CN101335632B - Method for selecting charging system in next-generation network - Google Patents
Method for selecting charging system in next-generation network Download PDFInfo
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Abstract
The invention discloses a method for choosing a charging system in an NGN. In a push mode charging process, the method comprises the steps that after an SCF chooses a charging system for a service, the address of the charging system is contained in a request message for resource initialization and sent to a PD-FE; after receiving the request message for resource initialization sent by the SCF, the PD-FE carries out strategy decision-making, authorization, resource validity check and final acceptance decision-making to the requested QoS resource; after the final acceptance decision-making is completed, the PD-FE checks the address of the charging system contained in the request message of resource initialization; if the checking result shows that the charging system chosen by the SCF is the available charging system in the network, the address of the charging system is sent to the PE-FE which is informed to use the charging system corresponding to the address to carry out charging operation. By adopting the method of the invention, the choosing efficiency of the charging system of the NGN network and usability of the charging system can be improved.
Description
Technical field
The present invention relates to the communications field, relate in particular to the method for selecting charge system in a kind of next generation network.
Background technology
NGN (Next Generation Network, next generation network) being one in concept transmits based on grouping, voice, data and multimedia integration service can be provided, can guarantee service quality and safety, and comprehensive various access way, can make the third party that the desirable communication network of application is provided easily.The standardization body of at present a lot of international and regional property is all being studied NGN, and the operator of a lot of countries is also actively disposing NGN.But all also be in a stage that partial service and part ability only can be provided about the research of NGN and the deployment of network at present.Along with deepening continuously of research and improving day by day and enhancing of capacity of equipment, the NGN that is built in the future can provide more business.
ITU (International Telecom Union, International Telecommunications Union) is the main research organization of NGN, the general frame of NGN has been proposed, the standard of the NGN Releasel (version 1) that releases is mainly supported artificial service, multimedia service, the PSTN/ISDN analog service of PSTN/ISDN (Public Switched Telephone Network/Integrated ServicesDigital Network, PSTN/integrated services digital network) at present.
Fig. 1 is the general frame schematic diagram of NGN.As shown in Figure 1, NGN comprises two aspects: service layer and transmission aspect.
Transport layer bread contains: transmitting function, transmission controlled function etc.The transmission controlled function comprises: the controlled function of network attached device, resource and permission controlled function and transport layer user attribute database.
Service layer comprises: service control function, operation layer user attribute database and application/business support function, and by API (Application Programming Interface, API) access application.
Along with the construction in broadband and carrying out of NGN business, adopting which type of charging means (such as according to flow, duration, content) that business is accurately chargeed is the important problem that faces at present, and NGN is also stepping up to study the relevant framework that charges for this reason.Research to NGN charging framework is carried out in the 13rd seminar, present Release2 (version 2) has proposed the charging framework based on strategy, introduced RACF (ResourceAdmission Control Function, the resource authorization controlled entity), and how transmission layer entity and charging triggering function entity are carried out charge information defines alternately as the charging policy controlled entity.The charging framework of NGN specifically is described below as shown in Figure 2 in the prior art:
SCF (Service Control Functions, service control function): by the Rs reference point to PD-FE (Policy Decision Function Entity, policy deciding functional entity) initiates resource request, and can receive related announcement at resource reservation or after discharging;
NACF (Network Attachment Control Function, network attachment controlled function): Access Layer registering functional and user terminal function of initializing are provided, make user terminal can be linked into the NGN business; NACF provides network level sign and authentication, management Access Network IP (Internet Protocol, Internet Protocol) address space and docks session and carries out the function of authentication, and the contact point of NGN service/application support function is provided to user terminal;
PD-FE: the business information that policing rule Network Based, SCF provide, NACF (NetworkAttachment Control Function, the network attachment controlled function) transport layer CAMEL-Subscription-Information that provides and TRC-FE (Transport Resource Control Functional Entity, transport layer resource control function entity) the resource and admission result of decision that provides is made the last decision-making of network resource admission control;
PE-FE (Policy Enforcement Function Entity, policy execution functional entity): carry out the strategy of receiving from PD-FE;
TRC-FE: be responsible for collecting and safeguarding the topological sum resource state information that transmits net, the use of the availability of topological structure Network Based, connectivity, network and node resource and the control of the network informations such as transport layer CAMEL-Subscription-Information in Access Network resource provides and transmits network admittance controlling decision;
The concrete function of TRE-FE (Transport Resource Enforcement Functional Entity, the transport layer resource is carried out functional entity) is still in the process of further research.
Present charging method comprises offline charging and online charging, and corresponding charge system is called OFCS (Offline Charging System, off-line accounting system) and OCS (Online Charging System, Online Charging System).
In the present NGN network, the address of OFCS and OCS all is that static configuration is on the network element that comprises Accounting Client (as PE-FE).After charging event was triggered, Accounting Client sent to corresponding charge system to charge information and charges according to the charge system address that has configured.
Employing is enough in the method for the single charge system of Accounting Client static configuration for the network of single charge system, if but dispose a plurality of charge systems in a network, then this method lacks flexibility.Break down or load when excessive such as a charge system, will be on PE-FE manual configuration charge system address again, and in the process of manual configuration, just might cause losing of charge information.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, and a kind of method of dynamically obtaining and selecting the charge system address is provided, and improves the flexibility of NGN system and the availability of charge system.
In order to address the above problem, the invention provides the method for selecting charge system in a kind of next generation network, when adopting push-model to charge, comprising:
After business control function body is the service selection charge system, the address packet of described charge system is contained in the initializing resource request message sends to policy deciding functional entity;
After receiving the initializing resource request message that business control function body sends, policy deciding functional entity carries out strategic decision-making and mandate, resource availability inspection to described professional institute requested service quality resource, and carries out final admittance decision-making;
After final admittance decision-making was finished, policy deciding functional entity was checked the charge system address that is included in the described initializing resource request message;
If check result shows that by the selected charge system of business control function body be charge system available in the present networks, then described charge system address is sent to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
In addition, if the charge system Type-Inconsistencies that has disposed in charge system that business control function body is selected and the policy deciding functional entity, then policy deciding functional entity is reselected a new charge system that has disposed, and the address of selected charge system sent to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
In addition, policy deciding functional entity is contained in described charge system address packet in the initializing resource request message and sends to policy execution functional entity.
The present invention also provides the method for selecting charge system in a kind of next generation network, when adopting pull-mode to charge, comprising:
After receiving the resource decision request message of the business that policy execution functional entity sends, policy deciding functional entity sends resource behavior request message to business control function body;
Business control function body is described service selection charge system, and selected charge system address packet is contained in the resource behavior response message sends to policy deciding functional entity;
After receiving the resource behavior response message that business control function body sends, policy deciding functional entity carries out strategic decision-making and mandate, resource availability inspection to described professional institute requested service quality resource, and carries out final admittance decision-making;
After final admittance decision-making was finished, policy deciding functional entity was checked the charge system address that is included in the described resource behavior response message;
If check result shows that by the selected charge system of business control function body be charge system available in the present networks, then described charge system address is sent to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
In addition, if the charge system Type-Inconsistencies that has disposed in charge system that business control function body is selected and the policy deciding functional entity, then policy deciding functional entity is reselected a new charge system that has disposed, and the address of selected charge system sent to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
In addition, policy deciding functional entity is contained in described charge system address packet in the resource decision response message and sends to policy execution functional entity.
The present invention also provides in a kind of next generation network the method for selecting charge system, and comprising when unusual appears in the charge system of current use:
Unusual charge system address takes place by sending the change in resources request message to policy deciding functional entity and carrying in policy execution functional entity in described message, a charge system address is reselected in request;
Policy deciding functional entity is checked the address of the unusual charge system of described generation, if it is before selected by policy deciding functional entity that check result shows described charge system, then policy deciding functional entity is reselected a charge system that type is identical, and the address packet of selected charge system is contained in the change in resources response message sends to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation;
The type of described charge system comprises Online Charging System and off-line accounting system.
In addition, if it is before selected by business control function body that the result that policy deciding functional entity is checked the address of the unusual charge system of described generation shows described charge system, then policy deciding functional entity is transmitted to business control function body with described change in resources request message;
Business control function body is reselected the charge system of a same type according to the address of the unusual charge system of described generation, and the address of selected charge system is sent to policy deciding functional entity by the change in resources response message;
Policy deciding functional entity is checked the charge system address in the change in resources response message that is included in the business control function body transmission, if check result shows that by the selected again charge system of business control function body be charge system available in the present networks, then described charge system address packet is contained in the change in resources response message and sends to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
In addition, if the charge system Type-Inconsistencies that has disposed in charge system that business control function body is selected again and the policy deciding functional entity, then policy deciding functional entity is reselected a new charge system that has disposed, and the address packet of selected charge system is contained in the change in resources response message sends to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
In sum, the present invention passes through by the SCF charge system different according to the dissimilar selections of business, and when charge system broke down, real-time replacing charge system had improved the efficiency of selection of charge system in the NGN system and the availability of charge system.
Description of drawings
Fig. 1 is the general frame schematic diagram of NGN;
Fig. 2 is the charging framework schematic diagram of NGN in the prior art;
Fig. 3 is that the embodiment of the invention adopts the method flow diagram of selecting/issue the charge system address when pushing away the charging of (PUSH) pattern in NGN;
Fig. 4 be the embodiment of the invention charge system when unusual SCF/PD-FE reselect the method flow diagram of charge system address;
Fig. 5 is that the embodiment of the invention adopts the method flow diagram of selecting/issue the charge system address when drawing the charging of (PULL) pattern in NGN.
Embodiment
Describe the present invention below in conjunction with drawings and Examples.
Fig. 3 is that the embodiment of the invention adopts the method flow diagram of selecting/issue the charge system address when pushing away the charging of (PUSH) pattern in NGN, comprises the steps:
301, initializing resource request (Resource Initiation Request is called for short RIR) is triggered by SCF;
302, SCF determines corresponding professional QoS (Quality of Service, service quality) parameter (as bandwidth and class of service) or from this professional medium stream information, derive the qos parameter (as bandwidth and class of service) of being asked after, the Rs interface by expansion sends the initializing resource request message to PD-FE;
Comprise in the above-mentioned initializing resource request message: this professional Media Stream descriptor and relevant qos parameter, so that PD-FE carries out QoS resource authorization and reservation;
In addition, SCF also selects charge system according to this professional service attribute, and selected charge system (OCS or OFCS) address packet is contained in the Rs interface by expansion is handed down to PD-FE in the initializing resource request message.
The Rs interface of the present invention's expansion is compared with existing Rs interface, has increased by two fields (being respectively OFCS address and OCS address), can carry the charge system address in the operation layer information that makes operation layer issue; Like this can be so that different business is used different charge systems.
303, receive above-mentioned initializing resource request message after, PD-FE carries out strategic decision-making and mandate to the QoS resource of this request, authorizes by the back and carries out next step;
Specifically, PD-FE above-mentioned strategic decision-making that the QoS resource is carried out with authorizing is exactly: check whether the QoS resource (qos parameter) of asking in Media Stream descriptor in the initializing resource request message, the initializing resource request and the network strategy rule of PD-FE and the transmission inventory information that obtains from NACF (as the upstream and downstream bandwidth that customizes, greatest priority etc.) be consistent.
304.PD-FE alternately the QoS resource (qos parameter) of request is carried out the resource availability inspection with TRC-FE, validity check is carried out next step by the back;
305, PD-FE is according to determining final admittance decision-making with the interaction results of PE-FE and TRC-FE:
If the result of decision is not admit resource request, PD-FE sends the initializing resource response message that excludes resource request to SCF, comprises Reason For Denial in this message, and this flow process finishes;
If the result of decision is to admit resource request, PD-FE carries out the verification and the selection of charge system address, and verification and selection result is included in the initializing resource request of follow-up transmission and sends to PE-FE; Verification and selection strategy specifically comprise:
A:PD-FE carries out the availability verification to the charge system address that SCF issues: if this charge system is an available charge system in the present networks, then PD-FE adopts the charge system address that SCF issues; Available charge system in the present networks, then PD-FE selects the charge system of a same type in the charge system of this locality configuration;
B: if PD-FE need reselect charge system (being that check results among the A is that the charge system address that SCF issues is not available charge system address in the present networks), then PD-FE carries out the type consistency desired result to the charge system address that SCF issues: if the charge system of charge system type that has disposed among the PD-FE and SCF appointment is inconsistent (for example, SCF specifies and uses Online Charging System, but PD-FE has only disposed the off-line accounting system address), then PD-FE reassigns a new charge system that has disposed.
306, if the result of decision in the step 305 is to admit resource request, PD-FE sends the initializing resource request message by the Rw interface of expansion to PE-FE, requires PE-FE that decision-making is installed; The address information that comprises charge system in this initializing resource request message;
The Rw interface of the present invention's expansion is compared with existing Rw interface, has increased by two fields (being respectively OFCS address and OCS address), can be come policy selection is done in the selection of charge system by RACF by the expansion to the Rw interface, is issued to PE-FE.
307a, PE-FE install or carry out final decision, use the charge system of SCF or PD-FE appointment to begin to charge;
307b, PE-FE return the initializing resource response message to PD-FE;
308, PD-FE sends initializing resource to SCF and replys (Resource Initiation Response) message.
Fig. 4 be the embodiment of the invention charge system when unusual SCF/PD-FE reselect the method flow diagram of charge system address, comprise the steps:
401, charge system takes place when unusual, and PE-FE triggers the change in resources request;
402, unusual indication information takes place and unusual charge system address takes place by sending change in resources request (Resource ModificationRequest) message to PD-FE and carry charge system in this message in PE-FE, and a charge system address is reselected in request;
403, PD-FE checks the charge system address that the generation that comprises in this message is unusual after receiving the change in resources request message of PE-FE transmission:
If the unusual charge system address of this generation is before to be specified by PD-FE, then unusual charge system address takes place according to this in PD-FE, reselect a same type new charge system address of (referring to be all OCS or OFCS), this charge system address packet is contained in change in resources replys in (ResourceModification Response) message and send to PE-FE, this flow process finishes;
Otherwise, this change in resources request message is transmitted to the charge system address that SCF please look for novelty.
404, after SCF receives the change in resources request message,, select the new charge system of a same type again according to the charge system type that makes a mistake;
405, SCF returns the change in resources response message to PD-FE, comprises the SCF address of selected new charge system again in this response message;
406, PD-FE carries out the verification of new charge system address and selection (concrete verification and selection strategy as step 305 as described in) according to local policy, verification and select to finish after new charge system address packet be contained in the change in resources response message be issued to PE-FE.
After receiving the new charge system address that PD-FE issues, PE-FE adopts new charge system to begin to charge.
Fig. 5 is that the embodiment of the invention adopts the method flow diagram of selecting/issue the charge system address when drawing the charging of (PULL) pattern in NGN, comprises the steps:
501, CPE is a QoS resource that given traffic request is required by sending qos signaling to PE-FE, and PE-FE triggers resource decision request (Resource DecisionRequest is called for short RDR) after receiving this qos signaling;
502, PE-FE sends resource decision request message by the Rw interface to PD-FE and carries out strategic decision-making with request; Comprise in this resource decision request message: this professional Media Stream descriptor and relevant qos parameter; PE-FE needs (particularly under the situation that the qos signaling meeting is periodically updated) to filter the QoS request message of repetition or malice;
503, PD-FE sends resource behavior request (Resource Action Request) message to obtain the business information of Media Stream to SCF after receiving resource decision request message; SCF is this service selection charge system, and the business information of selected charge system (OCS or OFCS) address and Media Stream is included in the resource behavior replys in (Resource Action Response) message and send to PE-FE;
504, PD-FE carries out strategic decision-making and mandate to the QoS resource of this request: check the Media Stream descriptor that this is professional, whether the QoS resource of request is consistent with network strategy rule and the transmission CAMEL-Subscription-Information among the NACF of PD-FE with business information, if unanimity then carry out next step;
505, PD-FE and TRC-FE carry out the access network and the core network of QoS resources effective inspection: PD-FE identification and this Media Stream of decision participation alternately; Whether PD-FE sends the initializing resource request message to one of them TRC-FE that is registered on this PD-FE, effective with the QoS resource of checking request; If there are a plurality of TRC-FE examples to be present in the network of participation, whether these TRC-FE can carry out effective with the QoS resource of checking request alternately, return the initializing resource response message to PD-FE by the TRC-FE that receives the initializing resource request message then;
506, PD-FE makes final admittance decision-making based on the decision-making and the interaction results of step 504 and 505:
If the result of decision is not admit resource request, PD-FE sends the initializing resource response message that excludes resource request to SCF, comprises Reason For Denial in this message, and this flow process finishes;
If the result of decision is to admit resource request, PD-FE carries out the verification and the selection of charge system address, and verification and selection result are included in the resource decision response message of follow-up transmission and send to PE-FE, concrete verification and selection strategy are as described in the step 305.
507, if the result of decision in the step 506 is to admit resource request, PD-FE to send resource decision response message to PE-FE, PE-FE will begin to install final admittance decision-making; The address information that also comprises charge system in this resource decision response message; After receiving the new charge system address that PD-FE issues, PE-FE adopts new charge system to begin to charge, and sends qos signaling to CPF.
Claims (9)
1. select the method for charge system in the next generation network, it is characterized in that, when adopting push-model to charge, comprising:
After business control function body is the service selection charge system, the address packet of described charge system is contained in the initializing resource request message sends to policy deciding functional entity;
After receiving the initializing resource request message that business control function body sends, policy deciding functional entity carries out strategic decision-making and mandate, resource availability inspection to described professional institute requested service quality resource, and carries out final admittance decision-making;
After final admittance decision-making was finished, policy deciding functional entity was checked the charge system address that is included in the described initializing resource request message;
If check result shows that by the selected charge system of business control function body be charge system available in the present networks, then described charge system address is sent to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
2. the method for claim 1 is characterized in that,
If the charge system Type-Inconsistencies that has disposed in charge system that business control function body is selected and the policy deciding functional entity, then policy deciding functional entity is reselected a new charge system that has disposed, and the address of selected charge system sent to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
3. method as claimed in claim 1 or 2 is characterized in that,
Policy deciding functional entity is contained in described charge system address packet in the initializing resource request message and sends to policy execution functional entity.
4. select the method for charge system in the next generation network, it is characterized in that, when adopting pull-mode to charge, comprising:
After receiving the resource decision request message of the business that policy execution functional entity sends, policy deciding functional entity sends resource behavior request message to business control function body;
Business control function body is described service selection charge system, and selected charge system address packet is contained in the resource behavior response message sends to policy deciding functional entity;
After receiving the resource behavior response message that business control function body sends, policy deciding functional entity carries out strategic decision-making and mandate, resource availability inspection to described professional institute requested service quality resource, and carries out final admittance decision-making;
After final admittance decision-making was finished, policy deciding functional entity was checked the charge system address that is included in the described resource behavior response message;
If check result shows that by the selected charge system of business control function body be charge system available in the present networks, then described charge system address is sent to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
5. method as claimed in claim 4 is characterized in that,
If the charge system Type-Inconsistencies that has disposed in charge system that business control function body is selected and the policy deciding functional entity, then policy deciding functional entity is reselected a new charge system that has disposed, and the address of selected charge system sent to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
6. as claim 4 or 5 described methods, it is characterized in that,
Policy deciding functional entity is contained in described charge system address packet in the resource decision response message and sends to policy execution functional entity.
7. select the method for charge system in the next generation network, it is characterized in that, comprising when unusual appears in the charge system of current use:
Unusual charge system address takes place by sending the change in resources request message to policy deciding functional entity and carrying in policy execution functional entity in described message, a charge system address is reselected in request;
Policy deciding functional entity is checked the address of the unusual charge system of described generation, if it is before selected by policy deciding functional entity that check result shows described charge system, then policy deciding functional entity is reselected a charge system that type is identical, and the address packet of selected charge system is contained in the change in resources response message sends to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation;
The type of described charge system comprises Online Charging System and off-line accounting system.
8. method as claimed in claim 7 is characterized in that,
If it is before selected by business control function body that the result that policy deciding functional entity is checked the address of the unusual charge system of described generation shows described charge system, then policy deciding functional entity is transmitted to business control function body with described change in resources request message;
Business control function body is reselected the charge system of a same type according to the address of the unusual charge system of described generation, and the address of selected charge system is sent to policy deciding functional entity by the change in resources response message;
Policy deciding functional entity is checked the charge system address in the change in resources response message that is included in the business control function body transmission, if check result shows that by the selected again charge system of business control function body be charge system available in the present networks, then described charge system address packet is contained in the change in resources response message and sends to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
9. method as claimed in claim 8 is characterized in that,
If the charge system Type-Inconsistencies that has disposed in charge system that business control function body is selected again and the policy deciding functional entity, then policy deciding functional entity is reselected a new charge system that has disposed, and the address packet of selected charge system is contained in the change in resources response message sends to policy execution functional entity, notification strategy is carried out functional entity and is used the charge system of described address correspondence to carry out billing operation.
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| CN1976291A (en) * | 2006-12-13 | 2007-06-06 | 中兴通讯股份有限公司 | Method for gateway GPRS support node payment metering method based on swith-on |
| CN101159568A (en) * | 2007-10-18 | 2008-04-09 | 中兴通讯股份有限公司 | QoS strategy based fee-counting method |
| CN101179402A (en) * | 2006-11-07 | 2008-05-14 | 中国电信股份有限公司 | Method of selecting flexibly service on-line accounting system for WCDMA service |
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| US6845389B1 (en) * | 2000-05-12 | 2005-01-18 | Nortel Networks Limited | System and method for broadband multi-user communication sessions |
| CN101179402A (en) * | 2006-11-07 | 2008-05-14 | 中国电信股份有限公司 | Method of selecting flexibly service on-line accounting system for WCDMA service |
| CN1976291A (en) * | 2006-12-13 | 2007-06-06 | 中兴通讯股份有限公司 | Method for gateway GPRS support node payment metering method based on swith-on |
| CN101159568A (en) * | 2007-10-18 | 2008-04-09 | 中兴通讯股份有限公司 | QoS strategy based fee-counting method |
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