CN104253815A - IMS (IP multimedia subsystem)-based service triggering method and IMS-based service triggering system - Google Patents

Abstract

The invention provides an IMS-based service triggering method, which comprises the following steps: firstly, downloading user subscription data from an HSS (home subscriber server) by an S-CSCF (serving-call-session control function) when UE (user equipment) logins and saving locally, wherein iFC (initial filter criteria) information of subscription contains application server information which needs to be triggered and SPT (service point trigger) conditions for triggering application servers, and SPT contains user service information; secondly, subscribing for the specific service of a user from specific application servers by the S-CSCF after the UE logins successfully, and saving locally the user service information returned by the specific application servers; finally, deciding whether the logics of the application servers are triggered or not according to the matched user service information and SPT conditions after a call request is received by the S-CSCF. The invention also discloses an IMS-based service triggering system. According to the IMS-based service triggering method and the IMS-based service triggering system provided by the invention, the application servers are triggered in a matching manner according to services subscribed by the user, and therefore service triggered logics are enriched, and different demands of operators are met; moreover, the IMS-based service triggering method and the IMS-based service triggering system have no dependency on terminals.

Description

A kind of service trigger method based on IMS system and system

Technical field

The present invention relates to the communications field, relate more specifically to service trigger method and the system of a kind of IMS (IP Multimedia System).

Background technology

IP Multimedia System (IP Multimedia subsystem, IMS) be 3GPP (3rd Generation Partnership Project, third generation partnership) standard of next generation network that defines, its distinguishing feature have employed SIP (Session Initiation Protocol, session initiation protocol) agreement, possess Service control to be separated with bearing capacity, calling is separated with session, application is separated with service, business and network detach, and the multi abilities such as mobile network and internet service fusion.

Fig. 1 is IMS system architecture diagram, primarily of UE (User Equipment, subscriber equipment) (101), IMS core net comprises proxy CSCF (Proxy Call Session Control Function, P-CSCF)/inquire CSCF (Interrogating Call Session Control Function, I-CSCF) (102), serving CSCF (Serving Call Session Control Function, S-CSCF) (103), application server (Application Server, AS) (104), home subscriber server (Home Subscriber Server, HSS) (105) composition.Between each shown network element, UE is connected with P-CSCF by Gm; Realized interconnected between P-CSCF, I-CSCF, S-CSCF by Mw; HSS realizes being connected with I-CSCF, S-CSCF by Cx interface, realizes being connected with AS by Sh interface; S-CSCF is connected with AS by ISC (IMS service control, IMS Service control are called for short ISC) Interface realization.

P-CSCF is as first contact point of user in IMS system, and all SIP signalings, no matter from UE or issue UE, all have to pass through P-CSCF.S-CSCF is the core place of IMS, is positioned at home network, controls and registration service for UE conversates.After UE succeeds in registration in IMS system, S-CSCF preserves the user signing contract information downloaded from HSS in this locality, and S-CSCF realizes according to CAMEL-Subscription-Information the logic triggering application server.

That Fig. 2 describes is user's register flow path figure in IMS system, and it mainly comprises the following steps:

S201, UE send registration request to P-CSCF;

S202 ~ S205, registration request arrives S-CSCF through P-CSCF, I-CSCF;

S206 ~ S216, if S-CSCF needs to carry out authentication to user, so need to obtain user authentication vector to HSS, and according to the Ciphering Key returned in S207 message, structure challenge request (401Unauthorized message), after this challenge request forward to UE, UE constructs challenge responses, after S-CSCF receives S215 challenge responses message, S216 judges the legitimacy of user, completes the certification to user, authentication; If do not need authentication, directly S217 can be performed;

S217 ~ S222, S-CSCF store and download from HSS the user contracting data obtained, and the response and structure succeeds in registration, is transmitted to UE by it by I-CSCF and P-CSCF, thus completes the registration of UE in IMS network;

S223 ~ S225, S-CSCF, according to user signing contract information, send third-party registration request to AS.

Wherein S219 step, S-CSCF is from the CAMEL-Subscription-Information of HSS download user, business trigger filter rule (initial Filter Criteria is contained in CAMEL-Subscription-Information, be called for short iFC), iFC comprises the information of application server AS, and trigger the rule of application server AS, i.e. service point trigger (Service Point Trigger is called for short SPT).The structure and parameter of SPT as shown in Figure 3, called number, SIP method, SIP head field, session status, conversation media description is included in SPT, SPT represents the condition Sum fanction triggering AS, the condition of demand fulfillment coupling SPT, S-CSCF just can trigger corresponding application server, then performs concrete service logic by AS.By existing SPT content, can realize controlling and service detach, the business flexibly that realizes triggers.

Existing SPT content can realize according to information such as called number, SIP head field, session status, determines the logic triggering application server.But under some scene, when S-CSCF triggers application server, need the business of contracting according to user to select to trigger application server.The Call Forwarding Unconditional business such as user has contracted, then S-CSCF needs trigger call filtering server (being the equal of an application server); If or the not signing Call Forwarding Unconditional business of user, then do not need trigger call filtering server.The business cannot contracted according to user in existing SPT structure, match triggers application server, simultaneously S-CSCF does not know that whether user has contracted some business, therefore cannot meet the demand of some networks and operator yet.

Summary of the invention

The technical problem to be solved in the present invention is: overcome the business cannot contracted according to user in SPT structure in prior art, match triggers application server, simultaneously S-CSCF does not know whether user has contracted some business yet, therefore the deficiency of the demand of some networks and operator cannot be met, provide a kind of service trigger method based on IMS system and system, achieve the business of contracting according to user, match triggers application server.

The technical solution adopted for the present invention to solve the technical problems is:

Based on a service trigger method for IMS system, comprise the steps:

Steps A: during user equipment (UE) registration, S-CSCF in IMS core net is from home subscriber server HSS download user subscription data and be kept at this locality, the Application Server information that needs trigger is comprised in business trigger filter Rule Information iFC in subscription data, and trigger the service point trigger SPT trigger condition of application server, comprise user service information in SPT;

After step B:UE succeeds in registration, S-CSCF is to the concrete business of specific application servers booking reader, and user service information specific application servers returned is kept at this locality;

After step C:S-CSCF receives call request, according to match user business information and SPT trigger condition, determine the logic triggering application server.

Further, a kind of service trigger method based on IMS system of the present invention, comprise user service information in SPT described in steps A, this business information is identified by service label, service label identifies different business, and SPT comprises one or more service label.

Further, a kind of service trigger method based on IMS system of the present invention, the specific application servers described in step B refers to the server storing user's signing service information.

Further, a kind of service trigger method based on IMS system of the present invention, the S-CSCF described in step B, to the concrete business of specific application servers booking reader, is according to the service label in SPT, or based on the configuration of this locality.

Further, a kind of service trigger method based on IMS system of the present invention, if the signing service that user or network amendment S-CSCF subscribes to, specific application servers then notifies that the business that S-CSCF user contracts changes.

Further, a kind of service trigger method based on IMS system of the present invention, in described step C, the logic determining to trigger application server is mated in the S-CSCF request received beyond calling equally.

Based on a service triggering system for IMS system, comprise S-CSCF, HSS server, specific application servers, wherein:

S-CSCF, for being user's match user business information and SPT trigger condition, determines the logic triggering application server;

HSS server, for supporting and preserving user contracting data, user contracts the business information contained by support package in SPT, uses SPT to determine business Trigger Logic for S-CSCF;

Specific application servers, for storing the user service information that user provides, when S-CSCF is after its booking reader's business information, is responsible for the business information notifying user.

The technical solution used in the present invention compared with prior art, has following technique effect:

A kind of service trigger method based on IMS system provided by the invention and system, the business of contracting according to user is realized by above step, match triggers application server, controlling under the framework with service detach, enrich the logic that business triggers, achieve and determine whether trigger application server according to signing business, not only meet the demand that operator is different, simultaneously the method to terminal without any dependence.

Accompanying drawing explanation

Fig. 1 is known IMS system architecture diagram.

Fig. 2 is known IMS user's register flow path figure.

Fig. 3 is known IMS network SPT structure and parameter schematic diagram.

Fig. 4 is business trigger flow schematic diagram of the present invention.

Fig. 5 is the IMS network SPT structure and parameter schematic diagram that the present invention improves.

Fig. 6 is the specific embodiment flow chart about registration/subscribing service of the present invention.

Fig. 7 is the specific embodiment flow chart about service trigger method of the present invention.

Embodiment

In order to make those skilled in the art understand technical problem, technical scheme and technique effect in the application better, below in conjunction with the drawings and specific embodiments, a kind of service trigger method based on IMS system of the present invention and system are described in further detail.

The invention provides a kind of service trigger method based on IMS system and system, achieve the business of contracting according to user, match triggers application server.

Fig. 4 is business trigger flow schematic diagram of the present invention, and a kind of service trigger method based on IMS, technical scheme comprises the steps:

When steps A: UE registers, S-CSCF is from HSS download user subscription data and be kept at this locality, comprises the SPT trigger condition of Application Server information that needs trigger and triggering application server, comprise user service information in SPT in signing iFC information.

Further, in described steps A, the business information of user can be comprised in the trigger SPT of service point, the information of business is identified by service label, service label can identify different business, such as Call Forwarding Unconditional, busy the business such as to turn and has different service labels, can comprise one or more service label in SPT.

After step B:UE succeeds in registration, S-CSCF needs the concrete business to specific application servers booking reader, and user service information specific application servers returned is kept at this locality.

Further, in described step B, specific application servers refers to the server knowing user's signing service, such as MMTEL AS (Multimedia Telephony Application Server, mediaphone application server), this application server knows whether user has contracted Call Forwarding Unconditional, and busy is transferred to civilian work business.

Further, in described step B, which business S-CSCF subscribes to specific application servers, and this can according to the service label in SPT, also can based on the configuration of this locality.

Further, in described step B, if after user registration success, the signing service that user/network amendment S-CSCF subscribes to, application server can notify that the business that S-CSCF user contracts changes.As increased/revise/and deleting Call Forwarding Unconditional business, application server all can notify S-CSCF.

After step C:S-CSCF receives call request, according to the content of coupling two aspect, the logic triggering application server can be determined.The S-CSCF concrete business information of contracting according to the user obtained from specific application servers specifically, and download SPT trigger condition the IFC obtained from HSS, carry out mating the logic determining to trigger application server.

Further, in described step C, if require in SPT, user has contracted Call Forwarding Unconditional, triggers certain application server, if so S-CSCF learns the signing Call Forwarding Unconditional business of user, so S-CSCF then can not trigger application server.

Further, described step C, S-CSCF receive the request beyond calling, as the request such as message, subscription can mate the logic determining to trigger application server equally.

Although can terminal extension, allow terminal carry business information, the unreliable information that carries of terminal, be unfavorable for deployment and the development of network on the other hand to terminal excessive demand on the one hand.Therefore the present invention can realize the business of contracting according to user by above step, and match triggers application server, this is a solution of an IMS system, to terminal no requirement (NR).

Fig. 5 is the IMS network SPT structure and parameter schematic diagram that the present invention improves.Service point trigger SPT adds business description on the basis that original called number, SIP method, SIP head field, session status, conversation media describe, business description can be 1 to n service label, each service label certain business corresponding, if Call Forwarding Unconditional service definition is CFU or 001, busy turns service definition CFB or 002.On existing SPT and application service logical relation basis, certain business of having contracted can be realized, then trigger certain application server, or certain business not signing, do not trigger certain application server.

The present invention relates to a kind of business of contracting according to user, the method for match triggers application server.S-CSCF, before triggering application server, needs the information obtaining two aspects: the triggering rule of (1) application server, namely from the SPT content that HSS downloads; (2) business information that the user obtained from specific application service contracts.Fig. 6 is the specific embodiment flow chart about registration/subscribing service of the present invention, and can be obtained the information of two aspects by this flow process, concrete step is as follows:

S601, user initiates IMS registration;

S602, S-CSCF send user's configuring request to HSS;

S603, S-CSCF obtain user's configuration response from HSS, contain iFC, SPT content that user contracts, wherein expand in SPT and contain business description, as Call Forwarding Unconditional business CFU in response message.S-CSCF needs to preserve iFC/SPT information in this locality;

S604, user registration success;

S605, after IMS successful registration, S-CSCF need to know user's signing service specific application servers send Subscrbe request, need in request message expand and carry needs subscription business information, as carried Call Forwarding Unconditional business information.S-CSCF can expand SIP field in asking at Subscrbe, to carry the business information needing to subscribe to.The business information that needs are subscribed to can based on the configuration of this locality or based on business description in SPT;

S606, specific application servers AS return subscription success response, and instruction is subscribed to successfully;

S607, specific application servers AS by Notify message, the business information that notice S-CSCF subscribes to, whether such as this user has contracted Call Forwarding Unconditional business;

S608, S-CSCF send Notify success response to application server.

S609 ~ S611, the business of contracting as user there occurs change, and specific application servers can pass through Notify message, the business information that notice S-CSCF subscribes to, and such as user did not originally have Call Forwarding Unconditional business, had had now Call Forwarding Unconditional business.This step is optional.

By above-mentioned steps, wherein after S603, S-CSCF obtains the triggering rule of application server, i.e. SPT content; After S605 ~ S608, S-CSCF obtains the business information that user contracts.By mating the information of these two aspects, thus determine the logic triggering application server.Fig. 7 is the specific embodiment flow chart about service trigger method of the present invention.

S701, S-CSCF receive call request;

The business information that S702, S-CSCF need match user signing and SPT triggering rule, determine whether trigger certain application server.Such as SPT requires that user has CFU business, then trigger call filtering server, whether now S-CSCF needs according to user's signing service information of obtaining from specific application servers subscribing notification, to have contracted CFU business, needed the information of both couplings by S-CSCF according to user;

S703, S-CSCF, according to matching result, determine the logic triggering application server.As user has contracted CFU business, then trigger call filtering server; CFU business as signing in user, then not trigger call filtering server.

In sum, adopt the inventive method, carry out in SPT content, on the basis of suitably expansion, extending the logic of the business that S-CSCF contracts to specific application server booking reader simultaneously, thus achieve the business that IMS network contracts according to user, the logic of match triggers application server.Enrich the logic that business triggers, meet the demand that operator is different.

The above, be only preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. based on a service trigger method for IMS system, it is characterized in that: comprise the steps:

Steps A: during user equipment (UE) registration, S-CSCF in IMS core net is from home subscriber server HSS download user subscription data and be kept at this locality, the Application Server information that needs trigger is comprised in business trigger filter Rule Information iFC in subscription data, and trigger the service point trigger SPT trigger condition of application server, comprise user service information in SPT;

After step B:UE succeeds in registration, S-CSCF is to the concrete business of specific application servers booking reader, and user service information specific application servers returned is kept at this locality;

After step C:S-CSCF receives call request, according to match user business information and SPT trigger condition, determine the logic triggering application server.

2. a kind of service trigger method based on IMS system according to claim 1, it is characterized in that: in SPT described in steps A, comprise user service information, this business information is identified by service label, and service label identifies different business, and SPT comprises one or more service label.

3. a kind of service trigger method based on IMS system according to claim 1, is characterized in that: the specific application servers described in step B refers to the server storing user's signing service information.

4. a kind of service trigger method based on IMS system according to claim 1, is characterized in that: the S-CSCF described in step B, to the concrete business of specific application servers booking reader, is according to the service label in SPT, or based on the configuration of this locality.

5. a kind of service trigger method based on IMS system according to claim 4, is characterized in that: if the signing service that user or network amendment S-CSCF subscribes to, specific application servers then notifies that the business that S-CSCF user contracts changes.

6. a kind of service trigger method based on IMS system according to claim 1, is characterized in that: in described step C, and the logic determining to trigger application server is mated in the S-CSCF request received beyond calling equally.

7. based on a service triggering system for IMS system, it is characterized in that: comprise S-CSCF, HSS server, specific application servers, wherein:

S-CSCF, for being user's match user business information and SPT trigger condition, determines the logic triggering application server;

HSS server, for supporting and preserving user contracting data, user contracts the business information contained by support package in SPT, uses SPT to determine business Trigger Logic for S-CSCF;

Specific application servers, for storing the user service information that user provides, when S-CSCF is after its booking reader's business information, is responsible for the business information notifying user.