CN101277470A

CN101277470A - Method and system for obtaining IP-CAN bearing

Info

Publication number: CN101277470A
Application number: CNA2007100906393A
Authority: CN
Inventors: 于益俊; 吴问付
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-03-30
Filing date: 2007-03-30
Publication date: 2008-10-01
Anticipated expiration: 2027-03-30
Also published as: CN101277470B

Abstract

The present invention provides a method of acquiring IP connection access network bearing, including: acquiring home type information corresponding to the IP-CAN bearing home network, obtaining IP-CAN bearing meeting the bearing home network requirement by utilizing the acquired home type information. The invention also provides a system of obtaining IP-CAN bearing, the system includes an acquisition module and an execution module. The application of the invention can utilize the existed IP-CAN bearing meeting the bearing home network requirement.

Description

A kind of method and system that obtains the IP-CAN carrying

Technical field

The present invention relates to moving communicating field, particularly a kind of method and system that obtains the IP-CAN carrying.

Background technology

When system need provide business, just connect Access Network (IP-CAN by IP, IP-ConnectivityAccess Network) is user terminal (UE, when Usesr Equipment) providing service, user terminal or network side need utilize the IP-CAN that satisfies relevant signaling transmission requirement to carry command transmitting or data.User terminal is when first carrying of setting up the IP-CAN session, gateway can distribute an IP address for this user terminal, and set up in carrying and to bring user terminal in the response message, and when other carryings of this IP-CAN session are set up, all bearer contexts in this IP-CAN session are shared identical context user terminal IP address, and the home network of the carrying of identical user terminal IP is identical.Here, the IP-CAN network can be General Packet Radio System (GPRS, Global Packet Radio System), universal mobile telecommunications system (UMTS, Universal Mobile Telecommunication System), World Interoperability for Microwave Access, WiMax (WiMAX, World Interoperability for Microwave Access) mobile communications network such as system or Long Term Evolution/System Architecture Evolution (LTE/SAE, Long Term Evolution/System ArchitectureEvolution) network.

When UE was positioned at ownership place, all were used for the IP-CAN carrying of command transmitting or data, all can think the IP-CAN carrying of local network, and at this moment, belonging area network is a local network; And be positioned at when ground visit as UE, and being used for the IP-CAN carrying of command transmitting or data, can be divided into the IP-CAN carrying of local network and the IP-CAN of far-end network to carry, at this moment, access zone network is a local network, and belonging area network is a far-end network.

For some specific business, carrying also has further requirement to the IP-CAN of command transmitting or data.Such as, for as urgency traffics such as alarm call, the phones of seeking help, must utilize the IP-CAN carrying of the local network at UE place, initiate the urgency traffic conversation request.Promptly when UE was positioned at ownership place, UE initiated the urgency traffic conversation request at ownership place; When UE was positioned at visit ground, UE must initiate the urgency traffic conversation request on visit ground.For another example, the non-emergent business of the support routing optimality function of initiating when being positioned at visit ground for UE, policy configurations according to system, some business must utilize the IP-CAN of local network to finish with being carried on visit, and some business must be got back to ownership place, utilizes the IP-CAN carrying of far-end network to finish.

And be in when ground visit as UE, regular meeting visit ground and ownership place exist at least respectively one can command transmitting or the IP-CAN of data carry.Such as, when the IP-CAN network is the SAE network, for guaranteeing that UE can normally initiate business at ownership place and visit ground, UE can set up carrying respectively on the gateway on ownership place and visit ground, obtain two IP addresses, and utilize these two IP addresses to be registered to the service system from visit ground and ownership place respectively, such as the IMS network, there is an available IP-CAN carrying in UE at least on visit ground and ownership place like this.

At present, because do not select the method for IP-CAN carrying, thereby, when UE initiates some specific transactions on visit ground, because can not judge the home network of already present IP-CAN carrying is local network or far-end network, thereby can not utilize already present IP-CAN carrying; If, when selecting the IP-CAN carrying of not satisfying the specific transactions requirement, can increase the time that specific transactions is handled by selecting to obtain the IP-CAN carrying at random.Such as, for urgency traffic, if selected the IP-CAN carrying of home network, according to present treatment mechanism, UE can only set up special emergency bearing in addition and finish the emergent operation request processing on visit ground, and can not utilize the already present IP-CAN carrying of satisfying transmission requirement that belongs to visit ground, thereby, processing time increased to urgency traffic.

In sum, obtain the method for IP-CAN carrying at present, can't utilize the IP-CAN carrying of already present satisfied carrying home network requirement, thereby increased processing time specific transactions.

Summary of the invention

The embodiment of the invention provides a kind of method of the IP-CAN of acquisition carrying, and this method can be utilized the IP-CAN carrying of already present satisfied carrying home network requirement.

The embodiment of the invention provides a kind of system of the IP-CAN of acquisition carrying, and this system can utilize the IP-CAN carrying of already present satisfied carrying home network requirement.

For reaching above-mentioned first purpose, the technical scheme of the embodiment of the invention specifically is achieved in that

A kind of method that obtains the IP-CAN carrying, this method comprises: obtain and the corresponding home type information of IP-CAN carrying home network, utilize the home type information of obtaining, be met the IP-CAN carrying of carrying home network requirement.

For reaching above-mentioned second purpose, the technical scheme of the embodiment of the invention specifically is achieved in that

A kind of system that obtains the IP-CAN carrying, this system comprises acquisition module and Executive Module;

Described acquisition module is used to obtain and the corresponding home type information of IP-CAN carrying home network, and the home type information of obtaining is sent to Executive Module;

Described Executive Module is used to utilize the home type information of acquisition module input, is met the IP-CAN carrying of carrying home network requirement.

As seen from the above technical solution, the method and system of a kind of IP-CAN of acquisition carrying that the embodiment of the invention provides, can utilize the home type information of IP-CAN carrying, obtain to satisfy the IP-CAN carrying that the carrying home network requires, thereby make full use of existing IP-CAN carrying, can save bearing resource, and to processing time of specific transactions.

Description of drawings

The method flow schematic diagram of Fig. 1 home type information of default IP-CAN carrying for SAE network in the first embodiment of the invention obtains.

Fig. 2 obtains the method flow schematic diagram of the home type information of special I P-CAN carrying for SAE network in the second embodiment of the invention.

Fig. 3 obtains the method flow schematic diagram of the home type information of IP-CAN carrying for GPRS network in the third embodiment of the invention.

Fig. 4 is for utilizing the method flow schematic diagram of home type information acquisition IP-CAN carrying in the four embodiment of the invention.

Fig. 5 is for utilizing the method flow schematic diagram of home type information acquisition IP-CAN carrying in the fifth embodiment of the invention.

Fig. 6 is for utilizing the method flow schematic diagram of home type information acquisition IP-CAN carrying in the sixth embodiment of the invention.

Fig. 7 is the method flow schematic diagram that upgrades home type information in the eighth embodiment of the invention.

Fig. 8 is the method flow schematic diagram that upgrades home type information in the ninth embodiment of the invention.

The system configuration schematic diagram that the acquisition IP-CAN that Fig. 9 provides for the embodiment of the invention carries.

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.

The main thought of the embodiment of the invention is: obtain and the corresponding home type information of IP-CAN carrying home network, utilize the home type Information Selection IP-CAN carrying of obtaining.

In order to make UE or network side can utilize the home type information of IP-CAN carrying, obtain the IP-CAN carrying, in each IP-CAN loading establishing process, UE or network side at first obtain and preserve the home type information of carrying.Embodiment one, embodiment two and embodiment three have provided the method that UE or network side obtain home type information, and the home type information here comprises carrying home type information or at the address attaching information of user terminal IP address.

Embodiment one:

Present embodiment is an example with the default IP-CAN loading establishing process at the SAE network, illustrate that UE obtains the method for the address home type information of default IP-CAN carrying, in the present embodiment, obtain carrying home type information earlier, obtain address home type information according to carrying home type information again.

Fig. 1 is the method flow schematic diagram that obtains the address home type information of default IP-CAN carrying in the first embodiment of the invention, referring to Fig. 1, subscriber equipment (UE, User Equipment) base station (eNB of the evolution in the process wireless access network (Evolved RAN) of evolution, evolved Node Base), request is adhered in packet-based core networks (Evolved Packet Core) transmission to evolution, and by mobile management entity (MME, Mobility Management Entity) and user entity (UPE, User PlaneEntity), send default bearer to connecting system anchor point (IASA, Inter Access System Anchor) and set up request.Wherein, MME separates with UPE, and is used for carrying and sets up and the session management module of management is arranged on MME.

Present embodiment is in default IP-CAN loading establishing process, at this moment, UE does not have the distributing IP address, the carrying home type information that MME carries default IP-CAN is included in and passes to eNB in the radio bearer request message, eNB is in carrying out the Radio Resource connection procedure, should carry home type information and be included in the Radio Resource connection request message and pass to UE, UE preserves this carrying home type information.

In the present embodiment, MME also can be included in the address home type information of distributing to the IP address of UE and pass to eNB in the radio bearer request message, eNB is in carrying out the Radio Resource connection procedure, this address home type information is included in the Radio Resource connection request message passes to UE, UE is kept at address home type information.

Specifically may further comprise the steps:

Step 101:UE sends to MME by eNB and adheres to request.

Step 102:MME and HSS are mutual, finish the process of UE registration.

Step 103:MME sends default bearer by UPE to IASA and sets up request.

In the present embodiment, MME sends default bearer by UPE to IASA and sets up the carrying home type information that comprises default bearer in the request message.The carrying home type information of this default bearer is produced by the home type generation module that is arranged among the MME, can produce carrying home type information according to the gateway address of the IP-CAN carrying of obtaining or according to the carrying ownership strategy that sets in advance.In the present embodiment, producing the method for carrying home type information is: the gateway address that obtains the IP-CAN carrying; Whether the gateway address of judging the IP-CAN carrying of obtaining is the address of local network, if then this IP-CAN is carried as the carrying of local network, the carrying home type information of generation is local network, otherwise the carrying home type information of generation is far-end network.In the present embodiment, gateway address is the address of the connecting system anchor point among the IASA.

Carrying home type information is a switch value, when value is true (TRUE), represents that this IP-CAN carrying belongs to local network; When value is false (FALSE), represent that this IP-CAN carrying belongs to far-end network.

Step 104:IASA returns default bearer by UPE to MME and sets up the request response.

In the present embodiment, IASA gets off the carrying home type information stores of the default bearer that obtains as network side.

Step 105:MME sends the radio bearer request to eNB.

In the present embodiment, MME sends the radio bearer request of carrying carrying home type information to eNB.

In the present embodiment, MME also can carry address home type information to the radio bearer request that eNB sends.

Step 106:eNB sends the Radio Resource connection request to UE.

In the present embodiment, eNB sends the Radio Resource connection request that carries carrying home type information to UE.

In the present embodiment, eNB also can carry address home type information to the Radio Resource connection request that UE sends.

Step 107:UE preserves carrying home type information.

In the present embodiment UE will carry home type information directly and the IP-CAN bearer context be kept at together, UE can utilize carrying home type information according to business need, selects suitable IP-CAN to carry.

After UE receives carrying home type information in the present embodiment, can also the address home type information of home type as user terminal IP address will should be carried, in the time of need selecting the IP-CAN carrying with box lunch, UE can be according to business need, utilize address home type information, select suitable IP address, select IP-CAN carrying suitable in this IP address again.

UE also can directly be kept at the address home type information of receiving together with the IP address of distributing to user terminal in the present embodiment.

Step 108:UE sends the Radio Resource connection response to eNB.

Step 109:eNB sends radio bearer request response to MME.

Step 110:MME sends default bearer to IASA and sets up response.

If in step 103, do not carry carrying home type information, can in IASA transmission default bearer foundation response, comprise carrying home type information at MME so.

Step 111:MME sends to UE by eNB and adheres to reception message.

Step 112:UE sends to adhere to MME by eNB and finishes message.

Present embodiment also can separate with UPE with UPE unification or MME such as MME under other network architectures, realizes under the network architecture that session management is finished in UPE.If separate with UPE at MME, but under the situation that session management is finished in UPE, this carrying home type informational needs brings UE in the radio bearer request message that UPE initiates.In addition, except radio bearer request message is carried carrying home type information, also can utilize other message that send to UE, as adhere to receive and carry carrying home type information in the message.

In addition, also can directly obtain the address home type information of user terminal IP address without the carrying home type, UE is when first carrying of setting up the IP-CAN session, gateway can distribute an IP address for this UE, thereby, in step 103, should produce address home type information according to the gateway address of distributing user IP address of terminal or according to the address ownership strategy that sets in advance.According to the gateway address of distributing user IP address of terminal, the method that produces address home type information is: the gateway address that obtains the distributing user IP address of terminal; Whether the gateway address of judging the distributing user IP address of terminal that obtains is the address of local network, if, the then carrying that is carried as local network of this IP address, the address home type information of generation is local network, otherwise the address home type information of generation is far-end network.Step 107 should be the memory address home type, and the carrying home type in other step should be the address home type.

Address home type that produces and IP address allocated also can be included in and receive in the message adhering to of step 111.At this moment, after UE receives this message, the step that IP address that the needs increase will be received and address home type are preserved.In the time of need selecting the IP-CAN carrying with box lunch, UE can utilize address home type information according to business need, selects suitable IP address, selects IP-CAN carrying suitable in this IP address again.

Embodiment two:

Present embodiment is an example with the proprietary IP-CAN loading establishing process at the SAE network, illustrate that UE obtains the method for the home type information of proprietary IP-CAN carrying, Fig. 2 is the method flow schematic diagram that obtains the home type information of proprietary IP-CAN carrying in the second embodiment of the invention, referring to Fig. 2, MME and UPE close and are made as the MME/UPE entity, present embodiment is in the proprietary IP-CAN loading establishing process that network side is initiated, MME/UPE will carry home type information by radio bearer request message, send to UE.Because it is to be based upon to UE has distributed under the situation of IP address that the dedicated bearing that network side is initiated is set up flow process, promptly this UE has set up at least one at this IP address and has carried.Thereby, the method of obtaining the carrying ownership category information of newly-built IP-CAN carrying is: according to the UE IP address allocated, search the carrying that this IP address is set up, this IP address has been set up the carrying home type information of the carrying home type information of carrying as newly-built carrying.After receiving carrying home type information, with the address home type information of this home type information as user terminal IP address.With reference to Fig. 2, concrete steps comprise:

Step 201:IASA sends carrying to MME/UPE and sets up request.

In the present embodiment, IASA is according to the UE IP address allocated, and the carrying of finding this IP address to set up, and the carrying that this IP address has been set up is as the carrying home type information of obtaining is included in carrying that IASA sends and sets up and bring MME in the request message.

Step 202:MME/UPE sends the radio bearer request to eNB.

In the present embodiment, MME/UPE sends the wireless IP-CAN carrying request of carrying carrying home type information to eNB.Carrying home type information is an enumerated value, is that this IP-CAN carrying of 0 expression belongs to local network as value, and value is that this IP-CAN carrying of 1 expression belongs to far-end network, and value is to represent other information at 2 o'clock.

Step 203:eNB sends the Radio Resource connection request to UE.

Step 204:UE preserves carrying home type information.

After UE receives carrying home type information in the present embodiment, this home type value of information can be saved in the address home type information of IP address, when needing the IP-CAN carrying with box lunch, UE can be according to business need, utilize address home type information, select suitable IP address, select IP-CAN carrying suitable in this IP address again.

Step 205:UE sends the Radio Resource connection response to eNB.

Step 206:eNB sends radio bearer request response to MME.

Step 207:MME/UPE sends the request resource response to IASA.

In the present embodiment, network side IASA obtains the carrying home type of carrying according to the IP address of UE, UE obtains carrying home type information by the message of carrying carrying home type information that parsing MME/UPE sends, certainly UE also can obtain the carrying home type information of carrying according to the IP address of UE, and, other network entity, such as gateway, also can be according to the UE IP address allocated, the carrying of finding this IP address to set up, and the carrying that this IP address has been set up is as the carrying home type information of obtaining.Present embodiment can not process in step 201 yet, after MME receives the request resource message of 201 steps, produce the carrying home type, the method of its generation is: MME searches the carrying that the IP address has been set up, and the carrying home type of this IP address having been set up carrying is as the carrying home type information that produces.

If support the proprietary IP-CAN carrying flow process that UE initiates, then carry home type information and also can bring eNB, and and then send to UE by the Radio Resource connection request message that eNB sends to UE by the radio resource request message that MME/UPE sends to eNB.Handling process is similar.

Certainly, not getting rid of MME/UPE utilizes other message that send to UE to carry carrying home type information in the IP-CAN loading establishing process.

Embodiment three:

Present embodiment is established as example with the IP-CAN of GPRS network carrying and describes, Fig. 3 obtains the method flow schematic diagram of the home type information of IP-CAN carrying for GPRS network in the third embodiment of the invention, referring to Fig. 3, universal grouping wireless business supporting node (SGSN, Serving GPRSSupporting Node) is used to realize routing forwarding, mobile management, functions such as session management and user profile storage, ggsn (GGSN, Gateway GPRSSupporting Node) is the gateway of GPRS network and external network, also is responsible for realizing the transmission of user face data simultaneously.

When MS need carry out business, first initiation packet data protocol (PDP, Packet DataProtocol) activation process, set up PDP Context.In MS transmission activation PDP Context response message, carry this PDP carrying of carrying home type information flag at SGSN and belonged to local network or far-end network.Except the IMS urgency traffic must consider whether to use the routing optimality function for other IMS service needed according to routing policy outside local network (be visit ground during the MS roaming, otherwise be ownership place) finishes.Concrete steps shown in Figure 3 are as follows:

Step 301:MS sends the PDP Context request that activates by RNC to SGSN.

Step 302:SGSN carries out authentication to MS.

Step 303:SGSN sends the PDP Context request of setting up to GGSN.

Step 304:GGSN sends to SGSN and sets up the PDP Context response.

Step 305: between SGSN and MS, set up RAB.

Step 306:SGSN sends the PDP Context request of upgrading to GGSN.

Step 307:GGSN sends to SGSN and upgrades the PDP Context response.

Step 308:SGSN sends to MS by RNC and activates the PDP Context response.

In the present embodiment, SGSN sends the activation PDP Context response of carrying carrying home type information by RNC to MS.Session management module among the SGSN produces carrying home type information, and similar among the method for its generation and the embodiment one promptly obtains the gateway address that IP-CAN carries, and is the GGSN address in the present embodiment; Whether the GGSN address of judging the IP-CAN carrying of obtaining is the address of local network, if then this IP-CAN is carried as the carrying of local network, the carrying home type information of generation is local network, otherwise the carrying home type information of generation is far-end network.In the present embodiment, the method that SGSN obtains the GGSN address is: SGSN obtains the message of carrying Access Point Name (APN, Access Point Name), carries out dns resolution according to this APN and obtains the GGSN address.Whether according to this GGSN is that the address of local network judges that this carrying belongs to local network or far-end network, if promptly this GGSN is a local network, then this is carried as local network; Otherwise this is carried as far-end network.

Carrying home type information is a special data that can be used to judge, can be to be used for representing a public land mobile network (PLMN, Pubilc Land Mobile Network) the mobile network No.+mobile national number (MNC+MCC in the information, Mobile Network Code/Mobile CountryCode), also can add other information etc. as required.

Step 309:MS preserves carrying home type information.

In the present embodiment MS will carry home type information directly and the IP-CAN bearer context be kept at together, MS can utilize carrying home type information according to business need, selects suitable IP-CAN to carry.

Also can be after MS receives carrying home type information in the present embodiment, this home type value of information is saved in the address home type information of IP address, MS can be according to business need, utilize address home type information, select suitable IP address, select IP-CAN carrying suitable in this IP address again.

Present embodiment can also carry the address home type information of the IP address of UE in step 308, then UE can be directly be kept at the address home type information received and the IP address of UE together in the step 309.

Present embodiment provides is the method for carrying carrying home type information in the handling process that activates of Iu pattern PDP, if in the handling process that A/Gb pattern PDP activates, send to activate to MS at SGSN equally and carry carrying home type information in the PDP Context response message, just step 303 changes into: carry out the packet data content process between BSS and the SGSN.

If present embodiment is to set up flow process by the IP-CAN carrying that network side is initiated, then SGSN can send a PDP Context to MS earlier and set up request message, after MS receives this message, set up the foundation that flow process is finished PDP Context according to the IP-CAN carrying that MS initiates, all the other steps can be identical with step 302-step 309, promptly can send activate to have carried in the PDP Context response message to MS and characterize this IP-CAN carrying and belong to the carrying home type information that local network still is a far-end network at SGSN, if at user terminal under the situation of distributing IP address, also can obtain the method for carrying home type information according to the IP address according to what adopt among the embodiment two.

By to the embodiment of the invention one, two and three step analysis as can be seen: user terminal is when first carrying of setting up the IP-CAN session, gateway can distribute an IP address for this user terminal, and set up in carrying and to bring user terminal in the response message, the home type that the carrying home type that user terminal also can utilize loading establishing process to obtain is come this IP address of mark.User terminal tends to select one to meet the IP address that home type requires according to the requirement of business earlier when carrying out business, according to the suitable carrying of this IP address choice, perhaps sets up new carrying again, finishes business.

Carrying home type information can all send to UE or network side in each IP-CAN loading establishing process, thereby UE or network side can get access to the carrying home type information of each IP-CAN carrying.Also can only set up in the flow process and transmit carrying home type information to UE in first carrying of each IP-CAN session, and when other carryings of this IP-CAN session are set up, all bearer contexts in this IP-CAN session are shared identical context IP address, also share identical carrying home type information and carrying positional information.

When UE or network side need use IP-CAN to carry to carry out business, UE or network side can be according to the carrying home type information of obtaining, select the IP-CAN carrying, embodiment four, embodiment five and embodiment six have provided the home type Information Selection carrying that UE or network side utilization obtain and have carried out three kinds of professional application scenarioss, be respectively: when UE can not discern the IMS urgency traffic, utilize the home type information of obtaining to realize the process that the IP-CAN carrying is selected; When UE can discern the IMS urgency traffic, home type information that utilization is obtained realizes process that the IP-CAN carrying is selected and as UE the time with being in visit, for the non-emergent business of supporting the routing optimality function, utilize the home type information of obtaining to realize the process that the IP-CAN carrying is selected.

Embodiment four:

Fig. 4 is for utilizing the method flow schematic diagram of home type information acquisition IP-CAN carrying in the four embodiment of the invention.In the present embodiment, suppose that UE can not discern the IMS urgency traffic, then when UE need use IMS professional, UE can select the IP-CAN carrying at random in normal registration after the IMS system, initiate a normal IMS session and set up request message to the P-CSCF of local network or the P-CSCF of far-end network.When UE has just selected IP-CAN when carrying of local network, then by prior art, the E-CSCF that emergent operation request is given to local network by the P-CSCF of local network handles, and does not give unnecessary details one by one here.If UE has selected the IP-CAN carrying of far-end network, then execution in step 401-step 409.

Step 401:UE sends the IMS session to far-end P-CSCF and sets up request.

Step 402: far-end P-CSCF detects the IMS session and sets up request at a urgency traffic.

Step 403: far-end P-CSCF sends refusal IMS session to UE and sets up request message.

Because the IMS urgency traffic must be finished at local network, if promptly UE is in roaming state, then can only carry out the IMS urgency traffic on visit ground, so request is set up in the session of the P-CSCF of ownership place refusal UE, and notice UE initiates emergent operation request at local network.

Step 404:UE judges whether local network exists available IP-CAN carrying, if exist, the local network IP-CAN carrying of then selecting to have existed is as the IP-CAN carrying that sends the request of IMS emergent session, execution in step 406; Otherwise, execution in step 405.

In the present embodiment, UE utilizes the carrying home type information of preserving, and judges whether to exist the local network IP-CAN carrying of the relevant signaling of transmission IMS.In the present embodiment, can adopt the method for the combination in any of any one method of providing among embodiment one, two and three or three kinds of methods, obtain and preserve carrying home type information.

In the present embodiment, UE also can utilize the address home type information of the user terminal IP address of preservation, judge whether to exist the address home type to satisfy the user terminal IP address of carrying home network requirement, if, after selecting to satisfy the IP address of carrying home network requirement, according to IP-CAN carrying of this IP address choice, otherwise newly-built one is satisfied the IP-CAN carrying that the carrying home network requires.

Step 405:UE initiates the IMS emergency bearing and sets up process.

In the present embodiment, UE sets up process by initiating the IMS emergency bearing, sets up the IP-CAN carrying that is exclusively used in the request of transmission IMS emergent session.

Step 406:UE initiates the IMS Emmergency log-on.

If UE registers, then do not need to carry out this step in the IMS of this locality network.

In the present embodiment, UE utilizes local carrying to carry out the IMS Emmergency log-on.

Step 407:UE sends the request of IMS emergent session to the P-CSCF of local network.

In the present embodiment, UE is when existing the local network IP-CAN carrying of the relevant signaling of transmission IMS, utilize already present IP-CAN carrying, when not having local network IP-CAN carrying, utilize the newly-built IP-CAN carrying that is exclusively used in the request of transmission IMS emergent session the request of IMS emergent session to be sent to the P-CSCF of local network.

In the present embodiment, after execution of step 407, the P-CSCF of local network can be given to emergent operation request local E-CSCF, and local E-CSCF does further processing to urgency traffic.

In the present embodiment, UE utilizes home type information, preferentially selects already present local network IP-CAN carrying, can make full use of existing IP-CAN bearing resource, reduces the time delay of command transmitting or data, improves user experience.

Embodiment five:

Fig. 5 is for utilizing the method flow schematic diagram of home type information acquisition IP-CAN carrying in the fifth embodiment of the invention.In the present embodiment, what suppose that UE can identify initiation is the IMS urgency traffic, then when UE need use IMS professional, and execution in step 501-step 505.

Step 501:UE judges whether local network exists available IP-CAN carrying, if exist, and execution in step 503, otherwise, execution in step 502.

UE utilizes home type information to judge whether local network exists the IP-CAN carrying of satisfying the requirement of bearer network ownership, if exist, then directly select can be used to of having existed to transmit the local network IP-CAN carrying of the relevant signaling of IMS as the IP-CAN carrying that sends the request of IMS emergent session according to home type information.

In the present embodiment, UE utilizes the carrying home type information of preserving, and judges whether to exist the IP-CAN carrying of local network.In the present embodiment, can adopt the method for the combination in any of any one method of providing among embodiment one, two and three or three kinds of methods, obtain and preserve carrying home type information.

Step 502:UE initiates the urgent IP-CAN loading establishing process of IMS.

In the present embodiment, UE is by initiating the urgent IP-CAN loading establishing process of IMS, set up to be exclusively used in the IP-CAN carrying of transmission IMS emergent session request.

Step 503:UE initiates the IMS Emmergency log-on.

If UE registers at local IMS network, then do not need to carry out this step.

In the present embodiment, UE utilizes existing local network can transmit the IP-CAN carrying of IMS signaling or the newly-built IP-CAN that is exclusively used in the request of transmission IMS emergent session and carries and initiate the IMS Emmergency log-on.

Step 504:UE sends to the request of IMS emergent session the P-CSCF of local network.

In the present embodiment, after execution of step 504, the P-CSCF of local network can be given to E-CSCF with emergent operation request, and E-CSCF does further processing to urgency traffic.

Embodiment six:

Fig. 6 is for utilizing the method flow schematic diagram of home type information acquisition IP-CAN carrying in the sixth embodiment of the invention.In the present embodiment, suppose that MS can judge whether business needs the routing optimality function.The method of judging comprises: after MS was registered to the IP-CAN bearer network, MS can get access to service lists, and this tabulation has comprised business and whether needed to carry out route optimisation process.Present embodiment supposition service needed is carried out the routing optimality function, and requires business to carry out at local network.When MS uses IMS professional, execution in step 601.

Step 601: according to the suitable IP-CAN carrying of home type information acquisition.

In the present embodiment, if MS is in ownership place, then all IP-CAN carryings of MS foundation, its IP-CAN bearer types is local network, so the business that MS initiates can be judged the request of the just direct transmission IMS of carrying home type information service conversation.

If have the local network carrying, then select the carrying of a suitable transmission IMS conversation request.When finding not exist, MS initiates the carrying of the newly-built transmission IMS conversation request of IMS loading establishing process.

MS judges that according to home type information whether local network exists the carrying that can be used to transmit the relevant signaling of IMS, if exist, then selects the carrying of a suitable transmission IMS conversation request.When finding not exist, MS initiates the carrying of the newly-built transmission IMS conversation request of loading establishing process.In the present embodiment, can adopt the method for the combination in any of any one method of providing among embodiment one, two and three or three kinds of methods, obtain and preserve carrying home type information.

In the present embodiment, require the service request of current initiation to carry out at local network, if MS is in visit ground, then MS carries the IMS service conversation request of transmitting according to the IP-CAN of the relevant signaling of transmission IMS in the home type Information Selection local network.

Finish if present embodiment requires the service request of current initiation must get back to ownership place, so, the MS that is in visit ground can carry the IMS service conversation request of transmitting according to the IP-CAN of the relevant signaling of transmission IMS in the home type Information Selection far-end network.

Step 602:MS sends the IMS conversation request to local P-CSCF.

The P-CSCF of IMS network is after receiving this session service request, can be according to method of the prior art, through the service call session control function entity (S-CSCF in the IMS network, Serving-CallSession Control Function) handles, be transmitted to professional destination, then, P-CSCF is after the conversational response that receives professional destination transmission, initiate the IP-CAN carrying of a network side requirement and set up flow process, set up a new IP-CAN and carry this business of transmitting.

In the present embodiment, when UE is in visit ground, and when visit ground and ownership place at least respectively have an IP-CAN that can transmit the relevant signaling of IMS to carry, can utilize the suitable IP-CAN carrying of carrying home type Information Selection, thereby can satisfy the different requirements of different business, realize the routing optimality function the IP-CAN carrying.Can certainly utilize one of address home type Information Selection to meet the IP address of carrying home network requirement, again according to the suitable carrying of this IP address choice, when not satisfying the IP address of carrying home network requirement, set up a new IP-CAN carrying, finish the IMS business.

Except that the IMS business, other business such as IP phone (VoIP, Voice over IP), Virtual Private Network (VPN, Virtual Private Network), internet (Internet) etc. and IMS service class are seemingly, with the internet service is example, when if roaming has taken place in UE, UE initiates the internet service request, if this service needed is finished with visiting, then UE selects the IP address that home type is a local network, and transmits data according to the carrying that one of this IP address choice can the transmitting internet business datum; If not having home type is the IP address of local network, then UE can initiate a carrying to visit ground and set up request, obtains the IP address on a visit ground, and set up one can the internet service data carrying transmit data.

In addition, when the switching between UE generation visit ground and the ownership place, will be with the carrying among original PLMN of being connected to that has existed, transfer on the new PLMN, therefore, need upgrade the home type information that UE or network side have been stored, start again after UE arrives a PLMN, then UE can initiate attachment flow at new PLMN, rebuild the IP-CAN bearer context, again obtain new home type information, treatment step as the present invention first and second or three in embodiment shown in step similar.

And after UE start moves to another PLMN from a PLMN, or when roaming in the same PLMN takes place, need carry out hand-off process.If UE is carrying out business, then will be to the IP-CAN bearer update home type information of current activation.Embodiment seven to embodiment eight has provided when visit ground and ownership place switching take place user terminal, the method example of the home type information of updated stored, and home type information is carrying home type information or address home type information here.

Embodiment seven

Present embodiment provides when visit ground and ownership place switching take place user terminal, and user terminal is initiated the renewal process to the home type information of having stored after hand-off process is finished.In the present embodiment, when UE obtains home type information in the IP-CAN loading establishing process, obtain simultaneously and storing IP-residing carrying positional information when the CAN carrying is set up, the carrying positional information can be a PLMN information.Obtain and storing IP-method of residing carrying positional information was when CAN carrying was set up: when the angelica type information was local network, the carrying positional information of storage was identical with the positional information at MME place; When the angelica type information is far-end network, according to the sign of UE, as international mobile station identity number (IMSI, International Mobile Station Identify), obtain the ownership carrying positional information of this UE, as the carrying positional information of this IP-CAN carrying.

Like this, after switching between visit ground and ownership place is taking place in UE, obtain IP-CAN carrying present located carrying positional information, residing carrying positional information was compared with the carrying positional information after the switching when IP-CAN carrying was set up, if comparative result is identical, be local network then with the home type information updating corresponding with the IP-CAN carrying, otherwise, be far-end network with the home type information updating corresponding with the IP-CAN carrying.Such as, when UE was mobile between different PLMN, residing carrying positional information just can be upgraded the home type information of this IP-CAN carrying in the time of only need setting up according to the IP-CAN carrying of current PLMN information and storage.

Present embodiment is an example with the concrete steps of SAE network:

At first: UE receives the signaling message that comprises new PLMN information from the RAN that switches back evolution.

For UE, after hand-off process finishes, can receive the message that comprises PLMN information of the RAN transmission of evolution, such as the MNC+MCC among the RAI.

Then, UE is according to the PLMN information of preserving and receive PLMN information comparative result, upgrades home type information.

UE checks the PLMN information of receiving, PLMN information when setting up with every IP-CAN carrying of preserving among the UE compares, if the PLMN information when the IP-CAN carrying is set up is identical with current PLMN information, then the home type information updating with this IP-CAN carrying is a local network, otherwise the home type information updating that this IP-CAN is carried is a far-end network.

Certainly, if when home type information is used the method for expressing of embodiment three, when just home type information is represented with the carrying positional information, such as, during with the PLMN information representation, then when UE switches, the renewal that can carry out home type information is handled and it is judged.UE can preserve the PLMN information of current network, so when selecting the IP-CAN carrying, can compare according to each home type value of information and current network PLMN information, which can be judged belong to local network, and which belongs to far-end network.

Embodiment eight

When visit ground and ownership place switching take place in UE, network side need carry out the renewal process in switching of user's face and route district, the entity MME or the UPE at SM place, or SGSN can be to gateway device, as gateway or GGSN, initiate the updating context flow process, finish the renewal of user's face relevant information on gateway, such as the renewal of information such as the address information of finishing current SM place equipment and contextual sign.

Fig. 7 is the method flow schematic diagram that upgrades home type information in the eighth embodiment of the invention, user's face that present embodiment has provided in GPRS network switches, the PDP Context renewal process of initiating by the entity SGSN at SM place, thereby realize renewal to the home type information of having set up, referring to Fig. 7, specifically may further comprise the steps:

The SRNS reorientation is carried out in step 701: source RNC (source RNC) decision

Step 702: source RNC sends re-positioning request to old SGSN (Old SGSN).

Step 703: old SGSN is transmitted re-positioning request to new SGSN (New SGSN).

Step 704: new SGSN sends re-positioning request to Target RNC (Target SGSN).

Step 705: Target RNC returns the re-positioning request response to new SGSN.

In the present embodiment, after setting up radio bearer between new SGSN and Target RNC, Target RNC returns the re-positioning request response to new SGSN.

Step 706: new SGSN transmits the re-positioning request response to old SGSN.

Step 707: old SGSN sends the reorientation order to source RNC.

Step 708: source RNC sends data to Target RNC.

Step 709: source RNC sends reorientation to Target RNC and confirms.

Step 710: Target RNC sends reorientation to new SGSN and detects.

Step 711: Target RNC sends the RAN mobile message to MS.

Step 712:MS sends the RAN mobile message to Target RNC and confirms.

Step 713: Target RNC sends reorientation to new SGSN and finishes message.

Step 714: new SGSN transmits reorientation to old SGSN and finishes message.

Step 715: old SGSN sends reorientation to new SGSN and finishes message response.

Step 716: whether the home type information of judging storage needs to revise, if, when execution in step 717, carry amended home type information, otherwise, amended home type information when execution in step 717, do not carried.

In the present embodiment, new SGSN compares according to the positional information in active user residing PLMN position and the PDP Context preserved, judges whether the home type of the IP-CAN carrying of having set up needs modification.

In order to satisfy above processing, requirement has all kept home type information on the entity (as MME or UPE, gateway device such as the GGSN or the Anchor etc. at UE, SM place) that PDP Context exists, simultaneously keep this contextual carrying positional information in the MME at SM place or the PDP Context on the UPE, the carrying positional information can be that PLMN numbers.In the time of can in the IP-CAN loading establishing process, obtaining home type information, obtain simultaneously and storing IP-residing carrying positional information when the CAN carrying is set up, obtain and storing IP-method of residing carrying positional information was when CAN carrying was set up: when the angelica type information was local network, the carrying positional information of storage was identical with the positional information at MME place; When the angelica type information was far-end network, according to the sign of UE, the ownership of obtaining this UE as IMSI was carried positional information, as the positional information of this carrying.Like this when visit ground and ownership place take place and switch in UE (Inter-PLMN/Intra-PLMN), can be from the modification process of network side initiation to home type information.As shown in table 1.

	UE	SM(MME、UPE、SGSN)	GGSN, SAE anchor, 3GPP anchor
	UE	SM(MME、UPE、SGSN)	GGSN, SAE anchor, 3GPP anchor	Home type information	×	×	×
The carrying positional information		×		Home type information	×	×	×

Table 1

Step 717: new SGSN sends the PDP Context request of upgrading to GGSN.

In the present embodiment, new SGSN sends the renewal PDP Context request of carrying amended home type information to GGSN.

Step 718:GGSN sends to new SGSN and upgrades PDP Context request response.

Step 719-step 720 is an optional step, carries out when needs are revised the home type information of MS storage.

Step 719: new SGSN sends the PDP Context request of upgrading to MS.

In the present embodiment, new SGSN sends the renewal PDP Context request of carrying amended home type information to MS.

Step 720:MS sends to new SGSN and upgrades PDP Context request response.

If present embodiment, the PDP Context renewal process of initiating by the entity SGSN notification gateway at SM place, then after execution of step 718, GGSN judges whether to revise the step of home type information, the method of judging is: GGSN checks the home type information that comprises in the message, if with this locality preserve inconsistent, then judging needs to revise home type information.If do not comprise home type information in the updating context message of receiving, then this value do not checked.

After judging needs modification home type information, GGSN initiates the PDP context modification flow process, and revising the home type information of preserving among the UE is last look.Promptly send the renewal PDP Context request of carrying amended home type information by GGSN to new SGSN, new SGSN transmits the renewal PDP Context request of carrying amended home type information to MS.

Step 721: old SGSN sends Iu carrying release command to source RNC.

Step 722: source RNC sends Iu carrying Release complete to old SGSN.

Execute this step, also just execute the flow process that user's face switches, network side can continue the route district is upgraded.

Embodiment nine

Fig. 8 is the method flow schematic diagram that upgrades home type information in the ninth embodiment of the invention.Present embodiment has provided when GPRS network is carried out the switching of user's face, home type information is not upgraded, but in user's Routing Area Update flow process, realization is to the renewal of the home type information of storage, referring to Fig. 8, preserved user's CAMEL-Subscription-Information in the attaching position register (HLR, Home Location Register).Fig. 8 is that the entity SGSN notification gateway at SM place is initiated more new technological process of PDP Context, specifically may further comprise the steps:

Step 801:MS sends the Routing Area Update request to new SGSN.

Carry out authentication between step 802:MS and the HLR.

Step 803: new SGSN judges whether the home type of the IP-CAN carrying of having set up needs to revise, if, execution in step 804, otherwise, direct execution in step 811.

In the present embodiment, new SGSN earlier to keep in current carrying positional information and the bearer context set up the time the carrying positional information compare, if comparative result is identical, be local network then with the home type information updating corresponding with the IP-CAN carrying, otherwise, be far-end network with the home type information updating corresponding with the IP-CAN carrying.If type affiliation of upgrading and local preserve inconsistent, then judging needs to revise home type information, needs execution in step 804, otherwise execution in step 811.

Step 804: new SGSN sends the PDP Context request of upgrading to GGSN.

In the present embodiment, new SGSN sends the renewal PDP Context request of carrying amended home type information to GGSN.New SGSN is included in amended home type information in the updating context request message that sends to gateway, and certainly, whether present embodiment also can be included in up-to-date home type information in the updating context request message regardless of needing to revise all.

Step 805:GGSN sends to new SGSN and upgrades PDP Context request response.

Step 806:GGSN judges whether to revise home type information.

GGSN after receiving amended home type information, check home type information whether with this locality preserve inconsistent, if then will revise the home type information of preserving among the UE is last look.Otherwise, direct execution in step 807.If do not comprise home type information in the updating context message of receiving, then this value do not checked.

Step 807:GGSN sends the PDP Context request of upgrading to new SGSN.

In the present embodiment, GGSN sends the renewal PDP Context request of carrying amended home type information to new SGSN.

Step 808: new SGSN sends the PDP Context request of upgrading to MS.

Step 809:MS sends to new SGSN and upgrades PDP Context request response.

MS upgrades the carrying home type of corresponding IP-CAN carrying and the address home type of IP address according to the home type information that parses from upgrade the PDP Context request response in the present embodiment.

Step 810: new SGSN sends to GGSN and upgrades PDP Context request response.

Step 811: carry out the position between new SGSN and the HLR and upgrade processing.

Step 812: new SGSN sends Routing Area Update to MS and receives message.

Step 813:MS sends Routing Area Update to new SGSN and finishes message.

If present embodiment is initiated the PDP Context renewal process by the entity SGSN at SM place, then after execution of step 805, direct execution in step 808.

In the present embodiment, step 803-step 810 also can be carried out after step 811 is complete.

Embodiment ten

The system configuration schematic diagram that the acquisition IP-CAN that Fig. 9 provides for the embodiment of the invention carries.This system comprises acquisition module 920 and Executive Module 930;

Acquisition module 920 obtains and the corresponding home type information of IP-CAN carrying home network, and the home type information of obtaining is sent to Executive Module 930;

Executive Module 930 utilizes the home type information acquisition of acquisition module 920 inputs to satisfy the IP-CAN carrying that the carrying home network requires.

This system also comprises home type generation module 910; When home type generation module 910 is set up carrying at user terminal, produce home type information, and home type information is sent to acquisition module 920.

This system also comprises update module 940; When update module 940 at user terminal switching between visit ground and the ownership place takes place, the home type information of obtaining in the acquisition module 920 is upgraded or judged.

The angelica type information is that acquisition module 920 comprises input unit 921 and resolution unit 922 when sending to acquisition module 920 by the message of carrying home type information;

Input unit 921 receives the message of carrying carrying home type or address home type information, and the message of carrying carrying home type or address home type information that receives is sent to resolution unit 922;

Resolution unit 922 is resolved the message of carrying carrying home type information or address home type that input unit 921 sends, and obtains and the corresponding home type information of IP-CAN carrying home network.

In the present embodiment, when user terminal had distributed the IP address, acquisition module 920 comprised memory cell and determining unit;

Memory cell, the storage user terminal IP address has been set up the carrying home type of carrying or the address home type of user terminal IP address;

Determining unit, user terminals stored IP address has been set up address home type or the carrying home type of the carrying home type of carrying as user terminal IP address, perhaps with the address home type of user terminals stored IP address as the carrying home type, the home type information of determining is input to Executive Module.

Executive Module 930 comprises judging unit 931 and performance element 932;

Judging unit, be used for according to the home type information of business the requirement and the acquisition module input of carrying home network, judge current IP-CAN carrying or the user terminal IP address that whether exists the address home type to satisfy the requirement of carrying home network, the result who judges is input to performance element;

Performance element, when the judged result that is used for importing when judging unit is carried for the IP-CAN that exists satisfied carrying home network to require, select one to satisfy the IP-CAN carrying that the carrying home network requires, the judged result of importing when judging unit is when having the user terminal IP address that satisfies the requirement of carrying home network, according to IP-CAN carrying of this IP address choice, otherwise a newly-built IP-CAN carrying of satisfying the requirement of carrying home network.

Home type generation module 910 comprises address acquisition unit 912 and generation unit 911;

Address acquisition unit 912 is obtained the gateway address of IP-CAN carrying or the gateway address of distributing user IP address, and the gateway address that obtains is sent to generation unit 911;

Generation unit 911 judges whether the gateway address of address acquisition unit 912 inputs is addresses of local network, if then the home type information of Chan Shenging is the carrying of local network, otherwise the home type information of generation is far-end network.

Update module 940 comprises carrying position acquiring unit 941 and carrying position comparing unit 942;

Carrying position acquiring unit 941 obtains and storing IP-residing carrying positional information when the CAN carrying is set up; And after the switching that takes place between visit ground and ownership place, obtain IP-CAN carrying present located carrying positional information, with obtain set up the time and switch after the carrying positional information be input to carrying position comparing unit 942;

Carrying position comparing unit 942, during with the setting up of carrying positional information input and switch back carrying positional information and compare, if comparative result is identical, be local network then with the home type information updating corresponding with the IP-CAN carrying, otherwise, be far-end network with the home type information updating corresponding with the IP-CAN carrying.

MME, UPE, MME and the UPE that home type generation module 910 can be arranged on the SAE network close in the entity of establishing or the SGSN entity of GPRS network in.

Acquisition module 920 can be arranged among user terminal, gateway or the GGSN.

Executive Module 930 can be arranged among user terminal, gateway or the GGSN.

MME, UPE, MME and the UPE that update module 940 can be arranged on the SAE network close in the entity of establishing or the SGSN entity of GPRS network in.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. one kind obtains the method that IP connects Access Network IP-CAN carrying, it is characterized in that, this method comprises: obtain and the corresponding home type information of IP-CAN carrying home network, utilize the home type information of obtaining, be met the IP-CAN carrying of carrying home network requirement.

2. method according to claim 1 is characterized in that, the described method of obtaining home type information comprises: carry the message of home type information by parsing, obtain and the corresponding home type information of IP-CAN carrying home network.

3. method according to claim 2, it is characterized in that described message of carrying home type information comprises: the wireless IP-CAN carrying in the IP-CAN loading establishing process is set up request message, is adhered to reception message or the activation packet data protocol PDP Context response message in the packet data protocol pdp context activation.

4. method according to claim 1, it is characterized in that, described home type information is for characterizing the carrying home type information of IP-CAN carrying home network, when user terminal has distributed the IP address, the described method of obtaining home type information comprises: according to the user terminal IP address allocated, search this IP address and set up the carrying home type of carrying, the carrying home type of this IP address having been set up carrying is as the carrying home type information of obtaining, perhaps with the address home type of this IP address as the carrying home type information of obtaining.

5. method according to claim 1, it is characterized in that, described home type information is for characterizing the address home type information of user terminal IP address home network, when user terminal had distributed the IP address and used the newly-built carrying in this IP address, the described method of obtaining home type information comprised: with the carrying home type of the newly-built carrying address home type information as this IP address.

6. method according to claim 1, it is characterized in that, described home type information is the carrying home type, the method that the carrying home type information acquisition that described utilization is obtained satisfies the IP-CAN carrying that the carrying home network requires comprises: according to the carrying home type information of business to the requirement of carrying home network and the IP-CAN carrying of obtaining, judge the current IP-CAN carrying of satisfying the requirement of carrying home network that whether exists, if, select an IP-CAN carrying, otherwise newly-built one is satisfied the IP-CAN carrying that the carrying home network requires.

7. method according to claim 1 is characterized in that, described home type information is the address home type, and the method for the IP-CAN carrying that the satisfied carrying of the carrying home type information acquisition that described utilization is obtained home network requires comprises:

According to business to the requirement of carrying home network and the address home type information of the user terminal IP address that obtains, judge whether to exist the address home type to satisfy the user terminal IP address of carrying home network requirement, if, after selecting to satisfy the IP address of carrying home network requirement, according to IP-CAN carrying of this IP address choice, otherwise newly-built one is satisfied the IP-CAN carrying that the carrying home network requires.

8. method according to claim 1 is characterized in that, before the described step of obtaining home type information, this method further comprises: produce home type information.

9. method according to claim 8, it is characterized in that, described home type information is the carrying home type, the method of described generation home type information comprises: according to the gateway address of the IP-CAN carrying of obtaining or according to the carrying ownership strategy that sets in advance, produce carrying home type information.

10. method according to claim 9 is characterized in that, the gateway address of the IP-CAN carrying that described basis is obtained, and the method that produces carrying home type information comprises: the gateway address that obtains the IP-CAN carrying; Whether the gateway address of judging the IP-CAN carrying of obtaining is the address of local network, if then this IP-CAN is carried as the carrying of local network, the carrying home type information of generation is local network, otherwise the carrying home type information of generation is far-end network.

11. method according to claim 8 is characterized in that, described home type information is the address home type, and the method for described generation home type information comprises:

According to the gateway address of distributing user IP address of terminal or according to the address ownership strategy that sets in advance, produce address home type information.

12. method according to claim 11 is characterized in that, described gateway address according to the distributing user IP address of terminal, and the method that produces address home type information comprises: the gateway address that obtains the distributing user IP address of terminal; Whether the gateway address of judging the distributing user IP address of terminal that obtains is the address of local network, if, the then carrying that is carried as local network of this IP address, the address home type information of generation is local network, otherwise the address home type information of generation is far-end network.

13. according to claim 1 or 8 described methods, it is characterized in that, when switching between visit ground and the ownership place takes place in user terminal, before the step of home type Information Selection IP-CAN that utilization is obtained carrying, this method further comprises: the home type information of obtaining is upgraded or judged.

14. method according to claim 13 is characterized in that, describedly the home type information of obtaining is carried out method for updating comprises:

Obtain and storing IP-residing carrying positional information when the CAN carrying is set up; After the switching that takes place between visit ground and ownership place, obtain IP-CAN carrying present located carrying positional information, residing carrying positional information was compared with the carrying positional information after the switching when IP-CAN carrying was set up, if comparative result is identical, be local network then with the home type information updating corresponding with the IP-CAN carrying, otherwise, be far-end network with the home type information updating corresponding with the IP-CAN carrying.

15. method according to claim 14 is characterized in that, described obtain and bank switching before the IP-CAN method of carrying residing carrying positional information comprise:

When the angelica type information was local network, the carrying positional information of storage was identical with the positional information at MME place; When the angelica type information is far-end network,, obtain the ownership carrying positional information of this UE, as the positional information of this carrying according to the sign of UE.

16., it is characterized in that described carrying positional information comprises public land mobile network PLMN positional information according to claim 14 or 15 described methods.

17. method according to claim 13 is characterized in that, when home type information was represented with carrying positional information form, the described method that the home type information of obtaining is judged comprised:

Home type information before switching is compared with the carrying positional information after the switching,, judge that then the home type information corresponding with the IP-CAN carrying is local network if comparative result is identical, otherwise, be far-end network.

18. a system that obtains the IP-CAN carrying is characterized in that this system comprises acquisition module and Executive Module;

Described Executive Module is used to utilize the home type information from acquisition module that receives, and is met the IP-CAN carrying of carrying home network requirement.

19. system according to claim 18 is characterized in that, described home type information is to send to acquisition module by the message of carrying home type information, and described acquisition module comprises input unit and resolution unit;

Described input unit is used to receive the message of carrying home type information, and the message of carrying home type information that receives is sent to resolution unit;

Described resolution unit is used for the message of carrying home type information that input unit sends, and obtains and the corresponding home type information of IP-CAN carrying home network.

20. system according to claim 18 is characterized in that, described acquisition module comprises memory cell and determining unit;

Described memory cell is used to store user terminal IP address and has set up the carrying home type of carrying or the address home type of user terminal IP address;

Described determining unit, be used for user terminals stored IP address has been set up address home type or the carrying home type of the carrying home type of carrying as user terminal IP address, perhaps with the address home type of user terminals stored IP address as the carrying home type, the home type of determining is sent to Executive Module.

21., it is characterized in that described acquisition module is arranged among user terminal, gateway or the GGSN according to claim 18,19 or 20 described systems.

22. system according to claim 18 is characterized in that, described Executive Module comprises judging unit and performance element;

Described judging unit, be used for according to the home type information of business the requirement and the acquisition module input of carrying home network, judge current IP-CAN carrying or the user terminal IP address that whether exists the address home type to satisfy the requirement of carrying home network, the result who judges is input to performance element;

Described performance element, when the judged result that is used for importing when judging unit is carried for the IP-CAN that exists satisfied carrying home network to require, select one to satisfy the IP-CAN carrying that the carrying home network requires, the judged result of importing when judging unit is when having the user terminal IP address that satisfies the requirement of carrying home network, according to IP-CAN carrying of this IP address choice, otherwise a newly-built IP-CAN carrying of satisfying the requirement of carrying home network.

23., it is characterized in that described Executive Module is arranged among user terminal, gateway or the GGSN according to claim 18 or 22 described systems.

24. system according to claim 18 is characterized in that, this system further comprises the home type generation module;

Described home type generation module is used to produce home type information, and home type information is sent to acquisition module.

25. system according to claim 24 is characterized in that, described home type generation module comprises address acquisition unit and generation unit;

Described address acquisition unit is used to obtain the gateway address of IP-CAN carrying or the gateway address of distributing user IP address, and the gateway address that obtains is sent to generation unit;

Described generation unit is used to judge whether the gateway address of address acquisition unit input is the address of local network, if then the home type information of Chan Shenging is the carrying of local network, otherwise the home type information of generation is far-end network.

26., it is characterized in that described home type generation module is arranged on MME, UPE, MME and UPE and closes in the entity of establishing or SGSN according to claim 24 or 25 described systems.

27., it is characterized in that this system further comprises update module according to claim 18 or 24 described systems;

Described update module is used for when switching between visit ground and the ownership place takes place user terminal, and the home type information of obtaining in the acquisition module is upgraded or judged.

28. system according to claim 27 is characterized in that, described update module comprises: carrying position acquiring unit and carrying position comparing unit;

Described carrying position acquiring unit is used to obtain and storing IP-residing carrying positional information when the CAN carrying is set up; And after the switching that takes place between visit ground and ownership place, obtain IP-CAN carrying present located carrying positional information, with obtain set up the time and switch after the carrying positional information be input to carrying position comparing unit;

Described carrying position comparing unit, when being used for and switch back carrying positional information and compare with the setting up of carrying positional information input, if comparative result is identical, be local network then with the home type information updating corresponding with the IP-CAN carrying, otherwise, be far-end network with the home type information updating corresponding with the IP-CAN carrying.

29. system according to claim 27 is characterized in that, described update module is arranged on MME, UPE, MME and UPE and closes in the entity of establishing or SGSN.