CN105451253A - Strategy control method and apparatus, DRA, and P-CSCF - Google Patents
Strategy control method and apparatus, DRA, and P-CSCF Download PDFInfo
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- CN105451253A CN105451253A CN201410433438.9A CN201410433438A CN105451253A CN 105451253 A CN105451253 A CN 105451253A CN 201410433438 A CN201410433438 A CN 201410433438A CN 105451253 A CN105451253 A CN 105451253A
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Abstract
The invention discloses a strategy control method and apparatus, a Diameter Routing Agent (DRA), and a Proxy Call Session Control Function (P-CSCF). The method comprises the steps in which, the DRA forwards a response message carrying an error cause value and being returned by a spare PCRF to the P-CSCF when UE makes a VoLT call and the P-CSCF requests specially uploaded resources from an abnormal master PCRF; and the P-CSCF transmits a fault indication message to an S-CSCF based on the error cause value, so that the S-CSCF can trigger an HSS to re-establish IMS PDN connection for the UE.
Description
Technical field
The present invention relates to the communication technology, particularly relate to a kind of policy control method and device, Diameter route agent (DRA, DiameterRoutingAgent), Proxy Call Session Control Function (P-CSCF, ProxyCallSessionControlFunction).
Background technology
Third generation partner program (3GPP, 3rdGenerationPartnershipProject) at evolved packet system (EPS, EvolvedPacketSystem) policy control and charging (PCC, PolicyControlandCharging) framework is introduced in network.PCC framework carries out the management of bearing resource to end-to-end equipment such as terminal, wireless, core net, and can associate with charging policy, utilize based on gate and service quality (QoS, QualityofService) policy control controlled and the charging controlling functions based on stream, achieve the differentiation of data service, become more meticulous management and control, for operator provides more perfect management and control means, make the marketing, migration efficiency obtains sufficient network techniques support.
At present, the classical group net mode of PCC system can be divided into two kinds: there is not Diameter route agent (DRA in the first PCC system, DiameterRoutingAgent, wherein Diameter is the meaning of diameter, Diameter is the title of agreement, be commonly referred to as Diameter), namely without DRA networking (see Fig. 1); DRA is there is, i.e. DRA networking (see Fig. 2) in the second PCC system.Network element in DRA networking generally comprises: general packet radio service (GPRS, GeneralPacketRadioService) gateway supports node (GGSN, GatewayGPRSSupportNode), DRA, GPRS (GPRS, GeneralPacketRadioService) serving GPRS support node (SGSN, ServingGPRSSupportNode) and PCRF.
Fig. 1 is the composition structural representation of the first PCC network architecture, as shown in Figure 1, PCC framework comprises subscriber equipment (UE, UserEquipment) 11, base station 12, mobile management entity (MME, MobilityManagementEntity)/SGSN13, strategy and charging performance element 14 (PCEF, PolicyandChargingEnforcementFunction), strategy and charging regulation unit 15 (PCRF, PolicyandChargingRuleFunction).Wherein:
Base station 12 comprises the second generation (2G), the third generation (3G), Long Term Evolution (LTE, Long Term Evolution (the LTE-A of LongTermEvolution)/enhancing, the base stations such as the evolved base station (eNB, EvolutionNodeB) LTE-Advanced) in standard;
PCEF14 and PCRF15 is the key network element realizing PCC function.Wherein, PCEF14 is connected with business side equipment 16, and PCEF14 has the detection of business data flow, strategy execution and the function such as charging based on stream.In addition, PCEF14 is deployed in gateway device usually as System Architecture Evolution gateway (SAEGW, or general packet radio service (GPRS SystemArchitectureEvolutionGateWay), GeneralPacketRadioService) gateway supports node (GGSN, GatewayGPRSSupportNode), in, in the following drawings of the present embodiment, PCEF14 will be represented with SAEGW/SGSN.
PCRF15 is connected with business support system 17, PCRF15 is for realizing the function comprising policy control decision and control based on flow based charging, there is provided about business data flow detection, gate to PCEF14, based on QoS and the network control function based on flow based charging (except diameter credit control), can with multiple dimension such as business, user, position, accumulative use amount, access style, time for trigger condition, generating tube regulatory control is then handed down to PCEF and performs.In addition, PCRF15 usually and user-subscribed database (SPR, SubscriptionProfileRepository) be deployed in together.
Fig. 2 is the composition structural representation of the second PCC network architecture, as shown in Figure 2, in DRA networking, network element is except comprising UE11, base station 12, SGSN/MME13, PCEF14, PCRF15, also comprise DRA18 and Proxy Call Session Control Function (P-CSCF, ProxyCallSessionControlFunction) 19, wherein the quantity of PCRF15 decides according to the networks trategy of reality.DRA networking shown in Fig. 2 is substantially identical with the workflow without DRA networking shown in Fig. 1, and just between PCEF14 and PCRF15 or between P-CSCF19 and PCRF15, increase DRA, DRA plays forwarding capability.It should be noted that, P-CSCF is eliminated in order to the simple and clear of view in the PCC framework shown in Fig. 1, CSCF (CSCF, ProxyCallSessionControlFunction) proxy CSCF (P-CSCF can be divided into according to function, ProxyCSCF), inquiry CSCF (I-CSCF, InterrogatingCSCF), serving CSCF (S-CSCF, ServingCSCF), urgent CSCF (E-CSCF, EmergencyCSCF), they are all session initiation protocol (SIP in essence, SessionInitiationProtocol) server, treatment S IP signaling.
Network direct transfers (VoLTE, VoiceoverLTE) be a kind of IP data transmission technology, without the need to second generation communication network or third generation communication network (2G/3G) net, whole service bearer, on forth generation communication (4G) network, can realize data and the unification of speech business under consolidated network.VoLTE is a kind of speech business based on IP Multimedia System (IMS, IPMultimediaSubsystem).IMS is owing to supporting multiple access and abundant multimedia service, become the agreement (IP interconnected between network, InternetProtocol) the core net standard architecture in epoch, such as, IMS is by by 3GPP, global system for mobile communications association (GSMA, GlobalSystemforMobileCommunicationsAssembly) standard architecture being defined as mobile voice has become fixing speech field wideband telephony (VoBB, VoiceoverBroadBand), PSTN (PSTN, PublicSwitchedTelephoneNetwork) main flow that net changes is selected.
As previously mentioned, PCEF and PCRF is the key network element realizing PCC function, and P-CSCF will be caused cannot to ask special feature resource when PCRF breaks down, caller and called subscriber all cannot use VoLTE business; Because existing network is without PCRF disaster tolerance, so only after PCRF fault recovery, and if only if, and user could recover VoLTE business after IMSPDN adheres to again.Such as, PCC network shown in Fig. 1 is without PCRF disaster tolerance, the flow process of PCC network shown in Fig. 1 when breaking down particularly can see Fig. 3, user carry out VoLTE caller or called time, trigger P-CSCF and ask dedicated bearing resource to ensure VoLTE business (step S31) for it.At this moment, if the link occurs fault between PCRF and DRA, P-CSCF will be caused cannot to ask special feature resource, caller or called subscriber all cannot use VoLTE business (step S32); After PCRF fault recovery, and if only if, and user adheres to again at IMS public data network (PDN, PublicDataNetwork), and be that user rebuilds Gx session by PCEF, the VoLTE business of user could be recovered (step S33).
For another example, define PCRF fault detection mechanism in relevant technologies, but still do not have PCRF disaster tolerance, the requirement of the fault detection mechanism in R10 to PCC framework needs to comprise two PCRF primary, for subsequent use, i.e. primary PCRF20 and PCRF21 for subsequent use.Fig. 4 is the structural representation of the third the PCC network architecture, and the PCRF fault detection mechanism under the PCC framework shown in Fig. 4 is:
The primary PCRF state of PCEF14 perception when carrying out Gx session updates, if find, primary PCRF breaks down, then make this user's reactivation for its gravity treatment PCRF; Specifically, when gateway (SGW occurs user, ServingGateway) trigger PCEF14 during the event such as switching and initiate diameter credit control update request (CCR-U, CreditControlRequest-Update) time, because DRA18 perceives the link failure between DRA18 and primary PCRF20, therefore failure message will be sent to PCR21 for subsequent use; And PCRF21 for subsequent use does not preserve this user-dependent session information, therefore replying diameter credit control renewal response (CCA-U by DRA18 to PCEF14, CreditControlAnswer-Update) cause value of DIAMETER unknown session id (DIAMETER_UNKNOWN_SESSION_ID) is carried time, after PCEF14 receives this cause value, trigger UE11 and carry out reactivation.But the undefined Rx interface failure handling mechanisms of 3GPP standard, when P-CSCF19 asks special feature resource by DRA18 to PCRF21 for subsequent use, because PCRF21 for subsequent use leads to the failure without this session information.Therefore by present normal conditions, only have when user is at IP Multimedia System (IMS, IPMultimediaSubsystem, wherein IP is Internet protocol) PDN again adheres to or gateway (SGW occurs, SeveringGateWay), when level switches, VoLTE business could be recovered.
The above is visible, and existing network is without PCRF disaster tolerance, if PCRF breaks down, P-CSCF will be caused cannot to ask to set up special feature resource, therefore, calling and called are with using VoLTE business per family; And if only if, and user could recover VoLTE business after IMSPDN adheres to again, and the feature of LTE is permanent online, and the cycle that user adheres to again is very long, this means after PCRF fault, and user will cannot use VoLTE business for a long time.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of policy control method and device, DRA, P-CSCF for solving problems of the prior art, can carry out IMSPDN rapidly and again adheres to and then promptly recover VoLTE business.
The technical scheme of the embodiment of the present invention is achieved in that
First aspect, the embodiment of the present invention provides a kind of policy control method, and described method comprises:
UE to carry out in the process of VoLTE calling and P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, DRA forwards to described P-CSCF the response message carrying error reason value that PCRF for subsequent use returns;
Described P-CSCF is according to described error reason value, send failure indication information to S-CSCF, the public data network (IMSPDN) that described failure indication information is used for making described S-CSCF triggering home subscriber server (HSS) re-establish internet protocol multimedia subsystem for described UE connects.
Preferably, described method also comprises:
After described S-CSCF receives described failure indication information, send the reset Indication message being used to indicate described P-CSCF and resetting to described HSS;
After described HSS receives described reset Indication message, send reset Indication message to MME;
After described MME receives described reset Indication message, indicate described UE again to initiate the attachment flow of described IMSPDN, connect to rebuild IMSPDN.
Preferably, described P-CSCF receive that DRA forwards carry the response message of error reason value before, described method also comprises:
Described P-CSCF sends to DRA and is used for occurring that abnormal primary PCRF asks the request message of special feature resource to described;
Described request message is transmitted to described PCRF for subsequent use by described DRA;
Described DRA receives the response message carrying error reason value that described PCRF for subsequent use sends.
Preferably, described failure indication information adopts the sip message of expansion to realize.
Preferably, described error reason value comprises Internet protocol and connects access to network conversation unavailable (IP-CAN_SESSION_NOT_AVAILABLE) or the unknown session identification (DIAMETER_UNKNOWN_SESSION_ID) of diameter DIAMETER.
Second aspect, the embodiment of the present invention provides a kind of policy control method, and described method comprises:
UE to carry out in the process of VoLTE calling and P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, described P-CSCF receives the response message carrying error reason value that DRA forwards;
Described P-CSCF, according to described error reason value, sends failure indication information to S-CSCF, and it is that described UE re-establishes IMSPDN connection that described failure indication information is used for making described S-CSCF trigger HSS.
Preferably, described failure indication information adopts the session initiation protocol sip message of expansion to realize.
Preferably, described error reason value comprises IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID.
The third aspect, the embodiment of the present invention provides a kind of policy control method, and described method comprises:
UE to carry out in the process of VoLTE calling and P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, described DRA receives the response message carrying error reason value that described PCRF for subsequent use sends;
Described response message is transmitted to P-CSCF by described DRA, and described response message is used for that described P-CSCF is notified, and S-CSCF triggering HSS is that described UE re-establishes IMSPDN connection.
Preferably, described method also comprises:
Described DRA receives the request message of asking special feature resource for the primary PCRF abnormal to described appearance that described P-CSCF sends;
Described request message is transmitted to described PCRF for subsequent use by described DRA.
Preferably, described error reason value comprises IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID.
Fourth aspect, the embodiment of the present invention provides a kind of policy control device, and described device comprises P-CSCF and DRA, wherein:
Described DRA, for carry out at UE in the process of VoLTE calling and P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, forward to described P-CSCF the response message carrying error reason value that PCRF for subsequent use returns;
Described P-CSCF, for sending failure indication information according to described error reason value to S-CSCF, it is that described UE re-establishes IMSPDN connection that described failure indication information is used for making described S-CSCF trigger HSS.
Preferably, described device also comprises S-CSCF, HSS and MME, wherein:
Described S-CSCF, after receiving described failure indication information, sends the reset Indication message being used to indicate P-CSCF and resetting to described HSS;
Described HSS, after receiving described reset Indication message, sends reset Indication message to MME;
Described MME, after receiving described reset Indication message, instruction UE initiates the attachment flow of IMSPDN network again, connects to rebuild IMSPDN.
Preferably, described P-CSCF, is also used for occurring that abnormal primary PCRF asks the request message of special feature resource to described for sending to DRA;
Described DRA, also for described request message is transmitted to described PCRF for subsequent use;
Described DRA, also for receiving the response message carrying error reason value that described PCRF for subsequent use sends.
Preferably, described failure indication information adopts the session initiation protocol sip message of expansion to realize.
Preferably, described error reason value comprises IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID.
5th aspect, the embodiment of the present invention provides a kind of P-CSCF, and described P-CSCF comprises the first receiving element and the first transmitting element, wherein:
Described first receiving element, for carry out at UE in the process of VoLTE calling and described P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, receive the response message carrying error reason value that DRA forwards;
Described transmitting element, for according to described error reason value, send failure indication information to service call conversation control function S-CSCF, it is that described UE re-establishes internet protocol multimedia subsystem IMSPDN and connects that described failure indication information is used for making described S-CSCF to trigger home subscriber server HSS.
Preferably, described failure indication information adopts the session initiation protocol sip message of expansion to realize.
Preferably, described error reason value comprises IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID.
6th aspect, the embodiment of the present invention provides a kind of DRA, and described DRA comprises the second receiving element and retransmission unit, wherein:
Described second receiving element, for carry out at UE in the process of VoLTE calling and P-CSCF to described occur that abnormal primary PCRF asks special feature resource time, receive the response message carrying error reason value that described PCRF for subsequent use sends;
Described retransmission unit, acts on behalf of P-CSCF for being transmitted to by described response message, and described response message is used for that described P-CSCF is notified, and S-CSCF triggering HSS is that described UE re-establishes IMSPDN connection.
Preferably, described second receiving element, also for receiving the request message of asking special feature resource for the primary PCRF abnormal to described appearance that described P-CSCF sends;
Accordingly, described retransmission unit, also for described request message is transmitted to described PCRF for subsequent use.
Preferably, described error reason value comprises IP-CAN_SESSION_NOT_AVAILABLE or straight DIAMETER_UNKNOWN_SESSION_ID.
The policy control method that the embodiment of the present invention provides and device, DRA, P-CSCF, wherein: UE to carry out in the process of VoLTE calling and P-CSCF to described occur that abnormal primary PCRF asks special feature resource time, DRA forwards to described P-CSCF the response message carrying error reason value that PCRF for subsequent use returns; Described P-CSCF, according to described error reason value, sends failure indication information to S-CSCF, and triggering HSS to make described S-CSCF is that described UE re-establishes IMSPDN even; So, IMSPDN can be carried out rapidly again adhere to and then promptly recover VoLTE business.
Accompanying drawing explanation
Fig. 1 is the composition structural representation of the first PCC network architecture;
Fig. 2 is the composition structural representation of the second PCC network architecture;
Fig. 3 is the schematic flow sheet of the PCC network architecture when breaking down shown in Fig. 1;
Fig. 4 is that the third is applicable to the structural representation of the PCC network architecture of R10;
Fig. 5 is the structural representation of the hot standby in real time PCC network architecture of a kind of 1+1;
Fig. 6-1 is the realization flow schematic diagram one of the embodiment of the present invention one policy control method;
Fig. 6-2 is the realization flow schematic diagram two of the embodiment of the present invention one policy control method;
Fig. 6-3 is the realization flow schematic diagram three of the embodiment of the present invention one policy control method;
Fig. 7-1 is the PCC network architecture schematic diagram of the embodiment of the present invention two;
Fig. 7-2 is the realization flow schematic diagram of the embodiment of the present invention two policy control method;
Fig. 8-1 is the realization flow schematic diagram one of the embodiment of the present invention three policy control method;
Fig. 8-2 is the realization flow schematic diagram two of the embodiment of the present invention three policy control method;
Fig. 9-1 is the composition structural representation of the embodiment of the present invention four policy control device;
Fig. 9-2 is the composition structural representation of the embodiment of the present invention four P-CSCF;
Fig. 9-3 is the composition structural representation of the embodiment of the present invention four DRA.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the present invention is further elaborated.
In various embodiments of the present invention, UE to carry out in the process of VoLTE calling and P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, DRA forwards to described P-CSCF the response message carrying error reason value that PCRF for subsequent use returns; Described P-CSCF, according to described error reason value, sends failure indication information to S-CSCF, and it is that described UE re-establishes IMSPDN connection that described failure indication information is used for making described S-CSCF trigger HSS.
Embodiment one
The embodiment of the present invention provides a kind of policy control method, and Fig. 6-1 is the realization flow schematic diagram one of the embodiment of the present invention one policy control method, and as in Figure 6-1, described method comprises:
Step 601, DRA judges whether the link between described DRA and N number of primary PCRF occurs exception respectively;
Here, described N be greater than 1 integer;
Step 602, when described DRA determines that exception appears in DRA described in any one and the link between primary PCRF, by the link switching between described DRA and the primary PCRF occurring exception to PCRF for subsequent use;
Step 603, UE to carry out in the process of VoLTE calling and P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, DRA forwards to described P-CSCF the response message carrying error reason value that PCRF for subsequent use returns;
Step 604, described P-CSCF, according to described error reason value, sends failure indication information to S-CSCF.
Here, described failure indication information is used for making described S-CSCF trigger HSS is that described UE re-establishes IMSPDN connection.
Here, described error reason value comprises Internet protocol and connects access to network conversation unavailable (IP-CAN_SESSION_NOT_AVAILABLE) or the unknown session identification (DIAMETER_UNKNOWN_SESSION_ID) of DIAMETER, wherein, IP-CAN is the abbreviation of IP-ConnectivityAccessNetwork, is meant to Internet protocol and connects access network.
In the embodiment of the present invention, as in fig. 6-2, after step 604, described method also comprises:
Step 605, after described S-CSCF receives described failure indication information, sends the reset Indication message being used to indicate described P-CSCF and resetting to described HSS;
Here, reset Indication message, also referred to as recovery Indication message, is be used to indicate subscriber equipment (UE, UserExperiment) to rebuild IMSPDN connection.
Here, described failure indication information adopts the sip message of expansion to realize.
Step 606, after described HSS receives described reset Indication message, sends reset Indication message to MME;
Step 607, after described MME receives described reset Indication message, indicates described UE again to initiate the attachment flow of described IMSPDN, connects to rebuild IMSPDN.
In the embodiment of the present invention, as shown in Fig. 6-3, described P-CSCF receive that DRA forwards carry the response message of error reason value before, after step 602, described method also comprises:
Step S61, described P-CSCF send to described DRA and are used for occurring that abnormal primary PCRF asks the request message of special feature resource to described;
Described request message is transmitted to described PCRF for subsequent use by step S62, described DRA;
Step S63, described DRA receive the response message carrying error reason value that described PCRF for subsequent use sends.
Embodiments provide the policy control method of the non real-time backup of a kind of N+1, the method is used for PCRF disaster tolerance, and particularly, DRA judges whether the link between described DRA and N number of primary PCRF occurs exception respectively; When described DRA determines that exception appears in DRA described in any one and the link between primary PCRF, by the link switching between described DRA and the primary PCRF occurring exception to PCRF for subsequent use; UE to carry out in the process of VoLTE calling and P-CSCF to described occur that abnormal primary PCRF asks special feature resource time, DRA forwards the response message carrying error reason value to described P-CSCF; Described P-CSCF, according to described error reason value, sends failure indication information to S-CSCF, and triggering HSS to make described S-CSCF is that described UE re-establishes IMSPDN even; Like this, the technical scheme that the embodiment of the present invention provides, has the following advantages:
1) in the technical scheme that the embodiment of the present invention provides, IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID is carried to judge that primary PCRF breaks down in the response message utilizing PCRF for subsequent use to return by P-CSCF, by the sip message between expansion P-CSCF and S-CSCF, primary PCRF fault message is informed S-CSCF, triggering HSS by S-CSCF makes user re-establish IMSPDN connection, thus solve the problem cannot carrying out VoLTE calling after PCRF in existing network breaks down, compare the real-time Disaster Tolerant Scheme of 1+1 simultaneously, save the expense of equipment cost and backup link.
2) technical scheme that the embodiment of the present invention provides carries out VoLTE disaster-tolerant recovery based on user's request, and trigger when calling and called carry out VoLTE calling and recover flow process, real-time is high, and Consumer's Experience impact is less.
The technical scheme that the embodiment of the present invention provides, the problem of VoLTE business will cannot be carried out after PCRF fault under solution existing network, simultaneously in order to reduce costs, the embodiment of the present invention is applicable to the PCC network architecture of the non real-time backup of N+1, " N " wherein in the non real-time backup of N+1 represents that " 1 " in the non real-time backup of N number of primary PCRF, N+1 represents 1 PCRF for subsequent use.
The embodiment of the present invention is also applicable to the PCC network architecture of the non real-time backup of 1+1 in addition, the hot standby in real time PCRF Disaster Tolerant Scheme of existing 1+1 is see Fig. 5, and detailed process is: primary PCRF20 and PCRF21 for subsequent use is by the real-time simultaneous user's session information (step S51) of backup link; After DRA18 detects that primary PCRF20 breaks down, by link switching to PCRF21 for subsequent use, thus by PCRF21 adapter user conversation (step S52) for subsequent use; PCEF21 for subsequent use can use former PCRFhost (main frame) and PCRF21 for subsequent use to carry out alternately, thus when primary PCRF20 breaks down customer service unaffected (step S53); In like manner, P-CSCF19 also can continue to use former PCRFhost and PCRF21 for subsequent use to carry out alternately, and the business of user is not affected.Although the real-time hot reserve scheme of 1+1 has the function of PCRF disaster tolerance, but there is following shortcoming in the program: 1), cost is higher, PCRF21 for subsequent use is in standby (standby) state always under normal circumstances, any business cannot be processed, be equivalent to the function that two PCRF realize a PCRF; 2), primary and backup PCRF all user session information of backing up in realtime can affect equipment performance, reduce device processes ability, need additionally to buy more capacity of equipment to fill up the expense of backing up in realtime and bringing, and add equipment cost; 3), backup link require high reliability, need transmission network to be its bandwidth reserved, and need dual link backup be carried out; 4) specific implementation that, 1+1 backs up in realtime there is no unified standard at present, implement by each producer self-defining, because primary and backup PCRF may use different host titles, for ensureing interconnecting of different producer, PCEF and P-CSCF need transform, ignore PCRF host name comparatively to test and the renewal carrying out PCRF host name in time, to ensure the uninterrupted operation of business.
Embodiment two
The embodiment of the present invention provides a kind of policy control method, and in the method, be responsible for the primary PCRF state of perception by P-CSCF, described primary PCRF state comprises normal operating conditions or abnormal operation, is called for short normal or abnormal; When P-CSCF discovery PCRF occurs extremely, it is that UE re-establishes IMSPDN connection that notice S-CSCF triggers HSS.It should be noted that, in DRA networking, P-CSCF sets up link-attached by DRA and primary PCRF, therefore, P-CSCF can carry out the primary PCRF state of perception by DRA, certainly, when P-CSCF be by DRA and PCRF for subsequent use set up link be connected time, DRA also can the state of perception PCRF for subsequent use, below for DRA networking, Fig. 7-1 is the PCC network architecture schematic diagram of the embodiment of the present invention two, and Fig. 7-2 is the realization flow schematic diagram of the embodiment of the present invention two policy control method, as shown in Fig. 7-1 and Fig. 7-2, this flow process mainly comprises:
Step 701, DRA detects the state of link;
Particularly, DRA judges whether the link between described DRA and N number of primary PCRF occurs exception respectively; Here, described N be greater than 1 integer;
Step 702, link switching;
Particularly, when described DRA determines that exception appears in DRA described in any one and the link between primary PCRF, by the link switching between described DRA and the primary PCRF occurring exception to PCRF for subsequent use;
Step 703, user carries out VoLTE calling;
Here, the VoLTE calling that user carries out can be caller, also can be called.
Step 704, described P-CSCF sends to DRA and is used for occurring that abnormal primary PCRF asks the request message of special feature resource to described;
Here, described special feature resource comprises dedicated bearing number, bearer types, carrying bandwidth etc.;
Step 705, described request message is transmitted to described PCRF for subsequent use by described DRA;
Step 706, described PCRF for subsequent use sends the response message carrying error reason value to described DRA;
Here, because PCRF for subsequent use does not preserve this user-dependent session information, therefore by response message that DRA returns to P-CSCF, wherein, carry error reason value in described response message, described error reason value comprises IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID;
Step 707, described response message is transmitted to P-CSCF by described DRA;
Step 708, after described P-CSCF receives described response message, obtains corresponding error reason value by resolving described response message, then sends failure indication information to S-CSCF;
Here, described failure indication information adopts the session initiation protocol sip message of expansion to realize.Described failure indication information is for notifying S-CSCF, and S-CSCF is known, and primary PCRF breaks down, and triggering S-CSCF initiation home subscriber server (HSSHomeSubscriberServer) is user's reactivation flow process;
Step 709, after described S-CSCF receives described failure indication information, sends the reset Indication message being used to indicate P-CSCF and carrying out resetting to HSS;
Here, carry reset circuit value in described reset Indication message, described reset circuit value can be PCRF failure cause, can certainly be the other reasons value of indication reset;
Step 710, after described HSS receives described reset Indication message, sends reset Indication message to MME;
Step 711, after described MME receives described reset Indication message, sends to UE and is used to indicate the Indication message that UE initiates the attachment flow of IMSPDN network again, connects to rebuild IMSPDN;
Step 712, after described UE receives the Indication message of MME transmission, UE initiates attachment flow again.
Here, after UE adheres to again, select PCRF for subsequent use to rebuild Gx interface session by PCEF, so far, the VoLTE business of UE recovers normal completely.
In the embodiment of the present invention, P-CSCF is after the PCRF abnormal to appearance asks special feature resource, P-CSCF receives in the response message of PCRF for subsequent use reply and carries error reason value IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID, and then P-CSCF has occurred fault by the sip message notice S-CSCF network element PCRF of expansion; Then, after S-CSCF receives the sip message of above-mentioned expansion, the reset Indication message being used to indicate P-CSCF and carrying out resetting is sent to HSS; Then, after HSS receives P-CSCF reset Indication message, send P-CSCF reset Indication message to MME; After last MME receives P-CSCF reset Indication message, instruction UE initiates the attachment flow of IMSPDN network again, rebuilds IMSPDN and connects; So, solve the problem cannot carrying out VoLTE calling after existing network PCRF breaks down, compare the real-time Disaster Tolerant Scheme of 1+1 simultaneously, saved the expense of equipment cost and backup link.
Embodiment three
Based on the various embodiments described above, the present embodiment reoffers a kind of policy control method, and Fig. 8-1 is the realization flow schematic diagram one of the embodiment of the present invention three policy control method, and as shown in Fig. 8-1, the method is applied to P-CSCF, and described method comprises:
Step 801, UE to carry out in the process of VoLTE calling and P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, described P-CSCF receives the response message carrying error reason value that DRA forwards;
Here, carry error reason value in described response message, described error reason value comprises IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID;
Step 802, described P-CSCF, according to described error reason value, sends failure indication information to S-CSCF, and triggering HSS to make described S-CSCF is that described UE re-establishes IMSPDN connection.
Here, described failure indication information is used for making described S-CSCF trigger HSS is that described UE re-establishes IMSPDN connection.
Based on the various embodiments described above, the present embodiment reoffers a kind of policy control method, and the method is applied to DRA, and Fig. 8-2 is the realization flow schematic diagram two of the embodiment of the present invention three policy control method, and as shown in Fig. 8-2, described method comprises:
Step 811, DRA judges whether the link between described DRA and N number of primary PCRF occurs exception respectively;
Here, described N be greater than 1 integer;
Step 812, when described DRA determines that exception appears in DRA described in any one and the link between primary PCRF, by the link switching between described DRA and the primary PCRF occurring exception to PCRF for subsequent use;
Step 813, UE to carry out in the process of VoLTE calling and P-CSCF to described occur that abnormal primary PCRF asks special feature resource time, described DRA receives the response message carrying error reason value that described PCRF for subsequent use sends;
Here, carry error reason value in described response message, described error reason value comprises IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID;
Step 814, described response message is transmitted to P-CSCF by described DRA, so that it is that the public data network IMSPDN that described UE re-establishes internet protocol multimedia subsystem connects that described P-CSCF notifies that S-CSCF triggers HSS.
Here, for making described P-CSCF notify, S-CSCF triggers HSS to described response message is that the public data network IMSPDN that described UE re-establishes internet protocol multimedia subsystem connects.
Embodiment four
Based on above-mentioned policy control method, the embodiment of the present invention provides a kind of policy control device, and Fig. 9-1 is the composition structural representation of the embodiment of the present invention four policy control device, as shown in fig. 9-1, described policy control device 910 comprises P-CSCF911 and DRA912, wherein:
Described DRA912, for judging whether the link between described DRA and N number of primary PCRF occurs exception respectively;
Here, described N be greater than 1 integer;
Described DRA912, time also for determining that exception appears in DRA described in any one and the link between primary PCRF, by the link switching between described DRA and the primary PCRF occurring exception to PCRF for subsequent use;
Described DRA912, also for carry out at UE in the process of VoLTE calling and P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, to the response message carrying error reason value that described P-CSCF forwards;
Here, carry error reason value in described response message, described error reason value comprises IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER_UNKNOWN_SESSION_ID;
Described P-CSCF911, for sending failure indication information according to described error reason value to service call conversation control function S-CSCF, triggering home subscriber server HSS to make described S-CSCF is that the public data network IMSPDN that described UE re-establishes internet protocol multimedia subsystem connects.
Here, described failure indication information adopts the Session initiation protocol SIP message of expansion to realize.Described failure indication information is that the public data network IMSPDN that described UE re-establishes internet protocol multimedia subsystem connects for making described P-CSCF notification service CSCF S-CSCF trigger home subscriber server HSS.
In the embodiment of the present invention, described device also comprises S-CSCF, HSS and MME, wherein:
Described S-CSCF, after receiving described failure indication information, sends the reset Indication message being used to indicate P-CSCF and resetting to described HSS;
Described HSS, after receiving described reset Indication message, sends reset Indication message to MME;
Described MME, after receiving described reset Indication message, instruction UE initiates the attachment flow of IMSPDN network again, connects to rebuild IMSPDN.
In the embodiment of the present invention, described P-CSCF, is also used for occurring that abnormal primary PCRF asks the request message of special feature resource to described for sending to DRA;
Described DRA, also for described request message is transmitted to described PCRF for subsequent use;
Described DRA, also for receiving the response message carrying error reason value that described PCRF for subsequent use sends.
Based on the policy control method that above-described embodiment provides, the embodiment of the present invention provides a kind of P-CSCF, Fig. 9-2 to be the composition structural representation of the embodiment of the present invention four P-CSCF, as shown in Fig. 9-2, described P-CSCF920 comprises the first receiving element 921 and the first transmitting element 922, wherein:
Described first receiving element 921, for carry out at UE in the process of VoLTE calling and described P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, receive the response message carrying error reason value that DRA forwards;
Described transmitting element 922, for according to described error reason value, sends failure indication information to service call conversation control function S-CSCF;
Here, described failure indication information is used for making described S-CSCF to trigger home subscriber server HSS is that described UE re-establishes internet protocol multimedia subsystem IMSPDN and connects.
Based on the policy control method that above-described embodiment provides, the embodiment of the present invention provides a kind of DRA, Fig. 9-3 is the composition structural representation of the embodiment of the present invention four DRA, as shown in Fig. 9-3, described DRA930 comprises judging unit 931, switch unit 932, second receiving element 933 and retransmission unit 934, wherein:
Described judging unit 931, for judging whether described DRA and the link between N number of primary strategy and charging regulation unit PCRF occur exception respectively, and when there is exception in the link described in any one between DRA and primary PCRF, trigger described switch unit, wherein said N be greater than 1 integer;
Described switch unit, for by described DRA and occur that link switching between abnormal primary PCRF is to PCRF for subsequent use;
Described second receiving element 932, for carry out at UE in the process of VoLTE calling and P-CSCF to described occur that abnormal primary PCRF asks special feature resource time, receive the response message carrying error reason value that described PCRF for subsequent use sends;
Described retransmission unit 934, for described response message is transmitted to P-CSCF, so that it is that described UE re-establishes IMSPDN connection that described P-CSCF notifies that S-CSCF triggers HSS.
Here it is to be noted: the policy control device in the embodiment of the present invention four or the description of DRA or P-CSCF, it is similar for describing with above-mentioned policy control method, and the beneficial effect with policy control method describes, and does not repeat.For the ins and outs do not disclosed in the embodiment of policy control device of the present invention or DRA or P-CSCF, please refer to the description of the inventive method embodiment.
In several embodiments that the application provides, should be understood that disclosed equipment and method can realize by another way.Apparatus embodiments described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, and as: multiple unit or assembly can be in conjunction with, maybe can be integrated into another system, or some features can be ignored, or do not perform.In addition, the coupling each other of shown or discussed each part or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of equipment or unit or communication connection can be electrical, machinery or other form.
The above-mentioned unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location; Both can be positioned at a place, also can be distributed in multiple network element; Part or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in various embodiments of the present invention can all be integrated in a processing unit, also can be each unit individually as a unit, also can two or more unit in a unit integrated; Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that hardware also can be adopted to add SFU software functional unit realizes.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: movable storage device, read-only memory (Read-OnlyMemory, ROM), random access memory (RandomAccessMemory, RAM), magnetic disc or CD etc. various can be program code stored medium.
Or, if the above-mentioned integrated unit of the present invention using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprises some instructions and performs all or part of of method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server or the network equipment etc.).And aforesaid storage medium comprises: movable storage device, ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (22)
1. a policy control method, is characterized in that, described method comprises:
User equipment (UE) carry out network direct transfer VoLTE calling process in and Proxy Call Session Control Function P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, DRA forwards to described P-CSCF the response message carrying error reason value that PCRF for subsequent use returns;
Described P-CSCF is according to described error reason value, send failure indication information to service call conversation control function S-CSCF, described failure indication information is that the public data network IMSPDN that described UE re-establishes internet protocol multimedia subsystem connects for making described S-CSCF trigger home subscriber server HSS.
2. method according to claim 1, is characterized in that, described method also comprises:
After described S-CSCF receives described failure indication information, send the reset Indication message being used to indicate described P-CSCF and resetting to described HSS;
After described HSS receives described reset Indication message, send reset Indication message to mobile management unit MME;
After described MME receives described reset Indication message, indicate described UE again to initiate the attachment flow of described IMSPDN, connect to rebuild IMSPDN.
3. method according to claim 1, is characterized in that, described P-CSCF receive that DRA forwards carry the response message of error reason value before, described method also comprises:
Described P-CSCF sends to DRA and is used for occurring that abnormal primary PCRF asks the request message of special feature resource to described;
Described request message is transmitted to described PCRF for subsequent use by described DRA;
Described DRA receives the response message carrying error reason value that described PCRF for subsequent use sends.
4. the method according to any one of claims 1 to 3, is characterized in that, described failure indication information adopts the session initiation protocol sip message of expansion to realize.
5. the method according to any one of claims 1 to 3, it is characterized in that, described error reason value comprises Internet protocol and connects the unknown session identification DIAMETER_UNKNOWN_SESSION_ID of the unavailable IP-CAN_SESSION_NOT_AVAILABLE of access to network conversation or diameter DIAMETER.
6. a policy control method, is characterized in that, described method comprises:
User equipment (UE) carry out network direct transfer VoLTE calling process in and Proxy Call Session Control Function P-CSCF to when occurring that abnormal primary strategy and charging regulation unit PCRF ask special feature resource, described P-CSCF receives the response message carrying error reason value that Diameter route agent DRA forwards;
Described P-CSCF is according to described error reason value, send failure indication information to service call conversation control function S-CSCF, described failure indication information is that the public data network IMSPDN that described UE re-establishes internet protocol multimedia subsystem connects for making described S-CSCF trigger home subscriber server HSS.
7. method according to claim 6, is characterized in that, described failure indication information adopts the session initiation protocol sip message of expansion to realize.
8. the method according to claim 6 or 7, it is characterized in that, described error reason value comprises Internet protocol and connects the unknown session identification DIAMETER_UNKNOWN_SESSION_ID of the unavailable IP-CAN_SESSION_NOT_AVAILABLE of access to network conversation or diameter DIAMETER.
9. a policy control method, is characterized in that, described method comprises:
User equipment (UE) carry out network direct transfer VoLTE calling process in and Proxy Call Session Control Function P-CSCF to described occur that abnormal primary strategy and charging regulation unit PCRF ask special feature resource time, Diameter route agent DRA receives the response message carrying error reason value that described PCRF for subsequent use sends;
Described response message is transmitted to Proxy Call Session Control Function P-CSCF by described DRA, and described response message is that the public data network IMSPDN that described UE re-establishes internet protocol multimedia subsystem connects for making described P-CSCF notification service CSCF S-CSCF trigger home subscriber server HSS.
10. method according to claim 9, is characterized in that, described method also comprises:
Described DRA receives the request message of asking special feature resource for the primary PCRF abnormal to described appearance that described P-CSCF sends;
Described request message is transmitted to described PCRF for subsequent use by described DRA.
11. methods according to claim 9 or 10, it is characterized in that, described error reason value comprises Internet protocol and connects the unknown session identification DIAMETER_UNKNOWN_SESSION_ID of the unavailable IP-CAN_SESSION_NOT_AVAILABLE of access to network conversation or diameter DIAMETER.
12. 1 kinds of policy control devices, is characterized in that, described device comprises Proxy Call Session Control Function P-CSCF and Diameter route agent DRA, wherein:
Described DRA, for carry out at user equipment (UE) network direct transfer VoLTE calling process in and Proxy Call Session Control Function P-CSCF to when occurring that abnormal primary strategy and charging regulation unit PCRF ask special feature resource, forward to described P-CSCF the response message carrying error reason value that PCRF for subsequent use returns;
Described P-CSCF, for sending failure indication information according to described error reason value to service call conversation control function S-CSCF, described failure indication information is that the public data network IMSPDN that described UE re-establishes internet protocol multimedia subsystem connects for making described S-CSCF trigger home subscriber server HSS.
13. want the device described in 12 according to right, it is characterized in that, described device also comprises service call conversation control function S-CSCF, home subscriber server HSS and mobile management unit MME, wherein:
Described S-CSCF, after receiving described failure indication information, sends the reset Indication message being used to indicate P-CSCF and resetting to described HSS;
Described HSS, after receiving described reset Indication message, sends reset Indication message to MME;
Described MME, after receiving described reset Indication message, instruction UE initiates the attachment flow of IMSPDN network again, connects to rebuild IMSPDN.
14. devices according to claim 12, is characterized in that, described P-CSCF, are also used for occurring that abnormal primary PCRF asks the request message of special feature resource to described for sending to DRA;
Described DRA, also for described request message is transmitted to described PCRF for subsequent use;
Described DRA, also for receiving the response message carrying error reason value that described PCRF for subsequent use sends.
15., according to claim 12 to the device described in 14 any one, is characterized in that, described failure indication information adopts the session initiation protocol sip message of expansion to realize.
16. according to claim 12 to the device described in 14 any one, it is characterized in that, described error reason value comprises Internet protocol and connects the unknown session identification DIAMETER_UNKNOWN_SESSION_ID of unavailable IP-CAN_SESSION_NOT_AVAILABLE or DIAMETER of access to network conversation.
17. 1 kinds of Proxy Call Session Control Function P-CSCF, is characterized in that, described P-CSCF comprises the first receiving element and the first transmitting element, wherein:
Described first receiving element, for carry out at user equipment (UE) network direct transfer VoLTE calling process in and described P-CSCF to when occurring that abnormal primary PCRF asks special feature resource, receive the response message carrying error reason value that DRA forwards;
Described transmitting element, for according to described error reason value, send failure indication information to service call conversation control function S-CSCF, it is that described UE re-establishes internet protocol multimedia subsystem IMSPDN and connects that described failure indication information is used for making described S-CSCF to trigger home subscriber server HSS.
18. P-CSCF according to claim 17, is characterized in that, described failure indication information adopts the session initiation protocol sip message of expansion to realize.
19. P-CSCF according to claim 17 or 18, it is characterized in that, described error reason value comprises Internet protocol and connects the unknown session identification DIAMETER_UNKNOWN_SESSION_ID of the unavailable IP-CAN_SESSION_NOT_AVAILABLE of access to network conversation or diameter DIAMETER.
20. 1 kinds of Diameter route agent DRA, it is characterized in that, described DRA comprises the second receiving element and retransmission unit, wherein:
Described second receiving element, for carry out at user equipment (UE) network direct transfer VoLTE calling process in and Proxy Call Session Control Function P-CSCF to when occurring that abnormal primary strategy and charging regulation unit PCRF ask special feature resource, receive the response message carrying error reason value that described PCRF for subsequent use sends;
Described retransmission unit, for described response message is transmitted to Proxy Call Session Control Function P-CSCF, described response message is that the public data network IMSPDN that described UE re-establishes internet protocol multimedia subsystem connects for making described P-CSCF notification service CSCF S-CSCF trigger home subscriber server HSS.
21. DRA according to claim 20, is characterized in that, described second receiving element, also for receiving the request message of asking special feature resource for the primary PCRF abnormal to described appearance that described P-CSCF sends;
Accordingly, described retransmission unit, also for described request message is transmitted to described PCRF for subsequent use.
22. DRA according to claim 20 or 21, it is characterized in that, described error reason value comprises Internet protocol and connects the unknown session identification DIAMETER_UNKNOWN_SESSION_ID of the unavailable IP-CAN_SESSION_NOT_AVAILABLE of access to network conversation or diameter DIAMETER.
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