CN101610529B

CN101610529B - Strategy control system and strategy control method in communication system

Info

Publication number: CN101610529B
Application number: CN2009101501779A
Authority: CN
Inventors: 吴中华
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2009-07-16
Filing date: 2009-07-16
Publication date: 2012-01-11
Anticipated expiration: 2029-07-16
Also published as: CN101610529A; WO2011006414A1

Abstract

The invention discloses a strategy control method in a communication system and a strategy control system. The strategy control method comprises the following steps: a strategy control center generates keep-alive strategies; the keep-alive strategies are distributed to network elements; the network elements check keep-alive main bodies in the keep-alive strategies; and when the keep-alive main bodies are self bodies, the network elements perform the keep-alive strategies, or when the keep-alive main bodies are non-self bodies, the network elements transmit the keep-alive strategies to the keep-alive main bodies, and perform the keep-alive strategies. The strategy control system comprises the strategy control center used for generating and distributing the keep-alive strategies and the network elements are connected with the strategy control center and used for receiving and checking the keep-alive main bodies, when the keep-alive main bodies are self bodies, the network elements perform the keep-alive strategies, or when the keep-alive main bodies are non-self bodies, the network elements transmit the keep-alive strategies to the keep-alive main bodies. Therefore, the invention also relates to a system comprising a strategy and charging regulation function entity, a strategy and charging performance function entity and a strategy and charging application function entity. The invention solves the problem of inconformity due to the distribution and the customizing of the keep-alive strategies in the prior art.

Description

Policy control method in policy controlling system and the communication system

Technical field

The present invention relates to communication technical field, more specifically, relate to the policy control method and the system of a kind of implementation strategy control centre unified management keep-alive strategies.

Background technology

At present; Third generation partner program (3rd Generation Partnership Project; Abbreviate 3GPP as) and 3GPP2 defined a kind of various Internet protocols (Internet Protocol that is applicable to; Abbreviate IP as) policy control and charging controlled function framework---policy control and charging (the Policy Control and Charging of connection access network network; Abbreviate PCC as) framework; PCC is used to accomplish resource and admission and controls, and the characteristic that is primarily aimed at mobile access network realizes certain service quality control and charging policy control, and the major function that PCC provides comprises: control based on the control of customization information of user implementation strategy and based on the charging of server data stream.PCC is between service control layer and Access Layer, perhaps between service control layer and bearing bed, to the concrete technology and the topology information of service control layer shielding Access Layer or bearing bed.PCC receives and professional relevant service quality (Quality of Sevice from service control layer; Abbreviate QoS as) authorization parameter; Then topology information of QoS authorization parameter and admission control scheme, network etc. is combined; And the QoS authorization parameter relevant with business be converted into the IP qos parameter; Then the IP qos parameter that transforms is offered relevant Access Layer or bearing bed node and Service Gateway node, these nodes are realized corresponding QoS control according to IP qos parameter information that receives and the function of self.Wherein, policy control mainly is meant gate (Gating Control) and QoS control (QoS Control), and the control of chargeing is meant the charging (Flow Based Charging abbreviates FBC as) based on stream.

Fig. 1 is the Organization Chart based on the realization PCC basic function of 3GPP/3GPP2 standard according to existing correlation technique, and is as shown in Figure 1, comprises following functional entity:

Application Function (Application Function; Abbreviate AF as) provide the functional entity of application; These application needs carry out dynamic strategy/charging control to user plane; For "Policy and Charging Rules Function entity (Policy and Charging Rule Function abbreviates PCRF as) provides dynamic utility cession information.

CAMEL-Subscription-Information memory function entity (Subscription Profile Repository; Abbreviate SPR as); Be used to store user's CAMEL-Subscription-Information; Wherein, user's CAMEL-Subscription-Information generally comprises a plurality of business information that the user contracts, and each business information comprises and should be service quality that this user provides and the charging method that is adopted.

PCRF comprise the policy control decision entity and based on stream charging controlled function entity.PCRF to strategy and charging execution function entity (Policy and Charging Enforcement Function abbreviates PCEF as) carry out based on business data flow detection, gate, QoS mandate and based on the network control of flow based charging.PCRF communicates through Rx interface and AF entity, communicates through Sp interface and SPR entity, communicates through Gx interface and PCEF.The user signing contract information whether business information that PCRF inspection AF entity provides obtains with the predefined policing rule of operator and from the SPR entity is consistent; Under the two consistent situation; The business information that provides according to the AF entity generates corresponding rule, and it is handed down to PCEF.PCRF also will carry out QoS to the business information that AF provides and authorize.

The PCEF entity; Be used for qos policy execution, server data stream detection, carry out charging and gate control function based on stream; Its function can be integrated in the gateway (GW); Server data stream detects and is meant that PCEF detects server data stream according to the service data flow template in the PCC rule (PCC Rule) that activates, so that whether the recognition data bag belongs to a server data stream.Carry out qos policy and be meant that PCEF carries out the QoS control of authorizing according to the PCC rule that activates to a server data stream; Execution is meant that based on the charging of stream PCEF charges to the server data stream of passing through according to charging policy in the PCC rule and charging key (Charging Key); PCEF requires to carry out the collection of charge information and report according to the charging of PCC rule, carries out gate and is meant that PCEF only allows server data stream when gate is opened, to pass through.

Online Charging System (Online Charging System abbreviates OCS as) is used for the online charging of application layer, and communicates through Gy interface and PCEF, and PCEF is to OCS request pre-payment quota, when PCEF generates ticket to the OCS real-time report.

Off-line accounting system (Offline Charging System abbreviates OFCS as) is used for the offline charging of application layer, and OFCS adopts the mode of offline charging, and communicates through Gz interface and PCEF, regularly reports to OFCS behind the PCEF generation ticket.

3GPP PCC framework comes policy control that PCEF (generally being arranged in GGSN) is concentrated through introducing PCRF; PCEF is before carrying out the business transmission; Will be to the relevant business game of PCRF request, after authorizing and assign strategy through PCRF, the transmission that PCEF can activating service stream.

Dissimilar business data flows has different transmission characteristics; For example professional for voice class or video class; The transmission of packet generally is continuous, and the centre is separated continuously or blanking time is shorter, and for common online class data service; The transmission of packet often is off and on, and business carries out existing in the process long period sheet free of data bag to transmit.

Therefore; Keep-alive detection strategy to different kinds of business stream should be different, to voice and video class Business Stream, when in a relatively short time, not having the transmission of data flow; Just can think that Business Stream lost efficacy; To common data service, when in a relatively long time, not having the transmission of data flow, can not think that all Business Stream lost efficacy.

3GPP PCC framework does not stipulate that this keep-alive that how to realize Business Stream detects, but this function is of practical significance, and Business Stream is carried out keep-alive detect, and when finding that Business Stream lost efficacy, can discharge related resource.The function of Business Stream being carried out the keep-alive detection is realized by PCEF (GGSN) traditionally; As previously mentioned; Keep-alive detection to Business Stream can have multiple strategy; In this respect at present not which standard it is unified regulation and management, therefore possibly cause between the PCEF of different vendor even between the different PCEF of same manufacturer, detect strategy adopted different keep-alives with a kind of business.

At IP multimedia system (IP Multimedia Subsystem; Abbreviate IMS as) in the network; When initiating a new calling, terminal, signaling plane equipment (like P-CSCF), medium face equipment (like PCEF) and bearing control equipment (like PCRF) etc. all will be new call distribution resource (like memory headroom, scheduling queue, link bandwidth etc.).When certain network equipment wherein find IMS call out occur fatal when unusual, call release related resource initiatively, and notify other network equipment to take corresponding measure.If certain network equipment is only waited for the notice of other network equipment and could be confirmed call exception and discharge related resource; The possibility that then has resource from suspending; Possibly go out active because the call exception of LA Management Room notice and resource discharge the control signaling, thereby cause failed calling still to take Internet resources.Therefore, whether each network equipment all is necessary to detect voluntarily IMS and calls out and to remain valid.

But this will bring the another one problem, if two LA Management Rooms are inconsistent to the keep-alive strategies that same IMS calls out, might cause calling out erroneous judgement to a normal IMS for losing efficacy, thus the release related resource of mistake.For example; In the IMS calling is continuing to carry out; PCRF expectation PCEF clockwise PCRF request in per 3 minutes refreshes relevant PCC rule; And PCEF be configured to per 5 minutes just request once, obviously this inconsistent meeting causes PCRF to think that IMS calls out occurring unusual and discharge related resource, finally cause the IMS call exception to be ended.And for example; The Gx interface session of same calling adopts keep-alive in per 5 minutes once, and corresponding Rx interface session is adopted keep-alive in per 1 minute once, though do not influence the carrying out of calling; But the more frequent keep-alive of Rx interface there is no need, and has reduced the efficient of the network equipment.And for example; If PCRF and PCEF adopt per 3 minutes clockwise the other side to inform that we still keep certain calling; And wait for the other side's response to confirm that the other side also keeping this calling, has adopted identical keep-alive strategies though seem PCRF and PCEF, in fact such keep-alive strategies neither be optimized; As long as because there is a side regularly to send keep-alive message and wait-for-response, and the opposing party waits for that merely the keep-alive Intra-request Concurrency goes out response and just can.

Summary of the invention

Technical problem to be solved by this invention provides policy control method and policy controlling system in a kind of communication system, call loss risk and the decrease in efficiency problem that causes to solve the inconsistent problem that keep-alive strategies dispersion customization brings in the prior art.

In order to solve the problems of the technologies described above, the invention provides the policy control method in a kind of communication system, this method may further comprise the steps:

The policy control center generates keep-alive strategies according to the information that is used to formulate keep-alive strategies;

The said keep-alive strategies that said policy control center will generate is distributed to corresponding network element;

Said network element receives said keep-alive strategies, and checks the keep-alive main body in the said keep-alive strategies;

When said keep-alive main body was said network element itself, then said network element was carried out said keep-alive strategies; Perhaps

When said keep-alive main body is not during for said network element itself, then said network element passes to said keep-alive main body with said keep-alive strategies, and said keep-alive main body is carried out said keep-alive strategies.

The said information that is used to formulate keep-alive strategies comprises: business information, user accessing information, user signing contract information, accept the strategy that is provided with in advance of link information, network load condition or operator.

Said keep-alive strategies comprises: the strategy names that is used for a keep-alive strategies of unique identification; Keep-alive main body as said keep-alive strategies implementer; As said keep-alive strategies by implementer's keep-alive object; Set up the keep-alive object that connects between said keep-alive main body and the said keep-alive object; Said keep-alive main body is understood said keep-alive object and oneself is still safeguarded the keepalive method of keep-alive object; Said keep-alive main body is confirmed the measuring method for activity whether said keep-alive object continues to survive; With said keep-alive subject detection to the said keep-alive object inactivation processing method behind the inactivation.

The said keep-alive strategies of said execution comprises: said keep-alive main body is regularly sent and the relevant keep-alive message of said keep-alive object to said keep-alive object according to the keepalive method in the said keep-alive strategies; Perhaps according to the keepalive method in the said keep-alive strategies, said keep-alive object sends the keep-alive request message to said keep-alive main body.

The said keep-alive strategies of said execution comprises: said keep-alive main body is regularly sent the survey relevant with said keep-alive object message alive to said keep-alive object according to the measuring method for activity in the said keep-alive strategies; Perhaps according to the measuring method for activity in the said keep-alive strategies, said keep-alive main body waits for that said keep-alive object notifies said keep-alive object inactivation.

Said policy control center is distributed to corresponding network element with said keep-alive strategies and is specially: said network element sends strategy request message or authorization request message to said policy control center, and distribute said keep-alive strategies according to said strategy request message at said policy control center.

Said policy control center is distributed to corresponding network element with said keep-alive strategies and is specially: said policy control center initiatively is distributed to corresponding network element with said keep-alive strategies.

Policy control method in the described communication system also comprises: after said keep-alive main body was carried out said keep-alive strategies failure, said keep-alive main body was returned the report of carrying out said keep-alive strategies failure to said policy control center.

Policy control method in the described communication system also comprises: when generating said keep-alive strategies, said "Policy and Charging Rules Function entity also generates the keep-alive strategies of itself, and carries out said itself keep-alive strategies.

The present invention also provides a kind of policy controlling system, and this system comprises:

The policy control center is used for generating keep-alive strategies according to the information that is used to formulate keep-alive strategies; And with said keep-alive strategies distribution;

Network element is connected with said policy control center, is used to receive said keep-alive strategies, and checks the keep-alive main body in the said keep-alive strategies; When said keep-alive main body was said network element itself, then said network element was carried out said keep-alive strategies; Perhaps when said keep-alive main body be not during for said network element itself, then said network element passes to said keep-alive main body with said keep-alive strategies, and said keep-alive main body is carried out said keep-alive strategies.

Said policy control center comprises:

Acquisition module is used to obtain the business information of calling, user accessing information, user signing contract information, bearing link information, network load information, and the rule and policy of policy control center self configuration;

The policy development module is connected with said first acquisition module, and the information that is used for obtaining according to said first acquisition module is formulated keep-alive strategies; With

The strategy sending module is connected with said policy development module, is used for sending the keep-alive strategies that the policy development module is formulated to adjacent network element.

Said policy control center also comprises:

Keep-alive module is connected with said policy development module, is used for according to the keep-alive strategies of formulating, the keepalive method at the said policy control center of implementing to stipulate in the said keep-alive strategies;

Survey flexible module, be connected, be used for, the measuring method for activity at the said policy control center of stipulating in the enforcement keep-alive strategies according to the keep-alive strategies of formulating with said policy development module; With

The inactivation processing module is surveyed flexible module with said policy development module and first and is connected, the keep-alive strategies that is used to formulate, the inactivation processing method at the said policy control center of stipulating in the enforcement keep-alive strategies.

Said network element comprises:

Reporting modules is used for reporting the information that is used to formulate keep-alive strategies to said policy control center;

Receiver module is used for the reception keep-alive strategies from said policy control center;

Keep-alive module is connected with said receiver module, is used for according to the keep-alive strategies that receives the keepalive method of the said network element of stipulating in the enforcement keep-alive strategies;

Survey flexible module, be connected, be used for, the measuring method for activity of the said network element of stipulating in the enforcement keep-alive strategies according to the keep-alive strategies that receives with said receiver module;

The inactivation processing module is connected with the survey flexible module with said receiver module, is used for according to the keep-alive strategies that receives the inactivation processing method of the said network element of stipulating in the enforcement keep-alive strategies.

Transmit module, be connected with said receiver module, being used for the keep-alive main body that receiver module receives is not that keep-alive strategies own is delivered to corresponding keep-alive main body.

The "Policy and Charging Rules Function entity is used for generating keep-alive strategies according to the information that is used to formulate keep-alive strategies; And with said keep-alive strategies distribution;

Strategy and charging execution function entity pass through the Gx interface communication with said "Policy and Charging Rules Function entity, are used to receive said keep-alive strategies, and check the keep-alive main body in the said keep-alive strategies; When said keep-alive main body is itself, then carry out said keep-alive strategies; Perhaps when said keep-alive main body be not during for itself, then said keep-alive strategies is passed to said keep-alive main body, and said keep-alive main body is carried out said keep-alive strategies; With

Application Function is communicated by letter through Rx interface with said "Policy and Charging Rules Function entity, is used to receive said keep-alive strategies, and checks the keep-alive main body in the said keep-alive strategies; When said keep-alive main body is itself, then carry out said keep-alive strategies; Perhaps when said keep-alive main body be not during for itself, then unit passes to said keep-alive main body with said keep-alive strategies, and said keep-alive main body is carried out said keep-alive strategies.

Said "Policy and Charging Rules Function entity comprises:

First acquisition module is used to obtain the business information of calling, user accessing information, user signing contract information, bearing link information, network load information, and the rule and policy of "Policy and Charging Rules Function entity self configuration;

Said "Policy and Charging Rules Function entity also comprises:

First keep-alive module is connected with said policy development module, is used for according to the keep-alive strategies of formulating, the keepalive method of the said "Policy and Charging Rules Function entity of implementing to stipulate in the said keep-alive strategies;

First surveys flexible module, is connected with said policy development module, is used for according to the keep-alive strategies of formulating the measuring method for activity of the said "Policy and Charging Rules Function entity of stipulating in the enforcement keep-alive strategies; With

The first inactivation processing module is surveyed flexible module with said policy development module and first and is connected, the keep-alive strategies that is used to formulate, the inactivation processing method of the said "Policy and Charging Rules Function entity of stipulating in the enforcement keep-alive strategies.

Said strategy and charging execution function entity comprise respectively:

First reporting modules is used for to said "Policy and Charging Rules Function entity report information;

First receiver module is used for receiving keep-alive strategies from said "Policy and Charging Rules Function entity;

Second keep-alive module is connected with said receiver module, is used for according to the keep-alive strategies that receives the strategy of stipulating in the enforcement keep-alive strategies and the keepalive method of charging execution function entity;

Second surveys flexible module, is connected with said receiver module, is used for according to the keep-alive strategies that receives the strategy of stipulating in the enforcement keep-alive strategies and the measuring method for activity of charging execution function entity;

The second inactivation processing module is surveyed flexible module with said receiver module and second and is connected, and is used for according to the keep-alive strategies that receives the strategy of stipulating in the enforcement keep-alive strategies and the inactivation processing method of charging execution function entity; With

First transmits module, is connected with said first receiver module, and being used for the keep-alive main body that first receiver module receives is not that keep-alive strategies own is delivered to corresponding keep-alive main body.

Said Application Function comprises:

Second reporting modules is used for to said "Policy and Charging Rules Function entity report information;

Second receiver module is used for receiving keep-alive strategies from said "Policy and Charging Rules Function entity;

The 3rd keep-alive module is connected with said second receiver module, is used for according to the keep-alive strategies that receives the keepalive method of the Application Function of stipulating in the enforcement keep-alive strategies;

The 3rd surveys flexible module, is connected with said second receiver module, is used for according to the keep-alive strategies that receives the measuring method for activity of the Application Function of stipulating in the enforcement keep-alive strategies;

The 3rd inactivation processing module is surveyed flexible module with said second receiver module and the 3rd and is connected, and is used for according to the keep-alive strategies that receives the inactivation processing method of the Application Function of stipulating in the enforcement keep-alive strategies; With

Second transmits module, is connected with said second receiver module, and being used for the keep-alive main body that second receiver module receives is not that keep-alive strategies own is delivered to corresponding keep-alive main body.

Therefore; Policy control method and policy controlling system in the communication system of the present invention; Through policy control center (like PCRF) the unified keep-alive strategies of formulating; By policy control center (like PCRF) centralized management and distribution keep-alive strategies, avoided the inconsistent problem that keep-alive strategies disperses customization to bring in the prior art, and this because the inconsistent call loss risk that causes of keep-alive strategies and the problem of decrease in efficiency; And keep-alive strategies is concentrated by after policy control center (like PCRF) generation and the distribution, and it is easy that the modification of keep-alive strategies also becomes.

Description of drawings

Fig. 1 is for having the configuration diagram based on the realization PCC basic function of 3GPP/3GPP2 standard now;

Fig. 2 is the structured flowchart of policy controlling system of the present invention;

Fig. 3 is applied in the policy controlling system example structure sketch map in the IP multimedia system for policy controlling system of the present invention;

Fig. 4 is the flow chart of policy control method in the communication system of the present invention;

Fig. 5 is the reach the standard grade interacting message signaling process figure of flow process of policy control method embodiment 1 user in the communication system of the present invention;

Fig. 6 is the interacting message signaling process figure of policy control method embodiment 2VoIP service call flow process in the communication system of the present invention;

Fig. 7 triggers the interacting message signaling process figure that revises the professional keep-alive strategies of VoIP for policy control method embodiment 3 webmasters in the communication system of the present invention.

Embodiment

Through accompanying drawing and embodiment, the technical scheme of the embodiment of the invention is done further detailed description below.

The invention provides policy control method and system in a kind of communication system,, avoid producing call loss risk and decrease in efficiency through generating by the policy controlling system unification and issuing keep-alive strategies.In the present invention, keep-alive strategies is made up of following:

Strategy names: be used for keep-alive strategies of unique identification;

The keep-alive main body: the keep-alive main body is the enforcement side of keep-alive strategies, generally is certain network equipment, and for example PCRF can uniquely confirm a keep-alive main body through " type+sign ";

The keep-alive object: the keep-alive object is the quilt enforcement side of keep-alive strategies, generally is certain network equipment, and for example PCEF can uniquely confirm a keep-alive object through " type+sign ".Keep-alive main body and keep-alive object are relative, and for example PCRF can be as the keep-alive main body in certain keep-alive strategies, in another keep-alive strategies as the keep-alive object.

The keep-alive object: object of protection is that between protection main body and keep-alive object is related; Can there be a plurality of keep-alive objects to need keep-alive between keep-alive main body and keep-alive object; For example can set up a Gx interface IPCAN (web cam) session for each UE inserts between PCRF and the PCEF; Can set up a plurality of carryings again in each IPCAN session, have on each carries and to implement a plurality of PCC rules.The keep-alive object can be link, session, carrying, Media Stream etc., and the keep-alive object is screened through certain sign and method, for example link number, session identification, Media Stream grader etc.Can uniquely confirm a keep-alive object through " type+sign ";

Keepalive method: keepalive method is that the keep-alive main body is known the keep-alive object oneself still to safeguard the method for certain object of protection.Keepalive method is divided into two types:

1, keepalive method initiatively: the characteristic of these class methods be the keep-alive main body want initiatively and the keep-alive object mutual; The other side is known oneself still safeguard certain keep-alive object; For example keep-alive main body is initiatively sent the keep-alive message relevant with object of protection to the keep-alive object; The keep-alive main body can regularly be sent this keep-alive message; Also can need send the back and regularly send this keep-alive message there not being other service message, receive in a period of time when the keep-alive object and just think after the keep-alive main body is about the service message of certain keep-alive object or keep-alive message that the keep-alive main body still safeguarding certain keep-alive object.

2, passive keepalive method: the characteristic of these class methods is that the keep-alive main body is passive mutual with the keep-alive object; The keep-alive request message of for example keep-alive main body passive response keep-alive object and send the keep-alive response message just can think when after the keep-alive object is sending the keep-alive request for certain keep-alive object, receiving the keep-alive response message of keep-alive main body in a period of time that the keep-alive main body still survives.

Measuring method for activity: measuring method for activity is that the keep-alive main body is confirmed the method whether the keep-alive object continues to survive.Measuring method for activity also can be divided into two types:

1, measuring method for activity initiatively: whether it is regularly initiatively mutual with the keep-alive object that the characteristic of these class methods is that the keep-alive main body is wanted, or regularly initiatively inquire about the keep-alive Obj State to the third party, still survive to confirm the keep-alive object.

2, passive measuring method for activity: the characteristic of these class methods is that keep-alive main body passive wait keep-alive object or third party notify keep-alive object inactivation; Or the keep-alive main body find in the keep-alive object certain hour not with its alternately about the message of certain keep-alive object, then can think this keep-alive object inactivation.

The inactivation processing method: the processing method that the inactivation processing method is the keep-alive subject detection behind keep-alive object inactivation for example, discharges related resource, perhaps alarm, recording exceptional daily record etc.

The parameter that keepalive method in the keep-alive strategies and measuring method for activity need when wanting illustration method to implement; For example; When adopting the active keepalive method that regularly sends keep-alive message; The time cycle that keep-alive message is sent is described, adopts when regularly detecting the keep-alive object and whether mutual passive measuring method for activity being arranged, sense cycle is described with the keep-alive main body.

Introduce the policy controlling system that keep-alive strategies of the present invention is managed concentratedly below in detail.Policy controlling system comprises policy control center 1 and network element 2 in this communication system.

Be illustrated in figure 2 as the structured flowchart of policy controlling system of the present invention, this policy controlling system comprises policy control center 1, is used for generating keep-alive strategies according to the information that is used to formulate keep-alive strategies; And with said keep-alive strategies distribution; With network element 2, be connected with said policy control center 1, be used to receive said keep-alive strategies, and check the keep-alive main body in the said keep-alive strategies; When said keep-alive main body was said network element itself, then said network element was carried out said keep-alive strategies; Perhaps when said keep-alive main body be not during for said network element itself, then said network element passes to said keep-alive main body with said keep-alive strategies, and said keep-alive main body is carried out said keep-alive strategies.

Said policy control center comprises:

Acquisition module 101 is used to obtain the business information of calling, user accessing information, user signing contract information, bearing link information, network load information, and the rule and policy of PCRF self configuration;

Policy development module 102 is connected with said acquisition module 101, and the information that is used for obtaining according to said acquisition module is formulated keep-alive strategies; With

Strategy sending module 103 is connected with said policy development module 102, is used for sending the keep-alive strategies that the policy development module is formulated to adjacent network element.

As shown in the figure, said policy control center 1 also comprises:

Keep-alive module 104 is connected with said policy development module 102, is used for implementing the keepalive method of stipulating in the said keep-alive strategies according to the keep-alive strategies of formulating;

Survey flexible module 105, be connected, be used for implementing the measuring method for activity of stipulating in the keep-alive strategies according to the keep-alive strategies of formulating with said policy development module 102; With

Inactivation processing module 106 is connected with survey flexible module 105 with said policy development module 102, and the keep-alive strategies that is used to formulate is implemented the inactivation processing method of stipulating in the keep-alive strategies.

Said network element 2 comprises:

Reporting modules 201 is used for reporting the information that is used to formulate keep-alive strategies to said policy control center;

Receiver module 202 is used for the reception keep-alive strategies from said policy control center;

Network element keep-alive module 203 is connected with said receiver module 202, is used for according to the keep-alive strategies that receives the keepalive method of the said network element of stipulating in the enforcement keep-alive strategies;

Network element is surveyed flexible module 204, is connected with said receiver module 202, is used for according to the keep-alive strategies that receives the measuring method for activity of the said network element of stipulating in the enforcement keep-alive strategies;

Network element inactivation processing module 205 is connected with survey flexible module 204 with said receiver module 202, is used for according to the keep-alive strategies that receives the inactivation processing method of the said network element of stipulating in the enforcement keep-alive strategies.

Transmit module 206, be connected with said receiver module 202, being used for the keep-alive main body that receiver module receives is not that keep-alive strategies own is delivered to corresponding keep-alive main body.

Policy controlling system according to the present invention is applied in the IP multimedia system, and in order to realize the centralized management of keep-alive strategies, for this reason, the embodiment of the invention expands existing P CC framework.In the PCC framework after expansion (that is, above-mentioned policy controlling system), following entity and interface are strengthened: PCRF can construct keep-alive strategies; Rx, Gx, Gxx interface can transmit keep-alive strategies; AF, PCRF, PCEF can carry out keep-alive strategies.This policy controlling system comprises AF, PCRF, PCEF, and PCRF and PCEF communicate through the Gx interface, and PCRF and AF communicate through Rx interface.The PCC framework of facing the expansion of the embodiment of the invention down is described in detail.

As shown in Figure 3, for policy controlling system of the present invention is applied in the policy controlling system embodiment in the IP multimedia system, the structural representation of the PCC framework that promptly expands.

In this policy controlling system, the keep-alive strategies that PCRF formulates and distributes each network element, other network element such as AF, PCEF, UE etc. receive or transmit keep-alive strategies, and each network element is carried out PCRF and is assigned the keep-alive strategies to oneself.As shown in the figure, this control system comprises:

"Policy and Charging Rules Function entity (PCRF) 10 is used for generating keep-alive strategies according to the information that is used to formulate keep-alive strategies; And with said keep-alive strategies distribution;

Strategy and charging execution function entity 20 pass through the Gx interface communication with said "Policy and Charging Rules Function entity 10, are used to receive said keep-alive strategies, and check the keep-alive main body in the said keep-alive strategies; When said keep-alive main body was said network element itself, then said network element was carried out said keep-alive strategies; Perhaps when said keep-alive main body be not during for said network element itself, then said network element passes to said keep-alive main body with said keep-alive strategies, and said keep-alive main body is carried out said keep-alive strategies; With

Application Function 30 is communicated by letter through Rx interface with said "Policy and Charging Rules Function entity 10, is used to receive said keep-alive strategies, and checks the keep-alive main body in the said keep-alive strategies; When said keep-alive main body is itself, then carry out said keep-alive strategies; Perhaps when said keep-alive main body be not during for itself, then said keep-alive strategies is passed to said keep-alive main body, and said keep-alive main body is carried out said keep-alive strategies.

Said PCRF 10 comprises:

First acquisition module 11 is used to obtain the business information of calling, user accessing information, user signing contract information, bearing link information, network load information, and the rule and policy of PCRF self configuration these be used to formulate the information of keep-alive strategies;

Policy development module 12 is connected with said first acquisition module, and the information that is used for obtaining according to said first acquisition module is formulated keep-alive strategies; With

Strategy sending module 13 is connected with said policy development module, is used for sending the keep-alive strategies that the policy development module is formulated to adjacent network element.

Continuation is referring to Fig. 3, and said PCRF 10 also comprises:

First keep-alive module 14 is connected with said policy development module, is used for according to the keep-alive strategies of formulating, the keepalive method of the said "Policy and Charging Rules Function entity of implementing to stipulate in the said keep-alive strategies;

First surveys flexible module 15, is connected with said policy development module, is used for according to the keep-alive strategies of formulating the measuring method for activity of the said "Policy and Charging Rules Function entity of stipulating in the enforcement keep-alive strategies; With

The first inactivation processing module 16 is surveyed flexible module with said policy development module and first and is connected, the keep-alive strategies that is used to formulate, the inactivation processing method of the said "Policy and Charging Rules Function entity of stipulating in the enforcement keep-alive strategies.

Said PCEF20 comprises:

First reporting modules 21 is used for to said "Policy and Charging Rules Function entity 10 report informations;

First receiver module 22 is used for receiving keep-alive strategies from said "Policy and Charging Rules Function entity 10;

Second keep-alive module 23 is connected with said receiver module 22, is used for according to the keep-alive strategies that receives the strategy of stipulating in the enforcement keep-alive strategies and the keepalive method of charging execution function entity;

Second surveys flexible module 24, is connected with said receiver module 22, is used for according to the keep-alive strategies that receives the strategy of stipulating in the enforcement keep-alive strategies and the measuring method for activity of charging execution function entity;

The second inactivation processing module 25 is surveyed flexible module 24 with said first receiver module 22 and second and is connected, and is used for according to the keep-alive strategies that receives the strategy of stipulating in the enforcement keep-alive strategies and the inactivation processing method of charging execution function entity.

First transmits module 26, is connected with said first receiver module 22, and the keep-alive strategies that is used for keep-alive main body with the reception of first receiver module and is not self is delivered to corresponding keep-alive main body.

Said AF30 comprises:

Second reporting modules 31 is used for to said "Policy and Charging Rules Function entity 10 report informations;

Second receiver module 32 is used for receiving keep-alive strategies from said "Policy and Charging Rules Function entity 10;

The 3rd keep-alive module 33 is connected with said receiver module 32, is used for according to the keep-alive strategies that receives the keepalive method of the Application Function of stipulating in the enforcement keep-alive strategies;

The 3rd surveys flexible module 34, is connected with said second receiver module 32, is used for according to the keep-alive strategies that receives the measuring method for activity of the Application Function of stipulating in the enforcement keep-alive strategies;

The 3rd inactivation processing module 35 is surveyed flexible module 34 with said second receiver module 32 and the 3rd and is connected, and is used for according to the keep-alive strategies that receives the inactivation processing method of the Application Function of stipulating in the enforcement keep-alive strategies.

Second transmits module 36, is connected with said second receiver module 32, and the keep-alive strategies that is used for keep-alive main body with the reception of second receiver module and is not self is delivered to corresponding keep-alive main body.

PCRF goes out various keep-alive strategies according to facility information, user profile, business information, network load condition and the specific integrated decision-makings such as strategy of utilization merchant, is distributed to corresponding keep-alive object.Promptly when PCRF and adjacent network element link setup, PCRF can be to the keep-alive strategies of adjacent network element distribution networks unit's level and link level.For example, transmit the keep-alive strategies of Rx interface when PCRF and P-CSCF link setup to it, when PCRF and PCEF link setup to the keep-alive strategies of its transmission Gx interface.Correspondingly; The embodiment of the invention expands the Gx interface and the Rx interface of PCC framework, makes PCRF to send the keep-alive strategies that has comprised keep-alive main body, keep-alive object, keep-alive object, keepalive method, measuring method for activity, inactivation processing method to PCEF and AF.

Transmission module through network element (for example second among the PCEF transmits module), PCRF not only can formulate in abutting connection with network element with in abutting connection with the keep-alive strategies of link, further; PCRF can be through transmitting keep-alive strategies in abutting connection with network element to non-adjacent network element, and for example, PCRF formulates the keep-alive strategies of PCEF to UE; Be distributed to PCEF, simultaneously, PCRF formulates the keep-alive strategies of UE to PCEF; Pass to UE through PCEF, in this way, guaranteed the consistency of keep-alive strategies between network element.

Policy controlling system embodiment (the PCC framework of expansion) based on above-mentioned introduction describes policy control method embodiment in the communication system of the present invention below.According to embodiments of the invention; A kind of method of managing keep-alive strategies concentratedly is provided; Be applied to comprise the communication system of application entity (AF), "Policy and Charging Rules Function entity (PCRF), strategy and charging execution function entity (PCEF), this method can be implemented through above-mentioned policy controlling system.

As shown in Figure 4, the flow chart of policy control method in the communication system of the present invention.As may further comprise the steps among the figure:

Step 41, policy control center (promptly being PCRF in this example) collected call-related information, is used to formulate the information generation keep-alive strategies of keep-alive strategies according to these;

Step 42; After related network elements AF, PCEF received keep-alive strategies from PCRF, whether the keep-alive main body of inspection keep-alive strategies was itself own (step 420), if associated gateway execution keep-alive strategies (step 421) then; Otherwise; Transmit and transmit keep-alive strategies, carry out keep-alive strategies, and the installation results of keep-alive strategies is transmitted result notification with transmission give PCRF (step 422) by the keep-alive main body to corresponding keep-alive main body.

Wherein, Related network elements AF, PCEF receive keep-alive strategies from PCRF one of can be in the following manner: (1) related network elements AF, PCEF send strategy request message or authorization request message to PCRF; The policy control center issues keep-alive strategies according to strategy request message, and related network elements receives the keep-alive strategies (pull mode) that PCRF returns; (2) related network elements AF, PCEF receive the keep-alive strategies (Push mode) that PCRF initiatively issues;

When related network elements AF, PCEF transmission keep-alive strategies, can become the keep-alive parameter of external interface protocol employing separately according to the keep-alive strategies content translation, and transmit, not necessarily will be according to the format and content of PCRF keep-alive strategies originally.

Through this execution mode, PCRF can concentrate the keep-alive strategies of formulation, distribution, managing I MS network, has solved the inconsistent calling mistake damage of bringing of keep-alive strategies dispersion in the prior art, decrease in efficiency, and keep-alive strategies is adjusted problems such as difficulty.

The keep-alive strategies that PCRF assigns has precedence over the keep-alive strategies of local acquiescence; When related network elements can not be carried out the keep-alive strategies of PCRF appointment; Should report keep-alive strategies execution failure to PCRF; In the case, PCRF can adjust keep-alive strategies, perhaps allows related network elements to carry out the keep-alive strategies of local acquiescence.Promptly this method is further comprising the steps of: after network element was carried out the keep-alive strategies failure, the keep-alive main body was returned the report of carrying out said keep-alive strategies failure to said PCRF.

When new IMS calling is initiated at the terminal; AF will authorize and resource reservation for IMS calls out to the PCRF request; PCRF IMS is called out authorize with resource reservation in; Confirm the keep-alive strategies of IMS session and Media Stream wherein according to call information, and in response message, take back keep-alive strategies to AF.AF confirms how work and dimension work are surveyed in IMS session and Media Stream wherein in view of the above.

When IMS calling signaling face is consulted or afterwards, the terminal want and load bearing equipment between set up or revise medium face passage.The load bearing equipment of medium face will obtain to set up or revise the various strategies of media channel from PCRF, comprises qos policy, charging policy, keep-alive strategies etc.The load bearing equipment of medium face can obtain these strategies through dual mode; A kind of mode is that PCRF initiatively gives load bearing equipment with these policy distributions; Be called the Push mode, another kind of mode is that PCRF responds the request of load bearing equipment and gives load bearing equipment with these policy distributions, becomes the Pull mode.After load bearing equipment obtains these strategies, QoS control, charging control and keep-alive control etc. are carried out in new IMS calling and medium wherein according to tactful content.

Wherein, the call-related information that PCRF collects comprises: (1) business information: the class of service under calling out, and the media parameter that need set up, PCRF can obtain these information from AF; (2) user accessing information, user's name identification, IP address etc., PCRF can obtain these information from SPR; (3) user signing contract information: the class of service that user and operator are signatory, the grade of service etc., PCRF can obtain these information from SPR; (4) bearing link information: the loaded service grader, carry purposes, the QoS rank of carrying etc., PCRF can obtain these information from PCEF; (5) network load condition, PCRF can obtain these information from adjacent network elements such as PCEF, AF; (6) Provisioning Policy in advance of operator is stored among the PCRF.Comprehensive these information of PCRF are made the keep-alive strategies of calling.

Introduce the application of policy control control method in the IP multimedia system below in detail.

Embodiment 1

As shown in Figure 5, be the reach the standard grade interacting message signaling process figure of flow process of policy control method embodiment 1 user in the communication system of the present invention.As shown in Figure 5, this method comprises:

Step S401, UE is attached to network, and UE sends a request message, and sets up default bearing between request and PCEF;

Step S402, PCEF are that UE sends authorization request message to PCRF, ask to set up a new IPCAN session with PCRF;

Step S403, PCRF find local not this user's CAMEL-Subscription-Information, to this user's of SPR request CAMEL-Subscription-Information;

Step S404, SPR return this user's CAMEL-Subscription-Information and give PCRF;

Step S405, PCRF carries out authentication and mandate to the user, confirms qos policy, charging policy and the keep-alive strategies of default bearing, is handed down to PCEF;

Wherein the PCRF keep-alive strategies that is handed down to PCEF comprises:

1, keep-alive strategies KA_DEFAULT_BEARER_GX_PCEF; Being used for PCEF carries out keep-alive and surveys alive the PCC rule of the default bearing of Gx interface IPCAN session; Because default bearing is first carrying that the IPCAN session is set up; Also be last carrying before the IPCAN session deletion, so the keep-alive of default bearing is equal to the keep-alive to the IPCAN session, policy definition is following:

Strategy names: KA_DEFAULT_BEARER_GX_PCEF

Keep-alive main body=< type: PCEF, sign: PCEF-ID >

Keep-alive object=< type: PCRF, sign: PCRF-ID >

Keep-alive object=< type: BEARER, sign: DEFAULT-BEARER-ID >

Keepalive method=active keep-alive: do not give PCRF, the state of the PCC rule of report default bearing when there being the PCC rule to need when mutual to send CCR message in per 60 seconds on the default bearing;

Measuring method for activity=passive survey is lived: think inactivation when not receiving PCRF about any signaling of the default bearing of this IPCAN session in 3 minutes

Inactivation processing method=termination default bearing, and stop the IPCAN session

2, keep-alive strategies KA_DEFAULT_BEARER_PCEF, the default bearing that is used for setting up between PCEF couple and UE carry out keep-alive and live with surveying, and policy definition is following:

Strategy names: KA_DEFAULT_BEARER_PCEF

Keep-alive main body=< type: PCEF, sign: PCEF-ID >

Keep-alive object=< type: UE, sign: UE-ID >

Keep-alive object=< type: BEARER, sign: DEFAULT-BEARER-ID >

Keepalive method=passive keep-alive: response UE is that response is sent in the signaling request or the keep-alive request of default bearing

Measuring method for activity=passive survey is lived: think inactivation when not receiving UE about any signaling of this default bearing in 3 minutes

3, keep-alive strategies KA_DEFAULT_BEARER_UE, the default bearing that is used for setting up between UE couple and PCEF carry out keep-alive and live with surveying:

Strategy names: KA_DEFAULT_BEARER_UE

Keep-alive main body=< type: UE, sign: UE-ID >

Keep-alive object=< type: PCEF, sign: PCEF-ID >

Keep-alive object=< type: BEARER, sign: DEFAULT-BEARER-ID >

Keepalive method=active keep-alive: when having the traffic signaling needs mutual, do not send carrying keep-alive request to PCEF in per 60 seconds

Measuring method for activity=passive survey is lived: think inactivation when not receiving any signaling about this default bearing in 3 minutes

Inactivation processing method=termination default bearing

Step S406, in a last step, PCRF generates self keep-alive strategies KA_DEFAULT_BEARER_GX_PCRF to the default bearing of this IPCAN session simultaneously, and begins to carry out this keep-alive strategies;

4, keep-alive strategies KA_DEFAULT_BEARER_GX_PCRF is used for PCRF and the default bearing of IPCAN session is carried out keep-alive lives with surveying, and policy definition is following:

Strategy names: KA_DEFAULT_BEARER_GX_PCRF

Keep-alive main body=< type: PCRF, sign: PCRF-ID >

Keep-alive object=< type: PCEF, sign: PCEF-ID >

Keep-alive object=< type: BEARER, sign: DEFAULT-BEARER-ID >

Keepalive method=passive keep-alive: the CCR request of response PCEF and send CCA message

Measuring method for activity=passive survey is lived: think inactivation when not receiving PCEF about the CCR request of the default bearing of this IPCAN session in 3 minutes

Inactivation processing method=termination IPCAN session, and notice related network elements

Step S407, PCEF receive the qos policy and the keep-alive strategies of the default bearing that PCRF formulates, and install and carry out these strategies, and notice UE default bearing is set up successfully, and the keep-alive main body received of handle is that the keep-alive strategies KA_DEFAULT_BEARER_UE of UE passes to UE.Be that related network elements judges that the keep-alive main body is not for originally after one's death, keep-alive strategies is passed to keep-alive main body UE, thus, PCRF formulates the keep-alive strategies to UE, passes to UE through PCEF, in this way, has guaranteed the consistency of keep-alive strategies between network element.

Step S408, PCEF begin to carry out the keep-alive strategies KA_DEFAULT_BEARER_GX_PCEF of IPCAN session and the keep-alive strategies KA_DEFAULT_BEARER_PCEF of default bearing.

Step S409, UE receive that default bearing sets up success response, begin to carry out keep-alive strategies KA_DEFAULT_BEARER_UE.

Through this embodiment 1, the present invention has carried out the policy control method that the user reaches the standard grade under the Pull pattern.In said process, carrying out keep-alive strategies can comprise:

Keep-alive main body PCEF, UE and PCRF can regularly send and the relevant keep-alive message of said keep-alive object to the keep-alive object according to the active keepalive method in the keep-alive strategies; Perhaps according to the passive keepalive method in the keep-alive strategies, receive the keep-alive request message that the keep-alive object sends to said keep-alive main body and respond, send CCA message like the CCR request of PCEF.

And keep-alive main body PCEF, UE and PCRF regularly send the survey relevant with said keep-alive object message alive to the keep-alive object according to the active measuring method for activity in the keep-alive strategies; Perhaps according to the passive measuring method for activity in the keep-alive strategies; Said keep-alive main body waits for that said keep-alive object notifies said keep-alive object inactivation; Think inactivation when not receiving PCEF about the CCR request of the default bearing of this IPCAN session in 3 minutes like: PCRF, measuring method for activity has all adopted passive mode in this example.

Embodiment 2

Fig. 6 is according to the present invention the interacting message signaling process figure of the VoIP service call flow process of policy control method embodiment 2 in the communication system, and is as shown in Figure 6, and AF and PCEF adopt the Pull pattern to receive keep-alive strategies from PCRF, comprise the steps:

Step S501, UE sends request message in order to set up the VoIP traffic transmission to AF;

Step S502, AF resolve the professional transmission parameter of VoIP, to the PCRF request professional transmission of VoIP are authorized and resource reservation;

Step S503; PCRF according to user signing contract information and the rule configuration of self to the VoIP business of AF request contract checking, access control and reserved resource; And generation Rx session keepalive strategy; Authorize with the resource reservation success after, PCRF sends mandate success response message to AF, and carries the keep-alive strategies KA_RX_SESSION_AF of the Rx session that AF should carry out;

Keep-alive strategies KA_RX_SESSION_AF is used for AF the Rx session is carried out keep-alive and surveyed work, and policy definition is following:

Strategy names=KA_RX_SESSION_AF

Keep-alive main body=< type: AF, sign: AF-ID >

Keep-alive object=< type: PCRF, sign: PCRF-ID >

Keep-alive object=< type: SESSION, sign: RX-SESSION-ID >

Keepalive method=active keep-alive: when having traffic signaling, do not send the AAR request message to PCRF in per 60 seconds

Measuring method for activity=passive survey is lived: think inactivation when not receiving any signaling about this Rx session in 3 minutes

Inactivation processing method=end call, the notice related network elements discharges the Rx session

Step S504, in a last step, PCRF generates the keep-alive strategies KA_RX_SESSION_PCRF of the Rx session that self should implement simultaneously, and begins to carry out this keep-alive strategies;

Keep-alive strategies KA_RX_SESSION_PCRF is used for PCRF the Rx session is carried out keep-alive and surveyed work, and policy definition is following:

Strategy names=KA_RX_SESSION_PCRF

Keep-alive main body=< type: PCRF, sign: 1 >

Keep-alive object=< type: AF, sign: AF-ID >

Keep-alive object=< type: SESSION, sign: RX-SESSION-ID >

Keepalive method=passive keep-alive: the AAR request of response PCEF and send AAA message

Inactivation processing method=release Rx session related resource, the notice related network elements

After step S505, AF received and authorize success response message, notice UE had consulted the media parameter of the professional transmission of VoIP;

Step S506, AF parse the keep-alive strategies KA_RX_SESSION_AF that needs self to carry out from the mandate success response message of PCRF, install and carry out this keep-alive strategies;

Step S507, UE initiate to set up the request message of VoIP service bearer to PCEF;

Step S508, PCEF are that VoIP carries to PCRF transmission strategy request message;

Step S509, PCRF generates the qos policy that VoIP carries, and charging policy and keep-alive strategies are handed down to PCEF;

Wherein PCRF generate and send to PCEF the keep-alive strategies definition as follows:

1, keep-alive strategies KA_VOIP_BEARER_PCEF is used for PCEF VoIP carrying carrying out keep-alive is lived with surveying, and policy definition is following:

Strategy names=KA_VOIP_BEARER_PCEF

Keep-alive main body=< type: PCEF, sign: PCEF-ID >

Keep-alive main body=< type: UE, sign: UE-ID >

Keep-alive object=< type: BEARER, sign: VOIP-BEARER-ID >

Keepalive method=passive keep-alive: the response UE the carrying demand signalling and send bearing response message

Measuring method for activity=passive survey is lived: think inactivation when not receiving any signaling about this carrying in 1 minute

Inactivation processing method=release VOIP carries related resource, the notice related network elements

2, keep-alive strategies KA_VOIP_BEARER_UE is used for UE VoIP carrying carrying out keep-alive is lived with surveying:

Strategy names: KA_VOIP_BEARER_UE

Keep-alive main body=< type: UE, sign: UE-ID >

Keep-alive object=< type: PCEF, sign: PCEF-ID >

Keep-alive object=< type: BEARER, sign: VOIP-BEARER-ID >

Keepalive method=active keep-alive: when having traffic signaling, do not send carrying keep-alive request to PCEF in per 20 seconds

Inactivation processing method=termination VOIP carries

3, keep-alive strategies KA_VOIP_BEARER_GX_PCEF is used for PCEF the PCC rule of the VoIP carrying of Gx interface IPCAN session is carried out keep-alive and surveyed alive:

Strategy names: KA_VOIP_BEARER_GX_PCEF

Keep-alive main body=< type: PCEF, sign: PCEF-ID >

Keep-alive object=< type: PCRF, sign: PCRF-ID >

Keep-alive object=< type: BEARER, sign: VOIP-BEARER-ID >

Keepalive method=active keep-alive: when having traffic signaling, do not send CCR message to PCRF in per 20 seconds, the PCC rule state in the report VoIP carrying;

Measuring method for activity=passive survey is lived: think inactivation when not receiving any signaling that PCRF carries about the VoIP of this IPCAN session in 1 minute

Inactivation processing method=termination IPCAN session, and stop default bearing

Step S510, in a last step, PCRF generates the keep-alive strategies that VoIP carries for self simultaneously, and begins to carry out this keep-alive strategies;

Keep-alive strategies KA_VOIP_BEARER_GX_PCRF is used for PCRF VOIP carrying the carrying out keep-alive of IPCAN session is lived with surveying:

Strategy names: KA_VOIP_BEARER_GX_PCRF

Keep-alive main body=< type: PCRF, sign: PCRF-ID >

Keep-alive object=< type: PCEF, sign: PCEF-ID >

Keep-alive object=< type: BEARER, sign: VOIP-BEARER-ID >

Measuring method for activity=passive survey is lived: think inactivation when not receiving the CCR request that PCEF carries about the VoIP of this IPCAN session in 1 minute

Step S511, PCEF receives the qos policy that VoIP carries, charging policy, qos policy and charging policy are installed and implemented to keep-alive strategies, and notice UE has set up VoIP and has carried, and in response message, transmits the keep-alive strategies KA_VOIP_BEARER_UE that UE should carry out; Be that related network elements judges that the keep-alive main body is not for originally after one's death, keep-alive strategies is passed to keep-alive main body UE, thus, PCRF formulates the keep-alive strategies to UE, passes to UE through PCEF, in this way, has guaranteed the consistency of keep-alive strategies between network element.

Step S512, PCEF install and implement keep-alive strategies KA_VOIP_BEARER_PCEF and the KA_VOIP_BEARER_GX_PCEF relevant with self;

Step S513, UE receive that VoIP carries the successful response message of foundation, begins to activate the transmission of VoIP Business Stream.

Step S514, UE install and carry out keep-alive strategies KA_VOIP_BEARER_UE.

Through this embodiment, carried out the policy control method that the user initiates the VoIP business under the Pull pattern.In said process, carrying out keep-alive strategies can comprise:

Keep-alive main body PCEF, UE and PCRF can regularly send and the relevant keep-alive message of said keep-alive object to the keep-alive object according to the active keepalive method in the keep-alive strategies; Perhaps according to the passive keepalive method in the keep-alive strategies, the keep-alive main body receives the keep-alive object and responds to the keep-alive request message of its transmission, like the CCR request of PCRF response PCEF and send CCA message.

And keep-alive main body PCEF, UE and PCRF regularly send the survey relevant with said keep-alive object message alive to the keep-alive object according to the active measuring method for activity in the keep-alive strategies; Perhaps according to the passive measuring method for activity in the keep-alive strategies, said keep-alive main body waits for that said keep-alive object notifies said keep-alive object inactivation, as: think inactivation when not receiving the CCR request that PCEF carries about the VoIP of this IPCAN session in PCRF1 minute.Measuring method for activity has all adopted passive mode in this example.

Embodiment 3

Fig. 7 be according to the present invention in the communication system webmaster of policy control method embodiment 3 trigger to revise the interacting message signaling process figure of the professional keep-alive strategies of VoIP, as shown in Figure 7, PCRF adopts the Push pattern to push amended keep-alive strategies, comprises the steps:

Step S601, webmaster should run the demand of negotiating the transfer of whole VoIP business keep-alive strategies, trigger the keepalive period of PCRF adjustment VoIP business and live the cycle with survey, put respectively to be twice;

Step S602, PCRF initiatively send keep-alive strategies adjustment request and give AF, carry amended keep-alive strategies KA_RX_SESSION_AF;

Step S603, AF receives keep-alive strategies and revises request, adjustment keep-alive strategies KA_RX_SESSION_AF, and reporting strategy adjustment result gives AF;

Step S604, AF begin to carry out adjusted keep-alive strategies KA_RX_SESSION_AF;

Step S605, PCRF receive the adjustment result of the keep-alive strategies KA_RX_SESSION_AF of AF report, and the affirmation keep-alive strategies is adjusted successfully, begins to adjust and carry out the keep-alive strategies KA_RX_SESSION_PCRF of self;

Step S606, PCRF send keep-alive strategies adjustment request and give PCEF, carry amended keep-alive strategies KA_VOIP_BEARER_GX_PCEF, KA_VOIP_BEARER_PCEF, KA_VOIP_BEARER_UE;

Step S607, PCEF transmit amended keep-alive strategies KA_VOIP_BEARER_UE and give UE;

Step S608, UE install amended keep-alive strategies KA_VOIP_BEARER_UE, and reporting strategy adjustment result gives PCEF;

Step S609, UE begin to carry out adjusted keep-alive strategies KA_VOIP_BEARER_UE;

Step S610, PCEF report keep-alive strategies KA_VOIP_BEARER_GX_PCEF, KA_VOIP_BEARER_PCEF, the adjustment result of KA_VOIP_BEARER_UE;

Step S611, PCRF confirm that keep-alive strategies KA_VOIP_BEARER_GX_PCEF, KA_VOIP_BEARER_PCEF, KA_VOIP_BEARER_UE adjust successfully, begin to carry out adjusted keep-alive strategies KA_VOIP_BEARER_GX_PCRF;

Through this embodiment, carried out the policy control method of the professional keep-alive strategies of modification VoIP that webmaster is initiated under the Push pattern.Keep-alive strategies in the foregoing description is like in the above-described embodiments description, the keep-alive of concrete implementation strategy with survey the consistent of process above embodiment 2 descriptions of living.

Pass through the above embodiment of the present invention; PCRF concentrates and generates and the distribution keep-alive strategies; Inconsistent and the consequent call loss risk that keep-alive strategies dispersion customization brings in the prior art and the problem of decrease in efficiency have been solved; Strengthened the policy control ability, and made the modification of keep-alive strategies become easy.

Should be noted that at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although the present invention is specified with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment, change the present invention or be equal to replacement, and do not break away from the spirit and the scope of the present invention and claim.

Claims

1. the policy control method in the communication system is characterized in that, comprising:

2. the policy control method in the communication system as claimed in claim 1 is characterized in that, the said information that is used to formulate keep-alive strategies comprises:

Business information, user accessing information, user signing contract information, accept the strategy that is provided with in advance of link information, network load condition or operator.

3. the policy control method in the communication system as claimed in claim 2 is characterized in that, said keep-alive strategies comprises:

The strategy names that is used for a keep-alive strategies of unique identification;

Keep-alive main body as said keep-alive strategies implementer;

As said keep-alive strategies by implementer's keep-alive object;

Set up the keep-alive object that connects between said keep-alive main body and the said keep-alive object;

Said keep-alive main body is understood said keep-alive object and oneself is still safeguarded the keepalive method of keep-alive object;

Said keep-alive main body is confirmed the measuring method for activity whether said keep-alive object continues to survive; With

Said keep-alive subject detection is to the said keep-alive object inactivation processing method behind the inactivation.

4. the policy control method in the communication system as claimed in claim 3 is characterized in that, the said keep-alive strategies of said execution comprises:

Said keep-alive main body is regularly sent and the relevant keep-alive message of said keep-alive object to said keep-alive object according to the keepalive method in the said keep-alive strategies; Perhaps

According to the keepalive method in the said keep-alive strategies, said keep-alive object sends the keep-alive request message to said keep-alive main body.

5. the policy control method in the communication system as claimed in claim 3 is characterized in that, the said keep-alive strategies of said execution comprises:

Said keep-alive main body is regularly sent the survey relevant with said keep-alive object message alive to said keep-alive object according to the measuring method for activity in the said keep-alive strategies; Perhaps

According to the measuring method for activity in the said keep-alive strategies, said keep-alive main body waits for that said keep-alive object notifies said keep-alive object inactivation.

6. like the policy control method in the arbitrary described communication system of claim 1-5, it is characterized in that said policy control center is distributed to corresponding network element with said keep-alive strategies and is specially:

Said network element sends strategy request message or authorization request message to said policy control center, and distribute said keep-alive strategies according to said strategy request message at said policy control center.

7. like the policy control method in the arbitrary described communication system of claim 1-5, it is characterized in that said policy control center is distributed to corresponding network element with said keep-alive strategies and is specially:

Said policy control center initiatively is distributed to corresponding network element with said keep-alive strategies.

8. like the policy control method in the arbitrary described communication system of claim 1-5, it is characterized in that, also comprise:

After said keep-alive main body was carried out said keep-alive strategies failure, said keep-alive main body was returned the report of carrying out said keep-alive strategies failure to said policy control center.

9. like the policy control method in the arbitrary described communication system of claim 1-5, it is characterized in that, also comprise:

When generating said keep-alive strategies, said policy control center also generates the keep-alive strategies of itself, and carries out said itself keep-alive strategies.

10. a policy controlling system is characterized in that, comprising:

11. policy controlling system as claimed in claim 10 is characterized in that, said policy control center comprises:

The policy development module is connected with said acquisition module, and the information that is used for obtaining according to said acquisition module is formulated keep-alive strategies; With

12. policy controlling system as claimed in claim 11 is characterized in that, said policy control center also comprises:

The inactivation processing module is connected the keep-alive strategies that is used to formulate, the inactivation processing method at the said policy control center of stipulating in the enforcement keep-alive strategies with the survey flexible module with said policy development module.

13. policy controlling system as claimed in claim 10 is characterized in that, said network element comprises:

14. a policy controlling system is characterized in that, comprising:

Application Function is communicated by letter through Rx interface with said "Policy and Charging Rules Function entity, is used to receive said keep-alive strategies, and checks the keep-alive main body in the said keep-alive strategies; When said keep-alive main body is itself, then carry out said keep-alive strategies; Perhaps when said keep-alive main body be not during for itself, then said keep-alive strategies is passed to said keep-alive main body, and said keep-alive main body is carried out said keep-alive strategies.

15. policy controlling system as claimed in claim 14 is characterized in that, said "Policy and Charging Rules Function entity comprises:

16. policy controlling system as claimed in claim 15 is characterized in that, said "Policy and Charging Rules Function entity also comprises:

17. policy controlling system as claimed in claim 14 is characterized in that, said strategy and charging execution function entity comprise:

18. policy controlling system as claimed in claim 14 is characterized in that, said Application Function comprises: