CN105376174A

CN105376174A - Method and apparatus for performing policy based on service chaining in LTE/EPC

Info

Publication number: CN105376174A
Application number: CN201410422462.2A
Authority: CN
Inventors: 汪治; 蔡亦钢
Original assignee: Alcatel Optical Networks Israel Ltd
Current assignee: Alcatel Optical Networks Israel Ltd
Priority date: 2014-08-25
Filing date: 2014-08-25
Publication date: 2016-03-02
Anticipated expiration: 2034-08-25
Also published as: WO2016030747A1; CN105376174B

Abstract

An objective of the invention is to provide a method and an apparatus for performing a policy based on service chaining in LTE/EPC. Specifically, the PCRF device generates a corresponding service chaining policy in response to a control charging request about to-be-provided user data sent by a corresponding PCEF device, the service chaining policy is sent to the PCEF device based on a service chaining policy install attribute value pair corresponding to the service chaining policy in an extended Gx interface, the PCEF device performs the service chaining policy for the user data. Compared with the prior art, the present invention introduces the service chaining function into the L TE/EPC, such that the existing 3GPP LTE/EPC control plane architecture and policy can support the software defined network (SDN) open flow and service chaining.

Description

Perform the method and apparatus based on the strategy of service chaining in LTE/EPC

Technical field

The present invention relates to communication technical field, particularly relating to a kind of technology for performing based on the strategy of service chaining in LTE/EPC.

Background technology

Service chaining (servicechaining) is the concept ordered set of service being applied to packet or stream, also, service chaining refer to be supplied to the data of user before reaching the user processing procedure corresponding to some row services of process.Except basic route and forwarding capability, service in chain can comprise such as load balancing, fire compartment wall, intrusion prevention, deep-packet detection (DPI, DeepPacketInspection), Lawful Interception (LI, LawfulIntercept) module, NAT (NetworkAddressTranslation, network address translation) 44 (RFC3022), NAT64 (RFC6146), DS-LiteAFTR (DS-Lite:DualStackLite, two stacks of lightweight, AFTR:AddressFamilyTranslationRouter, address race translation router, RFC6333), NPTv6 (IPv6-to-IPv6NetworkPrefixTranslation, the network prefix conversion of IPv6 to IPv6, RFC6296), HOST_ID injects, HTTP head improves function, TCP (TransmissionControlProtocol, transmission control protocol) service of adjustment and optimizational function etc.Standard for service chaining being applied to packet or stream can based on across OSI (OpenSystemInterconnection, Open System Interconnection) layer is (such as, physical port, ethernet mac (MediaAccessControl, medium access control) header, IP header information, transmission and application layer information) packet/stream attribute.

Service chaining is about by other service chaining (serial or parallel) or insert service, or about by multiple delivery of services to the ability in constant current.It is intelligence flow insertion and the granular policy enforcement engine of heterogeneous networks service.Provide and create the value-added service of innovation and the new paragon of mobile network's assets currency.

Service chaining concept becomes popular recently, and IETF (engineering duty group, InternetEngineeringTaskForce) has drafted " the different service function chain framework services chain framework 00 " that describe about some thoughts of service chaining.Some equipment business propose for software defined network (SDN, SoftwareDefinedNetwork) picture/mb-type service link by.

But, at 3GPPLTE/EPC (EPC, EvolvedPackageCore, evolution block core) do not have in structure related art can realize service chaining service and policy control and management, therefore, prior art cannot realize using existing 3GPPLTE/EPC control plane structure and policy control in support SDNOpenFlow and service chaining.

Summary of the invention

An object of the present invention is to provide a kind of method and apparatus for performing based on the strategy of service chaining in LTE/EPC.

According to an aspect of the present invention, provide a kind of method for performing based on the strategy of service chaining in LTE/EPC, wherein, the method comprises the following steps:

The control accounting request about user data to be supplied that aPCRF device responds sends in the PCEF equipment of correspondence, generate corresponding service chaining strategy, to set up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, described service chaining strategy is sent to described PCEF equipment;

PCEF equipment described in b performs described service chaining strategy to described user data.

According to a further aspect in the invention, additionally provide a kind of PCRF equipment for performing based on the strategy of service chaining in LTE/EPC, wherein, this PCRF equipment comprises:

Strategy generating device, for the control accounting request about user data to be supplied sent in response to the PCEF equipment of correspondence, generates corresponding service chaining strategy;

First dispensing device, for setting up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, is sent to described PCEF equipment by described service chaining strategy.

In accordance with a further aspect of the present invention, additionally provide a kind of PCEF equipment for performing based on the strategy of service chaining in LTE/EPC, wherein, this PCEF equipment comprises:

First receiving device, for receiving the service chaining strategy that corresponding PCRF device responds sends in the control accounting request about user data to be supplied;

First final controlling element, for performing described service chaining strategy to described user data.

According to another aspect of the invention, additionally provide a kind of system for performing based on the strategy of service chaining in LTE/EPC, wherein, this system comprises as aforementioned PCRF equipment according to a further aspect of the invention, and as aforementioned PCEF equipment according to a further aspect of the present invention.

According to also one side of the present invention, additionally provide the system based on the strategy of service chaining in a kind of LTE/EPC for performing support software define grid, wherein, this system comprises as aforementioned PCRF equipment according to a further aspect of the invention, and as aforementioned PCEF equipment according to a further aspect of the present invention.

Compared with prior art, in one embodiment of the present of invention, the control accounting request about user data to be supplied that PCRF device responds sends in the PCEF equipment of correspondence, generate corresponding service chaining strategy, to set up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, described service chaining strategy is sent to described PCEF equipment, PCEF equipment performs described service chaining strategy to described user data, thus service chaining function is introduced LTE/EPC by the present invention, make existing 3GPPLTE/EPC control plane structure and strategy can support software define grid (SDN) openflow and service chaining, correspondingly, the present invention also enhances the PCC with service chaining, and (strategy and charging control, PolicyandChargingControl) framework, can be applicable to the applicable any field of PCC, further, present invention also offers the new way of innovation value-added service and mobile network's assets currency, closer, present invention provides flexible, extendible LTE/EPC architecture and effective new service insertion and upgrade, and the dynamic expansion of support resource, and the present invention strengthens existing Gx interface, achieving service chaining strategy can be downloaded in PCEF equipment from PCRF equipment.

Accompanying drawing explanation

By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:

It is a kind of for performing in LTE/EPC based on the PCRF equipment of the strategy of service chaining and the equipment schematic diagram of PCEF equipment that Fig. 1 illustrates according to one aspect of the invention;

Fig. 2 illustrates that the one of service chaining Policy Table according to an embodiment of the invention realizes schematic diagram;

Fig. 3 illustrates a kind of for performing in LTE/EPC based on the PCRF equipment of the strategy of service chaining and the equipment schematic diagram of PCEF equipment of a preferred embodiment of the invention;

Fig. 4 illustrates that PCRF equipment according to a further aspect of the present invention and PCEF equipment coordinate and realizes a kind of method flow diagram for performing based on the strategy of service chaining in LTE/EPC;

Fig. 5 illustrates that PCRF equipment in accordance with a preferred embodiment of the present invention and PCEF equipment coordinate and realizes a kind of method flow diagram for performing based on the strategy of service chaining in LTE/EPC.

In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

It is a kind of for performing in LTE/EPC based on the PCRF equipment 1 of the strategy of service chaining and the equipment schematic diagram of PCEF equipment 2 that Fig. 1 illustrates according to one aspect of the invention, wherein PCRF equipment 1 comprises strategy generating device 11 and the first dispensing device 12, PCEF equipment 2 comprises first receiving device 21 and the first final controlling element 22.Particularly, the control accounting request about user data to be supplied that the strategy generating device 11 of PCRF equipment 1 sends in response to the PCEF equipment of correspondence, generates corresponding service chaining strategy; First dispensing device 12 sets up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, and described service chaining strategy is sent to described PCEF equipment; Correspondingly, the first receiving device 21 of PCEF equipment 2 receives the service chaining strategy that corresponding PCRF device responds sends in the control accounting request about user data to be supplied; First final controlling element 22 performs described service chaining strategy to described user data.

At this, PCRF (strategy and charging rule functions, PolicyandChargingRulesFunction) equipment 1 refers to can be that (IP connects Access Network to IP-CAN, IP-ConnectivityAccessNetwork) session establishment generates service chaining strategy and this service chaining strategy is sent to PCEF (strategy and charge execution function, PolicyandChargingEnforcementFunction) functional entity that performs for it of equipment 2, in specific implementation, PCRF equipment 1 can be the expansion of existing PCRF.Wherein, service chaining strategy refers to the data to user to be supplied determined need to experience which a series of service before reaching the user.Service chaining in the present invention can be configured and manage can needed in all softwares of application as service.

At this, PCEF equipment 2 refers to the functional entity performing the service chaining strategy that PCRF equipment 1 sends, it can be positioned at gateway, such as GPRS (general packet radio service, GeneralPacketRadioService) GGSN (Gateway GPRS Support Node, GatewayGPRSSupportNode) gateway, EPC (evolution block core, EvolvedPacketCore) P-GW (PDN Gateway, PDNGateway), it is PDG (packet data gateway in WLAN, PacketDataGateway), also can independently dispose, in specific implementation, PCEF equipment 2 can be the expansion of existing PCRF.

Those skilled in the art will be understood that above-mentioned PCRF equipment 1 and PCEF equipment 2 are only citing; other PCRF equipment that are existing or that may occur from now on or PCEF equipment are as being applicable to the present invention; also within scope should being included in, and this is contained at this with way of reference.

Particularly, the control accounting request about user data to be supplied that the strategy generating device 11 of PCRF equipment 1 sends in response to the PCEF equipment of correspondence, generates corresponding service chaining strategy.Such as, suppose user A by its user terminal access IP network as video website etc., to watch video as video-A, this access can be considered IP-CAN session, for this video data (i.e. user data) of user A of giving to be supplied as user-Adata, PCEF equipment 2 have sent the control accounting request about this user data to the PCRF equipment 1 of correspondence, i.e. CC-Request (CCR), then the strategy generating device 11 of PCRF equipment 1 is once receive this CCR, just corresponding service chaining strategy is generated, at this, the mode that strategy generating device 11 generates described service chaining strategy includes but not limited to following at least any one:

1) in the predefined service chaining policy library of the service provider corresponding to described user data, matching inquiry is carried out, to obtain the service chaining strategy corresponding with described user data.

Such as, connect example, suppose that network video source such as service-provider-A can provide video video-A, namely also network video source such as service-provider-A is the service provider of video video-A, if it for the predefined service chaining strategy of video video-A is: before video data arrives user, need through safety detection, routing optimality, distribute a series of services such as bandwidth resources, at this, can by this service chaining policy tag position service-chaining-policy-A1, then strategy generating device 11 by call network video source as service-provider-A the application programming interfaces (API) of service chaining policy library that provide, matching inquiry is carried out in this service chaining policy library, obtain the service chaining strategy and service-chaining-policy-A1 that correspond to video video-A.

2) based on the rule that the service provider corresponding to described user data provides, dynamically service chaining strategy is generated.At this, service provider controls (PCC, PolicyandChargingControl) by strategy and charging and determines to input the service chaining strategy that (detailed content is see 3GPPTS23.203,6.2.1.1 part) provide relevant.At this, described rule includes but not limited to as service chaining strategy that i) dissimilar user is corresponding different, wherein, the type of user can based on user's multidimensional property (such as, user's differentiation, billing data plan, position, access technology, age, time cycle, user preference, etc.) divide; Ii) the service chaining strategy that dissimilar user data is corresponding different.

Such as, suppose user A belong to higher-level user (as its IP address and user data is provided service provider corresponding to network node between close together, its user terminal is by WiFi access network, the set meal rate amount of money is larger, user requires higher to service quality (QoS), belong to particular customer colony etc.), and and user A belong to lower-level user (as its IP address and provide distant between the network node corresponding to the service provider of user data by the user B of access to netwoks video video-A simultaneously, its user terminal is by GPRS access network, set meal rate are minimum amount set meal etc.), then strategy generating device 11 couples of user A and user B, generate different service chaining strategies respectively, service chaining strategy as generated for user A is service-chaining-policy-A2: be supplied to the video data of the video video-A of user A successively through following processing procedure: safety detection, routing optimality, distribute 100M bandwidth resources, network address translation, and be user B generate service chaining strategy be service-chaining-policy-B: be supplied to the video data of the video video-A of user B successively through following processing procedure: safety detection, distribute 10M bandwidth resources.

Those skilled in the art will be understood that the mode of the described service chaining strategy of above-mentioned generation is only citing; the mode of the described service chaining strategy of other generations that are existing or that may occur from now on is as being applicable to the present invention; also within scope should being included in, and this is contained at this with way of reference.

Preferably, also can comprise in the described service chaining strategy that strategy generating device 11 generates is not by PCEF equipment 2 and TDF (flow detection function, TrafficDetectionFunction) detect some/some services, but this service by PCRF equipment 1 because value-added functionality or other objects force to issue.

At this, the present invention dynamically generates described service chaining strategy, extend the performance of existing PCRF, not only define application (as user data etc.) the detection and control rule about QoS, also support as each application program obtains service function chain, therefore user's multidimensional property is considered (such as, user's differentiation, billing data plan, position, access technology, age, time cycle, user preference, etc.), application can be tied to the service chaining be associated by PCRF equipment 1 of the present invention.Thus PCRF equipment 1 of the present invention can be application and user dynamically defines the type of service function chain.Therefore, the invention enables existing 3GPPLTE/EPC control plane structure and strategy can support software define grid (SDN) openflow and service chaining.

Then, the first dispensing device 12 sets up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, and described service chaining strategy is sent to described PCEF equipment.Such as, for user A, first dispensing device 12 controls charging response (CCA by sending to PCEF equipment 2, CC-Answer) message, this message comprises in expansion Gx interface sets up AVP about the service chaining strategy of service chaining strategy, namely set up in AVP the service chaining strategy service-chaining-policy-A1 comprised corresponding to video video-A at service chaining strategy, thus service chaining strategy service-chaining-policy-A1 is sent to PCEF equipment 2.

At this, next as follows to described expansion Gx interface specification:

The present invention is by strengthening (as increased new service chaining policy attribute value to (AVP in existing Gx interface to the Gx interface between existing PCRF and PCEF, Attribute-Value-Pairs)) be downloaded to PCEF equipment 2 with Service supportive chain strategy from PCRF equipment 1, new service chaining strategy AVPs comprises following:

1) service chaining strategy sets up AVP (Service-Chaining-Policy-InstallAVP)

Its form is:

Service chaining strategy sets up AVP for Service supportive chain policy control in 3GPPLTE/EPC network, can be added into existing DiameterGx interface.

It is packet type that service chaining strategy sets up AVP, for activating from PCRF equipment 1 to the service chaining strategy of PCEF equipment 2, set up or revise.

In order to set up new service chaining strategy or revise the service chaining strategy set up, service chaining strategy sets up AVP can in the CCA message being sent to PCEF equipment 2 from PCRF equipment 1, or re-authenticate in request (RAR, Re-Auth-Request) message and used (can with reference to TS29.210 about CCA and RAR).

Service chaining strategy flow detection function (TDF, TrafficDetectionFunction) application identities symbol (TDF-Application-Identifier) AVP set up in AVP indicates the service chaining strategy service chaining strategy set up in AVP to be established or to activate and is detected in the application that filter identifies being accorded with application that AVP quotes by TDF application identities.

If regulation activationary time (Rule-Activation-Time) or regulation deexcitation time (Rule-Deactivation-Time) are designated, then it is applicable to service chaining strategy and sets up all PCC regulation in AVP.

It should be noted, it is all the existing GxAVP defined in 3GPPTS29212 that the service chaining strategy TDF application identities set up in AVP accords with AVP, regulation activationary time and regulation deexcitation time.

Except TDF application identities symbol AVP, existing stream information (Flow-Information) AVP also can be used for the flow determining to belong to server data stream.Stream information AVP or TDF application identities symbol AVP will be present in charging regulation definition (Charging-Rule-Definition) AVP.

In addition, set up AVP form from above service chaining strategy can see, service chaining strategy is set up in AVP and is also comprised service chaining policy identifier (Service-Chaining-Policy-Identifier) and service chaining strategy definition (Service-Chaining-Policy-Definition), is described respectively below to service chaining policy identifier AVP and service chaining strategy definition AVP:

2) service chaining policy identifier AVP (Service-Chaining-Policy-IdentifierAVP)

Service chaining policy identifier is eight bit byte string type, and it defines unique service chaining strategy.For the service chaining strategy provided by PCRF equipment 1, the service chaining strategy in the IP-CAN session of this identifier unique identification.For service chaining strategy predefined in PCEF equipment 2, the service chaining strategy of this identifier unique identification in PCEF equipment 2.

Service chaining policy identifier AVP is the unique character of related service for identifying in the service chaining that allows in PCRF equipment 1, and it can be digital, alphabetical etc.Service provider can provide the service chaining identifier of the one group of service be uniquely mapped to about service chaining function.Or PCEF equipment 2 or TDF also can use service chaining policy identifier AVP to search for local service chain policy mappings in service chaining Policy Table.Service chaining Policy Table is made up of one group of service chaining strategy.

For activating the service chaining strategy of predefined specific PCC in PCEF equipment 2, service chaining policy identifier AVP should be used as the reference of service chaining strategy.

Service chaining policy identifier can start the online chain service estimated in brand-new mode with the charge system that rolls off the production line in IP-CAN data flow.

3) service chaining strategy definition AVP (Service-Chaining-Policy-DefinitionAVP)

Its form is:

Service chaining strategy definition AVP is packet type, and its definition is sent to the service chaining strategy of PCEF equipment 2 by PCRF equipment 1.This service chaining strategy of unique identification is carried out by service chaining policy identifier AVP.

In addition, can see from above service chaining strategy definition AVP form, service chaining strategy definition AVP comprises service chaining policing rule (Service-Chaining-Policy-Rule), is described below to service chaining policing rule AVP:

4) service chaining policing rule AVP

Service chaining policing rule AVP comprises the Rule content of service chaining strategy, and wherein, the form of the regular available service chain Policy Table of service chaining strategy is expressed.Fig. 2 illustrates SFC (the service function chain of a kind of " service function chain framework---the service chaining framework 00 of differentiation " (the DifferentiatedServiceFunctionChainingFrameworkdraft-bouc adair-service-chaining-framework-00) that realize about service chaining Policy Table, ServiceFunctionChaining) Policy Table's example, as seen from Figure 2, a SF (service function, ServiceFunction) a service chaining rule is mapped as, such as, SFC_MAP_INDEX1 (such as, { SFC_MAP_INDEX1, { SFa, SFc}}) mean that service chaining is made up of 2 service function SFa and SFb.

Correspondingly, the first receiving device 21 of PCEF equipment 2, by the Gx interface of expansion, receives the service chaining strategy that PCRF equipment 1 sends in response to the control accounting request about user data to be supplied.

First final controlling element 22 performs described service chaining strategy to described user data.Such as, for user A, suppose that first receiving device 21 receives the service chaining strategy service-chaining-policy-A1 corresponding to video video-A, then the first final controlling element 22 performs the service comprised in service chaining strategy service-chaining-policy-A1 to the video data about video video-A, namely, after a series of services such as safety detection, routing optimality, distribution 100M bandwidth resources being performed to this video data, user A is finally provided it to.

Preferably, PCEF equipment 2 be service link by Ingress node, according to the service chaining strategy downloaded from PCRF equipment 1, sorting flow also can be tied to the service chaining that is associated and be forwarded to this sorting flow by a series of service functions of service chaining strategy decision by PCEF equipment 2.

Constant work between each device of PCRF equipment 1 and PCEF equipment 2.Particularly, the strategy generating device 11 of PCRF equipment 1 continues the control accounting request about user data to be supplied sent in response to the PCEF equipment of correspondence, generates corresponding service chaining strategy; First dispensing device 12 continues to set up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, and described service chaining strategy is sent to described PCEF equipment; Correspondingly, the service chaining strategy that the PCRF device responds that first receiving device 21 continuous reception of PCEF equipment 2 is corresponding sends in the control accounting request about user data to be supplied; First final controlling element 22 continues to perform described service chaining strategy to described user data.At this, those skilled in the art are to be understood that described " continuing " refers to the generation and transmission and execution of constantly carrying out service chaining strategy between PCRF equipment 1 and each device of PCEF equipment 2 respectively, until PCRF equipment 1 stops generating described service chaining strategy in a long time.

In a preferred embodiment (with reference to figure 1), wherein, PCEF equipment 2 also comprises the second dispensing device (not shown), and PCRF equipment 1 also comprises the second receiving system (not shown).Particularly, the second dispensing device of PCEF equipment 2 sends described control accounting request to described PCRF equipment 1, wherein, comprises the first relevant information of described PCEF equipment in described control accounting request; Wherein, the described first relevant packets of information draws together following at least any one: the current service chaining strategy performed in-described PCEF equipment;-described PCEF equipment is to the event of described PCRF device report; Correspondingly, the second receiving system of PCRF equipment 1 receives the described control accounting request that described PCEF equipment 2 sends, and wherein, comprises the first relevant information of described PCEF equipment in described control accounting request; Wherein, strategy generating device 11, in response to described control accounting request, according to described first relevant information, generates described service chaining strategy.

Particularly, the second dispensing device of PCEF equipment 2 sends described control accounting request to described PCRF equipment 1, wherein, comprises the first relevant information of described PCEF equipment in described control accounting request; Wherein, the described first relevant packets of information draws together following at least any one: the current service chaining strategy performed in-described PCEF equipment;-described PCEF equipment is to the event of described PCRF device report.

Such as, for user A, it passes through user terminal access IP network as video website etc., to watch video as video-A, for this video data (i.e. user data) of user A of giving to be supplied as user-Adata, PCEF equipment 2 have sent the CCR about this user data to the PCRF equipment 1 of correspondence, also comprises following first relevant information of PCEF equipment 2 in this CCR: i) in PCEF equipment 2 the current service chaining strategy performed as service-chaining-policy-C; Ii) event reported to PCRF equipment 1 of PCEF equipment 2, as 3GPPTS20.3036.1.4 partial event triggers (EventTrigger) to outgoing event, such as, PLMN (public land communication network, PublicLandMobileNetwork) change, change in location, QoS change etc., and about the situation report of service execution in service chaining strategy in PCEF equipment 2, such as, be successfully completed to the service link of user data by, service chaining routing failure and reason etc. thereof.

Those skilled in the art will be understood that above-mentioned first relevant information is only citing, and other existing or first relevant informations that may occur from now on, as being applicable to the present invention, within also should being included in scope, and are contained in this at this with way of reference.

Correspondingly, the second receiving system of PCRF equipment 1, by the Gx interface of expansion, receives the described control accounting request that described PCEF equipment 2 sends, wherein, comprises the first relevant information of described PCEF equipment in described control accounting request.

Then, strategy generating device 11, in response to described control accounting request, according to described first relevant information, generates described service chaining strategy.

Such as, for user A, suppose that the second receiving system of PCRF equipment 1 receives the CCR of PCEF equipment 2 transmission, the current service chaining strategy performed is comprised in PCEF equipment 2 as service-chaining-policy-C in this CCR, and the execution result information of each service in service chaining strategy service-chaining-policy-C, such as, suppose to comprise following service in service chaining strategy service-chaining-policy-C: safety detection, routing optimality, distribute 100M bandwidth resources, HOST_ID injects, failure is performed to during second service " routing optimality " if perform in service chaining strategy service-chaining-policy-C, then the execution result of second service " routing optimality " also can be sent to PCRF equipment 1 by PCEF equipment 2 in CCR, correspondingly, second receiving system of PCRF equipment 1 also receives in service chaining strategy service-chaining-policy-C and performs failed information to during second service " routing optimality ", because of service chaining strategy service-chaining-policy-C with in the predefined service chaining of the service provider corresponding to video video-A policy library, carry out the service chaining strategy service-chaining-policy-A1 that matching inquiry obtains have identical service, then strategy generating device 11 is in response to CCR, when generating service chaining strategy, failed information can be performed to during second service " routing optimality " according in service chaining strategy service-chaining-policy-C, service in adjustment service chaining strategy service-chaining-policy-A1, as directly skipped or delete service " routing optimality ", generating final service chaining strategy is service-chaining-policy-A3, it comprises following service: safety detection, distribute 100M bandwidth resources.Simultaneously, PCRF equipment 1 performs failed information according to receiving in service chaining strategy service-chaining-policy-C to during second service " routing optimality ", new service chaining strategy can be generated for PCEF equipment 2, and by suitable information as Re-Auth-Request (RAR) by this new service chaining policy distribution to PCEF equipment 2.

Those skilled in the art will be understood that the above-mentioned mode generating described service chaining strategy according to described first relevant information is only citing; other existing or may occur from now on generate the mode of described service chaining strategy as being applicable to the present invention according to described first relevant information; also within scope should being included in, and this is contained at this with way of reference.

Preferably, strategy generating device 11 also can in response to described control accounting request, according to described first relevant information, and the second relevant information, generate described service chaining strategy.At this, the described second relevant packets of information is drawn together but is not limited to as user profile i) stored in user property memory (SPR, Subscriptionprofilerepository); Ii) other network element are (as MME (mobile management entity, MobileManagementEntity), eNB (evolved base station, evolvedNodeB), HSS (home subscriber server, HomeSubscriberServer)) provide about information such as user profile, user profile change, changes in network condition; Iii) information that provides of service provider, as user preference etc.

Such as, connect example, for user A, strategy generating device 11 is first based on described first relevant information, the service chaining strategy generated is service-chaining-policy-A3, it comprises following service: safety detection, distribute 100M bandwidth resources, suppose that strategy generating device 11 receives the very poor of current network conditions change from base station, then the service of the 3rd in service chaining strategy service-chaining-policy-A3 " distribution 100M bandwidth resources " can be adjusted to " distributing 10M bandwidth resources " by strategy generating device 11, correspondingly, service chaining strategy after adjustment is service-chaining-policy-A4, it comprises following service: safety detection, distribute 10M bandwidth resources.

Those skilled in the art will be understood that the mode that the second relevant information described in above-mentioned combination generates described service chaining strategy is only citing; described in other combinations that are existing or that may occur from now on, the second relevant information generates the mode of described service chaining strategy as being applicable to the present invention; also within scope should being included in, and this is contained at this with way of reference.

In another preferred embodiment (with reference to figure 1), wherein, PCRF equipment 1 also comprises checkout gear (not shown) and the 3rd dispensing device (not shown), wherein, PCEF equipment 2 also comprises the 3rd receiving system (not shown) and the second final controlling element (not shown).Particularly, the checkout gear of PCRF equipment 1 detect whether meet resend described service chaining strategy to described PCEF equipment resend trigger condition; Wherein, resend trigger condition described in and comprise following at least any one :-described PCRF equipment does not receive the control accounting request lastest imformation corresponding with described control accounting request that described PCEF equipment sends;-described PCRF equipment receives reporting with described service chaining policy-related (noun) of described PCEF equipment transmission;-current network condition changes;-current user's situation changes; When resending trigger condition described in meeting, 3rd dispensing device sends to described PCEF equipment and re-authenticates request message, so that described service chaining strategy is resend to described PCEF equipment, wherein, this re-authenticates in request message and comprises the described service chaining strategy corresponding with described service chaining strategy and set up property value pair; Correspondingly, what the 3rd receiving system of PCEF equipment 2 received that described PCRF equipment sends re-authenticates request message, wherein, this re-authenticates in request message the service chaining strategy corresponding with described service chaining strategy comprised in expansion Gx interface and sets up property value pair; Second final controlling element according to described in re-authenticate request message, described service chaining strategy is re-executed to described user data.

Particularly, the checkout gear of PCRF equipment 1 detect whether meet resend described service chaining strategy to described PCEF equipment resend trigger condition, wherein, described in resend trigger condition and comprise following at least any one:

-described PCRF equipment does not receive the control accounting request lastest imformation corresponding with described control accounting request that described PCEF equipment sends;

-described PCRF equipment receives reporting with described service chaining policy-related (noun) of described PCEF equipment transmission;

-current network condition changes;

-current user's situation changes.

Such as, when described resend trigger condition comprise described PCRF equipment do not receive corresponding with the described control accounting request control accounting request lastest imformation that described PCEF equipment sends time, at this, PCEF equipment 2 can send to PCRF equipment 1 and control accounting request lastest imformation (CCR [update]), this transmission can be according to event trigger (as its need for new user's request service chain strategy time, or, the various situation such as when the business that original user is arranged changes), also can be periodic transmission.Such as, when PCEF equipment 2 is after the user data for user A asks corresponding service chaining strategy to PCRF equipment 1, and receive PCRF equipment 1 send service chaining strategy as service-chaining-policy-A1, but PCEF equipment 2 detects needs the user data for new user C to ask corresponding service chaining strategy to PCRF equipment 1, then PCEF equipment 2 have sent CCR [update] to PCRF equipment 1, after the CCR [update] that PCRF equipment 1 receives, checkout gear can judge to meet resend described service chaining strategy to described PCEF equipment 2 resend trigger condition.

For another example, when described resend trigger condition comprise described PCRF equipment receive described PCEF equipment send reporting with described service chaining policy-related (noun) time, at this, described report can be PCEF equipment 2 report sent because the condition meeting predetermined trigger service chaining strategy being detected, the operating result of serving in the current service chain strategy that also can be PCEF equipment 2 send to PCRF equipment 1, as failure and reason-code.Such as, for user A, suppose that PCEF equipment 2 is after the user data for user A asks corresponding service chaining strategy to PCRF equipment 1, and receive PCRF equipment 1 send service chaining strategy as service-chaining-policy-A1, but PCEF equipment 2 finds that such as the service " routing optimality " of second in service-chaining-policy-C of its current service chaining strategy performed performs failure, then PCEF equipment 2 sends such as the service " routing optimality " of second in service-chaining-policy-C of its current service chaining strategy performed to PCRF equipment 1 and performs failed report, after this report that PCRF equipment 1 receives, checkout gear can judge to meet resend described service chaining strategy to described PCEF equipment 2 resend trigger condition.

Then, when resending trigger condition described in meeting, 3rd dispensing device is by expansion Gx interface, send to described PCEF equipment and re-authenticate request message, so that described service chaining strategy is resend to described PCEF equipment, wherein, this re-authenticates in request message and comprises the described service chaining strategy corresponding with described service chaining strategy and set up property value pair.

Such as, when PCEF equipment 2 is after the user data for user A asks corresponding service chaining strategy to PCRF equipment 1, and receive PCRF equipment 1 send service chaining strategy as service-chaining-policy-A1, but detect and need the user data for new user C to ask corresponding service chaining strategy to PCRF equipment 1, then PCEF equipment 2 have sent CCR [update] to PCRF equipment 1, after the CCR [update] that PCRF equipment 1 receives, checkout gear judge to meet resend described service chaining strategy to described PCEF equipment 2 resend trigger condition, then the 3rd dispensing device sends RAR message to PCEF equipment 2, comprise the service chaining strategy corresponding with service chaining strategy service-chaining-policy-A1 in this RAR message and set up AVP.

Correspondingly, 3rd receiving system of PCEF equipment 2 is by expansion Gx interface, what receive the transmission of described PCRF equipment re-authenticates request message, and wherein, this re-authenticates in request message the service chaining strategy corresponding with described service chaining strategy comprised in expansion Gx interface and sets up property value pair.

Second final controlling element according to described in re-authenticate request message, described service chaining strategy is re-executed to described user data.Such as, for user A, the RAR that second final controlling element receives according to the 3rd receiving system, video data about video video-A is re-executed to the service comprised in service chaining strategy service-chaining-policy-A1, namely, after a series of services such as safety detection, routing optimality, distribution 100M bandwidth resources being re-executed to this video data, user A is finally provided it to.

Fig. 3 illustrates a kind of for performing in LTE/EPC based on the PCRF equipment 1 of the strategy of service chaining and the equipment schematic diagram of PCEF equipment 2 of a preferred embodiment of the invention, wherein, PCRF equipment 1 comprises strategy generating device 11 ', first dispensing device 12 ' and the 4th dispensing device 13 ', PCEF equipment 2 comprises first receiving device 21 ', the first final controlling element 22 ', the 4th receiving system 23 ' and delete device 24 '.Particularly, the control accounting request about user data to be supplied that the strategy generating device 11 ' of PCRF equipment 1 sends in response to the PCEF equipment of correspondence, generates corresponding service chaining strategy; First dispensing device 12 ' sets up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, and described service chaining strategy is sent to described PCEF equipment; Correspondingly, the first receiving device 21 ' of PCEF equipment 2 receives the service chaining strategy that corresponding PCRF device responds sends in the control accounting request about user data to be supplied; First final controlling element 22 ' performs described service chaining strategy to described user data; 4th dispensing device 13 ' of PCRF equipment 1 is based on the service chaining strategy delete property value pair in described expansion Gx interface, the deletion information treating deleted service chaining strategy is sent to described PCEF equipment, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising; Correspondingly, 4th receiving system 23 ' of PCEF equipment 2 is based on the service chaining strategy delete property value pair in expansion Gx interface, receive the deletion information treating deleted service chaining strategy that described PCRF equipment sends, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising; Treat the identification information of deleted service chaining strategy described in delete device 24 ' basis, delete corresponding service chaining strategy.At this, the strategy generating device 11 ' of PCRF equipment 1 is identical with the content of the first dispensing device 12 or substantially identical with strategy generating device 11 corresponding in Fig. 1 embodiment respectively with the first dispensing device 12 ', the first receiving device 21 ' of PCEF equipment 2 is identical with the content of the first final controlling element 22 or substantially identical with first receiving device 21 corresponding in Fig. 1 embodiment respectively with the first final controlling element 22 ', for simplicity's sake, therefore do not repeat them here, and be contained in this by reference.

Particularly, 4th dispensing device 13 ' of PCRF equipment 1 is based on the service chaining strategy delete property value pair in described expansion Gx interface, the deletion information treating deleted service chaining strategy is sent to described PCEF equipment, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising.

Such as, suppose that PCRF equipment 1 needs the service chaining strategy of executed (or performing) in deletion or deexcitation PCEF equipment 2 as service-chaining-policy-D, then the 4th dispensing device 13 ' of PCRF equipment 1 based on the service chaining strategy delete property value in described expansion Gx interface to (Service-Chaining-Policy-RemoveAVP), the deletion information treating deleted service chaining strategy is sent to PCEF equipment 2, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising, treat that as comprised the identification information of deleted service chaining strategy service-chaining-policy-D is as " scpD ".

At this, to the service chaining strategy delete property value in expansion Gx interface to being described as follows:

Its form is:

It is packet type that service chaining strategy deletes AVP, and it is also AVP newly-increased in existing Gx interface, and for deexcitation or the strategy deleted about IP-CAN session.Service chaining policy identifier AVP is the reference of deleting predefined service chaining strategy in service chaining strategy in PCEF equipment 2 or deexcitation PCEF equipment 2.

Correspondingly, 4th receiving system 23 ' of PCEF equipment 2 is based on the service chaining strategy delete property value pair in expansion Gx interface, receive the deletion information treating deleted service chaining strategy that described PCRF equipment sends, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising.

Treat the identification information of deleted service chaining strategy described in delete device 24 ' basis, delete corresponding service chaining strategy.Such as, connect example, the comprising of service chaining strategy delete property value centering that 4th receiving system 23 ' of PCEF equipment 2 receives treats that the identification information of deleted service chaining strategy service-chaining-policy-D is as " scpD ", then service chaining strategy service-chaining-policy-D deletes by delete device 24 '.

Fig. 4 illustrates that PCRF equipment according to a further aspect of the present invention and PCEF equipment coordinate and realizes a kind of method flow diagram for performing based on the strategy of service chaining in LTE/EPC.

Particularly, in step sl, the control accounting request about user data to be supplied that PCRF equipment 1 sends in response to the PCEF equipment of correspondence, generates corresponding service chaining strategy; In step s 2, PCRF equipment 1 sets up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, and described service chaining strategy is sent to described PCEF equipment; Correspondingly, PCEF equipment 2 receives the service chaining strategy that corresponding PCRF device responds sends in the control accounting request about user data to be supplied; In step s3, PCEF equipment 2 performs described service chaining strategy to described user data.

Particularly, in step sl, the control accounting request about user data to be supplied that PCRF equipment 1 sends in response to the PCEF equipment of correspondence, generates corresponding service chaining strategy.Such as, suppose user A by its user terminal access IP network as video website etc., to watch video as video-A, this access can be considered IP-CAN session, for this video data (i.e. user data) of user A of giving to be supplied as user-Adata, PCEF equipment 2 have sent the control accounting request about this user data to the PCRF equipment 1 of correspondence, i.e. CC-Request (CCR), then in step sl, PCRF equipment 1 is once receive this CCR, just corresponding service chaining strategy is generated, at this, in step sl, the mode that PCRF equipment 1 generates described service chaining strategy includes but not limited to following at least any one:

Such as, connect example, suppose that network video source such as service-provider-A can provide video video-A, namely also network video source such as service-provider-A is the service provider of video video-A, if it for the predefined service chaining strategy of video video-A is: before video data arrives user, need through safety detection, routing optimality, distribute a series of services such as bandwidth resources, at this, can by this service chaining policy tag position service-chaining-policy-A1, then in step sl, PCRF equipment 1 by call network video source as service-provider-A the application programming interfaces (API) of service chaining policy library that provide, matching inquiry is carried out in this service chaining policy library, obtain the service chaining strategy and service-chaining-policy-A1 that correspond to video video-A.

Such as, suppose user A belong to higher-level user (as its IP address and user data is provided service provider corresponding to network node between close together, its user terminal is by WiFi access network, the set meal rate amount of money is larger, user requires higher to service quality (QoS), belong to particular customer colony etc.), and and user A belong to lower-level user (as its IP address and provide distant between the network node corresponding to the service provider of user data by the user B of access to netwoks video video-A simultaneously, its user terminal is by GPRS access network, set meal rate are minimum amount set meal etc.), then in step sl, PCRF equipment 1 couple of user A and user B, generate different service chaining strategies respectively, service chaining strategy as generated for user A is service-chaining-policy-A2: be supplied to the video data of the video video-A of user A successively through following processing procedure: safety detection, routing optimality, distribute 100M bandwidth resources, network address translation, and be user B generate service chaining strategy be service-chaining-policy-B: be supplied to the video data of the video video-A of user B successively through following processing procedure: safety detection, distribute 10M bandwidth resources.

Preferably, in step sl, also can comprise in the described service chaining strategy that PCRF equipment 1 generates is not by PCEF equipment 2 and TDF (flow detection function, TrafficDetectionFunction) detect some/some services, but this service by PCRF equipment 1 because value-added functionality or other objects force to issue.

Then, in step s 2, PCRF equipment 1 sets up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, and described service chaining strategy is sent to described PCEF equipment.Such as, for user A, in step s 2, PCRF equipment 1 controls charging response (CCA by sending to PCEF equipment 2, CC-Answer) message, this message comprises in expansion Gx interface sets up AVP about the service chaining strategy of service chaining strategy, namely sets up in AVP the service chaining strategy service-chaining-policy-A1 comprised corresponding to video video-A at service chaining strategy, thus service chaining strategy service-chaining-policy-A1 is sent to PCEF equipment 2.

At this, next as follows to described expansion Gx interface specification:

1) service chaining strategy sets up AVP (Service-Chaining-Policy-InstallAVP)

Its form is:

4) service chaining policing rule AVP

Correspondingly, PCEF equipment 2, by the Gx interface of expansion, receives PCRF equipment 1 based on the service chaining strategy about user data to be supplied controlling accounting request transmission.

In step s3, PCEF equipment 2 performs described service chaining strategy to described user data.Such as, for user A, suppose in step s 2, PCEF equipment 2 receives the service chaining strategy service-chaining-policy-A1 corresponding to video video-A, then in step s3, PCEF equipment 2 performs the service comprised in service chaining strategy service-chaining-policy-A1 to the video data about video video-A, after namely performing a series of services such as safety detection, routing optimality, distribution 100M bandwidth resources to this video data, finally provide it to user A.

Constant work between each step of PCRF equipment 1 and PCEF equipment 2.Particularly, in step sl, PCRF equipment 1 continues the control accounting request about user data to be supplied sent in response to the PCEF equipment of correspondence, generates corresponding service chaining strategy; In step s 2, PCRF equipment 1 continues to set up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, and described service chaining strategy is sent to described PCEF equipment; Correspondingly, the service chaining strategy that the PCRF device responds that PCEF equipment 2 continuous reception is corresponding sends in the control accounting request about user data to be supplied; In step s3, PCEF equipment 2 continues to perform described service chaining strategy to described user data.At this, those skilled in the art are to be understood that described " continuing " refers to the generation and transmission and execution of constantly carrying out service chaining strategy between PCRF equipment 1 and each step of PCEF equipment 2 respectively, until PCRF equipment 1 stops generating described service chaining strategy in a long time.

In a preferred embodiment (with reference to figure 4), wherein, the method also comprises step S6 (not shown).Particularly, in step s 6, PCEF equipment 2 sends described control accounting request to described PCRF equipment 1, wherein, comprises the first relevant information of described PCEF equipment in described control accounting request; Wherein, the described first relevant packets of information draws together following at least any one: the current service chaining strategy performed in-described PCEF equipment;-described PCEF equipment is to the event of described PCRF device report; Correspondingly, PCRF equipment 1 receives the described control accounting request that described PCEF equipment 2 sends, and wherein, comprises the first relevant information of described PCEF equipment in described control accounting request; Wherein, in step sl, PCRF equipment 1, in response to described control accounting request, according to described first relevant information, generates described service chaining strategy.

Particularly, in step s 6, PCEF equipment 2 sends described control accounting request to described PCRF equipment 1, wherein, comprises the first relevant information of described PCEF equipment in described control accounting request; Wherein, the described first relevant packets of information draws together following at least any one: the current service chaining strategy performed in-described PCEF equipment;-described PCEF equipment is to the event of described PCRF device report.

Correspondingly, PCRF equipment 1, by the Gx interface of expansion, receives the described control accounting request that described PCEF equipment 2 sends, wherein, comprises the first relevant information of described PCEF equipment in described control accounting request.

Then, in step sl, PCRF equipment 1, in response to described control accounting request, according to described first relevant information, generates described service chaining strategy.

Such as, for user A, suppose PCRF equipment 1 in step s 6, receive the CCR that PCEF equipment 2 sends, the current service chaining strategy performed is comprised in PCEF equipment 2 as service-chaining-policy-C in this CCR, and the execution result information of each service in service chaining strategy service-chaining-policy-C, such as, suppose to comprise following service in service chaining strategy service-chaining-policy-C: safety detection, routing optimality, distribute 100M bandwidth resources, HOST_ID injects, failure is performed to during second service " routing optimality " if perform in service chaining strategy service-chaining-policy-C, then the execution result of second service " routing optimality " also can be sent to PCRF equipment 1 by PCEF equipment 2 in CCR, correspondingly, PCRF equipment 1 also receives in step s 6 in service chaining strategy service-chaining-policy-C and performs failed information to during second service " routing optimality ", because of service chaining strategy service-chaining-policy-C with in the predefined service chaining of the service provider corresponding to video video-A policy library, carry out the service chaining strategy service-chaining-policy-A1 that matching inquiry obtains have identical service, then in step sl, PCRF equipment 1 is in response to CCR, when generating service chaining strategy, failed information can be performed to during second service " routing optimality " according in service chaining strategy service-chaining-policy-C, service in adjustment service chaining strategy service-chaining-policy-A1, as directly skipped or delete service " routing optimality ", generating final service chaining strategy is service-chaining-policy-A3, it comprises following service: safety detection, distribute 100M bandwidth resources.Simultaneously, PCRF equipment 1 performs failed information according to receiving in service chaining strategy service-chaining-policy-C to during second service " routing optimality ", new service chaining strategy can be generated for PCEF equipment 2, and by suitable information as Re-Auth-Request (RAR) by this new service chaining policy distribution to PCEF equipment 2.

Preferably, in step sl, PCRF equipment 1 also can in response to described control accounting request, according to described first relevant information, and the second relevant information, generate described service chaining strategy.At this, the described second relevant packets of information is drawn together but is not limited to as user profile i) stored in user property memory (SPR, Subscriptionprofilerepository); Ii) other network element are (as MME (mobile management entity, MobileManagementEntity), eNB (evolved base station, evolvedNodeB), HSS (home subscriber server, HomeSubscriberServer)) provide about information such as user profile, user profile change, changes in network condition; Iii) information that provides of service provider, as user preference etc.

Such as, connect example, for user A, in step sl, PCRF equipment 1 is first based on described first relevant information, the service chaining strategy generated is service-chaining-policy-A3, it comprises following service: safety detection, distribute 100M bandwidth resources, suppose in step sl, PCRF equipment 1 receives the very poor of current network conditions change from base station, then in step sl, in service chaining strategy service-chaining-policy-A3 the 3rd service " can be distributed 100M bandwidth resources " and be adjusted to " distributing 10M bandwidth resources " by PCRF equipment 1, correspondingly, service chaining strategy after adjustment is service-chaining-policy-A4, it comprises following service: safety detection, distribute 10M bandwidth resources.

In another preferred embodiment (with reference to figure 4), wherein, the method also comprises step S7 (not shown), step S8 (not shown) and step S9 (not shown).Particularly, in the step s 7, PCRF equipment 1 detect whether meet resend described service chaining strategy to described PCEF equipment resend trigger condition, wherein, resend trigger condition described in and comprise following at least any one :-described PCRF equipment does not receive the control accounting request lastest imformation corresponding with described control accounting request that described PCEF equipment sends;-described PCRF equipment receives reporting with described service chaining policy-related (noun) of described PCEF equipment transmission;-current network condition changes;-current user's situation changes; When resending trigger condition described in meeting, in step s 8, PCRF equipment 1 sends to described PCEF equipment and re-authenticates request message, so that described service chaining strategy is resend to described PCEF equipment, wherein, this re-authenticates in request message and comprises the described service chaining strategy corresponding with described service chaining strategy and set up property value pair; Correspondingly, what PCEF equipment 2 received that described PCRF equipment sends re-authenticates request message, and wherein, this re-authenticates in request message the service chaining strategy corresponding with described service chaining strategy comprised in expansion Gx interface and sets up property value pair; In step s 9, PCEF equipment 2 re-authenticates request message according to described, re-executes described service chaining strategy to described user data.

Particularly, in the step s 7, PCRF equipment 1 detect whether meet resend described service chaining strategy to described PCEF equipment resend trigger condition, wherein, described in resend trigger condition and comprise following at least any one:

-current network condition changes;

-current user's situation changes.

Such as, when described resend trigger condition comprise described PCRF equipment do not receive corresponding with the described control accounting request control accounting request lastest imformation that described PCEF equipment sends time, at this, PCEF equipment 2 can send to PCRF equipment 1 and control accounting request lastest imformation (CCR [update]), this transmission can be according to event trigger (as its need for new user's request service chain strategy time, or, the various situation such as when the business that original user is arranged changes), also can be periodic transmission.Such as, when PCEF equipment 2 is after the user data for user A asks corresponding service chaining strategy to PCRF equipment 1, and receive PCRF equipment 1 send service chaining strategy as service-chaining-policy-A1, but PCEF equipment 2 detects needs the user data for new user C to ask corresponding service chaining strategy to PCRF equipment 1, then PCEF equipment 2 have sent CCR [update] to PCRF equipment 1, after the CCR [update] that PCRF equipment 1 receives, in the step s 7, PCRF equipment 1 can judge to meet resend described service chaining strategy to described PCEF equipment 2 resend trigger condition.

For another example, when described resend trigger condition comprise described PCRF equipment receive described PCEF equipment send reporting with described service chaining policy-related (noun) time, at this, described report can be PCEF equipment 2 report sent because the condition meeting predetermined trigger service chaining strategy being detected, the operating result of serving in the current service chain strategy that also can be PCEF equipment 2 send to PCRF equipment 1, as failure and reason-code.Such as, for user A, suppose that PCEF equipment 2 is after the user data for user A asks corresponding service chaining strategy to PCRF equipment 1, and receive PCRF equipment 1 send service chaining strategy as service-chaining-policy-A1, but PCEF equipment 2 finds that such as the service " routing optimality " of second in service-chaining-policy-C of its current service chaining strategy performed performs failure, then PCEF equipment 2 sends such as the service " routing optimality " of second in service-chaining-policy-C of its current service chaining strategy performed to PCRF equipment 1 and performs failed report, after this report that PCRF equipment 1 receives, in the step s 7, PCRF equipment 1 can judge to meet resend described service chaining strategy to described PCEF equipment 2 resend trigger condition.

Then, when resending trigger condition described in meeting, in step s 8, PCRF equipment 1 is by expansion Gx interface, send to described PCEF equipment and re-authenticate request message, to resend to described PCEF equipment by described service chaining strategy, wherein, this re-authenticates in request message and comprises the described service chaining strategy corresponding with described service chaining strategy and set up property value pair.

Such as, when PCEF equipment 2 is after the user data for user A asks corresponding service chaining strategy to PCRF equipment 1, and receive PCRF equipment 1 send service chaining strategy as service-chaining-policy-A1, but detect and need the user data for new user C to ask corresponding service chaining strategy to PCRF equipment 1, then PCEF equipment 2 have sent CCR [update] to PCRF equipment 1, after the CCR [update] that PCRF equipment 1 receives, in the step s 7, PCRF equipment 1 judge to meet resend described service chaining strategy to described PCEF equipment 2 resend trigger condition, then in step s 8, PCRF equipment 1 sends RAR message to PCEF equipment 2, comprise the service chaining strategy corresponding with service chaining strategy service-chaining-policy-A1 in this RAR message and set up AVP.

Correspondingly, PCEF equipment 2 is by expansion Gx interface, what receive the transmission of described PCRF equipment re-authenticates request message, and wherein, this re-authenticates in request message the service chaining strategy corresponding with described service chaining strategy comprised in expansion Gx interface and sets up property value pair.

In step s 9, PCEF equipment 2 re-authenticates request message according to described, re-executes described service chaining strategy to described user data.Such as, for user A, in step s 9, the RAR that PCEF equipment 2 receives in step s 8 according to it, video data about video video-A is re-executed to the service comprised in service chaining strategy service-chaining-policy-A1, namely, after a series of services such as safety detection, routing optimality, distribution 100M bandwidth resources being re-executed to this video data, user A is finally provided it to.

Particularly, in step S1 ', the control accounting request about user data to be supplied that PCRF equipment 1 sends in response to the PCEF equipment of correspondence, generates corresponding service chaining strategy; In step S2 ', PCRF equipment 1 sets up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, and described service chaining strategy is sent to described PCEF equipment; Correspondingly, PCEF equipment 2 receives the service chaining strategy that corresponding PCRF device responds sends in the control accounting request about user data to be supplied; In step S3 ', PCEF equipment 2 performs described service chaining strategy to described user data; In step S4 ', PCRF equipment 1 is based on the service chaining strategy delete property value pair in described expansion Gx interface, the deletion information treating deleted service chaining strategy is sent to described PCEF equipment, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising; Correspondingly, PCEF equipment 2 is based on the service chaining strategy delete property value pair in expansion Gx interface, receive the deletion information treating deleted service chaining strategy that described PCRF equipment sends, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising; In step S5 ', PCEF equipment 2, according to the described identification information treating deleted service chaining strategy, deletes corresponding service chaining strategy.At this, step S1 ', step S2 ' and step S3 ' are identical with the content of step S3 with step S1, step S2 corresponding in Fig. 4 embodiment or substantially identical respectively, for simplicity's sake, therefore do not repeat them here, and are contained in this by reference.

Particularly, in step S4 ', PCRF equipment 1 is based on the service chaining strategy delete property value pair in described expansion Gx interface, the deletion information treating deleted service chaining strategy is sent to described PCEF equipment, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising.

Such as, suppose that PCRF equipment 1 needs the service chaining strategy of executed (or performing) in deletion or deexcitation PCEF equipment 2 as service-chaining-policy-D, then in step S4 ', PCRF equipment 1 based on the service chaining strategy delete property value in described expansion Gx interface to (Service-Chaining-Policy-RemoveAVP), the deletion information treating deleted service chaining strategy is sent to PCEF equipment 2, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising, treat that as comprised the identification information of deleted service chaining strategy service-chaining-policy-D is as " scpD ".

Its form is:

Correspondingly, PCEF equipment 2 is based on the service chaining strategy delete property value pair in expansion Gx interface, receive the deletion information treating deleted service chaining strategy that described PCRF equipment sends, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising.

In step S5 ', PCEF equipment 2, according to the described identification information treating deleted service chaining strategy, deletes corresponding service chaining strategy.Such as, connect example, comprising of the service chaining strategy delete property value centering that PCEF equipment 2 receives in step S4 ' treats that the identification information of deleted service chaining strategy service-chaining-policy-D is as " scpD ", then in step S5 ', service chaining strategy service-chaining-policy-D deletes by PCEF equipment 2.

It should be noted that the present invention can be implemented in the assembly of software and/or software restraint, such as, application-specific integrated circuit (ASIC) (ASIC), general object computer or any other similar hardware device can be adopted to realize.In one embodiment, software program of the present invention can perform to realize step mentioned above or function by processor.Similarly, software program of the present invention (comprising relevant data structure) can be stored in computer readable recording medium storing program for performing, such as, and RAM memory, magnetic or CD-ROM driver or floppy disc and similar devices.In addition, steps more of the present invention or function can adopt hardware to realize, such as, as coordinating with processor thus performing the circuit of each step or function.

In addition, a part of the present invention can be applied to computer program, such as computer program instructions, when it is performed by computer, by the operation of this computer, can call or provide according to method of the present invention and/or technical scheme.And call the program command of method of the present invention, may be stored in fixing or moveable recording medium, and/or be transmitted by the data flow in broadcast or other signal bearing medias, and/or be stored in the working storage of the computer equipment run according to described program command.At this, comprise a device according to one embodiment of present invention, this device comprises the memory for storing computer program instructions and the processor for execution of program instructions, wherein, when this computer program instructions is performed by this processor, trigger this plant running based on the aforementioned method according to multiple embodiment of the present invention and/or technical scheme.

To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.In addition, obviously " comprising " one word do not get rid of other unit or step, odd number does not get rid of plural number.Multiple unit of stating in device claim or device also can be realized by software or hardware by a unit or device.First, second word such as grade is used for representing title, and does not represent any specific order.

Claims

1., for performing the method based on the strategy of service chaining in LTE/EPC, wherein, the method comprises the following steps:

2. method according to claim 1, wherein, the method also comprises:

-described PCRF equipment receives the control accounting request about user data to be supplied that corresponding PCEF equipment sends, wherein, comprises the first relevant information of described PCEF equipment in described control accounting request;

Wherein, described step a comprises:

-described PCRF device responds, in described control accounting request, according to described first relevant information, generates described service chaining strategy;

-set up property value pair based on the service chaining strategy corresponding with described service chaining strategy in expansion Gx interface, described service chaining strategy is sent to described PCEF equipment;

Wherein, the described first relevant packets of information draws together following at least any one:

The current service chaining strategy performed in-described PCEF equipment;

-described PCEF equipment is to the event of described PCRF device report.

3. method according to claim 1 and 2, wherein, the method also comprises:

-described PCRF equipment Inspection whether meet resend described service chaining strategy to described PCEF equipment resend trigger condition;

-when resending trigger condition described in meeting, described PCRF equipment sends to described PCEF equipment and re-authenticates request message, so that described service chaining strategy is resend to described PCEF equipment, wherein, this re-authenticates in request message and comprises the described service chaining strategy corresponding with described service chaining strategy and set up property value pair;

-described PCEF equipment according to described in re-authenticate request message, described service chaining strategy is re-executed to described user data;

Wherein, resend trigger condition described in and comprise following at least any one:

-current network condition changes;

-current user's situation changes.

4. according to the method in any one of claims 1 to 3, wherein, the method also comprises:

-described PCRF equipment is based on the service chaining strategy delete property value pair in described expansion Gx interface, the deletion information treating deleted service chaining strategy is sent to described PCEF equipment, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising;

-described PCEF equipment according to described in treat the identification information of deleted service chaining strategy, delete corresponding service chaining strategy.

5. for performing the PCRF equipment based on the strategy of service chaining in LTE/EPC, wherein, this PCRF equipment comprises:

6. PCRF equipment according to claim 5, wherein, this PCRF equipment also comprises:

Second receiving system, for receiving the described control accounting request that described PCEF equipment sends, wherein, comprises the first relevant information of described PCEF equipment in described control accounting request;

Wherein, described strategy generating device is used for:

-in response to described control accounting request, according to described first relevant information, generate described service chaining strategy;

The current service chaining strategy performed in-described PCEF equipment;

-described PCEF equipment is to the event of described PCRF device report.

7. the PCRF equipment according to claim 5 or 6, wherein, this PCRF equipment also comprises:

Checkout gear, for detect whether meet resend described service chaining strategy to described PCEF equipment resend trigger condition;

3rd dispensing device, for when resending trigger condition described in meeting, send to described PCEF equipment and re-authenticate request message, so that described service chaining strategy is resend to described PCEF equipment, wherein, this re-authenticates in request message and comprises the described service chaining strategy corresponding with described service chaining strategy and set up property value pair;

-current network condition changes;

-current user's situation changes.

8. the PCRF equipment according to any one of claim 5 to 7, wherein, this PCRF equipment also comprises:

4th dispensing device, for based on the service chaining strategy delete property value pair in described expansion Gx interface, the deletion information treating deleted service chaining strategy is sent to described PCEF equipment, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising.

9. for performing the PCEF equipment based on the strategy of service chaining in LTE/EPC, wherein, this PCEF equipment comprises:

10. PCEF equipment according to claim 9, wherein, this PCEF equipment also comprises:

Second dispensing device, for sending described control accounting request to described PCRF equipment, wherein, comprises the first relevant information of described PCEF equipment in described control accounting request;

The current service chaining strategy performed in-described PCEF equipment;

-described PCEF equipment is to the event of described PCRF device report.

11. PCEF equipment according to claim 9 or 10, wherein, this PCEF equipment also comprises:

3rd receiving system, re-authenticate request message for what receive that described PCRF equipment sends, wherein, this re-authenticates in request message the service chaining strategy corresponding with described service chaining strategy comprised in expansion Gx interface and sets up property value pair;

Wherein, this PCEF equipment also comprises:

Second final controlling element, re-authenticates request message for described in basis, re-executes described service chaining strategy to described user data.

12. PCEF equipment according to any one of claim 9 to 11, wherein, this PCEF equipment also comprises:

4th receiving system, for based on the service chaining strategy delete property value pair in expansion Gx interface, receive the deletion information treating deleted service chaining strategy that described PCRF equipment sends, wherein, described service chaining strategy delete property value is to the identification information treating deleted service chaining strategy described in comprising;

Delete device, for treating the identification information of deleted service chaining strategy described in basis, deletes corresponding service chaining strategy.

13. 1 kinds for performing the system based on the strategy of service chaining in LTE/EPC, wherein, this system comprises the PCRF equipment according to any one of claim 5 to 8, and the PCEF equipment according to any one of claim 9 to 12.

14. 1 kinds for perform support software define grid LTE/EPC in based on the system of the strategy of service chaining, wherein, this system comprises the PCRF equipment according to any one of claim 5 to 8, and the PCEF equipment according to any one of claim 9 to 12.