CN101159563B - Method and system for selecting strategy charging control server - Google Patents
Method and system for selecting strategy charging control server Download PDFInfo
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- CN101159563B CN101159563B CN2007101672523A CN200710167252A CN101159563B CN 101159563 B CN101159563 B CN 101159563B CN 2007101672523 A CN2007101672523 A CN 2007101672523A CN 200710167252 A CN200710167252 A CN 200710167252A CN 101159563 B CN101159563 B CN 101159563B
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Abstract
A selection method for a strategy charging control server is provided. When a UE is set to access to an IP-CAN session of a packet data network, an entity where the PCEF is located in a source system selects a PCRF to register and then send a PCRF message associated to the IP-CAN session to an HSS/AAA where the message is stored; when the UE switches the target system, an HSS feedbacks the PCRF message associated to each IP-CAN session related to the UE to the interdependent node of the target system, and the interdependent node, during the reconstruction of the IP-CAN session, determines the PCRF corresponding to the IP-CAN session based on the PCRF information associated to the IP-CAN session, and interacts therewith to obtain the strategy rule. The invention realizes the switch between the 3GPP and non-3GPP IP access systems, and allows each PCRF module in the source system and the target system to find the same PCRF. A 3GPP system for implementing the method is also provided.
Description
Technical field
The present invention relates to 3GPP (3rd Generation Partnership Project, third generation partner program) grouping system of evolution (EPS:Evolved Packet System), the particularly system of selection of this system and policy billing control server.
Background technology
3GPP (3rd Generation Partnership Project, third generation partner program) grouping system of evolution (EPS:Evolved Packet System) is by E-UTRAN (Evolved UniversalTerrestrial Radio Access Network, the universal mobile telecommunications system land radio access web of evolution), MME (Mobility Management Entity, mobile management unit), S-GW (ServingGateway, gateway), P-GW, claim PDN GW (Packet Data Network Gateway again, grouped data network gateway), HSS (Home Subscriber Server, home subscriber server), AAA (the Authentication of 3GPP, Authorization and Accounting, authentication and authorization charging) server, PCRF (Policy and Charging Rules Function, "Policy and Charging Rules Function) entity and other support nodes are formed, also the PCRF entity is called policy billing control server in the literary composition, is abbreviated as PCRF.Wherein MME is responsible for chain of command related works such as the processing of mobile management, Non-Access Stratum signaling and the contextual management of user's mobile management; S-GW is the accessing gateway equipment that links to each other with E-UTRAN, transmits data between E-UTRAN and P-GW, and is responsible for pending datas such as paging are carried out buffer memory.P-GW then is the borde gateway of EPS and PDN (Packet Data Network, packet data network) network, and the access of being responsible for PDN reaches functions such as transmitting data between EPS and PDN.PCRF is the "Policy and Charging Rules Function entity, it is by receiving interface Rx interface and the IP of operator (Internet Protocol, procotol) business network links to each other, obtain business information, it links to each other with gateway device in the network by the S7/S7a/S7b/S7c interface on the other hand, is responsible for initiating the foundation of IP carrying, QoS (the Quality of Service of assurance business datum, and the control of chargeing service quality).
EPS supports the intercommunication with non-3 GPP system.Realize that by the S2a/b/c interface P-GW is as the anchor point between 3GPP and non-3 GPP system with the intercommunication of non-3 GPP system.The system architecture diagram of EPS as shown in Figure 1.Wherein non-3 GPP system is divided into non-3GPP IP access of trusted and the non-3GPP IP access of non-trust (also can be described as trustless non-3GPP IP inserts).The non-3GPP IP of trusted inserts and can directly be connected with P-GW by the S2a interface; The non-3GPP IP of non-trust inserts to be needed to link to each other with P-GW through ePDG (Evolved Packet Data Gateway, the packet data gateway of evolution), and the interface between ePDG and P-GW is S2b.S2c provides subscriber equipment (UE) and user's face relevant control and mobility support between the P-GW.
In traditional 3GPP network, strategy and charge execution function (PCEF:Policy and chargingenforcement function, below be also referred to as the PCEF module) exist only among the P-GW, PCRF passes through S7 interface (as shown in Figure 1) exchange message as long as be connected the control that can finish all functions with P-GW between PCRF and P-GW.But, after the 3GPP network provides IWF with non-3GPP, interface when between P-GW and S-GW is based on PMIP (Proxy Mobile IP, proxy-mobile IP) time, the funtion part of PCEF has been moved among the S-GW, such as the binding function etc. of carrying, between S-GW and the PCRF by S7c interface (as shown in Figure 1) exchange message.When non-3 GPP system inserted by intercommunication between S2a/S2b interface and 3GPP system, the also function of resident part PCEF in the non-3 GPP system was as ePDG and trusted non-3 GPP access network pass.When non-3 GPP system is connecting system trusty, pass through S7a interface (as shown in Figure 1) exchange message between PCRF and non-3 GPP system; When non-3 GPP system is the connecting system of non-trust, pass through S7b interface (as shown in Figure 1) exchange message between PCRF and non-3 GPP system.
In traditional 3GPP network, decide the corresponding relation of P-GW (or GGSN) and PCRF usually by fixed configurations.In the EPS system, P-GW and PCRF have fixed correspondence, and a P-GW has a plurality of PCRF provides service for it.When UE switched between 3GPP system and non-3 GPP system, UE may need to rebuild IP according to the rule of the PCC (policy and charging control) in origin system in goal systems and connect Access Network (IP-CAN:IP ConnectivityAccess Networks) session.Because the corresponding a plurality of PCRF of P-GW possibility, how finding original selected PCRF after switching is a problem that waits to solve.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of system of selection of policy billing control server is provided, be applied to 3GPP system and this system core net and adopt the EPS framework, make that each the PCEF module in origin system and goal systems can find same PCRF when switching between 3GPP and non-3GPPIP connecting system.The present invention also will provide a kind of 3GPP system that realizes said method.
For addressing the above problem, the present invention proposes a kind of system of selection of policy billing control server, described policy billing control server is the grouping system framework that PCRF is positioned at the core net employing evolution of 3GPP system and this 3GPP system, the method comprising the steps of:
When (a) user equipment (UE) is established to the IP connection Access Network IP-CAN session of a certain packet data network, after strategy and charge execution function module PCEF place entity selection one PCRF register in the origin system, by strategy and charge execution function module PCEF place entity or selected PCRF in the described origin system PCRF information of described IP-CAN session association is sent to home subscriber server HSS and/or authentication and authorization charging server AAA, described preservation this information HSS and/or AAA preserve this information, and HSS obtains described PCRF information from AAA;
When (b) described UE switches to goal systems, the PCRF information of each IP-CAN session association that described HSS is relevant with described UE turns back to the interdependent node of goal systems, described interdependent node is in the process of rebuilding described IP-CAN session, determine the PCRF of described IP-CAN session correspondence according to the PCRF information of described IP-CAN session association, mutual with it acquisition strategy rule.
Further, above-mentioned system of selection also can have following characteristics:
In the step (a), the PCRF information of described IP-CAN session association is sent to described HSS, has increased by an interface that transmits the PCRF related information between then described PCRF and the described HSS by selected PCRF.
Further, above-mentioned system of selection also can have following characteristics:
Insert from described 3GPP system before described UE switches, in attaching process, the described PCEF in the origin system goes up resident PCEF for the grouped data network gateway P-GW that selects described PCRF; By this P-GW or selected PCRF the PCRF information of IP-CAN session association is sent to described HSS then.
Further, above-mentioned system of selection also can have following characteristics:
Described UE switches to the system that the non-3GPP of trusted inserts from described 3GPP system, in access authentication procedure, described HSS closes the related information of the address return the P-GW that connects at UE described in the 3GPP system and all IP-CAN sessions relevant with UE to the trusted non-3 GPP access network, and described related information comprises PCRF information;
After the attaching process of layer 3 is triggered, described trusted non-3 GPP access network closes according to the UE sign PCRF information related with the IP address search of P-GW, determine the sign of the selected PCRF of each IP-CAN session relevant in the origin system with this UE, find selected PCRF in the origin system according to this PCRF sign, mutual with it acquisition strategy rule, described P-GW then finds selected PCRF in the origin system according to the PCRF sign of preserving, mutual with it acquisition strategy rule.
Further, above-mentioned system of selection also can have following characteristics:
Described UE switches to the system that the non-3GPP of non-trust inserts from described 3GPP system, in access authentication procedure, described HSS returns the address of the P-GW that connects at UE described in the 3GPP system and the related information of all IP-CAN sessions relevant with UE to the packet data gateway ePDG of evolution, and described related information comprises PCRF information;
Described ePDG is according to the UE sign PCRF information related with the IP address search of P-GW, determine the sign of the selected PCRF of each IP-CAN session relevant in the origin system with this UE, find selected PCRF in the origin system according to this PCRF sign, mutual with it acquisition strategy rule, described P-GW then finds selected PCRF in the origin system according to the PCRF sign of preserving, mutual with it acquisition strategy rule.
Further, above-mentioned system of selection also can have following characteristics:
Before switching, described UE inserts from the system that the non-3GPP of trusted inserts, in attaching process, described PCEF in the origin system goes up resident PCEF for the grouped data network gateway P-GW that selects described PCRF, perhaps shuts resident PCEF for the trusted non-3 GPP access network of selecting described PCRF; Close by described P-GW, described trusted non-3 GPP access network then or selected PCRF sends to HSS and/or AAA with the PCRF information of IP-CAN session association, described HSS preserves this information and/or AAA preserves this information, and HSS obtains described PCRF information from AAA; When not being described P-GW when selecting PCRF, described P-GW needs obtain the PCRF information of described IP-CAN session association from described HSS.
Further, above-mentioned system of selection also can have following characteristics:
Before switching, described UE inserts from the system that the non-3GPP of non-trust inserts, in attaching process, described PCEF in the origin system goes up resident PCEF for the grouped data network gateway P-GW that selects described PCRF, perhaps is to select the packet data gateway ePDG of the evolution of described PCRF to go up resident PCEF; By described P-GW, described ePDG or selected PCRF the PCRF information of IP-CAN session association is sent to HSS and/or AAA then, described HSS preserves this information and/or AAA preserves this information, HSS obtains described PCRF information from AAA, when not being described P-GW when selecting PCRF, described P-GW needs obtain the PCRF information of described IP-CAN session association from described HSS.
Further, above-mentioned system of selection also can have following characteristics:
Described UE switches to described 3GPP system from the system that described non-3GPP inserts, pass through in the user data insertion process of back in the 3GPP authentication, the related information of the address of the P-GW that described HSS connects UE in the subscription data of UE, the 3GPP system and all the IP-CAN sessions relevant with UE, described related information comprises PCRF information, sends to mobile management unit MME;
Described MME is according to the UE sign PCRF information related with the IP address search of P-GW, determine the sign of the selected PCRF of each IP-CAN session relevant in the origin system with this UE, MME selects a S-GW, and the sign of described PCRF is sent to the S-GW of selection, described S-GW finds selected PCRF in the origin system according to described PCRF sign, mutual with it acquisition strategy rule; Described P-GW then finds selected PCRF in the origin system according to the PCRF sign of preserving, mutual with it acquisition strategy rule.
Further, above-mentioned system of selection also can have following characteristics:
Described P-GW obtains described IP-CAN session association from described HSS PCRF information may further comprise the steps:
Described P-GW sends the request of PCRF related information to HSS and/or AAA, described HSS preserves this PCRF related information and/or AAA preserves this PCRF related information, HSS obtains described PCRF related information from AAA, carry UE sign and Care-of Address CoA, described P-GW is the home address HoA that UE distributes, the address of P-GW;
Described HSS and/or AAA determine the PCRF sign of this IP-CAN according to UE sign and Care-of Address CoA, and the address of HoA and P-GW is added in the related information of this IP-CAN session, and return PCRF related information response to P-GW, carry the PCRF sign in this response message.
Further, above-mentioned system of selection also can have following characteristics:
Described IP-CAN session is determined according to the home address of the sign of UE and UE is unique; Perhaps unique definite according to sign and the APN of UE; Perhaps determine according to the address of the sign of UE and grouped data network gateway P-GW is unique.
Further, above-mentioned system of selection also can have following characteristics:
The PCRF information of described IP-CAN session association is included in and sends to described HSS and/or AAA in the five-tuple, and this five-tuple comprises UE sign, APN, P-GW address, HoA and PCRF sign; Perhaps
The PCRF information of described IP-CAN session association is included in and sends to described HSS and/or AAA in the tlv triple, and this tlv triple comprises UE sign, Care-of Address CoA and PCRF sign;
Described HSS preserves this PCRF related information and/or AAA preserves this PCRF related information, and HSS obtains described PCRF related information from AAA.
A kind of core net provided by the invention adopts the 3GPP system of the grouping system framework of evolution, comprise policy billing control server PCRF, home subscriber server HSS, authentication and authorization charging server AAA, grouped data network gateway P-GW, the packet data gateway ePDG of evolution and mobile management unit MME, and:
Increased the interface of a transmission PCRF related information between described PCRF and the described HSS;
Described PCRF is used for being established at user equipment (UE) the IP connection Access Network IP-CAN conversation procedure of packet data network, behind the related news of the session foundation that strategy and charge execution function module PCEF place entity send in receiving native system or non-3 GPP system, the PCRF information of described IP-CAN session association is sent to home subscriber server HSS by described interface;
Described HSS is used for when described UE switches to goal systems, and the PCRF information of each IP-CAN session association that described UE is relevant turns back to the interdependent node of goal systems.
Further, above-mentioned 3GPP system also can have following characteristics:
Described PCRF is after Indication message is set up in the IP-CAN session of receiving the P-GW transmission, and the relevant policy and charging control strategy of CAMEL-Subscription-Information decision carrying according to UE sends IP to described P-GW
Acknowledge message is set up in the CAN session, and the information of this PCRF is sent to HSS registers; Perhaps
Described PCRF is after receiving the gateway control session foundation request that the trusted non-3 GPP access network closes or ePDG sends, CAMEL-Subscription-Information decision qos policy rule according to UE, set up acknowledge message by gateway control session and send to described trusted non-3 GPP access network pass or ePDG, and the information of this PCRF sent to that HSS registers and/or the information of this PCRF is sent to AAA and register, HSS obtains described PCRF information from AAA.
Further, above-mentioned 3GPP system also can have following characteristics:
Described HSS be used for UE from described 3GPP system switch to system that non-3GPP inserts in access authentication procedure, close or the packet data gateway ePDG of evolution returns the related information of the address of the P-GW that connects at UE described in the 3GPP system all the IP-CAN sessions relevant with UE to the trusted non-3 GPP access network, the related information of described IP-CAN session comprises PCRF information.
Further, above-mentioned 3GPP system also can have following characteristics:
Described HSS is used for the user data insertion process after UE switches to described 3GPP system from the system that described non-3GPP inserts authentication is passed through, the related information of all IP-CAN sessions that the address of the P-GW that UE in the subscription data of UE and the 3GPP system is connected is relevant with UE sends to MME, and the related information of described IP-CAN session comprises PCRF information.
Use the method for the invention, can be so that when between 3GPP and non-3GPP IP connecting system, switching, each the PCEF module in origin system and goal systems can find same PCRF.
Description of drawings
Fig. 1 is the system architecture diagram of EPS, and wherein non-trust non-3 GPP access network needs ePDG on data path.
Fig. 2 A and Fig. 2 B are the flow charts of the embodiment of the invention one and embodiment two.
Fig. 3 A and Fig. 3 B are the flow charts of the embodiment of the invention three and embodiment four.
Fig. 4 A and Fig. 4 B are the flow charts of the embodiment of the invention five and embodiment six.
Fig. 5 A and Fig. 5 B are the flow charts of the embodiment of the invention seven and embodiment eight.
Fig. 6 A and Fig. 6 B are the flow charts of the embodiment of the invention nine and embodiment ten.
Fig. 7 is the schematic diagram of the interface that increases between HSS and PCRF of the present invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Embodiment one
What present embodiment was described is as UE (User Equipment, subscriber equipment) is in the 3GPP coverage, and what the 3GPP core net adopted is the EPS framework, interface protocol among the EPS between S-GW and P-GW is during based on PMIPv6, UE switches to non-3GPP IP Access Network to the attaching process and the UE of this system from the 3GPP system, and non-3 GPP access network is the trusted non-3 GPP access network, the attaching process when adopting the PMIPv6 agreement to insert.
UE will be established to the IP-CAN session of a certain PDN in the attaching process of 3GPP, P-GW selects PCRF, and the related information of this IP-CAN session sent to HSS, the related information of IP-CAN session comprises related PCRF information, can be that a shape is as (UE sign, APN (APN), P-GW address, HoA, PCRF sign) five-tuple.UE is in the access authentication procedure of non-3GPP, and HSS closes for the trusted non-3 GPP access network according to the PCRF information that the sign of UE is returned all IP-CAN session associations relevant with this UE.When goal systems was rebuild the IP-CAN session, the trusted non-3 GPP access network closed and obtains the pairing PCRF of IP-CAN session according to the sign of UE and the address search PCRF related information of P-GW, mutual with it acquisition strategy rule.
The detail flowchart of present embodiment is shown in Fig. 2 A, and each step is described below:
Step 202, UE send Attach Request message to MME;
Step 204, MME initiate the identifying procedure to UE, exchange authentication-related information between MME and the HSS as required; Behind the authentication success, MME initiates more new technological process of position, and HSS sends to MME with the subscription data of UE.In verification process, HSS sends to MME with the selection information of P-GW, and MME selects S-GW and P-GW;
" request information is set up in carrying, has the IP address of qos policy, APN and the P-GW of required foundation carrying in this message to the S-GW transmission for step 206, MME;
Step 208, S-GW send " agent binding update " request to P-GW, carry sign such as NAI (network access Identifier) or IMSI (the International Mobile SubscriberIdentity of UE in this message, the international mobile subscriber identity), the qos policy and the APN of required foundation carrying;
Step 210, P-GW select PCRF according to APN, and P-GW sends " indication is set up in IP CAN session " message to PCRF, carry the relevant QoS strategy of sign, HoA and this carrying of this UE in the message.Policy and charging control (PCC) strategy that PCRF is correlated with according to the CAMEL-Subscription-Information decision carrying of UE, and to P-GW transmission " IP CAN session is set up and confirmed " message;
Step 212, P-GW send to HSS with the related information of IP-CAN session and register, related information comprises the sign of UE, APN, the address of P-GW, P-GW is the home address HoA that UE distributes, and P-GW is the sign of the PCRF of this IP-CAN session selection, and the sign of PCRF can be the IP address of PCRF, also can be the FQDN (Full Quality Domain Name, character domain name fully) of PCRF;
Step 214, P-GW send " agent binding affirmation ", the address of carrying sign, HoA and the PCRF of UE in the message to S-GW;
Step 216, S-GW send " gateway control session foundation " message to same PCRF, and message is carried sign and the HoA of this UE.PCRF is associated the IP-CAN session that S-GW registered according to sign and the HoA of UE with the session that P-GW is registered.The qos policy that PCRF is relevant with this session brings S-GW by " gateway control session is set up and confirmed " message;
Step 218, S-GW send carrying to MME and set up affirmation;
Step 220, MME initiate to set up radio bearer, and notice UE adheres to successfully;
Step 222, MME initiate bearer update, and radio bearer information is sent to S-GW;
Set up RAB between step 224, UE and the S-GW, set up the PMIPv6 tunnel between S-GW and the P-GW;
Below be handoff procedure:
Step 226, UE find the non-3GPP connecting system of trusted and initiate to switch;
Step 228, UE carry out access authentication in non-3GPP connecting system, HSS/AAA (refers to HSS and/or AAA, Wen Zhongjun is herewith) UE is carried out access authentication, HSS closes (can pass through AAA) to the trusted non-3 GPP access network and returns the related information of the address of the P-GW of UE connection in the 3GPP system all the IP-CAN sessions relevant with UE and comprise PCRF information;
The attaching process of step 230, layer 3 is triggered;
Step 232, trusted non-3 GPP access network close the PCRF information according to the IP address search association of UE sign, P-GW, determine the sign of the selected PCRF of each IP-CAN session relevant with this UE in the origin system.The trusted non-3 GPP access network closes to P-GW and sends " agent binding update " request, the sign of carrying UE in the message;
Step 234, P-GW find selected PCRF in the origin system according to the PCRF sign of preserving.P-GW sends " IP-CAN session modification " request message to PCRF, carries sign and the HoA of UE in the message.PCRF brings P-GW with UE relevant PCC strategy in origin system by " affirmation of IP-CAN session modification " message according to sign and the HoA of UE;
Step 236, P-GW close to the trusted non-3 GPP access network and send the Binding Update response;
Step 238, trusted non-3 GPP access network close according to the PCRF sign and find selected PCRF in the origin system, and send " gateway control and QoS rule request " message to PCRF, carry sign and the HoA of UE in the message.PCRF brings UE relevant qos policy in origin system the trusted non-3 GPP access network and closes by " gateway control and the response of QoS rule " message according to sign and the HoA of UE;
Step 240, layer 3 attaching process are finished;
PMIPv6 tunnel between step 242, trusted non-3 GPP access network pass and the P-GW is set up and is finished, and the IP-CAN session is rebuild and finished.
Embodiment two
The sight that present embodiment is described is identical with embodiment one.Also be to describe as UE (User Equipment, subscriber equipment) is in the 3GPP coverage, and what the 3GPP core net adopted is the EPS framework, interface protocol among the EPS between S-GW and P-GW is during based on PMIPv6, UE switches to non-3GPP IP Access Network to the attaching process and the UE of this system from the 3GPP system, and non-3 GPP access network is the trusted non-3 GPP access network, the attaching process when adopting the PMIPv6 agreement to insert.
Difference is that UE will be established to the IP-CAN session of a certain PDN in the attaching process of 3GPP, and P-GW selects PCRF, is by selected PCRF subsequently but not P-GW sends to HSS with the PCRF related information of this IP-CAN session.For this reason, need between PCRF and HSS, increase by one and transmit the interface of PCRF related information as being called Sr interface, as shown in Figure 7.
What the flow chart of present embodiment was shown in Fig. 2 B, except that step 212 becomes following step 212 ', the description of other step is identical with Fig. 2 A, wherein step 212 ' is described below:
Step 212 ', PCRF sends to HSS with the related information of IP-CAN session and registers, related information comprises the sign of UE, APN, the address of P-GW, P-GW is the home address HoA that UE distributes, and P-GW is the sign of the PCRF of this IP-CAN session selection, and the sign of PCRF can be the IP address of PCRF, also can be the FQDN (Full Quality Domain Name, character domain name fully) of PCRF.
Embodiment three
What present embodiment was described is to be in the 3GPP coverage as UE, and what the 3GPP core net adopted is the EPS framework, interface protocol among the EPS between S-GW and P-GW is during based on PMIPv6, UE switches to non-3GPP IP Access Network to the attaching process and the UE of this system from the 3GPP system, and non-3 GPP access network is non-trust non-3 GPP access network, the attaching process when adopting the PMIPv6 agreement to insert.
UE will be established to the IP-CAN session of a certain PDN in the attaching process of 3GPP, P-GW selects PCRF, and the related information of this IP-CAN session is sent to HSS.UE is in the access authentication procedure of non-3GPP, and HSS gives ePDG according to the PCRF information that the sign of UE is returned all IP-CAN session associations relevant with this UE.EPDG obtains the pairing PCRF of IP-CAN session according to the sign of UE and the related PCRF information of address search of P-GW, mutual with it acquisition strategy rule.
The flow chart of present embodiment as shown in Figure 3A, each step of flow process is described below:
Step 302, UE send Attach Request message to MME;
Step 304, MME initiate the identifying procedure to UE, exchange authentication-related information between MME and the HSS as required; Behind the authentication success, MME initiates more new technological process of position, and HSS sends to MME with the subscription data of UE.In verification process, HSS sends to MME with the selection information of P-GW; MME selects S-GW and P-GW;
" request information is set up in carrying, has the IP address of qos policy, APN and the P-GW of required foundation carrying in this message to the S-GW transmission for step 306, MME;
Step 308, S-GW send " agent binding update " request to P-GW, the sign of carrying UE in this message, the qos policy and the APN of required foundation carrying;
Step 310, P-GW select PCRF according to APN, and P-GW sends " indication is set up in the IP-CAN session " message to PCRF, carry the sign QoS strategy relevant with HoA and this carrying of this UE in the message.The PCC strategy that PCRF is correlated with according to the CAMEL-Subscription-Information decision carrying of UE, and to P-GW transmission " the IP-CAN session is set up and confirmed " message;
Step 312, P-GW send to HSS with the related information of IP-CAN session and register, related information comprises the sign of UE, APN, the address of P-GW, P-GW is the home address HoA that UE distributes, P-GW is the sign of the PCRF of this IP-CAN session selection, and the sign of PCRF can be the IP address of PCRF, also can be the FQDN of PCRF;
Step 314, P-GW send " agent binding affirmation ", the address of carrying sign, HoA and the PCRF of UE in the message to S-GW;
Step 316, S-GW send " gateway control session foundation " message to same PCRF, and message is carried sign and the HoA of this UE.PCRF is associated the IP-CAN session that S-GW registered according to UE sign and HoA with the session that P-GW is registered.The qos policy that PCRF is relevant with this session brings S-GW by " gateway control session is set up and confirmed " message;
Step 318, S-GW send carrying to MME and set up affirmation;
Step 320, MME initiate to set up radio bearer, and notice UE adheres to successfully;
Step 322, MME initiate bearer update, and radio bearer information is sent to S-GW;
Set up RAB between step 324, UE and the S-GW, set up the PMIPv6 tunnel between S-GW and the P-GW;
Below be to want handoff procedure:
Step 326, UE find the non-3GPP connecting system of non-trust and initiate to switch;
Carry out IKE (Internet Key Exchange between step 328, UE and ePDG, cipher key change) consults, ePDG authenticates UE, the security information of ePDG and HSS/AAA (referring to HSS and/or AAA) exchange UE and CAMEL-Subscription-Information, authorization message etc., HSS comprises PCRF information to the related information that ePDG returns (can pass through AAA) all IP-CAN sessions that the address of P-GW of UE connection is relevant with UE in the 3GPP system;
Step 330, ePDG are determined the sign of the selected PCRF of each IP-CAN session relevant with this UE in the origin system according to the PCRF information of the IP address search association of UE sign, P-GW.EPDG sends " agent binding update " request, the sign of carrying UE in the message to P-GW;
Step 332, P-GW find selected PCRF in the origin system according to the PCRF sign of preserving.P-GW sends " IP-CAN session modification " request message to PCRF, carries sign and the HoA of UE in the message.PCRF brings P-GW with UE relevant PCC strategy in origin system by " affirmation of IP-CAN session modification " message according to sign and the HoA of UE;
Step 334, P-GW send " agent binding affirmation " message to ePDG;
Step 336, ePDG find selected PCRF in the origin system according to the PCRF sign, and send " gateway control and QoS rule request " message to PCRF, carry sign and the HoA of UE in the message.PCRF brings ePDG with UE relevant qos policy in origin system by " gateway control and the response of QoS rule " message according to sign and the HoA of UE;
Finish the flow process of setting up in IPSEC tunnel between step 338, ePDG and UE;
Set up ipsec tunnel between step 340, UE and the ePDG, set up the PMIPv tunnel between ePDG and the P-GW.
Embodiment four
The sight that present embodiment is described is identical with embodiment three.Also be to describe UE to be in the 3GPP coverage, and what the 3GPP core net adopted is the EPS framework, interface protocol among the EPS between S-GW and P-GW is during based on PMIPv6, UE switches to non-3GPP IP Access Network to the attaching process and the UE of this system from the 3GPP system, and non-3 GPP access network is non-trust non-3 GPP access network, the attaching process when adopting the PMIPv6 agreement to insert.
Difference is that UE will be established to the IP-CAN session of a certain PDN in the attaching process of 3GPP, after P-GW selects PCRF, by selected PCRF but not P-GW sends to HSS with the PCRF related information of this IP-CAN session.For this reason, need between PCRF and HSS, increase the interface Sr of a transmission PCRF related information, as shown in Figure 7.
What the flow chart of present embodiment was shown in Fig. 3 B, except that step 312 becomes following step 312 ', the description of other step is identical with Fig. 3 A, wherein step 312 ' is described below:
Step 312 ', PCRF sends to HSS with the related information of IP-CAN session and registers, related information comprises the sign of UE, APN, the address of P-GW, P-GW is the home address HoA that UE distributes, P-GW is the sign of the PCRF of this IP-CAN session selection, and the sign of PCRF can be the IP address of PCRF, also can be the FQDN of PCRF.
Embodiment five
What present embodiment was described is to be in the non-3GPP coverage of non-trust as UE, and what the 3GPP core net adopted is the EPS framework, attaching process and UE when UE adopts the PMIPv6 agreement to insert switch to the 3GPP network from non-3 GPP access network, and the attaching process of the interface protocol between S-GW and P-GW during based on PMIPv6.
UE will be established to the IP-CAN session of a certain PDN in the attaching process of non-3GPP, P-GW selects PCRF, and the related information of this IP-CAN session is sent to HSS/AAA.UE is in the user data insertion process of 3GPP, and HSS gives MME according to the PCRF information that the sign of UE is returned all IP-CAN session associations relevant with UE.MME obtains the pairing PCRF of IP-CAN session according to the PCRF information of UE sign and the described IP-CAN session association of P-GW address search, and mutual with it acquisition strategy rule is to rebuild the IP-CAN session.
The flow chart of present embodiment is shown in Fig. 4 A, and each step is described below:
Carry out IKE (Internet Key Exchange between step 402, UE and ePDG, cipher key change) consults, ePDG authenticates UE, the security information of ePDG and HSS/AAA exchange UE and CAMEL-Subscription-Information, authorization message etc., HSS/AAA is that UE distributes P-GW, and the IP address of P-GW is sent to ePDG;
Step 404, ePDG send " agent binding update " request to P-GW, carry information such as the sign of UE and APN in this message;
Step 406, P-GW are that PCRF is selected in this IP-CAN session according to APN, and P-GW sends " indication is set up in the IP-CAN session " message to PCRF, carry sign and the HoA of this UE in the message.PCRF determines the PCC strategy according to the CAMEL-Subscription-Information of UE, and sends " IP CAN session is set up and confirmed " message to P-GW;
Step 408, P-GW register the IP address of this P-GW to HSS/AAA;
The related information of IP-CAN session is sent to HSS for step 410, P-GW and/or AAA registers, related information comprises the sign of UE, APN, the P-GW address, P-GW is the home address HoA that UE distributes, P-GW is the sign of the PCRF of this IP-CAN session selection, and the sign of PCRF can be the IP address of PCRF, also can be the FQDN of PCRF;
Step 412, P-GW send agent binding to ePDG and confirm the address of carrying sign, HoA and the PCRF of UE in the message;
Step 414, ePDG send " gateway control session foundation " message to same PCRF, and message is carried sign and the HoA of this UE.PCRF is associated the IP-CAN session that ePDG registered according to UE sign and HoA with the session that P-GW is registered.The qos policy that PCRF is relevant with this session brings ePDG by " gateway control session is set up and confirmed " message;
Finish the flow process of setting up in IPSEC tunnel between step 416, ePDG and UE;
Set up ipsec tunnel between step 418, UE and the ePDG, set up the PMIPv6 tunnel between ePDG and the P-GW;
Below be handoff procedure:
Step 420, UE find the 3GPP connecting system and initiate to switch;
Step 422, UE send Attach Request message to MME;
Step 424, MME initiate the identifying procedure to UE, MME and HSS exchange authentication information;
Step 426, MME initiate more new technological process of position, the related information of all IP-CAN sessions that the address of the P-GW that HSS connects UE in the subscription data of UE and the 3GPP system is relevant with UE comprises that PCRF information sends to MME, and described PCRF information is kept on the HSS or HSS also can obtain from AAA;
Step 428, MME are determined the sign of the selected PCRF of each IP-CAN session relevant with this UE in the origin system according to the PCRF information of the IP address search association of UE sign, P-GW.MME selects a S-GW, and sends carrying to it and set up request message, carries address and the sign of corresponding PCRF with it of sign, HoA, the P-GW of UE in the message;
Step 430, S-GW send " agent binding update " request, the sign of carrying UE in this message to P-GW;
Step 432, P-GW find selected PCRF in the origin system according to the PCRF sign of preserving.P-GW sends " IP-CAN session modification " request message to PCRF, carries sign and the HoA of UE in the message.PCRF brings P-GW with UE relevant PCC strategy in origin system by " affirmation of IP CAN session modification " message according to sign and the HoA of UE;
Step 434, P-GW send " agent binding affirmation " message to S-GW;
Step 436, S-GW find selected PCRF in the origin system according to the PCRF sign, and send " gateway control and QoS rule request " message to PCRF, carry sign and the HoA of UE in the message.PCRF brings S-GW with UE relevant qos policy in origin system by " gateway control and the response of QoS rule " message according to sign and the HoA of UE;
Step 438, S-GW send carrying to MME and set up response;
Step 440, RAB are set up;
Set up RAB between step 442, UE and the S-GW, set up the PMIPv6 tunnel between S-GW and the P-GW.
Embodiment six
Present embodiment is identical with embodiment five, what describe also is to be in the non-3GPP coverage of non-trust as UE, and what the 3GPP core net adopted is the EPS framework, attaching process and UE when UE adopts the PMIPv6 agreement to insert switch to the 3GPP network from non-3 GPP access network, and the attaching process of the interface protocol between S-GW and P-GW during based on PMIPv6.
Difference is that UE will be established to the IP-CAN session of a certain PDN in the attaching process of non-3GPP, after P-GW selects PCRF, by selected PCRF but not P-GW sends to HSS/AAA with the PCRF related information of this IP-CAN session.For this reason, need between PCRF and HSS, increase the interface Sr of a transmission PCRF related information, as shown in figure 10.
What the flow chart of present embodiment was shown in Fig. 4 B, except that step 410 becomes following step 410 ', the description of other step is identical with Fig. 3 A, wherein step 410 ' is described below:
410 ', selected PCRF sends to HSS/AAA with the related information of session and registers, related information comprises the sign of UE, APN, the P-GW address, P-GW is the home address HoA that UE distributes, P-GW is the sign of the PCRF of this IP-CAN session selection, and the sign of PCRF can be the IP address of PCRF, also can be the FQDN of PCRF.
Embodiment seven
What present embodiment was described is to be in the 3GPP coverage as UE, and what the 3GPP core net adopted is the EPS framework, interface protocol among the EPS between S-GW and P-GW is during based on PMIPv6, UE switches to non-3GPP IP Access Network to the attaching process and the UE of this system from the 3GPP system, and non-3 GPP access network is the trusted non-3 GPP access network, the attaching process when adopting the DSMIPv6 agreement to insert.
UE will be established to the IP-CAN session of a certain PDN in the attaching process of 3GPP, P-GW selects PCRF, and the related information of this IP-CAN session is sent to HSS.The related information of IP-CAN session comprises PCRF information, can be the five-tuple of a shape as (UE sign, APN, P-GW address, HoA, PCRF sign).UE is in the access authentication procedure of non-3GPP, and HSS closes for the trusted non-3 GPP access network according to the PCRF information that the sign of UE is returned all IP-CAN session associations relevant with this UE.The trusted non-3 GPP access network closes when rebuilding the IP-CAN session, obtains the pairing PCRF of IP-CAN session according to the sign of UE and the related PCRF information of address search of P-GW, mutual with it acquisition strategy rule.
The flow chart of present embodiment is shown in Fig. 5 A, and each step is described below:
Step 502, UE send Attach Request message to MME;
Step 504, MME initiate the identifying procedure to UE, exchange authentication-related information between MME and the HSS as required; Behind the authentication success, MME initiates more new technological process of position, and HSS sends to MME with the subscription data of UE.In verification process, HSS sends to MME with the selection information of P-GW; MME selects S-GW and P-GW;
" request information is set up in carrying, has the IP address of qos policy, APN and the P-GW of required foundation carrying in this message to the S-GW transmission for step 506, MME;
Step 508, S-GW send " agent binding update " request to P-GW, the sign of carrying UE in this message, the qos policy and the APN of required foundation carrying;
Step 510, P-GW select PCRF according to APN, and P-GW sends " indication is set up in the IP-CAN session " message to PCRF, carry sign and the HoA of this UE in the message, and the relevant qos policy of this carrying.The PCC strategy that PCRF is correlated with according to the CAMEL-Subscription-Information decision carrying of UE, and to P-GW transmission " the IP-CAN session is set up and confirmed " message;
Step 512, P-GW send to HSS with the related information of IP-CAN session and register, related information comprises the sign of UE, APN, the address of P-GW, P-GW is the home address HoA that UE distributes, P-GW is the sign of the PCRF of this IP-CAN session selection, and the sign of PCRF can be the IP address of PCRF, also can be the FQDN of PCRF;
Step 516, S-GW send " gateway control session foundation " message to same PCRF, and message is carried sign and the HoA of this UE.PCRF is associated the IP-CAN session that S-GW registered according to UE sign and HoA with the session that P-GW is registered.The qos policy that PCRF is relevant with this session brings S-GW by " gateway control session is set up and confirmed " message;
Step 518, S-GW send carrying to MME and set up affirmation;
Step 520, MME initiate to set up radio bearer, and notice UE adheres to successfully;
Step 522, MME initiate bearer update, and radio bearer information is sent to S-GW;
Set up RAB between step 524, UE and the S-GW, set up the PMIPv6 tunnel between S-GW and the P-GW;
Above process is identical with embodiment one, because be to adopt the DSMIPv6 agreement to insert, following handoff procedure is different:
Step 526, UE find the non-3GPP connecting system of trusted and initiate to switch;
Step 528, UE carry out access authentication and mandate in non-3GPP connecting system.The non-3GPP of 3GPP aaa server authentication UE inserts, and HSS related information from all the IP-CAN sessions relevant with UE of the address of returning the P-GW that UE connects in the 3GPP system to the trusted non-3 GPP access network that close comprises the PCRF information of association simultaneously;
Step 530, UE execution level 3 adhere to, and obtain the local address as its Care-of Address CoA;
Step 532, trusted non-3 GPP access network close according to the UE sign searches related PCRF information, determines the selected PCRF of each IP-CAN session relevant with this UE in the origin system.The trusted non-3 GPP access network closes to each PCRF and sends " indication is set up in the IP-CAN session " message, the sign of carrying UE in the message, and PCRF returns " the IP-CAN session is set up and confirmed " message;
Step 536, UE send the DSMIPv6 binding update messages to each P-GW, register its Care-of Address CoA;
Step 538, P-GW find selected PCRF in the origin system according to the PCRF sign of preserving.P-GW sends " IP-CAN session modification " request message to PCRF, carries sign and the HoA of UE in the message.PCRF brings P-GW with UE relevant PCC strategy in origin system by " affirmation of IP-CAN session modification " message according to sign and the HoA of UE;
Step 540, P-GW send DSMIPv6 binding acknowledgement message to UE;
Set up the DSMIPv6 tunnel between step 542, UE and the P-GW.
Embodiment eight
Present embodiment is identical with the 7th embodiment, what describe is to be in the 3GPP coverage as UE, and what the 3GPP core net adopted is the EPS framework, interface protocol among the EPS between S-GW and P-GW is during based on PMIPv6, UE switches to non-3GPPIP Access Network to the attaching process and the UE of this system from the 3GPP system, and non-3 GPP access network is the trusted non-3 GPP access network, the attaching process when adopting the DSMIPv6 agreement to insert.
Difference is that UE will be established to the IP-CAN session of a certain PDN in the attaching process of 3GPP, after P-GW selects PCRF, by selected PCRF but not P-GW sends to HSS with the PCRF related information of this IP-CAN session.For this reason, need between PCRF and HSS, increase the interface Sr of a transmission PCRF related information, as shown in figure 10.
What the flow chart of present embodiment was shown in Fig. 5 B, except that step 512 becomes following step 512 ', the description of other step is identical with Fig. 5 A, wherein step 512 ' is described below:
Step 512 ', PCRF sends to HSS with the related information of IP-CAN session and registers, related information comprises the sign of UE, APN, the address of P-GW, P-GW is the home address HoA that UE distributes, P-GW is the sign of the PCRF of this IP-CAN session selection, and the sign of PCRF can be the IP address of PCRF, also can be the FQDN of PCRF.
Embodiment nine
What present embodiment was described is to be in the non-3GPP coverage of trusted as UE, and what the 3GPP core net adopted is the EPS framework, attaching process and UE when UE adopts the DSMIPv6 agreement to insert switch to the 3GPP system from non-3GPP IP Access Network, the attaching process of the interface protocol in the 3GPP system between S-GW and P-GW during based on PMIPv6.
UE will be established to the IP-CAN session of a certain PDN in the attaching process of non-3GPP, the trusted non-3 GPP access network closes selects PCRF, and the related information of this IP-CAN session is sent to HSS/AAA.The related information of IP-CAN session can be the tlv triple of a shape as (UE sign, Care-of Address CoA, PCRF sign).UE is in the user data insertion process of 3GPP, and HSS gives MME according to the PCRF information that the sign of UE is returned all IP-CAN session associations relevant with UE.MME obtains the pairing PCRF of IP-CAN session according to the PCRF information of UE sign and the described IP-CAN session association of P-GW address search, and mutual with it acquisition strategy rule is to rebuild the IP-CAN session.
The flow chart of present embodiment as shown in Figure 6A, each step is described below:
Step 602, layer 2 insert, and HSS/AAA carries out the access authentication mandate to UE;
Behind step 604, the authentication success, the layer 3 of setting up UE and the non-3GPP connecting system of trusted is connected.Connecting system is that UE distributes the Care-of Address CoA of an IP address as UE;
Step 606, trusted non-3 GPP access network close according to APN selects a PCRF, and sends " gateway control session foundation " request to this PCRF, carries sign and the CoA of UE in the message.PCRF determines the qos policy rule according to the CAMEL-Subscription-Information of UE, and sends to trusted non-3 GPP access network pass by " gateway control session is set up and confirmed ";
Step 608, trusted non-3 GPP access network close that PCRF related information with the IP-CAN session sends to HSS and/or AAA registers.Related information comprises the sign of UE, Care-of Address CoA, the sign of PCRF.The sign of PCRF can be the IP address of PCRF, also can be the FQDN of PCRF;
Step 610, UE obtain the address of P-GW, set up the Security Association between UE and the P-GW, obtain the P-GW address approach and can inquire about by DHCP, also can inquire about by DNS;
Step 612, UE send " Binding Update " request to P-GW, carry CoA;
Step 614, P-GW send the request of PCRF related information to HSS/AAA, carry UE sign and Care-of Address CoA in the message, and P-GW is the home address HoA that UE distributes, the address of P-GW.HSS/AAA determines the PCRF sign of this IP-CAN correspondence according to UE sign and Care-of Address CoA, and the address of HoA and P-GW is added in the related information of this IP-CAN session;
Step 616, HSS/AAA return the response of PCRF related information to P-GW, carry the PCRF sign in the message;
Step 618, P-GW find the trusted non-3 GPP access network to close selected PCRF according to the PCRF sign.P-GW sends " IP-CAN session modification " request message to PCRF, carries sign, CoA and the HoA of UE in the message.PCRF closes the IP-CAN session of being registered with the trusted non-3 GPP access network and is associated with the session that P-GW is registered according to sign and the CoA of UE, simultaneously HoA is added in the related information.The PCC strategy that PCRF is relevant with this session brings P-GW by " affirmation of IP-CAN session modification " message;
Step 620, P-GW send DSMIPv6 binding acknowledgement message to UE, carry the HoA that distributes into UE;
Set up the DSMIPv6 tunnel between step 622, UE and the P-GW.
Below be handoff procedure:
Step 624, UE find the 3GPP connecting system and initiate to switch;
Step 626, UE send Attach Request message to MME;
Step 628, MME initiate the identifying procedure to UE, MME and HSS exchange authentication information;
Step 630, MME are initiated more new technological process of position, and the related information of all IP-CAN sessions that the address of the P-GW that HSS connects UE in the subscription data of UE and the 3GPP system is relevant with UE comprises that PCRF information sends to MME;
Step 632, MME determine the sign of the selected PCRF of each IP-CAN session in the origin system according to the UE sign PCRF information related with the IP address search of P-GW.MME selects a S-GW, and sends carrying to it and set up request message, carries address and the sign of corresponding PCRF with it of sign, HoA, the P-GW of UE in the message;
Step 634, S-GW send " agent binding update " request, the sign of carrying UE in this message to P-GW;
Step 636, P-GW find selected PCRF in the origin system according to the PCRF sign of preserving.P-GW sends " IP-CAN session modification " request message to PCRF, carries sign and the HoA of UE in the message.PCRF brings P-GW with UE relevant PCC strategy in origin system by " affirmation of IP-CAN session modification " message according to sign and the HoA of UE;
Step 638, P-GW send " agent binding affirmation " message to S-GW;
Step 640, S-GW find selected PCRF in the origin system according to the PCRF sign, and send " gateway control and QoS rule request " message to PCRF, carry sign and the HoA of UE in the message.PCRF brings S-GW with UE relevant qos policy in origin system by " gateway control and the response of QoS rule " message according to sign and the HoA of UE;
Step 642, S-GW send carrying to MME and set up response;
Step 644, RAB are set up;
Set up RAB between step 646, UE and the S-GW, set up the PMIPv6 tunnel between S-GW and the P-GW.
Embodiment ten
Present embodiment is identical with embodiment nine, what describe also is to be in the non-3GPP coverage of trusted as UE, and what the 3GPP core net adopted is the EPS framework, attaching process and UE when UE adopts the DSMIPv6 agreement to insert switch to the 3GPP system from non-3GPP IP Access Network, the attaching process of the interface protocol in the 3GPP system between S-GW and P-GW during based on PMIPv6.
Difference is, UE will be established to the IP-CAN session of a certain PDN in the attaching process of non-3GPP, after the trusted non-3 GPP access network close to be selected PCRF, by selected PCRF but not the PCRF related information that the trusted non-3 GPP access network closes this IP-CAN session sends to HSS/AAA.For this reason, need between PCRF and HSS, increase the interface Sr of a transmission PCRF related information, as shown in Figure 7.
What the flow chart of present embodiment was shown in Fig. 6 B, except that step 608 becomes following step 608 ', the description of other step is identical with Fig. 6 A, wherein step 608 ' is described below:
608 ', selected PCRF sends to HSS/AAA with the PCRF related information of IP-CAN session and registers.Related information comprises the sign of UE, Care-of Address CoA, the sign of PCRF.The sign of PCRF can be the IP address of PCRF, also can be the FQDN of PCRF;
Correspondingly, core net provided by the invention adopts the 3GPP system of the grouping system framework of evolution, comprise policy billing control server PCRF, home subscriber server HSS, authentication and authorization charging server AAA, grouped data network gateway P-GW, the packet data gateway ePDG of evolution and mobile management unit MME, but increased by an interface that transmits the PCRF related information between described PCRF and the described HSS; Wherein:
PCRF is used for being established at user equipment (UE) the IP connection Access Network IP-CAN conversation procedure of packet data network, behind the related news of the session foundation that strategy and charge execution function module PCEF place entity send in receiving native system or non-3 GPP system, the PCRF information of described IP-CAN session association is sent to home subscriber server HSS by described interface.In conjunction with the embodiment of said method, comprise two kinds of situations here at least:
PCRF is after Indication message is set up in the IP CAN session of receiving the P-GW transmission, the relevant policy and charging control strategy of CAMEL-Subscription-Information decision carrying according to UE, send IP CAN session to described P-GW and set up acknowledge message, and the information of this PCRF is sent to HSS register; Perhaps
PCRF is after receiving the gateway control session foundation request that the trusted non-3 GPP access network closes or ePDG sends, CAMEL-Subscription-Information decision qos policy rule according to UE, set up acknowledge message by gateway control session and send to described trusted non-3 GPP access network and close or ePDG, and the information of this PCRF sent to HSS and/or AAA registers.
And HSS is used for when described UE switches to goal systems, and the PCRF information of each IP-CAN session association that described UE is relevant turns back to the interdependent node of goal systems.Also comprise following two kinds of situations at least:
HSS be used for UE from described 3GPP system switch to system that non-3GPP inserts in access authentication procedure, close or the packet data gateway ePDG of evolution returns the related information of the address of the P-GW that connects at UE described in the 3GPP system all the IP-CAN sessions relevant with UE to the trusted non-3 GPP access network, the related information of described IP-CAN session comprises PCRF information; Perhaps
HSS is used for the user data insertion process after UE switches to described 3GPP system from the system that described non-3GPP inserts authentication is passed through, the related information of all IP-CAN sessions that the address of the P-GW that UE in the subscription data of UE and the 3GPP system is connected is relevant with UE sends to MME, and the related information of described IP-CAN session comprises PCRF information.
More than described from 3GPP and switched to trusted non-3 GPP access network and non-trust non-3 GPP access network, and switch to the method that each the PCEF module that how to guarantee under several sights such as 3GPP origin system and the goal systems can find same PCRF from trusted non-3 GPP access network and non-trust non-3 GPP access network, every kind of sight has all provided two kinds of different embodiment, has also described the different flow processs when adopting different agreement under some sight.The combination here is very many:
For example: be in the non-3GPP coverage of trusted, and what the 3GPP core net adopted is the EPS framework, when the UE that adopts the PMIPv6 agreement to insert switches to the 3GPP network, be attached in the process of trusted non-3 GPP system at UE, be to select PCRF, then by P-GW or select PCRF that the PCRF information of association is sent to HSS/AAA by P-GW.
And for example: be in the non-3GPP coverage of non-trust, and what the 3GPP core net adopted is the EPS framework, when the UE that adopts the DSMIPv6 agreement to insert switches to the 3GPP network, be attached in the process of trusted non-3 GPP system at UE, be to select PCRF, by the PCRF of ePDG or selection the PCRF information of association sent to HSS/AAA then by ePDG.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (15)
1. the system of selection of a policy billing control server, described policy billing control server are the grouping system framework that PCRF is positioned at the core net employing evolution of 3GPP system and this 3GPP system, and the method comprising the steps of:
When (a) user equipment (UE) is established to the IP connection Access Network IP-CAN session of a certain packet data network, after strategy and charge execution function module PCEF place entity selection one PCRF register in the origin system, by strategy and charge execution function module PCEF place entity or selected PCRF in the described origin system PCRF information of described IP-CAN session association is sent to home subscriber server HSS and/or authentication and authorization charging server AAA, described HSS preserves this information and/or AAA preserves this information, and HSS obtains described PCRF information from AAA;
When (b) described UE switches to goal systems, the PCRF information of each IP-CAN session association that described HSS is relevant with described UE turns back to the interdependent node of goal systems, described interdependent node is in the process of rebuilding described IP-CAN session, determine the PCRF of described IP-CAN session correspondence according to the PCRF information of described IP-CAN session association, mutual with it acquisition strategy rule.
2. system of selection as claimed in claim 1 is characterized in that:
In the step (a), the PCRF information of described IP-CAN session association is sent to described HSS, has increased by an interface that transmits the PCRF related information between then described PCRF and the described HSS by selected PCRF.
3. system of selection as claimed in claim 1 is characterized in that:
Insert from described 3GPP system before described UE switches, in attaching process, the described PCEF in the origin system goes up resident PCEF for the grouped data network gateway P-GW that selects described PCRF; By this P-GW or selected PCRF the PCRF information of IP-CAN session association is sent to described HSS then.
4. system of selection as claimed in claim 3 is characterized in that:
Described UE switches to the system that the non-3GPP of trusted inserts from described 3GPP system, in access authentication procedure, described HSS closes the related information of the address return the P-GW that connects at UE described in the 3GPP system and all IP-CAN sessions relevant with UE to the trusted non-3 GPP access network, and described related information comprises PCRF information;
After the attaching process of layer 3 is triggered, described trusted non-3 GPP access network closes according to the UE sign PCRF information related with the IP address search of P-GW, determine the sign of the selected PCRF of each IP-CAN session relevant in the origin system with this UE, find selected PCRF in the origin system according to this PCRF sign, mutual with it acquisition strategy rule, described P-GW then finds selected PCRF in the origin system according to the PCRF sign of preserving, mutual with it acquisition strategy rule.
5. system of selection as claimed in claim 3 is characterized in that:
Described UE switches to the system that the non-3GPP of non-trust inserts from described 3GPP system, in access authentication procedure, described HSS returns the address of the P-GW that connects at UE described in the 3GPP system and the related information of all IP-CAN sessions relevant with UE to the packet data gateway ePDG of evolution, and described related information comprises PCRF information;
Described ePDG is according to the UE sign PCRF information related with the IP address search of P-GW, determine the sign of the selected PCRF of each IP-CAN session relevant in the origin system with this UE, find selected PCRF in the origin system according to this PCRF sign, mutual with it acquisition strategy rule, described P-GW then finds selected PCRF in the origin system according to the PCRF sign of preserving, mutual with it acquisition strategy rule.
6. system of selection as claimed in claim 1 is characterized in that:
Before switching, described UE inserts from the system that the non-3GPP of trusted inserts, in attaching process, described PCEF in the origin system goes up resident PCEF for the grouped data network gateway P-GW that selects described PCRF, perhaps shuts resident PCEF for the trusted non-3 GPP access network of selecting described PCRF; Close by described P-GW, described trusted non-3 GPP access network then or selected PCRF sends to HSS and/or AAA with the PCRF information of IP-CAN session association, described HSS preserves this information and/or AAA preserves this information, and HSS obtains described PCRF information from AAA; When not being described P-GW when selecting PCRF, described P-GW needs obtain the PCRF information of described IP-CAN session association from described HSS.
7. system of selection as claimed in claim 1 is characterized in that:
Before switching, described UE inserts from the system that the non-3GPP of non-trust inserts, in attaching process, described PCEF in the origin system goes up resident PCEF for the grouped data network gateway P-GW that selects described PCRF, perhaps is to select the packet data gateway ePDG of the evolution of described PCRF to go up resident PCEF; By described P-GW, described ePDG or selected PCRF the PCRF information of IP-CAN session association is sent to HSS and/or AAA then, described HSS preserves this information and/or AAA preserves this information, HSS obtains described PCRF information from AAA, when not being described P-GW when selecting PCRF, described P-GW needs obtain the PCRF information of described IP-CAN session association from described HSS.
8. as claim 6 or 7 described systems of selection, it is characterized in that:
Described UE switches to described 3GPP system from the system that described non-3GPP inserts, pass through in the user data insertion process of back in the 3GPP authentication, the related information of the address of the P-GW that described HSS connects UE in the subscription data of UE, the 3GPP system and all the IP-CAN sessions relevant with UE, described related information comprises PCRF information, sends to mobile management unit MME;
Described MME is according to the UE sign PCRF information related with the IP address search of P-GW, determine the sign of the selected PCRF of each IP-CAN session relevant in the origin system with this UE, MME selects a S-GW, and the sign of described PCRF is sent to the S-GW of selection, described S-GW finds selected PCRF in the origin system according to described PCRF sign, mutual with it acquisition strategy rule; Described P-GW then finds selected PCRF in the origin system according to the PCRF sign of preserving, mutual with it acquisition strategy rule.
9. as claim 6 or 7 described systems of selection, it is characterized in that:
Described P-GW obtains described IP-CAN session association from described HSS PCRF information may further comprise the steps:
Described P-GW sends the request of PCRF related information to HSS and/or AAA, described HSS preserves this PCRF related information and/or AAA preserves this PCRF related information, HSS obtains described PCRF related information from AAA, carry UE sign and Care-of Address CoA, described P-GW is the home address HoA that UE distributes, the address of P-GW;
Described HSS and/or AAA determine the PCRF sign of this IP-CAN according to UE sign and Care-of Address CoA, and the address of HoA and P-GW is added in the related information of this IP-CAN session, and return PCRF related information response to P-GW, carry the PCRF sign in this response message.
10. system of selection as claimed in claim 1 is characterized in that:
Described IP-CAN session is determined according to the home address of the sign of UE and UE is unique; Perhaps unique definite according to sign and the APN of UE; Perhaps determine according to the address of the sign of UE and grouped data network gateway P-GW is unique.
11. system of selection as claimed in claim 1 is characterized in that:
The PCRF information of described IP-CAN session association is included in and sends to described HSS and/or AAA in the five-tuple, and this five-tuple comprises UE sign, APN, P-GW address, HoA and PCRF sign; Perhaps
The PCRF information of described IP-CAN session association is included in and sends to described HSS and/or AAA in the tlv triple, and this tlv triple comprises UE sign, Care-of Address CoA and PCRF sign;
Described HSS preserves this PCRF related information and/or AAA preserves this PCRF related information, and HSS obtains described PCRF related information from AAA.
12. a core net adopts the 3GPP system of the grouping system framework of evolution, comprise policy billing control server PCRF, home subscriber server HSS, authentication and authorization charging server AAA, grouped data network gateway P-GW, the packet data gateway ePDG of evolution and mobile management unit MME is characterized in that:
Increased the interface of a transmission PCRF related information between described PCRF and the described HSS;
Described PCRF is used for being established at user equipment (UE) the IP connection Access Network IP-CAN conversation procedure of packet data network, behind the related news of the session foundation that strategy and charge execution function module PCEF place entity send in receiving native system or non-3 GPP system, the PCRF information of described IP-CAN session association is sent to home subscriber server HSS by described interface;
Described HSS is used for when described UE switches to goal systems, and the PCRF information of each IP-CAN session association that described UE is relevant turns back to the interdependent node of goal systems.
13. 3GPP as claimed in claim 12 system is characterized in that:
Described PCRF is after Indication message is set up in the IP-CAN session of receiving the P-GW transmission, the relevant policy and charging control strategy of CAMEL-Subscription-Information decision carrying according to UE, send the IPCAN session to described P-GW and set up acknowledge message, and the information of this PCRF is sent to HSS register; Perhaps
Described PCRF is after receiving the gateway control session foundation request that the trusted non-3 GPP access network closes or ePDG sends, CAMEL-Subscription-Information decision qos policy rule according to UE, set up acknowledge message by gateway control session and send to described trusted non-3 GPP access network pass or ePDG, and the information of this PCRF sent to that HSS registers and/or the information of this PCRF is sent to AAA and register, HSS obtains described PCRF information from AAA.
14., it is characterized in that as claim 12 or 13 described 3GPP systems:
Described HSS be used for UE from described 3GPP system switch to system that non-3GPP inserts in access authentication procedure, close or the packet data gateway ePDG of evolution returns the related information of the address of the P-GW that connects at UE described in the 3GPP system all the IP-CAN sessions relevant with UE to the trusted non-3 GPP access network, the related information of described IP-CAN session comprises PCRF information.
15., it is characterized in that as claim 12 or 13 described 3GPP systems:
Described HSS is used for the user data insertion process after UE switches to described 3GPP system from the system that described non-3GPP inserts authentication is passed through, the related information of all IP-CAN sessions that the address of the P-GW that UE in the subscription data of UE and the 3GPP system is connected is relevant with UE sends to MME, and the related information of described IP-CAN session comprises PCRF information.
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