CN102791042A

CN102791042A - Method and system for establishing S9 subsession and policy and charging rules function (PCRF)

Info

Publication number: CN102791042A
Application number: CN2011101273411A
Authority: CN
Inventors: 刘国燕; 周晓云; 吴锦花; 毕以峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-05-17
Filing date: 2011-05-17
Publication date: 2012-11-21
Anticipated expiration: 2031-05-17
Also published as: WO2012155774A1; CN102791042B

Abstract

The invention relates to a method and system for establishing S9 subsession and a policy and charging rules function (PCRF). The method triggers a PCRF of a visit address by a PCRF of a home address to establish S9 subsession, and includes the steps of sending original information relative to establishment of the S9 subsession from the PCRF of the home address to the PCRF of the visit address; and receiving the original information relative to establishment of the S9 subsession by the PCRF of the visit address, generating information relative to S9 subsession according to the original information, and establishing S9 subsession. The method can still establish S9 subsession when an interface doesn't exist between the PCRF in the visited network (V-PCRF) and a mobile network element of the visit address.

Description

S9 session establishing method, system and PCRF

Technical field

The present invention relates to moving communicating field, relate in particular to a kind of S9 session establishing method, system and PCRF.

Background technology

Third generation partner program (3rd Generation Partnership Project; The grouping system of evolution 3GPP) (Evolved Packet System; EPS) by Universal Terrestrial Radio Access Network (the Evolved Universal Terrestrial Radio Access Network of evolution; E-UTRAN), mobile management unit (Mobility Management Entity, MME), gateway (Serving Gateway, S-GW), grouped data network gateway (Packet Data Network Gateway; P-GW) and home subscriber server (Home Subscriber Server HSS) forms.

EPS supports the intercommunication with non-3 GPP system, wherein, passes through the S2a/b/c interface with the intercommunication of non-3 GPP system and realizes that P-GW is as the anchor point between 3GPP and non-3 GPP system.In the system architecture diagram of EPS, non-3 GPP system inserts and is divided into trustless non-3GPP access and the non-3GPP access of trusted; Wherein, (Evolved Packet Data Gateway's packet data gateway of trustless non-3GPP access need process evolution ePDG) links to each other with P-GW, and the interface between ePDG and P-GW is S2b; The non-3GPP of trusted inserts and can directly be connected with P-GW through the S2a interface, and S2a interface employing proxy-mobile IP (Proxy Mobile IP, PMIP) agreement is carried out information interaction; In addition; The S2c interface provides subscriber equipment (User Equipment; UE) with P-GW between relevant control and the mobility support of user plane; The mobility management protocol of its support is that (Moblie IPv6 Support for Dual Stack Hosts and Routers, DSMIPv6), it can be used for trustless non-3GPP and the non-3GPP of trusted inserts for the mobile IP v 6 of supporting two stacks.

The control if the EPS support policy charges (Policy and Charging Control, PCC), "Policy and Charging Rules Function (Policy and Charging Rules Function then; PCRF) carry out the strategy and the formulation of charging regulation; It through interface Rx and carrier network agreement (Internet Protocol, IP) application function in the business network (Application Function, AF) continuous; Obtain business information, be used to generate the business information of PCC strategy.S5/S8 interface between S-GW and P-GW adopt GPRS Tunnel Protocol (GPRS Tunnelling Protocol, in the time of GTP), resident strategy and charge execution function (Policy and Charging Enforcement Function among the P-GW; PCEF); Through Gx interface exchange message, be responsible for initiating foundation, modification and the release of carrying between PCRF and P-GW, guarantee service quality (the Quality of Service of business datum; And the control of chargeing QoS).When the S5/S8 of S-GW and P-GW interface adopts proxy-mobile IP (Proxy Mobile IP; PMIP) time; (the Bearer Binding and Event Report Function of resident bearing binding and event reporting function among the S-GW; BBERF), and between S-GW and the PCRF through Gxc interface exchange message.When through the non-3GPP network insertion of trusted, the also resident BBERF in the trusted non-3 GPP access network Central Shanxi Plain,, as shown in Figure 1 between the IAD of the non-3GPP network of trusted and the PCRF through Gxa interface exchange message.

As subscriber equipment (User Equipment; When UE) roaming, (Home PCRF is H-PCRF) with visit ground PCRF (Visited PCRF for ownership place PCRF; V-PCRF) having interface between is the S9 interface; Make the policy events of roaming, home network can intercommunication, negotiation work, be example with S2a, S2b access way, as shown in Figure 2.

When fixed network during, be fixed network and move fusion architecture as non-3GPP network insertion mobile network.Move in the fusion architecture at fixed network; WLAN (Wireless LAN, WLAN) or base station from home (Home NodeB or Home eNodeB, H (e) NB) can insert EPS (like Fig. 3-shown in Figure 6) through the fixed network circuit; Wherein, Fixed network is as non-3GPP network insertion, the broadband policy controlled function (Broadband Policy Control Function, BPCF) and between the PCRF through S9* interface exchange message; Make mobile network and the intercommunication of fixed network strategy framework, realize the unified management control of mobile network resource and fixed network resource.Under roaming scence, H-PCRF, the interface between V-PCRF and the BPCF need be set up corresponding session, and ownership mobile network's strategy can be delivered in the policy functional entity of roaming place fixed network, realizes the unified management and control of mobile network resource and fixed network resource.

If fixed network can perception move the UE access; The words that perhaps have interface between visit ground mobile net elements and the V-PCRF; Then BPCF sets up S9* session or visit ground mobile net elements to V-PCRF request and sends gateway control session to V-PCRF and set up request/IP-CAN session and set up request message; Set up the S9 session between V-PCRF and then triggering and the H-PCRF, as shown in Figure 7.And; V-PCRF can comprise according to the key message in the message that receives: ID, packet data network (Packet Data Network; PDN) sign and packet data network (Packet Data Network; PDN) connection identifier (if PDN sign and PDN connection identifier then do not carry the PDN connection identifier for concerning one to one) comes further to judge whether to set up S9 session.

Be the principle that V-PCRF sets up S9 session below:

V-PCRF judges at first whether this UE exists corresponding S9 session, and operates accordingly according to the request message of receiving (comprising: gateway control session is set up request/IP-CAN session and set up request message):

A) if there is the S9 session, then request type is for upgrading solicited status; V-PCRF further judge request message whether comprise PDN sign and PDN connection identifier (condition is optional) (such as: can carry these information for S2a interface, S5/S8GTP/PMIP and S2b interface scene); And search this PDN and whether had corresponding S9 session, and handle accordingly:

If A1. can not find corresponding S9 session; Then V-PCRF will distribute a new S9 session identification; Be included in newly-built sub-session carry out the information attribute value to (Attribute-Value Pair, AVP) in, and also comprise sub-session operation A VP etc. among this AVP; Wherein, sub-session operation A VP is made as " foundation " state.

If A2. can find corresponding S9 session, concrete operations are divided into following several kinds of situation:

A. in the request message that V-PCRF receives, comprise the binding session indication and be set as " session delays to bind "; The related same IP-CAN session of new gateway control session with already present gateway control session, then V-PCRF will distribute a new S9 session identification, be included in sub-session and carry out among the information A VP; And also comprise sub-session operation A VP etc. among this AVP; Wherein, sub-session operation A VP is made as " foundation " state, and related new gateway control session and new S9 session;

B. work as V-PCRF and receive the BBERF request message of making a fresh start; During the related same IP-CAN session of new gateway control session with already present gateway control session; But when not having " session delays to bind indication "; Then V-PCRF revises already present S9 session related information, such as: sub-session operation information is made as " modification " state;

C. when V-PCRF receive be the IP-CAN conversation request time, then V-PCRF revises already present S9 session related information, such as: sub-session operation information is made as " modification " state.

B) if there is not the S9 session; Then V-PCRF is with newly-built S9 session; Request type is the initial request state, and further judge whether to comprise PDN sign and PDN connection identifier (condition is optional) (such as: S2a interface, S5/S8GTP/PMIP and S2b interface scene can be carried these information): if comprise, V-PCRF will distribute a new S9 session identification; Be included in sub-session and carry out among the information A VP, and also comprise sub-session operation A VP etc. among this AVP.

See that from top content V-PCRF judges that the information spinner that S9 session is set up will comprise: PDN connection identifier, APN, diameter information etc.

And can not perception move the UE access at fixed network; And do not have between visit ground mobile net elements and the V-PCRF that (H as shown in Figure 3 (e) NB inserts, and perhaps Fig. 4, WLAN S2b shown in Figure 5 insert, and WLAN S2c shown in Figure 6 inserts under the situation of interface; Specifically referring to following explanation); Can find out from following explanation, H-PCRF and P-GW, ownership place ePDG (as shown in Figure 5) has interface conjunctionn.P-GW receives after the corresponding signaling message, can set up the IP-CAN session to the H-PCRF request; After H-PCRF receives the message trigger of P-GW, set up the S9* session to the BPCF request, be used for the intercommunication of follow-up business Policies Resource and consult through V-PCRF.In addition; If (Evolved Packet Data Gateway supports the words (as shown in Figure 5) of Gxb* interface ePDG) and between the PCRF to the packet data gateway of evolution, and then ePDG receives after the corresponding signaling message; Can set up gateway control session to the H-PCRF request; After H-PCRF receives the message trigger of ePDG,, set up the S9* session to the BPCF request through V-PCRF.

See that from top analysis H-PCRF need trigger the foundation of S9 session, under the scene that can obtain the PDN relevant information, also need trigger foundation based on other S9 session of PDN level.Trigger for H-PCRF, set up the S9 session between H-PCRF and the V-PCRF, existing corresponding solution, prior art do not solve H-PCRF triggering V-PCRF and set up the problem of S9 session, and the present invention is intended to address this problem.

Explain:

Fig. 3 is that H (e) NB inserts, and have the Gx interface between P-GW and the H-PCRF, and there is not interface in the network element on V-PCRF and visit ground;

There is the Gx interface in Fig. 4 for WLAN S2b inserts between P-GW and the H-PCRF, and there is not interface in the network element of the non-3GPP network of V-PCRF and visit ground;

There is the Gx interface in Fig. 5 for WLAN S2b inserts between P-GW and the H-PCRF, have the Gxb* interface between ePDG and the H-PCRF, and there is not interface in the network element of the non-3GPP network of V-PCRF and visit ground;

There is the Gx interface in Fig. 6 for WLAN S2c inserts between P-GW and the H-PCRF, and there is not interface in the network element of the non-3GPP network of V-PCRF and visit ground.

Summary of the invention

The technical problem that the present invention will solve provides a kind of S9 session establishing method, system and PCRF, when not having interface to solve V-PCRF with visit ground mobile net elements, can't set up the problem of S9 session.

For solving above technical problem, the invention provides a kind of S9 session establishing method, this method triggers visit ground PCRF by ownership place "Policy and Charging Rules Function (PCRF) and sets up S9 session, comprising:

Ownership place PCRF sends to visit ground PCRF and sets up relevant raw information with S9 session;

Said visit ground PCRF receives and sets up the relevant relevant information of raw information generation S9 session according to said with S9 session, and sets up S9 session.

Further, said and S9 session are set up relevant raw information and are sent through authenticated/authorized request again (RAR) message.

Further, saidly set up relevant raw information with S9 session and comprise: indication is set up in ID, PDN link information, Diameter session identification, session identification, binding session indication, credit control request type and S9 session; The information that said S9 session is relevant comprises session identification, ID, sub-session execution information, Diameter session identification and credit control request type.

Further; Said ownership place PCRF sends said with before relevant raw information is set up in S9 session, receives the triggering of message of packet data gateway (ePDG) or grouped data network gateway (P-GW) transmission of bearing binding and event reporting function (BBERF), evolution.

For solving above technical problem, the present invention also provides a kind of S9 session building system, and this system comprises:

The sending module of ownership place "Policy and Charging Rules Function (PCRF) is used for setting up relevant raw information to visiting ground PCRF transmission with S9 session;

The receiver module of said visit ground PCRF is used to receive that said ownership place PCRF sends sets up relevant raw information with S9 session; And

Module is set up in the sub-session of said visit ground PCRF, is used for setting up the relevant relevant information of raw information generation S9 session according to said with S9 session, and sets up S9 session.

For solving above technical problem, the present invention also provides a kind of "Policy and Charging Rules Function (PCRF), and this PCRF comprises:

Sending module when said PCRF is positioned at ownership place, is used for setting up relevant raw information to visiting ground PCRF transmission with S9 session;

When receiver module, said PCRF are positioned at visit ground, are used to receive said ownership place PCRF transmission and set up relevant raw information with S9 session; And

Module is set up in sub-session, when said PCRF is positioned at ownership place, is used for setting up the relevant relevant information of raw information generation S9 session according to said with S9 session, and sets up S9 session.

For solving above technical problem, the present invention also provides another kind of S9 session establishing method, and this method triggers visit ground PCRF by ownership place "Policy and Charging Rules Function (PCRF) and sets up S9 session, comprising:

When ownership place PCRF sets up S9 session in decision-making, generate the relevant information of S9 session, and send the relevant information of said S9 session to visit ground PCRF;

Said visit ground PCRF receives and sets up S9 session according to the relevant information of said S9 session.

Decision-making module is set up in the sub-session of ownership place "Policy and Charging Rules Function (PCRF), is used for when S9 session is set up in decision-making, generates the relevant information of S9 session;

The sending module of said ownership place PCRF is used for sending the relevant information of said S9 session to visit ground PCRF;

The receiver module of said visit ground PCRF is used to receive the relevant information of S9 session that said ownership place PCRF sends; And

Module is set up in the sub-session of said visit ground PCRF, is used for setting up S9 session according to the relevant information of said S9 session.

Decision-making module is set up in sub-session, when said PCRF is positioned at ownership place, is used for when S9 session is set up in decision-making, generates the relevant information of S9 session;

Sending module when said PCRF is positioned at ownership place, is used for sending the relevant information of said S9 session to visit ground PCRF;

When receiver module, said PCRF are positioned at visit ground, be used to receive the relevant information of S9 session that said ownership place PCRF sends; And

Module is set up in sub-session, when said PCRF is positioned at visit ground, is used for setting up S9 session according to the relevant information of said S9 session.

S9 session establishing method of the present invention, system and PCRF do not have under the situation of interface with visit ground mobile net elements at visit ground PCRF (being V-PCRF), trigger V-PCRF by ownership place PCRF (being H-PCRF) and set up S9 session.

Description of drawings

Fig. 1 is the EPS system architecture;

Fig. 2 is a kind of framework of prior art UE through H (e) NB access mobile core network;

Fig. 3 is a kind of roaming framework of prior art UE through H (e) NB access mobile core network;

Fig. 4 is the local route roaming scence one of prior art UE through the non-3GPP network S2b interface access mobile core network architecture;

Fig. 5 is the local route roaming scence two of prior art UE through the non-3GPP network S2b interface access mobile core network architecture;

Fig. 6 is the local route roaming scence of prior art UE through the non-3GPP network S2c interface access mobile core network architecture;

Fig. 7 is that flow process is set up in the S9 session that prior art V-PCRF initiates;

Fig. 8 is that flow scheme one is set up in the S9 session that H-PCRF of the present invention initiates;

Fig. 9 is that flow scheme two is set up in the S9 session that H-PCRF of the present invention initiates.

Embodiment

The main thought of S9 session establishing method of the present invention, system and PCRF is not have under the situation of interface with visit ground mobile net elements at visit ground PCRF (being V-PCRF), triggers V-PCRF by ownership place PCRF (being H-PCRF) and sets up S9 session.

Preferably, ownership place PCRF triggering V-PCRF sets up S9 session has following two kinds of schemes:

When scheme one, ownership place PCRF set up S9 session in decision-making, send and set up relevant raw information with S9 session, PCRF generates the relevant information of S9 session by visit ground, comprising:

A1) ownership place PCRF sends to visit ground PCRF and sets up relevant raw information with S9 session;

Among the present invention; To set up relevant raw information with S9 session comprise: indication is set up in ID (such as UE NAI, perhaps IMSI), PDN link information, Diameter session identification, session identification, binding session indication, credit control request type and S9 session.

More than said PDN link information refer to be used to show the information that a specific PDN connects of pointing to, understandably, when the only corresponding PDN of certain PDN sign connected, the PDN link information referred to the PDN sign; When corresponding several PDN of certain PDN sign connected, the PDN link information comprised PDN sign and PDN connection identifier.

A2) said visit ground PCRF receives and sets up the relevant relevant information of raw information generation S9 session according to said with S9 session, and sets up S9 session.

Among the present invention, the information that S9 session is relevant comprises session identification, ID, sub-session execution information, Diameter session identification and credit control request type.

When scheme two, ownership place PCRF set up S9 session in decision-making, the information that S9 session is relevant, and send to the PCRF execution of visit ground, comprising:

B1) ownership place PCRF generates the relevant information of S9 session when S9 session is set up in decision-making, and sends to visit ground PCRF;

B2) said visit ground PCRF receives and sets up S9 session according to the relevant information of said S9 session.

For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.

The description of setting up for the S9 session among the following embodiment is a prior art, for the scheme integrality is considered, also it has been carried out relevant content description.

Embodiment 1

This embodiment 1 describes H-PCRF to trigger the scheme one that V-PCRF initiates S9 session foundation; In this embodiment 1, S9 session is set up in the H-PCRF decision-making, and sends RAR message to V-PCRF; Carry in the message with S9 session and set up relevant raw information; Comprise: ID, the PDN sign, information such as indication and session identification are set up in PDN connection identifier, Diameter session identification, binding session indication, credit control request type, S9 session; As shown in Figure 8, this flow process comprises:

Step 101: after H-PCRF receives the message that related network elements (comprising: BBERF, ePDG, network elements such as PCEF) sends, through authenticated/authorized request again (Re-Auth-Request, RAR) message is transmitted to V-PCRF with relevant information;

H-PCRF handles after receiving (message sets up request such as: gateway control session or request message is set up in the IP-CAN session) accordingly, and is specific as follows:

H-PCRF is according to receiving the ID in the information judges whether the S9 session exists: 1) if there is the S9 session, then the credit control request type is for upgrading solicited status; If the S9 session exists; Then, judge whether to exist S9 session: if there is not S9 session, even perhaps there is S9 session further according to PDN sign and PDN connection identifier; But the binding session that comprises indication is set as " session delays to bind ", then needs newly-built S9 session; 2) if there is not the S9 session; Then the credit control request type is the initial request state, and H-PCRF sets up the session indication through the request of sending, and perhaps also comprises request and sets up session label information to V-PCRF; Come newly-built S9 session, and also need newly-built S9 session.

H-PCRF passes through authenticated/authorized request (Re-Auth-Request again; RAR) message is transmitted to V-PCRF with relevant information; The words of if desired newly-built S9 session; Then comprise in the message and followingly set up relevant raw information with S9 session: indication, session identification are set up in ID (such as UE NAI, perhaps IMSI), PDN sign, PDN connection identifier, Diameter session identification, binding session indication, credit control request type, S9 session, wherein; PDN identifies, the PDN connection identifier is optional carries, and also can comprise other information of the prior art in this message; In the time of need not setting up S9 session, then may carry (specifically referring to TS29.215) such as QoS installation, sub-session decision information in the message.

Wherein, the Diameter session identification is the Diameter session identification of H-PCRF according to the correspondence of gateway control session request message of receiving or the foundation of IP-CAN conversation request message, and the Diameter basic agreement can guarantee that this session identification is that the overall situation is unique.

When H-PCRF receives the BBERF request message of making a fresh start, may comprise the binding session indication, and be set as " session delays to bind ", such as: the related same IP-CAN session of new gateway control session with already present gateway control session.

When existing a plurality of PDN to connect under the PDN sign, on behalf of a PDN, the PDN sign be connected with the PDN connection identifier.

After step 102:V-PCRF receives RAR message; Set up indication according to whether carrying S9 session in the RAR message; Carry out concrete processing: if do not carry; Then carry out normal RAR Message Processing according to prior art, and reply again authenticated/authorized reply (Re-Auth-Answer, RAA) message is given H-PCRF; If carry, then reply RAA message and give H-PCRF, can only carry session identification in the message, and continue step 103;

Step 103: set up indication if carry S9 session in the RAR message, V-PCRF sends credit control request (CC-Request, CCR) message to H-PCRF; Comprise the relevant information of S9 session in the message; Specifically comprise session identification, ID (like IMSI), information is carried out in sub-session; The Diameter session identification, information such as credit control request type; In addition, also possibly comprise other information of the prior art in this message.

It is following that V-PCRF sets up S9 session operating principle:

V-PCRF searches this UE and whether has corresponding S9 session according to the credit control request type in the request message of receiving, and carries out corresponding operation:

A) if the credit control request type is the renewal solicited status, and comprise S9 session foundation indication, then V-PCRF will distribute a new S9 session identification; Being included in sub-session carries out among the information A VP; And also comprise sub-session operation A VP etc. among this AVP, wherein, sub-session operation A VP is made as " foundation " state; If the binding session indication information is arranged, then the binding session indication also is comprised among the sub-session execution AVP.If carry PDN sign, PDN connection identifier, then be included in sub-session respectively and carry out among the called tation sign AVP and PDN connection identifier AVP of information A VP.

B) if the credit control request type is the initial request state, then V-PCRF is newly-built S9 session, and comprises the words that indication is set up in S9 session; V-PCRF will be on the basis of newly-built S9 session, a newly-built again S9 session, and distribute a new S9 session identification; Being included in sub-session carries out among the information A VP; And also comprise sub-session operation A VP etc. among this AVP, wherein, the sub-session operation in the sub-session execution information is made as " foundation " state.If carry PDN sign, PDN connection identifier, then be included in sub-session respectively and carry out among the called tation sign AVP and PDN connection identifier AVP of information A VP.

Step 104:H-PCRF receives CCR message, and (CC-Answer, CCA) message comprise tactful relevant information in the message, such as session identification, sub-session decision information to reply Credit Control Answer to V-PCRF;

H-PCRF is through the Diameter session identification, and H-PCRF confirms that the request that V-PCRF initiates is relevant with step 101, according to the information of obtaining from V-PCRF and from other user related informations of Diameter acquisition conversation; Formulate the PCC strategy; And (CC-Answer, CCA) message comprise tactful relevant information in the message to reply Credit Control Answer to V-PCRF; Such as: session identification, sub-session decision information.

Related S9 session of H-PCRF and corresponding D iameter session, wherein, the Diameter session comprises: gateway control session, IP-CAN session.

After V-PCRF receives Credit Control Answer message,, transmit relevant strategy, comprising: BPCF to related network element according to the sub-session decision information in the message.

Among the above embodiment, H-PCRF and V-PCRF replacedly, also can transmit information through newly-increased message through existing RAR, RAA interacting message.

In order to realize above scheme; The system that the present invention also provides a kind of S9 session to set up; The sub-session of PCRF of this system sets up module with comprising the sending module of ownership place "Policy and Charging Rules Function (PCRF), the receiver module of visiting ground PCRF and visit, wherein:

Preferably, said and S9 session are set up relevant raw information and are sent through authenticated/authorized request again (RAR) message.

Saidly set up relevant raw information with S9 session and comprise: indication is set up in ID (such as UE NAI, perhaps IMSI), PDN link information, Diameter session identification, session identification, binding session indication, credit control request type and S9 session.

Further, said Diameter session identification is the Diameter session identification of said ownership place PCRF according to the correspondence of gateway control session request message of receiving or the foundation of IP-CAN conversation request message.

The receiver module of said visit ground PCRF is used to receive that said ownership place PCRF sends sets up relevant raw information with S9 session;

Further; Said ownership place PCRF also comprises message transmission trigger module; Be used for after the message of packet data gateway (ePDG) that receives bearing binding and event reporting function (BBERF), evolution or grouped data network gateway (P-GW) transmission, triggering said sending module and sending information.

In addition, the present invention also provides a kind of "Policy and Charging Rules Function (PCRF), and this PCRF comprises that sending module, receiver module and sub-session set up module, wherein:

Said and S9 session are set up relevant raw information and are comprised that ID (such as UE NAI, perhaps IMSI), PDN link information, Diameter session identification, session identification, binding session indication, credit control request type and S9 session set up indication.

As previously mentioned, said Diameter session identification is the Diameter session identification of said ownership place PCRF according to the correspondence of gateway control session request message of receiving or the foundation of IP-CAN conversation request message.

Receiver module, said PCRF are positioned at when ground visit, are used to receive that said ownership place PCRF sends sets up relevant raw information with S9 session; And

Module is set up in sub-session, when said PCRF is positioned at visit, is used for setting up the relevant relevant information of raw information generation S9 session according to said with S9 session, and sets up S9 session.

Preferably; PCRF also comprises message transmission trigger module; When said PCRF is positioned at ownership place; Be used for after the message of packet data gateway (ePDG) that receives bearing binding and event reporting function (BBERF), evolution or grouped data network gateway (P-GW) transmission, triggering said sending module and sending information.

Embodiment 2

This embodiment 2 describes H-PCRF to trigger the scheme two that V-PCRF initiates S9 session foundation, and in this embodiment 2, H-PCRF receives after the message trigger of related network elements; According to the parameter information that the message of receiving is carried, S9 session is set up in decision-making, and generates the relevant information of S9 session; Send RAR message to V-PCRF, carry the relevant information of S9 session in the message, comprising: ID; Information, credit control request type, Diameter session identification are carried out in sub-session; Be that with the difference of embodiment 1 H-PCRF generates the relevant information of S9 session, as shown in Figure 9, this flow process specifically comprises:

Step 201:H-PCRF receive the message that related network elements sends (such as: gateway control session sets up request or request message is set up in the IP-CAN session) after; S9 session is set up in decision-making, and the information that the S9 session that generates is relevant is added in the RAR message and sent to V-PCRF;

Comprise in this message: information such as information, Diameter session identification, credit control request type, session identification are carried out in ID, sub-session.

S9 session is set up in the H-PCRF decision-making, and concrete principle of decision-making is following:

H-PCRF searches this UE and whether has corresponding S9 session according to the ID in the request message of receiving, and carries out corresponding operation:

A) if there is the S9 session, then the credit control request type is for upgrading solicited status; If do not comprise PDN connection identifier and PDN sign in the request message; Then upgrade existing S9 session related information; And if this request message is new gateway control session request; And when searching its related gateway control session according to ID, then many BBERF action AVP are made as " foundation " state and access network gateway address AVP is set up, and are included in the AVP of command-levels; Otherwise, connect whether there has been corresponding S9 session based on this PDN of these information searchings, and carry out corresponding operation:

If A1. can not find corresponding S9 session; Then H-PCRF will distribute a new S9 session identification, be included in sub-session and will carry out among the information A VP, and also comprise sub-session operation A VP etc. among this AVP; Wherein, sub-session operation A VP is made as " foundation " state.

A. in H-PCRF receives the request message of new gateway control session, comprise the binding session indication and be set as " session delays to bind "; And when searching its related gateway control session according to PDN sign and PDN connection identifier; Then H-PCRF will distribute a new S9 session identification, be included in sub-session and will carry out among the information A VP, and also comprise sub-session operation A VP etc. among this AVP; Wherein, sub-session operation A VP is made as " foundation " state;

B. work as H-PCRF and receive the BBERF request message of making a fresh start; And during the related same IP-CAN session of new gateway control session with already present gateway control session; But when not having " session delays to bind indication "; Then V-PCRF revises already present S9 session related information, and wherein, sub-session operation information is made as " modification " state; Many BBERF action AVP (being made as " foundation " state) and access network gateway address AVP also are comprised in sub-session and carry out among the AVP.

C. when H-PCRF receive be the IP-CAN conversation request time, then V-PCRF revises already present S9 session related information, wherein, sub-session operation information is made as " modification " state.

B) if there is not the S9 session; Then H-PCRF is with newly-built S9 session, and the credit control request type is the initial request state, and further judge whether to comprise PDN connection identifier and PDN sign (such as: S2a interface, S5/S8GTP/PMIP and S2b interface scene can be carried these information); If comprise; Then H-PCRF will distribute a new S9 session identification, be included in sub-session and will carry out among the information A VP, and also comprise sub-session operation A VP etc. among this AVP; Wherein, sub-session operation A VP is made as " foundation " state.

In addition, if carry PDN sign, PDN connection identifier, then be included in sub-session respectively and carry out among the called tation sign AVP and PDN connection identifier AVP of information A VP.

After step 202:V-PCRF receives RAR message,, carry out concrete processing according to RAR message neutron session operation information state; Like fruit session operation information state is " modification " state, then carries out normal RAR Message Processing according to prior art, and replys RAA message and give H-PCRF; Like fruit session operation information state is " foundation " state, then replys again authenticated/authorized and replys that (Re-Auth-Answer, RAA) message is given H-PCRF, can only carry session identification in the message, and continues step 203.

After step 203:V-PCRF receives RAR message, from RAR message, extract the relevant information of S9 session, carry out the foundation operation of S9 session; Send CCR message to H-PCRF, comprise session identification in the message, and ID (such as: UE NAI; Perhaps IMSI); Information, Diameter session identification, information such as credit control request type are carried out in sub-session;

Step 204:H-PCRF formulates the PCC strategy, and replys CCA message to V-PCRF, comprises tactful relevant information in the message;

H-PCRF receives CCR message, and through the Diameter session identification, H-PCRF confirms that the request of V-PCRF initiation is relevant with step 201; And according to the information of obtaining from V-PCRF and from other user related informations of Diameter acquisition conversation; Formulate the PCC strategy, and reply CCA message, comprise tactful relevant information in the message to V-PCRF; Such as: session identification, sub-session decision information.

After V-PCRF receives CCA message,, transmit relevant strategy, comprising: BPCF to related network element according to the sub-session decision information in the message.

In order to realize above embodiment 2; The present invention also provides a kind of S9 session building system; This system comprises that the receiver module of the sending module of decision-making module, ownership place PCRF, visit ground PCRF is set up in the sub-session of ownership place "Policy and Charging Rules Function (PCRF) and module is set up in the sub-session of visit ground PCRF, wherein:

Preferably, the information that said S9 session is relevant comprises session identification, ID, sub-session execution information, Diameter session identification and credit control request type.

Preferably, the information that said S9 session is relevant is sent through authenticated/authorized request again (RAR) message.

Further; Said ownership place PCRF also comprises sub-session decision-making trigger module; Be used for after the message that the packet data gateway (ePDG) that receives bearing binding and event reporting function (BBERF), evolution or grouped data network gateway (P-GW) send, trigger said sub-session and set up decision-making module and make a strategic decision.

In addition, the present invention also provides a kind of "Policy and Charging Rules Function (PCRF), and this PCRF comprises:

Further; Said PCRF also comprises sub-session decision-making trigger module; When said PCRF is positioned at ownership place; Be used for after the message that the packet data gateway (ePDG) that receives bearing binding and event reporting function (BBERF), evolution or grouped data network gateway (P-GW) send, trigger said sub-session and set up decision-making module and make a strategic decision.

The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each module in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

Claims

1. a S9 session establishing method is characterized in that, this method triggers visit ground PCRF by ownership place "Policy and Charging Rules Function (PCRF) and sets up S9 session, comprising:

2. the method for claim 1 is characterized in that: saidly set up relevant raw information with S9 session and send through authenticated/authorized request again (RAR) message.

3. the method for claim 1 is characterized in that: saidly set up relevant raw information with S9 session and comprise: indication is set up in ID, PDN link information, Diameter session identification, session identification, binding session indication, credit control request type and S9 session; The information that said S9 session is relevant comprises session identification, ID, sub-session execution information, Diameter session identification and credit control request type.

4. the method for claim 1; It is characterized in that: said ownership place PCRF sends said with before relevant raw information is set up in S9 session, receives the triggering of message of packet data gateway (ePDG) or grouped data network gateway (P-GW) transmission of bearing binding and event reporting function (BBERF), evolution.

5. a S9 session building system is characterized in that, this system comprises:

6. system as claimed in claim 5 is characterized in that: saidly set up relevant raw information with S9 session and comprise: indication is set up in ID, PDN link information, Diameter session identification, session identification, binding session indication, credit control request type and S9 session; The information that said S9 session is relevant comprises session identification, ID, sub-session execution information, Diameter session identification and credit control request type.

7. a "Policy and Charging Rules Function (PCRF) is characterized in that, this PCRF comprises:

8. PCRF as claimed in claim 7 is characterized in that: saidly set up relevant raw information with S9 session and comprise: indication is set up in ID, PDN link information, Diameter session identification, session identification, binding session indication, credit control request type and S9 session; The information that said S9 session is relevant comprises session identification, ID, sub-session execution information, Diameter session identification and credit control request type.

9. a S9 session establishing method is characterized in that, this method triggers visit ground PCRF by ownership place "Policy and Charging Rules Function (PCRF) and sets up S9 session, comprising:

10. method as claimed in claim 9 is characterized in that: the information that said S9 session is relevant is sent through authenticated/authorized request again (RAR) message.

11. method as claimed in claim 9 is characterized in that: the information that said S9 session is relevant comprises session identification, ID, sub-session execution information, Diameter session identification and credit control request type.

12. a S9 session building system is characterized in that, this system comprises:

13. system as claimed in claim 12 is characterized in that: the information that said S9 session is relevant comprises session identification, ID, sub-session execution information, Diameter session identification and credit control request type.

14. a "Policy and Charging Rules Function (PCRF) is characterized in that, this PCRF comprises:

15. PCRF as claimed in claim 14 is characterized in that: the information that said S9 session is relevant comprises session identification, ID, sub-session execution information, Diameter session identification and credit control request type.