CN101795282B - Method and system for gracefully closing registration - Google Patents

Abstract

The invention discloses a method and a system for gracefully closing registration. The method comprises the following steps: AGCF carrying the PUI of a corresponding subscriber initiates a graceful registration closing request to the home service calling conversation control function (S-CSCF) of the corresponding subscriber and carries graceful closing state parameters in a registration request signaling; and the S-CSCF transmits the graceful registration closing request carrying the graceful closing state parameters to an AS, and the AS sets the corresponding subscriber as the graceful closing state. The method and the system enable the management mode of the subscriber state to be more efficient and reasonable, optimize the performance of the control level and enhance the perception of the subscriber.

Description

A kind of method and system that realize graceful closing registration

Technical field

The present invention relates to next generation network (NGN, Next Generation Network) IP Multimedia System (IMS, IP Multimedia Subsystem) field, particularly traditional IAD is by a kind of method and system that realize graceful closing registration of AGCF (AGCF, Access Gateway Control Function) access IMS network.

Background technology

IMS is third generation affiliate (3GPP, the subsystem of support IP multimedia service 3rd Generation Partnership Project) proposing at Release5 version, its core feature be adopt session initiation protocol (SIP, Session Initiation Protocol) and with the independence of access.Under the development trend of the network integration, the 3GPP, (ETSI of ETSI, European TelecommunicationsStandards Institute) and the telecommunication standards group (ITU-T of International Telecommunications Union, ITUTelecommunication Standardization Sector) all in the network integration scheme of studying based on IMS, realize fixed network and mobile network and merge (FMC, Fixed Mobile Convergence), thus IMS be considered to the dreamboat framework of NGN.

Soft switch (SS, Soft Switch) concept is progressively to grow up on the basis of IP phone in the later stage nineties 20th century, be communication network by arrowband to broadband transition, by circuit switching to gradual perfection in the process of packet switching evolution.Soft switch has had large-scale application at existing network, and IMS in the industry cycle also obtained clearly as the full-service objective network of FMC, and soft switch is to the IMS evolution trend that is inevitable.

Traditional fixed network access device, as MGCP (MGCP H.248/, Media GatewayControl Protocol) IAD (AG, Access Media Gateway)/residence gateway (RG, Residential media Gateway) equipment, have a kind of special state, be called graceful closed condition.This state is used for being illustrated in all users under this equipment at present in exiting service state, but from generally to exit service state different: old service needs to keep, and new service no longer produces.This state can solve the current user's who is using perception amicably, and has reached the object that new service no longer produces simultaneously.

Current IMS server network element, as application server (AS, Application Server), CSCF (CSCF, Call Session Control Function) in, it is unavailable two kinds that User Status only enters the i.e. available and service of exiting of service, and in prior art, general method is to manage graceful closed condition by AGCF, and in AS and CSCF, only show and enter service state, its implementation as shown in Figure 1:

S101:AG/RG initiates graceful closing registration request in the gracefulness mode of closing;

S102:AGCF User Status is set to graceful closed condition, i.e. old service keeps, and new service no longer produces;

S103:AGCF sends response to AG/RG, represents to accept graceful closing registration request.

Hence one can see that, and final graceful closed condition only embodies in AGCF, and CSCF and AS think that user is still in entering service state.Visible, prior art has following open defect: the first, under IMS network, controlling call flow is all in CSCF and AS, and it is very unreasonable that AGCF controls call flow as access device; The second, in the topological structure schematic diagram of Fig. 2, in AGCF1 side, when the user 1 (USER1) in graceful closed condition is when called, from AS to CSCF, all think that this call service can continue, until this calling is just refused while entering into AGCF, now, this calling has entered very dark level, so efficiency is poor, and because service is not refused in the very first time, user awareness is also poor, from performance perspective, now refuses not preferred plan.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method and system that realize graceful closing registration, with the graceful closed condition of efficient and rational mode leading subscriber, the performance of control plane is optimized more.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides a kind of method that realizes graceful closing registration, the method comprises:

AGCF (AGCF) carries the common identity sign (PUI) of respective user and initiates graceful closing registration request to the home service CSCF (S-CSCF) of respective user, and in this registration request, carries graceful closed condition parameter;

S-CSCF sends the graceful closing registration request of carrying above-mentioned graceful closed condition parameter to application server (AS);

AS respective user is set to graceful closed condition.

In such scheme, the graceful closed condition parameter of carrying in described registration request, be specially: under session initiation protocol (SIP), the header field parameter in registration request or privately owned parameter are expanded, making the Parametric Representation User Status after expansion is graceful closed condition.

In such scheme, described header field parameter in registration request or privately owned parameter are expanded, be specially: the term of validity (expires) parameter in the connection in registration request (Contact) header field is set to 2 ³²=4294967296s, makes it represent that User Status is graceful closed condition.

In such scheme, described AGCF initiates graceful closing registration request to S-CSCF, specifically comprise: AGCF initiates to carry the graceful closing registration request of graceful closed condition parameter to query call conversation control function (I-CSCF), I-CSCF sends the graceful closing registration request of carrying above-mentioned graceful closed condition parameter to user's ownership S-CSCF.

In such scheme, before described I-CSCF sends graceful closing registration request to user's ownership S-CSCF, the method also comprises: I-CSCF is to the ownership S-CSCF information of home subscriber server (HSS) inquiring user, and HSS will belong to S-CSCF information-reply to I-CSCF.

In such scheme, described I-CSCF is after user's ownership S-CSCF sends graceful closing registration request, and the method also comprises:

S-CSCF carries authentication information corresponding to user and passes through authentication to HSS request, after HSS authentication is passed through, replys authentication pass through response to S-CSCF;

S-CSCF replys registration by response to I-CSCF, and I-CSCF replys graceful closing registration by response to AGCF.

In such scheme, before described AGCF initiates graceful closing registration request to S-CSCF, the method also comprises: IAD (AG)/residence gateway (RG) is initiated graceful closing registration request to AGCF, and AGCF replys registration response to described AG/RG.

The present invention also provides a kind of system that realizes graceful closing registration, and this system comprises: AGCF, S-CSCF and AS; Wherein,

AGCF, initiates graceful closing registration request for carrying the PUI of respective user to S-CSCF, carries graceful closed condition parameter in described this request;

S-CSCF, for send graceful closing registration request to AS, carries graceful closed condition parameter in described request;

AS, is set to graceful closed condition for respective user.

In such scheme, this system also comprises: I-CSCF and HSS; Wherein,

I-CSCF, for inquire about the ownership S-CSCF information of described PUI to HSS, and initiates graceful closing registration request to the S-CSCF of respective user ownership, and replys graceful closing registration by response to AGCF;

S-CSCF also passes through authentication for carrying authentication information corresponding to user to HSS request, to I-CSCF, replys registration by responding;

AGCF also passes through response for receiving the graceful closing registration of I-CSCF reply;

HSS, for return to ownership S-CSCF information to I-CSCF, authenticates user's identity, and replys authentication by response to S-CSCF.

In such scheme, this system also comprises: AG/RG, wherein,

AG/RG, for initiate graceful closing registration request to AGCF, and receives the registration response that AGCF replys.

In such scheme, the graceful closed condition parameter of carrying in described registration request, is specially: under Session Initiation Protocol, the header field parameter in registration request or privately owned parameter are expanded, making the Parametric Representation User Status after expansion is graceful closed condition.

In such scheme, described header field parameter in registration request or privately owned parameter are expanded, be specially: the expires parameter in the Contact header field in registration request is set to 2 ³²=4294967296s, makes it represent that User Status is graceful closed condition.

A kind of method and system that realize graceful closing registration provided by the present invention, the PUI that AGCF carries respective user initiates graceful closing registration request to the home service CSCF (S-CSCF) of respective user, and in this registration request, carries graceful closed condition parameter; S-CSCF replys registration by after responding to AGCF, sends the graceful closing registration request of carrying above-mentioned graceful closed condition parameter to AS, and AS replys registration by responding to S-CSCF, and respective user is set to graceful closed condition.

Adopt method and system of the present invention, its advantage is: by IMS server network element control user's graceful closed condition, can be in the new service of very first time refusal, make the way to manage of User Status more efficient and rational, the performance of control plane more optimizes, and improved user's perceptibility.

Accompanying drawing explanation

Fig. 1 is the graceful closing registration method flow of existing techniques in realizing schematic diagram;

Fig. 2 is the calling topological structure schematic diagram in prior art IMS territory;

Fig. 3 is that the present invention realizes graceful closing registration method flow diagram;

Fig. 4 is that the present invention realizes graceful closing registration system composition diagram.

Embodiment

Basic thought of the present invention is: the PUI that AGCF carries respective user initiates graceful closing registration request to the home service CSCF (S-CSCF) of respective user, and in this registration request, carries graceful closed condition parameter; S-CSCF sends the graceful closing registration request of carrying above-mentioned graceful closed condition parameter to AS, AS is set to graceful closed condition to S-CSCF respective user.

The method of the graceful closing registration of realization provided by the invention, as shown in Figure 3, comprises the following steps:

Step 301:AG/RG initiates graceful closing registration request, and AGCF sends registration response to AG/RG;

In this step, user, entered under service state, AG/RG initiates gracefulness to AGCF and closes mode registration request, represents that users all under this AG/RG will enter graceful closed condition, i.e. old calling keeps, new call denial; AGCF receives after the registration request of AG/RG, to AG/RG, sends registration response.

Step 302:AGCF carries the common identity sign of respective user and initiates graceful closing registration request to inquiry CSCF (I-CSCF, Interrogating CSCF), and in this registration request, carries graceful closed condition parameter;

In this step, at the present embodiment, suppose under this AG/RG, to only have a user USER1, public user identity corresponding with this user in IMS territory identifies (PUI, Public User Identifier) be PUI1, AGCF carries this PUI1 and initiates graceful closing registration request to I-CSCF, if also have other users under this AG/RG, AGCF carries PUI corresponding to user and to I-CSCF, initiates graceful closing registration request respectively.In SIP, stipulate that graceful closing registration need be by the realization of registration (Register) demand signalling, the term of validity (expires) parameter in this demand signalling in connection (Contact) header field is used for representing the action of this registration, for example: expires value is 2 ³²the effective range of-1=4294967295s is in duration, can represent that user enters service state.

In this programme, the value of expires parameter is expanded, set: when the value of expires is 2 ³²during=4294967296s, represent that User Status is graceful closed condition, this spreading parameter is referred to as to graceful closed condition parameter; AGCF is carried at this gracefulness closed condition parameter in graceful closing registration request and issues I-CSCF; The common identity sign PUI1 that also comprises respective user in described graceful closing registration request.

Here, not only be confined to the expansion to the expires parameter value of Contact header field, can also be according to actual needs by other privately owned parameters of expansion, or other header field parameters realize, as CSeq header field, Call-ID header field etc., graceful closed condition parameter is carried in graceful closing registration request and issues I-CSCF.

Step 303:I-CSCF is to home service CSCF (S-CSCF, the Serving CSCF) information of home subscriber server (HSS, Home Subscriber Server) inquiry PUI1, and HSS will belong to S-CSCF information-reply to I-CSCF;

Step 304:I-CSCF initiates graceful closing registration request according to belonging to the ownership S-CSCF of S-CSCF information to PUI1, and S-CSCF passes through authentication to HSS request;

In this step, because active user is in entering service state, so passed through user identity legitimacy, authenticate, in the graceful closing registration request that I-CSCF initiates to ownership S-CSCF, carry described user's ID authentication information and graceful closed condition parameter simultaneously; S-CSCF receives after this registration request, carries corresponding authentication information and passes through authentication to HSS request.

Step 305:HSS, by authentication, replys authentication by after responding to S-CSCF, by S-CSCF, to I-CSCF, replys authentication by response;

In this step, after HSS passes through above-mentioned authenticating user identification, to S-CSCF, reply authentication by response, above-mentioned verification process can pass through existing techniques in realizing.

Step 306:I-CSCF replys graceful closing registration by response to AGCF;

Step 307:S-CSCF sends graceful closing registration request to AS;

In this step, in the graceful closing registration demand signalling that S-CSCF sends to AS, carry described graceful closed condition parameter.

Step 308:AS replys graceful closing registration by response to S-CSCF, and respective user is set to graceful closed condition.

Pass through such scheme, user's graceful closed condition is controlled as AS, CSCF by IMS server network element, in IMS core network element, if current respective user PUI1 calls out, when user enters after graceful closed condition, old calling can keep, but new calling is rejected, make the way to manage of User Status more efficient and rational, the performance of control plane more optimizes, and improved user's perceptibility; The present invention program is not limited to traditional access user, also can be applied in all users in all IMS territory.

Based on said method, the present invention also provides a kind of system that realizes graceful closing registration, as shown in Figure 4, comprising: AGCF, S-CSCF and AS; Wherein,

AGCF, initiates graceful closing registration request for the PUI that carries respective user to user's ownership S-CSCF, and in this registration request, carries graceful closed condition parameter;

S-CSCF, for sending graceful closing registration request to AS;

AS, is set to graceful closed condition for respective user.

This system further comprises: AG/RG, for initiate graceful closing registration request to AGCF, and receives the registration response that AGCF replys.

This system also comprises: I-CSCF and HSS; Wherein,

I-CSCF, for inquire about the ownership S-CSCF information of described PUI to HSS, and initiates graceful closing registration request to the S-CSCF of respective user ownership, and replys graceful closing registration by response to AGCF;

S-CSCF also passes through authentication for carrying authentication information corresponding to user to HSS request, to I-CSCF, replys registration by responding;

AGCF also passes through response for receiving the graceful closing registration of I-CSCF reply;

HSS, for return to ownership S-CSCF information to I-CSCF, authenticates user's identity, and replys authentication by response to S-CSCF.

Further, described AGCF comprises: AGCF registration request and response receiver module, AGCF respond module; Wherein,

AGCF registration request and response receiver module, the PUI that carries respective user for AGCF initiates graceful closing registration request to I-CSCF, and in this demand signalling, carries graceful closed condition parameter; Be specially: under Session Initiation Protocol, the header field parameter in this demand signalling is expanded as the expires parameter value of Contact header field, for example, the value arranging as expires is 2 ³²during=4294967296s, represent that User Status is graceful closed condition, and this gracefulness closed condition parameter is carried in this demand signalling and issues I-CSCF; Also can expand according to actual needs other privately owned parameters, or other header field parameters realize, as CSeq header field, Call-ID header field etc., the parameter that represents graceful closed condition is carried in graceful closing registration demand signalling and issues I-CSCF; Also for receiving the graceful closing registration of I-CSCF reply, pass through response;

Module is replied in AGCF response, for AGCF, to AG/RG, replys registration response.

Further, described I-CSCF comprises: module is replied in ownership enquiry module, I-CSCF registration request and response receiver module, I-CSCF response; Wherein,

Ownership enquiry module, the ownership S-CSCF information for I-CSCF to HSS inquiring user;

I-CSCF registration request and response receiver module, initiate graceful closing registration request for I-CSCF to the S-CSCF of user attaching; In described request signaling, carry graceful closed condition parameter; Also for receiving the authentication of S-CSCF reply, pass through response;

I-CSCF registers respond module, and I-CSCF replys graceful closing registration by response to AGCF.

Further, described S-CSCF comprises: module and S-CSCF registration request and response receiver module are replied in authentication request and response receiver module, S-CSCF response; Wherein,

Authentication request and response receiver module, ask by authentication to HSS for S-CSCF, and described S-CSCF carries user's ID authentication information to HSS request by authenticating in signaling; Also for receiving the authentication of HSS reply, pass through response;

Module is replied in S-CSCF response, for S-CSCF, to I-CSCF, replys authentication by response;

S-CSCF registration request and response receiver module, send graceful closing registration request for S-CSCF to AS, and the graceful closing registration that receives AS reply is by response; In described request signaling, carry graceful closed condition parameter.

Further, described AS comprises: AS registers respond module, reply graceful closing registration by response, and respective user is set to graceful closed condition for AS to S-CSCF.

Further, described AG/RG comprises: AG/RG registration request and response receiver module, and for AG/RG, to AGCF, initiate graceful closing registration request, and receive the registration response that AGCF replys.

Further, described HSS comprises: ownership respond module and authentication response module; Wherein,

Ownership respond module, for HSS by user's ownership S-CSCF information-reply to I-CSCF;

Authentication response module, replies to S-CSCF by authentication by response for HSS.

The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.

Claims (8)

1. a method that realizes graceful closing registration, is characterized in that, the method comprises:

The common identity sign PUI that AGCF AGCF carries respective user initiates graceful closing registration request to the home service CSCF S-CSCF of respective user, and the term of validity expires parameter in the header field in registration request is set to 2 ³²=4294967296s, makes described parameter become the parameter that represents that User Status is graceful closed condition;

S-CSCF sends the graceful closing registration request of carrying above-mentioned graceful closed condition parameter to application server AS;

AS respective user is set to graceful closed condition, and described graceful closed condition is specially, and keeps existing business, no longer produces new business.

2. method according to claim 1, it is characterized in that, described AGCF initiates graceful closing registration request to S-CSCF, specifically comprise: AGCF initiates to carry the graceful closing registration request of graceful closed condition parameter to query call conversation control function I-CSCF, I-CSCF sends the graceful closing registration request of carrying above-mentioned graceful closed condition parameter to user's ownership S-CSCF.

3. method according to claim 2, it is characterized in that, before described I-CSCF sends graceful closing registration request to user's ownership S-CSCF, the method also comprises: I-CSCF is to the ownership S-CSCF information of home subscriber server HSS inquiring user, and HSS will belong to S-CSCF information-reply to I-CSCF.

4. method according to claim 2, is characterized in that, described I-CSCF is after user's ownership S-CSCF sends graceful closing registration request, and the method also comprises:

S-CSCF carries authentication information corresponding to user and passes through authentication to HSS request, after HSS authentication is passed through, replys authentication pass through response to S-CSCF;

S-CSCF replys registration by response to I-CSCF, and I-CSCF replys graceful closing registration by response to AGCF.

5. according to the method described in claim 1 to 4 any one, it is characterized in that, before described AGCF initiates graceful closing registration request to S-CSCF, the method also comprises: access gateway AG/residence gateway RG initiates graceful closing registration request to AGCF, and AGCF replys registration response to described AG/RG.

6. a system that realizes graceful closing registration, is characterized in that, this system comprises: AGCF, S-CSCF and AS; Wherein,

AGCF, initiates graceful closing registration request for carrying the PUI of respective user to S-CSCF, and the term of validity expires parameter in the header field in registration request is set to 2 ³²=4294967296s, makes described parameter become the parameter that represents that User Status is graceful closed condition;

S-CSCF, for send graceful closing registration request to AS, carries graceful closed condition parameter in described request;

AS, is set to graceful closed condition for respective user, and described graceful closed condition is specially, and keeps existing business, no longer produces new business.

7. system according to claim 6, is characterized in that, this system also comprises: I-CSCF and HSS; Wherein,

I-CSCF, for inquire about the ownership S-CSCF information of described PUI to HSS, and initiates graceful closing registration request to the S-CSCF of respective user ownership, and replys graceful closing registration by response to AGCF;

S-CSCF also passes through authentication for carrying authentication information corresponding to user to HSS request, to I-CSCF, replys registration by responding;

AGCF also passes through response for receiving the graceful closing registration of I-CSCF reply;

HSS, for return to ownership S-CSCF information to I-CSCF, authenticates user's identity, and replys authentication by response to S-CSCF.

8. system according to claim 6, is characterized in that, this system also comprises: AG/RG, wherein,

AG/RG, for initiate graceful closing registration request to AGCF, and receives the registration response that AGCF replys.

Images