CN101217810B - A selecting method of strategy and charging rule functions - Google Patents

A selecting method of strategy and charging rule functions Download PDF

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CN101217810B
CN101217810B CN2008100045331A CN200810004533A CN101217810B CN 101217810 B CN101217810 B CN 101217810B CN 2008100045331 A CN2008100045331 A CN 2008100045331A CN 200810004533 A CN200810004533 A CN 200810004533A CN 101217810 B CN101217810 B CN 101217810B
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session
dra
pcrf
home network
message
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CN101217810A (en
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周晓云
宗在峰
芮通
朱进国
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ZTE Corp
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ZTE Corp
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Priority to CN2008100045331A priority Critical patent/CN101217810B/en
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Priority to ES08869485.6T priority patent/ES2553191T3/en
Priority to EP08869485.6A priority patent/EP2234422B1/en
Priority to US12/811,075 priority patent/US8326263B2/en
Priority to PCT/CN2008/073276 priority patent/WO2009086759A1/en
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Abstract

The invention provides a selection method of a strategy and accounting rule. When a UE is accessed into a 3GPP system through the E-UTRAN of a visit network or a trusted non-3GPP IP, when the DRA of the visit network establishes a request message by receiving a session which is sent by a PCEF and/or GWCF and transfers the request message to the PCRF of the visit network which is selected by the DRA of the visit network, and the PCRF of the visit network transfers the message to the DRA of a home network; the DRA of the home network receives a session establishment request message and sends the message to the PCRF of the home network which is selected by the DRA of the home network; if an AF is located at the visit network, when the DRA of the visit network receives an application/service information and message, the information and message are transferred to the PCRF of the visit network which is selected by the DRA of the visit network; the PCRF of the visit network transfers the application/service information and message to the DRA of the home network.

Description

A kind of system of selection of "Policy and Charging Rules Function
Technical field
The present invention relates to the communications field, relate in particular to a kind of system of selection of "Policy and Charging Rules Function.
Background technology
3GPP (3rd Generation Partnership Project, third generation partner program) grouping system of evolution (Evolved Packet System, be called for short EPS) by UTRAN (the EvolvedUniversal Terrestrial Radio Access Network of evolution, be called for short E-UTRAN), MME (MobilityManagement Entity, mobile management unit), S-GW (Serving Gateway, gateway), PDN GW (Packet Data Network GateWay, data network gateway, be called for short P-GW), HSS (Home Subscriber Server, home subscriber server), 3GPP AAA (authentication and authorization charging) server, PCRF (Policy and Charging Rules Function, "Policy and Charging Rules Function), reaching other support nodes forms.
Wherein, MME is responsible for the processing of mobile management, Non-Access Stratum signaling, user's chain of command related works such as the contextual management of 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 3GPP EPS and PDN network, is responsible for the access of PDN, transmits function such as data between EPS and PDN.
PCRF is the "Policy and Charging Rules Function entity, and it obtains business information by Rx interface and the IP of operator (InternetProtocol, Internet Protocol) business network interface; And link to each other with gateway device in the network by the S7/S7a/S7c interface, be responsible for initiating the foundation of IP carrying, the QoS (Quality of Service, service quality) of assurance business datum, and the control of chargeing.
Fig. 1 is the system architecture diagram of EPS.As shown in Figure 1, the intercommunication of EPS support and non-3GPP network.Realize that by the S2a/b interface P-GW is as 3GPP and the internetwork anchor point of non-3GPP with the intercommunication of non-3GPP network.Wherein, non-3 GPP system is divided into the non-3GPP IP access of trusted and trustless non-3GPP IP access.The non-3GPP IP of trusted inserts can be directly by S2a and P-GW interface; Trustless non-3GPP IP inserts to be needed to link to each other with P-GW through ePDG (Evolved Packet Data Gateway, the data gateway of evolution), and the interface between ePDG and P-GW is S2b.
In traditional 3GPP network, strategy and charge execution function (PCEF, Policy and chargingenforcement function) exist only among the P-GW, PCRF needs only the control that can finish all functions with the P-GW interface, passes through S7 interface exchange message between PCRF and P-GW.But, interface when between P-GW and S-GW is based on PMIPv6 (Proxy Mobile IP v6, proxy-mobile IP version 6) time, policy enforcement function in the PCEF function also part is present among the S-GW, be called gateway control function (GWCF, Gateway Control Function, gateway control function), be also referred to as BBERF (BearerBinding and Event Reporting Function, bearing binding and event reporting function); Pass through S7c interface exchange message between S-GW and the PCRF.When inserting by the non-3GPP connecting system of trusted, the also resident GWCF in the trusted non-3 GPP access network Central Shanxi Plain.Pass through S7a interface exchange message between trusted non-3 GPP access network pass and the PCRF.
When UE (User Equipment, user terminal) roamed, the S9 interface was as the interface of home network PCRF and visited network PCRF; Simultaneously, for providing professional AF (Application Function, application function), UE sends the business information that is used to generate PCC (Policy ChargingContorl, policy and charging control) strategy to PCRF by the Rx+ interface.
There are three kinds of roaming frameworks in the EPS system, and first kind is called local route (Home Routed), and as shown in Figure 1, P-GW is at home network (home network), and provides IP operation (being that AF is at home network) by home network operator; Second kind is called local transporting and provides IP operation (Local Break, with home operator ' s Application Functions only) by home network operator, as shown in Figure 2; The third is called local transporting and provides IP operation (LocalBreak, with visited operator ' s Application Functions only) by visited network operator, as shown in Figure 3.
Have a plurality of PCRF nodes among the PLMN of EPS, and all PCRF nodes belong to one or more Diameter (PCRF) territory (hereafter is the PCRF territory), promptly be based on Diameter (diameter) agreement between each PCRF entity.All PCRF in PCRF territory are equality.UE is called an IP-CAN (IP ConnectivityAccess Network, IP connects access network) session to the connection of PDN network.The PCC strategy of an IP-CAN session is only by a PCRF decision.All PCEFs, GWCF and the AF relevant in order to ensure an IP-CAN session are associated with same PCRF, and EPS has introduced a logic function module DRA (Diameter Routing Agent, Diameter route agent) in each PCRF territory.When UE is established to the IP-CAN session of a PDN, be that a PCRF is selected in this IP-CAN session by DRA.PCEF, GWCF and AF that this IP-CAN session is relevant are associated with on the selected PCRF by DRA.But specifically how carry out the initial selected of PCRF by DRA, and how that an IP-CAN session is relevant PCEF, GWCF and AF to be associated with same PCRF still be a problem that waits to solve.
Summary of the invention
Technical problem to be solved by this invention is, proposes a kind ofly to select the method for PCRF by DRA for the IP-CAN session, makes this IP-CAN session relevant PCEF, GWCF and AF all be associated with one PCRF.
In order to address the above problem, the invention provides a kind of system of selection of "Policy and Charging Rules Function, it is characterized in that E-UTRAN or the trusted non-3GPP IP when inserting 3GPP system of UE by visited network:
The DRA of visited network receives session that PCEF and/or GWCF send when setting up request message, forwards it to the PCRF of the DRA of this visited network for the selected visited network of corresponding IP-CAN session; The PCRF of this visited network is with the DRA of above-mentioned forwards to home network;
The DRA of home network receives session that PCEF and/or GWCF send when setting up request message, forwards it to the PCRF of the DRA of this home network for the selected home network of corresponding IP-CAN session;
If AF is positioned at visited network, then the DRA of visited network forwards it to the PCRF of the DRA of above-mentioned visited network for the selected visited network of corresponding IP-CAN session when receiving the application of described IP-CAN session/business information message; The PCRF of this visited network is with the DRA of above-mentioned application/business information forwards to home network;
If AF is positioned at home network, when then the DRA of home network receives the application of described IP-CAN session/business information message, forward it to the PCRF of the DRA of above-mentioned home network for the selected home network of this IP-CAN session.
In addition, the described session of PCEF transmission is set up request message and is set up Indication message for the IP-CAN session; It is that gateway control session is set up message that request message is set up in the described session that GWCF sends.
In addition, the DRA of described visited network and the DRA of described home network receive the IP-CAN session when setting up Indication message and/or gateway control session and setting up message, search the record of local storage:
If do not find the record of this IP-CAN session, then be that a PCRF is selected in this IP-CAN session, and write down the corresponding relation of this IP-CAN session and this PCRF; And with above-mentioned forwards to described selected PCRF;
If find the record of this IP-CAN session, then with the PCRF of above-mentioned forwards to this record correspondence;
The DRA of described visited network and home network, or the DRA of home network is when receiving described application/business information message, according to the described IP-CAN session of local record and the corresponding relation of PCRF, with this forwards to corresponding PCRF.
In addition, the PCRF of described visited network receives described IP-CAN session when setting up Indication message and/or gateway control session and setting up message, search the home network DRA of this IP-CAN session correspondence according to the UE ID that comprises in the above-mentioned message, write down the corresponding relation of this IP-CAN session and this home network DRA, and above-mentioned message is sent to this home network DRA;
When the PCRF of described visited network receives described application/business information message,, this message is sent to the home network DRA of correspondence according to the IP-CAN session and the corresponding relation of home network DRA of record.
In addition, the PCRF of home network receives the IP-CAN session when setting up Indication message, generates corresponding PCC strategy, and it is included in the IP-CAN session sets up the DRA that sends to home network in the acknowledge message;
If the network element at PCEF place is positioned at home network, then the DRA of home network forwards it to PCEF after receiving above-mentioned acknowledge message; If the network element at PCEF place is positioned at visited network, after then the DRA of home network received above-mentioned acknowledge message, PCRF and DRA by visited network forwarded it to PCEF.
In addition, the PCRF of home network receives gateway control session when setting up message, generates corresponding qos policy, and it is included in gateway control session sets up the DRA that sends to home network in the acknowledge message;
If the network element at GWCF place is positioned at home network, then the DRA of home network forwards it to GWCF after receiving above-mentioned acknowledge message; If the network element at GWCF place is positioned at visited network, after then the DRA of home network received above-mentioned acknowledge message, PCRF and DRA by visited network forwarded it to GWCF.
In addition, when the PCRF of home network receives application/business information message, preserve the business information that is used to generate the PCC strategy that wherein comprises, and send acknowledge message to the DRA of home network;
If AF is positioned at home network, then the DRA of home network forwards it to AF after receiving above-mentioned acknowledge message; If AF is positioned at visited network, after then the DRA of home network received above-mentioned acknowledge message, PCRF and DRA by visited network forwarded it to AF.
In addition, the PCRF of visited network receives after described IP-CAN session sets up acknowledge message, and after according to local policy the PCC strategy that wherein comprises being made amendment, the DRA by described visited network is forwarded to PCEF with this message.
In addition, the PCRF of visited network receives after described gateway control session sets up acknowledge message, and after according to local policy the qos policy that wherein comprises being made amendment, the DRA by described visited network is forwarded to GWCF with this message.
In addition, described UE inserts the 3GPP system being switched to by E-UTRAN by trusted or trustless non-3GPP IP, or oppositely switches, and PCEF is when being positioned at visited network:
When the DRA of described visited network receives the IP-CAN session modification message of PCEF transmission, according to the record of this IP-CAN session of storing, with the PCRF of above-mentioned forwards to corresponding visited network;
The PCRF of this visited network is according to the UE ID that comprises in this message, or according to the IP-CAN session of local record and the corresponding relation of home network DRA, with the DRA of above-mentioned forwards to home network;
When the DRA of home network receives above-mentioned message,, forward it to the PCRF of corresponding home network according to the record of this IP-CAN session of storage;
The PCRF of home network revises the PCC strategy of this IP-CAN session, and amended PCC strategy is included in the IP-CAN session modification acknowledge message, and DRA, the PCRF of visited network, the DRA of visited network by home network are sent to PCEF.
In addition, described UE inserts the 3GPP system being inserted by E-UTRAN to switch to by trusted or trustless non-3GPPIP, or oppositely switches, and PCEF is when being positioned at home network:
When the DRA of home network receives the IP-CAN session modification message of PCEF transmission,, forward it to the PCRF of corresponding home network according to the record of this IP-CAN session of storing;
The PCRF of home network revises the PCC strategy of this IP-CAN session, and amended PCC strategy is included in the IP-CAN session modification acknowledge message, and the DRA by home network is sent to PCEF.
In addition, the PCRF of visited network makes amendment to the PCC strategy that comprises in this message after receiving described IP-CAN session modification acknowledge message, and the DRA of this message by visited network is sent to PCEF.
The present invention also provides a kind of system of selection of "Policy and Charging Rules Function, it is characterized in that, UE adopts the roaming framework of local route, when the trustless non-3GPP IP by visited network inserts the 3GPP system:
The DRA of home network receives IP-CAN session that PCEF sends when setting up Indication message, is the PCRF of the selected home network of IP-CAN session of correspondence, and with this forwards to this PCRF; And when receiving the application that AF sends/business information message, with this forwards to above-mentioned PCRF;
The PCRF of home network generates corresponding PCC strategy receiving the IP-CAN session when setting up Indication message, it is included in the DRA by home network sends to PCEF in the corresponding affirmation message; And when receiving application/business information message, preserve the business information that is used to generate the PCC strategy that wherein comprises, the DRA by home network sends acknowledge message to AF.
In addition, behind the PCRF of the DRA of described home network for the selected home network of IP-CAN session, write down the corresponding relation of this IP-CAN session and this PCRF;
When the DRA of described home network receives described application/business information message, according to the IP-CAN session of above-mentioned record and the corresponding relation of PCRF, with this forwards to corresponding PCRF.
The present invention also provides a kind of system of selection of "Policy and Charging Rules Function, it is characterized in that, UE adopts the roaming framework of local transporting, when the trustless non-3GPP IP by visited network inserts the 3GPP system:
The DRA of visited network receives IP-CAN session that PCEF sends when setting up Indication message, is the PCRF of the selected visited network of IP-CAN session of correspondence; And with the PCRF of this forwards to this visited network; The PCRF of this visited network is with the DRA of above-mentioned forwards to home network;
When the DRA of home network receives above-mentioned message, be the PCRF of the selected home network of IP-CAN session of correspondence; And with the PCRF of this forwards to this home network;
The DRA of visited network and home network, or the DRA of home network forwards it to the above-mentioned selected PCRF of this IP-CAN session that is when receiving the application of the described IP-CAN session that AF sends/business information message.
In addition, the DRA of described visited network and the DRA of described home network write down the corresponding relation of this IP-CAN session and this PCRF being after the PCRF of visited network is selected in corresponding IP-CAN session;
The DRA of described visited network and home network, or the DRA of home network is when receiving the application that described AF sends/business information message, according to the described IP-CAN session of local record and the corresponding relation of PCRF, with the PCRF of this forwards to correspondence.
In addition, the PCRF of described visited network receives described IP-CAN session when setting up Indication message, search the home network DRA of this IP-CAN session correspondence according to the UE ID that comprises in the above-mentioned message, write down the corresponding relation of this IP-CAN session and this home network DRA, and above-mentioned message is sent to this home network DRA;
When the PCRF of described visited network receives described application/business information message,, this message is sent to the home network DRA of correspondence according to the IP-CAN session and the corresponding relation of home network DRA of record.
As from the foregoing, adopt PCRF system of selection of the present invention, when UE was in the roaming state of local route or local transporting, the single visited network and the PCRF of home network were selected in the IP-CAN session that can be this UE.
Description of drawings
Fig. 1 is the roaming Organization Chart of the local route of EPS system;
Fig. 2 is the local transporting of EPS system and the roaming Organization Chart that IP operation is provided by home network operator;
Fig. 3 is the local transporting of EPS system and the roaming Organization Chart that IP operation is provided by access zone network operator;
Fig. 4 is the flow chart of first embodiment of the invention;
Fig. 5 is the flow chart of second embodiment of the invention;
Fig. 6 is the flow chart of third embodiment of the invention;
Fig. 7 is the flow chart of fourth embodiment of the invention.
Embodiment
Describe the present invention below in conjunction with drawings and Examples.
First embodiment
What present embodiment was described is: the roaming framework (as shown in Figure 1) that adopts the local route as UE, insert from E-UTRAN, or from the non-3GPP IP access of trusted, or when trustless non-3GPP IP inserts the 3GPP system, set up in the process of an IP-CAN session, P-GW selects the flow process of PCRF, S-GW or trusted non-3 GPP access network close the flow process that finds the selected PCRF of P-GW, and when UE initiates service request based on this IP-CAN session, triggering provides this professional AF to provide application/business information to PCRF, and AF finds the flow process of the selected PCRF of P-GW.The flow chart of present embodiment as shown in Figure 4, each step is described below:
402, in the UE attaching process, after P-GW receives the agent binding update request message of S-GW or the transmission of the non-3GPP IP of trusted IAD, send the IP-CAN session and set up indication request message, P-GW is positioned at the home network of UE as the PCEF entity, and this message is sent to the DRA (note is made hDRA) of home network;
Carry in above-mentioned " indication is set up in the IP-CAN session " request message: NAI (Network AccessIdentifier, network access Identifier), the APN (AccessPoint Name, APN) of the IP address of UE and the PDN that will insert.
404, hDRA searches local information of preserving according to NAI, IP address and APN, do not find the record of this IP-CAN session, therefore hDRA is the PCRF (note is made hPCRF) that P-GW selects a home network, set up and preserve the corresponding relation of IP-CAN session and this hPCRF: (NAI, the IP address, APN, hPCRF address), and with request message be transmitted to hPCRF;
406, hPCRF is according to user's CAMEL-Subscription-Information, and network strategy etc. generate the PCC strategy, and (NAI, IP address APN) identify this IP-CAN session with tuple; HPCRF will comprise above-mentioned PCC strategy " the IP-CAN session is set up and confirmed " message and send to hDRA, issue the PCC strategy;
408, hDRA transmits above-mentioned " the IP-CAN session is set up and confirmed " message to P-GW, and P-GW is according to the PCC policy installation PCC rule that comprises in this message;
410, after S-GW or trusted non-3 GPP access network close the proxy binding acknowledgment messages of receiving the P-GW transmission, send gateway control session and set up message; Carry NAI, IP address and APN in this message; S-GW or trusted non-3 GPP access network close the visited network that is positioned at UE as the GWCF entity, and this message is sent to the DRA (note is made vDRA) of this visited network;
412, vDRA is according to NAI, IP address and APN search local information of preserving, do not find the record of this IP-CAN session, therefore vDRA is that S-GW or trusted non-3 GPP access network close vPCRF of selection, set up and preserve the corresponding relation of IP-CAN session and this vPCRF: (NAI, IP address, APN, the vPCRF address), and with " gateway control session foundation " request message be transmitted to vPCRF;
414, vPCRF therefore set up record for it, and (NAI, IP address identifies APN) with tuple according to the record that NAI, IP address and APN do not find this IP-CAN session; Transmit " gateway control session foundation " request message according to NAI to hDRA simultaneously, set up and preserve corresponding relation (NAI, IP address, APN, hDRA address);
416, hDRA searches local information of preserving according to NAI, IP address and APN, finds to have selected hPCRF for this IP-CAN session, and above-mentioned " gateway control session foundation " request message is transmitted to this hPCRF;
418, hPCRF searches local information of preserving according to NAI, IP address and APN, find that this IP-CAN session registers, this gateway control session is associated with this IP-CAN session, and generate qos policy according to user's CAMEL-Subscription-Information and network strategy etc., it is included in " gateway control session is set up and confirmed " message and sends to hDRA, issue qos policy;
420, hDRA returns to vPCRF with " gateway control session is set up and confirmed " message;
422, vPCRF makes amendment to the qos policy that comprises in " gateway control session is set up and confirmed " message according to local policy, gives vDRA with this forwards again;
424, vDRA closes to S-GW or trusted non-3 GPP access network " gateway control session is set up and confirmed " forwards, and S-GW or trusted non-3 GPP access network close installs qos policy;
426, UE initiates service request to AF, and AF sends " application/business information " message, carries IP address and APN in this message.AF is positioned at the belonging area network of UE, and this message is sent to hDRA;
428, hDRA searches local information of preserving according to IP address and APN, finds to have selected hPCRF for this IP-CAN session, so give this hPCRF with forwards;
430, hPCRF obtains and preserves this business information, is used to generate the PCC strategy, and returns acknowledge message to hDRA;
432, hDRA transmits acknowledge message to AF.
In the foregoing description, if UE inserts by trustless non-3GPP, omit step 410~424.
Second embodiment
What present embodiment was described is: when UE adopts local transporting and the roaming Organization Chart (as shown in Figure 2) of IP operation is provided by home network operator, UE inserts from E-UTRAN, or from the non-3GPP IP access of trusted, or when trustless non-3GPP IP inserts the 3GPP system, set up in the process of an IP-CAN session, P-GW selects the flow process of PCRF, S-GW or trusted non-3 GPP access network close the flow process that finds the selected PCRF of P-GW, and when UE initiates service request based on this IP-CAN session, triggering provides this professional AF to provide application/business information to PCRF, and AF finds the flow process of the selected PCRF of P-GW.The flow chart of present embodiment as shown in Figure 5, each step is described below:
502, in the UE attaching process, after P-GW receives the agent binding update request message of S-GW or the transmission of the non-3GPP IP of trusted IAD, send " indication is set up in the IP-CAN session " request message, P-GW is positioned at the visited network of UE as the PCEF entity, and this message is sent to vDRA;
Carry in above-mentioned " indication is set up in the IP-CAN session " request message: NAI, the APN of the IP address of UE and the PDN that will insert.
504, vDRA searches local information of preserving according to NAI, IP address and APN, do not find the record relevant with this IP-CAN session, therefore vDRA is that P-GW selects vPCRF, set up the corresponding relation of IP-CAN session and this vPCRF: (NAI, the IP address, APN, the vPCRF address), and general's " indication is set up in the IP-CAN session " request message is transmitted to vPCRF;
506, vPCRF therefore set up record for it, and (NAI, IP address identifies APN) with tuple according to the record that NAI, IP address and APN do not find this IP-CAN session; Transmit " indication is set up in the IP-CAN session " request message according to NAI to hDRA simultaneously, and set up corresponding relation: (NAI, IP address, APN, hDRA address);
508, hDRA searches local information of preserving according to NAI, IP address and APN, do not find the record of this IP-CAN session, therefore hDRA is that P-GW selects a hPCRF, and set up the corresponding relation of IP-CAN session and this hPCRF: (NAI, the IP address, APN, the hPCRF address), and to this " indication is set up in the IP-CAN session " request message of hPCRF forwarding;
510, hPCRF is according to user's CAMEL-Subscription-Information, and network strategy etc. generate the PCC strategy, and (NAI, IP address APN) identify this IP-CAN session with tuple; HPCRF will comprise above-mentioned PCC strategy " the IP-CAN session is set up and confirmed " message and send to hDRA, issue the PCC strategy.
512, hDRA transmits above-mentioned " the IP-CAN session is set up and confirmed " message to vPCRF;
514, vPCRF makes amendment to the PCC strategy that comprises in " the IP-CAN session is set up and confirmed " message according to local policy, gives vDRA with this forwards again;
516, vDRA transmits to P-GW and is somebody's turn to do " the IP-CAN session is set up and confirmed " message, and P-GW is according to the PCC policy installation PCC rule that comprises in this message;
518, after S-GW or trusted non-3 GPP access network close the proxy binding acknowledgment messages of receiving the P-GW transmission, send " gateway control session foundation " request message; Carry NAI, IP address and APN in this message; S-GW or trusted non-3 GPP access network close the visited network that is positioned at UE as the GWCF entity, and this message is sent to vDRA;
520, vDRA is according to NAI, and IP address and APN search local information of preserving, and finds to have selected vPCRF for this IP-CAN session, so " gateway control session foundation " request message is transmitted to this vPCRF;
522, vPCRF searches local information of preserving according to NAI, IP address and APN, finds the hDRA of this IP-CAN session correspondence, so should send to this hDRA by " gateway control session foundation " request message;
524, hDRA searches local information of preserving according to NAI, IP address and APN, finds to have selected hPCRF for this IP-CAN session, so should send to this hPCRF by " gateway control session foundation " request message;
526, hPCRF is according to user's CAMEL-Subscription-Information, and network strategy etc. generate qos policy, it is included in " gateway control session is set up and confirmed " message and sends to hDRA, issues qos policy;
528, hDRA returns to vPCRF with " gateway control session is set up and confirmed " message;
530, vPCRF makes amendment to the qos policy that comprises in " gateway control session is set up and confirmed " message according to local policy, gives vDRA with this forwards again;
532, vDRA closes to S-GW or trusted non-3 GPP access network " gateway control session is set up and confirmed " forwards, and S-GW or trusted non-3 GPP access network close installs qos policy;
534, UE initiates service request to AF, and AF sends " application/business information " message, carries IP address and APN in this message.AF is positioned at the home network of UE, and this message is sent to hDRA;
536, hDRA searches local information of preserving according to IP address and APN, finds to have selected hPCRF for this IP-CAN session, so give this hPCRF with forwards;
538, hPCRF obtains and preserves this business information, is used to generate the PCC strategy and returns acknowledge message to hDRA;
540, hDRA transmits acknowledge message to AF.
In the foregoing description, if UE inserts by trustless non-3GPP, omit step 518~532.
The 3rd embodiment
What present embodiment was described is: when UE adopts local transporting and the roaming Organization Chart (as shown in Figure 3) of IP operation is provided by visited network operator, UE inserts or inserts from the non-3GPPIP of trusted from E-UTRAN, or when trustless non-3GPP IP inserts the 3GPP system, in the process of setting up an IP-CAN session, P-GW selects the flow process of PCRF, S-GW or trusted non-3 GPP access network close the flow process that finds the selected PCRF of P-GW, and when UE initiates service request based on this IP-CAN session, triggering provides this professional AF to provide application/business information to PCRF, and AF finds the flow process of the selected PCRF of P-GW.The flow chart of present embodiment as shown in Figure 6, each step is described below:
602~632, identical with step 502~532;
634, UE initiates service request to AF, and AF sends " application/business information " message, carries IP address and APN in this message.AF is positioned at the visited network of UE, and this message is sent to vDRA;
636, vDRA searches local information of preserving according to IP address and APN, finds to have selected vPCRF for this IP-CAN session, so give vPCRF with " application/business information " forwards;
638, vPCRF searches local information of preserving according to IP address and APN, finds the hDRA of this IP-CAN session correspondence, and " application/business information " forwards is arrived this hDRA;
640, hDRA searches local information of preserving according to IP address and APN, finds to have selected hPCRF for this IP-CAN session, so give this hPCRF with forwards;
642, hPCRF obtains and preserves this business information, is used to generate the PCC strategy, and returns acknowledge message to hDRA;
644, hDRA transmits this acknowledge message to vPCRF;
646, vPCRF transmits this acknowledge message to vDRA;
648, vDRA transmits this acknowledge message to AF.
In the foregoing description, if UE inserts by trustless non-3GPP, omit step 618~632.
The 4th embodiment
What present embodiment was described is, when UE adopts local transporting and the roaming Organization Chart (as shown in Figure 3) of IP operation is provided by visited network operator, UE inserts from E-UTRAN and switches to that the non-3GPP IP of trusted inserts or trustless non-3GPP IP when inserting, set up in the process of an IP-CAN session, P-GW selects the flow process of PCRF, S-GW or trusted non-3 GPP access network close the flow process that finds the selected PCRF of P-GW, and when UE initiates service request based on this IP-CAN session, triggering provides this professional AF to provide application/business information to PCRF, and AF finds the flow process of the selected PCRF of P-GW.Wherein, adopt the PMIPv6 agreement between S-GW and the P-GW, adopt the PMIPv6 agreement between the non-3GPP IP access of trusted or trustless non-3GPP IP access and the P-GW.The flow chart of present embodiment as shown in Figure 7, each step is described below:
702, UE inserts by E-UTRAN, initially is attached to the 3GPP system, is established to the connection of certain PDN, in this process, adopts the flow process of the 3rd embodiment, has selected vPCRF1 by vDRA1, has selected hPCRF by hDRA.
704, UE finds non-3 GPP system (comprising trusted or trustless 3GPP system), and switching flow is initiated in decision.In handoff procedure, trusted non-3 GPP access network pass and P-GW are mutual with PCRF, obtain new PCC strategy.
706, in the UE handoff procedure, the trusted non-3 GPP access network sends " gateway control session foundation " request message after closing and receiving that radio bearer is set up request; Carry NAI, IP address and APN in this message; The trusted non-3 GPP access network closes the visited network that is positioned at UE as the GWCF entity, and different with the residing PCRF of S-GW territory; The DRA that the trusted non-3 GPP access network closes PCRF of living in territory is vDRA2, so this message is sent to vDRA2;
708, vDRA2 is according to NAI, IP address and APN search local information of preserving, do not find the record of this IP-CAN session, therefore vDRA2 selects a PCRF:vPCRF2 for the trusted non-3 GPP access network closes, set up the corresponding relation of IP-CAN session and vPCRF2: (NAI, IP address, APN, the vPCRF2 address), and to vPCRF2 transmit " gateway control session foundation " request message;
710, vPCRF2 therefore set up record for it, and (NAI, IP address identifies APN) with tuple according to the record that NAI, IP address and APN do not find this IP-CAN session; Transmit " gateway control session foundation " request message according to NAI to hDRA simultaneously, and set up corresponding relation: (NAI, IP address, APN, hDRA address);
712, hDRA searches local information of preserving according to NAI, IP address and APN, finds the record of this IP-CAN session, transmits " gateway control session foundation " request message to the hPCRF of correspondence;
714, hPCRF is according to user's CAMEL-Subscription-Information, and network strategy etc. generate qos policy, it is included in " gateway control session is set up and confirmed " message and sends to hDRA, issues qos policy;
716, hDRA returns to vPCRF2 with " gateway control session is set up and confirmed " message;
718, vPCRF2 makes amendment to the qos policy that comprises in " gateway control session is set up and confirmed " message according to local policy, gives vDRA2 with this forwards again;
720, vDRA2 closes to the trusted non-3 GPP access network " gateway control session is set up and confirmed " forwards, and the trusted non-3 GPP access network closes installs qos policy;
722, after the switching, P-GW does not change, so after P-GW receives that the trusted non-3 GPP access network closes the agent binding update request message that sends, send " IP-CAN session modification " request message to vDRA1, carries NAI in the message, IP address and APN.
724, vDRA1 searches local information of preserving according to NAI, IP address and APN, finds for this IP-CAN has selected vPCRF1, so transmit " IP-CAN session modification " request message to vPCRF1;
726, vPCRF1 searches local information of preserving according to NAI, IP address and APN, finds the hDRA of this IP-CAN session correspondence, so should send to this hDRA by " IP-CAN session modification " request message;
728, hDRA searches local information of preserving according to NAI, IP address and APN, finds to have selected hPCRF for this IP-CAN session, so should send to this hPCRF by " IP-CAN session modification " request message;
730, hPCRF is according to user's CAMEL-Subscription-Information, and network strategy and IP-CAN type are revised the PCC strategy, it are included in " affirmation of IP-CAN session modification " message and send to hDRA, issues to revise back PCC strategy;
732, hDRA transmits " affirmation of IP-CAN session modification " message to vPCRF1;
734, vPCRF1 is according to local policy, after the PCC strategy that comprises in " affirmation of IP-CAN session modification " message is made amendment, gives vDRA1 with this forwards again;
736, vDRA1 transmits " affirmation of IP-CAN session modification " message to P-GW, and P-GW is according to the PCC policy installation PCC rule that comprises in this message;
738, switch after, AF does not change, thus when UE when AF initiates new service request, AF carries IP address and APN to vDRA1 transmission " application/business information " message in this message;
740, vDRA1 searches local information of preserving according to IP address and APN, finds to have selected vPCRF1 for this IP-CAN session, so transmit " application/business information " message to vPCRF1;
742, vPCRF1 searches local information of preserving according to IP address and APN, finds the hDRA of this IP-CAN session correspondence, and " application/business information " forwards is arrived this hDRA;
744, hDRA searches local information of preserving according to IP address and APN, finds to have selected hPCRF for this IP-CAN session, so give this hPCRF with forwards;
746, hPCRF obtains and preserves this business information, is used to generate the PCC strategy, and returns acknowledge message to hDRA;
748, hDRA transmits this acknowledge message to vPCRF1;
750, vPCRF1 transmits this acknowledge message to vDRA1;
752, vDRA1 transmits this acknowledge message to AF.
In the foregoing description, insert if UE switches to trustless non-3GPP, omit step 706~720.
Based on principle of the present invention, the foregoing description can also have multiple mapping mode, for example:
Among the (one) first to the 3rd embodiment, the IP-CAN session is set up Indication message and is set up the message transmission prior to gateway control session; In other embodiments, also can be that gateway control session is set up message and set up Indication message prior to the IP-CAN session and send, accordingly, DRA receives and is the selected PCRF of IP-CAN session after gateway control session is set up message, when Indication message arrival is set up in the IP-CAN session, use previous selected PCRF to transmit this message.
(2) in the foregoing description, with (NAI, the IP address, APN) unique identification IP-CAN session, also can use (NAI, APN), (the IP address APN) is waited and identified the IP-CAN session;
In addition, NAI can be replaced by other UE ID (identifier), and APN also can be replaced by other PDNID.
Among (three) the 4th embodiment, be that example has been described to insert from E-UTRAN and switched to that the non-3GPP IP of trusted inserts or the PCRF system of selection of trustless non-3GPP IP when inserting with the roaming framework of local transporting; For the roaming framework of local route, flow process is basic identical, and difference only is because P-GW and AF are positioned at home network, and therefore corresponding message directly sends to hDRA.

Claims (17)

1. the system of selection of a "Policy and Charging Rules Function is characterized in that, E-UTRAN or the trusted non-3GPP IP when inserting 3GPP system of UE by visited network:
The DRA of visited network receives session that PCEF and/or GWCF send when setting up request message, forwards it to the PCRF of the DRA of this visited network for the selected visited network of corresponding IP-CAN session; The PCRF of this visited network is with the DRA of above-mentioned forwards to home network;
The DRA of home network receives session that PCEF and/or GWCF send when setting up request message, forwards it to the PCRF of the DRA of this home network for the selected home network of corresponding IP-CAN session;
If AF is positioned at visited network, then the DRA of visited network forwards it to the PCRF of the DRA of above-mentioned visited network for the selected visited network of corresponding IP-CAN session when receiving the application of described IP-CAN session/business information message; The PCRF of this visited network is with the DRA of above-mentioned application/business information forwards to home network;
If AF is positioned at home network, when then the DRA of home network receives the application of described IP-CAN session/business information message, forward it to the PCRF of the DRA of above-mentioned home network for the selected home network of this IP-CAN session.
2. the method for claim 1 is characterized in that, the described session that PCEF sends is set up request message and set up Indication message for the IP-CAN session; It is that gateway control session is set up message that request message is set up in the described session that GWCF sends.
3. method as claimed in claim 2 is characterized in that,
The DRA of described visited network and the DRA of described home network receive the IP-CAN session when setting up Indication message and/or gateway control session and setting up message, search the record of local storage:
If do not find the record of this IP-CAN session, then be that a PCRF is selected in this IP-CAN session, and write down this IP-CAN session and the corresponding relation that is somebody's turn to do selected PCRF; And with above-mentioned forwards to described selected PCRF;
If find the record of this IP-CAN session, then with the PCRF of above-mentioned forwards to this record correspondence;
The DRA of described visited network and home network, or the DRA of home network is when receiving described application/business information message, according to the described IP-CAN session of local record and the corresponding relation of PCRF, with this application/business information forwards to corresponding PCRF.
4. method as claimed in claim 3 is characterized in that,
The PCRF of described visited network receives described IP-CAN session when setting up Indication message and/or gateway control session and setting up message, set up Indication message and/or gateway control session is set up the home network DRA that the UE ID that comprises in the message searches this IP-CAN session correspondence according to above-mentioned IP-CAN session, write down the corresponding relation of this IP-CAN session and this home network DRA, and Indication message and/or gateway control session are set up in above-mentioned IP-CAN session set up message and send to this home network DRA;
When the PCRF of described visited network receives described application/business information message,, this application/business information message is sent to the home network DRA of correspondence according to the IP-CAN session and the corresponding relation of home network DRA of record.
5. method as claimed in claim 2 is characterized in that,
The PCRF of home network receives the IP-CAN session when setting up Indication message, generates corresponding PCC strategy, and it is included in the IP-CAN session sets up the DRA that sends to home network in the acknowledge message;
If the network element at PCEF place is positioned at home network, then the DRA of home network forwards it to PCEF after receiving above-mentioned acknowledge message; If the network element at PCEF place is positioned at visited network, after then the DRA of home network received above-mentioned acknowledge message, PCRF and DRA by visited network forwarded it to PCEF.
6. method as claimed in claim 2 is characterized in that,
The PCRF of home network receives gateway control session when setting up message, generates corresponding qos policy, and it is included in gateway control session sets up the DRA that sends to home network in the acknowledge message;
If the network element at GWCF place is positioned at home network, then the DRA of home network forwards it to GWCF after receiving above-mentioned acknowledge message; If the network element at GWCF place is positioned at visited network, after then the DRA of home network received above-mentioned acknowledge message, PCRF and DRA by visited network forwarded it to GWCF.
7. method as claimed in claim 2 is characterized in that,
When the PCRF of home network receives application/business information message, preserve the business information that is used to generate the PCC strategy that wherein comprises, and send acknowledge message to the DRA of home network;
If AF is positioned at home network, then the DRA of home network forwards it to AF after receiving above-mentioned acknowledge message; If AF is positioned at visited network, after then the DRA of home network received above-mentioned acknowledge message, PCRF and DRA by visited network forwarded it to AF.
8. method as claimed in claim 5, it is characterized in that, the PCRF of visited network receives after described IP-CAN session sets up acknowledge message, after according to local policy the PCC strategy that wherein comprises being made amendment, the DRA of acknowledge message by described visited network set up in this IP-CAN session be forwarded to PCEF.
9. method as claimed in claim 6, it is characterized in that, the PCRF of visited network receives after described gateway control session sets up acknowledge message, after according to local policy the qos policy that wherein comprises being made amendment, this gateway control session is set up the DRA of acknowledge message by described visited network be forwarded to GWCF.
10. method as claimed in claim 4 is characterized in that, described UE inserts the 3GPP system being switched to by E-UTRAN by trusted or trustless non-3GPP IP, or oppositely switches, and PCEF is when being positioned at visited network:
When the DRA of described visited network receives the IP-CAN session modification message of PCEF transmission, according to the record of this IP-CAN session of storing, with the PCRF of above-mentioned IP-CAN session modification forwards to corresponding visited network;
The PCRF of this visited network is according to the UE ID that comprises in this IP-CAN session modification message, or according to the IP-CAN session of local record and the corresponding relation of home network DRA, with the DRA of above-mentioned IP-CAN session modification forwards to home network;
When the DRA of home network receives above-mentioned IP-CAN session modification message,, forward it to the PCRF of corresponding home network according to the record of this IP-CAN session of storage;
The PCRF of home network revises the PCC strategy of this IP-CAN session, and amended PCC strategy is included in the IP-CAN session modification acknowledge message, and DRA, the PCRF of visited network, the DRA of visited network by home network are sent to PCEF.
11. method as claimed in claim 4 is characterized in that, described UE inserts the 3GPP system being inserted by E-UTRAN to switch to by trusted or trustless non-3GPP IP, or oppositely switches, and PCEF is when being positioned at home network:
When the DRA of home network receives the IP-CAN session modification message of PCEF transmission,, forward it to the PCRF of corresponding home network according to the record of this IP-CAN session of storing;
The PCRF of home network revises the PCC strategy of this IP-CAN session, and amended PCC strategy is included in the IP-CAN session modification acknowledge message, and the DRA by home network is sent to PCEF.
12. method as claimed in claim 10, it is characterized in that, after the PCRF of visited network receives described IP-CAN session modification acknowledge message, the PCC strategy that comprises in this IP-CAN session modification acknowledge message is made amendment, and the DRA of this IP-CAN session modification acknowledge message by visited network is sent to PCEF.
13. the system of selection of a "Policy and Charging Rules Function is characterized in that, UE adopts the roaming framework of local route, when the trustless non-3GPP IP by visited network inserts the 3GPP system:
The DRA of home network receives IP-CAN session that PCEF sends when setting up Indication message, is the PCRF of the selected home network of IP-CAN session of correspondence, and with this forwards to this PCRF; And when receiving the application that AF sends/business information message, should use/business information forwards above-mentioned PCRF extremely;
The PCRF of home network generates corresponding PCC strategy receiving the IP-CAN session when setting up Indication message, it is included in the DRA by home network sends to PCEF in the corresponding affirmation message; And when receiving application/business information message, preserve the business information that is used to generate the PCC strategy that wherein comprises, the DRA by home network sends acknowledge message to AF.
14. method as claimed in claim 13 is characterized in that,
Behind the PCRF of the DRA of described home network for the selected home network of IP-CAN session, write down the corresponding relation of this IP-CAN session and this PCRF;
When the DRA of described home network receives described application/business information message, according to the IP-CAN session of above-mentioned record and the corresponding relation of PCRF, with this application/business information forwards to corresponding PCRF.
15. the system of selection of a "Policy and Charging Rules Function is characterized in that, UE adopts the roaming framework of local transporting, when the trustless non-3GPP IP by visited network inserts the 3GPP system:
The DRA of visited network receives IP-CAN session that PCEF sends when setting up Indication message, is the PCRF of the selected visited network of IP-CAN session of correspondence; And with the PCRF of this forwards to this visited network; The PCRF of this visited network is with the DRA of above-mentioned forwards to home network;
When the DRA of home network receives above-mentioned message, be the PCRF of the selected home network of IP-CAN session of correspondence; And with the PCRF of this forwards to this home network;
The DRA of visited network and home network, or the DRA of home network forwards it to the above-mentioned selected PCRF of this IP-CAN session that is when receiving the application of the described IP-CAN session that AF sends/business information message.
16. method as claimed in claim 15 is characterized in that,
The DRA of described visited network and the DRA of described home network are being after the PCRF of visited network is selected in corresponding IP-CAN session, to write down this IP-CAN session and the corresponding relation that is somebody's turn to do selected PCRF;
The DRA of described visited network and home network, or the DRA of home network is when receiving the application that described AF sends/business information message, according to the described IP-CAN session of local record and the corresponding relation of PCRF, with the PCRF of this application/business information forwards to correspondence.
17. method as claimed in claim 16 is characterized in that,
The PCRF of described visited network receives described IP-CAN session when setting up Indication message, set up the home network DRA that the UE ID that comprises in the Indication message searches this IP-CAN session correspondence according to above-mentioned IP-CAN session, write down the corresponding relation of this IP-CAN session and this home network DRA, and Indication message is set up in above-mentioned IP-CAN session sent to this home network DRA;
When the PCRF of described visited network receives described application/business information message,, this application/business information message is sent to the home network DRA of correspondence according to the IP-CAN session and the corresponding relation of home network DRA of record.
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ES08869485.6T ES2553191T3 (en) 2007-12-27 2008-12-01 Procedure for selecting a billing policy and rule function
EP08869485.6A EP2234422B1 (en) 2007-12-27 2008-12-01 Method for selecting policy and charging rules function
US12/811,075 US8326263B2 (en) 2007-12-27 2008-12-01 Method for selecting policy and charging rules function
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