CN102986271B

CN102986271B - The acquisition methods of bearing identification of target side carrying, bearer management network element and packet data gateway

Info

Publication number: CN102986271B
Application number: CN201080001705.5A
Authority: CN
Inventors: 吴问付; 王珊珊; 李欢
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2010-06-28
Filing date: 2010-06-28
Publication date: 2015-08-19
Anticipated expiration: 2030-06-28
Also published as: WO2011085578A1; CN102986271A

Abstract

Disclose carrying establishing method, device and system.Carrying establishing method wherein comprises: at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, bearer management network element is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and know in target side system and also use GTP, then bearer management network element obtains the bearing identification of the source carrying of described terminal equipment, the bearing identification that the bearing identification that described source carries by bearer management network element carries as the target side of described terminal equipment, or, bearing identification in the session establishment response message that bearer management network element acquisition PGW sends and indication information, wherein said carrying is denoted as the bearing identification of source carrying, the bearing identification that the bearing identification that described source carries according to indication information by bearer management network element carries as the target side of described terminal equipment.Technique scheme can avoid the phenomenon of handoff failure, improves the reliability of business.

Description

The acquisition methods of bearing identification of target side carrying, bearer management network element and packet data gateway

Technical field

The present invention relates to technical field of network communication, be specifically related to carrying establishing techniques when terminal equipment switches between 3GPP system and non-3 GPP system.

Background of invention

At present, terminal equipment can be linked in The 3rd Generation Partnership Project (third generation Partnership Program, 3GPP) system, also can be linked in untrusted non-3 GPP system.And terminal equipment can be switched to 3GPP system from untrusted non-3 GPP system, also can from 3GPP systematic evaluation to untrusted non-3 GPP system.

Based on General Packet Radio System Tunneling protocol (General Packet Radio System GPRS Tunnel Protocol, GTP) in network application scene, the process that terminal equipment is switched to 3GPP system from untrusted non-3 GPP system generally includes: MobilityManagement Entity (mobile management network element, MME) Serving Gateway (gateway is selected, and Packet DataNetwork Gateway (packet data gateway SGW), PGW), and for terminal equipment distribute switch target side carrying bearing identification, MME sends Create Session Request (the creating session request) message including and switch instruction and this bearing identification to SGW.SGW forwards Create Session Request message to PGW, PGW is that the carrying of target side set up by terminal equipment according to the bearing identification comprised in message, and transmission includes the IP address of terminal equipment in the non-3 GPP system of untrusted or Create Session Response (establishment conversational response) message of IP address prefix, this Create Session Response message is transmitted to MME, to inform that MME successfully sets up and have updated carrying by SGW.

Based in the network application scene of GTP, terminal equipment generally includes from 3GPP systematic evaluation to the process of untrusted non-3 GPP system: the EvolvedPacketDataGateway (packet data gateway of evolution, ePDG) for terminal equipment distributes the bearing identification switching the carrying of target side, and the Create Session Request message including and switch instruction and this bearing identification is sent to PGW.PGW is that the carrying of target side set up by terminal equipment according to the bearing identification comprised in message, returns Create Session Response message, to inform that ePDG successfully sets up and have updated carrying to ePDG.

Realizing in process of the present invention, inventor finds: in above-mentioned handoff procedure, the bearing identification bearing identification that may carry with the source of this terminal equipment of the target side carrying distributed for terminal equipment clashes, as source and target side use identical bearing identification to represent different carryings etc.Source carrying to conflict with the bearing identification that target side carries and network side may be caused successfully can not to set up target side for terminal equipment carry or network side can be caused to carry there is the source of conflict of wrong deletion, thus can cause the handoff failure of terminal equipment.

Summary of the invention

The acquisition methods of the bearing identification of target side that embodiment of the present invention provides carrying, bearer management network element and packet data gateway, can avoid source to carry the problem of conflicting with the bearing identification that target side carries.

The acquisition methods of the bearing identification of a kind of target side carrying that embodiment of the present invention provides, comprising:

At terminal equipment between third generation Partnership Program 3GPP system and non-3 GPP system in handoff procedure,

Bearer management network element is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and knows in target side system and also use GTP,

Then bearer management network element obtains the bearing identification of the source carrying of described terminal equipment,

The bearing identification that the bearing identification that described source carries by bearer management network element carries as the target side of described terminal equipment.

The acquisition methods of the bearing identification of the another kind of target side carrying that embodiment of the present invention provides, comprising:

Bearing identification in the session establishment response message that bearer management network element acquisition PGW sends and indication information, wherein said carrying is denoted as the bearing identification of source carrying;

The bearing identification that the bearing identification that described source carries according to indication information by bearer management network element carries as the target side of described terminal equipment.

The acquisition methods of the bearing identification of the third target side carrying that embodiment of the present invention provides, comprising:

PGW is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and knows in target side system and also use GTP,

Described PGW obtains the bearing identification of the source carrying of described terminal equipment,

The bearing identification that the bearing identification that described source carries by described PGW carries as the target side of described terminal equipment sets up target carrying.

A kind of bearer management network element that embodiment of the present invention provides, comprising:

Acquisition module, for at terminal equipment between third generation Partnership Program 3GPP system and non-3 GPP system in handoff procedure, know that in source side system, packet data gateway PGW have employed general packet wireless service tunnel protocol GTP, and know in target side system and also use GTP;

Control module, for know in source side system when described acquisition module have employed GTP and know also use GTP in target side system time, obtain the bearing identification of the source carrying of described terminal equipment, and the bearing identification that the bearing identification carried by source carries as the target side of described terminal equipment.

The another kind of bearer management network element that embodiment of the present invention provides, comprising: at terminal equipment between third generation Partnership Program 3GPP system and non-3 GPP system in handoff procedure,

Acquisition module, for obtain described PGW send session establishment response message in bearing identification and indication information, wherein said carrying be denoted as source carrying bearing identification;

Control module, for the bearing identification that the bearing identification that carried by described source according to indication information carries as the target side of described terminal equipment.

A kind of packet data gateway that embodiment of the present invention provides, comprising:

Know module, for, knowing in source side system and used General Packet Radio System tunnel protocol GTP in handoff procedure at terminal equipment between third generation Partnership Program 3GPP system and non-3 GPP system, and know in target side system and have employed GTP;

Set up module, for described know module know in source side system have employed GTP and also use GTP in target side system time, obtain the bearing identification of the source carrying of described terminal equipment, the bearing identification that the bearing identification carried by the source of described terminal equipment carry as the target side of described terminal equipment is set up target side for this terminal equipment and is carried.

Known by the description of technique scheme, at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, bearer management network element when know in source side system have employed GTP and also use GTP in target side system, by obtaining the bearing identification of the source carrying of described terminal equipment, the bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment; Or, the bearing identification in the session establishment response message that bearer management network element acquisition PGW sends and indication information, wherein said carrying is denoted as the bearing identification of source carrying; The bearing identification that the bearing identification that described source carries according to indication information by bearer management network element carries as the target side of described terminal equipment, thus the bearing identification that the bearing identification that the target side of this terminal equipment is carried can not carry with source clashes; Thus the embodiment of the present invention can avoid the phenomenon of handoff failure, finally improve the reliability of business.

Brief Description Of Drawings

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the carrying establishing method flow chart of the embodiment of the present invention one;

Fig. 2 is the carrying establishing method flow chart of the embodiment of the present invention two;

Fig. 3 A is the carrying Establishing process figure of the UE access non-3 GPP system of the embodiment of the present invention three and four;

Fig. 3 B is the UE of the embodiment of the present invention three is switched to 3GPP system carrying Establishing process figure from non-3 GPP system;

Fig. 4 is the UE of the embodiment of the present invention four is switched to 3GPP system carrying Establishing process figure from non-3 GPP system;

Fig. 5 A is the carrying Establishing process figure of the UE access 3GPP system of the embodiment of the present invention five;

Fig. 5 B is that the UE of the embodiment of the present invention five and embodiment six is from 3GPP systematic evaluation to the carrying Establishing process figure non-3 GPP system;

Fig. 6 is the carrying Establishing process figure of the UE access 3GPP system of the embodiment of the present invention six;

Fig. 7 A is the carrying Establishing process figure of the UE access non-3 GPP system of the embodiment of the present invention seven and eight;

Fig. 7 B is the UE of the embodiment of the present invention seven is switched to 3GPP system carrying Establishing process figure from non-3 GPP system;

Fig. 8 is the UE of the embodiment of the present invention eight is switched to 3GPP system carrying Establishing process figure from non-3 GPP system;

Fig. 9 A is the carrying Establishing process figure of the UE access 3GPP system of the embodiment of the present invention nine;

Fig. 9 B is that the UE of the embodiment of the present invention nine and embodiment ten is from 3GPP systematic evaluation to the carrying Establishing process figure non-3 GPP system;

Figure 10 A is the bearer management network element schematic diagram of the embodiment of the present invention ten;

Figure 10 B-10D is the control module schematic diagram of the embodiment of the present invention ten;

Figure 11 is the packet data gateway schematic diagram of the embodiment of the present invention 11;

Figure 12 is that system schematic is set up in the carrying of the embodiment of the present invention 12;

Figure 13 is another bearer management network element embodiment schematic diagram of the present invention.

Implement mode of the present invention

Below by embodiment, explanation is exemplified to specific implementation process of the present invention.Obviously, the embodiments described below are the present invention's part embodiments, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

The acquisition methods of the bearing identification of embodiment one, the carrying of target side.The flow process of the method as shown in Figure 1.

In Fig. 1, S100, at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, the bearer management network element switched is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, be specifically as follows bearer management network element and obtain the information that have employed GTP in source side system, this information can indicate in source side system, GTP tunnel is established between PGW and SGW or between PGW and ePDG, such as, can indicate and have employed GTP as in the S2b reference point between the bearer management network element (as ePDG) of the non-3 GPP system of source side system and PGW, again such as, S5 or the S8 reference point between can indicating as SGW and the PGW in the 3GPP system of source side system have employed GTP.

Above-mentioned terminal equipment switches between 3GPP system and non-3 GPP system: terminal equipment is switched to 3GPP system from non-3 GPP system, also can be: terminal equipment is from 3GPP systematic evaluation to non-3 GPP system.Above-mentioned non-3 GPP system can be the non-3 GPP system of untrusted.The present embodiment is the concrete reason that switches between 3GPP system and non-3 GPP system of limiting terminal equipment not.

Be switched in 3GPP systematic procedure at terminal equipment by non-3 GPP system, bearer management network element in the present embodiment can be MME (mobile management network element), also can be Serving GPRS Supporting Node (Serving GPRS Support Node, SGSN).At terminal equipment by 3GPP systematic evaluation in non-3 GPP system process, the bearer management network element in the present embodiment can also be IAD ePDG, because ePDG has the function of bearer management network element at this moment concurrently.

Bearer management network element obtains the mode that have employed the information of GTP in source side system to be had multiple, simply enumerates several obtain manner below:

Example 1, be switched in 3GPP systematic procedure at terminal equipment by non-3 GPP system, bearer management network element (as MME or SGSN) can obtain the information that have employed GTP in source side system from HSS.That is, if having employed GTP in source side system, then the information that have employed GTP should be stored in source side system in HSS.

The object lesson storing in source side system the process of the information that have employed GTP in HSS is: be linked in non-3 GPP system process at this terminal equipment, if terminal equipment network when accessing adopts GTP, then aaa server can send to HSS and include the information that current network (i.e. current non-3 GPP system) have employed GTP, such as, in Authentication Authorization process, aaa server sends to HSS and includes the information that current network have employed GTP; Again such as, upgrade in the process of the PGW address in aaa server and HSS at PGW, aaa server sends to HSS and includes the message that current network have employed the information of GTP.HSS obtains the information that current network have employed GTP from the message that aaa server sends, and stores.The information of this storage in follow-up handoff procedure as source side system in have employed the information of GTP.

Example 2, be switched in 3GPP systematic procedure at terminal equipment by non-3 GPP system, bearer management network element (as MME or SGSN) can obtain the information that have employed GTP in source side system from this terminal equipment.That is, if having employed GTP in source side system, then the information that have employed GTP in source side system should be stored in this terminal equipment.

The object lesson storing in source side system the process of the information that have employed GTP in terminal equipment is: be linked in non-3 GPP system process at terminal equipment, if PGW adopts GTP, then aaa server can send to ePDG and include the message that current network (i.e. current non-3 GPP system) have employed the information of GTP, this information is transmitted to terminal equipment by ePDG, terminal equipment obtains the information that current network have employed GTP from the message that ePDG sends, and stores.

Example 3, at terminal equipment by 3GPP systematic evaluation in non-3 GPP system process, bearer management network element (as ePDG) can obtain in source side system the information that have employed GTP from aaa server.That is, if having employed GTP in source side system, then aaa server should be able to get the information that have employed GTP in source side system, and this information got should be sent to bearer management network element by aaa server.

Aaa server obtains the object lesson that have employed the process of the information of GTP in source side system: if having employed GTP in source side system, then should store the information that have employed GTP in source side system in HSS, aaa server obtains the information that have employed GTP in source side system from HSS.

The object lesson storing in source side system the process of the information that have employed GTP in HSS is: be linked in 3GPP systematic procedure at this terminal equipment, if MME or SGSN determines current network, (i.e. current 3GPP system) have employed GTP, then MME or SGSN can send to HSS and include the message that current network have employed the information of GTP, HSS obtains the information that current network have employed GTP from the message that MME or SGSN sends, and stores.

Example 4, at terminal equipment by 3GPP systematic evaluation in non-3 GPP system process, bearer management network element (as ePDG) can obtain in source side system the information that have employed GTP from terminal equipment.That is, the information that have employed GTP in source side system should be stored in terminal equipment.

The information that have employed GTP in the source side system that terminal equipment stores comprises: be linked in 3GPP systematic procedure at terminal equipment, and terminal equipment obtains from the message that bearer management network element (as MME or SGSN etc.) sends and the current network stored have employed the information of GTP.

S110, have employed GTP and after knowing and still have employed GTP in target side system knowing in source side system, bearer management network element obtains the bearing identification of the source carrying of this terminal equipment, the bearing identification that the bearing identification carried by the source of this terminal equipment carries as the target side of this terminal equipment.The bearing identification that the bearing identification that the source of terminal equipment carries by bearer management network element carries as the target side of this terminal equipment is namely: in the context of the target side carrying that bearer management network element is preserved, this thresholding of bearing identification that target side carries is set to the bearing identification of source carrying wherein.

Optionally, if do not know in source side system the information that have employed GTP or know in target side system and do not adopt GTP, then bearer management network element controls the carrying of target side according to existing control mode, a concrete control example: bearer management network element is that the carrying of target side distributes bearing identification, when the bearing identification of the bearing identification that the target side comprised in the message that PGW returns carries and this distribution is inconsistent, the bearing identification of the target side carrying that refusal PGW returns.The above-mentioned target side carrying for terminal equipment foundation can be: be the target side default bearer that terminal equipment is set up, also can be: be the target side dedicated bearing that terminal equipment is set up.

Have employed between GTP and PGW and SGW or between PGW and ePDG in above-mentioned target side system and establish GTP tunnel; Such as, have employed GTP as in the S2b reference point between the bearer management network element (as ePDG) of the non-3 GPP system of target side system and PGW; Again such as, have employed GTP as in S5 or the S8 reference point between SGW and the PGW in the 3GPP system of target side system.

In the present embodiment, bearer management network element obtains the bearing identification of the source carrying of terminal equipment, and the bearing identification that the bearing identification carried by source carries as the target side of described terminal equipment, that is: in handoff procedure, after bearer management network element obtains the bearing identification of source carrying of terminal equipment, then bearer management network element accepts the bearing identification that the bearing identification of this source carrying is the carrying of target side.Exemplify following several specific implementation below:

Mode 1, bearer management network element from HSS or the bearing identification obtaining source carrying from aaa server, the bearing identification that carries as target side of bearing identification that source is carried.

Wherein, which can further include following steps: be included in by the bearing identification that source carries and send to (as session establishment request message) in the message of PGW, PGW obtains the bearing identification of described source carrying, and the bearing identification that the bearing identification carried by source carry as the target side of described terminal equipment is set up target and carried.

In mode 1, bearer management network element can from HSS or the bearing identification obtaining source carrying from aaa server in handoff procedure.The bearing identification of the source carrying stored in aaa server can be the bearing identification of the source carrying that aaa server obtains from HSS.

The bearing identification of the source carrying that HSS stores can be: be linked in non-3 GPP system process at terminal equipment or be linked in 3GPP systematic procedure at terminal equipment, the bearing identification of the source carrying that HSS gets from the message that MME or SGSN or aaa server send.

Mode 2, bearer management network element are the bearing identification of the target side carrying of terminal equipment distributing terminals equipment, and send the message (as session establishment request message) of the bearing identification of the target side carrying including distribution to PGW.The bearing identification that source carries is included in (as session establishment response message) in the message returned by PGW, bearer management network element is after receiving the message (as session establishment response message) that PGW returns, and the bearing identification accepting the source carrying comprised in the message that PGW returns is the bearing identification of target side carrying.

Because now bearer management network element has been known in source side system and have employed General Packet Radio System tunnel protocol GTP, and know in target side system and also use GTP, whether the bearing identification of the target side carrying comprised in the message no matter returned at PGW is consistent with the bearing identification of this distribution, and bearer management network element all receives the target side bearing identification comprised in the message that PGW returns.

Further,: PGW can also be comprised the following steps before bearing identification in the session establishment response message that PGW returns in the manner know in source side system and have employed General Packet Radio System tunnel protocol GTP, and know in target side system and also use GTP; Then the bearing identification in the session establishment response message that returns of PGW is the bearing identification of source carrying.

Meanwhile, the manner can further include following steps: PGW obtains the bearing identification of source carrying, and the bearing identification that the bearing identification carried by described source carry as the target side of described terminal equipment is set up target and carried.Tandem relation is not had between the session establishment response message that this step and PGW return.

Mode 3, bearer management network element send the message (as session establishment request message) including the bearing identification retaining numerical value to PGW, source bearing identification is included in (as session establishment response message) in the message returned by PGW, bearer management network element is after receiving the message (as session establishment response message) that PGW returns, and the bearing identification accepting to comprise in the message that PGW returns is the bearing identification of target side carrying.

Mode 4, bearer management network element are not the bearing identification of the target side carrying of terminal equipment distributing terminals equipment, bearer management network element sends the message (as session establishment request message) not comprising bearing identification to PGW, bearer management network element is after receiving the message (as session establishment response message) that PGW returns, and the bearing identification accepting to comprise in the message that PGW returns is the bearing identification of target side carrying.

In aforesaid way, the bearing identification that PGW obtains the source carrying of described terminal equipment is specially: if include the bearing identification that source carries in the message that sends to PGW of bearer management network element, then the bearing identification that the bearing identification that the source comprised in message carries carry as the target side of this terminal equipment directly can be set up target side for this terminal equipment and carries by PGW, as being that target side carries Resources allocation etc.If do not comprise the bearing identification of source carrying in the message that bearer management network element sends to PGW, due to PGW sets up in source side system for described terminal equipment carry time, store the bearing identification that source carries.In handoff procedure, PGW can from the bearing identification self storing the source carrying obtaining described terminal equipment.

From the description of above-described embodiment one, at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, bearer management network element when know in source side system have employed GTP and also use GTP in target side system, by obtaining the bearing identification of the source carrying of this terminal equipment, and the bearing identification that the bearing identification carried by source carries as the target side of this terminal equipment, the bearing identification that the bearing identification that the target side of this terminal equipment is carried can not carry with source clashes; Thus avoid the phenomenon of handoff failure, finally improve the reliability of business.

Wherein, the bearing identification that the bearing identification that in embodiment, source carries by PGW carries as the target side of described terminal equipment is set up target carrying and specifically can be comprised: be the carrying Resources allocation of target side.

The acquisition methods of the bearing identification of another kind of target side carrying of the present invention, be included in terminal equipment between third generation Partnership Program 3GPP system and non-3 GPP system in handoff procedure, bearing identification in the session establishment response message that bearer management network element acquisition PGW sends and indication information, wherein said carrying is denoted as the bearing identification of source carrying; The bearing identification that the bearing identification that described source carries according to indication information by bearer management network element carries as the target side of described terminal equipment.

Wherein, bearer management network element comprises before obtaining bearing identification in the session establishment response message that described PGW sends and indication information: described bearer management network element sends session establishment request message and sends to described PGW, and described session establishment request message carries the bearing identification that bearer management network element distributes

Wherein, also comprise: PGW before the bearing identification in the session establishment response message that PGW sends and know in source side system and have employed General Packet Radio System tunnel protocol GTP, and know in target side system and also use GTP.

Wherein, described method also comprises: described PGW obtains the bearing identification of source carrying, and the bearing identification that the bearing identification carried by described source carry as the target side of described terminal equipment is set up target and carried.

The acquisition methods of the bearing identification of embodiment two, the carrying of a kind of target side.The flow process of the method as shown in Figure 2.

In fig. 2, S200, at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, PGW is known in source side system and be have employed GTP, and knows in target side system and also use GTP (namely still have employed GTP after this terminal equipment switches).

Wherein, PGW is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and know that also using GTP in target side system is specially: the bearer context etc. that PGW can store according to this locality judges to have employed in source side system GTP, according to type of message received in target side system, PGW can know that target side system have employed GTP.

S210, PGW obtain the bearing identification of the source carrying of described terminal equipment, and the bearing identification that bearing identification carry by the source of this terminal equipment carries as the target side of this terminal equipment is set up target side for this terminal equipment and carried (as target side default bearer and/or target side dedicated bearing).

The bearing identification that PGW obtains the source carrying of described terminal equipment is specially: if pre-set in the message that bearer management network element sends to PGW the bearing identification including source and carry, then the bearing identification that the bearing identification that the source comprised in message carries carry as the target side of this terminal equipment directly can be set up target side for this terminal equipment and carries by PGW, as being that target side carries Resources allocation etc.If pre-set the bearing identification not comprising source carrying in the message that bearer management network element sends to PGW, due to PGW sets up in source side system for described terminal equipment carry time, store the bearing identification that source carries.In handoff procedure, PGW can from the bearing identification self storing the source carrying obtaining described terminal equipment.

Described method also comprises:

One: PGW sends the message (as session establishment response message) of bearing identification of the bearing identification including source carrying to bearer management network element, the bearing identification that the bearing identification that described source carries by bearer management network element carries as the target side of described terminal equipment.Or

Two: if PGW receives the message (as session establishment request message) of the bearing identification of the target side carrying that bearer management network element sends, wherein include the carrying mark that bearer management network element is the target side carrying of terminal equipment distributing terminals equipment.PGW is also to the message (as session establishment response message) that bearer management network element sends, comprising the bearing identification of source carrying, and comprise an indication information, bearer management network element after receiving the message (as session establishment response message) that PGW returns, the bearing identification that the bearing identification carried by source according to indication information carries as the target side of this terminal equipment.

From the description of above-described embodiment two, at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, PGW have employed GTP and after also use GTP in target side system knowing in source side system, the bearing identification carried as the target side of this terminal equipment by the bearing identification that carried by the source of this terminal equipment sets up the carrying of target side for this terminal equipment, and the bearing identification that the bearing identification that the target side of this terminal equipment is carried can not carry with source clashes; Thus avoid the phenomenon of handoff failure, improve the reliability of business.

Embodiment three, under the application scenarios that S2b reference point uses GTP, target side system to also use GTP and bearer management network element is MME, UE is switched to the carrying establishing method 3GPP systematic procedure from non-3 GPP system.The flow process of the method as shown in figs. 3 a and 3b.

Fig. 3 A is the loading establishing process that UE accesses in non-3 GPP system, and Fig. 3 B is that UE is switched to the loading establishing process 3GPP system from non-3 GPP system.

In figure 3 a, S1, at authentication and tunnel establishment stage, network side determines to use GTP, network side instruction UE: network side employs GTP.S1 specifically can comprise following S1a to S1e.Optionally, S1 can also comprise following S1f.

S1a, UE send IKE_AUTH_Request (IKE authentication request) message to ePDG.

Authentication & AuthorizationRequest (authentication and authorization requests) message is sent to aaa server after S1b, ePDG receive IKE_AUTH_Request message.

S1c, aaa server obtain Userprofile (user profile collection) from HSS/HLR after receiving Authentication & Authorization Request message.

After S1d, aaa server determine that S2b reference point (i.e. S2b interface) uses GTP, send to ePDG and include Authentication & Authorization Answer (authentication and the authorization response) message that S2b reference point uses GTP indication information.

S1e, ePDG send IKE_AUTH_Response (IKE Authentication Response) message to UE.Include S2b reference point in this message and use GTP indication information.

If S1f S1e does not perform, then aaa server sends notice of settlement to HSS, and know that to make HSS the current network (source side system namely in handoff procedure) of UE employs GTP, that is, HSS is known, and S2b reference point employs GTP.HSS stores the information that the current network of UE employs GTP, have employed the information of GTP in the source side system in this information that HSS stores and embodiment one.

S2, ePDG are that UE distributes bearing identification, and include to PGW transmission the Create Session Request message this bearing identification and S2b reference point using GTP indication information, under chained (chain type) framework, this message is transmitted to PGW by SGW.Above-mentioned S2b reference point use GTP indication information for notifying PGW:S2b reference point employs GTP.

It should be noted that, in S2, can not carry in S2b reference point in the Create Session Request message that the Create Session Request message that ePDG sends to SGW and SGW send to PGW and use GTP indication information, in this case, PGW can adopt alternate manner to judge whether S2b reference point employs GTP, such as, according to the access network type information received and type of message, PGW judges whether S2b reference point employs GTP.In addition, can not carry in S2b reference point in the Create Session Request message that ePDG sends to SGW and use GTP indication information, and judge whether S2b reference point employs GTP by SGW, after judging that S2b reference point employs GTP, carry in S2b reference point in the Create Session Request message that SGW sends to PGW and use GTP indication information.

S3, PGW are after receiving Create Session Request message, by the information registering of oneself in HSS, as PGW initiates UpdatePDN GW Address (upgrading PDN GW address) process, this process can make aaa server and HSS upgrade the PGW information of its storage.

If do not comprise S1f in above-mentioned S1, then in S3, the information transmission that have employed GTP in the current network of UE can be stored this information to HSS, HSS by PGW.

S4, PGW send Create Session Response message, and under chained structure, Create Session Response message transfers to ePDG via SGW.

In figure 3b, S1, UE send AttachRequest (attachment request) message including PDN Connectivity Request (PDN connection request) message to MME, in Attach Request message, Request Type (request type) is set to " Handover (switching) ".Here Handover is used to indicate UE to be needed to switch between non-3 GPP system and 3GPP system.

It should be noted that, if do not comprise S1f in the S1 in Fig. 3 A, and, in the S3 of Fig. 3 A, PGW will not have employed the information transmission of GTP to HSS in current network, then in the S1 of Fig. 3 B, UE sends to MME by S2b reference point using GTP indication information be carried in Attach Request message.

S2, MME, after receiving Attach Request message, send Update Location Request (position updating request) message, to obtain the subscription data of UE to HSS.HSS returns Update Location Ack (location updating confirmation) message of the subscription data including UE to MME.If store PGW in the source side system of UE in HSS to use the information of GTP, then can include the information that have employed GTP in the source side system of UE in Update Location Ack message.

S3, MME send the Create Session Request message including Handover instruction after receiving Update Location Ack message, and this message transfers to PGW via SGW.Handover instruction in Create Session Request message is used to indicate UE equally to be needed to switch between non-3 GPP system and 3GPP system.

It should be noted that for the S3 in Fig. 3 B, if MME receives S2b interface in the source side system of UE (i.e. S2b reference point) and employs the information of GTP and determine that the target side network S5b of UE or S8b interface (i.e. S5b or S8b reference point) adopt GTP, then MME can not be the target side carrying distribution bearing identification of UE, namely bearing identification can not be comprised in the Create Session Request message that MME sends, or the bearing identification comprised is Null, or the bearing identification comprised is predetermined value (namely retaining the bearing identification of numerical value).In addition, MME also can be that the target side carrying of this UE distributes bearing identification distribution bearing identification, namely the bearing identification that MME distributes can be comprised in the CreateSession Request message that MME sends, but, in the S5 of Fig. 3 B, MME should accept the bearing identification that bearing identification that PGW returns carries as target side.

S4, PGW initiate IP-CAN Session Modification (IP-CAN session modification) process, thus can obtain Policy Control and Charging (policy control and charging, PCC) rule from PCRF.A concrete example: PGW is to Policy ChargingRule Function (policy charging rule function, PCRF) send Indication of IP-CAN Session modification (instruction of IP-CAN session modification) message, PCRF returns Acknowledge IP-CAN Session modification (confirmation of the IP-CAN session modification) message including PCC rule to PGW.

S5, PGW are that UE sets up target side carrying (i.e. target side default bearer), as the target side carrying Resources allocation that PGW is UE, PGW sends the Create Session Response message of the bearing identification including the carrying of target side, and this message transfers to MME via SGW.

It should be noted that for the S5 in Fig. 3 B, in the source side system of UE, have employed GTP and UE switches between non-3 GPP system and 3GPP system, the bearing identification of the target side carrying comprised in the Create Session Response message that PGW sends in fact also is the bearing identification of source carrying, i.e. the bearing identification that carries as the target side of UE of the bearing identification that carried by the source of UE of PGW.In addition, can must include the bearing identification of source carrying in network in the Create Session Request message that sends to PGW of regulation MME, in network, also necessarily can not include the bearing identification that source carries in the Create Session Request message that sends to PGW of regulation MME.If the bearing identification of source carrying must be included in the Create Session Request message that in network, regulation MME sends to PGW, or regulation PGW cannot change the bearing identification that MME distributes, always accept the bearing identification that MME distributes, then the operation of PGW execution is as the description of following embodiment seven.If the bearing identification of source carrying must be included in the CreateSession Request message that in network, regulation MME does not send to PGW, then in the S5 of the present embodiment PGW according to comprise in CreateSession Request message Handover instruction know that UE switches between non-3 GPP system and 3GPP system time, the configuration information etc. of the carrying correspondence that can store according to this locality judges in the source side system of UE, whether PGW employs GTP, and then the bearing identification of source carrying can be found when judging to employ GTP, like this, PGW can judge that UE switches between non-3 GPP system and 3GPP system, and when have employed GTP in the source side system of UE, according to find source carrying bearing identification be UE set up target side carrying.

It should be noted that for the S3 in Fig. 3 B, if MME is not known in source side system use GTP information, namely in S1, UE does not have this information reporting to MME, in S2, this information is not also handed down to MME by HSS, in S3, MME is that the target side carrying of this UE distributes bearing identification distribution bearing identification, namely the bearing identification that MME distributes can be comprised in the Create Session Request message that MME sends, but, in the S5 of Fig. 3 B, PGW is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and after knowing and also using GTP in target side system, obtain the bearing identification of the source carrying of this terminal equipment, and the bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment, be included in Create Session Response message and return, and in Create Session Response message, send an indication information, after MME receives this Create Session Response message, according to the bearing identification that the bearing identification in this message carries as the target side of this terminal equipment by indication information wherein.

In the present embodiment, if PGW needs the Establishing process of target side dedicated bearing of initiating UE, then the PGW bearing identification that needs equally to use non-3 GPP system to distribute sets up target side dedicated bearing for UE.

From the description of above-described embodiment three, be switched in 3GPP systematic procedure at UE by non-3 GPP system, MME can have employed the information of GTP by obtaining source side system, know in the source side system of UE and have employed GTP, MME when know in source side system have employed GTP and target side system also uses GTP, by knowing that bearing identification that source carries sets up the carrying of target side for this UE; MME also can not obtain the information that source side system adopts GTP, and when PGW is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and after knowing and also using GTP in target side system, the bearing identification that PGW obtains the source carrying of described terminal equipment carries for this UE sets up target side, and the bearing identification that the bearing identification that the target side of this UE is carried can not carry with source clashes; Thus avoid by the handoff failure phenomenon of non-3 GPP system to 3GPP system, improve the reliability of business.

Embodiment four, under the source side system of UE and target side system all have employed GTP and bearer management network element is the application scenarios of SGSN, UE is switched to the carrying establishing method 3GPP systematic procedure from non-3 GPP system.The flow process of the method is as shown in accompanying drawing 3A and accompanying drawing 4.

Fig. 3 A is the loading establishing process that UE accesses in non-3 GPP system, and Fig. 4 is that UE is switched to the loading establishing process 3GPP system from non-3 GPP system.Fig. 3 A, as the description of above-described embodiment three, is not repeated.

In the diagram, S1, UE send Attach Request message to SGSN, and the Request Type in Attach Request message is set to " Handover ".Here Handover is used to indicate UE to be needed to switch between non-3 GPP system and 3GPP system.If there is S2b reference point to use the information of GTP in UE, UE can send to MME by S2b reference point using GTP indication information be carried in Attach Request message.

S2, SGSN, after receiving Attach Request message, send Update Location Request message, to obtain the subscription data of UE to HSS.HSS returns the Update Location Ack message of the subscription data including UE to SGSN.If store S2b interface in the source side system of UE in HSS to use the information of GTP agreement, then can include S2b interface (PGW) in the source side system of UE in Update Location Ack message and have employed the information of GTP.

S3, SGSN return Attach Accept (attachment accepts) message to UE after receiving Update Location Ack message.If SGSN has known the information that have employed GTP in the source side system of UE, then the information that have employed GTP in the source side system of UE can be included in Attach Accept message and send to UE by SGSN.

S4, UE send Activate PDP Context Request (activating PDP Context request) message to SGSN, and in Activate PDPContext Request message, Request Type is set to " Handover ".Here Handover is used to indicate UE to be needed to switch between non-3 GPP system and 3GPP system.

It should be noted that for the S4 in Fig. 4, UE can distribute NSAPI, namely the NSAPI of distribution is included in the Activate PDP ContextRequest message that UE sends to SGSN, but, receive the Create Session Response message in the S7 of Fig. 4 at SGSN after, the NSAPI that SGSN should accept to comprise in the message that PGW returns carrys out the NSAPI that alternative UE distributes.Namely, in the subsequent process activating PDP Context, the bearing identification that target side can carry by SGSN is carried at as NSAPI and activates in PDP Context response message, and send this response message to UE, no matter whether the NSAPI that the NSAPI in this response message distributes is identical, UE all should accept the NSAPI in this response message.

Also it should be noted that for the S4 in Fig. 4, if do not comprise S1f in the S1 in Fig. 3 A, and, in the S3 of Fig. 3 A, PGW will not have employed the information transmission of GTP to HSS in the current network of UE, then in the S4 of Fig. 4, UE can send to SGSN by S2b reference point using GTP indication information be carried in Activate PDP Context Request message.In addition, in S3, if do not comprise the information that have employed GTP in the current network of UE in the Attach Accept message that UE receives, then in the S1 of Fig. 4, UE can send to SGSN by S2b reference point using GTP indication information be carried in Activate PDP Context Request message.

S5, SGSN send the Create Session Request message including Handover instruction, and this message transfers to PGW via SGW.It is current for switch between non-3 GPP system and 3GPP system that Handover instruction in Create Session Request message is used to indicate UE equally.

S6, PGW initiate IP-CAN Session Modification process, thus can obtain the PCC rule of amendment from PCRF.A concrete example: PGW sends Indication of IP-CAN Session modification message to PCRF, and PCRF returns the Acknowledge IP-CAN Session modification message including PCC rule to PGW.

S7, PGW are that UE sets up target side carrying (i.e. target side default bearer), as the NSAPI Resources allocation that PGW is UE, PGW sends the Create Session Response message of the bearing identification (i.e. NSAPI) including the carrying of target side, and this message transfers to SGSN via SGW.

It should be noted that for the S7 in Fig. 4, in the source side system of UE, have employed GTP and UE switches between non-3 GPP system and 3GPP system, the bearing identification of the target side carrying comprised in the Create Session Response message that PGW sends in fact also is the bearing identification of source carrying, i.e. the bearing identification that carries as the target side of UE of the bearing identification that carried by the source of UE of PGW.In addition, the bearing identification of source carrying can must be included in the Create Session Request message that sends to PGW of regulation SGSN in network, or regulation PGW cannot change the bearing identification that SGSN sends, always accept the bearing identification that SGSN sends, in network, also necessarily can not include the bearing identification of source carrying in the Create Session Request message that sends to PGW of regulation SGSN.If must include the bearing identification of source carrying in the Create Session Request message that in network, regulation SGSN sends to PGW, then the operation that performs of PGW is as the description of following embodiment seven.If the bearing identification of source carrying must be included in the CreateSession Request message that in network, regulation SGSN does not send to PGW, then in the S7 of the present embodiment PGW according to comprise in CreateSession Request message Handover instruction know that UE switches between non-3 GPP system and 3GPP system time, the configuration information etc. of the carrying correspondence that can store according to this locality judges whether the source carrying of UE employs GTP, and then the bearing identification of source carrying can be found when judging to employ GTP, like this, PGW can judge that UE switches between non-3 GPP system and 3GPP system, the S2b reference point of the source side system of UE employs GTP, and S5b or the S8b reference point of the target side system of UE is when employing GTP, according to find source carrying bearing identification be UE set up target side carrying.

Also it should be noted that for the S4 in Fig. 4, if SGSN is not known in source side system use GTP information, namely in S1, UE does not have this information reporting to SGSN, in S2, this information is not also handed down to SGSN by HSS, in S4, include the NSAPI of distribution in the ActivatePDP Context Request message that UE sends to SGSN, namely SGSN is using this NSAPI as bearing identification, is included in the Create Session Request message of transmission.Then in the S7 of Fig. 4, PGW have employed General Packet Radio System tunnel protocol GTP knowing in source side system, and after knowing and also using GTP in target side system, obtain the bearing identification of the source carrying of this terminal equipment, and the bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment, be included in Create SessionResponse message and return, and in Create Session Response message, send an indication information, after SGSN receives this CreateSession Response message, according to the bearing identification that the bearing identification in this message carries as the target side of this terminal equipment by indication information wherein, and this mark is returned to UE as NSAPI.

From the description of above-described embodiment four, be switched in 3GPP systematic procedure at UE by non-3 GPP system, SGSN can obtain the information whether UE have employed GTP in source side system.SGSN when know in source side system have employed GTP and target side system also uses GTP, by knowing that bearing identification that source carries sets up the carrying of target side for this UE; SGSN also can not obtain the information that source side system adopts GTP, and when PGW is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and after knowing and also using GTP in target side system, the bearing identification that PGW obtains the source carrying of described terminal equipment carries for this UE sets up target side, and the bearing identification that the bearing identification that the target side of this UE is carried can not carry with source clashes; Thus avoid by the handoff failure phenomenon of non-3 GPP system to 3GPP system, improve the reliability of business.

Embodiment five, in the source side system and target side system of UE, all have employed GTP and under bearer management network element is the application scenarios of ePDG, UE is from 3GPP systematic evaluation to the carrying establishing method non-3 GPP system process.The flow process of the method is as shown in accompanying drawing 5A and accompanying drawing 5B.

Fig. 5 A is the loading establishing process that UE accesses in 3GPP system, and Fig. 5 B is that UE is from 3GPP systematic evaluation to the loading establishing process non-3 GPP system.

In fig. 5, S1, UE send the Attach Request message including PDN Connectivity Request message to MME, and in AttachRequest message, Request Type is set to " Initial Attach (initially adhering to) ".Here Initial Attach is used to indicate UE and initially accesses 3GPP system.

S2, MME, after receiving Attach Request message, send Update Location Request message, to obtain the subscription data of UE to HSS.HSS returns the Update Location Ack message of the subscription data including UE to MME.

S3, MME send and include the Create Session Request message that MME is the default bearer mark that this UE distributes after receiving Update Location Ack message, and this message transfers to PGW via SGW.

S4, PGW initiate IP-CAN Session Modification process, thus can obtain PCC rule from PCRF.A concrete example: PGW sends Indication of IP-CAN Session modification message to PCRF, and PCRF returns the Acknowledge IP-CAN Session modification message including PCC rule to PGW.

S5, PGW are that UE sets up default bearer, and if PGW is the default bearer Resources allocation of UE, PGW sends the Create Session Response message including the bearing identification of default bearer, and this message transfers to MME via SGW.Optionally, if PGW needs the Establishing process of the dedicated bearing of initiating UE, then MME also needs for the dedicated bearing of this UE distributes bearing identification.

S6, MME send Attach Accept message to UE, successfully connect for this UE sets up PDN.S5 or S8 reference point can be included in the AttachAccept message that MME sends to UE and use GTP indication information.

If S7 UE supports that 3GPP system is to the switching of non-3 GPP system, and MME have selected the PGW different from the PGW in subscription data, then MME sends Notify Request (notice request) message to HSS, to be registered in HSS by the PGW id information that MME selects.If MME does not send to UE the indication information that S5 or S8 reference point uses GTP in S6 step, then the NotifyRequest message that MME is sending comprises the information that S5 or S8 reference point employs GTP.In addition, when UE supports 3GPP system to the switching of non-3 GPP system, even if MME have selected the PGW in subscription data, MME is in order to notify that HSS:S5 or S8 reference point employs the information of GTP, and MME also can send Notify Request message to HSS.The information comprised in the Notify Request message that HSS storage receives, and return Notify Response (push-notification-answer) message to MME.The information that HSS stores can comprise the information that PGW ID and/or S5 or S8 reference point employ GTP.

In figure 5b, S1, UE have accessed 3GPP system, and for this UE establishes GTP tunnel between SGW and PGW.

S2, UE detect the signal of non-3 GPP system (as untrusted non-3 GPP system), and determine to be switched in non-3 GPP system.

S3, execution IKEv2 authentication and IKEv2 tunnel establishment procedure.If UE supports that the IP address in handoff procedure retains, then it can be sent to ePDG in the IP address of source by UE.If UE receives S5 or S8 reference point at source and uses GTP indication information, then this indication information can be included in IKEv2 message and send to ePDG by UE in S3.In authentication between ePDG and aaa server and licensing process, the PGW ID obtained from HSS can be sent to ePDG by aaa server.If aaa server obtains from HSS the indication information that S5 or S8 reference point uses GTP, then this indication information is sent to ePDG by aaa server.

S4, ePDG send the Create Session Request message including Handover instruction to PGW.If ePDG receives S5 or S8 reference point and uses GTP indication information, and ePDG judges that the target side system of UE uses GTP, then ePDG can not be the target side carrying distribution bearing identification of UE, namely bearing identification can not be comprised in the Create Session Request message that ePDG sends, or the bearing identification comprised is Null, or the bearing identification comprised is predetermined value (namely retaining numerical value).In addition, ePDG also can be that the target side carrying of this UE distributes bearing identification distribution bearing identification, namely the bearing identification that ePDG distributes can be comprised in the Create Session Request message that ePDG sends, but, in the S6 of Fig. 5 B, ePDG should accept the bearing identification that bearing identification that PGW returns carries as target side.

If system supports PCC, then the present embodiment can comprise S5.S5, PGW initiate PCEF-Initiated IP CAN SessionModification (PCEF initial IP CAN session modification) process, thus obtain the strategy needing to perform.

S6, PGW are that UE sets up target side carrying (i.e. target side default bearer), and if PGW is the target side carrying Resources allocation of UE, PGW sends the Create Session Response message of the bearing identification including the carrying of target side to ePDG.

It should be noted that for the S6 in Fig. 5 B, in the source side system of UE, have employed GTP and UE switches between non-3 GPP system and 3GPP system, the bearing identification of the target side carrying comprised in the Create Session Response message that PGW sends in fact also is the bearing identification of source carrying, i.e. the bearing identification that carries as the target side of UE of the bearing identification that carried by the source of UE of PGW.In addition, can must include the bearing identification of source carrying in network in the Create Session Request message that sends to PGW of regulation ePDG, in network, also necessarily can not include the bearing identification that source carries in the Create Session Request message that sends to PGW of regulation ePDG.If must include the bearing identification of source carrying in the Create Session Request message that in network, regulation ePDG sends to PGW, then the operation that performs of PGW is as the description of following embodiment seven.If the bearing identification of source carrying must be included in the Create Session Request message that in network, regulation ePDG does not send to PGW, then in the S6 of the present embodiment PGW according to comprise in Create Session Request message Handover instruction know that UE switches between non-3 GPP system and 3GPP system time, the configuration information etc. of the carrying correspondence that can store according to this locality judges in the source side system of UE, whether PGW employs GTP, and then the bearing identification of source carrying can be found when judging to employ GTP, like this, PGW can judge that UE switches between non-3 GPP system and 3GPP system, GTP is have employed in the source side system of UE, when also using GTP in the target side system of UE, according to find source carrying bearing identification be UE set up target side carrying.

It should be noted that for the S3 in Fig. 5 B, if ePDG is not known in source side system use GTP information, namely in S3, UE does not have this information reporting to ePDG, this information is not also handed down to ePDG by HSS/AAA, in S4, ePDG is that the target side carrying of this UE distributes bearing identification distribution bearing identification, namely the bearing identification that ePDG distributes can be comprised in the Create Session Request message that ePDG sends, but, in the S6 of Fig. 5 B, PGW is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and after knowing and also using GTP in target side system, obtain the bearing identification of the source carrying of this terminal equipment, and the bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment, be included in Create Session Response message and return, and in Create Session Response message, send an indication information, after ePDG receives this Create Session Response message, according to the bearing identification that the bearing identification in this message carries as the target side of this terminal equipment by indication information wherein.

In the present embodiment, if PGW needs the Establishing process of target side dedicated bearing of initiating UE, then PGW needs to use the bearing identification of 3GPP system assignment to set up target side dedicated bearing for UE equally.

Subsequent step shown in Fig. 5 B can be existing procedure, no longer describes in detail in the present embodiment.

From the description of above-described embodiment five, at UE by 3GPP systematic evaluation in non-3 GPP system process, ePDG can obtain the information whether UE have employed GTP in source side system.EPDG when know in source side system have employed GTP and also use GTP in target side system, by knowing that bearing identification that source carries sets up the carrying of target side for this UE; EPDG also can not obtain the information that source side system adopts GTP, and when PGW is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and after knowing and also using GTP in target side system, the bearing identification that PGW obtains the source carrying of described terminal equipment carries for this UE sets up target side, and the bearing identification that the bearing identification that the target side of this UE is carried can not carry with source clashes; Thus avoid by the handoff failure phenomenon of 3GPP system to non-3 GPP system, improve the reliability of business.

Embodiment six, in the source side system and target side system of UE, all have employed GTP and under bearer management network element is the application scenarios of ePDG, UE is from 3GPP systematic evaluation to the carrying establishing method non-3 GPP system process.The flow process of the method is as shown in accompanying drawing 6 and accompanying drawing 5B.

Fig. 6 is the loading establishing process that UE accesses in 3GPP system, and Fig. 5 B is that UE is from 3GPP systematic evaluation to the loading establishing process non-3 GPP system.Fig. 5 B, as the description of above-described embodiment five, is not repeated.

In figure 6, S1, UE send AttachRequest message to SGSN, and the RequestType in AttachRequest message is set to " Initial Attach ".Here Initial Attach is used to indicate UE and initially accesses 3GPP system.

S2, SGSN, after receiving Attach Request message, send Update Location Request message, to obtain the subscription data of UE to HSS.HSS returns the Update Location Ack message of the subscription data including UE to SGSN.

S3, SGSN return Attach Accept message to UE after receiving Update Location Ack message.

S4, UE distribute NSAPI, and NSAPI here can be considered to a concrete manifestation mode of the bearing identification of current system carrying.UE sends the Activate PDP Context Request message including NSAPI to SGSN, in Activate PDP Context Request message, Request Type is set to " Initial Attach ".

S5, SGSN are after receiving Activate PDP Context Request message, and send the CreateSession Request message including the NSAPI that UE distributes, this message transfers to PGW via SGW.

S7, PGW are that UE sets up PDP Context (in follow-up handoff procedure, this PDP Context is called as source carrying or source default bearer), if PGW is the NSAPI Resources allocation that UE distributes.PGW sends the CreateSession Response message including bearing identification (i.e. NSAPI), and this message transfers to SGSN via SGW.

S8, SGSN send Activate PDP Context Response message to UE, successfully connect for this UE sets up PDP.Optionally, current network can be included in the Attach Accept message that SGSN sends to UE and use GTP indication information.

If S9 UE supports that 3GPP system is to the switching of non-3 GPP system, and SGSN have selected the PGW different from the PGW in subscription data, then SGSN sends Notify Request message to HSS, to be registered in HSS by the PGW id information that SGSN selects.If SGSN does not use the message notice of GTP agreement to UE by current network S5 or S8 reference point in S8 step, then SGSN can notify HSS: current network employs the information of GTP.The information comprised in the Notify Request message that HSS storage receives, and return Notify Response message to SGSN.The information that HSS stores can comprise the information that PGW ID and SGSN employs GTP.

From the description of above-described embodiment six, at UE by 3GPP systematic evaluation in non-3 GPP system process, ePDG when be informed in source side system have employed GTP and also use GTP in target side system, carried for this UE sets up target side by the bearing identification allowing PGW to carry according to source, the bearing identification that the bearing identification that the target side of this UE is carried can not carry with source clashes; Thus avoid by the handoff failure phenomenon of 3GPP system to non-3 GPP system, improve the reliability of business.

Embodiment seven, in the source side system of UE, S2b reference point uses GTP, have employed GTP in target side system and under the bearer management network element application scenarios that is MME, UE is switched to the carrying establishing method 3GPP systematic procedure from non-3 GPP system.The flow process of the method is as shown in accompanying drawing 7A and 7B.

Fig. 7 A is the loading establishing process that UE accesses in non-3 GPP system, and Fig. 7 B is that UE is switched to the loading establishing process 3GPP system from non-3 GPP system.

In fig. 7, S1, at authentication and tunnel establishment stage, network side determines to use GTP, network side instruction UE: network side employs GTP.S1 specifically can comprise S1a to S1e.Optionally, S1 can also comprise S1f.S1a to S1f, as the description in above-described embodiment three, is not repeated.

S2, ePDG are that UE distributes bearing identification, and transmission includes the Create Session Request message this bearing identification and S2b reference point using GTP indication information, under chained framework, the Create Session Request message received is transmitted to PGW by SGW.Above-mentioned S2b reference point use GTP indication information for notifying PGW:S2b reference point employs GTP.S2 illustrates as the description in above-described embodiment three.

S3, PGW are after receiving Create Session Request message, and by the information registering of oneself in HSS, as PGW initiates UpdatePDN GW Address process, this process can make aaa server and HSS upgrade the PGW information of its storage.In Update PDN GWAddress process, the bearing identification comprised in Create Session Request message can be transferred to HSS by PGW.HSS stores this bearing identification.

If do not comprise S1f in above-mentioned S1, then in S3, the information transmission that have employed GTP in the current network of UE can also be stored this information to HSS, HSS by PGW.

S4, PGW send Create Session Response message, and under chained framework, Create Session Response message transfers to ePDG via SGW.

In figure 7b, S1, UE send the Attach Request message including PDN Connectivity Request message to MME, in AttachRequest message, Request Type is set to " Handover ".Here Handover is used to indicate UE to be needed to switch between non-3 GPP system and 3GPP system.

It should be noted that, if do not comprise S1f in the S1 in Fig. 7 A, and, in the S3 of Fig. 7 A, PGW will not have employed the information transmission of GTP to HSS in the current network of UE, then in the S1 of Fig. 7 B, UE can send to MME by S2b reference point using GTP indication information be carried in Attach Request message.

S2, MME, after receiving Attach Request message, send Update Location Request message, to obtain the subscription data of UE to HSS.HSS returns the Update Location Ack message of the subscription data including UE, bearing identification S2b reference point employing GTP and source carrying to MME.

S3, MME are after receiving Update Location Ack message, not for UE newly distributes the bearing identification of target side carrying, and sending the Create Session Request message of the bearing identification including Handover instruction and source carrying, this message transfers to PGW via SGW.

S5, PGW are that UE sets up target side carrying (i.e. target side default bearer) according to the bearing identification of the source carrying in Create Session Request message, as the target side carrying Resources allocation that PGW is UE, PGW sends the Create Session Response message of the bearing identification including the carrying of target side, and this message transfers to MME via SGW.The bearing identification of the target side carrying comprised in the Create Session Response message that PGW sends in fact also is the bearing identification of source carrying, i.e. the bearing identification that carries as the target side of UE of the bearing identification that carried by the source of UE of PGW.

In the present embodiment, if PGW needs the Establishing process of target side dedicated bearing of initiating UE, then PGW needs according to the bearing identification of the source carrying in Create Session Request message equally for UE sets up target side dedicated bearing.

From the description of above-described embodiment seven, be switched in 3GPP systematic procedure at UE by non-3 GPP system, MME when know in source side system have employed GTP and target side system also uses GTP, send to PGW by the bearing identification carried as target side by the bearing identification of the source carrying obtaining this UE from HSS, the bearing identification that the bearing identification that the target side of this UE is carried can not carry with source clashes; Thus avoid by the handoff failure phenomenon of non-3 GPP system to 3GPP system, improve the reliability of business.

Embodiment eight, in the source side system and target side system of UE, all have employed GTP and under bearer management network element is the application scenarios of SGSN, UE is switched to the carrying establishing method 3GPP systematic procedure from non-3 GPP system.The flow process of the method is as shown in accompanying drawing 7A and accompanying drawing 8.

Fig. 7 A is the loading establishing process that UE accesses in non-3 GPP system, and Fig. 8 is that UE is switched to the loading establishing process 3GPP system from non-3 GPP system.Fig. 7 A, as the description of above-described embodiment seven, is not repeated.

In fig. 8, S1, UE send Attach Request message to SGSN, and the Request Type in Attach Request message is set to " Handover ".Here Handover is used to indicate UE to be needed to switch between non-3 GPP system and 3GPP system.

S2, SGSN, after receiving Attach Request message, send Update Location Request message, to obtain the subscription data of UE to HSS.HSS to SGSN return include UE subscription data, UE source side system in have employed the Update Location Ack message of the bearing identification of the information of GTP and source carrying.

S3, SGSN return Attach Accept message to UE after receiving Update Location Ack message.The information that have employed GTP in the source side system of UE is included in Attach Accept message.

S4, UE send Activate PDP Context Request message to SGSN, and in Activate PDP Context Request message, Request Type is set to " Handover ".The NSAPI that UE distributes is included in Activate PDP Context Request message.In addition, in the subsequent process activating PDP Context, the bearing identification that target side can carry by SGSN is carried at as NSAPI and activates in PDP Context response message, and send this response message to UE, no matter whether the NSAPI that the NSAPI in this response message distributes is identical, UE all should accept the NSAPI in this response message.

After S5, SGSN receive Activate PDP Context Request message, if SGSN judges that the value of the Request Type of this message is " Handover " and in the source side system of UE and target side system, PGW all employs GTP, then SGSN determines that the Activate PDP Context Request message received is legitimate messages, SGSN sends the Create Session Request message of the bearing identification including Handover instruction and source carrying, and this message transfers to PGW via SGW.If SGSN judges that the value of the RequestType of this message is not for PGW in " Handover " or source side system uses PGW in GTP or target side system not use GTP, then SGSN determines that the Activate PDP Context Request message received is invalid message, and SGSN can reply refuse information to UE.

S7, PGW are that UE sets up target side carrying (i.e. target side default bearer) according to the bearing identification of the source carrying comprised in Create Session Request message, PGW sends the Create Session Response message of the bearing identification (i.e. NSAPI) including the carrying of target side, and this message transfers to SGSN via SGW.

From the description of above-described embodiment eight, be switched in 3GPP systematic procedure at UE by non-3 GPP system, SGSN have employed the information of GTP when source accesses by obtaining this UE, can know that the source side system of UE have employed GTP, SGSN is when knowing that source side system have employed GTP and target side system also uses GTP, the bearing identification carried as target side by the bearing identification carried by the source of this UE obtained from HSS sends to PGW, and the bearing identification that the bearing identification that the target side of this UE is carried can not carry with source clashes; Thus avoid by the handoff failure phenomenon of non-3 GPP system to 3GPP system, improve the reliability of business.

Embodiment nine, in the source side system and target side system of UE, all have employed GTP and under bearer management network element is the application scenarios of ePDG, UE is from 3GPP systematic evaluation to the carrying establishing method non-3 GPP system process.The flow process of the method is as shown in accompanying drawing 9A and accompanying drawing 9B.

Fig. 9 A is the loading establishing process that UE accesses in 3GPP system, and Fig. 9 B is that UE is from 3GPP systematic evaluation to the loading establishing process non-3 GPP system.

In figure 9 a, S1, UE send the Attach Request message including PDN Connectivity Request message to MME, and in AttachRequest message, Request Type is set to " Initial Attach (initially adhering to) ".Here Initial Attach is used to indicate UE and initially accesses 3GPP system.

S3, MME send and include the Create Session Request message that MME is the bearing identification of the default bearer that this UE distributes after receiving Update Location Ack message, and this message transfers to PGW via SGW.

S6, MME send AttachAccept message to UE, successfully connect for this UE sets up PDN.Optionally, S5 or S8 reference point can be included in the Attach Accept message that MME sends to UE and use GTP indication information.

If S7 UE supports that 3GPP system is to the switching of non-3 GPP system, and MME have selected the PGW different from the PGW in subscription data, then MME sends Notify Request message to HSS, to be registered in HSS by the PGW id information that MME selects.S5 or S8 reference point can also be comprised in the Notify Request message that MME sends and employ the information of GTP and the bearing identification of above-mentioned default bearer.In addition, when UE supports 3GPP system to the switching of non-3 GPP system, even if MME have selected the PGW in subscription data, MME is in order to notify that HSS:S5 or S8 reference point employs the information of GTP and the bearing identification of above-mentioned default bearer, and MME also should send Notify Request message to HSS.The information comprised in the Notify Request message that HSS storage receives, and return Notify Response message to MME.The information that HSS stores can comprise PGW ID, S5 or S8 reference point and employ the information of GTP and the bearing identification of default bearer.

In figures 9 b and 9, S1, UE have accessed 3GPP system, and for this UE establishes GTP tunnel between SGW and PGW.

S3, execution IKEv2 authentication and IKEv2 tunnel establishment procedure.If UE supports that the IP address in handoff procedure retains, then it can be sent to ePDG in the IP address of source by UE.If UE receives S5 or S8 reference point at source and uses GTP indication information, then this indication information can be included in IKEv2 message and send to ePDG by UE in S3.In authentication between ePDG and aaa server and licensing process, the PGW ID obtained from HSS can be sent to ePDG by aaa server.In addition, S5 or the S8 reference point obtained from HSS can use the bearing identification (i.e. the bearing identification of above-mentioned default bearer) of GTP indication information and source carrying to send to ePDG by aaa server.

S4, ePDG send the Create Session Request message including Handover instruction to PGW.If ePDG receives the bearing identification that S5 or S8 reference point uses GTP indication information and source carrying, then ePDG is not the target side carrying distribution bearing identification of UE, comprises the bearing identification of source carrying in the Create Session Request message that namely ePDG sends.

If system supports PCC, then the present embodiment can comprise S5.S5, PGW initiate PCEF-Initiated IP CAN SessionModification process, thus obtain the strategy needing to perform.

S6, PGW are that UE sets up target side carrying (i.e. target side default bearer) according to the bearing identification in Create Session Request message, as the target side carrying Resources allocation that PGW is UE, PGW sends the CreateSession Response message of the bearing identification including the carrying of target side to ePDG.

Subsequent step shown in Fig. 9 B can be existing procedure, no longer describes in detail in the present embodiment.

From the description of above-described embodiment nine, at UE by 3GPP systematic evaluation in non-3 GPP system process, ePDG have employed the information of GTP when source accesses by obtaining this UE, can know that the source side system of UE have employed GTP, ePDG have employed GTP knowing in source side system, and when also using GTP in target side system, the bearing identification carried as target side by the bearing identification carried by the source of this UE obtained from HSS/AAA sends to PGW, the bearing identification that the bearing identification that the target side of this UE is carried can not carry with source clashes, thus avoid by the handoff failure phenomenon of 3GPP system to non-3 GPP system, improve the reliability of business.

Embodiment ten, bearer management network element.This bearer management network element can be MME or SGSN or ePDG.Be switched in 3GPP systematic procedure at terminal equipment by non-3 GPP system, the bearer management network element in the present embodiment can be MME, also can be SGSN.At terminal equipment by 3GPP systematic evaluation in non-3 GPP system process, the bearer management network element in the present embodiment can be ePDG.The structure of this bearer management network element as shown in figure 10.

Bearer management network element in Figure 10 A comprises: acquisition module 1000 and control module 1010.

Acquisition module 1000, in handoff procedure, knowing that source side system have employed GTP at terminal equipment between third generation Partnership Program 3GPP system and non-3 GPP system, and knows in target side system and also uses GTP.By obtaining the information that have employed GTP in source side system, acquisition module 1000 can know that source side system have employed GTP, this information can indicate between PGW and SGW or between PGW and ePDG and establish GTP tunnel.Acquisition module 1000 can obtain this information from other network entity.Acquisition module 1000 can comprise at least one in the first acquisition submodule 1001, second acquisition submodule 1002 and the 3rd acquisition submodule 1003:

First obtains submodule 1001, for being switched in 3GPP systematic procedure at terminal equipment by non-3 GPP system, obtains the information that have employed GTP in source side system from HSS.

Second obtains submodule 1002, for being switched in 3GPP systematic procedure by non-3 GPP system at terminal equipment, or at terminal equipment by 3GPP systematic evaluation in non-3 GPP system process, obtain in source side system the information that have employed GTP from terminal equipment.

3rd obtains submodule 1003, at terminal equipment by 3GPP systematic evaluation in non-3 GPP system process, obtain in source side system the information that have employed GTP from aaa server.

Control module 1010, for know in source side system when acquisition module 1000 have employed GTP and know also use GTP in target side system time, obtain the bearing identification of the source carrying of described terminal equipment, the bearing identification that the bearing identification carried by source carries as the target side of described terminal equipment.Optionally, if acquisition module 1000 does not get in source side system the information that have employed GTP or control module 1010 and determines in target side system and do not adopt GTP, then control module 1010 controls the target side carrying that PGW sets up according to existing control mode, a concrete control example: control module 1010 is that the carrying of target side distributes bearing identification, when the bearing identification of the bearing identification that the target side comprised in the message that PGW returns carries and this distribution is inconsistent, the bearing identification of the target side carrying that refusal PGW returns.Above-mentioned PGW is the target side carrying that terminal equipment is set up: PGW is the target side default bearer that terminal equipment is set up, and also can be: PGW is the target side dedicated bearing that terminal equipment is set up.

In the present embodiment, control module 1010 obtains the bearing identification of the source carrying of described terminal equipment, be specifically as follows: control module 1010 is from HSS or the bearing identification obtaining source carrying from aaa server, and control module 1010 also can obtain the bearing identification of source carrying from PGW.

Concrete, it is any one or more that the structure of control module 1010 can comprise in accompanying drawing 10B, 10C and 10D.

When control module 1010 is from HSS or when obtaining the bearing identification of source carrying from aaa server, the control module 1010 in Figure 10 B comprises: bearing identification submodule 1011 and first sends submodule 1012 and the first control submodule 1013.

Bearing identification submodule 1011, for the bearing identification from HSS or the source carrying from aaa server acquisition terminal equipment.

Bearing identification submodule 1011 can comprise any one or two in first module 10111 and second unit 10112.

First module 10111, for obtaining the bearing identification of the source carrying of terminal equipment from HSS.

Second unit 10112, for obtaining the bearing identification of the source carrying of terminal equipment from aaa server.

First sends submodule 1012, for sending the message (as session establishment request message) of the bearing identification including source carrying to PGW.

First controls submodule 1013, for the bearing identification that the bearing identification that carried by described source carries as the target side of described terminal equipment.

When control module 1010 obtains the bearing identification of source carrying from PGW, the control module 1010 in Figure 10 C comprises: allocation identification submodule 1014, second sends submodule 1015 and second and controls submodule 1016.

Allocation identification submodule 1014, for distributing the bearing identification of the target side carrying of this terminal equipment for terminal equipment.

Second sends submodule 1015, for sending the message (as session establishment request message) of the bearing identification including the target side carrying that allocation identification submodule 1014 distributes to PGW.

Second controls submodule 1016, and for obtaining the bearing identification in session establishment response message that described PGW returns, the wherein said carrying returned is denoted as the bearing identification of source carrying; The bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment.

When control module 1010 obtains the bearing identification of source carrying from PGW, the control module 1010 in Figure 10 D comprises: the 3rd sends submodule 1017 and the 3rd controls submodule 1018.

3rd sends submodule 1017, for sending the message (as session establishment request message) including the bearing identification retaining numerical value or the message (as session establishment request message) not comprising bearing identification to PGW.

3rd controls submodule 1018, obtains the bearing identification in the session establishment response message that described PGW returns, and the wherein said carrying returned is denoted as the bearing identification of source carrying; The bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment.A concrete example: the 3rd sends in the session establishment request message that submodule 1017 sends and include the bearing identification retaining numerical value, 3rd controls submodule 1018 obtains the bearing identification comprised in the message that PGW returns, and using this bearing identification as target side bearing identification.

From the description of above-described embodiment ten, at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, control module 1010 is by obtaining the bearing identification of the source carrying of described terminal equipment, and the bearing identification that the bearing identification carried by source carries as the target side of described terminal equipment, the bearing identification that the bearing identification that the target side of this terminal equipment is carried can not carry with source clashes; Thus avoid the phenomenon of handoff failure, finally improve the reliability of business.

Another the structure chart of bearer management network element embodiment of Figure 13 the present invention comprises: allocation identification module 1310, sending module 1320 and control module 1330.

Allocation identification module 1310, for distributing the bearing identification of the target side carrying of this terminal equipment for terminal equipment.

Sending module 1320, for sending the message (as session establishment request message) of the bearing identification including the target side carrying that allocation identification module 1310 is distributed to PGW.

Acquisition module 1330, obtains the bearing identification in the session establishment response message of described PGW transmission and indication information, and wherein said carrying is denoted as the bearing identification of source carrying;

Control module 1340, for the bearing identification that the bearing identification that carried by described source according to indication information carries as the target side of described terminal equipment.

Embodiment 11, packet data gateway PGW.The structure of PGW as shown in Figure 11.

PGW in Figure 11 comprises: know module 1100, set up module 1110 and sending module 1120.

Know module 1100, in handoff procedure, knowing in source side system whether have employed GTP at terminal equipment between 3GPP system and non-3 GPP system, and know in target side system and have employed GTP, be namely informed in after this terminal equipment switches and still have employed GTP.

Set up module 1110, for know module 1100 know in source side system have employed GTP and also use GTP in target side system time, the bearing identification that the bearing identification carried by the source of this terminal equipment carries as the target side of this terminal equipment sets up target side carrying (as target side default bearer and/or target side dedicated bearing) for this terminal equipment.If pre-set the bearing identification including source carrying in the message that bearer management network element sends to PGW, the bearing identification that the bearing identification then setting up the source carrying comprised in the message (as session establishment request message) that bearer management network element can directly send by module 1110 carry as the target side of this terminal equipment is set up target side for this terminal equipment and is carried, as being that target side carries Resources allocation etc.If pre-set the bearing identification not comprising source carrying in the message that bearer management network element sends to PGW, then the configuration information setting up the carrying correspondence that module 1110 can store according to this locality determine the bearing identification that source carries.

Described PGW can further include sending module 1120, for sending the message (as session establishment response message) including above-mentioned bearing identification to bearer management network element.That is, sending module 1120 sends the message of the bearing identification including source carrying to bearer management network element.Sending module 1120 comprises the first transmission submodule 1121 and second and sends one that obtains in submodule 1122.

First sends submodule 1121, for sending the message of the bearing identification including source carrying to bearer management network element.

Second sends submodule 1122, includes the bearing identification of source carrying and the message of instruction for sending to bearer management network element.Then now corresponding bearer management network element comprises: allocation identification module 1310, sending module 1320 and control module 1330.

From the description of above-described embodiment 11, at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, setting up module 1110 knowing in source side system have employed GTP and after also use GTP in target side system, the bearing identification carried as the target side of this terminal equipment by the bearing identification that carried by this source sets up the carrying of target side for this terminal equipment, and the bearing identification that the bearing identification that the target side of this terminal equipment is carried can not carry with source clashes; Thus avoid the phenomenon of handoff failure, improve the reliability of business.

Embodiment 12, carrying set up system.This system as shown in Figure 12.

Carrying shown in Figure 12 is set up system and is comprised: bearer management network element 1200 and PGW1210.Bearer management network element 1200 can be MME or SGSN or ePDG.Be switched in 3GPP systematic procedure at terminal equipment by non-3 GPP system, the bearer management network element 1200 in the present embodiment can be MME, also can be SGSN.At terminal equipment by 3GPP systematic evaluation in non-3 GPP system process, the bearer management network element 1200 in the present embodiment can be ePDG.Wherein this system comprises following several situation:

One, bearer management network element 1200, for at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, if bearer management network element 1200 is known in source side system have employed General Packet Radio System tunnel protocol GTP, and know in target side system and also use GTP, then bearer management network element 1200 from HSS or from aaa server obtain described terminal equipment source carrying bearing identification, the bearing identification that the bearing identification that described source carries by bearer management network element 1200 carries as the target side of described terminal equipment, and the session establishment request message of the bearing identification including the carrying of described source is sent to described PGW1210

PGW1210, for receiving the session establishment request message including the bearing identification of described source carrying that bearer management network element 1200 sends, obtain the bearing identification of the source carrying of described terminal equipment, and the bearing identification that bearing identification carry by the source of this terminal equipment carries as the target side of this terminal equipment is set up target side for this terminal equipment and is carried.

Two, bearer management network element 1200, for at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, if bearer management network element 1200 is known in source side system have employed General Packet Radio System tunnel protocol GTP, and know in target side system and also use GTP, then bearer management network element 1200 is the bearing identification that described terminal equipment distributes the target side carrying of described terminal equipment; The session establishment request message of the bearing identification including the carrying of described target side is sent to described PGW; Obtain the bearing identification in the session establishment response message that described PGW returns, the wherein said carrying returned is denoted as the bearing identification of source carrying; The bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment;

PGW1210, has used General Packet Radio System tunnel protocol GTP for knowing in source side system, and knows in target side system and have employed GTP; Receive the session establishment request message including the bearing identification of described target side carrying that bearer management network element 1200 sends; Obtain the bearing identification of the source carrying of described terminal equipment, the bearing identification that the bearing identification carried by the source of described terminal equipment carry as the target side of described terminal equipment sets up the carrying of target side for this terminal equipment, and includes the message of the bearing identification that described source carries to the transmission of bearer management network element.

Three, bearer management network element 1200, for at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, if bearer management network element 1200 is known in source side system have employed General Packet Radio System tunnel protocol GTP, and know in target side system and also use GTP, then bearer management network element 1200 sends the session establishment request message including the bearing identification retaining numerical value or the session establishment request message not comprising bearing identification to described PGW; Obtain described PGW and return bearing identification in the session establishment response message of 1210 times, the wherein said carrying returned is denoted as the bearing identification of source carrying; The bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment;

PGW1210, for receiving including the session establishment request message of the bearing identification retaining numerical value or not comprising the session establishment request message of bearing identification of bearer management network element 1200 transmission, obtain the bearing identification of the source carrying of terminal, the bearing identification that bearing identification carry by the source of this terminal equipment carries as the target side of this terminal equipment is set up target side for this terminal equipment and is carried.

Four, bearer management network element 1200, for sending the message (as session establishment request message) of the bearing identification of the target side carrying that described bearer management network element 1200 distributes to PGW1210, receive the message (as session establishment response message) that PGW1210 returns, and according to instruction wherein, accept the bearing identification that source bearing identification that PGW1210 returns carries as target side.

PGW1210, has used General Packet Radio System tunnel protocol GTP for knowing in source side system, and knows in target side system and have employed GTP; Receive the session establishment request message that bearer management network element 1200 sends, obtain the bearing identification of the source carrying of described terminal equipment, the bearing identification that the bearing identification carried by the source of described terminal equipment carry as the target side of described terminal equipment sets up the carrying of target side for this terminal equipment, includes the message of the bearing identification that indication information and described source carry to the transmission of bearer management network element.

Optionally, the system in the present embodiment can also comprise: SGW, aaa server and HSS etc., the operation specific embodiment of the method as above described that each network equipment performs, and is not repeated.

From the description of above-described embodiment 12, at terminal equipment between 3GPP system and non-3 GPP system in handoff procedure, the bearing identification that bearer management network element 1200 source bearing identification carries as target side, PGW1210 sets up target side according to the bearing identification that source carries for this terminal equipment and carries, and the bearing identification that the bearing identification that the target side of this terminal equipment is carried can not carry with source clashes; Thus avoid the phenomenon of handoff failure, finally improve the reliability of business.

It should be noted that for the various embodiments described above, the system that source side system in the various embodiments described above initially can access for terminal equipment, at terminal equipment after successful switch to target side system, this target side system can become source side system in the handoff procedure between upper once 3GPP system and non-3 GPP system.Above-described embodiment three to embodiment nine is described with the example that switches to occurred between 3GPP system and non-3 GPP system after the initial connecting system of terminal equipment, and technical scheme provided by the invention is equally applicable to the application scenarios of terminal equipment generation secondary or the switching between more times 3GPP system and non-3 GPP system.

Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required hardware platform by software and realize, can certainly all be implemented by hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, what technical scheme of the present invention contributed to background technology can embody with the form of software product in whole or in part, and described software product may be used for performing above-mentioned method flow.This computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the present invention or embodiment.

Although depict the present invention by embodiment, those of ordinary skill in the art know, the present invention has many distortion and change and do not depart from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and change.

Claims

1. an acquisition methods for the bearing identification of target side carrying, is characterized in that, comprising:

2. the method for claim 1, is characterized in that, described method comprises: the bearing identification that described bearer management network element obtains the source carrying of described terminal equipment comprises:

Described bearer management network element is from HSS or the bearing identification obtaining the carrying of described source from aaa server.

3. method as claimed in claim 2, is characterized in that, the bearing identification carried by described source also comprises after the bearing identification that the target side of described terminal equipment carries:

The session establishment request message of the bearing identification carrying the carrying of described source is sent to PGW by described bearer management network element,

Described PGW obtains the bearing identification of described source carrying, and the bearing identification that the bearing identification carried by described source carry as the target side of described terminal equipment is set up target and carried.

4. the method for claim 1, it is characterized in that, described method comprises: described bearer management network element obtains the bearing identification of the source carrying of described terminal equipment, and the bearing identification that the bearing identification that described source carries by bearer management network element carries as the target side of described terminal equipment comprises:

Session establishment request message is sent to PGW by described bearer management network element, obtains the bearing identification in the session establishment response message that described PGW returns, and the wherein said bearing identification returned is the bearing identification of source carrying; The bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment.

5. method as claimed in claim 4, it is characterized in that, described session establishment request message carries the bearing identification of predetermined value or does not carry bearing identification.

6. method as claimed in claim 4, it is characterized in that, described session establishment request message carries the bearing identification that bearer management network element distributes, also comprise before the bearing identification that then PGW returns in session establishment response message: know in source side system and have employed General Packet Radio System tunnel protocol GTP, and know in target side system and also use GTP.

7. as the method as described in arbitrary in claim 4-6, described bearer management network element also comprises after session establishment request message is sent to described PGW: described PGW obtains the bearing identification of source carrying, and the bearing identification that the bearing identification carried by described source carry as the target side of described terminal equipment is set up target and carried.

8. method as claimed in claim 2, it is characterized in that, bearer management network element knows in source side system that have employed General Packet Radio System tunnel protocol GTP specifically comprises:

Described bearer management network element obtains the information that have employed GTP in described source side system from home network server HSS; Or

Described bearer management network element obtains the information that have employed GTP in described source side system from described terminal equipment.

9. method as claimed in claim 8, is characterized in that:

Described bearer management network element also comprised have employed the information of GTP from the described source side system of home network server HSS acquisition before: be linked in described non-3 GPP system process at described terminal equipment, HSS, in Authentication Authorization process, obtains and stores the information that have employed GTP in current non-3 GPP system from the message that Authentication Authorization and charging aaa server send; Or

Described bearer management network element also comprised have employed the information of GTP from the described source side system of home network server HSS acquisition before: be linked in described non-3 GPP system process at described terminal equipment, HSS upgrades in the process of the PGW address in aaa server and HSS at PGW, obtains and store the information that have employed GTP in described current non-3 GPP system from the message that Authentication Authorization and charging aaa server send; Or

Described bearer management network element also comprised obtain the information that have employed GTP in described source side system from described terminal equipment before: be linked in described non-3 GPP system process at described terminal equipment, and described terminal equipment obtains and stores the information that described current non-3 GPP system have employed GTP from the message that the packet data gateway ePDG of evolution sends.

10. method as claimed in claim 2, it is characterized in that, bearer management network element knows in source side system that have employed General Packet Radio System tunnel protocol GTP specifically comprises:

Described bearer management network element obtains the information that have employed GTP in described source side system from aaa server, and described aaa server obtains from HSS the information that have employed GTP in described source side system; Or

11. methods as claimed in claim 10, is characterized in that:

The information that have employed GTP in the described source side system that described HSS stores comprises: be linked in described 3GPP systematic procedure at described terminal equipment, described HSS obtains and have employed the information of GTP in the current 3GPP system stored from the message that mobile management network element MME or Serving GPRS Support Node SGSN sends; Or

The information that have employed GTP in the described source side system that described terminal equipment stores comprises: be linked in 3GPP systematic procedure at described terminal equipment, described terminal equipment obtains and have employed the information of GTP in the current 3GPP system stored from the message that bearer management network element sends.

The acquisition methods of the bearing identification of 12. 1 kinds of target side carryings, is characterized in that, comprising:

Bearing identification in the session establishment response message that bearer management network element acquisition PGW sends and indication information, wherein said bearing identification is the bearing identification of source carrying;

13. methods as claimed in claim 12, described bearer management network element obtain described PGW send session establishment response message in bearing identification and indication information before comprise:

Session establishment request message is sent to described PGW by described bearer management network element, and described session establishment request message carries the bearing identification that bearer management network element distributes.

14. methods as claimed in claim 12, PGW also comprises before sending the bearing identification in session establishment response message, and: PGW is known in source side system and be have employed General Packet Radio System tunnel protocol GTP, and knows in target side system and also use GTP.

15. as the method as described in arbitrary in claim 13-14, and described method also comprises: described PGW obtains the bearing identification of source carrying, and the bearing identification that the bearing identification carried by described source carry as the target side of described terminal equipment is set up target and carried.

The acquisition methods of the bearing identification of 16. 1 kinds of target side carryings, it is characterized in that, described method comprises:

Described PGW obtains the bearing identification of the source carrying of terminal equipment,

17. methods as claimed in claim 16, it is characterized in that, described method also comprises:

PGW sends session establishment response message to bearer management network element, wherein said session establishment response message comprises the bearing identification of source carrying, the bearing identification that the bearing identification that described source carries by described bearer management network element carries as the target side of described terminal equipment.

18. methods as claimed in claim 16, it is characterized in that, described method also comprises:

P-GW sends session establishment response message to bearer management network element, wherein said session establishment response message comprises the bearing identification of indication information and source carrying, the bearing identification that the bearing identification that described source carries according to described indication information by described bearer management network element carries as the target side of described terminal equipment.

19. 1 kinds of bearer management network elements, is characterized in that, comprising:

Acquisition module, for, knowing in source side system and have employed general packet wireless service tunnel protocol GTP in handoff procedure at terminal equipment between third generation Partnership Program 3GPP system and non-3 GPP system, and knows in target side system and also uses GTP;

20. bearer management network elements as claimed in claim 19, is characterized in that, described acquisition module comprise following at least one:

First obtains submodule, for being switched in 3GPP systematic procedure at terminal equipment by non-3 GPP system, obtains the information that have employed GTP in described source side system from home network server HSS; Or

Second obtains submodule, for being switched in 3GPP systematic procedure at terminal equipment by non-3 GPP system, or at terminal equipment by 3GPP systematic evaluation in non-3 GPP system process, obtain the information that have employed GTP in described source side system from described terminal equipment; Or

3rd obtain submodule, at terminal equipment by 3GPP systematic evaluation in non-3 GPP system process, obtain the information that have employed GTP in described source side system from aaa server.

21. bearer management network elements as described in claim 19 or 20, it is characterized in that, described control module comprises:

Bearing identification submodule, for from HSS or from aaa server obtain described terminal equipment source carrying bearing identification;

First sends submodule, for sending the session establishment request message of the bearing identification including the carrying of described source to described PGW;

First controls submodule, for the bearing identification that the bearing identification that carried by described source carries as the target side of described terminal equipment.

22. bearer management network elements as described in claim 19 or 20, is characterized in that, the bearing identification that described control module obtains the source carrying of described terminal equipment is specially: described control module obtains from PGW the bearing identification that source carries.

23. bearer management network elements as claimed in claim 22, it is characterized in that, described control module comprises:

Allocation identification submodule, for distributing the bearing identification of the target side carrying of described terminal equipment for described terminal equipment;

Second sends submodule, for sending the session establishment request message of the bearing identification including the carrying of described target side to described PGW;

Second controls submodule, and for obtaining the bearing identification in session establishment response message that described PGW returns, the wherein said bearing identification returned is the bearing identification of source carrying; The bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment;

Or described control module comprises:

3rd sends submodule, for sending the session establishment request message including the bearing identification retaining numerical value or the session establishment request message not comprising bearing identification to described PGW;

3rd controls submodule, and for obtaining the bearing identification in session establishment response message that described PGW returns, the wherein said bearing identification returned is the bearing identification of source carrying; The bearing identification that the bearing identification carried by described source carries as the target side of described terminal equipment.

24. 1 kinds of bearer management network elements, is characterized in that, comprising: at terminal equipment between third generation Partnership Program 3GPP system and non-3 GPP system in handoff procedure,

Acquisition module, for obtain PGW send session establishment response message in bearing identification and indication information, wherein said bearing identification be source carrying bearing identification;

25. bearer management network elements as claimed in claim 24, is characterized in that, also comprise:

Allocation identification module, for distributing the bearing identification of the target side carrying of this terminal equipment for terminal equipment.

Sending module, for sending the session establishment request message of the bearing identification of the target side carrying including allocation identification module assignment to PGW.

26. 1 kinds of packet data gateway, is characterized in that, comprising:

27. packet data gateway as claimed in claim 26, it is characterized in that, described packet data gateway also comprises: the first sending module, for sending the session establishment response message of the bearing identification including the carrying of described source to bearer management network element.

28. packet data gateway as claimed in claim 26, it is characterized in that, described packet data gateway also comprises: the second sending module, for sending the session establishment response message of bearing identification including indication information and source carrying to bearer management network element, described indication information is used to indicate the bearing identification that bearing identification that described source carries by bearer management network element carries as the target side of described terminal equipment.