CN101374339A

CN101374339A - Method and system for releasing source network resource during the process of switching evolvement network

Info

Publication number: CN101374339A
Application number: CNA200710147345XA
Authority: CN
Inventors: 朱文若; 帅扬来; 胡华东; 邓婷婷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-08-21
Filing date: 2007-08-21
Publication date: 2009-02-25
Anticipated expiration: 2027-08-21
Also published as: CN101374339B; CN102387558A; CN102387558B

Abstract

The invention discloses a method for releasing source network resource in the revolved network switching process, which includes the following steps: in or after the target network loading establishment, PCRF controls the release of the source network resource system synchronously or asynchronously; in the release process of the synchronous control source network resource of PCRF, the target network sends messages to PCRF, which needs to generate new PCC regulations for the target network, after the establishment of the target network loading, the target network sends messages to inform PCRF, and trigger PCRF to start the process of source network loading release; the target network loading establishment and the source network resource release process are carried asynchronously, that is, after the PCRF receives the IP access network communication establishment message send by the target network, the PCC determination providing message is send to the source network access gateway, the loading of the source network and related resource is needed to be released. Using the invention can carry out the release of source network loading resource in time, thereby improving the use efficiency of source network loading resource, and reducing the waste of resource.

Description

The method and system of releasing source network resource in a kind of evolvement network handoff procedure

Technical field

The present invention relates to the network handoff technique, the method and system of releasing source network resource in particularly a kind of evolvement network handoff procedure.

Background technology

In order to guarantee 3rd Generation Partnership Project (3GPP in following 10 years down to the time more of a specified duration, 3rd Generation Partnership Project) competitiveness of system, at the 3GPP organization internal, formulating the access technology of relevant evolution, particularly, need further to strengthen the intrasystem use group technology of 3GPP in order to strengthen the 3GPP system handles ability of the IP data service of growth fast.The network that comprises these evolution group technologys is called evolution grouping system (EPS, Evolved Packet System), most important several sections comprises in the technology of its evolution: reduce time delay, Gao Su user data rate more, the reduction of the whole cost of the power system capacity of enhancing and coverage and operator and EPS network configuration are for the backwards compatibility of existing network; In addition, the EPS network architecture also need to satisfy following some:

1. at the initial phase of subscriber equipment (UE, User Equipment), need in the network of evolution, set up basic IP and connect as accessing terminal to network;

2. the network architecture of evolution must minimize the time delay of user data;

3. the definition of each functional module should be avoided the overlapping or repetition of function in the evolution network framework, to avoid unnecessary signaling interaction and time delay.

Fig. 1 is the non-roaming configuration diagram of existing EPS network.Referring to Fig. 1, this network architecture mainly comprises Mobility Management Entity (MME, Mobility Management Entity), gateway (ServingGateway), packet data network gateway (PDN Gateway, Packet Data Network Gateway), UMTS Terrestrial radio access network (the E-UTRAN of evolution, Evolved UMTS Territorial RadioAccess Network) and "Policy and Charging Rules Function entity (PCRF, Policy and Charging RuleFunction), E-UTRAN links to each other by S1-MME interface with MME, MME links to each other by the S11 interface with ServingGateway, Serving Gateway links to each other by the S5 interface with PDN Gateway, and Serving Gateway and PDN Gateway link to each other with PCRF by the S7 interface.

Fig. 2 is the roaming configuration diagram of existing EPS network.Referring to Fig. 2, this EPS netsurfing framework is mainly based on disperseing strategy and charging enhancement function entity (PCEF, Policy and Charging EnforcementFunction) the strategy and the control (PCC that charges, Policy and Charging Control) framework, by visit public mobile network (VPLMN, Visited Public Land Mobile Network) and local public mobile network (HPLMN, Home PLMN) is divided into three parts, wherein, the main MME of the evolution block core net network of EPS network (EPC, Evolved Packet Core), three logic function modules of Serving Gateway and PDN Gateway.Wherein, MME is responsible for the mobile management of chain of command, comprise the management of user's context and mobile status, distributing user temporary identity sign, safety function etc., with current universal mobile telecommunications system (UMTS, Universal Mobile Telecommunications System) the control plane part of inner GPRS serving GPRS support node (SGSN, Serving General Packet Radio Service Support Node) is corresponding; Serving Gateway is the user's face anchor point between the different access systems in the 3GPP system, directly face the access of 3GPP connecting system, it is the user's face anchor point between the inner connecting system of 3GPP, under roaming scence, Serving Gateway also can be used as local user's face anchor point between non-3GPP connecting system and 3GPP connecting system, and a user can only have a ServingGateway in a period of time; PDN Gateway is the user's face anchor point between 3GPP connecting system and non-3 GPP system in the EPS system, and for the user provides PDN visit, different with Serving Gateway is that a user can have a plurality of PDN Gateway simultaneously.MME is connected with Serving Gateway by the S11 interface, and Serving Gateway is connected with PDN Gateway by the S8b interface, and Serving Gateway and PDNGateway form EPS gateway (EPS GW, EPS Gateway).

When 3GPP inserts, at local agent (HA, Home Agent) as the IAD (AGW, Access Gateway) of PDN GW and 3GPP as the PCEF logical functional entity is set on the Serving GW; When non3GPP inserts, at the AGW of HA and non-3GPP connecting system (non3GPP) such as the packet data gateway (ePDG of evolution, Evolved Packet Data Gateway) or on the AGW of reliable non-3 GPP connecting system the PCEF logical functional entity is set, promptly on four entities of the AGW of Serving GW, PDN GW, ePDG and reliable non-3 GPP, all is provided with the PCEF logical functional entity.

Shown in the dotted line among Fig. 1 and Fig. 2, the AGW of PCRF and Serving GW, PDN GW, ePDG and reliable non-3 GPP has by the S7 interface and is connected, the S2a interface is the interface that reliable non-3 GPP inserts EPS, mainly based on the proxy-mobile IP v6 (PMIPv6 of network-based, Proxy Mobility IP) and Foreign Agent (FA, Foreign Agent) pattern such as client mobile IP (CMIPv4 FA, CommonManagement IPv4 FA) the Internet engineering duty group (IETF, Internet Engineering TaskForce) agreement; The S2b interface is the interface that insincere non-3GPP inserts EPS, and EPC need provide gateway entity ePDG to guarantee the fail safe that insincere non-3GPP inserts, mainly based on the IETF agreement of network-based (PMIPv6); The S2c interface is trusted/untrusted/LTE/Legacy3GPP connecting system, based on host-based Collocated Care-of Address (COA, Care-of address) pattern (CMIPv6).

Along with the demand to terminal mobility is increasing, common IP technology can not have been supported moving of IP terminal, therefore, on the basis of common IP technology, produced mobile IP technology, make terminal when mobile, can not change its local address, when terminal moves to a non-local network, obtain a COA who belongs to current network, and with the local address (HOA of this COA and terminal, Home-of address) binds, when bag mails to the HOA of this terminal, the HA of terminal will mail to this Care-of Address to packet, thereby the route of finishing mainly comprises CMIP and PMIP technology, CMIP is based on the mobile IP technology of main frame, just needs terminal to participate in the binding procedure of mobile IP; PMIP is based on the mobile IP technology of network, does not need terminal to participate in the process of mobile IP, and the behavior of network meeting proxy terminal replaces terminal to initiate mobile IP binding.In Fig. 1, S2a interface, S2b interface and S2c interface mainly just are based on CMIP and PMIP.

In Fig. 1 and Fig. 2, the function of S7 interface is also not final to be determined, and how MME, Serving Gateway and PDN Gateway are combined in the corresponding entity and also determine.

WLAN (wireless local area network) (WLAN, Wireless Local Area Network) be a kind of wireless access system of extensive existence, in order to make the user can insert the 3GPP system more easily, to use the miscellaneous service in the 3GPP system, 3GPP has set up the interconnected (IWLAN of WLAN (wireless local area network), Interworking WLAN) project, the intercommunication problem of research WLAN and 3GPP system, thus make the user of 3GPP system to insert the 3GPP system by WLAN.

Fig. 3 is existing WLAN (wireless local area network) interconnected systems configuration diagram.Referring to Fig. 3, this system architecture comprises WLAN UE, WLAN access network (WLAN Access Network), Intranet/the Internet (Intranet/Internet) and 3GPP local network (3GPP Home Network), wherein, WLAN UE inserts WLAN Access Network by the Ww interface, carry out alternately with Intranet/Internet, WLAN Access Network links to each other with 3GPP Home Network by Wa and Wn interface, in 3GPP Home Network, to WLAN UE authenticate and, provide 3GPP business to WLAN UE.

It should be noted that, according to the up-to-date achievement in research of 3GPP, Fig. 3 framework is not only applicable to the connecting system of WLAN mode, and be applicable to World Interoperability for Microwave Access, WiMax (WiMAX, WorldInteroperability for Microwave Access) and ADSL (Asymmetric Digital Subscriber Line) any access waies such as (ADSL, AsymmetricDigital Subscriber Line) based on the IP technology.

Terminal is after entering network, leave the source network at present place if desired, enter in the process of another objective network, need carry out network switches, in the process of switching, in order to guarantee professional continuity, the carrying in the source network need switch to objective network, comprises objective network loading establishing process and source network carrying dispose procedure.After terminal was accomplished to the objective network switching, the source network carrying that needs to be in idle state discharged, to improve the utilance of resource.

Above-mentioned network switches the switching that comprises between the homogeneity network and the switching between the heterogeneous network, switching between the homogeneity network, as the switching between the 3GPP network, owing between the chain of command entity MME of two networks or the SGSN connection is arranged, after terminal switched to objective network, objective network MME or SGSN can carry out the release of resource by the MME or the SGSN of source network;

Switching for heterogeneous network, owing between the chain of command entity of two networks, do not have direct interface, one of release needs and two networks of the carrying of its source network all have interface, and, understand the objective network carrying and set up situation, can grasp the triggering entity on opportunity, thus entity notification source network releasing bearing.In agreement 3GPP consensus standard, provide between reliable non-3 GPP and the 3GPP, and between insincere non-3GPP and the 3GPP, based on the switching flow of different I ETF agreement.

Fig. 4 for existing S2a and S5 interface based under the non-roaming scene of PMIPv6 and the switching flow schematic diagram between the reliable non-3 GPP.Referring to Fig. 4, this flow process comprises:

Step 401, the UMTS Terrestrial radio access network of terminal and evolution (E-UTRAN, Evolved UMTSTerritorial Radio Access Network) Access Network connects, and terminal is carried out service data visitation by the connection of setting up;

In this step, be one section PMIPv6 tunnel between Serving GW and the PDN GW, have between PDN GW and the PCRF and be connected foundation, also may not connect foundation.

Step 402, terminal is found the reliable non-3 GPP Access Network, and selected this reliable non-3 GPP Access Network, prepares to switch;

Step 403, terminal are established to the connection of reliable non-3 GPP Access Network;

In this step, the process that connects is specified by the reliable non-3 GPP Access Network.

Step 404, on terminal, reliable non-3 GPP Access Network and AAA server (AAAServer, Authentication, Authorization and Accounting Server) carries out extended authentication agreement (EAP, Extensible Authentication Protocol) authentication process between;

In this step, in authentication process, AAA Server sends to the IP address of PDN GW the terminal mobile agent (PMA, Proxy Mobile Agent) of reliable non-3 GPP.

Step 405 after completing successfully the EAP authentication process, triggers attachment flow;

Step 406, the PMA of reliable non-3 GPP sends agent binding message (PBU, Proxy BindingUpdate) message to PDN GW;

Step 407, PDN GW creates or revises the banding cache inlet (BCE, BindingCache Entry) at this terminal, and, return IP address allocated to the PMA of reliable non-3 GPP;

Step 408 is set up the PMIP tunnel between reliable non-3 GPP and PDN GW;

Step 409 is finished the network attachment flow process.

In this step, terminal and PDN GW connect, and have the upstream and downstream data to send, and terminal recovers professional by the reliable non-3 GPP Access Network, carry out data and transmit.

As can be seen from Figure 4, in current switching flow, terminal from the source network successful switch behind objective network, the carrying of source network is in idle state always, does not consider timely source of release network carrying resource, therefore, current switching flow, after terminal switches to objective network, caused the waste of resource, reduced the service efficiency of resource.

Summary of the invention

In view of this, a main purpose of the embodiment of the invention is to provide the method for releasing source network resource in a kind of evolvement network handoff procedure, improves utilization rate of network resource.

Another purpose of the embodiment of the invention is to provide the system of releasing source network resource in a kind of evolvement network handoff procedure, improves the service efficiency of Internet resources.

For achieving the above object, the technical scheme of the embodiment of the invention specifically is achieved in that

The method of releasing source network resource in a kind of evolvement network handoff procedure, this method comprises:

When terminal when source network switches to objective network, after objective network is set up IP access network IP-CAN carrying, receive the IP-CAN session and set up to finish and receive the response;

"Policy and Charging Rules Function entity PCRF distributing policy and charging control PCC decision give information, carrying and related resource in the source of release network.

When terminal when source network switches to objective network, receive the IP-CAN session and set up Indication message, "Policy and Charging Rules Function entity PCRF distributing policy and charging control PCC decision give information, carrying and related resource in the source of release network.

The system of releasing source network resource in a kind of evolvement network handoff procedure, this system comprises: objective network IAD, PCRF, network anchor point and source network IAD, wherein,

The objective network IAD, be used for after terminal and network connect, send the IP-CAN session to PCRF and set up Indication message, receiving IP-CAN session foundation receives the response, set up the PCC Rule Information of receiveing the response and carrying according to the IP-CAN session that receives, initiate the IP-CAN carrying of objective network and set up, transmission IP-CAN session is set up to finish and is receiveed the response to PCRF;

PCRF, Indication message is set up in the IP-CAN session that is used for the output of receiving target network access gateway, generate corresponding PCC Rule Information, being carried at the IP-CAN session sets up and to receive the response, be sent to the objective network IAD, the IP-CAN session that the receiving target network access gateway sends is set up to finish and is receiveed the response, and issues PCC and determines to give information network anchor point, carry and require the corresponding PCC Rule Information of network anchor point deletion, the PCC decision that receives the network anchor point transmission provides receives the response;

Network anchor point comprises the PCEF that source network is used for strategy and charges and control, and the PCC decision that reception PCRF issues gives information, and triggers PCEF and sends resource release message to the source network IAD, and PCC determines to provide to receive the response to the PCRF transmission;

The source network IAD is connected with network anchor point based on GPRS Tunnel Protocol, receives the resource release message that network anchor point is sent, the carrying and the related resource of correspondence in the source of release network.

PCRF, be used for issuing charging regulation to network anchor point, Indication message is set up in the IP-CAN session of receiving target network access gateway output, produce corresponding PCC Rule Information, being carried at the IP-CAN session sets up and to receive the response, be sent to the objective network IAD, the IP-CAN session that the receiving target network access gateway sends is set up to finish and is receiveed the response, issue PCC and determine to give information the source network IAD, require the corresponding PCC rule of source network IAD deletion, the PCC decision that the reception sources network access gateway sends provides receives the response;

Network anchor point comprises PCEF, the resource release message that the reception sources network access gateway sends, and the related resource of source of release network receives the charging regulation that PCRF issues, and charges;

The source network IAD, be connected with network anchor point based on mobile IP protocol, comprise the PCEF that source network carries out IP-CAN carrying control, the PCC decision that reception PCRF issues gives information, trigger corresponding carrying and related resource in the PCEF source of release network, send PCC to PCRF and determine to provide to receive the response, send resource release message to network anchor point.

As seen from the above technical solution, the method and system of releasing source network resource in a kind of evolvement network handoff procedure of the embodiment of the invention, by in the objective network carrying is set up or after setting up, PCRF is by the release of synchronous or asynchronous Controlling Source Internet resources, in the dispose procedure of the Synchronization Control source network resource of PCRF, network anchor point or objective network IAD transmit a request to PCRF, require to generate new PCCRule to Target AGW, after Target AGW finishes objective network carrying foundation, send message informing PCRF, trigger PCRF and initiate the process that the source network carrying discharges; Asynchronous process of carrying out objective network carrying foundation and the release of source network resource, be IP access to network conversation (the IP-CAN Session that PCRF receives Target AGW or network anchor point transmission, IP Connectivity Access Network Session) set up message after, send PCC and determine to give information Source AGW, require the carrying and the related resource of source of release network, can trigger the asynchronous control carrying of PCRF by Target AGW or Network Anchor and discharge flow process, can be based on the switching of 3GPP to non-3GPP network, also can be based on the switching of non-3GPP to the 3GPP network, make terminal after source network switching target network, can in time carry out the release of source network bearing resource, improve the service efficiency of source network bearing resource, reduced the waste of resource.

Description of drawings

Fig. 1 is the non-roaming configuration diagram of existing EPS network;

Fig. 2 is the roaming configuration diagram of existing EPS network;

Fig. 3 is existing WLAN (wireless local area network) interconnected systems configuration diagram;

Fig. 4 for existing S2a and S5 interface based under the non-roaming scene of PMIPv6 and the switching flow schematic diagram between the reliable non-3 GPP;

Fig. 5 is the system configuration schematic diagram of releasing source network resource in the embodiment of the invention evolvement network handoff procedure;

Fig. 6 is another system configuration schematic diagram of releasing source network resource in the embodiment of the invention evolvement network handoff procedure;

Fig. 7 is that the carrying of embodiment of the invention PCRF Synchronization Control discharges schematic flow sheet;

Fig. 8 is the carrying release schematic flow sheet that embodiment of the invention Target AGW triggers the asynchronous control of PCRF;

Fig. 9 is the carrying release schematic flow sheet that embodiment of the invention target Network Anchor triggers the asynchronous control of PCRF;

Figure 10 is that the 3GPP of the embodiment of the invention one PCRF Synchronization Control carries the schematic flow sheet of setting up and discharging in non-3GPP network switching process;

Figure 11 is that the 3GPP of the asynchronous control of PCRF of the embodiment of the invention two non-3GPP AGW triggerings carries the schematic flow sheet of setting up and discharging in non-3GPP network switching process;

Figure 12 is that the 3GPP of the asynchronous control of PCRF of the embodiment of the invention three non-3GPP Network Anchor triggerings carries the schematic flow sheet of setting up and discharging in non-3GPP network switching process;

The schematic flow sheet that the 3GPP of Figure 13 PCRF Synchronization Control that to be the embodiment of the invention four non-3GPP trigger based on PMIPv6 carrying in the non-3GPP network switching process is set up and discharged;

Figure 14 is that the embodiment of the invention five non-3GPP are based on the switching of PMIPv6 to the 3GPP network, by the schematic flow sheet of non-3GPP network carrying foundation of the asynchronous control of PCRF of 3GPPAGW triggering and release;

Figure 15 is that the embodiment of the invention six non-3GPP are based on the switching of PMIPv6 to the 3GPP network, by the schematic flow sheet of non-3GPP network carrying foundation of the asynchronous control of PCRF of Network Anchor triggering and release;

Figure 16 is the switching that the embodiment of the invention seven non-3GPP arrive the 3GPP network based on the CMIPv4FA pattern, the schematic flow sheet that the non-3GPP network carrying of PCRF Synchronization Control is set up and discharged;

Figure 17 is that the embodiment of the invention eight non-3GPP are based on the switching of CMIPv4FA pattern to the 3GPP network, by the schematic flow sheet of non-3GPP network carrying foundation of the asynchronous control of PCRF of 3GPP AGW triggering and release;

Figure 18 is that the embodiment of the invention nine non-3GPP are based on the switching of CMIPv4FA pattern to the 3GPP network, by the schematic flow sheet of non-3GPP network carrying foundation of the PCRF Synchronization Control of 3GPP Network Anchor triggering and release.

Embodiment

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

The embodiment of the invention passes through in the objective network carrying is set up or after setting up, PCRF makes terminal after source network switching target network by the release of synchronous or asynchronous Controlling Source Internet resources, can in time carry out the release of source network bearing resource.

To achieve these goals, the embodiment of the invention has proposed the system of releasing source network resource in a kind of evolvement network handoff procedure.

Fig. 5 is the system configuration schematic diagram of releasing source network resource in the embodiment of the invention evolvement network handoff procedure.Referring to Fig. 5, this system comprises: target AGW (Target AGW) 51, PCRF52, network anchor point (Network Anchor) 53 and source AGW (Source AGW) 54, wherein,

Target AGW51 is used for after terminal and network connect, and the PCEF on it sends IP-CAN Session to PCRF52 and sets up Indication message; Receiving IP-CAN Session foundation receives the response, set up the PCC Rule information of receiveing the response and carrying according to the IP-CAN Session that receives, the IP-CAN Bearer that initiates objective network sets up, and transmission IP-CAN Session sets up to finish receives the response to PCRF52;

PCRF52, the IP-CAN Session that is used to receive Target AGW51 output sets up Indication message, produce corresponding PCC Rule information, is carried at IP-CAN Session and sets up and receive the response, and is sent to Target AGW51; The IP-CAN Session that receives Target AGW51 transmission sets up to finish receives the response, and issues PCC and determines to give information Network Anchor53, requires the corresponding PCC Rule of NetworkAnchor53 deletion; The PCC decision that receives Network Anchor53 transmission provides receives the response, and knows that Anchor53 has deleted corresponding PCC Rule;

Network Anchor53, the logical functional entity PCEF that comprises source network, be used for strategy and the control of chargeing, the PCC decision that reception PCRF52 issues gives information, trigger the PCEF logical functional entity and send resource release message, send PCC to PCRF52 and determine to provide to receive the response to Source AGW54;

Source AGW54, (GTP, GPRS Tunneling Protocol) is connected with Network Anchor53 based on GPRS Tunnel Protocol, receives the resource release message that Network Anchor53 sends, the carrying and the related resource of correspondence in the source of release network.

The flow process of Fig. 5 comprises two kinds of interactive modes, synchronous interaction mode and asynchronous interactive mode, the synchronous interaction mode can be described below: after terminal and network connect, PCEF on the Target AGW51 sends IP-CAN Session to PCRF52 and sets up Indication message, PCRF52 receives IP-CAN Session and sets up Indication message, produce corresponding PCC Rule information, being carried at IP-CAN Session sets up and to receive the response, be sent to Target AGW51, Target AGW51 receives IP-CAN Session foundation and receives the response, set up the PCC Rule information of receiveing the response and carrying according to the IP-CAN Session that receives, the IP-CAN Bearer that initiates objective network sets up, after the foundation, transmission IP-CAN Session sets up to finish receives the response to PCRF52, PCRF52 reception IP-CAN Session sets up to finish receives the response, issue PCC and determine to give information Network Anchor53, require the corresponding PCC Rule of Network Anchor53 deletion, the PCC decision that Network Anchor53 reception PCRF52 issues gives information, trigger the PCEF logical functional entity and send resource release message to Source AGW54, SourceAGW54 receives the resource release message that NetworkAnchor53 sends, in the source of release network after the corresponding carrying and related resource, send feedback message to Network Anchor53, the corresponding PCC Rule of Network Anchor53 deletion, sending PCC to PCRF52 determines to provide to receive the response, PCRF52 receives PCC and determines to provide to receive the response, and knows that Anchor53 has deleted corresponding PCC Rule.

The asynchronous interactive mode is described below, PCEF on the Target AGW51 sends IP-CAN Session to PCRF52 and sets up Indication message, PCRF52 receives IP-CAN Session and sets up Indication message, produce corresponding PCC Rule information, being carried at IP-CAN Session sets up and to receive the response, be sent to Target AGW51, Target AGW51 receives IP-CAN Session foundation and receives the response, set up the PCC Rule information of receiveing the response and carrying according to the IP-CAN Session that receives, the IP-CAN Bearer that initiates objective network sets up, after the foundation, transmission IP-CAN Session sets up to finish receives the response to PCRF52; When PCRF52 reception IP-CAN Session sets up Indication message, PCRF52 issues the PCC decision to Network Anchor53 and gives information, require the corresponding PCC Rule of Network Anchor53 deletion, Network Anchor53 receives the PCC decision and gives information, initiate source network and discharge flow process with the source of release network carrying and related resource, and the corresponding PCC Rule of deletion, after finishing resource release, sending PCC to PCRF52 determines to provide to receive the response, PCRF52 receives PCC and determines to provide to receive the response, and knows that Network Anchor53 has deleted corresponding PCC Rule.

In the practical application, Source AGW54 also can be connected with Network Anchor53 based on other agreement, and Network Anchor can be PDN Gateway, also can be HA.

Fig. 6 is another system configuration schematic diagram of releasing source network resource in the embodiment of the invention evolvement network handoff procedure.Referring to Fig. 6, this system comprises: Target AGW61, PCRF62, NetworkAnchor63 and Source AGW64, wherein,

Target AGW61 is used for after terminal and network connect, and the PCEF on it sends IP-CAN Session to PCRF62 and sets up Indication message; Receiving IP-CAN Session foundation receives the response, set up the PCC Rule information of receiveing the response and carrying according to the IP-CAN Session that receives, the IP-CAN Bearer that initiates objective network sets up, and transmission IP-CAN Session sets up to finish receives the response to PCRF62;

PCRF62, be used for issuing charging regulation to Network Anchor63, the IP-CAN Session that receives Target AGW61 output sets up Indication message, produces corresponding PCC Rule information, be carried at IP-CAN Session and set up and to receive the response, be sent to Target AGW61; The IP-CAN Session that receives Target AGW61 transmission sets up to finish receives the response, and issues PCC and determines to give information SourceAGW64, requires the corresponding PCC Rule of Source AGW64 deletion; The PCC decision that receives Source AGW64 transmission provides receives the response, and knows that Source AGW64 has deleted corresponding PCCRule;

Network Anchor63 comprises the PCEF logical functional entity, receives the resource release message that Source AGW64 sends, and the related resource of source of release network receives the charging regulation that PCRF62 issues, and charges;

Source AGW64, be connected with Network Anchor63 based on MIP, comprise the PCEF logical functional entity (not shown) that source network carries out IP-CAN carrying control, the PCC decision that reception PCRF62 issues gives information, trigger the PCEF logical functional entity, the carrying and the related resource of correspondence in the source of release network send PCC to PCRF62 and determine to provide to receive the response, and send resource release message to NetworkAnchor63.

The flow process of Fig. 6 comprises two kinds of interactive modes, synchronous interaction mode and asynchronous interactive mode, the synchronous interaction mode can be described below: after terminal and network connect, PCRF62 issues charging regulation to NetworkAnchor63, Source AGW64 receives the charging regulation that PCRF62 issues, charge, PCEF on the Target AGW61 sends IP-CAN Session to PCRF62 and sets up Indication message, PCRF62 receives IP-CAN Session and sets up Indication message, produce corresponding PCC Rule information, being carried at IP-CAN Session sets up and to receive the response, be sent to Target AGW61, TargetAGW61 receives IP-CAN Session foundation and receives the response, set up the PCC Rule information of receiveing the response and carrying according to the IP-CAN Session that receives, the IP-CAN Bearer that initiates objective network sets up, after the foundation, transmission IP-CAN Session sets up to finish receives the response to PCRF62, PCRF62 reception IP-CAN Session sets up to finish receives the response, issue PCC and determine to give information SourceAGW64, require the corresponding PCC Rule of Source AGW64 deletion, the PCC decision that Source AGW64 reception PCRF62 issues gives information, trigger source network by the PCEF logical functional entity and discharge flow process with the source of release network carrying and related resource, and the corresponding PCC Rule of deletion, after finishing resource release, sending PCC to PCRF62 determines to provide to receive the response, PCRF62 receives PCC and determines to provide to receive the response, and knows that Source AGW64 has deleted corresponding PCC Rule.

The asynchronous interactive mode is described below: the PCEF on the Target AGW61 sends IP-CAN Session to PCRF62 and sets up Indication message, PCRF62 receives IP-CAN Session and sets up Indication message, PCRF62 receives IP-CAN Session and sets up Indication message, produce corresponding PCC Rule information, being carried at IP-CAN Session sets up and to receive the response, be sent to Target AGW61, TargetAGW61 receives IP-CAN Session foundation and receives the response, set up the PCC Rule information of receiveing the response and carrying according to the IP-CAN Session that receives, the IP-CAN Bearer that initiates objective network sets up, after the foundation, transmission IP-CAN Session sets up to finish receives the response to PCRF52; When PCRF52 reception IP-CAN Session sets up Indication message, PCRF52 issues the PCC decision to Source AGW64 and gives information, require the corresponding PCC Rule of Source AGW64 deletion, Source AGW64 receives the PCC decision and gives information, initiate source network and discharge flow process with the source of release network carrying and related resource, and the corresponding PCC Rule of deletion, after finishing resource release, sending PCC to PCRF62 determines to provide to receive the response, PCRF62 receives PCC and determines to provide to receive the response, and knows that Source AGW64 has deleted corresponding PCC Rule.

In the practical application, Source AGW64 also can be connected with Network Anchor63 based on other agreement.

Based on Fig. 5 and Fig. 6, the embodiment of the invention comprises two cover technical schemes.

The first cover technical scheme: the carrying dispose procedure of the loading establishing process of objective network and source network is synchronous process.Be PCRF receive IP-CAN Session that objective network sends set up finish receive the response after, just send the PCC decision Source AGW that gives information, require to discharge and carry accordingly and relevant resource.

Fig. 7 is that the carrying of embodiment of the invention PCRF Synchronization Control discharges schematic flow sheet.Referring to Fig. 7, this flow process comprises:

Step 701, terminal and source network connect;

In this step, after terminal and source network connect, carry out the transmission of up-downgoing data by source network.

Step 702, terminal is found objective network and is inserted objective network;

Step 703, terminal connects by the Network Anchor of Target AGW and objective network;

Step 704, Target AGW sends IP-CAN Session and sets up Indication message to PCRF, the PCC Rule that look for novelty;

In this step, IP-CAN Session sets up Indication message and comprises user ID (User ID), wireless access type (RAT Type, Radio Access Technology Type), network anchor point IP address (Network Anchor IP Address), remote ip address (Remote IP Address) and Operational Visit point domain name parameter informations such as (APN, Access Point Name).Wherein, Network AnchorIP Address is an optional parameters, initiates if the IP-CAN Session between Network Anchor and the PCRF sets up by Network Anchor, and IP-CAN Session sets up and do not comprise this parameter in the Indication message; If it is to be initiated by PCRF that the IP-CAN Session between Network Anchor and the PCRF sets up, then comprise this parameter in the message.Remote IP Address is to be the end IP address, source of the access service that distributes of user by Network Anchor, for instance, if insert based on GTP, then source end IP address is PDP Address, if insert based on MIP, then source end IP address is HomeAddress.

Step 705, PCRF receives IP-CAN Session and sets up Indication message, and related new IP-CANSession and business information produce corresponding PCC Rule information, is carried at IP-CAN Session and sets up and receive the response, and sends to the PCEF on the Target AGW;

Step 706, the PCEF on the Target AGW sets up the PCC Rule information of receiveing the response and carrying according to the IP-CAN Session that PCRF issues, and initiates to set up flow process with the IP-CAN Bearer of terminal;

Step 707, after objective network was finished IP-CAN Bearer foundation, Target AGW sent IP-CAN Session foundation and finishes the PCRF of receiveing the response, and notice PCRF objective network is finished corresponding foundation of carrying;

In this step, after PCRF reception IP-CAN Session foundation is finished and is receiveed the response, based on MIP or GTP technology between SourceAGW and the Network Anchor, thereby, the flow process of the bearing resource of its source of release network is also respectively different, if between Source AGW and the Network Anchor based on MIP, execution in step 708a～710a, otherwise, execution in step 708b～710b.

Step 708a, PCRF issues PCC and determines to give information Source AGW after confirming that objective network is finished corresponding carrying foundation, requires the corresponding PCCRule of PCEF deletion on the Source AGW;

Step 709a, Source AGW initiates the release flow process of carrying and related resource, the carrying and the related resource of correspondence in the source of release network;

In this step, if terminal has dual radio ability, then terminal participates in the carrying of source network and the release flow process of related resource are dotted among the figure.

Step 710a, after finishing carrying and resource and discharging, Source AGW sends the PCC decision and provides and receives the response to PCRF, notifies its corresponding PCC Rule to delete and finishes.

Step 708b, PCRF issues PCC and determines to give information Network Anchor after confirming that objective network is finished corresponding carrying foundation, requires the corresponding PCC Rule of PCEF deletion on the Network Anchor;

Step 709b, Network Anchor initiates the release flow process of carrying and related resource, the carrying and the related resource of correspondence in the source of release network;

In this step, receive (dual radio) ability if terminal has double-direction radio, then terminal participates in the carrying of source network and the release flow process of related resource are dotted among the figure.

Step 710b, after finishing carrying and resource and discharging, Network Anchor sends the PCC decision and provides and receives the response to PCRF, notifies its corresponding PCC Rule to delete and finishes.

The process of setting up for the objective network carrying, also can initiate by Network Anchor, to comprise corresponding parameters User ID, APN, RAT Type, the IP-CAN Session of information such as Target AGW IP Address and RemoteIP Address sets up Indication message and sends to PCRF, and PCRF generates corresponding PCC Rule then and issues (PUSH) to Target AGW, the carrying of setting up objective network.After finishing carrying foundation, Target AGW sends again receives the response to PCRF, and notice PCRF carrying is set up and finished, and the carrying that PCRF is initiated to source network again discharges flow process.In this process, Target AGWIP Address is an optional parameters.

The second cover technical scheme: the carrying dispose procedure of the loading establishing process of objective network and source network is asynchronous process of carrying out.Be PCRF after receiving that IP-CAN Session that Target AGW sends sets up Indication message, PCRF just can send the PCC decision Source AGW that gives information, and requires to discharge and carries accordingly and relevant resource.

Different according to the entity that triggers PCRF initiation release flow process, comprise dual mode:

1, Target AGW triggers the carrying release of the asynchronous control of PCRF

Fig. 8 is the carrying release schematic flow sheet that embodiment of the invention Target AGW triggers the asynchronous control of PCRF.Referring to Fig. 8, this flow process comprises:

Step 801～step 804 with step 701～step 704, does not repeat them here;

Step 805, PCRF receives IP-CAN Session and sets up Indication message, and related new IP-CANSession and business information produce corresponding PCC Rule, is carried at IP-CAN Session and sets up and receive the response, and sends to the PCEF on the Target AGW;

In this step, after PCRF reception IP-CAN Session sets up Indication message, according between SourceAGW and the Network Anchor based on MIP or GTP technology, if between Source AGW and the Network Anchor based on MIP, execution in step 806a～808a, otherwise, execution in step 806b～808b.

Step 806a, PCRF receives IP-CAN Session and sets up Indication message, issues PCC and determines to give information Source AGW, requires the corresponding PCC Rule of PCEF deletion of Source AGW;

Step 807a, Source AGW initiates the release flow process of carrying and related resource, the carrying and the related resource of correspondence in the source of release network;

Step 808a, after finishing carrying and resource and discharging, Source AGW sends the PCC decision and provides and receives the response to PCRF, and the corresponding PCC Rule of notice deletes and finishes.

Step 806b, PCRF receives IP-CAN Session and sets up Indication message, issues PCC and determines to give information Network Anchor, requires the corresponding PCC Rule of PCEF deletion on the Network Anchor;

Step 807b, Network Anchor initiates the release flow process of carrying and related resource, the carrying and the related resource of correspondence in the source of release network;

Step 808b, after finishing carrying and resource and discharging, Network Anchor sends the PCC decision and provides and receives the response to PCRF, and the corresponding PCC Rule of notice deletes and finishes.

In the practical application, step 805 and step 806a and step 805 and the not strict sequential relationship of step 806b, step 806a and step 806b also can carry out in step 804 back.

2, target Network Anchor triggers the asynchronous control carrying of PCRF release

Fig. 9 is the carrying release schematic flow sheet that embodiment of the invention target Network Anchor triggers the asynchronous control of PCRF.Referring to Fig. 9, this flow process comprises:

Step 901～step 903 with step 801～step 803, does not repeat them here;

Step 904, target Network Anchor sends IP-CAN Session and sets up Indication message to PCRF, the PCC Rule that look for novelty;

In this step, IP-CAN Session sets up Indication message and comprises User ID, APN, RAT Type, Target AGW IP Address and Remote IP Address) etc. parameter information.Wherein, TargetAGW IP Address is an optional parameters, initiates if the IP-CANSession between Target AGW and the PCRF sets up by Target AGW, and IP-CAN Session sets up and do not comprise this parameter in the Indication message; If the IP-CAN Session between Target AGW and the PCRF sets up by PCRF and initiates, then comprise this parameter in the message.Remote IP Address is to be the end IP address, source of the access service that distributes of user by Network Anchor, for instance, if insert based on GTP, then source end IP address is PDP Address, if insert based on MIP, then source end IP address is Home Address.

Step 905, PCRF receives IP-CAN Session and sets up Indication message, and related new IP-CANSession and business information produce corresponding Charging Rule, be carried at IP-CAN Session and set up and to receive the response, send to the PCEF on the target Network Anchor;

Step 906, PCRF receives IP-CAN Session and sets up Indication message, generate corresponding PCC Rule according to the information of obtaining, giving information by the PCC decision sends to Target AGW, and TargetAGW initiates the objective network carrying according to the PCC Rule that receives and sets up flow process;

In this step, after PCRF reception IP-CAN Session sets up Indication message, according between SourceAGW and the Network Anchor based on MIP or GTP technology, if between Source AGW and the Network Anchor based on MIP, execution in step 907a～909a, otherwise, execution in step 907b～909b.

Step 907a～909a is with step 806a～808a.

Step 907b～909b is with step 806b～808b.

In the practical application, the sequential relationship that step 905, step 906 and step 907a and step 907b are not strict, step 907a and step 907b also can carry out in step 904 back.

In short, for the first cover technical scheme, be that the loading establishing process of objective network and the carrying dispose procedure of source network are synchronous processes,, produce the method for two kinds of source of release network carrying resources based on being MIP technology or GTP technology between Source AGW and the Network Anchor; For the second cover technical scheme, be that the loading establishing process of objective network and the carrying dispose procedure of source network are asynchronous processes, based on being the carrying release that Target AGW or Network Anchor trigger PCRF Controlling Source network, every kind of trigger mode can produce the method for two kinds of source of release network carrying resources according to being MIP technology or GTP technology between Source AGW and the Network Anchor again.

Based on Fig. 5～Fig. 9,, be elaborated to using the specific embodiment of the present invention in the system of releasing source network resource in the evolvement network handoff procedure below for nine embodiment.

In the embodiment of the invention, non-3GPP AGW can be the IAD entity of insincere non-3GPP ePDG or reliable non-3 GPP, the ASN GW in inserting as WiMAX; And, in the Synchronization Control process of PCRF, objective network sends IP-CAN Session by Network Anchor and sets up Indication message to PCRF, require to generate new PCC Rule, be issued to Target AGW, after Target AGW finishes objective network carrying foundation, send IP-CAN Session foundation and finishing the notice PCRF of receiveing the response, trigger the process of PCRF initiation source network carrying release.

Following embodiment one～embodiment three is based on the switching of 3GPP to non-3GPP network.

Embodiment one:

Figure 10 is that the 3GPP of the embodiment of the invention one PCRF Synchronization Control carries the schematic flow sheet of setting up and discharging in non-3GPP network switching process.Referring to Figure 10, the 3GPP network can insert based on GTP or MIP, and this flow process comprises:

Step 1001, terminal and 3GPP network connect;

In this step, after terminal and 3GPP network connect, between terminal and Network Anchor, transmit up-downgoing Packet Data Unit (PDU, Packet Data Unit) by the 3GPP network.

Step 1002, terminal are found non-3GPP network and are inserted non-3GPP network;

Step 1003, terminal and non-3GPP network access gateway (Non-3GPP AGW) connect and are established to MIP tunnel between the Network Anchor;

In this step, after terminal and Non-3GPP AGW and Network Anchor connected, Non-3GPP AGW can obtain information such as the home address (Home Address) of terminal and NetworkAnchor IP Address.

Step 1004, Non-3GPP AGW sends IP-CAN Session and sets up Indication message to PCRF, obtains corresponding PCC Rule;

In this step, IP-CAN Session sets up Indication message and comprises parameter informations such as User-ID, Home Address, HA Address, APN and RAT Type.Wherein, RAT Type is used to identify the type of current access network; HA Address is an optional parameters, initiates if the IP-CAN Session between Network Anchor and the PCRF sets up by Network Anchor, and IP-CAN Session sets up and do not comprise this parameter in the Indication message; If the IP-CANSession between Network Anchor and the PCRF sets up by PCRF and initiates, then comprise this parameter in the message.

Step 1005, PCRF sets up Indication message according to the IP-CAN Session that receives, generates corresponding PCC Rule, is carried at IP-CAN Session and sets up and to receive the response, and is handed down to Non-3GPPAGW;

Step 1006, Non-3GPP AGW sets up IP-CAN Bearer corresponding in the non-3GPP network according to the PCC Rule that receives;

Step 1007, after IP-CAN Bearer set up in finishing non-3GPP network, Non-3GPPAGW transmission IP-CAN Session sets up to finish receiveed the response to PCRF, and the IP-CAN Bearer of notice PCRF correspondence sets up and finishes;

In the practical application, after PCRF reception IP-CAN Session sets up Indication message, according between SourceAGW and the Network Anchor based on MIP or GTP technology, if between Source AGW and the Network Anchor based on MIP, execution in step 1008a～1012a, otherwise, execution in step 1008b～1010b.

Step 1008a, PCRF send the PCC decision and give information to 3GPP AGW after determining that corresponding carrying foundation is finished in the non-3GPP network, require the corresponding PCCRule of PCEF deletion on the 3GPP AGW;

Step 1009a, 3GPP AGW send agent binding update messages to Network Anchor, based on corresponding agent binding on Care-of Address (COA) the deletion Network Anchor;

In this step, agent binding update messages comprises User-ID and life cycle (lifetime) parameter, and wherein, the value of lifetime is set to 0.

Step 1010a, Network Anchor return the agent binding 3GPP AGW of receiveing the response;

In this step, if there is not the agent binding of this corresponding COA among the Network Anchor, Network Anchor is changed to 133 with the treatment state of agent binding update messages in agent binding is receiveed the response, notice 3GPP AGW represents that promptly Network Anchor is not this user's HA.

Step 1011a, 3GPP AGW discharge the IP-CAN Bearer in the 3GPP network according to the PCC Rule that will delete;

In this step, if terminal has dual radio ability, then terminal participates in the carrying of 3GPP network and the release flow process of related resource are dotted among the figure.

Step 1012a, after finishing 3GPP network IP-CAN Bearer and discharging, 3GPP AGW sends PCC Rule and provides and receives the response to PCRF, and the PCC Rule deletion of notice PCRF correspondence is finished.

Step 1008b, PCRF send the PCC decision and give information to Network Anchor after determining that corresponding carrying foundation is finished in the non-3GPP network, require the corresponding PCC Rule of PCEF deletion on the Network Anchor;

Step 1009b, Network Anchor discharge the IP-CAN Bearer in the 3GPP network according to the PCC Rule that will delete;

Step 1010b, after finishing 3GPP network IP-CAN Bearer and discharging, Network Anchor sends PCC Rule and provides and receives the response to PCRF, and the PCC Rule deletion of notice PCRF correspondence is finished.

Embodiment two:

Among the embodiment one, the carrying dispose procedure of the loading establishing process of objective network and source network is synchronous process, and in the practical application, the carrying dispose procedure of the loading establishing process of objective network and source network also can be asynchronous process.

Figure 11 is that the 3GPP of the asynchronous control of PCRF of the embodiment of the invention two non-3GPP AGW triggerings carries the schematic flow sheet of setting up and discharging in non-3GPP network switching process.Referring to Figure 11, the 3GPP network can insert based on GTP or MIP, and this flow process comprises:

Step 1101～step 1104 is with step 1001～step 1004;

Step 1105, PCRF sets up Indication message according to the IP-CAN Session that receives, generates corresponding PCC Rule, is carried at IP-CAN Session and sets up and to receive the response, and is handed down to Non-3GPPAGW;

In this step, after PCRF reception IP-CAN Session sets up Indication message, according between SourceAGW and the Network Anchor based on MIP or GTP technology, if between Source AGW and the Network Anchor based on MIP, execution in step 1106a～step 1110a, otherwise, execution in step 1106b～step 1108b.

Step 1106a, PCRF sets up Indication message according to the IP-CAN Session that receives, and sends the PCC decision and gives information to 3GPP AGW, requires the corresponding PCC Rule of PCEF deletion on the 3GPP AGW;

Step 1107a, 3GPP AGW send agent binding update messages to Network Anchor, based on corresponding agent binding on Care-of Address (COA) the deletion Network Anchor;

In this step, agent binding update messages comprises User-ID and lifetime parameter, and wherein, the value of lifetime is set to 0.

Step 1108a, Network Anchor return the agent binding 3GPP AGW of receiveing the response;

Step 1109a, 3GPP AGW discharges the IP-CAN Bearer in the 3GPP network according to the PCC Rule that PCRF requires deletion;

Step 1110a, after finishing 3GPP network IP-CAN Bearer and discharging, 3GPP AGW sends the PCC decision and provides and receives the response to PCRF, and the PCC Rule deletion of notice PCRF correspondence is finished.

Step 1106b, PCRF sets up Indication message according to the IP-CAN Session that receives, and sends the PCC decision and gives information to Network Anchor, requires the corresponding PCC Rule of PCEF deletion on the Network Anchor;

Step 1107b, Network Anchor discharges the IP-CAN Bearer in the 3GPP network according to the PCC Rule that PCRF requires deletion;

Step 1108b, after finishing 3GPP network IP-CAN Bearer and discharging, Network Anchor sends the PCC decision and provides and receives the response to PCRF, and the PCC Rule deletion of notice PCRF correspondence is finished.

In the practical application, step 1105 and step 1106a and step 1105 and the not strict sequential relationship of step 1106b, step 1106a and step 1106b also can carry out in step 1104 back.

Embodiment three:

Figure 12 is that the 3GPP of the asynchronous control of PCRF of the embodiment of the invention three non-3GPP Network Anchor triggerings carries the schematic flow sheet of setting up and discharging in non-3GPP network switching process.Referring to Figure 12, the 3GPP network can insert based on GTP or MIP, and this flow process comprises:

Step 1201～step 1203 is with step 1101～step 1103;

Step 1204, non-3GPP Network Anchor sends IP-CAN Session and sets up Indication message to PCRF, requires to generate corresponding PCC Rule;

In this step, IP-CAN Session sets up Indication message and comprises parameter informations such as User-ID, Home Address, Non-3GPP AGW IP Address, APN and RAT Type.Wherein, RAT Type is used to identify the type of current access network, AGW IP Address is an optional parameters, initiates if the IP-CAN Session between Non-3GPPAGW and the PCRF sets up by AGW, and IP-CAN Session sets up and do not comprise this parameter in the Indication message; If the IP-CAN Sessioin between AGW and the PCRF sets up by PCRF and initiates, then comprise this parameter in the message.

Step 1205, PCRF sets up Indication message according to the IP-CAN Session that receives, generate corresponding C harging Rule, is carried at IP-CAN Session and sets up and receive the response, and is handed down to non-3GPPNetwork Anchor;

Step 1206, PCRF sets up Indication message according to the IP-CAN Session that receives, and generates corresponding PCC Rule, gives information by the PCC decision and is handed down to Non-3GPP AGW, Non-3GPPAGW sets up the IP-CAN Bearer of non-3GPP network according to the PCC Rule that receives;

In the practical application, after PCRF reception IP-CAN Session sets up Indication message, according between SourceAGW and the Network Anchor based on MIP or GTP technology, if between Source AGW and the Network Anchor based on MIP, execution in step 1207a～1211a, otherwise, execution in step 1207b～1209b.

Step 1207a～1211a is with step 1106a～1110a.

Step 1207b～1209b is with step 1106b～1108b.

In the practical application, the sequential relationship that step 1205, step 1206 and step 1207a and step 1207b are not strict, step 1207a and step 1207b also can carry out in step 1204 back.

Following embodiment four～embodiment nine is based on the switching of non-3GPP to the 3GPP network, wherein, embodiment four～embodiment six is non-3GPP based on the switching flow of PMIPv6 to the 3GPP network, and embodiment seven～embodiment nine be non-3GPP arrives the 3GPP network based on the CMIPv4FA pattern a switching flow.

Embodiment four:

The schematic flow sheet that the 3GPP of Figure 13 PCRF Synchronization Control that to be the embodiment of the invention four non-3GPP trigger based on PMIPv6 carrying in the non-3GPP network switching process is set up and discharged.Referring to Figure 13, this flow process comprises:

Step 1301, terminal and non-3GPP network connect;

In this step, after terminal and non-3GPP network connect, between terminal and Network Anchor, transmit up-downgoing PDU, between Non-3GPP AGW and NetworkAnchor, set up the MIP tunnel based on PMIPv6 by non-3GPP network.

Step 1302, terminal is found the 3GPP network, and successful access 3GPP network;

Step 1303, terminal and 3GPP AGW connect;

In this step, if 3GPP inserts based on GTP, the then 3GPP AGW at PCEF place and Network Anchor unification; If 3GPP inserts based on IETF Variant (PMIPv6), then 3GPPAGW is established to the MIP tunnel of Network Anchor based on PMIPv6.After terminal and 3GPP AGW connected, 3GPP AGW obtained the IP address of Network Anchor and the information such as far-end address of terminal.

Step 1304,3GPP AGW sends IP-CAN Session and sets up Indication message to PCRF, obtains corresponding PCC Rule.

In this step, IP-CAN Session sets up Indication message and comprises parameter informations such as User-ID, Remote IPAddress, Network AnchorIP Address, APN and RAT Type.Wherein, RAT Type is used to identify the type of current access network; Network Anchor IP Address is an optional parameters, initiates if the IP-CAN Session between Network Anchor and the PCRF sets up by NetworkAnchor, and IP-CAN Session sets up and do not comprise this parameter in the Indication message; If the IP-CAN Session between NetworkAnchor and the PCRF sets up by PCRF and initiates, then comprise this parameter in the message; Remote IP Address is the source end IP address of Network Anchor for the access service of user's distribution, for instance, if insert based on GTP, then source end IP address is PDP Address, if insert based on MIP, then source end IP address is Home Address.

Step 1305, PCRF sets up Indication message according to the IP-CAN Session that receives, and generates corresponding PCC Rule, sets up to receive the response by IP-CAN Session and is handed down to 3GPP AGW;

Step 1306,3GPP AGW sets up IP-CAN Bearer corresponding in the 3GPP network according to the PCC Rule that receives;

Step 1307, after finishing in the 3GPP network IP-CAN Bearer and setting up, 3GPP AGW sends IP-CAN and sets up to finish and receives the response to PCRF, and the IP-CAN Bearer of notice PCRF correspondence sets up and finishes.

Step 1308, PCRF sends the PCC decision and gives information to Non-3GPP AGW after determining that corresponding carrying foundation is finished in the 3GPP network, requires the corresponding PCC Rule of PCEF deletion on the Non-3GPP AGW;

Step 1309, Non-3GPP AGW sends agent binding update messages to Network Anchor, based on corresponding agent binding on Care-of Address (COA) the deletion Network Anchor;

Step 1310, Network Anchor returns the agent binding Non-3GPP AGW of receiveing the response;

In this step, if there is not the agent binding of this corresponding COA among the Network Anchor, Network Anchor is changed to 133 with the treatment state of agent binding update messages in agent binding is receiveed the response, notice Non-3GPP AGW represents that promptly Network Anchor is not this user's HA.

Step 1311, Non-3GPP AGW discharges the IP-CAN Bearer in the non-3GPP network according to the PCC Rule that PCRF requires deletion;

In this step, if terminal has dual radio ability, then terminal participates in the carrying of non-3GPP network and the release flow process of related resource are dotted among the figure.

Step 1312, after finishing non-3GPP network IP-CAN Bearer and discharging, Non-3GPP AGW sends the PCC decision PCRF of receiveing the response is provided, and the PCC Rule of notice PCRF correspondence discharges and finishes.

Embodiment five:

Among the embodiment four, the carrying dispose procedure of the loading establishing process of objective network and source network is synchronous process, and in the practical application, the carrying dispose procedure of the loading establishing process of objective network and source network also can be asynchronous process.

Figure 14 is that the embodiment of the invention five non-3GPP are based on the switching of PMIPv6 to the 3GPP network, by the schematic flow sheet of non-3GPP network carrying foundation of the asynchronous control of PCRF of 3GPP AGW triggering and release.Referring to Figure 14, this flow process comprises:

Step 1401～step 1404 is with step 1201～step 1204;

Step 1405, PCRF sets up Indication message according to the IP-CAN Session that receives, and generates corresponding PCC Rule, sets up to receive the response by IP-CAN Session and is handed down to 3GPP AGW;

Step 1406, PCRF sends the PCC decision and gives information to Non-3GPP AGW, requires the corresponding PCC Rule of PCEF deletion on the Non-3GPP AGW;

Step 1407, Non-3GPP AGW sends agent binding update to Network Anchor, based on corresponding agent binding on Care-of Address (COA) the deletion Network Anchor;

Step 1408, Network Anchor returns the agent binding Non-3GPP AGW of receiveing the response;

Step 1409, Non-3GPP AGW discharges the IP-CAN Bearer in the non-3GPP network according to the PCC Rule that PCRF requires deletion;

Step 1410, after finishing non-3GPP network IP-CAN Bearer and discharging, Non-3GPP AGW sends the PCC decision PCRF of receiveing the response is provided, and the PCC Rule deletion of notice PCRF correspondence is finished.

In the practical application, step 1405 also can be carried out in step 1404 back with the not strict sequential relationship of step 1406, step 1406.

Embodiment six:

Figure 15 is that the embodiment of the invention six non-3GPP are based on the switching of PMIPv6 to the 3GPP network, by the schematic flow sheet of non-3GPP network carrying foundation of the asynchronous control of PCRF of Network Anchor triggering and release.Referring to Figure 15, this flow process comprises:

Step 1501～step 1503 is with step 1401～step 1403;

Step 1504,3GPP Network Anchor sends IP-CAN Session and sets up Indication message to PCRF, requires to generate corresponding PCC Rule;

In this step, IP-CAN Session sets up Indication message and comprises parameter informations such as User-ID, Remote IPAddress, 3GPP AGW Address, APN and RAT Type.Wherein, RATType is used to identify the type of current access network; 3GPP AGW IP Address is an optional parameters, initiates if the IP-CAN Session between 3GPP AGW and the PCRF sets up by AGW, and IP-CANSession sets up and do not comprise this parameter in the Indication message; If the IP-CAN Session between 3GPP AGW and the PCRF sets up by PCRF and initiates, then comprise this parameter in the message; Remote IP Address is the source end IP address of Network Anchor for the access service of user's distribution, for instance, if insert based on GTP, then source end IP address is PDP Address, if insert based on MIP, then source end IP address is Home Address.

Step 1505, PCRF sets up Indication message according to the IP-CAN Session that receives, and generates corresponding C harging Rule, sets up to receive the response by IP-CAN Session and is handed down to 3GPP NetworkAnchor;

Step 1506, PCRF sets up Indication message according to the IP-CAN Session that receives, and generates corresponding PCC Rule, gives information by the PCC decision and is handed down to 3GPP AGW, after 3GPP AGW receives corresponding PCC Rule, initiate the flow process of setting up of 3GPP network IP-CAN Bearer;

Step 1507, PCRF sends the PCC decision and gives information to Non-3GPP AGW, requires to discharge the corresponding PCC Rule of PCEF deletion on the Non-3GPP AGW;

Step 1508～step 1511 is with step 1407～step 1410.

In the practical application, the sequential relationship that step 1505, step 1506 and step 1507 are not strict, step 1507 also can be carried out in step 1504 back, also can carry out in step 1505 back; Step 1506 also can be carried out in step 1504 back, also can carry out in step 1507 back.

Embodiment seven:

Figure 16 is the switching that the embodiment of the invention seven non-3GPP arrive the 3GPP network based on CMIPv4 FA pattern, the schematic flow sheet that the non-3GPP network carrying of PCRF Synchronization Control is set up and discharged.Referring to Figure 16, this flow process comprises:

Step 1601, terminal and non-3GPP network connect;

In this step, after terminal and non-3GPP network connect, between terminal and Network Anchor, transmit up-downgoing PDU by non-3GPP network, between Non-3GPP AGW and NetworkAnchor, set up the MIP tunnel, promptly set up the tunnel between FA and the HA based on CMIPv4.

Step 1602～step 1608 is with step 1302～step 1308;

Step 1609, the registration revocation message that Non-3GPP AGW sends based on CMIPv4 arrives Network Anchor, based on the corresponding registration based on CMIPv4 on Care-of Address (COA) the deletion Network Anchor;

In this step, based on the registration revocation message of CMIPv4, promptly MIPv4 RegistrationRevocation message comprises User-ID and lifetime parameter, and wherein, the value of lifetime is set to 0.

Step 1610, Network Anchor returns based on the registration revocation of the CMIPv4 Non-3GPP AGW of receiveing the response, i.e. MIPv4Registration Acknowledge message, notice Non-3GPPAGW registration revocation is finished;

Step 1611, the PCC Rule that Non-3GPP AGW deletes as requested discharges the IP-CAN Bearer in the non-3GPP network;

In this step, if terminal has dual radio ability, then terminal participates in the carrying of non-3GPP network and the release flow process of related resource, dot among the figure, in this process, Non-3GPPAGW may send agency's broadcasting (Agent Advertisement) and give terminal, its sequence number (SequenceNumber=0), and its CMIPv4 FA registration of notice terminal is cancelled.

Step 1612, after finishing non-3GPP network IP-CAN Bearer and discharging, Non-3GPP AGW sends the PCC decision PCRF of receiveing the response is provided, and the PCC Rule of notice PCRF correspondence discharges and finishes.

Embodiment eight:

Among the embodiment seven, the carrying dispose procedure of the loading establishing process of objective network and source network is synchronous process, and in the practical application, the carrying dispose procedure of the loading establishing process of objective network and source network also can be asynchronous process.

Figure 17 is that the embodiment of the invention eight non-3GPP are based on the switching of CMIPv4 FA pattern to the 3GPP network, by the schematic flow sheet of non-3GPP network carrying foundation of the asynchronous control of PCRF of 3GPP AGW triggering and release.Referring to Figure 17, this flow process comprises:

Step 1701, terminal and non-3GPP network connect;

Step 1702～step 1706 is with step 1402～step 1406;

Step 1707, the registration revocation message that Non-3GPP AGW sends based on CMIPv4 arrives Network Anchor, based on the corresponding registration based on CMIPv4 on Care-of Address (COA) the deletion Network Anchor;

Step 1708, Network Anchor returns based on the registration revocation of the CMIPv4 Non-3GPP AGW of receiveing the response, i.e. MIPv4 Registration Acknowledge message, notice Non-3GPPAGW registration revocation is finished;

Step 1709, the PCC Rule that Non-3GPP AGW deletes as requested discharges the IP-CAN Bearer in the non-3GPP network;

In this step, if terminal has dual radio ability, then terminal participates in the carrying of non-3GPP network and the release flow process of related resource, dot among the figure, in this process, Non-3GPPAGW may send Agent Advertisement (Sequence Number=0) and give terminal, and its CMIPv4 FA registration of notice terminal is cancelled.

Step 1710, after finishing non-3GPP network IP-CAN Bearer and discharging, Non-3GPP AGW sends the PCC decision PCRF of receiveing the response is provided, and the PCC Rule of notice PCRF correspondence discharges and finishes.

Embodiment nine:

Figure 18 is that the embodiment of the invention nine non-3GPP are based on the switching of CMIPv4 FA pattern to the 3GPP network, by the schematic flow sheet of non-3GPP network carrying foundation of the PCRF Synchronization Control of 3GPP Network Anchor triggering and release.Referring to Figure 18, this flow process comprises:

Step 1801～step 1803 is with step 1501～step 1503;

Step 1804,3GPP network N etwork Anchor sends IP-CAN Session and sets up Indication message to PCRF, requires to generate corresponding PCC Rule;

In this step, IP-CAN Session sets up Indication message and comprises parameter informations such as User-ID, Home Address, HA Address, APN and RAT Type.Wherein, RAT Type is used to identify the type of current access network.

Step 1805, PCRF sets up Indication message according to the IP-CAN Session that receives, and generates corresponding C harging Rule, sets up to receive the response by IP-CAN Session and is handed down to 3GPP NetworkAnchor;

Step 1806, PCRF sets up Indication message according to the IP-CAN Session that receives, generate corresponding PCC Rule, set up indication by IP-CAN Session and be handed down to 3GPP AGW, require 3GPPAGW to set up the IP-CAN Bearer of 3GPP network, and set up the Session binding between PCRF and the 3GPP AGW;

Step 1807, PCRF sends IP-CAN Session termination indication, and (APN) message is given Non-3GPP AGW for User-ID, Remote IPAddress, requires to discharge the IP-CANBearer of non-3GPP network;

In this step, IP-CAN Session stops Indication message and comprises parameter informations such as User-ID, Remote IPAddress and APN.

Step 1808～step 1811 is with step 1107～step 1110.

In the practical application, the sequential relationship that step 1805, step 1806 and step 1807 are not strict, step 1807 also can be carried out in step 1804 back.

As seen from the above-described embodiment, the method and system of releasing source network resource in a kind of evolvement network handoff procedure of the embodiment of the invention, by in the objective network carrying is set up or after setting up, PCRF is by the release of synchronous or asynchronous Controlling Source Internet resources, in the dispose procedure of the Synchronization Control source network resource of PCRF, network anchor point or objective network IAD transmit a request to PCRF, require to generate new PCCRule to Target AGW, after Target AGW finishes objective network carrying foundation, send message informing PCRF, trigger PCRF and initiate the process that the source network carrying discharges; Asynchronous process of carrying out objective network carrying foundation and the release of source network resource, be that PCRF receives after IP-CAN Session that Target AGW or network anchor point send sets up message, send PCC and determine to give information Source AGW, require the carrying and the related resource of source of release network, can trigger the asynchronous control carrying of PCRF by Target AGW or Network Anchor and discharge flow process, can be based on the switching of 3GPP to non-3GPP network, also can be based on the switching of non-3GPP to the 3GPP network, make terminal after source network switching target network, can in time carry out the release of source network bearing resource, improve the service efficiency of source network bearing resource, reduced the waste of resource.

More than lift preferred embodiment; the purpose, technical solutions and advantages of the present invention are further described; institute is understood that; the above only is preferred embodiment of the present invention; not in order to restriction the present invention; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the method for releasing source network resource in the evolvement network handoff procedure is characterized in that this method comprises:

2. the method for claim 1 is characterized in that, the step that described objective network is set up IP access network IP-CAN carrying comprises:

PCEF on the objective network sends the IP-CAN session and sets up Indication message to PCRF;

PCRF sets up Indication message according to the IP-CAN session that receives, generate the PCC Rule Information, is carried at the IP-CAN session and sets up and receive the response, and is sent to the PCEF on the objective network;

The PCC Rule Information that the IP-CAN session that PCEF on the objective network issues according to PCRF is carried in setting up and receiveing the response is set up the IP-CAN carrying.

3. method as claimed in claim 2 is characterized in that, described objective network is objective network IAD or network anchor point.

4. method as claimed in claim 2, it is characterized in that, described IP-CAN session is set up Indication message and is comprised user ID, wireless access type, remote ip address, Operational Visit point domain name, or user ID, wireless access type, network anchor point IP address, remote ip address and Operational Visit point domain name.

5. the method for claim 1, it is characterized in that, the described PCC of issuing decision gives information, the step of carrying and related resource comprises in the source of release network: issue PCC and determine to give information the source network IAD, the source network IAD receives the PCC decision and gives information, and initiates carrying and related resource in the source of release network.

6. method as claimed in claim 5, it is characterized in that, described source network is first communication network, objective network is the second communication network, described first communication network, terminal is under Mobility Management Entity control, be established to the IP connectivity of data gateway by gateway, described second communication network, terminal is established to the IP connectivity of data gateway under the control of border IAD, the border IAD is connected by the tunnel with data gateway, or described source network is the second communication network, and objective network is first communication network.

7. method as claimed in claim 6 is characterized in that, described source network is first communication network, and objective network is the second communication network, and the described PCC of issuing decision gives information, and the step of carrying and related resource comprises in the source of release network:

PCRF sends the PCC decision and gives information to the first communication network IAD after determining that corresponding carrying foundation is finished in the second communication network, carries the corresponding PCC Rule Information of PCEF deletion that requires on the first communication network IAD;

The first communication network IAD receives the PCC decision and gives information, and sends agent binding update messages to network anchor point;

Network anchor point receives agent binding update messages, deletes agent binding corresponding on the network anchor point and returns agent binding to the first communication network IAD based on Care-of Address and receive the response;

The first communication network IAD discharges the IP-CAN carrying in first communication network according to the PCC Rule Information that the PCRF that receives requires deletion.

8. method as claimed in claim 6 is characterized in that, described source network is first communication network, and objective network is the second communication network, and the described PCC of issuing decision gives information, and the step of carrying and related resource comprises in the source of release network:

PCRF sends the PCC decision and gives information to network anchor point after determining that corresponding carrying foundation is finished in the second communication network, carries the corresponding PCC Rule Information of PCEF deletion that requires on the network anchor point;

Network anchor point discharges the IP-CAN carrying in first communication network according to the PCC Rule Information that the PCRF that receives requires deletion.

9. method as claimed in claim 6 is characterized in that, described source network is the second communication network, objective network is first communication network, the second communication network is based on the mobile PMIPv6 of agency, and the described PCC of issuing decision gives information, and the step of carrying and related resource comprises in the source of release network:

PCRF sends the PCC decision and gives information to the second communication network access gateway after determining that corresponding carrying foundation is finished in first communication network, carries the corresponding PCC Rule Information of PCEF deletion that requires on the second communication network access gateway;

The second communication network access gateway receives the PCC decision and gives information, and sends agent binding update messages to network anchor point;

Network anchor point receives agent binding update messages, deletes agent binding corresponding on the network anchor point and returns agent binding to the second communication network access gateway based on Care-of Address and receive the response;

The second communication network access gateway discharges the IP-CAN carrying in the second communication network according to the PCC Rule Information that the PCRF that receives requires deletion.

10. method as claimed in claim 9 is characterized in that, described agent binding update messages comprises that user ID and value are set to 0 life cycle parameter.

11. method as claimed in claim 6, it is characterized in that, described source network is the second communication network, objective network is first communication network, the second communication network is based on client mobile IP Foreign Agent CMIPv4FA pattern, the described PCC of issuing decision gives information, and the step of carrying and related resource comprises in the source of release network:

The second communication network access gateway receives the PCC decision and gives information, to the registration revocation message of network anchor point transmission based on CMIPv4;

Network anchor point receives registration revocation message, receives the response based on corresponding returning based on the registration revocation of CMIPv4 based on the registration of CMIPv4 and to the second communication network access gateway on the Care-of Address deletion network anchor point;

After second communication network access gateway reception registration revocation is receiveed the response,, discharge the IP-CAN carrying in the second communication network of network according to the PCC Rule Information of the requirement deletion that receives.

12. method as claimed in claim 11 is characterized in that, described registration revocation message based on CMIPv4 comprises that user ID and value are set to 0 life cycle parameter.

13. method as claimed in claim 11, it is characterized in that, described second communication network access gateway is according to the PCC Rule Information of the requirement deletion that receives, the IP-CAN carrying that discharges in the second communication network further comprises: the second communication network access gateway sends to terminal and acts on behalf of broadcast, the described sequence number value of acting on behalf of in the broadcast is set to 0, terminal receives acts on behalf of broadcast, participates in the carrying of second communication network and the release of related resource.

14. the method for claim 1 is characterized in that, this method further comprises: after finishing in the source network carrying and related resource and discharging, source network sends the PCC decision and provides and receives the response to PCRF, and notice has been deleted corresponding PCC rule.

15. the method for releasing source network resource in the evolvement network handoff procedure is characterized in that this method comprises:

16. method as claimed in claim 15, it is characterized in that, the described PCC of issuing decision gives information, the carrying and the step of related resource comprise in the source of release network: issue PCC decision the give information IAD or the network anchor point of source network, the IAD of source network or network anchor point receive the PCC decision and give information, and initiate carrying and related resource in the source of release network.

17. method as claimed in claim 16 is characterized in that, described source network is first communication network, and objective network is the second communication network, and the described PCC of issuing decision gives information, and the step of carrying and related resource comprises in the source of release network:

PCRF sends the PCC decision and gives information to the first communication network IAD, carries the strategy and the corresponding PCC Rule Information of charging enhancement function entity PCEF deletion that require on the first communication network IAD;

The first communication network IAD receives agent binding and receives the response, and according to the PCC Rule Information that the PCRF that receives requires deletion, discharges the IP-CAN carrying in first communication network.

18. method as claimed in claim 16 is characterized in that, described source network is first communication network, and objective network is the second communication network, and the described PCC of issuing decision gives information, and the step of carrying and related resource comprises in the source of release network:

PCRF sends the PCC decision and gives information to network anchor point, carries the corresponding PCC Rule Information of PCEF deletion that requires on the network anchor point;

Network anchor point receives the PCC decision and gives information, and the PCC Rule Information according to PCRF requires deletion discharges the IP-CAN carrying in the first communication network network.

19. method as claimed in claim 16 is characterized in that, described source network is the second communication network, objective network is first communication network, the second communication network is based on PMIPv6, and the described PCC of issuing decision gives information, and carrying and related resource comprise in the source of release network:

PCRF sends the PCC decision and gives information to the second communication network access gateway, carries the corresponding PCC Rule Information of PCEF deletion that requires on the second communication network access gateway;

The second communication network access gateway receives agent binding and receives the response, and according to the PCC Rule Information that the PCRF that receives requires deletion, discharges the IP-CAN carrying in the second communication network.

20., it is characterized in that described agent binding update messages comprises user ID and value is set to 0 life cycle parameter as claim 17 or 19 described methods.

21. method as claimed in claim 16 is characterized in that, described source network is the second communication network, objective network is first communication network, the second communication network is based on the CMIPv4FA pattern, and the described PCC of issuing decision gives information, and carrying and related resource comprise in the source of release network:

PCRF sends the PCC decision and gives information to the second communication network access gateway, requires the corresponding PCC rule of PCEF deletion on the second communication network access gateway;

The PCC rule that the second communication network access gateway is deleted as requested discharges the IP-CAN carrying in the second communication network of network.

22. method as claimed in claim 21, it is characterized in that, the step of the IP-CAN carrying in the described release second communication network further comprises: the second communication network access gateway sends to terminal and acts on behalf of broadcast, the described sequence number value of acting on behalf of in the broadcast is set to 0, terminal receives acts on behalf of broadcast, participates in the carrying of second communication network of network and the release of related resource.

23. the system of releasing source network resource in the evolvement network handoff procedure is characterized in that this system comprises: objective network IAD, PCRF, network anchor point and source network IAD, wherein,

24. the system of releasing source network resource in the evolvement network handoff procedure is characterized in that this system comprises: objective network IAD, PCRF, network anchor point and source network IAD, wherein,