CN103379569A - Trigger method and trigger apparatus of flow migration - Google Patents
Trigger method and trigger apparatus of flow migration Download PDFInfo
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- CN103379569A CN103379569A CN201210112910XA CN201210112910A CN103379569A CN 103379569 A CN103379569 A CN 103379569A CN 201210112910X A CN201210112910X A CN 201210112910XA CN 201210112910 A CN201210112910 A CN 201210112910A CN 103379569 A CN103379569 A CN 103379569A
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Abstract
The invention discloses a trigger method and a trigger apparatus of flow migration. The method comprises steps that UE (user equipment) simultaneously accesses to a 3GPP (3rd Generation Partnership Project) core network through a 3GPP access network and a non-3GPP access network; when the UE initiates IP flow migration, the migration of IP flows of the UE is triggered and performed through the 3GPP access network; when the UE leaves the coverage of the 3GPP access network or any abnormity occurs in the 3GPP access network, the UE triggers the IP flow migration of the UE through the non-3GPP access network, and the IP flows of the UE is all migrated t the non-3GPP access network from the 3GPP access network. Through the trigger method and the trigger apparatus of flow migration, accessed services through the 3GPP access network can be guaranteed to be normally migrated to the non-3GPP access network when the UE moves out from the coverage of the 3GPP access network or any abnormity occurs in the 3GPP access network.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of triggering method and device of stream migration.
Background technology
Third generation partner program (3rd Generation Partnership Project, referred to as 3GPP) grouping system (the Evolved Packet System of evolution, referred to as EPS) main packet-based core networks (Evolved Packet Core is referred to as EPC) composition by Access Network and evolution.In system as shown in Figure 1, the EPS Access Network can be universal land radio access web (the Evolved Universal Terrestrial Radio Access Network of evolution, referred to as E-UTRAN) or universal land radio access web (Universal Terrestrial Radio Access Network is referred to as UTRAN) etc.; EPC comprises: mobile management unit (Mobility Management Entity, referred to as MME), Serving GPRS Support Node (Serving GPRS (General Packet Radio Service, general packet radio service) SupportNode, referred to as SGSN), gateway (Serving Gateway, referred to as S-GW), grouped data network gateway (Packet DataNetwork Gateway, referred to as P-GW), home subscriber server (Home Subscriber Server, referred to as HSS), 3GPP authentication and authorization charging server (Authentication, Authorization and Accounting, referred to as AAA) server, "Policy and Charging Rules Function (Policy and Charging Rules Function is referred to as PCRF) and other support node.
Wherein, there is the base station (evolved NodeB is referred to as eNB) of evolution E-UTRAN inside, and there is base station (NodeB is referred to as NB) UTRAN inside; MME is responsible for subscriber equipment (User Equipment, referred to as UE) from mobile management, Non-Access Stratum (Non Access Stratum is referred to as NAS) processing of signaling and the chain of command related works such as management of user's context of E-UTRAN access; SGSN is responsible for UE from mobile management, the processing of Non-Access Stratum signaling and the work such as management of user's context of E-UTRAN access; S-GW is the accessing gateway equipment that links to each other with E-UTRAN, forwarding data between E-UTRAN and P-GW, and be responsible for the pending datas such as paging are carried out buffer memory.P-GW is the borde gateway of 3GPP evolved packet system and packet data network (Packet Data Network is referred to as PDN), is responsible for UE and reaches between EPS and PDN forwarding data etc. to the access of PDN.Link to each other by the S5/S8 interface between S-GW and the P-GW, adopt general packet radio service tunnel agreement (General Packet Radio Service Tunneling Protocol, referred to as GTP) agreement or proxy-mobile IP version 6 (Proxy Mobile IP version 6 is referred to as PMIPv6) agreement.PCRF is the "Policy and Charging Rules Function entity, link to each other with the IP operation network that operator provides by Rx interface, obtain business information, and link to each other with gateway device in the network by the Gx/Gxa/Gxb/Gxc interface, be responsible for initiating the foundation of Internet protocol (Internet Protocol is referred to as IP) carrying, guarantee service quality (the Quality of Service of business datum, referred to as QoS), and carry out charging control.
In addition, EPS also supports UE to pass through the access of other non-3 GPP system except E-UTRAN, and wherein, the access of non-3 GPP system can be passed through the S2a/S2b/S2c Interface realization, at this moment, P-GW is as the data anchor point of the access of the access of 3GPP system and non-3 GPP system.In the system architecture of EPS, non-3 GPP system is divided into the non-3GPP IP of trusted Access Network (Trusted non-3GPP IPAccess) and trustless non-3GPP IP Access Network (Untrusted non-3GPP IPAccess).The non-3GPP IP of trusted Access Network can directly be connected with P-GW by the S2a interface; Trustless non-3GPP IP Access Network need to link to each other with P-GW through the packet data gateway (Evolved Packet Data Gateway is referred to as ePDG) of evolution, and the interface between ePDG and P-GW is S2b.The S2a/S2b interface all can adopt GTP or PMIPv6 agreement.
At present, research topic to EPS concentrates on multiple access (Multiple Access) and stream migration (IP flow mobility), wherein, multiple access is to make EPC support that UE accesses a PDN by multiple Access Network simultaneously through same P-GW, can be linked into simultaneously same P-GW by 3GPP Access Network (E-UTRAN Access Network or UTRAN Access Network) and trusted non-3 GPP access network (such as the WLAN Access Network) simultaneously such as UE, P-GW sets up and the tunnel of S-GW and the tunnel that closes with non-3 GPP access network simultaneously, perhaps UE can be linked into same P-GW by 3GPP Access Network (EUTRAN Access Network or UTRAN Access Network) and trustless non-3 GPP access network (such as the WLAN Access Network) simultaneously simultaneously, P-GW set up simultaneously with the tunnel of S-GW and with the tunnel of ePDG.Under this scene, UE is attached to EPC by a plurality of Access Networks, and P-GW is that UE distributes an IP address, exists an IP to connect (shown in the dotted line among Fig. 1) between UE and the PDN.Because different business is applicable to adopt different Internet Transmissions, multi-access technology can be selected applicable Access Network transport service according to the characteristic of business, and a plurality of Access Networks can be shared network load, can avoid network congestion.
Research along with multi-access technology, operator is in order to provide attractive business function and the service of having more, can the supporting business data flow migration between 3GPP and non-3GPP access, such as: during UE accesses 3GPP and non-3GPP simultaneously, if UE is moved, not in the non-3GPP overlay area, but still in the overlay area of 3GPP, then can will pass through the business migration of non-3GPP access to the 3GPP network; Perhaps, if the non-3GPP network congestion, the business migration that UE can be high with requirement of real-time is to the 3GPP network.
At present, there has been the multiple technologies scheme, comprise: mobility management protocol is for supporting Mobile IP (the Moblie IP Support for Dual Stack Hosts and Routers of two stacks, referred to as DSMIP) enhanced scheme, proxy mobile internet protocol (Proxy Mobile IP, referred to as PMIP) enhanced scheme etc., these schemes all are need to be in the related news of IETF or non-3GPP network, support to transmit stream migration information, but not the 3GPP network is difficult to form unified standard because there is multiple types.Correlation technique has proposed a kind of 3GPP enhanced scheme, and the related news by the 3GPP network transmit stream migration information, and as shown in Figure 2, this scheme comprises following step (step S201-step S211):
Step S201: terminal UE is all adhered at 3GPP Access Network and non-3 GPP access network, and has set up one or more PDN connection, and realizes many bindings that PDN connects.
Step S202: terminal UE is carried stream migration information to the MME A that sends a request message in this message, is used to indicate the IP stream that will move.
After step S203:MME receives request message A, to the S-GW B that sends a request message, carry stream migration information in this message, be used to indicate the IP stream that will move.
After step S204:S-GW receives request message A, to the P-GW C that sends a request message, carry stream migration information in this message, be used to indicate the IP stream that will move.
Carry out the flow process of Internet protocol connected reference network (IP Connectivity AccessNetwork is referred to as IP-CAN) session modification between step S205:P-GW and the PCRF.
Between step S206-step S208:P-GW and the UE for the response of the request message of step S202-step S204.
Step S209: non-3GPP network side is carried out the operation of bearing resource activation/modification/deexcitation.
Step S210:3GPP network side is carried out the operation of bearing resource activation/modification/deexcitation.
Step S211:P-GW is moved to non-3GPP/3GPP with IP stream from the non-3GPP of 3GPP/.
In above-mentioned steps, no matter IP stream is moved to non-3GPP from 3GPP still moves to 3GPP from non-3GPP, and stream migration information all is to transmit from the 3GPP network.Yet, if UE moves out the 3GPP overlay area or the 3GPP Network Abnormal interrupts, will cause UE to carry out the stream migration communication by the 3GPP network, thereby the IP stream migration by the 3GPP network insertion can't be arrived non-3GPP network, and then cause the stream migration failure.
Summary of the invention
In correlation technique, when UE initiates the IP stream migration, trigger and carry out the migration of the IP stream of UE by the 3GPP Access Network; Leaving the covering of 3GPP Access Network or 3GPP Access Network at UE occurs when unusual, UE can't cause the IP stream migration by the access of 3GPP Access Network the problem of IP stream migration failure to non-3 GPP access network, the invention provides a kind of triggering method and device of stream migration, to address the above problem at least.
According to an aspect of the embodiment of the invention, a kind of triggering method of stream migration is provided, comprising: user equipment (UE) is linked into the 3GPP core net by third generation partner program 3GPP Access Network and non-3 GPP access network simultaneously; When described UE initiates the Internet protocol IP stream migration, trigger and carry out the migration of the IP stream of described UE by described 3GPP Access Network; Leaving the covering of described 3GPP Access Network or described 3GPP Access Network at described UE occurs when unusual, described UE triggers the IP stream migration of described UE by described non-3 GPP access network, and the IP stream of described UE is all moved to described non-3 GPP access network from described 3GPP Access Network.
Preferably, described UE triggers the migration of the IP stream of described UE by described non-3 GPP access network, comprise: described UE sends the IP stream migration to described non-3 GPP access network network element and triggers message, and wherein, described IP stream migration triggers and carries all migration indications of IP stream in the message; Described non-3 GPP access network network element notifies described 3GPP core network element that whole IP streams of described UE are moved to described non-3 GPP access network from described 3GPP Access Network.
Preferably, described non-3 GPP access network network element notifies described 3GPP core network element that whole IP streams of described UE are moved to described non-3 GPP access network from described 3GPP Access Network, comprise: described non-3 GPP access network network element sends IP stream migration message to described 3GPP core network element, wherein, carry all migration indications of described IP stream in the described IP stream migration message; Described 3GPP core network element receives described IP stream migration message, and according to the whole migration indications of described IP stream whole IP streams of described UE is moved to non-3 GPP access network from the 3GPP Access Network.
Preferably, all move indication according to described IP stream whole IP streams of described UE are moved to non-3 GPP access network from the 3GPP Access Network, comprise: described 3GPP core network element is carried out the related resource of IP stream migration and is set up/revise/the deletion processing, and the IP stream of described UE is moved to non-3 GPP access network from the 3GPP Access Network.
Preferably, described IP stream migration triggers message and comprises one of following: the Internet secret key switch version 2IKEv2 message, RSVP RSVP message, session initiation protocol sip message, the proprietary bearing resource request message of non-3GPP.
Preferably, described IP stream migration message comprises one of following: general packet radio service tunnel agreement GTP message, proxy mobile internet protocol PMIP message, strategy and charging control PCC message.
Preferably, described non-3 GPP access network network element comprises: non-3 GPP access network gateway trusty, perhaps the packet data gateway ePDG of the evolution of fly-by-night non-3 GPP access network.
Preferably, described 3GPP core network element comprises: grouped data network gateway P-GW and/or "Policy and Charging Rules Function PCRF.
Preferably, when described 3GPP core network element is P-GW, described non-3 GPP access network network element notifies described 3GPP core network element that whole IP streams of described UE are moved to described non-3 GPP access network from described 3GPP Access Network, and comprising: described non-3 GPP access network network element sends described IP stream migration message to described P-GW; Described P-GW sends described IP-CAN session modification message to described PCRF.
Preferably, when described 3GPP core network element is PCRF, described non-3 GPP access network network element notifies described 3GPP core network element that whole IP streams of described UE are moved to described non-3 GPP access network from described 3GPP Access Network, and comprising: described non-3 GPP access network network element sends described IP stream migration message to described PCRF.
According to another aspect of the present invention, provide a kind of trigger equipment of stream migration, having comprised: access module is used for being linked into the 3GPP core net by third generation partner program 3GPP Access Network and non-3 GPP access network simultaneously; The first transferring module when being used for initiating the Internet protocol IP stream migration, triggers and carries out the migration of the IP stream of described UE by described 3GPP Access Network; The second transferring module, being used for leaving the covering of described 3GPP Access Network or described 3GPP Access Network at described UE occurs when unusual, trigger the IP stream migration of described UE by non-3 GPP access network, the IP stream of described UE is all moved to described non-3 GPP access network from described 3GPP Access Network.
Preferably, described the second transferring module triggers the migration of the IP stream of described UE in such a way by non-3 GPP access network: send the IP stream migration to described non-3 GPP access network network element and trigger message, wherein, described IP stream migration triggers and carries all migration indications of IP stream in the message, notifies described 3GPP core network element that the IP stream of described UE is moved to described non-3 GPP access network from described 3GPP Access Network by described non-3 GPP access network network element.
Preferably, described IP stream migration triggers message and comprises one of following: the Internet secret key switch version 2IKEv2 message, RSVP RSVP message, session initiation protocol sip message, the proprietary bearing resource request message of non-3GPP.
Preferably, described non-3 GPP access network network element comprises: non-3 GPP access network gateway trusty, perhaps the packet data gateway ePDG of the evolution of fly-by-night non-3 GPP access network.
By the present invention, after UE is linked into the 3GPP core net by 3GPP Access Network and non-3 GPP access network simultaneously, when UE initiates the Internet protocol IP stream migration, trigger and carry out the migration of the IP stream of described UE by the 3GPP Access Network; Leaving the covering of 3GPP Access Network or 3GPP Access Network at UE occurs when unusual, UE can't be with the IP stream migration by 3GPP Access Network access time the non-3 GPP access network, then UE triggers the IP stream migration of UE by the non-3 GPP access network network, the IP stream of UE is moved to non-3 GPP access network from the 3GPP Access Network, thereby guarantee normally to move to non-3GPP network by the business of 3GPP Access Network access.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the EPS system of correlation technique;
Fig. 2 is the flow chart according to the IP stream migration method of the 3GPP enhancing of correlation technique;
Fig. 3 is the flow chart according to the triggering method of the stream migration of the embodiment of the invention;
Fig. 4 is the flow chart according to the triggering method of the stream migration of the embodiment of the invention one;
Fig. 5 is the flow chart according to the triggering method of the stream migration of the embodiment of the invention two;
Fig. 6 is the flow chart according to the triggering method of the stream migration of the embodiment of the invention three;
Fig. 7 is the schematic diagram according to the trigger equipment of the stream migration of the embodiment of the invention.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
In the correlation technique, UE adheres at 3GPP Access Network and non-3 GPP access network, and has set up one or more PDN connection, and realizes many bindings that PDN connects, when the IP stream migration occured, IP stream migration information was to network side by the 3GPP Internet Transmission.When UE leaves the covering of 3GPP Access Network or 3GPP Access Network abnormal or UE and 3GPP Access Network can't proper communication the time, can't be with the IP stream migration by the access of 3GPP Access Network to non-3GPP network, and then cause the stream migration failure.
According to the embodiment of the invention, a kind of triggering method of stream migration is provided, can when the 3GPP Access Network can't carry out stream migration, carry out the IP stream migration of UE by non-3 GPP access network.
Fig. 3 is the flow chart according to the triggering method of the stream migration of the embodiment of the invention, and as shown in Figure 3, the method can comprise following step (step S302-step S306):
Step S302, UE are linked into the 3GPP core net by 3GPP Access Network and non-3 GPP access network simultaneously;
Step S304 when UE initiates the IP stream migration, triggers and carries out the migration of the IP stream of UE by the 3GPP Access Network;
Step S306 leaves the covering of 3GPP Access Network or 3GPP Access Network at UE and occurs when unusual, and UE triggers the IP stream migration of UE by non-3 GPP access network, and the IP stream of UE is all moved to non-3 GPP access network from the 3GPP Access Network.
Pass through the embodiment of the invention, after UE is linked into the 3GPP core net by 3GPP Access Network and non-3 GPP access network simultaneously, when UE initiates the IP stream migration, carry out the migration of the IP stream of UE by the 3GPP Access Network, leaving the covering of 3GPP Access Network or 3GPP Access Network at UE occurs when unusual, UE is all moved to non-3 GPP access network with the IP stream of UE from the 3GPP Access Network by the IP stream migration of non-3 GPP access network network triggering UE.Thereby when the 3GPP Access Network can't move, guarantee normally to move to non-3GPP network by the business of 3GPP network insertion.
In a preferred implementation of the embodiment of the invention, when UE triggers the migration of IP stream of UE by non-3 GPP access network, can send the IP stream migration to the non-3 GPP access network network element and trigger message, wherein, the IP stream migration triggers and carries all migration indications of IP stream in the message, IP stream all migration indication can indicate all the IP streams in the network (being the 3GPP Access Network in this preferred implementation) that will move out all to move to the network (being non-GPP Access Network in this preferred implementation) of moving into, this indication also can replace by other information, reaches all purposes of migration of indication IP stream.After the non-3 GPP access network network element received the IP stream migration triggering message of UE transmission, notice 3GPP core network element was moved to non-3 GPP access network with the IP stream of UE from the 3GPP Access Network.
In another preferred implementation of the embodiment of the invention, the non-3 GPP access network network element can notify the 3GPP core net that the IP stream of UE is moved to non-3 GPP access network from the 3GPP Access Network in such a way: non-3 GPP access network sends IP stream migration message to the 3GPP core net, wherein, carry all migration indications of IP stream in this IP stream migration message, the 3GPP core net receives IP stream migration message, and whole migration indications are moved to non-3 GPP access network with the IP stream of UE from the 3GPP Access Network according to IP stream.Further, when the 3GPP core network element is moved to non-3 GPP access network with whole IP streams of UE from the 3GPP Access Network according to the whole migration indications of IP stream, the 3GPP core network element can be carried out resource corresponding to IP stream migration and set up/revise/the deletion processing, and the IP stream of UE is moved to non-3 GPP access network from the 3GPP Access Network.
In specific implementation process, the non-3 GPP access network network element can be non-3 GPP access network gateway trusty, the perhaps ePDG of fly-by-night non-3 GPP access network.The 3GPP core network element can be P-GW and/or PCRF.
Be in the situation of P-GW at the 3GPP core network element, when UE initiates the IP stream migration, the non-3 GPP access network network element (for example, non-3 GPP access network gateway trusty, the perhaps ePDG of fly-by-night non-3 GPP access network) can send IP stream migration message to PGW, after P-GW receives IP stream migration message, send IP-CAN session modification message to PCRF.PCRF carries out respective handling after receiving IP-CAN session modification message, and the IP of UE stream is all migrated to non-3 GPP access network.Perhaps, be in the situation of PCRF at the 3GPP core network element, when UE initiated the IP stream migration, the non-3 GPP access network network element directly sent IP stream migration message to PCRF, PCRF carries out respective handling after receiving IP stream migration message, and the IP of UE stream is all migrated to non-3 GPP access network.
In specific implementation process, agreement or the function of the non-3GPP network support of UE access are different, and it is different that the IP stream migration of employing triggers message, and namely according to different procotols or function, UE can trigger by different triggering message the IP stream migration of UE.In embodiments of the present invention, the IP stream migration triggers message and can include but not limited to one of following: IKEv2 message, RSVP (Resource Reservation Protocol, referred to as RSVP) message, session initiation protocol (Session Initiation Protocol is referred to as SIP) message, the proprietary bearing resource request message of non-3GPP.Be that UE can send the secret key switch version 2 in the Internet (Internet Key Exchange Version 2 is referred to as IKEv2) or RSVP or SIP or the proprietary message of other non-3GPP to the non-3 GPP access network network.
Non-3 GPP access network can send GTP message or PMIP message or PCC message to the 3GPP core net, and other similar message, and notice 3GPP core net is moved all IP from the 3GPP Access Network and flow to non-3 GPP access network.
Further, in IKEv2 or RSVP or SIP or GTP or PMIP or PCC message or the proprietary message of other non-3GPP, can carry all migration indications of IP stream.
Be described below by specific embodiment.Need to prove, following embodiment is not only applicable to E-UTRAN network and WLAN (the Wireless Local Area Networks of 3GPP network, referred to as WLAN)/fixed broadband network (fixed network) is as the multiple access scene of two kinds of Access Networks, and be applicable to the UTRAN network of network of 3GPP and WLAN/ fixed broadband network (fixed network) as the multiple access scene of two kinds of Access Networks.
Embodiment one
According to the embodiment of the invention, take non-3GPP network support S2a-PMIP as example, the scheme of the IP stream migration of the embodiment of the invention is described.
Fig. 4 is the flow chart according to the triggering method of the stream migration of the embodiment of the invention one, and as shown in Figure 4, the method can comprise following step (step S401-step S409):
Step S401, UE adheres at 3GPP Access Network and non-3 GPP access network, and has set up one or more PDN connection, and realizes many bindings that PDN connects.
Step S402, IP operation stream 1 and Business Stream 2 transmit by the 3GPP network.
Step S403, IP operation stream 3 and Business Stream 4 transmit by the 3GPP network.
Step S404, leave covering or the 3GPP network abnormal of 3GPP network as UE, when UE and 3GPP network can't proper communications, UE sends the IP stream migration to non-3 GPP access network trusty and triggers message, this message comprises: access style, all migration indications (all migration indications of IP stream).Wherein, access style represents the access network that IP stream will migrate into, and is optional information, because under this special scenes, the access network that IP stream will migrate into only has non-3 GPP access network.All migration indication representative all migrates into this access network with all the IP streams in the network that moves out, this indication also can replace by other information, to express the purpose of whole migrations, for example, adopt special packet filtering rule or special flow label values to represent.
Step S405, non-3 GPP access network sends agent binding update messages to P-GW, and this message comprises: access style (optional information) and all migration indications.If do not carry access style, it is that the IP of 3GPP network stream all is tied to non-3GPP network that non-3 GPP access network is given tacit consent to it.
Step S406, P-GW and PCRF carry out the operation of IP-CAN session modification.If do not carry access style, it is that the IP of 3GPP network stream all is tied to non-3GPP network that PCRF gives tacit consent to it.
Step S407-407 ', PCRF carry out gateway control with non-3 GPP access network and S-GW respectively and the QoS rule provides operation.In this step because PCRF can not perception 3GPP Network Abnormal, therefore, PCRF still can and S-GW between carry out gateway control and the QoS rule provides operation.
Step S408, P-GW sends proxy binding acknowledgment messages to non-3 GPP access network.
Step S409, non-3 GPP access network sends IP stream migration acknowledge message to UE.
The flow process of above-described embodiment is described for S2a-PMIP, is equally applicable to S2a-GTP, and difference is: the message between non-3GPP access trusty and the P-GW adopts the GTP related news to replace, and the related streams migration information transmits by GTP message.
Embodiment two
According to the embodiment of the invention, take non-3GPP network support PCC function as example, the scheme of the IP stream migration of the embodiment of the invention is described.
Fig. 5 is the flow chart according to the triggering method of the stream migration of the embodiment of the invention two, and as shown in Figure 5, the method can comprise following step (step S501-step S507):
Step S501, terminal UE is all adhered at 3GPP Access Network and non-3 GPP access network, and has set up one or more PDN connection, and realizes many bindings that PDN connects.
Step S502, IP operation stream 1 and Business Stream 2 transmit by the 3GPP network.
Step S503, IP operation stream 3 and Business Stream 4 transmit by the 3GPP network.
Step S504, leave covering or the 3GPP network abnormal of 3GPP network as UE, when UE and 3GPP network can't proper communications, UE sends the proprietary bearing resource request message of non-3GPP to non-3 GPP access network trusty, and this message comprises: access style (optional information) and all migration indications.
Step S505, non-3 GPP access network gives information to PCRF transmission gateway control and QoS rule, and this message comprises: access style (optional information) and all migration indications.If do not carry access style, it is that the IP of 3GPP network stream all is tied to non-3GPP network that non-3 GPP access network is given tacit consent to it.
Step S506 carries out in the TS23.402 6.6.1 trifle step 2-4 of specific resource request flow process.
Step S507, PCRF and S-GW carry out gateway control and the QoS rule provides operation.In this step because PCRF can not perception 3GPP Network Abnormal, therefore, PCRF still can and S-GW between carry out gateway control and the QoS rule provides operation.
Although above flow process is described for non-3GPP network trusty, also be applicable to fly-by-night non-3GPP network.
Embodiment three
According to the embodiment of the invention, take non-3GPP network support S2b function as example, the scheme of the IP stream migration of the embodiment of the invention is described.
Fig. 6 is the flow chart according to the triggering method of the stream migration of the embodiment of the invention three, and as shown in Figure 6, the method can comprise following step (step S601-step S610):
Step S601: terminal UE is all adhered at 3GPP Access Network and non-3 GPP access network, and has set up one or more PDN connection, and realizes many bindings that PDN connects.
Step S602:IP Business Stream 1 and Business Stream 2 transmit by the 3GPP network.
Step S603:IP Business Stream 3 and Business Stream 4 transmit by the 3GPP network.
Step S604: the covering or the 3GPP network abnormal that leave the 3GPP network as UE, when UE and 3GPP network can't proper communications, UE sends the IKEv2 request message to ePDG, this message comprises: access identifies (Access ID is referred to as AID) (optional comprising), all migration indications.Wherein, AID is associated with concrete access style.
After step S605:ePDG receives the IKEv2 request message that UE sends, obtain AID and whole migration indication informations from message, if do not comprise AID in this message, then the P-GW acquiescence is that IP stream with the 3GPP network all is tied to non-3GPP network.Then, ePDG sends the bearing resource command messages to P-GW, and this message comprises: AID (optional comprising), all migration indications.
Carry out the operation of IP-CAN session modification between step S606:P-GW and the PCRF.If do not comprise AID in this message, then P-GW acquiescence is that IP stream with the 3GPP network all is tied to non-3GPP network.
Between step S607-S610:P-GW and the ePDG, finish the establishment/modification of resource/renewal between UE and the ePDG.After relevant non-3GPP resource was set up, P-GW finished IP stream handover operation.
The flow process of above-described embodiment is described for S2b-GTP, is equally applicable to S2b-PMIP, and difference is: the message between ePDG and the P-GW adopts the PMIP related news to replace, and the related streams migration information transmits by PMIP message; Then, PCRF can directly and between the ePDG carry out the transmission of resource policy by gateway control session message.And the IKEv2 message between UE and the ePDG also can adopt the invite message of SIP or the resv message of RSVP to replace, and these message need to support to carry the entrained IP stream migration relevant information of IKEv2 message.
According to the embodiment of the invention, a kind of trigger equipment of stream migration also is provided, in order to the said method of realizing that the embodiment of the invention provides, when the 3GPP access network can't carry out stream migration, carry out the IP stream migration of UE by the non-3 GPP access network network.
Fig. 7 is the schematic diagram according to the trigger equipment of the stream migration of the embodiment of the invention, and as shown in Figure 7, this device mainly comprises: access module 10, the first transferring module 20 and the second transferring module 30.Wherein, access module 10 is used for being linked into the 3GPP core net by 3GPP Access Network and non-3 GPP access network simultaneously; The first transferring module 20 is coupled with access module 10, when being used for initiating the IP stream migration, triggers and carry out the migration of the IP stream of UE by the 3GPP Access Network; The second transferring module 30, be coupled with the first transferring module 20, be used for leaving the covering of 3GPP Access Network or 3GPP Access Network at UE and occur when unusual, trigger the IP stream migration of UE by non-3 GPP access network, the IP stream of UE is all moved to non-3 GPP access network from the 3GPP Access Network.
Pass through the embodiment of the invention, after the access module 10 of UE is linked into the 3GPP core net by 3GPP Access Network and non-3 GPP access network simultaneously, when the first transferring module 20 is initiated the IP stream migration, carry out the migration of the IP stream of UE by the 3GPP Access Network, leaving the covering of 3GPP Access Network or 3GPP Access Network at UE occurs when unusual, UE is by the IP stream migration of non-3 GPP access network network triggering UE, and the second transferring module 30 is all moved to non-3 GPP access network with the IP stream of UE from the 3GPP Access Network.Thereby when the 3GPP Access Network can't move, guarantee normally to move to non-3GPP network by the business of 3GPP network insertion.
In a preferred implementation of the embodiment of the invention, when the second transferring module 30 triggers the migration of IP stream of UE by the non-3 GPP access network network, can send the IP stream migration to non-3 GPP access network and trigger message, wherein, the IP stream migration triggers and carries all migration indications of IP stream in the message.The all migration indications of IP stream, indication all migrates into non-3 GPP access network with all the IP streams in the network (3GPP Access Network) that moves out, and this indication also can replace by other information, reaches all purposes of migration of indication IP example.After non-3GPP received the IP stream migration triggering message of UE transmission, notice 3GPP core net was moved to non-3 GPP access network with the IP stream of UE from the 3GPP Access Network.
In another preferred implementation of the embodiment of the invention, non-3 GPP access network can notify the 3GPP core net that the IP stream of UE is moved to non-3 GPP access network from described 3GPP Access Network in such a way: the non-3 GPP access network network element sends IP stream migration message to the 3GPP core net, wherein, carry all migration indications of IP stream in this IP stream migration message, the 3GPP core network element receives IP stream migration message, and whole migration indications are moved to non-3 GPP access network with the IP stream of UE from the 3GPP Access Network according to IP stream.
In specific implementation process, the IP stream migration that the second transferring module 30 sends triggers message and can include but not limited to one of following: IKEv2 message, RSVP message, sip message, bearing resource request message.Be that UE can send IKEv2 or RSVP or SIP or the proprietary message of other non-3GPP to the non-3 GPP access network network.The non-3 GPP access network network can send GTP message or PMIP message or PCC message to the 3GPP core net, and notice 3GPP core net is moved all IP from the 3GPP Access Network and flow to non-3 GPP access network.Further, in IKEv2 or RSVP or SIP or GTP or PMIP or PCC message or the proprietary message of other non-3GPP, can carry all migration indications of IP stream.
In specific implementation process, the non-3 GPP access network network element can be non-3 GPP access network gateway trusty, the perhaps ePDG of fly-by-night non-3 GPP access network.The 3GPP core network element can be P-GW or PCRF.
Be in the situation of P-GW at the 3GPP core network element, when UE initiates the IP stream migration, the non-3 GPP access network network element (for example, non-3 GPP access network gateway trusty, the perhaps ePDG of fly-by-night non-3 GPP access network) can send IP stream migration message to PGW, after P-GW receives IP stream migration message, send IP-CAN session modification message to PCRF.PCRF carries out respective handling after receiving IP-CAN session modification message, and the IP of UE stream is all migrated to non-3 GPP access network.Perhaps, be in the situation of PCRF at the 3GPP core network element, when UE initiated the IP stream migration, the non-3 GPP access network network element directly sent IP stream migration message to PCRF, PCRF carries out respective handling after receiving IP stream migration message, and the IP of UE stream is all migrated to non-3 GPP access network.
From above description, can find out, after the present invention has realized that following technique effect: UE is linked into the 3GPP core net by 3GPP Access Network and non-3 GPP access network simultaneously, when UE initiates the Internet protocol IP stream migration, trigger and carry out the migration of the IP stream of described UE by described 3GPP Access Network; Leaving the covering of 3GPP access network or 3GPP access network at UE occurs when unusual, UE can't will pass through the IP stream migration of 3GPP network insertion under the prerequisite of non-3 GPP access network network, then trigger the IP stream migration of UE by the non-3 GPP access network network, the IP stream of UE is moved to non-3 GPP access network from the 3GPP Access Network.Thereby when UE moves out 3GPP overlay area or 3GPP access network and unusually interrupts, guarantee normally to move to non-3GPP network by the business of 3GPP network insertion.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the triggering method of a stream migration is characterized in that, comprising:
User equipment (UE) is linked into the 3GPP core net by third generation partner program 3GPP Access Network and non-3 GPP access network simultaneously;
When described UE initiates the Internet protocol IP stream migration, trigger and carry out the migration of the IP stream of described UE by described 3GPP Access Network;
Leaving the covering of described 3GPP Access Network or described 3GPP Access Network at described UE occurs when unusual, described UE triggers the IP stream migration of described UE by described non-3 GPP access network, and the IP stream of described UE is all moved to described non-3 GPP access network from described 3GPP Access Network.
2. method according to claim 1 is characterized in that, described UE triggers the migration of the IP stream of described UE by described non-3 GPP access network, comprising:
Described UE sends the IP stream migration to described non-3 GPP access network network element and triggers message, and wherein, described IP stream migration triggers and carries all migration indications of IP stream in the message;
Described non-3 GPP access network network element notifies described 3GPP core network element that whole IP streams of described UE are moved to described non-3 GPP access network from described 3GPP Access Network.
3. method according to claim 2 is characterized in that, described non-3 GPP access network network element notifies described 3GPP core network element that whole IP streams of described UE are moved to described non-3 GPP access network from described 3GPP Access Network, comprising:
Described non-3 GPP access network network element sends IP stream migration message to described 3GPP core network element, wherein, carries all migration indications of described IP stream in the described IP stream migration message;
Described 3GPP core network element receives described IP stream migration message, and according to the whole migration indications of described IP stream whole IP streams of described UE is moved to non-3 GPP access network from the 3GPP Access Network.
4. method according to claim 3 is characterized in that, all moves indication according to described IP stream whole IP streams of described UE are moved to non-3 GPP access network from the 3GPP Access Network, comprising:
Described 3GPP core network element is carried out the related resource of IP stream migration and is set up/revise/the deletion processing, and the IP stream of described UE is moved to non-3 GPP access network from the 3GPP Access Network.
5. method according to claim 2, it is characterized in that described IP stream migration triggers message and comprises one of following: the Internet secret key switch version 2IKEv2 message, RSVP RSVP message, session initiation protocol sip message, the proprietary bearing resource request message of non-3GPP.
6. method according to claim 3 is characterized in that, it is one of following that described IP stream migration message comprises: general packet radio service tunnel agreement GTP message, proxy mobile internet protocol PMIP message, strategy and charging control PCC message.
7. method according to claim 2 is characterized in that, described non-3 GPP access network network element comprises: non-3 GPP access network gateway trusty, perhaps the packet data gateway ePDG of the evolution of fly-by-night non-3 GPP access network.
8. method according to claim 2 is characterized in that, described 3GPP core network element comprises: grouped data network gateway P-GW and/or "Policy and Charging Rules Function PCRF.
9. method according to claim 8, it is characterized in that, when described 3GPP core network element was P-GW, described non-3 GPP access network network element notified described 3GPP core network element that whole IP streams of described UE are moved to described non-3 GPP access network from described 3GPP Access Network, comprising:
Described non-3 GPP access network network element sends described IP stream migration message to described P-GW;
Described P-GW sends described IP-CAN session modification message to described PCRF.
10. method according to claim 8, it is characterized in that, when described 3GPP core network element was PCRF, described non-3 GPP access network network element notified described 3GPP core network element that whole IP streams of described UE are moved to described non-3 GPP access network from described 3GPP Access Network, comprising:
Described non-3 GPP access network network element sends described IP stream migration message to described PCRF.
11. the trigger equipment of a stream migration is characterized in that, comprising:
Access module is used for being linked into the 3GPP core net by third generation partner program 3GPP Access Network and non-3 GPP access network simultaneously;
The first transferring module when being used for initiating the Internet protocol IP stream migration, triggers and carries out the migration of the IP stream of described UE by described 3GPP Access Network;
The second transferring module, being used for leaving the covering of described 3GPP Access Network or described 3GPP Access Network at described UE occurs when unusual, trigger the IP stream migration of described UE by non-3 GPP access network, the IP stream of described UE is all moved to described non-3 GPP access network from described 3GPP Access Network.
12. device according to claim 11 is characterized in that, described the second transferring module triggers the migration of the IP stream of described UE in such a way by non-3 GPP access network:
Send the IP stream migration to described non-3 GPP access network network element and trigger message, wherein, described IP stream migration triggers and carries all migration indications of IP stream in the message, notifies described 3GPP core network element that the IP stream of described UE is moved to described non-3 GPP access network from described 3GPP Access Network by described non-3 GPP access network network element.
13. device according to claim 12, it is characterized in that described IP stream migration triggers message and comprises one of following: the Internet secret key switch version 2IKEv2 message, RSVP RSVP message, session initiation protocol sip message, the proprietary bearing resource request message of non-3GPP.
14. device according to claim 12 is characterized in that, described non-3 GPP access network network element comprises: non-3 GPP access network gateway trusty, perhaps the packet data gateway ePDG of the evolution of fly-by-night non-3 GPP access network.
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