CN102387558A

CN102387558A - Method and system for releasing resource network resources in evolved network switching process

Info

Publication number: CN102387558A
Application number: CN2011103291772A
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: 2012-03-21
Anticipated expiration: 2027-08-21
Also published as: CN101374339B; CN101374339A; CN102387558B

Abstract

The invention discloses a method and a system for releasing resource network resources in the evolved network switching process, a PCRF (policy and charging rules function) is released by a synchronous or asynchronous control source network resource during or after building a target network load, in the releasing process of the synchronous control source network resource of the PCRF, a target network sends requests to PCRF, a new PCC (policy and charging control) rule requires to be generated to the target network, a message is sent to inform the PCRF after the target network load is built, the source network load releasing process is started by triggering the PCRF, the processes of the target network load building and the source network resource releasing are carried out in an asynchronous way, namely the PCRF receives an IP (identification of position) sent by the target network, PCC determining messages are sent to a source network and are accessed into a gateway after the IP is accessed into a network conversion and builds the messages, and the load and related resources of the source network are required to be released. By using the invention, a terminal can release the source network load resource after being switched from the source network to the target network, so that the using efficiency of the source network load resource is improved, and the waste of the resources can be reduced.

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, needing 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; User data rate more at a high speed, 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 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 like 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 (Serving Gateway), packet data network gateway (PDN Gateway; Packet Data Network Gateway), UMTS Terrestrial radio access network of evolution (E-UTRAN, Evolved UMTS Territorial Radio Access Network) and "Policy and Charging Rules Function entity (PCRF, Policy and Charging Rule Function); E-UTRAN links to each other through S1-MME interface with MME; MME links to each other through the S11 interface with Serving Gateway, and Serving Gateway links to each other through the S5 interface with PDN Gateway, and Serving Gateway and PDN Gateway link to each other with PCRF through 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 the strategy that disperses strategy and charging enhancement function entity (PCEF, Policy and Charging Enforcement Function) and control (PCC, the Policy and Charging Control) framework that charges; By visit public mobile network (VPLMN; Visited Public Land Mobile Network) and local public mobile network (HPLMN, Home PLMN) be divided into three parts, wherein; The main MME of the evolution block core net network of EPS network (EPC, Evolved Packet Core), Serving Gateway and three logic function modules of 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. are with current UMTS (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 plane anchor point between the different access systems in the 3GPP system; Directly face the access of 3GPP connecting system; It is the user plane 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 Serving Gateway in a period of time; PDN Gateway is the user plane 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 through the S11 interface, and Serving Gateway is connected with PDN Gateway through the S8b interface, and Serving Gateway and PDN Gateway form EPS gateway (EPS GW, EPS Gateway).

When 3GPP inserts, at local agent (HA, Home Agent) like 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 through the S7 interface and is connected; The S2a interface is the interface that reliable non-3 GPP inserts EPS; Mainly based on proxy-mobile IP v6 (PMIPv6, Proxy Mobility IP) and Foreign Agent (FA, Foreign Agent) pattern such as the client mobile IP (CMIPv4FA of network-based; Common Management IPv4FA) the Internet engineering duty group (IETF, Internet Engineering Task Force) 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/Legacy 3GPP 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, made the terminal when moving, can not change its local address, when the terminal moves to a non-local network; Obtain a COA who belongs to current network, and the local address (HOA, Home-of address) at this COA and terminal is bound; When bag mails to the HOA at this terminal; The HA at terminal will mail to this Care-of Address to packet, thereby accomplishes route, mainly comprises CMIP and PMIP technology; CMIP is based on the mobile IP technology of main frame, just needs the terminal to participate in moving the binding procedure of IP; PMIP is based on the mobile IP technology of network, does not need the terminal to participate in moving the process of IP, and the behavior replacement terminal of network meeting proxy terminal is initiated to move IP and bound.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 confirmed, and how MME, Serving Gateway and PDN Gateway are combined in the corresponding entity and also confirm.

WLAN (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, use the miscellaneous service in the 3GPP system, 3GPP has set up WLAN interconnected (IWLAN, Interworking WLAN) project; The intercommunication problem of research WLAN and 3GPP system, thus make the user of 3GPP system to insert the 3GPP system through WLAN.

Fig. 3 is existing WLAN interconnected systems configuration diagram.Referring to Fig. 3; This system architecture comprises WLAN UE, WLAN access network (WLANAccess Network), Intranet/the Internet (Intranet/Internet) and 3GPP local network (3GPP Home Network); Wherein, WLAN UE inserts WLAN Access Network through the Ww interface, carries out alternately with Intranet/Internet; WLAN Access Network links to each other with 3GPP Home Network through Wa and Wn interface; In 3GPP Home Network, WLAN UE is carried out authentication reach, provide 3GPP professional 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, World Interoperability for Microwave Access) and ADSL any access waies that is the basis with the IP technology such as (ADSL, Asymmetric Digital Subscriber Line).

The terminal is after getting into network; Leave the source network at present place if desired, get in the process of another objective network, need carry out network and switch; In the process of switching; In order to guarantee professional continuity, the carrying in the source network need switch to objective network, comprises that objective network loading establishing process and source network carry dispose procedure.After the 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; Like the switching between the 3GPP network; Because between the chain of command entity MME of two networks or the SGSN connection is arranged, after the terminal switched to objective network, objective network MME or SGSN can carry out the release of resource through 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 objective network and carry the situation of setting up; 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 sketch map 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 UMTS Territorial Radio Access Network) Access Network connects, and service data visitation is carried out through the connection of setting up in the terminal;

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 possibly not connect foundation.

Step 402, the reliable non-3 GPP Access Network is found at the terminal, 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 the terminal, reliable non-3 GPP Access Network and AAA server (AAA Server; 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 Binding Update) message to PDN GW;

Step 407, PDN GW creates or revises the banding cache inlet (BCE, Binding Cache Entry) to 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 accomplished the network attachment flow process.

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

As can be seen from Figure 4, in current switching flow, at the 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 the 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 the terminal when source network switches to objective network, after objective network was set up IP access to network conversation IP-CAN and carried, "Policy and Charging Rules Function entity PCRF received the IP-CAN session and sets up to accomplish and receive the response;

Said PCRF distributing policy and charging control PCC determine to give information source network IAD or network anchor point, so that carry and related resource in said source network IAD or the network anchor point source of release network.

When the terminal when source network switches to objective network; After Indication message is set up in "Policy and Charging Rules Function entity PCRF reception IP-CAN session; Said PCRF distributing policy and charging control PCC determine the give information IAD or the network anchor point of source network, so that carry and related resource in the IAD of said source network or the network anchor point 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, receive IP-CAN session foundation and receive 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 that initiates objective network carries and sets up, and transmission IP-CAN session is set up to accomplish and 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, generates 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 accomplish 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, produces 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 accomplish and is receiveed the response, and issues PCC and determines 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 source network and carry out the PCEF that IP-CAN carries control, the PCC decision that reception PCRF issues gives information, and triggers 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.

Visible by technique scheme; The method and system of releasing source network resource in a kind of evolvement network handoff procedure of the embodiment of the invention are through in objective network carry to be set up or after setting up, PCRF is through 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 PCC Rule to Target AGW, after Target AGW accomplishes objective network carrying foundation; Send message informing PCRF, trigger PCRF and initiate the process that source network carries release; Asynchronous process of carrying out objective network carrying foundation and the release of source network resource; Be that PCRF receives after IP access to network conversation (IP-CAN Session, IP Connectivity Access Network Session) that Target AGW or network anchor point send sets up message, send the PCC decision Source AGW that gives information; Require the carrying and the related resource of source of release network; Can trigger the asynchronous control of PCRF through Target AGW or Network Anchor and carry release flow, can be based on the switching of 3GPP, also can be based on the switching of non-3GPP to the 3GPP network to non-3GPP network; Make the 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, reduce 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 interconnected systems configuration diagram;

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

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

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

Fig. 7 is the carrying release flow sketch map of embodiment of the invention PCRF Synchronization Control;

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

Fig. 9 is the carrying release flow sketch map 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 3GPP of Figure 13 PCRF Synchronization Control that to be the embodiment of the invention four non-3GPP trigger based on PMIPv6 carries the schematic flow sheet of setting up and discharging in non-3GPP network switching 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 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 3GPPAGW 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 the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is done further explain.

The embodiment of the invention passes through in the objective network carrying is set up or after setting up, PCRF makes the terminal after source network switching target network through 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 sketch map 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 sends IP-CAN Session foundation completion and 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 accomplish receives the response, and issues PCC and determines to give information Network Anchor53, requires the PCC Rule of Network Anchor53 deletion correspondence; 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, and triggers the PCEF logical functional entity and sends resource release message to Source AGW54, sends PCC to PCRF52 and determines to provide to receive the response;

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, and 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, and PCRF52 receives IP-CAN Session and 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 AGW51, Target AGW51 receives IP-CAN Session and sets up and to receive 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 after the foundation, sends IP-CAN Session foundation completion and receives the response to PCRF52; PCRF52 receives IP-CAN Session foundation completion and 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; Source AGW54 receives the resource release message that Network Anchor53 sends, and after the carrying and related resource of correspondence, sends feedback message to Network Anchor53 in the source of release network; The corresponding PCC Rule of Network Anchor53 deletion; Send PCC to PCRF52 and determine 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, and the PCEF on the Target AGW51 sends IP-CAN Session to PCRF52 and sets up Indication message, and PCRF52 receives IP-CAN Session and sets up Indication message; Produce corresponding PCC Rule information; Be carried at IP-CAN Session and set up and to receive the response, be sent to Target AGW51, Target AGW51 receives IP-CAN Session and sets up and to receive 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 after the foundation, sends IP-CAN Session foundation completion and 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, and requires the corresponding PCC Rule of Network Anchor53 deletion, and Network Anchor53 receives the PCC decision and gives information; Initiate the source network release flow with the source of release network carrying and related resource; And delete corresponding PCC Rule, after accomplishing resource release, send PCC to PCRF52 and determine 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 sketch map 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, Network Anchor63 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 sends IP-CAN Session foundation completion and 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 accomplish receives the response, and issues PCC and determines to give information Source AGW64, requires the PCC Rule of Source AGW64 deletion correspondence; The PCC decision that receives Source AGW64 transmission provides receives the response, and knows that Source AGW64 has deleted corresponding PCC Rule;

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 source network and carry out the PCEF logical functional entity (not shown) that IP-CAN carries 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 Network Anchor63.

The flow process of Fig. 6 comprises two kinds of interactive modes, synchronous interaction mode and asynchronous interactive mode, and the synchronous interaction mode can be described below: after terminal and network connect; PCRF62 issues charging regulation to Network Anchor63, and Source AGW64 receives the charging regulation that PCRF62 issues, and charges; PCEF on the Target AGW61 sends IP-CAN Session to PCRF62 and sets up Indication message, and PCRF62 receives IP-CAN Session and 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, Target AGW61 receives IP-CAN Session and sets up and to receive 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; Send IP-CAN Session foundation completion and receive the response to PCRF62, PCRF62 reception IP-CAN Session sets up to accomplish receives the response, and issues PCC and determines to give information Source AGW64; Require the corresponding PCC Rule of Source AGW64 deletion; The PCC decision that Source AGW64 reception PCRF62 issues gives information, and triggers the source network release flow with the source of release network carrying and related resource through the PCEF logical functional entity, and the corresponding PCC Rule of deletion; After accomplishing resource release; Send PCC to PCRF62 and determine 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, is carried at IP-CAN Session and sets up and receive the response; Be sent to Target AGW61; Target AGW61 receives IP-CAN Session foundation and receives the response, and sets up the PCC Rule information of receiveing the response and carrying according to the IP-CAN Session that receives, and the IP-CAN Bearer that initiates objective network sets up; After the foundation, send IP-CAN Session foundation completion and receive 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, and requires the corresponding PCC Rule of Source AGW64 deletion, and Source AGW64 receives the PCC decision and gives information; Initiate the source network release flow with the source of release network carrying and related resource; And delete corresponding PCC Rule, after accomplishing resource release, send PCC to PCRF62 and determine 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 accomplish receive the response after, just send the PCC decision Source AGW that gives information, require to discharge corresponding carrying and relevant resource.

Fig. 7 is the carrying release flow sketch map of embodiment of the invention PCRF Synchronization Control.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 through source network.

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

Step 703, the terminal connects through 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 ID (User ID), wireless access type (RAT Type; Radio Access Technology Type), network anchor point IP address (Network AnchorIP Address), remote ip address (Remote IP Address) and Operational Visit point domain name parameter informations such as (APN, Access Point Name).Wherein, Network Anchor IP 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 Home Address.

Step 705; PCRF receives IP-CAN Session and sets up Indication message, and related new IP-CAN Session and business information produce corresponding PCC Rule information; Be carried at IP-CAN Session and set up and to receive the response, send 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 at terminal;

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

In this step, after PCRF reception IP-CAN Session foundation is accomplished and receiveed the response, based on MIP or GTP technology between Source AGW 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 the affirmation objective network is accomplished corresponding carrying foundation, requires the corresponding PCC Rule of PCEF deletion on the Source AGW;

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

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

Step 710a, after completion carrying and resource discharged, Source AGW sent PCC and determines to provide to receive the response to PCRF, notified its corresponding PCC Rule to delete and accomplished.

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

Step 709b, Network Anchor initiates the release flow 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 the terminal has double-direction radio, then the terminal participates in the carrying of source network and the release flow of related resource are dotted among the figure.

Step 710b, after completion carrying and resource discharged, Network Anchor sent PCC and determines to provide to receive the response to PCRF, notified its corresponding PCC Rule to delete and accomplished.

The process of setting up for the objective network carrying; Also can initiate, will comprise corresponding parameters User ID, APN by Network Anchor; RAT Type; The IP-CAN Session of information such as Target AGW IP Address and Remote IP 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 accomplishing carrying foundation, Target AGW redispatches and receives the response to PCRF, and notice PCRF carries and sets up completion, and PCRF is initiated to the carrying release flow of source network again.In this process, Target AGW IP 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 corresponding carrying and relevant resource.

Entity according to triggering PCRF initiation release flow is different, comprises dual mode:

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

Fig. 8 is the carrying release flow sketch map 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, repeats no more at this;

Step 805, PCRF receives IP-CAN Session and sets up Indication message, and related new IP-CAN Session 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 Source AGW 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 of carrying and related resource, the carrying and the related resource of correspondence in the source of release network;

Step 808a, after completion carrying and resource discharged, Source AGW sent PCC and determines to provide to receive the response to PCRF, notified the PCC Rule deletion of correspondence to accomplish.

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 of carrying and related resource, the carrying and the related resource of correspondence in the source of release network;

Step 808b, after completion carrying and resource discharged, Network Anchor sent PCC and determines to provide to receive the response to PCRF, notified the PCC Rule deletion of correspondence to accomplish.

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 of PCRF and carries release

Fig. 9 is the carrying release flow sketch map 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, repeats no more at this;

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, Target AGW IP Address is an optional parameters, initiates if the IP-CAN Session 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-CAN Session 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 through the PCC decision sends to Target AGW, and Target AGW carries according to the PCC Rule initiation objective network of receiving and sets up flow process;

In this step; After PCRF reception IP-CAN Session sets up Indication message; According between Source AGW 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, lift nine embodiment below, be elaborated to using embodiment of the present invention in the system of releasing source network resource in the evolvement network handoff procedure.

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 like 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, requires to generate new PCC Rule; Be issued to Target AGW; After Target AGW accomplished objective network carrying foundation, transmission IP-CAN Session foundation was accomplished to receive the response and is notified PCRF, the process that the carrying of triggering PCRF initiation source network discharges.

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) through 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 the 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 home address (Home Address) and the Network Anchor IP Address at terminal.

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-CAN Session 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-3GPP AGW;

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 accomplishing non-3GPP network, Non-3GPP AGW sends IP-CAN Session foundation completion receiveed the response to PCRF, and the IP-CAN Bearer that notice PCRF is corresponding sets up completion;

In the practical application; After PCRF reception IP-CAN Session sets up Indication message; According between Source AGW 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 confirming that completion is set up in corresponding carrying in the non-3GPP network, require the PCEF on the 3GPP AGW to delete corresponding PCC Rule;

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

Step 1012a, after completion 3GPP network IP-CAN Bearer discharged, 3GPP AGW transmission PCC Rule provides receiveed the response to PCRF, and the PCC Rule that notice PCRF is corresponding deletes and accomplishes.

Step 1008b, PCRF send the PCC decision and give information to Network Anchor after confirming that completion is set up in corresponding carrying in the non-3GPP network, require the PCEF on the Network Anchor to delete corresponding PCC Rule;

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

Step 1010b, after completion 3GPP network IP-CAN Bearer discharged, Network Anchor transmission PCC Rule provides receiveed the response to PCRF, and the PCC Rule that notice PCRF is corresponding deletes and accomplishes.

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-3GPP AGW;

In this step; After PCRF reception IP-CAN Session sets up Indication message; According between Source AGW 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 completion 3GPP network IP-CAN Bearer discharged, 3GPP AGW sent PCC and determines to provide to receive the response to PCRF, and the PCC Rule deletion of notice PCRF correspondence is accomplished.

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 completion 3GPP network IP-CAN Bearer discharged, Network Anchor sent PCC and determines to provide to receive the response to PCRF, and the PCC Rule deletion of notice PCRF correspondence is accomplished.

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-3GPP AGW 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-3GPP Network Anchor;

Step 1206; PCRF sets up Indication message according to the IP-CAN Session that receives, and generates corresponding PCC Rule, gives information through 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 Source AGW 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 3GPP of Figure 13 PCRF Synchronization Control that to be the embodiment of the invention four non-3GPP trigger based on PMIPv6 carries the schematic flow sheet of setting up and discharging in non-3GPP network switching process.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 Network Anchor, set up the MIP tunnel based on PMIPv6 through non-3GPP network.

Step 1302, the 3GPP network is found at the terminal, 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 3GPP AGW 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 at 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 IP Address, Network Anchor IP Address, APN and RAT Type.Wherein, RAT Type is used to identify the type of current access network; 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 the IP-CAN Session between Network Anchor 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 through 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 IP-CAN Bearer set up in the completion 3GPP network, 3GPP AGW sends IP-CAN foundation completion receiveed the response to PCRF, notifies the corresponding IP-CAN Bearer of PCRF to set up completion.

Step 1308, PCRF sends the PCC decision and gives information to Non-3GPP AGW after confirming that completion is set up in corresponding carrying in the 3GPP network, requires the PCEF on the Non-3GPP AGW to delete corresponding PCC Rule;

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

Step 1312, after accomplishing 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 that notice PCRF is corresponding discharges and accomplishes.

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 through 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 accomplishing 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 that notice PCRF is corresponding is accomplished.

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 IP Address, 3GPP AGW Address, APN and RAT Type.Wherein, RAT Type 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-CAN Session 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 through IP-CAN Session and is handed down to 3GPP Network Anchor;

Step 1506; PCRF sets up Indication message according to the IP-CAN Session that receives, and generates corresponding PCC Rule, gives information through 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 the CMIPv4FA 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 through non-3GPP network, between Non-3GPP AGW and Network Anchor, 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 MIPv4Registration Revocation 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-3GPP AGW registration revocation is accomplished;

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 the terminal has dual radio ability, then the terminal participates in the carrying of non-3GPP network and the release flow of related resource are dotted among the figure; In this process; Non-3GPP AGW possibly send agency's broadcasting (Agent Advertisement) and give the terminal, its sequence number (Sequence Number=0), and its CMIPv4FA registration of notice terminal is cancelled.

Step 1612, after accomplishing 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 that notice PCRF is corresponding discharges and accomplishes.

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 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.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;

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

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-3GPP AGW registration revocation is accomplished;

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 the terminal has dual radio ability; Then the terminal participates in the carrying of non-3GPP network and the release flow of related resource are dotted among the figure, in this process; Non-3GPP AGW possibly send Agent Advertisement (Sequence Number=0) and give the terminal, and its CMIPv4FA registration of notice terminal is cancelled.

Step 1710, after accomplishing 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 that notice PCRF is corresponding discharges and accomplishes.

Embodiment nine:

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.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 through IP-CAN Session and is handed down to 3GPP Network Anchor;

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

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

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

Visible by the foregoing description; The method and system of releasing source network resource in a kind of evolvement network handoff procedure of the embodiment of the invention are through in objective network carry to be set up or after setting up, PCRF is through 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 PCC Rule to Target AGW, after Target AGW accomplishes objective network carrying foundation; Send message informing PCRF, trigger PCRF and initiate the process that source network carries release; 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 of PCRF through Target AGW or Network Anchor and carry release flow; Can be based on the switching of 3GPP to non-3GPP network; Also can be based on the switching of non-3GPP, make the terminal after source network switching target network, can in time carry out the release of source network bearing resource to the 3GPP network; Improve the service efficiency of source network bearing resource, reduced the waste of resource.

More than lift preferred embodiment; The object of the invention, technical scheme and advantage have been carried out further explain, and institute it should be understood that the above is merely preferred embodiment of the present invention; Not in order to restriction the present invention; All within spirit of the present invention and principle, 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 said objective network is set up IP access network IP-CAN carrying comprises:

Indication message is set up in the IP-CAN session that strategy in the said PCRF receiving target network and charging enhancement function entity PCEF send, 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; So that the PCC Rule Information that the IP-CAN session foundation that the PCEF on the said objective network issues according to PCRF is carried in receiveing the response is set up IP-CAN and is carried.

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

4. the method for claim 1 is characterized in that, said source network is first communication network; Objective network is the second communication network, said first communication network, and the terminal is under Mobility Management Entity control; Be established to the IP connectivity of data gateway through gateway; Said second communication network, terminal are established to the IP connectivity of data gateway under the control of border IAD, the border IAD is connected through the tunnel with data gateway; Or said source network is the second communication network, and objective network is first communication network.

5. method as claimed in claim 4; It is characterized in that; Said source network is first communication network; Objective network is the second communication network, the decision of said PCRF distributing policy and charging control PCC give information source network IAD or network anchor point, so that carry in said source network IAD or the network anchor point source of release network and related resource comprises:

PCRF sends the PCC decision and gives information to the first communication network IAD after confirming that completion is set up in corresponding carrying in the second communication network, carries the PCEF that requires on the first communication network IAD and deletes corresponding PCC Rule Information;

Give information so that the first communication network IAD receives the PCC decision, send 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.

6. method as claimed in claim 4; It is characterized in that; Said source network is first communication network; Objective network is the second communication network, the decision of said PCRF distributing policy and charging control PCC give information source network IAD or network anchor point, so that carry in said source network IAD or the network anchor point source of release network and related resource comprises:

PCRF sends the PCC decision and gives information to network anchor point after confirming that completion is set up in corresponding carrying in the second communication network, carries the PCEF that requires on the network anchor point and deletes corresponding PCC Rule Information;

So that 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.

7. method as claimed in claim 4; It is characterized in that; Said source network is the second communication network, and objective network is first communication network, and the second communication network moves PMIPv6 based on the agency; The decision of said PCRF distributing policy and charging control PCC give information source network IAD or network anchor point, so that carry in said source network IAD or the network anchor point source of release network and related resource comprises:

PCRF sends the PCC decision and gives information to the second communication network access gateway after confirming that completion is set up in corresponding carrying in first communication network, carries the PCEF that requires on the second communication network access gateway and deletes corresponding PCC Rule Information;

Give information so that the second communication network access gateway receives the PCC decision, send 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.

8. method as claimed in claim 7 is characterized in that, said agent binding update messages comprises that ID and value are set to 0 life cycle parameter.

9. method as claimed in claim 4; It is characterized in that; Said source network is the second communication network, and objective network is first communication network, and the second communication network is based on client mobile IP Foreign Agent CMIPv4FA pattern; The decision of said PCRF distributing policy and charging control PCC give information source network IAD or network anchor point, so that carry in said source network IAD or the network anchor point source of release network and related resource comprises:

So that the second communication network access gateway receives the PCC decision and gives information, and sends the registration revocation message based on CMIPv4 to network anchor point;

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 was receiveed the response, according to the PCC Rule Information of the requirement deletion that receives, the IP-CAN that discharges in the second communication network of network carried.

10. method as claimed in claim 9 is characterized in that, said registration revocation message based on CMIPv4 comprises that ID and value are set to 0 life cycle parameter.

11. method as claimed in claim 9; It is characterized in that; Said second communication network access gateway is according to the PCC Rule Information of the requirement deletion that receives, and the IP-CAN carrying that discharges in the second communication network further comprises: the second communication network access gateway sends to the terminal and acts on behalf of broadcast, and the said sequence number value of acting on behalf of in the broadcast is set to 0; The terminal receives acts on behalf of broadcast, participates in the carrying of second communication network and the release of related resource.

12. the method for claim 1; It is characterized in that; This method further comprises: after said PCRF receives that said source network carries in accomplishing source network and related resource discharges; Source network sends PCC and determines to provide to receive the response, and said PCC decision provides the notice of receiveing the response to delete corresponding PCC rule.

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

14. method as claimed in claim 13; It is characterized in that; Said source network is first communication network; Objective network is the second communication network, the decision of said PCRF distributing policy and charging control PCC the give information IAD or the network anchor point of source network, so that carry in the IAD of said source network or the network anchor point source of release network and related resource comprises:

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.

15. method as claimed in claim 13; It is characterized in that; Said source network is first communication network; Objective network is the second communication network, the decision of said PCRF distributing policy and charging control PCC the give information IAD or the network anchor point of source network, so that carry in the IAD of said source network or the network anchor point source of release network and related resource comprises:

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;

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

16. method as claimed in claim 13; It is characterized in that; Said source network is the second communication network, and objective network is first communication network, and the second communication network is based on PMIPv6; The decision of said PCRF distributing policy and charging control PCC give information source network IAD or network anchor point, so that carry in said source network IAD or the network anchor point source of release network and related resource comprises:

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 the PCC decision and gives information, and sends agent binding update messages to network anchor point;

Second communication network access gateway reception agent binding is receiveed 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.

17., it is characterized in that said agent binding update messages comprises ID and value is set to 0 life cycle parameter like claim 14 or 16 described methods.

18. method as claimed in claim 13; It is characterized in that; Said source network is the second communication network, and objective network is first communication network, and the second communication network is based on the CMIPv4FA pattern; The decision of said PCRF distributing policy and charging control PCC give information source network IAD or network anchor point, so that carry in said source network IAD or the network anchor point source of release network and related resource comprises:

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;

Give information so that the second communication network access gateway receives the PCC decision, send registration revocation message based on CMIPv4 to network anchor point;

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

19. method as claimed in claim 18; It is characterized in that; The step that IP-CAN in the said release second communication network carries further comprises: the second communication network access gateway sends to the terminal and acts on behalf of broadcast; The said sequence number value of acting on behalf of in the broadcast is set to 0, and the terminal receives acts on behalf of broadcast, participates in the carrying of second communication network of network and the release of related resource.

20. 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,

21. 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,