the 2nd MSC to first network entity.

Wherein, comprise the message of the information of the 2nd MSC, specifically by context acknowledgement message, or location update message sends.

2, first network entity connects according to information and the 2nd MSC of the 2nd MSC.

Wherein, comprise in the message of information of the 2nd MSC and also further comprise LAI (Location AreaIdentity location area), or, default reason mark.

Further, when also comprising LAI in the message that sends the information that comprises the 2nd MSC to first network entity, first network entity connects with the 2nd MSC according to information and the LAI of the 2nd MSC;

When also comprising default reason mark in the message that sends the information that comprises the 2nd MSC to first network entity, first network entity sends the message that comprises default reason mark to the 2nd MSC, the 2nd MSC connects with first network entity according to default reason mark.

Further again, when terminal is moved in second network, when causing the 2nd MSC to switch to the 3rd MSC, this method also comprises following handling process:

Second network entity and the 3rd MSC connect;

Second network entity sends the message of the information comprise the 3rd MSC to first network entity, and first network entity connects according to information and the 3rd MSC of the 3rd MSC.

Mode the three, the 2nd MSC receives the information of first network entity of second network entity transmission, the processing that active is initiated and first network entity connects, and idiographic flow is as follows:

The 2nd MSC receives the message of the information that comprises first network entity of second network entity transmission;

The 2nd MSC judges whether to connect with first network entity according to the information of first network entity;

When the 2nd MSC judges when not connecting with first network entity, the 2nd MSC sends the message of the information that comprises the 2nd MSC to first network entity, connects with first network entity.

Further, when terminal is moved in second network, when causing the 2nd MSC to switch to the 3rd MSC, this method also comprises following handling process:

The 3rd MSC and second network entity connect;

The 3rd MSC receives the message of the information that comprises first network entity of second network entity transmission;

The 3rd MSC judges whether to connect with first network entity according to the information of first network entity;

When the 3rd MSC judges when not connecting with first network entity, the 3rd MSC sends the message of the information that comprises the 3rd MSC to first network entity, connects with first network entity.

Need be pointed out that further that the information of the first mentioned network entity is specially the address information or the identification information of first network entity in preamble;

And a mentioned MSC, the 2nd MSC or the information of the 3rd MSC in preamble specifically comprise:

The address information of the one MSC, the 2nd MSC or the 3rd MSC; Or,

Sequence number or the identification information of the one MSC, the 2nd MSC or the 3rd MSC; Or,

The one MSC, the 2nd MSC or the 3rd MSC distribute to the LAI information of terminal; Or,

The one MSC, the 2nd MSC or the 3rd MSC distribute to the LAI information and the TMSI information of terminal.

And when the information of a MSC, the 2nd MSC or the 3rd MSC is a MSC, the 2nd MSC or the 3rd MSC when distributing to the LAI information of terminal, this method also comprises:

Second network entity carries out addressing according to LAI information to a MSC, the 2nd MSC or the 3rd MSC, obtains the address information of a MSC, the 2nd MSC or the 3rd MSC;

When the information of a MSC, the 2nd MSC or the 3rd MSC is a MSC, the 2nd MSC or the 3rd MSC when distributing to the LAI information of terminal and TMSI information, this method also comprises:

Second network entity carries out addressing according to LAI information and TMSI information to a MSC, the 2nd MSC or the 3rd MSC, obtains the address information of a MSC, the 2nd MSC or the 3rd MSC.

Wherein, it is pointed out that above-mentioned LAI information can directly obtain, also can be to extract from RAI information.

Concrete, comprising LAC information in the coding structure of RAI, the composition structural representation of RAI information is as follows:

RAI＝MCC+MNC+LAC+RAC，

Further, the composition structural representation of LAI information is:

LAI＝MCC+MNC+LAC，

Based on the composition structure of above-mentioned LAI and RAI information as can be seen; each composition information of LAI information all is contained in the RAI information; can be by in RAI information, extracting the extraction that corresponding information realizes LAI information; so comprise equally in the technical scheme that the embodiment of the invention proposed RAI be provided information; extract the technical scheme of LAI information then from RAI information, such variation does not influence protection scope of the present invention.

The explanation of above-mentioned relation about RAI and LAI is equally applicable to the technical scheme that subsequent embodiment of the present invention proposes, and this point all is consistent in the respective embodiments below, repeated description no longer among the follow-up embodiment of the present invention.

The corresponding above-mentioned embodiment of the invention one method that connects with MSC that proposed, as shown in Figure 2, the structural representation of a kind of network entity that provides for the embodiment of the invention two, this network entity specifically comprises:

Acquisition module 1 is used for obtaining the information of terminal pairing MSC in first network when terminal switches to second network by first network, and wherein, first network is connected with a MSC.

Further, the corresponding aforementioned embodiment of the invention more than one methods that connect with MSC that propose, this acquisition module 1 specifically can be divided into following three kinds of structures according to the mode difference of obtaining information:

Structure one, comprise and receive submodule 11, be used for the information of the MSC that receiving terminal reports.

Structure two, comprise inquiry submodule 12 and receive submodule 11.

Inquiry submodule 12 is used for sending query messages to first network entity,

Receive submodule 11, be used to receive the information of the MSC that first network entity returns.

Structure three, comprise and receive submodule 11, be used to receive the RELOCATION REQUEST message of the information that comprises a MSC that first network entity sends.

It is to be noted; three kinds of above-mentioned structures are variations of making according to the difference of information obtain manner; but; under concrete enforcement scene; can comprise above-mentioned three kinds of structures in the acquisition module 1 simultaneously; perhaps only comprise one or more structures wherein, such variation does not influence protection scope of the present invention.

Link block 2 is used for the information according to the accessed MSC of acquisition module 1, connects with a MSC.

Further, in the network entity that present embodiment proposed, also comprise:

Judge module 3 is used for the information of the MSC that gets access to according to acquisition module 1, judges whether a MSC can be Terminal Service at second network.

In the case, link block 2 also is used for judging that when judge module 3 MSC can connect with a MSC when second network is Terminal Service; Or be used for judging that when judge module 3 MSC cannot be when second network be Terminal Service that selection can be that the 2nd MSC of Terminal Service connects at second network, and first network entity and the 2nd MSC are connected.

Wherein, first network entity is arranged in first network.

Further, the corresponding aforementioned embodiment of the invention more than one methods that connect with MSC that propose, this link block 2 specifically can be divided into following three kinds of structures according to connecting the mode difference:

Structure one, comprise connexon module 21 and send submodule 22, wherein:

Connexon module 21 is used for and can be that the 2nd MSC of Terminal Service connects at second network;

Send submodule 22, be used for sending the message of carrying indication information, when indication information makes terminal return first network, trigger the tracing section updating flow process, first network entity is connected with the 2nd MSC that connexon module 31 is connected to terminal.

Structure two, comprise connexon module 21 and send submodule 22, in this structure:

Send submodule 22, be used for sending to first network entity message of the information that comprises the 2nd MSC that connexon module 31 connected, first network entity connects according to information and the 2nd MSC of the 2nd MSC.

Structure three, only comprise and send submodule 22, be used for sending the message of the information that comprises first network entity, so that the 2nd MSC triggers the flow process that connects with first network entity to the 2nd MSC.

It is to be noted; three kinds of above-mentioned structures are variations of making according to the difference of the mode that connects; but; under concrete enforcement scene; can comprise above-mentioned three kinds of structures in the link block 2 simultaneously; perhaps only comprise one or more structures wherein, such variation does not influence protection scope of the present invention.

Further, this network entity also comprises:

Addressed module 4, when the information that is used for the MSC that obtains when acquisition module is LAI information, according to LAI information, corresponding M SC is carried out addressing, obtain the address information of each corresponding M SC, or, when the information of the MSC that acquisition module obtained is LAI information and TMSI information, according to LAI information and TMSI information, corresponding M SC is carried out addressing, obtain the address information of corresponding M SC.

Above-mentioned module can be distributed in a device, also can be distributed in multiple arrangement.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.

The embodiment of the invention three has proposed a kind of method that connects with MSC, and its purpose is: when ISR activated, the MME and the SGSN that set up the ISR association were connected to same MSC.Its basic thought and key problem in technology point are as follows:

To be moved to SGSN by MME is example, UE initiates joint route and upgrades (RAU), SGSN to MME inquire employed MSC information (as, SGSN inquires about to MME by Context Request message), MME to SGSN provide MSC information (as, MME feeds back to SGSN by ContextResponse message).

Wherein, the MSC information that provides can be the MSC address information, also can be sequence number or identification information, or MSC distributes to the LAI information of UE, or MSC distributes to LAI information and the TMSI information of UE.

In addition, the information of MSC also can be provided by UE, and UE gives SGSN with above-mentioned MSC information band in registration message, and for example, UE carries LAI information and TMSI information in RAU Request message, send to SGSN.

SGSN obtains the employed MSC of MME address, if this MSC can continue as UE service is provided, SGSN just selects therewith that MSC connects so, and promptly MME and SGSN are connected to same MSC, make UE be connected to same MSC in setting up two networks of ISR association.

As shown in Figure 3, by example three of the present invention the schematic flow sheet of a kind of method that connects with MSC of proposition, this method specifically may further comprise the steps:

A, attachment flow

Step S301, UE are attached to MME.

By attachment flow, UE successfully is attached on the MME.

UE indicates CS fallback indicator in Attach Request Attach Request message, MME also needs UE is registered to MSC1.This moment, MME and MSC1 connected.

B, ISR activation process

Step S302, UE send the routing update request to SGSN.

UE moves under the SGSN, initiates joint route and upgrades, and sends routing update request RoutingArea Update Request message to SGSN.

The processing that follow this moment has, and carries the information of MSC and give SGSN in the routing update request message.

It is pointed out that the information that provides can be the MSC address information, also can be sequence number or identification information, or MSC distributes to the LAI information of UE, or MSC distributes to LAI information and the TMSI information of UE.(SGSN utilizes LAI information, or the LAI information MSC that addressing need be connected with TMSI information).

Step S303, SGSN send context request Context Request message to MME, require to obtain the context that the user preserves on MME.

Wherein, the processing of the employed MSC address information of acquisition MME has two kinds of methods:

1) in step S302, UE initiatively reports the address information of MSC to give SGSN (also can be sequence number or the identification information of MSC, or MSC distributes to the LAI information of UE, or MSC distributing to LAI information and the TMSI information of UE);

2) if the associated update that UE initiates, promptly SGSN need connect with certain MSC, SGSN carries the MSC address information that cell inquiry MME preserves in message.

Wherein, the cell form can be " MSC needed " etc., and the variation of concrete cell form does not influence protection scope of the present invention.

Step S304, MME return context response Context Response message and give SGSN, carry the ability information that MME supports ISR in the message.

MME provides the address information of MSC to SGSN according to the inquiry of SGSN in Context Response message.

Here the information of MSC is provided also can be initiatively to MME, can't help the paging of SGSN to trigger.The information that provides can be the MSC address information, also can be sequence number or the identification information of MSC, or MSC distributes to the LAI information of UE, or MSC distributes to LAI information and the TMSI information (SGSN utilizes LAI information, or the LAI information MSC that addressing need be connected with TMSI information) of UE.

For other cell or form that can characterize the information of MSC, the embodiment of the invention is not done qualification.

Step S305, SGSN send context and confirm (Context Ack) message to MME, if decision starts ISR, then MME is given in indication in message, and ISR enables.

Step S306, SGSN judge according to the information of the MSC1 that obtains whether MSC1 can serve for UE.

Concrete, SGSN judges whether MSC1 can continue as UE and provide service method as follows:

1) (Access Network can report the UE present position to SGSN according to the current present position of UE, no matter be LAI or extract LAI information from RAI) select MSC, still can be served by MSC1 if find zone, the current present position of UE, so then judged result is for being, otherwise judged result is for denying.

2) (Access Network can report the UE present position to SGSN according to the current present position of UE, no matter be LAI or extract LAI information from RAI) select MSC, for example (use the current present position of UE by configuration or dns resolution, for example, LAI) obtain the MSC tabulation that to serve, MSC1 is if in tabulation, and then judged result is for being, otherwise judged result is not for.

Further, above-mentioned determination methods is equally applicable to MME and judges whether MSC can continue as UE and provide service, no longer repeat specification hereinafter.

When judged result when being, execution in step S307;

When judged result for not the time, then need to be implemented as the flow process that UE selects new MSC, concrete flow process is described in detail in the follow-up embodiment of the invention five, embodiment seven and embodiment nine, no longer explanation in the present embodiment.

It is to be noted; whether the above-mentioned MSC of judgement can continue as UE, and the explanation of the particular content of service method is provided all is consistent in the follow-up embodiment of the present invention; below this is incited somebody to action no longer repeated description, but this does not influence protection scope of the present invention.

Step S307, SGSN send location update request message Location Update Request to MSC1.

SGSN judges that according to the address of the selected MSC1 of MME that obtains provide service if this MSC1 can continue as UE, MSC1 is for connecting therewith for SGSN so, and promptly UE is connected to same MSC in setting up two networks of ISR association.

Step S308, MSC1 send the position renewal to SGSN and accept message (Location UpdateAccept), and this moment, MSC1 guaranteed that SGSN and the MME related with setting up ISR connects.

Step S309, SGSN initiate Routing Area Update to UE and accept message (Routing Area UpdateAccept).

Step S310, UE initiate Routing Area Update to SGSN and finish message (Routing Area UpdateComplete).

The embodiment of the invention four has proposed the method that a kind of and MSC connect, and its purpose is: when switching, set up the MME of ISR association and SGSN and same MSC and connect.Its basic thought and key problem in technology point are as follows:

To be moved to SGSN by MME is example, and source enode Source eNodeB initiates handoff request (Handover Required), and MME provides MSC information (ForwardRelocation Request message) to SGSN.

Wherein, the MSC information that provides can be the MSC address information, also can be sequence number or the identification information of MSC, or MSC distributes to the LAI information of UE, or MSC distributes to LAI information and the TMSI information of UE.

After switching was finished, UE initiated joint route and upgrades (RAU).

In addition, the information of MSC also can be provided by UE, UE in registration message with LAI information, or LAI information and TMSI information band give SGSN (as, UE carries LAI information and TMSI information by RAU Request message, sends to SGSN).

As shown in Figure 4, by example four of the present invention the schematic flow sheet of a kind of method that connects with MSC of proposition, this method specifically may further comprise the steps:

A, attachment flow

Idiographic flow is as described in " attachment flow " in the embodiment of the invention three, and present embodiment is explanation no longer separately.

B, switching flow

Step S402, Source eNodeB initiate handoff request message (HandoverRequired) to MME.

Step S403, MME transmit RELOCATION REQUEST message (Forward Relocation Request) and give SGSN, carry the MSC1 information that is connected with MME and the ability information of MME support ISR simultaneously.

Here MSC1 information can be the MSC address information, also can be sequence number or the identification information of MSC, or MSC distributes to the LAI information of UE, or MSC distributes to LAI information and the TMSI information (SGSN utilizes LAI information, or the LAI information MSC that addressing need be connected with TMSI information) of UE.

Step S404, SGSN transmit relocation response message (Forward Relocation Response) and give MME.

If decision starts ISR, then MME is given in indication in message, and ISR enables.

Step S405, MME transmit reorientation and finish message (Forward Relocation Complete) to SGSN.

Step S406, MME return switching command (HandoverCommand) to Source eNodeB.

Step S407, Source eNodeB notice UE switching is finished.

Send switching command (Handover from E-UTRANCommand) to UE from E-UTRAN

After step S408, switching were finished, UE initiated routing update request message (RoutingArea Update Request) to SGSN.

The processing that follow this moment has, and carries the address information of MSC and give SGSN in the routing update request message.The information that provides can be the MSC address information, also can be sequence number or the identification information of MSC, or MSC distributes to the LAI information of UE, or MSC distributes to LAI information and the TMSI information (SGSN utilizes LAI information, or the LAI information MSC that addressing need be connected with TMSI information) of UE.

Step S409, SGSN judge according to the information of the MSC1 that obtains whether MSC1 can serve for UE.

When judged result when being, execution in step S410;

When judged result for not the time, then need to be implemented as the flow process that UE selects new MSC, concrete flow process is described in detail in the follow-up embodiment of the invention six, embodiment eight and embodiment ten, no longer explanation in the present embodiment.

Step S410, SGSN send location update request message Location Update Request message to MSC1.

SGSN judges that according to the address of the selected MSC1 of MME that obtains (concrete acquisition mode can be that MME provides to SGSN among the step S403, perhaps report to SGSN by UE among the step S408), if this MSC1 can continue as UE service is provided, then SGSN selects this MSC1 to connect, be that MME and SGSN are associated with same MSC1, make UE in setting up two networks of ISR association, be connected to same MSC.

Step S411, MSC1 send the position to SGSN and upgrade acceptance.

This moment, MSC1 guaranteed being connected of SGSN related with setting up ISR and MME simultaneously.

Step S412, SGSN return routing update to UE and accept message.

The embodiment of the invention five has proposed a kind of method that connects with MSC, and its purpose is: when ISR activated, the MME and the SGSN that set up the ISR association were connected to same MSC.This method is the further perfect of technical scheme that the embodiment of the invention three is proposed, proposed to continue as under the situation of SGSN service at MSC1, SGSN selects other MSC, and the flow process that this MSC and SGSN and MME are connected, and its basic thought and key problem in technology point are as follows:

To be moved to SGSN by MME is example, and UE initiates joint route and upgrades (RAU), and SGSN inquires employed MSC information (Context Request message) to MME, and MME provides MSC information (Context Response message) to SGSN.

In addition, the information of MSC also can be provided by UE, and with LAI information, or LAI information and TMSI information band are given SGSN (RAU Request message is carried above-mentioned information) to UE in registration message.

SGSN obtains the employed MSC of MME address, if this MSC can't provide service for UE, SGSN reselects a MSC so, and notice is set up the related MME of ISR with it and this MSC connects simultaneously.

SGSN more notifies UE (RAU Accept message) in the new technological process in co-location, makes UE that state is set, and gets back to the E-UTAN network and initiate the tracing section updating flow process (TAU) of uniting at once under the scene that ISR activates.

Need to prove that processing method possible in above-mentioned flow process is: carry " MSC changed " IE or " Combined TAU Needed " IE or the like in the RAU Accept message and give UE.Instruct MS C changes, and gets back to the MSC that the E-UTRAN network need be reselected service.

Accordingly, UE receives after the above-mentioned message, possible processing method is: (Temporary Identity used in Next update TIN) is set to " P-TMSI " or GUTI and is set to " Update needed " or UE and a state " TAU needed " or the like scheme is set can triggers UE and get back to the MSC that the E-UTRAN network is initiated the service of reselecting the temporary mark that next update is used.

Make MME obtain the MSC information that connects with it from SGSN by newly-increased message.Be initiated to the connection building process of new MSC.

In addition, the information of MSC also can be provided by UE, and with LAI information, or LAI information and TMSI information band are given MME (TAU Request message is carried above-mentioned information) to UE in registration message.

As shown in Figure 5, by example five of the present invention the schematic flow sheet of a kind of method that connects with MSC of proposition, this method specifically may further comprise the steps:

A, attachment flow

B, ISR activation process

Step S502 to step S505, concrete steps content as the step S302 in the embodiment of the invention three as described in the step S305, present embodiment is explanation no longer separately.

Step S506, SGSN judge according to the information of the MSC1 that obtains whether MSC1 can serve for SGSN.

When judged result when being, carry out in the aforesaid embodiment of the invention three step S307 to the described flow process of step S310, no longer explanation in the present embodiment.；

When judged result for not the time, execution in step S507.

Step S507, SGSN send location update request message Location Update Request message to MSC2.

SGSN judges that according to the address of the selected MSC1 of MME that is obtained MSC1 can not think that UE provides service, and then SGSN selects a new MSC2 to connect.

Step S508, MSC2 send the position to SGSN and upgrade acceptance.

Step S509, SGSN initiate Routing Area Update to UE and accept message.

This message makes UE that an internal state or a mode such as sign position are set by carrying modes such as special cell or indication, guarantees that UE initiates associating tracing section updating flow process immediately when getting back to the E-UTRAN network under the ISR activation scenario.

Wherein, the embodiment of the invention such as entrained special cell or indication is not done further qualification in this message, and the mode that can reach constructed effect all belongs to protection scope of the present invention.

Step S510, UE initiate Routing Area Update to SGSN and finish message.

When UE gets back under the E-UTRAN network MME, UE is according to the description among step S509 in " ISR activations ", and triggering tracing section updating flow process specifies as follows:

C, tracing section updating flow process

Step S511, UE send the tracing section updating request message to MME.

When UE gets back under the E-UTRAN network MME, UE is according to the description among " ISR activations " middle step S509, initiating updating of tracking area request message immediately.

The processing here has two kinds of possibilities:

1) (Information Elements IE) is set to special cause value, guarantees that MME obtains the information of its employed MSC to the SGSN that sets up the ISR association for " Update Type " cell in the tracing section updating request message.

Be that MME carries out follow-up step S512 to step S514.

2) address information that UE can carry MSC2 in the tracing section updating request message, or sequence number or identification information, or MSC distributes to the LAI information of UE, or MSC distributes to the LAI information of UE and TMSI information (MME can utilize LAI information, or LAI information and the addressing of the TMSI information MSC2 that need connect) information and reports MME.

For example, in TAU message, carry: " MSC Address " or " MSC Number " or " TAI and or TMSI ".

Need further be pointed out that, carry " Old GUTI " cell in the TAU message.If TIN is designated as " P-TMSI " at this moment, then Old GUTI=P-TMSI+RAI.Can from RAI information, obtain about above-mentioned LAI information, be equally applicable in this step.

In addition, in the present TAU flow process, when TIN is designated as " P-TMSI ", MME needs execution in step S512 to step S514 and SGSN synchronous context so.But this moment, MME only need obtain the address information of MSC2, did not need and SGSN synchronous context (prerequisite is that under the situation that ISR activates, the bearer context of UE does not change).So also need to be provided with an indication information, indication MME does not need the synchronous context with SGSN.For example: carry TMSI information in TAU message, MME does not need the synchronous context with SGSN with regard to MME.

For above-mentioned processing mode 2), provide the address information of MSC2 by UE, MME does not need to carry out follow-up step S512 to step S514.

Step S512 to step S514, concrete steps content as the step S302 in the embodiment of the invention three as described in the step S305, present embodiment is explanation no longer separately.

The position that step S515, MME are initiated to MSC2 is new technological process more.

MME selects MSC according to the residing positional information of current UE (LAI information), because in the E-UTRAN network, the UE positional information that MME receives is TAI, so MME need be a LAI information with the TAI information mapping.Like this, according to aforesaid determination methods, if MSC2 can't be for UE provides service in the E-UTRAN network, to reselect one can be the MSC of UE service to MME so.Subsequent operation is as described in the embodiment of the invention three.

This situation belongs to abnormal conditions, and operator can avoid the generation of this situation by the network planning and configuration.

Further, another feasible method is as follows:

MME can with UE in the GERAN/UTRAN network residing positional information (LAI information) as its positional information (LAI information) in the E-UTRAN network.That is, not need the TAI information mapping be LAI information to MME.Can guarantee that like this MSC for the UE service continues to be the UE service in the E-UTRAN network in the GERAN/UTRAN network.

For first access E-UTRAN network, MME can dispose default positional information (LAI information), MME and be that UE selects the MSC that can serve according to this LAI information.When UE from E-UTRAN network insertion GERAN/UTRAN network, according to the scheme that the embodiment of the invention provided, if MSC can also be the UE service in the GERAN/UTRAN network, then SGSN establishes a connection to MSC, is the UE service otherwise reselect MSC in the GERAN/UTRAN network.At this moment, MME notifies UE (TAU Accept message) in the tracing section updating flow process of associating, make UE that state is set, under the scene that ISR activates, get back to the GERAN/UTRAN network and initiate the Routing Area Update flow process (RAU) of uniting at once, then the UE Routing Area Update flow process (RAU) that can initiate to unite is the MSC. that UE selects service by SGSN

Corresponding above-mentioned process description, possible processing method is: carry " MSC changed " cell or " Combined RAU Needed " cell or the like in the TAU Accept message and give UE, instruct MS C changes, and gets back to the MSC that the GERAN/UTRAN network need be reselected service.

Further, UE after receiving above-mentioned information may processing method be: TIN is set to " GUTI " or P-TMSI is set to " Update needed " or UE and a state or " Combined RAU Needed " or the like scheme is set can triggers UE and get back to the MSC that the GERAN/UTRAN network is initiated the service of reselecting.

Specifically as shown in Figure 5, comprise that MME sends location update request message to MSC2, MSC2 is to HSS (Home Subscriber Server, home subscriber server) sends the request of upgrading the position, HHS is to the notification message of MSC1 transmission canceling position, and MSC1 is to the affirmation message of HSS transmission canceling position, and HSS sends the affirmation message that the position is upgraded to MSC2, MSC2 upgrades a series of flow processs such as acceptance to the MME home position, the position of having finished MSC2 jointly is new technological process more.It is pointed out that each mentioned step can be adjusted accordingly in the foregoing description where shown in the figure in concrete enforcement scene, can reach the position that makes MSC2 and finish other flow processs of renewal and belong to protection scope of the present invention too.

On the other hand, here MME to obtain the address information of MSC2 as follows:

1) can be by possibility 1 among the step S511) description, provide by SGSN;

2) can be by possibility 2 among the step S511) description, provide by UE.

At this moment, the MSC2 while SGSN related with setting up ISR set up with MME and has been connected.MSC2 and HSS interactive information are upgraded the information among the HSS.

Step S516, MME send tracing section updating to UE and accept message, and the MME that sets up the ISR association is connected with MSC2 with SGSN simultaneously.

Step S517, UE send tracing section updating to MME and finish message.

Need be pointed out that further that the technical scheme that the embodiment of the invention proposed is equally applicable to UE moving under SGSN, the situation that LA changes.In corresponding handling process, UE initiates the associated update of SGSN inside, and wherein, SGSN does not change, in the ISR activation process of scenario B not execution in step S503 to step S505.

Further, because the influence (LA changes) of the band of position causes MSC to change, the technical scheme that this moment, the invention described above embodiment was proposed can guarantee that equally SGSN and MME that ISR is associated are connected to same MSC.

Inventive embodiments six has proposed a kind of method that connects with MSC, and its purpose is: when switching, the MME and the SGSN that set up the ISR association are connected to same MSC.This method is the further perfect of technical scheme that the embodiment of the invention four is proposed, proposed to continue as under the situation of SGSN service at MSC1, SGSN selects other MSC, and the flow process that this MSC and SGSN and MME are connected, and its basic thought and key problem in technology point are as follows:

To be moved to SGSN by MME is example, and Source eNodeB initiates handoff request (HandoverRequired), and MME provides MSC information (Forward Relocation Request message) to SGSN.

After switching was finished, UE initiated joint route and upgrades (RAU).The information of MSC also can be provided by UE, and with LAI information, or LAI information and TMSI information band are given SGSN (RAU Request message is carried above-mentioned information) to UE in registration message.

SGSN obtains the employed MSC of MME address, if this MSC can't provide service for UE, SGSN reselects a MSC so, and notice is set up the related MME of ISR with it and connected with new MSC simultaneously.

SGSN more notifies UE (RAU Accept message) in the new technological process in co-location, makes UE that state is set, and gets back to the E-UTAN network and initiate the tracing section updating flow process (TAU) of uniting at once under the scene that ISR activates.Make MME obtain the MSC information that connects with it from SGSN by newly-increased message.Be initiated to the connection building process of new MSC.

As shown in Figure 6, by example six of the present invention the schematic flow sheet of a kind of method that connects with MSC of proposition, this method specifically may further comprise the steps:

A, attachment flow

B, switching flow

Step S602 to step S608, concrete steps content as the step S402 in the embodiment of the invention four as described in the step S408, present embodiment is explanation no longer separately.

Step S609, SGSN judge according to the information of the MSC1 that obtains whether MSC1 can serve for SGSN.

When judged result when being, carry out in the aforesaid embodiment of the invention four step S410 to the described flow process of step S412, no longer explanation in the present embodiment;

When judged result for not the time, execution in step S610.

Step S610, SGSN send location update request message Location Update Request message to MSC2.

SGSN judges that according to the address of the selected MSC1 of MME that obtains MSC1 can not think that UE provides service, and then SGSN selects a new MSC2 to connect.

Step S611, MSC2 send the position to SGSN and upgrade acceptance.

Step S612, SGSN initiate Routing Area Update to UE and accept message.

When UE gets back under the E-UTRAN network MME, UE is according to the description among step S612 in " ISR activations ", and triggering tracing section updating flow process specifies as follows:

C, tracing section updating flow process

In the present embodiment, tracing section updating flow process and the aforesaid embodiment of the invention five described tracing section updating flow process basically identicals, difference wherein is, in step S613, when UE gets back under the E-UTRAN network MME, UE is the state setting according to step S612 in " switching ", initiating updating of tracking area request message immediately.

The embodiment of the invention seven has proposed a kind of method that connects with MSC, and its purpose is: when ISR activated, the MME and the SGSN that set up the ISR association were connected to same MSC.This method is the further perfect of technical scheme that the embodiment of the invention three is proposed, proposed to continue as under the situation of SGSN service at MSC1, SGSN selects other MSC, and the flow process that this MSC and SGSN and MME are connected, and its basic thought and key problem in technology point are as follows:

SGSN obtains the employed MSC of MME address, if this MSC can't provide service for UE, SGSN reselects a MSC so, and notice is set up the related MME of ISR with it and MSC connects simultaneously.

SGSN connects with new MSC by existing message (Context Ack) or newly-increased message informing MME on the S3 interface.After MME receives message, initiate the flow process that connects with new MSC.

As shown in Figure 7, by example seven of the present invention the schematic flow sheet of a kind of method that connects with MSC of proposition, this method specifically may further comprise the steps:

A, attachment flow

B, ISR activation process

Step S702 to step S704, concrete steps content as the step S302 in the embodiment of the invention three as described in the step S304, present embodiment is explanation no longer separately.

Step S705, SGSN judge according to the information of the MSC1 that obtains whether MSC1 can serve for SGSN.

When judged result for not the time, execution in step S706, or after execution in step s707 and step S708, execution in step S709.

Step S706, SGSN send context and confirm (Context Ack) message to MME, to the address information of the new MSC2 that selects of MME transmission.

SGSN sends the context of the address information that comprises MSC2 and confirms that (Context Ack) message is to MME.

Cell for transmitting in context affirmation (Context Ack) message has following two kinds of processing methods:

1) carry the address information of LAI and MSC2 in the message, the method for expressing of the address information of MSC2 is as described in the embodiment three;

2) address information of cause specific value or cell and MSC2, MSC2 receives this cause specific value or cell, know this moment MME to initiate be a process that connects with it, not carrying LAI information in the message does not influence follow-up processing yet.

Step S707, SGSN send location update request message Location Update Request message to MSC2.

Step S708, MSC2 send the position to SGSN and upgrade acceptance.

Further, if SGSN does not transmit the address information of the MSC2 of selection newly to MME among the step S706, increase step S709 in this flow process, particular content is:

Step S709, SGSN send location update message to MME, send the address information of MSC2 to MME.

For the cell that transmits in the location update message, following two kinds of processing methods can be arranged:

1) carry the address information of LAI and MSC2 in the message, the method for expressing of the address information of MSC2 is as described in the embodiment one;

2) address information of cause specific value or cell and MSC2, MSC2 receives cause specific value or cell, know this moment MME to initiate be a process that connects with it, not carrying LAI information in the message does not influence follow-up processing yet.

The effect of this step is that the address information of the MSC2 that SGSN will newly select brings MME, has adopted SGSN to initiate the form of location update message to MME, and the present invention does not limit message or the form that adopts other.

It is to be noted; whether comprising step S709 in the flow process that present embodiment proposed need decide according to the address information that whether has sent MSC2 to MME among the step S706; when having sent this information among the step S706; step S709 will no longer need; otherwise; then need step S709 to finish the task of the address information that sends MSC2, therefore, whether comprising step S709 does not influence protection scope of the present invention.

The position that step S710, MME are initiated to MSC2 is new technological process more.

The idiographic flow of this step step S515 in the embodiment of the invention five as described above is described, repeated description no longer in the present embodiment.

It is pointed out that here MME is connected to MSC2 two kinds of possibilities are arranged:

1) obtain by the described method of step S706, can not carry out follow-up step S709 this moment;

2) if SGSN then obtains by step S709 not to the address information of MME transmission MSC2 among the step S706.

Step S711, MME send the position to SGSN and upgrade acknowledge message.

If in the signature process, do not comprise step S709, then, step S711 is also default accordingly.

Step S712, SGSN initiate Routing Area Update to UE and accept message.

Step S713, UE initiate Routing Area Update to SGSN and finish message.

Need be pointed out that further that the technical scheme that the embodiment of the invention proposed is equally applicable to UE moving under SGSN, the situation that LA changes.In corresponding handling process, UE initiates the associated update of SGSN inside, and wherein, SGSN does not change, in the ISR activation process of scenario B not execution in step S703 to step S706.

Because the influence (LA changes) of the band of position causes MSC to change, this moment, such scheme can guarantee that equally SGSN and MME that ISR is associated are connected to same MSC.

Inventive embodiments six has proposed a kind of method that connects with MSC, and its purpose is: when switching, the MME and the SGSN that set up the ISR association are connected to same MSC.This method is the further perfect of technical scheme that the embodiment of the invention four is proposed, proposed to continue as under the situation of SGSN service at MSC 1, SGSN selects other MSC, and the flow process that this MSC and SGSN and MME are connected, and its basic thought and key problem in technology point are as follows:

SGSN connects with new MSC by existing message (Forward Relocation Response) or newly-increased message informing MME on the S3 interface.After MME receives message, initiate the flow process that connects with new MSC.

As shown in Figure 8, by example eight of the present invention the schematic flow sheet of a kind of method that connects with MSC of proposition, this method specifically may further comprise the steps:

A, attachment flow

B, switching flow

Step S802 to step S803, concrete steps content as the step S402 in the embodiment of the invention four as described in the step S403, present embodiment is explanation no longer separately.

Step S804, SGSN send and transmit relocation response message to MME.

Processing for transmitting in the relocation response message can have following two kinds of processing methods:

Step S805, MME send the forwarding reorientation and finish message to SGSN.

Step S806 to step S811, concrete steps content as the step S606 in the embodiment of the invention six as described in the step S611, present embodiment is explanation no longer separately.

Step S812, SGSN initiate location update message to MME.

If SGSN does not transmit the address information of the new MSC2 that selects among the step S804 to MME, then SGSN initiates location update message to MME.

The position that step S813, MME are initiated to MSC2 is new technological process more.

Here MME is connected to MSC2 two kinds of possibilities:

1) obtain by the described method of step S804, can not carry out follow-up step S812 this moment;

2) if or among the step S804 SGSN do not send the address information of MSC2 to MME, then obtain by step S812.

Step S814, MME send the position to SGSN and upgrade acknowledge message.

Step S815, SGSN initiate Routing Area Update to UE and accept message.

The embodiment of the invention nine has proposed a kind of method that connects with MSC, and its purpose is: when ISR activated, the MME and the SGSN that set up the ISR association were connected to same MSC.This method is the further perfect of technical scheme that the embodiment of the invention three is proposed, proposed to continue as under the situation of SGSN service at MSC1, SGSN selects other MSC, and the flow process that this MSC and SGSN and MME are connected, and its basic thought and key problem in technology point are as follows:

In addition, the information of MSC also can be provided by UE, and with LAI information, or LAI information and TMSI information band are given SGSN (RAU Request message is carried LAI information, or LAI information and TMSI information) to UE in registration message.

SGSN tells new MSC (Location Update Request message) with the MME address in message, MSC finds that MME does not connect with it, then sends out the flow process that message (message on the newly-increased SGs interface) notice MME initiation connects.Also can think that MSC initiatively sends out message informing MME this moment, and MME replys response, finishes establishment of connection.

As shown in Figure 9, by example nine of the present invention the schematic flow sheet of a kind of method that connects with MSC of proposition, this method specifically may further comprise the steps:

A, attachment flow

B, ISR activation process

Step S902 to step S905, concrete steps content as the step S302 in the embodiment of the invention three as described in the step S305, present embodiment is explanation no longer separately.

Step S906, SGSN judge according to the information of the MSC1 that obtains whether MSC1 can serve for SGSN.

When judged result for not the time, promptly SGSN judges that according to the address of the selected MSC1 of MME that obtains MSC1 can not think that UE provides service, then SGSN selects a new MSC2 to connect execution in step S907.

Step S907, SGSN send location update request message Location Update Request message to MSC2.

Carry the MME address of setting up the ISR association in this message and inform MSC2, SGSN carries a special indication in also might message and triggers MSC2 and send message to MME and connect, and promptly carries out subsequent step S908.

The MME address information that step S908, MSC2 report by SGSN if do not connect with it, then sends location update message to setting up the related MME of ISR with SGSN.

For " position renewal " message here, the present invention does not do qualification to message name, and effect is to set up being connected between MSC2 and the MME.

Carry the address information (for example, SGSN Number) of MSC in this message, perhaps other characterizes the cell or the form of MSC address information.

Step S909, MME recover response to MSC2 and set up being connected between MME and the MSC2.

The position of step S910, MSC2 is new technological process more.

It is pointed out that in this step MSC2 upgrades to the MME home position to accept, but execution in step S911, step difference does not herein influence protection scope of the present invention.

Step S911, MSC2 send the position renewal to SGSN and accept message, inform that SGSN connects foundation and finishes.

Step S912, SGSN initiate Routing Area Update to UE and accept message.

Step S913, UE initiate Routing Area Update to SGSN and finish message.

Need be pointed out that further that the technical scheme that the embodiment of the invention proposed is equally applicable to UE moving under SGSN, the situation that LA changes.In corresponding handling process, UE initiates the associated update of SGSN inside, and wherein, SGSN does not change, in the ISR activation process of scenario B not execution in step S903 to step S905.

Inventive embodiments ten has proposed a kind of method that connects with MSC, and its purpose is: when switching, the MME and the SGSN that set up the ISR association are connected to same MSC.This method is the further perfect of technical scheme that the embodiment of the invention four is proposed, proposed to continue as under the situation of SGSN service at MSC1, SGSN selects other MSC, and the flow process that this MSC and SGSN and MME are connected, and its basic thought and key problem in technology point are as follows:

SGSN tells new MSC (Location Update Request message) with the MME address in message, MSC finds that MME does not connect with it, then sends out the flow process that message (message on the newly-increased SGs interface) notice MME initiation connects.Also can think that MSC initiatively sends out message informing MME this moment, and MME replys response, finishes to connect and set up.

As shown in figure 10, by example ten of the present invention the schematic flow sheet of a kind of method that connects with MSC of proposition, this method specifically may further comprise the steps:

A, attachment flow

B, switching flow

Step S1002 to step S1008, concrete steps content as the step S402 in the embodiment of the invention four as described in the step S408, present embodiment is explanation no longer separately.

Step S1009, SGSN judge according to the information of the MSC1 that obtains whether MSC1 can serve for SGSN.

When judged result for not the time, promptly SGSN judges that according to the address of the selected MSC1 of MME that obtains MSC1 can not think that UE provides service, then SGSN selects a new MSC2 to connect execution in step S1010.

Step S1010, SGSN send location update request message Location Update Request message to MSC2.

Carry in this message and set up the related MME address of ISR with it and inform MSC2, SGSN carries a special indication in also might message and triggers MSC2 and send message to MME and connect.That is, carry out subsequent step S1011.

The MME address information that step S1011, MSC2 report by SGSN if do not connect with it, then sends location update message to setting up the related MME of ISR with SGSN.

Step S1012, MME recover response to MSC2 and set up being connected between MME and the MSC2.

The position that step S1013, MME are initiated to MSC2 is new technological process more.

It is pointed out that in this step MSC2 upgrades to the MME home position to accept, but execution in step S1014, step difference does not herein influence protection scope of the present invention.

Step S1014, MSC2 send the position renewal to SGSN and accept message, inform that SGSN connects foundation and finishes.

Step S1015, SGSN initiate Routing Area Update to UE and accept message.

Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize based on such understanding by the mode that software adds necessary general hardware platform, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.

Claims

1. a method that connects with moving exchanging center MSC is characterized in that, comprising:

When terminal switched to second network by first network, second network entity that is positioned at described second network obtained the information of a MSC, and wherein, a described MSC is connected with first network entity in first network;

2. the method for claim 1 is characterized in that, described second network entity is according to the information of a described MSC who gets access to, and the mode with a described MSC connects specifically comprises:

According to the information of a described MSC who gets access to, described second network entity judges whether a described MSC can be described Terminal Service in described second network;

When a described MSC cannot be described Terminal Service in described second network, described second network entity selected the 2nd MSC to connect, and first network entity and described the 2nd MSC are connected.

3. the method for claim 1 is characterized in that, described second network entity obtains the mode of terminal information of a pairing MSC in described first network, specifically comprises:

Described second network entity receives the information of a described MSC of described terminal to report; Or,

Described second network entity sends query messages to described first network entity, and receives the information of the described MSC that described first network entity returns; Or,

Described second network entity receives the information of the described MSC that described first network entity reports.

4. method as claimed in claim 3 is characterized in that, described second network entity receives the information of the described MSC that described first network entity reports, is specially:

Described second network entity receives the RELOCATION REQUEST message of the information that comprises a described MSC of described first network entity transmission; Or,

Described second network entity receives the context response information of the information that comprises a described MSC of described first network entity transmission.

5. method as claimed in claim 4 is characterized in that, described second network entity receives before the RELOCATION REQUEST message of the information that comprises a described MSC that first network entity sends, and also comprises:

The handoff request that the described first network entity reception sources enode source eNodeB sends;

Described first network entity sends the described RELOCATION REQUEST message that comprises the information of a MSC to second network entity.

6. method as claimed in claim 2 is characterized in that, first network entity and described the 2nd MSC are connected, and comprising:

Described second network entity sends the message of carrying indication information to described terminal, when described indication information makes described terminal return described first network, triggers the tracing section updating flow process;

Described first network entity obtains the message of the information of described the 2nd MSC;

Described first network entity connects with described the 2nd MSC according to the information of described the 2nd MSC.

7. method as claimed in claim 6 is characterized in that, described first network entity obtains the mode of message of the information of described the 2nd MSC, specifically comprises:

Described first network entity receives the message of the information that comprises described the 2nd MSC of described terminal transmission; Or,

Described first network entity receives that described terminal sends comprises the message of triggering sign from the information of described the 2nd MSC to described second network entity that obtain, and according to described triggering sign, obtains the information of described the 2nd MSC to described second network entity.

8. method as claimed in claim 2 is characterized in that, described first network entity and described the 2nd MSC is connected, and specifically comprises:

Described second network entity sends the message of the information that comprises described the 2nd MSC to described first network entity, and described first network entity connects according to information and described the 2nd MSC of described the 2nd MSC.

9. method as claimed in claim 8, it is characterized in that, also further comprise default reason mark in the message of the described information that comprises described the 2nd MSC, then described first network entity connects according to information and described the 2nd MSC of described the 2nd MSC, is specially:

Described first network entity sends the message that comprises described default reason mark to described the 2nd MSC, and described the 2nd MSC connects with described first network entity according to described default reason mark.

10. method as claimed in claim 8 is characterized in that, describedly sends the message of the information comprise described the 2nd MSC to first network entity, is specially:

The context acknowledgement message that described second network entity sends to described first network entity; Or,

The location update message that described second network entity sends to described first network entity.

11. method as claimed in claim 8 is characterized in that, when described terminal is moved in described second network, when causing described the 2nd MSC to switch to described the 3rd MSC, also comprises:

Described second network entity and described the 3rd MSC connect;

Described second network entity sends the message of the information that comprises described the 3rd MSC to described first network entity, and described first network entity connects according to information and described the 3rd MSC of described the 3rd MSC.

12. method as claimed in claim 2, it is characterized in that, when a described MSC cannot be described Terminal Service in described second network, described second network entity select can be in described second network for after the 2nd MSC of described Terminal Service connects, also comprise:

Described the 2nd MSC receives the message of the information that comprises described first network entity of second network entity transmission;

When described the 2nd MSC did not connect with described first network entity, described the 2nd MSC sent the message of the information that comprises described the 2nd MSC to described first network entity, connects with described first network entity.

13. method as claimed in claim 12 is characterized in that, when described terminal is moved in described second network, when causing described the 2nd MSC to switch to described the 3rd MSC, also comprises:

Described the 3rd MSC and described second network entity connect;

Described the 3rd MSC receives the message of the information that comprises described first network entity of described second network entity transmission;

Described the 3rd MSC judges whether to connect with described first network entity according to the information of described first network entity;

When described the 3rd MSC judges when not connecting with described first network entity, described the 3rd MSC sends the message of the information that comprises described the 3rd MSC to described first network entity, connects with described first network entity.

14., it is characterized in that the information of a described MSC, the 2nd MSC or the 3rd MSC specifically comprises as any described method in the claim 1 to 13:

The address information of a described MSC, the 2nd MSC or the 3rd MSC; Or,

Sequence number or the identification information of a described MSC, the 2nd MSC or the 3rd MSC; Or,

A described MSC, the 2nd MSC or the 3rd MSC distribute to the lane place identification code LAI information of described terminal; Or,

A described MSC, the 2nd MSC or the 3rd MSC distribute to the LAI information and the temporarily moved subscriber identify label TMSI information of described terminal.

15. method as claimed in claim 14 is characterized in that,

When the information of a described MSC, the 2nd MSC or the 3rd MSC is that a described MSC, the 2nd MSC or the 3rd MSC are when distributing to the LAI information of described terminal, described method also comprises according to described LAI information, described second network entity carries out addressing to a described MSC, the 2nd MSC or the 3rd MSC, obtains the address information of a described MSC, the 2nd MSC or the 3rd MSC; Or,

When the information of a described MSC, the 2nd MSC or the 3rd MSC is that a described MSC, the 2nd MSC or the 3rd MSC are when distributing to the LAI information of described terminal and TMSI information, described method also comprises according to described LAI information and TMSI information, described second network entity carries out addressing to a described MSC, the 2nd MSC or the 3rd MSC, obtains the address information of a described MSC, the 2nd MSC or the 3rd MSC.

16. a network entity is positioned at second network, it is characterized in that, comprising:

Acquisition module is used for obtaining the information of described terminal pairing MSC in described first network when terminal switches to second network by first network, and wherein, a described MSC is connected with first network entity in described first network;

17. network entity as claimed in claim 16 is characterized in that, also comprises:

Judge module is used for the information of the described MSC that gets access to according to described acquisition module, judges whether a described MSC can be described Terminal Service in described second network;

Described link block, also being used for judging a described MSC when described judge module cannot be when described second network be described Terminal Service, selection can be for the 2nd MSC of described Terminal Service connects in described second network, and first network entity and described the 2nd MSC are connected.

18. network entity as claimed in claim 16 is characterized in that, described acquisition module specifically comprises:

Receive submodule, be used to receive the information of a described MSC of described terminal to report; Or receive the information of the described MSC that described first network entity returns.

19. network entity as claimed in claim 18 is characterized in that, when described reception submodule was used to receive the information of the described MSC that described first network entity returns, described acquisition module also comprised:

The inquiry submodule is used for sending query messages to described first network entity.

20. network entity as claimed in claim 16 is characterized in that, described link block specifically comprises:

The connexon module is used for and can connects for the 2nd MSC of described Terminal Service at described second network;

Send submodule, be used for sending the message of carrying indication information to described terminal, when described indication information makes described terminal return described first network, trigger the tracing section updating flow process, first network entity is connected with the 2nd MSC that the described first connexon module is connected.

21. network entity as claimed in claim 20 is characterized in that,

Described connexon module also is used for and can connects for the 2nd MSC of described Terminal Service at described second network;

Described transmission submodule also is used for sending to described first network entity message of the information that comprises the 2nd MSC that the described second connexon module connected, and described first network entity connects according to information and described the 2nd MSC of described the 2nd MSC.

22. network entity as claimed in claim 20 is characterized in that,

Described transmission submodule is used for sending to described the 2nd MSC the message of the information that comprises described first network entity, so that described the 2nd MSC triggers the flow process that connects with described first network entity.

23. network entity as claimed in claim 16 is characterized in that, also comprises:

Addressed module, when the information that is used for the MSC that obtains when described acquisition module is LAI information, according to described LAI information, corresponding M SC is carried out addressing, obtain the address information of each corresponding MSC, or, when the information of the MSC that described acquisition module obtained is LAI information and TMSI information, according to described LAI information and TMSI information, corresponding M SC is carried out addressing, obtain the address information of each corresponding MSC.