CN101742471B - A kind of method that data flow and Access Network connect and bind - Google Patents
A kind of method that data flow and Access Network connect and bind Download PDFInfo
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Abstract
The invention discloses a kind of method that data flow and Access Network connect and bind, the method comprises: policy charging rule functional entity PCRF determines that the Access Network of business datum flow transmission connects, and the described Access Network determined is connected inform to strategy and charging execution function entity PCEF, described PCEF and described business data flow is connected with Access Network binds.By the method for the invention, overcome the deficiencies in the prior art, make when user equipment (UE) is simultaneously by multiple Access Network access, the Access Network of data flow to its transmission the most applicable can correctly connect by P-GW; This invention also solves simultaneously and P-GW/PCRF is not being carried out under the prerequisite that significantly function strengthens, realize the problem that business data flow transmits in correct Access Network, thus reduce the difficulty of realization, decrease existing network operation cost and risk, be conducive to the application as early as possible of EPS network.
Description
Technical field
The present invention relates to the communications field, be specifically related to moving communicating field.
Background technology
Third generation partner program (3rdGenerationPartnershipProject, referred to as 3GPP) grouping system (EvolvedPacketSystem of evolution, referred to as EPS) by the universal mobile telecommunications system land radio access web (EvolvedUniversalTerrestrialRadioAccessNetwork of evolution, referred to as E-UTRAN), mobile management unit (MobilityManagementEntity, referred to as MME), gateway (ServingGateway, S-GW), grouped data network gateway (PacketDataNetworkGateway, referred to as P-GW or PDNGW), home subscriber server (HomeSubscriberServer, referred to as HSS), authentication and authorization charging (the Authentication of 3GPP, AuthorizationandAccounting, referred to as AAA) server, "Policy and Charging Rules Function (PolicyandChargingRulesFunction, referred to as PCRF) entity and other support nodes composition.
Fig. 1 is the schematic diagram of the system architecture of EPS according to correlation technique, and as shown in Figure 1, MME is responsible for the related work of the chain of command such as process and the contextual management of user's mobile management of mobile management, Non-Access Stratum signaling; S-GW is the accessing gateway equipment be connected with E-UTRAN, forwarding data between E-UTRAN and P-GW, and is responsible for carrying out buffer memory to pending datas such as pagings; P-GW is then the borde gateway of EPS and packet data network (PacketDataNetwork, referred to as PDN) network, be responsible for PDN access and between EPS and PDN the function such as forwarding data; PCRF is "Policy and Charging Rules Function entity, it is by receiving interface Rx and carrier network agreement (InternetProtocol, referred to as IP) business network be connected, obtain business information, in addition, it is connected with the gateway device in network by Gx/Gxa/Gxc interface, be responsible for the foundation initiating IP carrying, ensure the service quality (QualityofService, referred to as QoS) of business datum, and carry out charging control.
EPS supports the intercommunication with non-3 GPP system, and wherein, pass through S2a/b/c Interface realization with the intercommunication of non-3 GPP system, 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 is divided into trusted non-3 gpp IP access and trustless non-3 gpp IP accesses.Trusted non-3 gpp IP is accessed and can be directly connected with P-GW by S2a interface; Trustless non-3 gpp IP access need through the packet data gateway (EvolvedPacketDataGateway of evolution, referred to as ePDG) be connected with P-GW, interface between ePDG and P-GW is S2b, S2c provides subscriber equipment (UserEquipment, referred to as UE) control relevant to the user face between P-GW and mobility support, its mobility management protocol supported is the mobile IP v 6 (MoblieIPv6SupportforDualStackHostsandRouters, referred to as DSMIPv6) supporting two stack.
Among EPS, strategy and charge execution function (PolicyandChargingEnforcementFunction, referred to as PCEF) entity are present in P-GW, Gx interface (see Fig. 1) exchange message between PCRF and P-GW.When interface when between P-GW and S-GW is based on PMIPv6, S-GW also has bearing binding and event reporting function (BearerBindingandEventReportFunction, referred to as BBERF) entity carries out QoS control to business data flow, by Gxc interface (see Fig. 1) exchange message between S-GW and PCRF.When by the access of trusted non-3 GPP access system, the trusted non-3 GPP access network Central Shanxi Plain also resident BBERF.By Gxa interface (see Fig. 1) exchange message between trusted non-3 GPP access gateway and PCRF.When UE roams, S9 interface is as the interface of ownership place PCRF and visited place PCRF, simultaneously for UE provides the application function (ApplicationFunction of business, referred to as AF), sent the business information being used for generating strategy with charging control (PolicyandChargingControl, referred to as PCC) strategy to PCRF by Rx interface.In 3 gpp, corresponding PDN network can be found by APN (AccessPointName, referred to as APN).Usually UE to PDN network connection is called that an IP connects Access Network (IPConnectivityAccessNetwork, referred to as IP-CAN) session.In the process setting up IP-CAN session, BBERF and PCEF respectively and set up Diameter session between PCRF, transmits the policy, billing information that controls this IP-CAN session and the information etc. for generating strategy by these Diameter sessions.
EPS supports that UE accesses a PDN by multiple Access Network, i.e. MultipleAccess (multiple access) simultaneously.As shown in Figure 2, UE simultaneously, under the covering of non-3 gpp and 3GPP access, is linked into PDN by non-3 gpp IP Access Network and 3GPP Access Network by same P-GW.
What Fig. 3 described is after in two coverages that UE is in 3GPP Access Network and trusted non-3 GPP access network, and UE is established to the flow process of the connection giving tacit consent to PDN simultaneously by 3GPP Access Network and trusted non-3 GPP access network.When wherein being accessed by 3GPP, between S-GW and P-GW, adopt PMIPv6 agreement, time wherein by trusted non-3 GPP access, between trusted non-3 GPP access webmaster and P-GW, adopt PMIPv6 agreement.Its concrete steps are described below:
Step 301, UE sends Attach Request message to MME;
Step 302, MME initiates the identifying procedure to UE, exchanges authentication-related information as required between MME and HSS; After authentication success, MME launch position more new technological process, the subscription data of UE is sent to MME by HSS.In verification process, the selection information of P-GW is sent to MME by HSS, comprises acquiescence APN.MME selects P-GW according to APN, and MME selects S-GW simultaneously;
Step 303, MME sends default bearing to S-GW and sets up request message, and wherein, this default bearing sets up the IP address that request message carries the P-GW of APN and selection;
Step 304, the S-GW of the resident BBERF of having carries mark NAI, the APN of UE in " gateway control session sets up instruction " message;
Step 305, PCRF is according to the formulation such as subscription data, network strategy, the carrying attribute PCC of user is regular and Qos is regular, simultaneously, also corresponding event trigger may be formulated, QoS rule and event trigger are sent to S-GW by " gateway control session is set up and confirmed " message by PCRF, and S-GW installs QoS rule and event trigger;
Step 306, S-GW sends " agent binding update " request message to P-GW, wherein, should carry NAI, APN in " agent binding update " request message;
Step 306 just can be able to send after receiving step 303 message, need not the response of waiting step 305.
Step 307, resident have the P-GW of PCEF to send " instruction of IP-CAN session establishment " message to PCRF, wherein, " instruction of IP-CAN session establishment " message should carry the IP address that NAI, APN and P-GW are UE distribution; " instruction of IP-CAN session establishment " message is associated with " gateway control session is set up and the indicated " message in step 305 by NAI, APN by PCRF, thus the information association two message set up at PCRF is to same IP-CAN session;
Step 308, PCRF returns " confirmation of IP-CAN session establishment " message to P-GW, and wherein, " confirmation of IP-CAN session establishment " message should carry corresponding PCC rule and event trigger, PCEF installs PCC rule and event trigger;
If the information of carrying in IP-CAN session establishment Indication message in step 307 causes QoS rule to there occurs change, PCRF provides message that new QoS rule is sent to trusted non-3 GPP access gateway by by gateway control and QoS rule, if event trigger also there occurs change, there is provided new event trigger, this message can send with step 308 simultaneously.BBERF returns acknowledge message after receiving message.
Step 309, P-GW returns " agent binding confirmation " message to S-GW, wherein, " agent binding confirmation " message should carry the IP address that P-GW is UE distribution;
Step 310, S-GW returns default bearing to MME and sets up acknowledge message, and wherein, this default bearing sets up the IP address that acknowledge message carries UE;
Step 311, mutual between MME, eNodeB, UE, set up radio bearer;
Step 312, after the radio bearer is established, MME sends more new bearer request to S-GW, the address information etc. of notice eNodeB, and S-GW returns response message;
Step 313, UE performs specific non-3 GPP access procedure, access trusted non-3 GPP access network;
Step 314, after UE is linked into trusted non-3 GPP access network, carries out EPS access authentication to HSS/AAA request; After HSS/AAA receives the request of EPS access authentication, certification is carried out to the UE sending request; After HSS/AAA completes the certification to UE, send to trusted non-3 GPP access gateway and return the signing APN of P-GW and UE that select in 3GPP access, comprise acquiescence APN;
Step 315, after authentication success, the attachment flow of layer 3 is triggered, and UE carries MultipleAccess instruction to the message that trusted IAD sends;
Step 316, resident have the trusted non-3 GPP access gateway of BBERF sending " gateway control session sets up instruction " message to PCRF, wherein, mark NAI, APN and the MultipleAccess instruction of UE is carried in " gateway control session sets up instruction " message;
Step 317, PCRF indicates according to MultipleAccess, judges that UE is multiple access, and according to NAI, APN this message carried out associating with the message of 307 steps with 304 thus, the information association three message set up at PCRF is to same IP-CAN session.Further, PCRF to moving to by the business formulation PCC of the IP-CAN session of non-3 GPP access is regular and QoS is regular, meanwhile, also may formulate corresponding event trigger according to the subscription data, network strategy, carrying attribute etc. of user; The QoS of these new formulations rule and event trigger are sent to BBERF by " gateway control session is set up and confirmed " message by PCRF, and BBERF installs QoS rule and event trigger;
Step 318, trusted non-3 GPP access gateway sends " agent binding update " request message to P-GW, wherein, NAI, APN and MultipleAccess instruction should be carried in " agent binding update " request message, step 318 just can be able to send after receiving step 315 step message, need not the response of waiting step 317;
Step 319, resident have the P-GW of PCEF to adopt the Diameter session of setting up in step 307, sends " instruction of IP-CAN session modification " message, wherein, be somebody's turn to do " instruction of IP-CAN session modification " message to PCRF;
Step 320, PCRF returns " confirmation of IP-CAN session modification " message to P-GW, and wherein, carry the PCC rule and event trigger formulated in 317 steps in " confirmation of IP-CAN session modification " message, P-GW upgrades PCC rule and event trigger.PCRF, likely according to the information that step 319 is carried, upgrades PCC rule again;
If the information of carrying in IP-CAN session modification Indication message in step 319 causes the QoS rule formulated in step 317 to there occurs change, PCRF provides message that new QoS rule is sent to trusted non-3 GPP access gateway by by gateway control and QoS rule, if event trigger also there occurs change, there is provided new event trigger, this message can send with step 320 simultaneously.Gateway control is returned and QoS rule provides acknowledge message after trusted non-3 GPP access gateway receives message.
Step 321, the information such as the IP address of oneself are saved in HSS by P-GW, register multiple access in HSS;
Step 322, P-GW returns " agent binding confirmation " message to trusted non-3 GPP access gateway, wherein, should carry the IP address that P-GW is UE distribution in " agent binding confirmation " message;
Step 323, trusted non-3 GPP access gateway returns response message to UE, and wherein, this response message carries the IP address of UE;
By above flow process, PCRF is for carrying out policy and charging control by the IP-CAN session of 3GPP access and non-3 GPP access simultaneously.
In such a scenario, P-GW is that UE distributes an IP address, namely only has an IP-CAN session between UE and PDN.According to the different qualities of business, P-GW or PCRF determines IP traffic sends to UE by which Access Network.Such as, when non-3 GPP access network is WiFi, the business data flow of Http and Ftp just can pass through WiFi Access Network, and meanwhile the business data flow of VoIP just can send to UE by 3GPP.The lower advantage of WiFi rate can be played for the business that this requirement of real-time of Http and Ftp is lower like this, and the QoS control of 3GPP can be played for the business that this requirement of real-time of VoIP is higher, the good advantage of mobile management.
This just brings problem a: P-GW how correctly business data flow can be sent to the Access Network of its transmission the most applicable, and namely business data flow is connected with Access Network and how realizes binding.Prior art also not yet addresses this problem.
On the other hand, if operator is when network design, P-GW and PCRF that do not wish significantly to upgrade decides according to business different attribute the decision-making capability that business datum flows through Access Network transmission, only need is the corresponding resource of service data transmission flow assignment in corresponding Access Network, at this moment how business data flow correctly can be sent to correct (for its Resources allocation) Access Network and connect by P-GW, and prior art also not yet solves.
Summary of the invention
The present invention aims to provide a kind of method that data flow and Access Network connect and bind, to solve when user equipment (UE) is simultaneously by multiple Access Network access, and the problem of Access Network connection that data flow can correctly transmit to it by P-GW.
In order to solve the problem, the invention provides a kind of method that data flow and Access Network connect and bind, the method comprises:
Policy charging rule functional entity PCRF determines that the Access Network of business datum flow transmission connects, and is connected by the described Access Network determined and inform to strategy and charging execution function entity PCEF, described PCEF and be connected with Access Network by described business data flow and bind.
Further, the described Access Network connection determined is informed to described PCEF and by described PCEF, described business data flow is connected the concrete grammar carrying out binding with Access Network and comprises by described PCRF:
Described PCRF sends message to described PCEF, carries strategy and charging control PCC rule and binding and indicate in described message; Described PCEF installs described PCC rule, and is bound regular for PCC to be connected with target access network according to described binding instruction.
Further, the described Access Network connection determined is informed to described PCEF and by described PCEF, described business data flow is connected the concrete grammar carrying out binding with Access Network and comprises by described PCRF:
Described PCRF sends message to described PCEF, carries binding instruction in described message; Described PCEF preserves this binding instruction, and is tied to target access network to the PCC rule that the IP of subscriber equipment connects the relevant business data flow of Access Network session according to described binding instruction connects what issue after described PCRF.
Further, after PCC rule to be connected with target access network to bind according to binding instruction by described PCEF, described method comprises further, when described PCEF detects the data flow applying described PCC rule, data flow is connected to the target access network bound with described PCC rule by described PCEF.
Further, before described PCRF sends message to described PCEF, described method also comprises: described PCRF determines to transmit according to collocation strategy the target access network that data flow uses and connects, and formulate corresponding PCC rule and service quality QoS regular.
Further, after described PCRF formulates PCC rule and QoS rule, described method also comprises: the bearing binding during described QoS rule sends to target access network to connect by message by described PCRF and event reporting function entity B BERF; Described BBERF installs described QoS rule, and returns acknowledge message.
Further, during the binding that described PCRF update data stream is connected with Access Network, PCRF formulates new PCC rule and QoS rule, message is sent to PCEF, carry new PCC rule in described message and described PCC rule is connected the binding of carrying out binding with target access network indicates, delete the QoS rule of BBERF in the target access network connection of source, in connecting to fresh target Access Network, BBERF issues new QoS rule simultaneously.
Further, binding instruction is sent to described PCEF by described PCRF, wherein, carries unique information distinguished described Access Network and connect in described binding instruction.Described Access Network connects and carrys out unique identification by one of following information: procotol connects access network type and/or radio access technology types, be used to indicate internet protocol address that described Access Network connects, be used to indicate the Diameter session identification that described Access Network connects, described UE accesses the Care-of Address CoA obtained when target access network connects.
Further, described binding instruction is directly defined in described PCC rule, or to be defined in outside described PCC rule and to issue in same message with described PCC rule.
Further, the factor that described PCRF considers when determining that the target access network that transmission data flow uses connects according to collocation strategy comprises: the attribute that the CAMEL-Subscription-Information of user, network strategy, business information, each Access Network connect and described UE select the instruction of target access network connection, the reason of migration that transmit data flow.
Adopt the method for the invention, PCRF carries PCC rule by sending to PCEF and described PCC rule is connected the binding of carrying out binding with target access network indicates, described PCC to be connected with target access network according to binding instruction and to bind by PCEF, thus achieve the data flow of the described PCC rule of application to be connected with target access network and bind, make when user equipment (UE) is simultaneously by multiple Access Network net access, data flow can correctly connect to its Access Network transmitted by P-GW, thus avoids the generation of mistake.
Meanwhile, this invention also solves under the prerequisite of P-GW/PCRF not being carried out to significantly function enhancing, realize the problem that business data flow transmits in correct Access Network.Realizing the binding of business data flow and Access Network when significantly not changing P-GW/PCRF, greatly reducing the difficulty of realization, saved design cost, decrease existing network operation cost and risk, be conducive to the application as early as possible of EPS network.
Accompanying drawing explanation
Accompanying drawing illustrates and is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the system architecture of EPS according to prior art;
Fig. 2 is the scene graph of the multiple access according to prior art;
Fig. 3 is the flow chart of the multiple access according to prior art;
Fig. 4 is the flow chart of the embodiment of the present invention one;
Fig. 5 is the flow chart of the embodiment of the present invention two;
Fig. 6 is the flow chart of the embodiment of the present invention three;
Fig. 7 is the flow chart of the embodiment of the present invention four.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, can better understand the present invention to make those skilled in the art and can be implemented, but illustrated embodiment is not as a limitation of the invention.
Embodiment one
The present embodiment describe be as shown in Figure 3 flow process attachment.The UE of Fig. 4 described by the present embodiment, by E-UTRAN and trusted non-3 GPP access network multiple access, after setting up IP connection Access Network IP-CAN session, accesses new business, the flow chart of the process of PCRF distributing policy charging rule.As shown in Figure 4, its concrete steps are:
Step 401, the business that UE request access is new, to providing the AF1 of business information to send a request message, after AF1 receiving message, setting up new AF session and providing business information, and corresponding business data flow is SDF1.Further, the instruction that UE selects the target access network of transmission SDF1 to connect can also be carried in described request message;
Step 402, AF1 sends service application message to PCRF, and described message carries the IP address of the UE of access service, and further, described message can also carry the instruction of the mark of UE and the target access network connection of UE selection transmission SDF1;
Step 403, PCRF preserves business information;
Step 404, PCRF returns acknowledge message to AF1;
Step 405, the IP address of PCRF according to UE and the mark of UE, identify the IP-CAN session that flow process in Fig. 3 is set up.Now, PCRF knows that UE is by trusted non-3 GPP access network (as WLAN) and E-UTRAN multiple access.PCRF determines that the traffic performance such as the instruction that the target access network of transmission SDF1 connects and business information formulates PCCRules1, QoSRules1 according to the CAMEL-Subscription-Information of user, network strategy, UE, and determines to transmit this business data flow by E-UTRAN Access Network;
Step 406, because PCRF determines that this business is transmitted by E-UTRAN, so PCRF provides message to send QoSRules1 to the BBERF in S-GW by gateway control and QoS rule;
Step 407, BBERF installs QoSRules1, E-UTRAN and performs corresponding strategy.BBERF returns acknowledge message;
Step 408, PCRF provides message to send PCCRules1 to the PCEF in P-GW by policy charging rule, binding instruction is carried in message, it indicates that, when PCEF detects the business data flow of application PCCRules1, these business data flows will send to the connection by E-UTRAN Access Network.This binding instruction unique distinguished information that each Access Network connects by carrying and is identified the Access Network that PCRF determines and connect, such as, this binding instruction can carry IP-CAN type and/or wireless access type RATType, here can value be 3GPP_EPS, can also be the IP address of S-GW or BBERF, can also be the session identification of the Diameter session of setting up between S-GW and PCRF.When realizing, this binding indicates, and directly can be defined in PCCRules and (namely directly expand existing PCCRules), also can be defined in outside PCCRules;
Step 409, PCEF installs PCCRules1 and according to binding instruction, PCC rule is connected with E-UTRAN Access Network and binds, and return acknowledge message.
In other embodiments, if PCRF determines that this business will be transmitted by trusted non-3 GPP access network, so the BBERF to the trusted non-3 GPP access network Central Shanxi Plain is issued QoSRules1 by PCRF, issues PCCRules1 and binding instruction to the PCEF in P-GW simultaneously.Binding instruction shows, when PCEF detects the business data flow of application PCCRules1, these business data flows will send to the connection accessed by trusted non-3 GPP access network.This binding instruction unique distinguished information that each Access Network connects by carrying and is identified the Access Network that PCRF determines and connect, and such as, this binding instruction can carry IP-CANType and/or RATType of this trusted non-3 GPP access network.If trusted non-3 GPP access network is WiMAX, then IP-CANType is WiMAX.It can also be the IP address of S-GW or BBERF.It can also be the session identification of the Diameter session of setting up between S-GW and PCRF.Certainly other information uniquely distinguishing the connection of each Access Network are applicable equally.When realizing, this binding indicates, and directly can be defined in PCCRules and (namely directly expand existing PCCRules), also can be defined in outside PCCRules.
In other embodiments, if UE is simultaneously by the multiple access of E-UTRAN and trustless non-3 GPP access, method and flow process similar.
In other embodiments, if the business that UE please look for novelty, to providing send a request message AF2, AF2 and PCRF of the AF2 of business information to set up AF session, corresponding data flow is SDF2.PCRF is according to traffic performance, the characteristic that the CAMEL-Subscription-Information of network strategy, user and Access Network connect formulates PCCRules2 and QoSRules2, and determining that SDF2 is transmitted by the connection of trusted non-3 GPP access network, the flow process of its distributing policy and binding instruction is similar.
Embodiment two
What embodiment two described is that UE such as the flow process of embodiment one is adhered to.After access service, need the flow process changing business data flow transfer path for a certain reason, this reason may be UE active request or Access Network request.Fig. 5 is the flow chart of the flow process in the change data stream path that the present embodiment describes.As shown in Figure 5, its concrete steps are:
Step 501, in S-GW, BBERF receives internal trigger message or external trigger message, asks SDF1 to be moved to other accesses, further, can also carry the instruction of the reason of migration and the target access network connection of UE selection transmission SDF1 in described message;
Step 502, BBERF is to PCRF transmission gateway control and QoS rule request message, and the request of carrying in message is by the instruction of SDF1 migration, and further, described message can also carry the instruction of the reason of migration and the target access network connection of UE selection transmission SDF1;
Step 503, after PCRF receives message, the traffic performances such as the instruction that the attribute connected according to each Access Network, network strategy, UE select the target access network of transmission SDF1 to connect and migration reason determine SDF1 to be moved to the access of trusted non-3 GPP access network; Acknowledge message is returned, the QoSRules1 installed before indicating BBERF deletion in message to BBERF; After BBERF in S-GW receives message, delete QoSRules1;
Step 504, PCRF is according to the PCCRules1 ' reformulating SDF1 of the CAMEL-Subscription-Information of user, network strategy, switch-in attribute and business information and QoSRules1 '.PCRF provides message QoSRules1 ' to be sent to the BBERF in the trusted non-3 GPP access network Central Shanxi Plain by gateway control and QoS rule;
Step 505, BBERF returns acknowledge message after installing QoSRules1 ';
Step 506, PCRF provides message PCCRules1 ' to be sent to the PCCRules1 of PCEF for issuing before upgrading by policy charging rule.Carry binding instruction in described message, described binding instruction shows, when PCEF detects the business data flow of application PCCRules1 ', these business data flows will send to the connection by trusted non-3 GPP access network.This binding instruction unique distinguished information that each Access Network connects by carrying and is identified the Access Network that PCRF determines and connect, such as, IP-CANType and/or wireless access type RATType is carried in this binding instruction, if trusted non-3 GPP access is WiMAX, so value is WiMAX, if CDMA2000, and access style is HRPD, then IP-CANType value is 3GPP2, RATType is HRPD; Binding instruction can also be the IP address of trusted non-3 GPP access gateway or BBERF.It can also be the session identification of the Diameter session of setting up between trusted non-3 GPP access network Central Shanxi Plain BBERF and PCRF.Certainly other information uniquely distinguishing the connection of each Access Network are applicable equally.When realizing, this binding indicates, and directly can be defined in PCCRules ' and (namely directly expand existing PCCRules), also can be defined in outside PCCRules ';
Step 507, PCEF returns acknowledge message.
Embodiment three
What embodiment three described is that UE such as the flow process of embodiment one is adhered to.Fig. 6 be the present embodiment describe determine to disconnect UE by the connection of E-UTRAN Access Network due to P-GW, and determine SDF business data flow to move in connection that UE set up by trusted non-3 GPP access network, thus cause the flow chart changing data stream path.As shown in Figure 6, its concrete steps are:
Step 601, in P-GW, PCEF receives internal trigger or external trigger, asks SDF1 to move to other Access Networks;
Step 602, PCEF is to PCRF sending strategy charging regulation request message, and the instruction that SDF1 moves by the request of carrying in message, further, also can carry the reason of migration in this message;
Step 603, after PCRF receives message, the traffic performances such as the instruction that the attribute connected according to each Access Network, network strategy, UE select the target access network of transmission SDF1 to connect and migration reason determine SDF1 to be moved to the access of trusted non-3 GPP access network.PCRF is according to the switch-in attribute etc. of network strategy, user signing contract information and non-3 GPP access network, reformulate PCCRules1 ' and corresponding QoSRules1 ', and send to PCEF by policy charging rule acknowledge message, carry binding instruction ' in message simultaneously, this binding indicates ' show, when PCEF detects the business data flow of application PCCRules1 ', these business data flows will send to the connection accessed by trusted non-3 GPP access network.This binding instruction unique distinguished information that each Access Network connects by carrying and is identified the Access Network that PCRF determines and connect, and such as, this binding indicates ' realize being IP-CANType and/or RATType that can carry this trusted non-3 GPP access network.If trusted non-3 GPP access network is WiMAX, then IP-CANType is WiMAX.It can also be the IP address of trusted non-3 GPP access gateway or BBERF.It can also be the session identification of the Diameter session of setting up between BBERF and the PCRF in the trusted non-3 GPP access network Central Shanxi Plain.Certainly other information uniquely distinguishing the connection of each Access Network are applicable equally.When realizing, this binding indicates ', directly can be defined in PCCRules ' and (namely existing PCCRules directly be expanded), also can be defined in outside PCCRules '.After PCEF receives message, with the PCCRules1 before PCCRules1 ' renewal and according to instruction renewal binding relationship;
Step 604, PCRF sends gateway control to the BBERF in S-GW and QoS rule provides acknowledge message, indicates BBERF to delete QoSRules1 in message;
Step 605, BBERF returns acknowledge message to PCRF;
Step 606, PCRF provides message QoSRules1 ' to be sent to the BBERF in the trusted non-3 GPP access network Central Shanxi Plain by gateway control and QoS rule;
Step 607, BBERF installs QoSRules1 ', and returns acknowledge message to PCRF.
Embodiment four
What embodiment four described is that UE such as the flow process of embodiment one is adhered to.Fig. 7 be the present embodiment describe there occurs the reason that change or the CAMEL-Subscription-Information of user there occurs change (as user accesses the signing deleted of trusted non-3 GPP access) due to network strategy, cause the flow chart of change business data flow transfer path.As shown in Figure 7, its concrete steps are:
Step 701, PCRF receives internal trigger or external trigger, and the traffic performances such as the instruction that the attribute connected according to each Access Network, network strategy, UE select the target access network of transmission SDF1 to connect and migration reason determine SDF1 business datum to flow through trusted non-3 GPP access network and connect and transmit; PCRF reformulates PCCRules1 ', QoSRules1 ' according to the connection attribute of the CAMEL-Subscription-Information of user, network strategy, business information and trusted non-3 GPP access network;
Step 702, PCRF sends gateway control to the BBERF in S-GW and QoS rule provides message, the QoSRules1 installed before request BBERF deletes;
Step 703, BBERF deletes QoSRules1, returns acknowledge message to PCRF;
Step 704, because PCRF determines that this business is transmitted by the connection of E-UTRAN trusted non-3 GPP access network, so BBERF from PCRF to the trusted non-3 GPP access network Central Shanxi Plain by gateway control and QoS rule provide message send QoSRules1 ';
Step 705, BBERF installs QoSRules1 ', and trusted non-3 GPP access network performs corresponding strategy.BBERF returns acknowledge message;
Step 706, PCRF provides message to send the PCCRules1 issued before PCCRules1 ' upgrades to the PCEF in P-GW by policy charging rule, and carry binding instruction in message ', it indicates that, when PCEF detects the business data flow of application PCCRules1 ', these business data flows will send to the connection by trusted non-3 GPP access network.This binding instruction unique distinguished information that each Access Network connects by carrying and is identified the Access Network that PCRF determines and connect, such as, this binding indicates ' IP-CAN type and/or wireless access type RATType can be carried, if trusted non-3 GPP access network is WiMAX, then IP-CANType is WiMAX.It can also be the IP address of trusted non-3 GPP access gateway or BBERF.It can also be the session identification of the Diameter session of setting up between BBERF and the PCRF in the trusted non-3 GPP access network Central Shanxi Plain.Certainly other information uniquely distinguishing the connection of each Access Network are applicable equally.When realizing, this binding indicates ', directly can be defined in PCCRules ' and (namely existing PCCRules directly be expanded), also can be defined in outside PCCRules ';
Step 707, after PCEF receives message, with the PCCRules1 before PCCRules1 ' renewal and according to instruction renewal binding relationship, and returns acknowledge message.
UE is set up simultaneously to the scene of IP-CAN session by E-UTRAN and trustless non-3 GPP access network multiple access, the method that data flow and Access Network connect and bind by PCRF is similar to the above embodiments.
UE is set up simultaneously to the scene of IP-CAN session by E-UTRAN (wherein adopting GTP agreement between S-GW and P-GW) and non-3 GPP access network multiple access, the method that PCRF data flow is bound with access is similar to the above embodiments.Difference is that PCRF does not need the BBERF sent to by corresponding QoSRules in S-GW.
For UE simultaneously by the scene of E-UTRAN and non-3 GPP access network multiple access, and adopt DSMIPv6 agreement when UE is accessed by non-3 GPP access network.The method that the IP traffic of business and access are bound by PCRF is similar to the above embodiments.Difference is when PCRF determines the IP traffic of business and non-3 GPP access to bind, the binding being handed down to PCEF indicate can also time the UE Care-of Address CoA that obtains when non-3 GPP access.And PCRF determines when the IP traffic of business and E-UTRAN being bound, PCRF does not need to issue binding and is indicated to PCEF.
For above all embodiments, can also specify, when PCRF determines the IP traffic of business and E-UTRAN to bind, not issue binding and be indicated to PCEF.When PCRF determines the IP traffic of business and non-3 GPP access to bind, PCRF issues binding and is indicated to PCEF.The specific implementation of binding instruction as described above in Example.
Embodiment five
This embodiment problem to be solved is not carrying out P-GW/PCRF, under the prerequisite that significantly function strengthens, realizing business data flow and transmitting in correct Access Network.This embodiment comprises following two parts:
Part I: similar with the flow process of Fig. 3, UE sets up the IP-CAN session of multiple access, and difference is: in " confirmation of IP-CAN session modification " message of step 320 except carrying PCC rule and event trigger, also carries binding instruction.When PCRF to determine that according to configuration information or network strategy all needs of this IP-CAN session of this UE initiate the business of resource reservation by network, its business data flow all pass through E-URTAN Access Network and connects and transmits.This binding instruction is by carrying IP-CAN type and/or wireless access type RATType, and value is that 3GPP-EPS and E-UTRAN represents respectively.This binding instruction can also by carrying the IP address of S-GW/BBERF, and PCEF preserves this binding instruction.Certainly other information uniquely distinguishing the connection of each Access Network are applicable equally.In addition, binding instruction can also send to PCEF by " confirmation of IP-CAN session establishment " message of step 308, and PCEF preserves.If because configuration information or network strategy change, PCRF can re-issue binding instruction, the business of resource reservation initiated by all needs of this IP-CAN session of this UE of notice PCEF by network, its business data flow all passes through trusted non-3 GPP access network and connects transmission, and the related procedure of prior art can be adopted to realize.
Part II: UE initiating business request, initiates resource reservation by network, its flow process and Fig. 4 similar.Difference is: in 405 steps, PCRF does not carry out decision-making according to the attribute of business to the Access Network of business datum flow transmission, because in a first portion, PCRF has determined according to configuration information or network strategy that the Access Network that the business data flow that all needs of this IP-CAN session of this UE initiate resource reservation by network transmits connects.In 408 steps, PCRF does not need to issue binding instruction yet, and in 409 steps, the PCC issued in 408 steps rule to be connected with E-URTAN Access Network according to the binding instruction obtained in a first portion and to bind by PCEF, is sent to the connection of E-URTAN Access Network by business data flow
It should be noted that, in other embodiments, if PCRF determines that this business will be transmitted by trusted non-3 GPP access, then in the step 308 of Fig. 3 or the message of step 320, IP-CANType and/or RATType that this trusted non-3 GPP access network connects when binding instruction realizes, can be carried.If trusted non-3 GPP access network is WiMAX, then IP-CANType is WiMAX, can also carry the IP address of trusted non-3 GPP access gateway/BBERF when binding instruction realizes.PCEF, according to binding instruction, knows that the resource reservation that network is initiated will carry out in the connection by trusted non-3 GPP access network, that is, all business datums of this IP-CAN session of this UE flow through the connection transmission of trusted non-3 GPP access.
In other embodiments, if UE is simultaneously by the multiple access of E-UTRAN and trustless non-3 GPP access, then the process of processing method now and flow process and foregoing description is similar, difference is: when PCRF determines that business datum flows through trustless non-3 GPP access network and connects, this binding instruction can also carry the IP address of ePDG/BBERF.
Can find out, above-described embodiment five and embodiment one to four difference are: in embodiment five, and PCRF determines that the data flow that all needs of this IP-CAN session of UE initiate resource reservation business by network all passes through an Access Network transmission, and notifies PCEF.In embodiment one to four, PCRF carries out decision-making for each business, determines the Access Network of business datum flow transmission, then notifies PCEF.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the method that connects and binds of data flow and Access Network, be applied to the grouping system of evolution, the method is applied to user equipment (UE) simultaneously by the scene that multiple Access Network accesses, and comprising:
Policy charging rule functional entity PCRF determines that the Access Network of business datum flow transmission connects, and is connected by the described Access Network determined and inform to strategy and charging execution function entity PCEF, described PCEF and be connected with Access Network by described business data flow and bind;
Wherein, the described Access Network connection determined is informed to described PCEF and by described PCEF, described business data flow is connected the concrete grammar carrying out binding with Access Network and comprises by described PCRF:
Described PCRF sends message to described PCEF, carries strategy and charging control PCC rule and binding and indicate in described message; Described PCEF installs described PCC rule, and is bound regular for PCC to be connected with target access network according to described binding instruction; Or,
Described PCRF sends message to described PCEF, carries binding instruction in described message; Described PCEF preserves this binding instruction, and is tied to target access network to the PCC rule that the IP of subscriber equipment connects the relevant business data flow of Access Network session according to described binding instruction connects what issue after described PCRF.
2. the method for claim 1, is characterized in that,
After PCC rule to be connected with target access network to bind according to binding instruction by described PCEF, described method comprises further:
When described PCEF detects the data flow applying described PCC rule, data flow is connected to the target access network bound with described PCC rule by described PCEF.
3. method as claimed in claim 1, is characterized in that,
Before described PCRF sends message to described PCEF, described method also comprises: described PCRF determines to transmit according to collocation strategy the target access network that data flow uses and connects, and formulate corresponding PCC rule and service quality QoS regular.
4. method as claimed in claim 3, is characterized in that,
After described PCRF formulates PCC rule and QoS rule, described method also comprises: the bearing binding during described QoS rule sends to target access network to connect by message by described PCRF and event reporting function entity B BERF; Described BBERF installs described QoS rule, and returns acknowledge message.
5. method as claimed in claim 4, is characterized in that,
During the binding that described PCRF update data stream is connected with Access Network, PCRF formulates new PCC rule and QoS rule, message is sent to PCEF, carry new PCC rule in described message and described PCC rule is connected the binding of carrying out binding with target access network indicates, delete the QoS rule of BBERF in the target access network connection of source, in connecting to fresh target Access Network, BBERF issues new QoS rule simultaneously.
6. the method according to any one of claim 1 to 5, is characterized in that,
Binding instruction is sent to described PCEF by described PCRF, wherein, carries unique information distinguished described Access Network and connect in described binding instruction.Described Access Network connects and carrys out unique identification by one of following information: procotol connects access network type and/or radio access technology types, be used to indicate internet protocol address that described Access Network connects, be used to indicate the Diameter session identification that described Access Network connects, described UE accesses the Care-of Address CoA obtained when target access network connects.
7. method as claimed in claim 6, is characterized in that,
Described binding instruction is directly defined in described PCC rule, or to be defined in outside described PCC rule and to issue in same message with described PCC rule.
8. method as claimed in claim 3, is characterized in that,
The factor that described PCRF considers when determining that the target access network that transmission data flow uses connects according to collocation strategy comprises: the attribute that the CAMEL-Subscription-Information of user, network strategy, business information, each Access Network connect and described UE select the instruction of target access network connection, the reason of migration that transmit data flow.
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| CN103392363B (en) * | 2010-12-31 | 2016-12-28 | 华为技术有限公司 | A kind of IP stream moving method and PCRF, ANDSF |
| CN103002543B (en) * | 2011-09-14 | 2016-12-21 | 中兴通讯股份有限公司 | A kind of multi-access method and system |
| CN103024823A (en) * | 2011-09-20 | 2013-04-03 | 中兴通讯股份有限公司 | Implementing method of flow migration, terminal and grouped data network gateway |
| WO2019213905A1 (en) * | 2018-05-10 | 2019-11-14 | Oppo广东移动通信有限公司 | Method and apparatus for binding data stream, and computer storage medium |
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