CN103024714B - Method and device for auditing Gx interface conversation in policy control and charging (PCC) system - Google Patents
Method and device for auditing Gx interface conversation in policy control and charging (PCC) system Download PDFInfo
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Abstract
The invention relates to the field of communication, and discloses a method and a device for auditing the Gx interface conversation in a policy control and charging (PCC) system. The method comprises the following specific steps: after a first device of a first interaction entity of a Gx interface sends the control message to a second device of a second interaction entity, when the feedback control message of the second device is not received, the first device does not make assumption on whether the second device executes the control message successfully or not, but sends the auditing request message which carries international mobile subscriber identity (IMSI) to the second device after the Gx interface communicates normally, judges whether the second device executes the related operation according to the information which is carried by the control message or not and determines to send the control message again and execute other operation or not according to the received auditing request message which is fed back from the second device, and thus, for the same conversation, the problem of inconsistent conversation service states of the devices on the two sides of the interaction entity of the Gx interface is solved.
Description
Technical field
The present invention relates to the communications field, a kind of method that particularly in PCC system, Gx interface session is checked and device.
Background technology
Universal along with the development of mobile network's technology and 3G business, more and more user brings into use mobile Internet business, greatly facilitates the flourish of data service and dats services with increment.The instant feature of 3G network and mobile Internet business makes user expect, and they can obtain the most real-time account information, mobile operator and affiliate thereof then expect to understand the dynamic of market development by inquiry and analysis communication service data in real time, can really promptly service be introduced to the market according to the demand of user, strengthen its market competitiveness, and improve income.Therefore, the GPRS(General Packet Radio Service of supported data business real time billing, general packet radio service technology) Online Charging System becomes the focus studied in charge system field and is badly in need of the functional requirement that realizes.
For the charging scene of above-mentioned user, 3GPP defines PCC(strategy and charging controls, Policy Control and Charging) framework, meet with this and different QoS(Quality of Service is carried out to different business, service quality) control and accounting requirements.Be defined PCC framework in TS 23.203, shown in Figure 1, wherein the functional description of each entity is as follows:
AF(Application Function): Application Function, be mainly PCRF(Policy Control and Charging Rules Function, policy control and charging rule functions) generate strategy and charging control rule application layer conversation information is dynamically provided.
PCRF: policy control and charging controlling functions entity.According to the restriction of user access network, the current ongoing applied business information of user, the configuration of local operator and user signing contract information, formulate corresponding strategy, and strategy is supplied to PCEF(Policy Control and Charging Enforcement Function, strategy and charging execution function entity) perform.Strategy comprises: business data flow detection, QoS control, gate and the charging etc. based on stream.Adopting Gx with the interface of PCEF, is the application protocol based on Diameter.
Each interface function is described below:
Rx: this reference point is used for AF and issues application layer conversation relevant information, comprise the IP(Internet Protocol for identification services data flow, Internet protocol) filter, bandwidth information needed for Business Stream, this interface uses the Diameter of ietf definition.
Gx: this reference point is used for the PCC rule that PCRF Dynamic controlling PCEF performs.Possess following functions: set up, safeguard and stop IP-CAN(IP Connectivity Access Network, IP connects Access Network) session; PCEF asks PCC rule to PCRF; PCRF provides PCC rule to PCEF; Consult IP-CAN and carry establishment model etc.This reference point uses the Diameter of ietf definition.
All the other entities, such as, SPR(Subscription Profile Repository, CAMEL-Subscription-Information storehouse), OCS(Online Charging System, Online Charging System), OFCS(Offline Charging System, off-line accounting system) and interface (Sp, Gy, Gz) and content of the present invention have nothing to do, no longer Ao Shu here.
In prior art, PGW(PDN Gateway is closed in the networking of core network element packet count, grouped data network gateway) pass through Gx interactive interfacing with PCRF, set up IP-CAN session, implementation strategy controls, specifically as shown in Figure 2.At Gx interface, Gx Session ID(Identification, mark) identify an IP-CAN session uniquely.
Consult shown in Fig. 3 A, adhere to as user or set up PDN(Packet Data Network, Packet Data Network) when connecting, PGW is by CCR-I(Credit Control Request-Initial, credit control request-initial) the message request PCRF PCC that performs session establishment authorizes, PCRF sends ULR(Update Location Request position updating request) after the subscription data of SPR acquisition user, implementation strategy decision-making, QoS mandate is carried out to session and rule, and the PCC list of thing information that is regular and needs subscription after authorizing is passed through CCA(Credit Control Answer, Credit Control Answer) message sends to PGW.In session keep-process, PCRF can pass through RAR(Re-Auth-Request, again authorizes) message performs the mandate again of PCC rule, or upgrade reported event list, PGW is by RAA(Re-Auth-Answer, again authorization response) message responds, specifically as shown in Figure 3 B.
Further, when user's attachment removal or PDN connect delete time, PGW by CCR-T(Credit Control Request-Terminate, credit control request-termination) message request PCRF performs the release of session association resource, after PCRF removes related resource, respond CCA message.If this session is last session of user, PCRF sends PUR(Purge User Request to SPR and removes user's request) request cancellation subscription data, specifically as shown in Figure 3 C.
At present, in prior art, at least there are the following problems:
1) PCRF can send RAR message to PGW, set up the new regulation in session, or amendment and the old rule of deleting in session, because Gx interface link fault, the RAR(that PCRF sends comprise to introduce resending after retransmission mechanism) message may lose, or, the RAR message that PCRF sends is not lost, but, the RAA(of the success that PGW returns or failure comprise introduce retransmission mechanism after resend) response message loses, like this, in case of no response: PCRF supposes new regulation success, but, PGW is this new regulation of unsuccessful execution likely, therefore, PCRF and PGW both sides are inconsistent for the service condition of new session, or PCRF supposes new regulation failure, but PGW likely performs this new regulation, and therefore, PCRF and PGW both sides still exist inconsistent for the service condition of new session,
2) PGW sends to PCRF session release CCR(comprise introduce retransmission mechanism after resend) message, because Gx interface link fault, CCR message cannot be sent to PCRF within a certain period of time, but, now PGW has removed local corresponding user session information, and PCRF does not receive CCR message, therefore, the upper corresponding user session information of PCRF can not be clear, when above-mentioned session is not deleted by PCRF, now, this session is deleted by PGW, in this case, PCRF and PGW both sides exist inconsistent for the service condition of above-mentioned session.
Summary of the invention
The embodiment of the present invention provides a kind of method that in PCC system, Gx interface session is checked, in order to solve in PCC system, when the interworking entity first device of Gx interface and the second device carry out mutual, identical session service is in the inconsistent problem of the service condition of both sides device.
The method that in PCC system, Gx interface session is checked, comprising:
After first device transmits control message to the second device, if described first device does not receive the control response message that described second device returns, after Gx link-recovery, then by Gx interface to described second device send carry at least one international mobile subscriber identification code IMSI check request message;
Described first device according to by Gx interface to described second device return check request response perform associative operation, wherein, describedly check in request response all session informations carrying and produce based on described at least one IMSI, and the state information of strictly all rules under each session.
The device that in PCC system, Gx interface session is checked, comprising:
Communication unit, after transmitting control message to another device, if described communication unit does not receive the control response message that another device described returns, after Gx link-recovery, then by Gx interface to described another device send carry at least one international mobile subscriber identification code IMSI check request message;
Performance element, for according to by Gx interface to described in another device return check request response perform associative operation, wherein, describedly check in request response all session informations at least carrying and produce based on described at least one IMSI, and the state information of strictly all rules under each session.
In the embodiment of the present invention, in PCC system, two interworking entity of Gx interface are first device and the second device, after first device transmits control message to the second device, if first device does not receive the control response message that the second device returns, after Gx link-recovery, then by Gx interface to second device send carry at least one IMSI(International Mobile Subscriber Identity, international mobile subscriber identification code) check request message, first device according to by Gx interface to the second device return check request response perform associative operation, wherein, check in request response all session informations carrying and produce based at least one IMSI, and the state information of strictly all rules under each session, that is, after first device transmits control message to the second device, when not receiving the control message that the second device returns, first device is to the second device whether successful execution control message, do not do and suppose, but after Gx interface communication is normal, to the second device send carry IMSI check request message, judge that whether the second device is according to the information and executing associative operation that control message carries, return check that request message is confirmed whether to resend control message and performs other operations according to receiving the second device again, thus avoid in PCC system, when the interworking entity first device of Gx interface and the second device carry out mutual, identical session service is in the inconsistent problem of the service condition of both sides device.
Accompanying drawing explanation
Fig. 1 is PCC framework schematic diagram in prior art;
Fig. 2 is the schematic diagram of PGW and PCRF in PCC framework in prior art;
Fig. 3 A is the schematic diagram setting up PDN connection in prior art between PGW and PCRF;
Fig. 3 B is the schematic diagram keeping session in prior art between PGW and PCRF;
Fig. 3 C is the schematic diagram deleting PDN connection in prior art between PGW and PCRF;
Fig. 4 is the illustrative view of functional configuration of first device in the embodiment of the present invention;
Fig. 5 is the detailed process schematic diagram that in the embodiment of the present invention, in PCC system, Gx interface session is checked.
Embodiment
In order to avoid in PCC system, when the interworking entity first device of Gx interface and the second device carry out mutual, identical session service the service condition of both sides device inconsistent situation, in the embodiment of the present invention, after the first instance first device of Gx interface transmits control message to second instance second device, when not receiving the control message that the second device returns, can first device correctly perform control message, do not succeed or the hypothesis of failure, but after Gx link-recovery is normal, to the second device send carry IMSI check request message, judge that whether the second device is according to the information and executing associative operation that control message carries, return check that request message is confirmed whether to resend control message and performs other operations according to receiving the second device again, thus solve for identical session service, there is inconsistent problem in the service condition of Gx interactive interfacing entity both sides device.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
Consult shown in Fig. 4, in the embodiment of the present invention, first device comprises communication unit 40, performance element 41, wherein,
Communication unit 40, after transmitting control message to another device, if described communication unit does not receive the control response message that another device described returns, after Gx link-recovery, then by Gx interface to described another device send carry at least one international mobile subscriber identification code IMSI check request message;
Performance element 41, for according to by Gx interface to described in another device return check request response perform associative operation, wherein, describedly check in request response all session informations at least carrying and produce based on described at least one IMSI, and the state information of strictly all rules under each session.
Based on technique scheme, consult shown in Fig. 5, in the embodiment of the present invention, the detailed process that in PCC system, Gx interface session is checked is as follows:
Step 500: after first device transmits control message to the second device, if first device does not receive the control response message that the second device returns, after Gx link-recovery, then by Gx interface to the second device send carry at least one IMSI check request message.
In the embodiment of the present invention, after first device transmits control message to the second device, second device will return control response message to first device, in actual applications, after first device transmits control message to the second device, first device may not receive the control response message that the second device returns, and wherein, what first device did not receive the control response message that the second device returns mainly contains following reason:
After A, first device transmit control message to the second device, due to Gx link failure, control message is lost, and therefore, the second device does not receive control message, and then the second device also can not return control response message to first device;
After B, first device transmit control message to the second device, the second device returns control response message to first device, and due to Gx link failure, control response information drop-out, therefore, first device does not receive the control response message that the second device returns.
Be PGW below with first device, the second device is that PCRF, PGW are released to example to the session of PCRF transmission CCR message request.
PGW sends CCR message to PCRF, request releasing session, if PGW does not receive the CCR response message that PCRF returns, i.e. CCA message, then mainly contain the CCA message that two kinds of situations cause PGW not receive PCRF returning:
After A, PGW send CCR message to PCRF, due to Gx link failure, CCR information drop-out, therefore, PCRF does not receive the CCR message that PGW sends, and then PCRF also can not return CCR response message to PGW, i.e. CCA message;
After B, PGW send CCR message to PCRF, PCRF returns CCA message, and due to Gx link failure, CCA information drop-out, therefore, PGW does not receive the CCA message that PCRF sends.
In the embodiment of the present invention, after first device transmits control message to the second device, if first device does not receive the control response message that the second device returns, then check request message by Gx interface to the second device transmission, meanwhile, this checks that request message can carry an IMSI, also can carry multiple IMSI, wherein, an IMSI talks with corresponding with at least one between first device and the second device.
In the embodiment of the present invention, first device transmits control message to the second device based on 29.212 agreements, when not receiving the control response message of the second device, is also check request message based on 29.212 agreements to the second device transmission; In like manner, the second device returns control response message based on 29.212 agreements to first device, receive that first device sends check request message time, be also to return to first device based on 29.212 agreements to check request response.
In the embodiment of the present invention, the interworking entity of Gx interface is first device and the second device, and wherein, the combination of first device and the second device has two kinds of situations: first device is PGW, and the second device is PCRF; Or first device is PCRF, the second device is PGW.
First device is PGW and the second device when being PCRF, after PGW sends credit control request CCR message to PCRF, if PGW does not receive the Credit Control Answer CCA message that PCRF returns, PGW discharges local all or part of session, but the corresponding IMSI of session of record release, after Gx link-recovery is normal, by Gx interface to PCRF send carry at least one IMSI check request message, wherein, PGW performs the release of session association resource by CCR message request PCRF, after PCRF removes related resource, respond CCA message, further, if this session is last session of user, PCRF sends PUR to SPR and removes subscription request message, the subscription data of respective user is cancelled in request.
First device is PCRF and the second device when being PGW, after PCRF sends again mandate RAR message to PGW, if PCRF does not receive the RAA of the authorization response again message that PGW returns, then PCRF does not make any amendment to the state of the type of service of session, the corresponding IMSI of record authorisation session, after Gx link-recovery is normal, by Gx interface to PGW send carry at least one IMSI check request message, wherein, PCRF can perform the mandate again of PCC rule by RAR again authorization messages, or, upgrade reported event list, PGW is again authorized by RAA and answers message to respond.
Step 510: first device according to by Gx interface to the second device return check request response perform associative operation, wherein, check in request response all sessions of carrying and producing based at least one IMSI, and the state of strictly all rules under each session.
In the embodiment of the present invention, when first device is PGW, PGW according to by Gx interface to PCRF return check request response, the associative operation performed, when being PCRF with first device, PCRF according to by Gx interface to the second device return check request response, the associative operation of execution is different, is specially:
First device is PGW and the second device when being PCRF, PGW sends CCR message to PCRF, the all or part of session that at least one IMSI of request release is corresponding, PGW does not receive the response message of the CCR message that PCRF returns, namely during CCA message, after Gx link-recovery is normal, PGW to PCRF send carry at least one IMSI check request message, PCRF returns and checks request response, the rule state of the type of service of the session produced based on each IMSI carried in request message is carried in response message, what PGW judged to receive checks whether the part or all of session that at least one IMSI of carrying in request response is corresponding discharges, if, then resend CCR message, discharge corresponding session, otherwise, do not perform any operation.
First device is PCRF and the second device when being PGW, PCRF sends RAR message to PGW, the new regulation of session is set up in request, or, amendment, delete the old rule of session, when PCRF does not receive the RAA message that PGW returns, after Gx link-recovery is normal, PCRF to PGW send carry at least one IMSI check request message, PGW returns and checks request response, the rule state of the type of service of the session produced based on each IMSI carried in request message is carried in response message, what PCRF judged to receive checks that whether the state of the type of service of the part or all of session that at least one IMSI of carrying in request response is corresponding is consistent with the dbjective state of the session that this locality is revised, if, then resend RAR message and revise the state of session, otherwise directly upgrade the state of type of service corresponding to local corresponding session, wherein, the rule of session refers to the description of the business to this session, e.g., the QoS information, charge information etc. of business.Such as, for HTTP business, the rule of business comprises, and adopts UL 1M, UL 2M, and charging adopts Rating Group ID-2 etc.
In sum, in the embodiment of the present invention, in PCC system, two interworking entity of Gx interface are first device and the second device, after first device transmits control message to the second device, if first device does not receive the control response message that the second device returns, first device is to the second device whether successful execution control message, do not do and suppose, but after Gx interface communication is normal, by Gx interface to the second device send carry at least one IMSI check request message, first device according to by Gx interface to the second device return check request response perform associative operation, wherein, check in request response all sessions of carrying and producing based at least one IMSI, and the service condition that each session is corresponding, that is, after first device transmits control message to the second device, when not receiving the control message that the second device returns, first device is to the second device whether successful execution control message, do not do and suppose, but after Gx interface communication is normal, but to the second device send carry IMSI check request message, judge that whether the second device is according to the information and executing associative operation that control message carries, return check that request message is confirmed whether to resend control message and performs other operations according to receiving the second device again, thus avoid in PCC system, when the interworking entity first device of Gx interface and the second device carry out mutual, for identical session, Gx interface both sides device is for the inconsistent situation of the state of this session.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the embodiment of the present invention and not depart from the spirit and scope of the embodiment of the present invention.Like this, if these amendments of the embodiment of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. the method that in strategy and charging control PCC system, Gx interface session is checked, is characterized in that, comprising:
After first device transmits control message to the second device, if described first device does not receive the control response message that described second device returns, after Gx link-recovery, then by Gx interface to described second device send carry at least one international mobile subscriber identification code IMSI check request message;
Described first device judges that whether described second device is according to the information and executing associative operation that described control message carries, and according to by Gx interface to described second device return check that request response is confirmed whether to resend described control message and performs other operations, wherein, describedly check in request response all session informations carrying and produce based on described at least one IMSI, and the state information of strictly all rules under each session.
2. the method for claim 1, is characterized in that, described first device is grouped data network gateway PGW, and described second device is charging regulation controlling functions PCRF; Or described first device is PCRF, described second device is PGW.
3. method as claimed in claim 2, is characterized in that, described first device to transmit control message to described second device based on third generation partner program 3GPP technical specification TS 29.212 agreement and checks request message; Described first device receives control response message that described second device returns based on 3GPP TS 29.212 agreement and checks request response.
4. method as claimed in claim 2, it is characterized in that, after described first device transmits control message to the second device, if described first device does not receive the control response message that described second device returns, then by Gx interface to described second device send carry at least one IMSI check request message, comprising:
Described first device is PGW and described second device when being PCRF, after described PGW sends credit control request CCR message to PCRF, if described PGW does not receive the Credit Control Answer CCA message that described PCRF returns, then by Gx interface to described PCRF send carry at least one IMSI check request message;
Described first device is PCRF and described second device when being PGW, after described PCRF sends again mandate RAR message to PGW, if described PCRF does not receive the RAA of the authorization response again message that described PGW returns, then by Gx interface to described PGW send carry at least one IMSI check request message.
5. the method as described in any one of claim 2-4, is characterized in that, described first device according to by Gx interface to described second device return check request response perform associative operation, comprising:
Described first device is PGW and described second device when being PCRF, checks whether the session that at least one IMSI of carrying in request response is corresponding discharges, and if so, then resends CCR message, discharges described session described in described PGW judges to receive; Otherwise, do not perform any operation;
Described first device is PCRF and described second device when being PGW, check that whether the state of the type of service of the session that at least one IMSI of carrying in request response is corresponding is consistent with the dbjective state of the described session that this locality is revised described in PCRF judges to receive, if so, then resend RAR message and revise the state of described session; Otherwise, directly upgrade the state of type of service corresponding to local described session.
6. the device that in strategy and charging control PCC system, Gx interface session is checked, is characterized in that, comprising:
Communication unit, after transmitting control message to another device, if described communication unit does not receive the control response message that another device described returns, after Gx link-recovery, then by Gx interface to described another device send carry at least one international mobile subscriber identification code IMSI check request message;
Performance element, for judging that whether another device described is according to the information and executing associative operation that described control message carries, and according to by Gx interface to described in another device return check that request response is confirmed whether to resend described control message and performs other operations, wherein, describedly check in request response all session informations at least carrying and produce based on described at least one IMSI, and the state information of strictly all rules under each session.
7. device as claimed in claim 6, it is characterized in that, this device is grouped data network gateway PGW, and another device described is charging regulation controlling functions PCRF; Or this device is PCRF, another device described is PGW.
8. device as claimed in claim 7, is characterized in that, described communication unit to transmit control message to another device described based on third generation partner program 3GPP technical specification TS 29.212 agreement and checks request message; Described communication unit receives the control response message that another device described returns based on 3GPP TS 29.212 agreement, described performance element receive that another device described returns based on 3GPP TS 29.212 agreement with check request response.
9. device as claimed in claim 7, is characterized in that, described communication unit specifically for:
Described device is PGW and another device described when being PCRF, after described communication unit sends credit control request CCR message to PCRF, if described communication unit does not receive the Credit Control Answer CCA message that described PCRF returns, then by Gx interface to described PCRF send carry at least one IMSI check request message;
Described device is PCRF and another device described when being PGW, after described communication unit sends again mandate RAR message to PGW, if described communication unit does not receive the RAA of the authorization response again message that described PGW returns, then by Gx interface to described PGW send carry at least one IMSI check request message.
10. the device as described in any one of claim 7-9, is characterized in that, described performance element specifically for:
Described device is PGW and another device described when being PCRF, checks whether the session that at least one IMSI of carrying in request response is corresponding discharges, and if so, then resends CCR message, discharges described session described in described performance element judges to receive; Otherwise, do not perform any operation;
Described device is PCRF and another device described when being PGW, check described in described performance element judges to receive that whether the state of the type of service of the session that at least one IMSI of carrying in request response is corresponding is consistent with the dbjective state of the described session that this locality is revised, if so, then resend RAR message and revise the state of described session; Otherwise, directly upgrade the state of type of service corresponding to local described session.
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| CN103957542B (en) * | 2014-03-14 | 2017-11-03 | 大唐移动通信设备有限公司 | The method and device that a kind of service bearer is set up |
| CN108616833B (en) * | 2016-12-08 | 2021-03-09 | 中国移动通信集团四川有限公司 | Method, device and system for processing PCC conversation, PGW and PCRF |
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| EP2506493A1 (en) * | 2010-03-31 | 2012-10-03 | Huawei Technologies Co., Ltd. | Method and device for controlling data flow of subscriber service |
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