CN100372342C - Method for providing service to circuit field user via group field - Google Patents

Method for providing service to circuit field user via group field Download PDF

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Publication number
CN100372342C
CN100372342C CNB2004100945483A CN200410094548A CN100372342C CN 100372342 C CN100372342 C CN 100372342C CN B2004100945483 A CNB2004100945483 A CN B2004100945483A CN 200410094548 A CN200410094548 A CN 200410094548A CN 100372342 C CN100372342 C CN 100372342C
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user
circuit
business
circuit domain
service
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CNB2004100945483A
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Chinese (zh)
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CN1773967A (en
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施有铸
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华为技术有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q3/00Selecting arrangements
    • H04Q3/0016Arrangements providing connection between exchanges
    • H04Q3/0025Provisions for signalling

Abstract

The present invention relates to a method for integrating a packet switched domain network and a circuit switched domain network, and discloses a method for providing services to users of the switched circuit domain through the packet switched domain, so that users of a fixed network can be directly accessed to an IMS and use IMS service, and the integration of the fixed network and a mobile network and the service reuse are realized. The present invention causes the IMS to support calls intercommunicated with a fixed network circuit switched domain, and the IMS can also provide service for users of the fixed network circuit switched domain through the expansion of the functions of network nodes, such as the MGCF, the S-CSCF, the AS, etc., wherein the MGCF can judge whether the users of the fixed network circuit switched domain of which the signaling path pass through the MGCF contract with the IMS service and triggers an IMS session; the S-CSCF processes sessions and routing control and triggers the AS according to the IMS service contracting information; the AS carries out service control and provides the IMS service for the users of the fixed network circuit switched domain. In addition, the present invention expands the HSS function and is used for storing and managing IMS contracting service data related to the users of the fixed network circuit switched domain.

Description

Provide professional method by packet domain for circuit domain user

Technical field

The present invention relates to the method that packet field network and circuit-domain network merge, particularly provide professional method for circuit domain user by packet domain.

Background technology

The fast development of optical communication technique and broadband Internet protocol (Internet Protocol is called for short " IP ") technology makes the communication trunk network possess powerful application enabling capabilities, and bandwidth no longer has been the main difficulty that operator commences business.But from the development in global telecommunications market, speech and data service market are tending towards saturated day by day, cause operator to begin to face that traffic growth reduces year by year, the predicament of the more and more difficult development of client.Therefore, be that startup carrier or Incumbent are all being sought the new market opportunity and business model, thereby create new business growth point and attract more potential user for it.

Public phone network is because its circuit switching (Circuit Switching, abbreviation " CS ") limitation, limited its professional multifarious development, for the demand of user's mobile service, individual business and multimedia service aspect, public phone network can't satisfy substantially.Simultaneously, the innovation of computer technology and network technology has changed the demand of user to business, only is the integration requirement that public telephone network or internet all can not satisfy user session sound, data, image well.Operator need one based on the next generation network framework, provide the solution of multimedia service of new generation, to create new business growth point.

And existing fixed network circuit domain user provides various based on public switched telephone network (PSTN) (Public Switched Telephone Network by digital SPC exchange and intelligent network for it, " PSTN ") or the business and the IN service of ISDN(Integrated Service Digital Network) (Integrated Services Digital Network, be called for short " ISDN ").On the one hand, owing to call out combining closely of control and professional control, make that service deployment speed is slow, cost is higher; On the other hand, digital SPC exchange and intelligent network can only provide simple circuit domain business, and user's man-machine interaction mode is single, and business experience is relatively poor, and the user uses professional enthusiasm not high, is unfavorable for professional popularization.

Along with the personal mobile communication rapid network development, the mobile network grows in strength gradually, and under the final background that rules all the land of IP network, fixed network next generation network (Next Generation Networks, abbreviation " NGN ") development trend must be to merge with multiple network, such as the fusion of packet domain and circuit domain, the fusion of mobile network and fixed network etc.It is one of current research focus that packet domain and circuit domain merge, 3G (Third Generation) Moblie partner program (3rd Generation Partnership Project wherein, abbreviation " 3GPP ") IP-based IP multimedia subsystem, IMS (the IP based Multimedia Subsystem that proposes in the R5/R6 standard, be called for short " IMS ") be the multimedia mobile network designed system of next-generation full-IP specially promptly, be conceived to carry mobile multi-media service with IP network, it is quicker that operator and terminal use are obtained from the innovation of multimedia service, use more flexibly, thereby increase income for operator, create profit.

IMS is that the 3G mobile network is realized packet voice and grouped data, and the unified multimedia service and the objective network of application are provided.Because being growing more intense of market competition, existing circuit switching system will be eliminated, and the substitute is opening, favorable expandability, purchase the IP-based hardware system also cheaper with maintenance cost.So the beginning of 3GPP system turns to a kind of whole IP-based core network gradually.The 3GPP standard has also more and more been given prominence to the importance of IP framework and has been introduced this notion of IMS, the one, wishing provides traditional circuit switched service (as voice service) by the form of IP, and the 2nd, all multimedia services that provide to the user by this subsystem realization are provided.IMS is to an expansion of packet-switched domain (PacketSwitching is called for short " PS ") core net, is intended to be independent of the PS core net.Adopt the bearer path of IP packet domain as its control signaling and media delivery, adopt Session initiation Protocol (Session Initiation Protocol, abbreviation " SIP ") agreement is as call control signalling, foundation, maintenance and terminated speech and multimedia process have realized that the three that service management, session control and carrying insert separates.

Provide several examples of IMS multimedia traffic below: 1. certain user receives the IP video telephone that another is called in again when answering No. one phone, and this user's decision does not connect this video telephone, but it is transferred to a message leaving system.Subsequently, he will receive a notice that a video messaging is arranged in its mailbox.2. certain user receives the IP video telephone that another is called in again when answering No. one phone, and this new phone is answered in this user's decision, but he wishes can switch in the two-way telephone booth himself.3. certain user is not answering any phone, and he is provided with file the user who revises oneself and transfers other places to those all priority are not high and own unacquainted people's incoming call.But, this user still can receive all Emails and text message in this case, and no matter these mails and information are who issues him.

Fig. 1 shows frame structure and the functional entity of IMS.The frame structure of the IMS of 3GPP definition comprises CSCF (Call Session Control Function, be called for short " CSCF "), MGCF (Media Gateway Control Function, be called for short " MGCF "), IMS media gateway (IMS-Media GateWay, be called for short " IMS-MGW "), Multimedia resource function controller (MRFC) (Mul timedia Resource Function Controller, be called for short " MRFC "), Multimedia resource function processor (MRFP) (Multimedia Resource Function Processor, be called for short " MRFP "), Breakout Gateway Control Function (Breakout Gateway Control Function, be called for short " BGCF "), and IMS application server (Application Server, be called for short " AS ") and home subscriber server functional entitys such as (HomeSubscriber Server are called for short " HSS ").

Wherein CSCF is whole server, supports Session Initiation Protocol treatment S IP session, is divided into inquiry CSCF (Interrogating-CSCF is called for short " I-CSCF ") and serving CSCF (Serving-CSCF is called for short " S-CSCF ") again.Proxy CSCF (Proxy CSCF is called for short " P-CSCF ") is the inlet that subscriber equipment (User Equipment is called for short " UE ") inserts the IMS system, has realized agency (Proxy) and user agent (UserAgent) function in Session Initiation Protocol; MGCF and IMS-MGW are and the functional entity of CS territory and PSTN intercommunication, are responsible for the intercommunication of control signaling and Media Stream respectively; MRFC and MRFP are the functional entitys of realizing Multi-Party Conference, and H.248 the MRFC of control aspect by controlling MRFP; BGCF is the separation of IMS territory and external network, and where interconnected with CS territory or PSTN it is chosen in.

In IMS, business is provided by the application server AS unification, and session control is finished by S-CSCF, and both separate on network configuration fully, and business is toggled to AS by S-CSCF by signatory rule and handles, can collaborative work between a plurality of AS.IMS user inserts IMS by the on-site visit domain node of current location P-CSCF, and session and professional control are always finished by its signatory on-site home domain node, and the session control of IMS and service control function and access are irrelevant.The user contracting data of IMS concentrates among the HSS to be managed.IMS realizes by media gateway controlling node M GCF and the intercommunication calling of fixed network circuit domain: promptly between IMS territory user and the fixed network circuit domain user, and call peer that can be mutual.

With respect to other business, the IMS business has many advantages, support that such as it WEB is self-service, the user can carry out professional self-service management and business customizing very intuitively, as customize multiple business such as intelligent route, CRBT, calling polychrome, task and prompting, distinctive ringing, abbreviated number, dialing restriction, incoming call restriction, simplified the formality of the signatory and RT register traffic of user greatly.In addition, the IMS business support is by certain control agent terminal (as WEB Client mode), on graphical interfaces, click the control operation flow, the user is operation service very intuitively, keep, click and recover, click and shift, click queuing, click operation such as the multiple business of withdrawing from, click connection as click to dial, click on conference, click, simplified the troublesome operation step the when user uses business greatly.

In addition, because IMS is the 3GPP standard is the core net of mobile network definition, the business that provides for the mobile subscriber, if under the situation that the fixed terminal ability allows or under situation about cooperating by certain control agent terminal, be the service of fixed network circuit domain user, realization equipment is reused, save operator's investment, and can bring the new business growth point of fixed network user, and its benefit is self-explantory, therefore the network integration scheme based on IMS is the current research focus.

Based on the network integration scheme purpose of IMS is to make IMS become general-purpose platform based on the SIP session, supports plurality of access modes fixing and that move simultaneously, realizes the fusion of fixed network and mobile network.But at present because technical limitations, IMS can only support the call intercommunication between fixed network circuit domain user and the IMS territory user, can not provide professional for the fixed network circuit domain user by IMS, the fixed network circuit domain user is when intercommunication is called out, and the call signaling route is without IMS AS; And when IMS provided business for it, the call signaling route was toggled to IMS AS by S-CSCF, finished professional control by AS.IMS promptly requires IMS to support that simultaneously various fixedly access waies and mobile access way are the technical barriers of current industry to the support of fixed network NGN.Though the Internet engineering duty group (Internet Engineering TaskForce is adopted in the calling of IMS control, abbreviation " IETF ") Session Initiation Protocol of regulation, but carried out corresponding enhancing and given up at the characteristics that move to insert, be mainly reflected in aspects such as registration, authentication and conversation strategy, the regulation of concrete message flow and IETF has some difference, so the circuit commutative field user will insert IMS and need reformulate session protocol.

In order to offer fixed network circuit domain user business service, the PSTN/ISDN network is realized fixed network user's service access by digital SPC exchange and intelligent network node at present.

This scheme is because calling control and service control function are finished in same network node, and very flexible is unfavorable for professional quick deployment and expansion.The modification of a function may cause the change of another function, has increased potential risks; The deployment of some business and expansion even can cause the upgrading of whole network node, cost is higher, disposes slower.

Secondly, because digital SPC exchange and intelligent network can only provide simple circuit domain business, user's man-machine interaction mode is single, business experience is relatively poor, the user can only use business, business is set by the dialing key mode on fixed terminal, the user need remember miscellaneous service sign indicating number or even operation flow, and the user uses professional enthusiasm not high, is unfavorable for professional popularization.

In addition, though existing IMS provides service management, session control and carrying to insert the mechanism that the three separates, abundant multimedia service based on packet network can be provided, and the network configuration of IMS is also supported fixing mobile fused business, but the IMS standard is only supported to call out with the intercommunication of fixed network circuit domain user, and not supporting provides service application for the fixed network circuit domain user.So when operator has IMS network and fixed network simultaneously, need the overlapping development business to provide IMS business to the fixed network user.

In actual applications, there is following problem in such scheme: directly the network node by circuit domain provides professional scheme cost height, disposes slowly to the fixed network user, and the user uses the interface single, is unfavorable for promoting; Provide professional scheme then to need the overlapping development business by existing IMS network to the fixed network user, can not directly allow the fixed network user insert IMS service, operation cost height.

Cause the main cause of this situation to be, existing fixed network circuit exchange mode underaction, the network facilities is with high costs; And the session protocol that directly inserts to the fixed network user, the service that the fixed network user can't directly use IMS to provide are not provided the IMS network.

Summary of the invention

In view of this, main purpose of the present invention be to provide a kind of by packet domain for circuit domain user provides professional method, make the fixed network user can directly insert IMS, use the IMS service, realize fixed network and mobile network in the fusion of service layer and reuse.

For achieving the above object, the invention provides a kind of by packet domain for circuit domain user provides professional method, comprise following steps,

Judge based on the MGCF in the IP multimedia subsystem, IMS of Internet protocol whether signaling paths has contracted based on the multimedia subsystem business of Internet protocol through the fixed network circuit domain user of this MGCF, if then carry out necessity conversion of signaling message and message content parameter, send the Session initiation Protocol request message to the respective service CSCF;

Described service call conversation control function response is from the Session initiation Protocol request message of MGCF, obtain the laggard guild of the service profile words control of current process object, and send the Session initiation Protocol request message to professional application corresponding server;

Described application server responses is from the Session initiation Protocol request message of described service call conversation control function, described circuit domain user carried out business control after obtaining the service profile of current process object.

Wherein, storage and the relevant CAMEL-Subscription-Information of described fixed network circuit domain user in the home subscriber server of described IP multimedia subsystem, IMS based on Internet protocol, for this based on inquiry of the miscellaneous equipment in the IP multimedia subsystem, IMS of Internet protocol and download.

The telephone number of fixed network circuit domain user described in the described Session initiation Protocol request message adopts Session initiation Protocol uniform resource locator form.

When described circuit domain user was the calling subscriber, described method also comprised following steps,

Circuit-domain network judges according to the CAMEL-Subscription-Information of described circuit domain user whether it has contracted based on the multimedia subsystem business of Internet protocol, if then should call out, and need described IP multimedia subsystem, IMS provide professional control for the calling subscriber based on Internet protocol by circuit-domain network interoffice signaling indication to described MGCF route;

Described MGCF judges that according to described circuit-domain network interoffice signaling the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, is Session initiation Protocol uniform resource locator form by inquiry electronic code server with described circuit domain user number translated, send the Session initiation Protocol request message to the caller service call conversation control function then, wherein comprise and be used to indicate the indication information of this user, and use the calling telephone number of Session initiation Protocol uniform resource locator form for the circuit domain user of signatory IP multimedia subsystem, IMS service based on Internet protocol;

Described caller service call conversation control function response is from the Session initiation Protocol request message of MGCF, judge that according to indication information wherein described user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, obtain described user's service profile by the home subscriber server querying method after session control is carried out in this user's calling, and send the Session initiation Protocol request message to professional application corresponding server, wherein comprise and be used to indicate the indication information of this user for the circuit domain user of signatory IP multimedia subsystem, IMS service based on Internet protocol;

Described application server responses is from the Session initiation Protocol request message of described service call conversation control function, judge that according to indication information wherein described user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, obtain described user's service profile by the home subscriber server querying method after business control is carried out in this user's calling, the Session initiation Protocol request message is returned to described caller service call conversation control function in the back that disposes;

Described caller service call conversation control function continues to handle the business triggering of described circuit domain user or the session of routing addressing after receiving the Session initiation Protocol request message that described application server returns.

When described circuit domain user is the called subscriber, and its exhalation signaling paths has been when having entered described IP multimedia subsystem, IMS based on Internet protocol, and described method also comprises following steps,

On described exhalation signaling paths, the caller service call conversation control function carries out routing addressing to described circuit domain user, is Session initiation Protocol uniform resource locator form by inquiry electronic code server with described circuit domain user number translated, to called service call conversation control function route and send described Session initiation Protocol request message, wherein use the called number of Session initiation Protocol uniform resource locator form then;

Described called service call conversation control function obtains the CAMEL-Subscription-Information of described circuit domain user by the home subscriber server querying method, sends the Session initiation Protocol request message to the corresponding called application server of business;

Described called application server obtains the CAMEL-Subscription-Information of described circuit domain user by described home subscriber server querying method, this circuit domain user is carried out business control, and the Session initiation Protocol request message is returned to described called service call conversation control function in the back that disposes;

Described called service call conversation control function responds described called application server and returns the Session initiation Protocol request message, and business that continue to handle described circuit domain user triggers or based on the multimedia subsystem domain route conversation of Internet protocol;

Described called service call conversation control function is after handling professional triggering and the multimedia subsystem domain route based on Internet protocol, current called described circuit domain user is carried out the circuit domain routing addressing, described circuit domain user number is reverted to original circuit domain form from Session initiation Protocol uniform resource locator form, and it is sent to Breakout Gateway Control Function as called number by the Session initiation Protocol request message, route the call to described circuit-domain network by this Breakout Gateway Control Function.

Described circuit user is the called subscriber, and its described exhalation signaling paths is not when entering described IP multimedia subsystem, IMS based on Internet protocol, and described method comprises following steps,

Circuit-domain network judges according to the CAMEL-Subscription-Information of called described circuit domain user whether it has contracted based on the multimedia subsystem business of Internet protocol, if then should call out, and need described IP multimedia subsystem, IMS provide professional control for the called subscriber based on Internet protocol by circuit-domain network interoffice signaling indication to described MGCF route;

Described MGCF judges that according to described circuit-domain network interoffice signaling the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, is Session initiation Protocol uniform resource locator form by inquiry electronic code server with described circuit domain user number translated, send the Session initiation Protocol request message to the corresponding called service call conversation control function then, wherein use the called number of Session initiation Protocol uniform resource locator form;

Described called service call conversation control function response is from the Session initiation Protocol request message of MGCF, obtain described user's service profile by the home subscriber server querying method after session control is carried out in this user's calling, and send the Session initiation Protocol request message to professional application corresponding server;

Described application server responses is from the Session initiation Protocol request message of described called service call conversation control function, obtain described user's service profile by the home subscriber server querying method after business control is carried out in this user's calling, the Session initiation Protocol request message is returned to described called service call conversation control function in the back that disposes;

Described called service call conversation control function responds the Session initiation Protocol request message that described called application server returns, and business that continue to handle described circuit domain user triggers or based on the multimedia subsystem domain route conversation of Internet protocol;

Described called service call conversation control function is after handling professional triggering and the multimedia subsystem domain route based on Internet protocol, current called described circuit domain user is carried out the circuit domain routing addressing, described circuit domain user number is reverted to original circuit domain form from Session initiation Protocol uniform resource locator form, and it is sent the Session initiation Protocol request message to the outlet gateway control function as called number, route the call to described circuit-domain network by this Breakout Gateway Control Function.

Described electronic code server stores is managed the corresponding relation of described Session initiation Protocol uniform resource locator and described circuit domain user number, and the mutual inquiry service between described Session initiation Protocol uniform resource locator and the described circuit domain user number is provided.

In described Session initiation Protocol request message, by " purpose " parameter expanding in " call information " header field is defined, the indication calling subscriber is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol; In described caller service call conversation control function and described caller application server, by processing, judge that the calling subscriber is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol to " purpose " parameter expanded definition in " call information " header field in the Session initiation Protocol request message of receiving.

In described CAMEL-Subscription-Information, comprise described circuit domain user number information, describedly calledly obtain described circuit domain user number, realize routing addressing handling professional back based on the multimedia subsystem domain of Internet protocol circuit-domain network by described CAMEL-Subscription-Information.

The CAMEL-Subscription-Information of storage administration and described circuit domain user is corresponding in described home subscriber server, comprises the multimedia subsystem business CAMEL-Subscription-Information and the routing iinformation based on Internet protocol of described circuit domain user.

Trigger multimedia subsystem business by public service identity as destination address in the described Session initiation Protocol request message based on Internet protocol.

When described circuit domain user is the calling subscriber, the described following steps that comprise,

Described circuit-domain network judges that according to the CAMEL-Subscription-Information of described circuit domain user it has contracted based on the multimedia subsystem business of Internet protocol, should call out to described MGCF route, and need described IP multimedia subsystem, IMS to provide professional control for the calling subscriber based on Internet protocol by the indication of circuit-domain network interoffice signaling;

Described MGCF judges that according to described circuit-domain network interoffice signaling the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, and obtain corresponding described public service identity according to described CAMEL-Subscription-Information, send the Session initiation Protocol request message to the respective service CSCF then, wherein comprise its service identification of described public affairs;

Described service call conversation control function obtains the described CAMEL-Subscription-Information of described public service identity correspondence by the home subscriber server querying method, send the Session initiation Protocol request message to professional application corresponding server then, wherein comprise described public service identity;

Described application server obtains the described CAMEL-Subscription-Information of described public service identity correspondence by described home subscriber server querying method, described circuit domain user is carried out business control, and the Session initiation Protocol request message is returned to described service call conversation control function in the back that disposes;

Described service call conversation control function continues to manage business and triggers or routing addressing after receiving the Session initiation Protocol request message that described application server returns.

When described circuit domain user is the called subscriber, and its exhalation signaling paths has been when having entered described IP multimedia subsystem, IMS based on Internet protocol, and described method also comprises following steps,

On described exhalation signaling paths, described service call conversation control function carries out routing addressing to described circuit domain user, with the described called described Breakout Gateway Control Function that routes to;

Described Breakout Gateway Control Function is with the described called MGCF that routes to;

Described MGCF is judged the described called business of whether having handled according to handle sign based on the multimedia subsystem business of Internet protocol, if, then with the described called described circuit-domain network that routes to, otherwise judge that the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, and obtain corresponding described public service identity according to described CAMEL-Subscription-Information, send the Session initiation Protocol request message to the respective service CSCF then, wherein comprise and use described public service identity, simultaneously user's the multimedia subsystem business based on Internet protocol is handled flag set;

Described service call conversation control function obtains the described CAMEL-Subscription-Information of described public service identity correspondence by the home subscriber server querying method, send the Session initiation Protocol request message to professional application corresponding server then, wherein comprise described public service identity;

Described application server obtains the described CAMEL-Subscription-Information of described public service identity correspondence by described home subscriber server querying method, described circuit domain user is carried out business control, and the Session initiation Protocol request message is returned to described service call conversation control function in the back that disposes;

Described service call conversation control function continues to manage business and triggers or routing addressing after receiving the Session initiation Protocol request message that described application server returns.

Described circuit user is the called subscriber, and its described exhalation signaling paths do not enter described IP multimedia subsystem, IMS based on Internet protocol, comprises following steps,

Described circuit-domain network judges that according to the CAMEL-Subscription-Information of called described circuit domain user it has contracted based on the multimedia subsystem business of Internet protocol, should call out to described MGCF route, and by circuit-domain network interoffice signaling indication relevant information;

Described MGCF judges that according to described circuit-domain network interoffice signaling the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, and obtain corresponding described public service identity according to described CAMEL-Subscription-Information, send the Session initiation Protocol request message to the respective service CSCF, wherein comprise described public service identity;

Described service call conversation control function obtains the described CAMEL-Subscription-Information of described public service identity correspondence by the home subscriber server querying method, send the Session initiation Protocol request message to professional application corresponding server then, wherein comprise described public service identity;

Described application server obtains the described CAMEL-Subscription-Information of described public service identity correspondence by described home subscriber server querying method, described circuit domain user is carried out business control, and the Session initiation Protocol request message is returned to described service call conversation control function in the back that disposes;

Described service call conversation control function continues to manage business and triggers or routing addressing after receiving the Session initiation Protocol request message that described application server returns.

In described Session initiation Protocol request message, described public service identity carries as destination address mark.

In described Session initiation Protocol request message, described called subscriber's circuit domain user number is carried by message body.

Described eye affair CSCF, described application server obtain described called subscriber's circuit domain user number in the message body of the described Session initiation Protocol request message of receiving, be used for handling the routing addressing of professional back realization to circuit-domain network based on the multimedia subsystem domain of Internet protocol; Also be used for the business control that described application server carries out.

The CAMEL-Subscription-Information of storage administration is corresponding with described public service identity business in described home subscriber server, comprises the caller or the called attribute of described public service identity service contracting data, described public service identity business.Described application server is according to caller in the subscription data of public service identity or called attribute, and judgement is to provide professional control for described caller circuit domain user or described called circuit domain user.

Also comprise following steps,

Described circuit-domain network routes to described MGCF with all-calls;

Described MGCF is to described Call Intercept, judge that by authentication process the user is circuit domain user and signatory multimedia subsystem business based on Internet protocol, if then trigger multi media sub-system conversation, otherwise described calling is back to described circuit-domain network based on Internet protocol.

Also comprise following steps,

Described circuit domain user is dialled called number after directly dialling service access code again, and described circuit-domain network is to described service access code analysis, and described calling is routed to described MGCF;

Described MGCF is to described Call Intercept, judge that by authentication process the user is circuit domain user and signatory multimedia subsystem business based on Internet protocol, if then trigger multi media sub-system conversation, otherwise described calling is back to described circuit-domain network based on Internet protocol.

Also comprise following steps,

In described Session initiation Protocol request message, transmit the relevant information of described circuit domain user by public service identity, described MGCF judge the user for circuit domain user and signatory multimedia subsystem business based on Internet protocol after, according to the service profile of described circuit domain user, obtain corresponding described public service identity.

In circuit-domain network, judge that by Originating Office's switch of described caller circuit domain user or tandem exchange's switch described caller circuit domain user contracted based on the multimedia subsystem business of Internet protocol.Transmit the relevant information of described circuit domain user in described Session initiation Protocol request message by public service identity, described Originating Office switch or tandem exchange's switch are combined into a particular prefix sign indicating number according to described service profile.

In circuit-domain network, judge that by the landing office switch of described called circuit domain user or tandem exchange's switch described called circuit domain user contracted based on the multimedia subsystem business of Internet protocol.Transmit the relevant information of described circuit domain user in described Session initiation Protocol request message by public service identity, described landing office switch or tandem exchange's switch are combined into a particular prefix sign indicating number according to described service profile.

Configuration fixed network attaching position register in circuit-domain network, the calling of described circuit domain user judge by it whether described circuit domain user has contracted based on the multimedia subsystem business of Internet protocol during through described fixed network attaching position register.Transmit the relevant information of described circuit domain user in described Session initiation Protocol request message by public service identity, described fixed network attaching position register is combined into a particular prefix sign indicating number according to described service profile.

The initial address message that the described circuit-domain network interoffice signaling that described circuit-domain network sends to described MGCF is an ISDN(Integrated Service Digital Network) User Part signaling, " called number " parameter of described initial address message increases the particular prefix sign indicating number by described circuit domain user called number to be formed, and is used to indicate described circuit domain user to contract based on the multimedia subsystem business of Internet protocol.

Described MGCF carries out number analysis to described particular prefix sign indicating number after receiving described initial address message, judge whether described circuit domain user has contracted based on the multimedia subsystem business of Internet protocol.In described Session initiation Protocol request message, transmit the relevant information of described circuit domain user by public service identity, described particular prefix sign indicating number is to be generated by the multimedia subsystem business CAMEL-Subscription-Information combination based on Internet protocol of described circuit-domain network according to described circuit domain user, and described MGCF is translated according to described particular prefix sign indicating number and obtained described public service identity.

Described MGCF according to " called number " parameter, obtains described circuit domain user called number after receiving described initial address message.

Described MGCF is when described service call conversation control function route, and the routing relation table of setting by the data configuration mode obtains the routing address of described service call conversation control function.

Described home subscriber server querying method comprises following steps,

Whether described inquiry promoter judges described information to be checked in this locality, if then directly call local information, otherwise inquire about and download described information to be checked to described home subscriber server;

Described inquiry promoter keeps and stores Query Information, and carries out aging update;

Wherein said inquiry promoter is any one in described service call conversation control function, the application server.

By relatively finding, technical scheme difference with the prior art of the present invention is, the present invention makes IMS not only support to call out with the intercommunication of fixed network circuit domain by the expansion to network node functions such as MGCF, S-CSCF, AS, can also provide professional for the fixed network circuit domain user by IMS; Wherein, MGCF can judge signaling paths through the fixed network circuit domain user of MGCF signatory IMS business whether, and triggers the IMS session, S-CSCF handles session, route control, trigger AS according to the IMS service profile, AS then carries out business control to the fixed network circuit domain user, and IMS is provided service; Also expand the HSS function in addition, be used for the storage administration IMS subscription business datum relevant with the fixed network circuit domain user.

Difference on this technical scheme has brought comparatively significantly beneficial effect, promptly adopts IMS for the fixed network circuit domain user provides professional, realizes that business and network are irrelevant, accelerates service deployment and expansion greatly, and it is low to reduce the business customizing cost greatly; IMS improves user interface also for the fixed network circuit domain user brings brand-new business experience simultaneously, and is user-friendly, improves user's enthusiasm, for operator brings new business growth point; Realized that simultaneously fixed network and mobile network reuse and merge operational, cut operating costs.

Description of drawings

Fig. 1 is frame structure and the functional entity schematic diagram of IMS;

Fig. 2 is that user according to an embodiment of the invention triggers the IMS business processing flow;

Fig. 3 is that PSI according to an embodiment of the invention triggers the IMS business processing flow.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

The present invention provides session flow process and the correlation process method that the fixed network user inserts IMS according to fixed network circuit domain and IMS interconnected framework and IMS session processing specification.At first, the fixed network user can be by sip url (Universal Resource Locator in the IMS territory, be called for short " URL ") sign or by its IMS service profile by public service identity (Public Service Identity, be called for short " PSI ") sign, the CAMEL-Subscription-Information of then corresponding user or PSI is downloaded for other functional entity inquiry by the HSS maintenance management.Secondly,, judge by the PSTN network node and to initiate to be transmitted to MGCF then, also can directly be forwarded to MGCF and judge for the whether differentiation of signatory IMS business of fixed network user.After service request enters the IMS territory or itself passes through the IMS territory, judge triggering session by MGCF or S-CSCF, and will talk about the AS that is routed to professional correspondence according to CAMEL-Subscription-Information, by AS the fixed network user is carried out business control, IMS is provided business.After service finishes, can return PSTN by the BGCF route, finish the processing in IMS territory.In this whole process, the Session Initiation Protocol rule is satisfied in the session in IMS territory, but need carry necessary call-related information in the SIP solicited message, perhaps comprises relevant information in CAMEL-Subscription-Information.Realize that thus IMS directly inserts and provide IMS service for the fixed network user.

For according to describing essence of the present invention in detail, provide the feasible embodiment under the multiple situation below.

In one embodiment of the invention, adopt SIP URL, trigger the IMS business processing flow by the user IMS domain identifier fixed network user.Under caller of fixed network circuit domain user and multiple situation such as called, it inserts handling process respectively as shown in Figure 2.

IMS business processing flow when Fig. 2 (a) shows fixed network circuit domain user caller according to an embodiment of the invention.

In step 211, at first, the fixed network circuit domain user makes a call, PSTN judges its IMS business of having contracted according to calling subscriber's service profile, should call out to MGCF route, indicating this calling to MGCF simultaneously is not that intercommunication is called out, but needs IMS to provide professional control for the calling subscriber.In one embodiment of the invention, utilize the PSTN interoffice signaling to transmit this Warning Mark to MGCF.The PSTN interoffice signaling has multiple, in preferred embodiment of the present invention, use the initial address message (InitialAddress Message is called for short " IAM ") in a kind of ISDNYong Hubufen (ISDN User Part is called for short " ISUP ") signaling wherein to describe.Wherein this calling of indication is fixed network user and signatory IMS business in the IAM message.In a preferred embodiment of the present invention, when PSTN sends IAM message to MGCF, increase certain particular prefix sign indicating number by the mandatory parameter in IAM message " called number " and indicate calling subscriber's IMS business of having contracted, need IMS to provide professional control for it.

Then enter step 212, after MGCF receives IAM message, " called number " in the message carried out number analysis, judge calling subscriber's IMS business of having contracted, delete this prefix code simultaneously and obtain real called subscriber PSTN number according to its specific prefix code.Because user ID all is a SIP URL form in the IMS network, and Subscriber Number represents it all is form E.164 among the PSTN, therefore, MGCF needs at first to electronic code server (Electronic Numbermg Server is called for short " ENUM Server ") request rear subscriber number to be translated into SIP URL form from form E.164.Here ENUM Server needs the corresponding transformational relation of storage administration fixed network circuit domain user number field SIP URL.

Enter step 213 then, ENUM Server is translated into SIP URL form with rear subscriber number from form E.164 by configuration querying, and will translate the result and return to MGCF.

Enter step 214 then, MGCF becomes SIP request (INVITE) message with the IAM message translation, and the calling address in the INVITE adopts the SIP URL form after translating.The indication calling subscriber is the fixed network circuit domain user in INVITE simultaneously, the sign of the IMS business of having contracted.In one embodiment of the invention, by " call information " in INVITE (Call-Info) header field parameter " purpose " the expanded definition indication calling subscriber (purpose) in calling subscriber or called subscriber's the additional information is provided is the fixed network circuit domain user and the IMS business of having contracted.MGCF sends to S-CSCF1 with INVITE.(handle the S-CSCF of caller session control here with the S-CSCF1 representative, i.e. originating S-CSCF; The S-CSCF of called session control, i.e. terminating S-CSCF are handled in the S-CSCF2 representative)

Then enter step 215, after S-CSCF1 receives INVITE, handle calling subscriber's session control.Judging the calling subscriber according to the purpose parameter value of Call-Info in the message is the fixed network circuit domain user and the IMS business of having contracted.S-CSCF1 inquires about this user's subscription data if do not exist, and then downloads this user's subscription data to the HSS request.S-CSCF1 (represents it is that business control, i.e. caller AS are carried out in caller with AS1 here according to IMS AS1 of service contracting rule triggering of the user that download obtains; AS2 represents it is to called business control, the promptly called AS of carrying out), S-CSCF1 sends INVITE to this AS1, and still will indicate the calling subscriber in the message is the fixed network circuit domain user and the IMS business of having contracted.

Then enter step 216, when IMS AS1 receives INVITE, judging the calling subscriber according to the purpose parameter value of Call-Info in the message is the fixed network circuit domain user and the IMS business of having contracted.AS1 inquires about this user's subscription data if do not exist, and then downloads this user's subscription data to the HSS request.AS1 downloads the result according to user contracting data, carries out corresponding business control, disposes, and sends INVITE to S-CSCF1.

In step 217, S-CSCF1 receives INVITE at last, continues the calling subscriber is carried out the business triggering or the called subscriber is carried out routing addressing.If continue to have new professional AS to be triggered, then S-CSCF1 sends INVITF message to new AS, and still will indicate the calling subscriber in this message is the fixed network circuit domain user and the IMS business of having contracted, and flow process reenters step 216; Otherwise S-CSCF1 finishes the routing addressing function to the called subscriber.

IMS business processing flow when Fig. 2 (b) shows the called and exhalation path of fixed network circuit domain user according to an embodiment of the invention and enters the IMS territory.

When fixed network circuit domain user of incoming call, incoming call this time needs IMS to provide certain service application control for this called subscriber, and is somebody's turn to do preceding half section that calls out, and the signaling paths of promptly breathing out has entered IMS, calling subscriber's Business Processing finishes, and IMS carries out routing addressing to fixed network circuit domain called subscriber.

At first in step 221, S-CSCF1 carries out routing addressing to fixed network circuit domain called subscriber, and called address is form E.164, then to ENUM Server request called number is translated into SIP URL form from form E.164.

Then enter in the step 222, ENUM Server is translated into SIP URL form with called number from form E.164 by configuration querying, and will translate the result and return to S-CSCF1.

Then enter in the step 223, S-CSCF1 obtains the called number of SIP URL form, sends INVITE to the S-CSCF2 of called home domain, and the called address in the message adopts the SIP URL form after translating.S-CSCF1 is identical with 3GPP IMS standard definition fully to the route addressing method of S-CSCF2, and the present invention no longer describes.

Then enter in the step 224, S-CSCF2 receives INVITE, handles called subscriber's session control.Inquiry called subscriber's subscription data is then downloaded to the HSS request if do not exist, and the user's who obtains according to download service contracting rule triggers an IMS AS2, provides relevant service application control by this AS2 for the called subscriber.S-CSCF2 sends INVITE to this AS2.

Then enter in the step 225, IMS AS2 receives INVITE, and inquiry called subscriber's subscription data is not if exist, then download, and download the result, carry out the professional control of application corresponding according to user contracting data to the HSS request, dispose, send INVITE to S-CSCF2.

Then enter in the step 226, S-CSCF2 receives the INVITE from AS, continues that the called subscriber is carried out business and triggers or routing addressing.If continue to have new professional AS to be triggered, then S-CSCF2 sends INVITE to new AS, and new AS receives INVITE, and flow process reenters step 225.Otherwise S-CSCF2 is to current called subscriber's routing addressing.If the called subscriber does not change because of the business control of AS, S-CSCF2 judges before the called subscriber's who downloads from the HSS request the subscription data and has effectively " circuit domain routing number ", form by " particular prefix sign indicating number "+" called subscriber's PSTN number ", should not need to translate the E.164 called number of form to the ENUMServer request again by " particular prefix sign indicating number " indication S-CSCF2, S-CSCF2 sends to BGCF with called subscriber's PSTN number as the called address in the INVITE, enters step 227.Otherwise S-CSCF2 continues current called subscriber and carries out routing addressing in the IMS territory.

In step 227, after BGCF receives INVITE, route the call to PSTN, flow process is with 3GPP IMS standard definition.Continue the called subscriber is carried out addressing by PSTN

IMS business processing flow when Fig. 2 (C) shows the called and exhalation path of fixed network circuit domain user according to an embodiment of the invention and do not enter the IMS territory.

Fixed network circuit domain user of incoming call, incoming call this time need IMS to provide certain service application control for this called subscriber, and preceding half section of this callings--the signaling paths of promptly breathing out does not have the IMS of process.Flow process is as shown below.

At first in step 231, fixed network circuit domain user of incoming call, PSTN receives IAM message, judge called subscriber's IMS business of having contracted according to called user subscription information, PSTN sends IAM message to MGCF, and the indication called subscriber IMS business of having contracted, in a preferred embodiment of the present invention, when PSTN sends IAM message to MGCF, increase certain particular prefix sign indicating number by the mandatory parameter in IAM message " called number " and indicate called subscriber's IMS business of having contracted, need IMS to provide professional control for it.

Then enter step 232, MGCF receives IAM message, and " called number " in the message carried out number analysis, judges the called subscriber according to its specific prefix code and has contracted after the IMS business, deletes this prefix code and obtains real called subscriber PSTN number.MGCF is translated into SIP URL form with called number from form E.164 to ENUM Server request.

Then enter step 233, ENUM Server is translated into SIP URL form with called number from form E.164 by configuration querying, and will translate the result and return to MGCF.

Then enter step 234, MGCF becomes the SIP INVITE with the IAM message translation, and the called address in the INVITE adopts the SIP URL form after translating.

Then enter step 235, S-CSCF2 receives INVITE, handles called subscriber's session control.Inquiry called subscriber's subscription data is then downloaded to the HSS request if do not exist, and the user's who obtains according to download service contracting rule triggers an IMS AS2, provides relevant service application control by this AS2 for the called subscriber.S-CSCF2 sends INVITE to this AS2.

Then enter step 236, IMS AS2 receives INVITE, and inquiry called subscriber's subscription data is not if exist, then download, and download the result, carry out corresponding business control according to user contracting data to the HSS request, dispose, send INVITE to S-CSCF2.

Then enter step 237, S-CSCF2 receives the INVITE from AS, continues that the called subscriber is carried out business and triggers or routing addressing.If continue to have new professional AS to be triggered, then S-CSCF2 sends INVITE to new AS, and new AS receives INVITE, and flow process reenters step 236.Otherwise S-CSCF2 is to current called subscriber's routing addressing.If the called subscriber does not change because of the business control of AS, S-CSCF2 judges before the called subscriber's who downloads from the HSS request the subscription data and has effectively " circuit domain routing number ", form by " particular prefix sign indicating number "+" called subscriber's PSTN number ", should not need to translate the E.164 called number of form to ENUM Server request again by " particular prefix sign indicating number " indication S-CSCF2, S-CSCF2 sends to BGCF with called subscriber's PSTN number as the called address in the INVITE, enters step 238.Otherwise S-CSCF2 continues current called subscriber and carries out routing addressing in the IMS territory.

In step 238, after BGCF receives INVITE, route the call to PSTN, flow process is with 3GPP IMS standard definition.Continue the called subscriber is carried out addressing by PSTN.

In one embodiment of the invention, MGCF selects a S-CSCF to carry out route by the mode of data configuration, as directly specify certain or certain corresponding S-CSCF of class user in configuration data.

In one embodiment of the invention, judge user's IMS subscription characteristic and pass through message informing MGCF by PSTN by the particular prefix sign indicating number, MGCF carries out number analysis to this prefix code and judges the user and contracted after the IMS business, to ENUM Server request the PSTN number of calling subscriber or called subscriber's E.164 form is translated into SIP URL form.

In another embodiment of the present invention, PSTN does not judge, PSTN unconditionally is routed directly to MGCF with user's calling, provide the subscription authentication processing capacity to Call Intercept by MGCF, the IMS business if the user has contracted, MGCF is translated into SIP URL form to ENUM Server request with the PSTN number of calling subscriber or called subscriber's E.164 form; If not signatory IMS business, MGCF is back to PSTN with calling.

In another embodiment of the present invention, the fixed network circuit domain user is dialled called number after can also directly dialling the IMS service access code again, PSTN carries out number analysis to service access code, route the call to MGCF, provide the subscription authentication processing capacity to Call Intercept by MGCF, the IMS business if the user has contracted, MGCF is translated into SIP URL form to ENUM Server request with the PSTN number of calling subscriber or called subscriber's E.164 form; If not signatory IMS business, MGCF is back to PSTN with calling.

In one embodiment of the invention, by the fixed network circuit domain user effectively " circuit domain routing number " is set in the subscription data of IMS, be to make after IMS handles the business control of called fixed network circuit domain user, calling can enter the PSTN territory called subscriber is carried out addressing.

Those of ordinary skill in the art are appreciated that, except the method for " circuit domain routing number " is set in subscription data, can take IMS that any means makes after the business control of handling called fixed network circuit domain user, S-CSCF can obtain called subscriber's PSTN number again, and route the call to BGCF, realize purpose of the present invention, and do not influence the spirit and scope of the invention.

In one embodiment of the invention, adopt PSI to be designated the IMS business that the fixed network user provides, trigger the IMS business processing flow by PSI.Under caller of fixed network circuit domain user and multiple situation such as called, it inserts handling process respectively as shown in Figure 3.

In the embodiment of SIP URL sign, the remarkable difference of call flow in the IMS territory of caller fixed network circuit domain user and called fixed network circuit domain user is: S-CSCF1 need judge current sessions, caller is the fixed network circuit domain user and the IMS business of having contracted, if user contracting data does not exist just can go for and asks download, this is the expansion to 3GPP IMS standard definition flow process; And S-CSCF2 just can go for and ask download as long as find that called subscription data does not exist, and this meets 3GPP IMS standard definition flow process.And adopt PSI to carry out that IMS is professional to be triggered, can make the definition that the download flow process of the subscription data of the IMS subscription business of caller fixed network circuit domain is also met 3GPP IMS standard.

IMS business processing flow when Fig. 3 (a) shows fixed network circuit domain user caller according to an embodiment of the invention.

In step 311, the fixed network circuit domain user makes a call, PSTN judges its IMS business of having contracted according to calling subscriber's CAMEL-Subscription-Information, IMS service profile according to the calling subscriber is combined into a specific professional prefix code, and should the business prefix code be added in the front of the parameter " called number " in the IAM message, IAM message is sent to MGCF.

Then enter step 312, MGCF receives IAM message, " called number " in the message carried out number analysis, judge calling subscriber's IMS business of having contracted according to its specific professional prefix code, this business prefix code is translated into the PSI of a correspondence, and deletes this prefix code and obtain real called subscriber PSTN number.MGCF becomes INVITE with the IAM message translation, by the IMS standard definition PSI is inserted in the INVITE.In one embodiment of the invention, MGCF inserts other zone in the INVITE with called subscriber PSTN number, the message body (Message body) of carrying such as INVITE.MGCF sends INVITE to S-CSCF2, MGCF obtains the method for S-CSCF2 routing address with 3GPP IMS standard definition.

Then enter step 313, S-CSCF2 receives INVITE, judges whether PSI corresponding service subscription data exists, if do not exist, then downloads to the HSS request.Signatory rule according to download obtains triggers an IMS AS2.S-CSCF2 sends INVITE to AS2

Then enter step 314, AS2 receives INVITE, and called number is taken out in certain specific region from message, and judges whether PSI corresponding service subscription data exists, if do not exist, then downloads to the HSS request.According to the subscription data that download obtains, it is to trigger calling service that this subscription data indicates this calling, and AS2 carries out corresponding business control to the calling subscriber, disposes, and sends INVITE to S-CSCF2.

Then enter step 315, S-CSCF2 receives the INVITE from AS2, continues that PSI is carried out business and triggers or routing addressing.If continue to have new professional AS to be triggered, S-CSCF2 sends INVITE to the AS of new triggering, then enters step 314; If routing addressing, S-CSCF2 certain specific region from message is taken out current called address and is carried out the addressing route.

IMS business processing flow when Fig. 3 (b) shows the called and exhalation path of fixed network circuit domain user according to an embodiment of the invention and enters the IMS territory.

When fixed network circuit domain user of incoming call, incoming call this time needs IMS to provide certain service application control for this called subscriber, and is somebody's turn to do preceding half section that calls out, and the signaling paths of promptly breathing out has entered IMS, calling subscriber's Business Processing finishes, and IMS carries out routing addressing to fixed network circuit domain called subscriber.

At first in step 321, S-CSCF carries out routing addressing to fixed network circuit domain called subscriber, and called address is form E.164, translates failure to ENUM Server request, and S-CSCF will talk about and route to BGCF.

Then in the step 322, BGCF will talk about and route to MGCF.

Then enter in the step 323, MGCF receives INVITE, judge that fixed network circuit domain called subscriber did not also handle the IMS business, then the called subscriber being carried out service authentication handles, the IMS business if the called subscriber has contracted, then MGCF is combined into the PSI of a correspondence according to its concrete service profile; If the not signatory IMS of called subscriber is professional or handled the IMS business, MGCF routes the call to PSTN.MGCF inserts PSI in the INVITE by the IMS standard definition, and called subscriber PSTN number is inserted in the message in other zones.MGCF sends INVITE to S-CSCF2, MGCF obtains the method for S-CSCF2 routing address with 3GPP IMS standard definition.MGCF handled the called subscriber flag set of IMS business simultaneously.

Then enter in the step 324, S-CSCF2 receives INVITE, judges whether the PSI corresponding service subscription data in the To header field exists, if do not exist, then downloads to the HSS request.Signatory rule according to download obtains triggers an IMS AS2.S-CSCF2 sends INVITE to AS2

Then enter in the step 325, AS2 receives INVITE, and called number is taken out in certain specific region from message, and judges whether PSI corresponding service subscription data exists, if do not exist, then downloads to the HSS request.Subscription data (in this subscription data, can indicate this is to trigger called service) according to download obtains carries out corresponding business control to the called subscriber, disposes, and sends INVITE to S-CSCF2.

Then enter in the step 326, S-CSCF2 receives the INVITE from AS2, continues that PSI is carried out business and triggers or routing addressing.If continue to have new professional AS to be triggered, S-CSCF2 sends INVITF message to the AS of new triggering, and flow process enters step 325; If current called address is taken out in routing addressing, S-CSCF2 certain specific region from message body, carry out the addressing route.

IMS business processing flow when Fig. 3 (C) shows the called and exhalation path of fixed network circuit domain user according to an embodiment of the invention and do not enter the IMS territory.

Fixed network circuit domain user of incoming call, incoming call this time need IMS to provide certain service application control for this called subscriber, and preceding half section of this callings---the signaling paths of promptly breathing out does not have the IMS of process.Flow process is as shown below.

At first in step 331, fixed network circuit domain user of incoming call, PSTN receives IAM message, judge its IMS business of having contracted according to called subscriber's CAMEL-Subscription-Information, IMS service profile according to the called subscriber is combined into a specific professional prefix code, and should the business prefix code be added in the front of the parameter " called number " in the IAM message, IAM message is sent to MGCF.

Then enter in the step 332, MGCF receives IAM message, " called number " in the message carried out number analysis, judge called subscriber's IMS business of having contracted according to its specific professional prefix code, this business prefix code is translated into the PSI of a correspondence, and deletes this prefix code and obtain real called subscriber PSTN number.MGCF becomes INVITE with the IAM message translation, by the IMS standard definition PSI is inserted in the INVITE, and called subscriber PSTN number is inserted in other zones of message.MGCF sends INVITE to S-CSCF2, MGCF obtains the method for S-CSCF2 routing address with 3GPP IMS standard definition.

Then enter in the step 333, S-CSCF2 receives INVITE, judges whether PSI corresponding service subscription data exists, if do not exist, then downloads to the HSS request.Signatory rule according to download obtains triggers an IMS AS2.S-CSCF2 sends INVITE to AS2.

Then enter in the step 334, AS2 receives INVITE, and called number is taken out in certain specific region from message, and judges whether PSI corresponding service subscription data exists, if do not exist, then downloads to the HSS request.The subscription data that download obtains indicates this calling to trigger called service, and AS2 carries out corresponding business control to the called subscriber, disposes, and sends INVITE to S-CSCF2.

Then enter in the step 335, S-CSCF2 receives the INVITE from AS, continues that PSI is carried out business and triggers or routing addressing.If continue to have new professional AS to be triggered, S-CSCF2 sends INVITE to the AS of new triggering, and flow process reenters step 334; If routing addressing, S-CSCF2 certain specific region from message body is taken out current called address and is carried out the addressing route.

In one embodiment of the invention, judged user's IMS subscription characteristic and be combined into a professional prefix code by message informing MGCF by PSTN, MGCF should be translated into PSI by the business prefix code.

In another embodiment of the present invention, PSTN does not judge that PSTN unconditionally is routed directly to MGCF with user's calling, provides the subscription authentication processing capacity to Call Intercept by MGCF, the IMS business if the user has contracted, MGCF provides concrete service profile.By this authentication process, the IMS business if MGCF judgement called subscriber has contracted then directly is combined into corresponding PSI according to service profile; If not signatory IMS business, MGCF is back to PSTN with calling.

In another embodiment of the present invention, the fixed network circuit domain user is dialled called number after can also directly dialling the IMS service access code again, PSTN carries out number analysis to service access code, route the call to MGCF, provide the subscription authentication processing capacity to Call Intercept by MGCF, the IMS business if the user has contracted, MGCF provides concrete service profile.By this authentication process, the IMS business if MGCF judgement called subscriber has contracted then directly is combined into corresponding PSI according to service profile; If not signatory IMS business, MGCF is back to PSTN with calling.

In one embodiment of the invention, judging the calling subscriber among the PSTN can be calling subscriber's Originating Office or tandem exchange's switch for IMS subscription user's network node; Judging the called subscriber among the PSTN can be called subscriber's landing office or tandem exchange's switch for IMS subscription user's network node.And in another embodiment of the present invention, then in the PSTN network, disposed fixed network attaching position register (Home Location Register, be called for short " HLR "), when calling out, judge this calling IMS business of contracting by HLR through HLR.

In one embodiment of the invention, the method that entity such as S-CSCF, AS is downloaded CAMEL-Subscription-Information to the HSS inquiry can be a kind of of following mode, S-CSCF etc. do not store the CAMEL-Subscription-Information that download obtains, i.e. i.e. deletion after session discharges, and per call will be downloaded again; Perhaps to the CAMEL-Subscription-Information permanent storage, inquire about earlier before the per call promptly whether this CAMEL-Subscription-Information is stored in this locality, if just do not go HSS to download, still this CAMEL-Subscription-Information is stored in reservation after session discharges; Perhaps adopt data aging mechanism, be about to CAMEL-Subscription-Information and preserve a period of time, if surpass this thresholding (as not having associated call more than 24 hours), then this entity is deleted the local subscription data of preserving.

Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.

Claims (28)

  1. One kind by packet domain for circuit domain user provides professional method, it is characterized in that, comprise following steps,
    Judge based on the MGCF in the IP multimedia subsystem, IMS of Internet protocol whether signaling paths has contracted based on the multimedia subsystem business of Internet protocol through the fixed network circuit domain user of this MGCF, if then carry out necessity conversion of signaling message and message content parameter, send the Session initiation Protocol request message to the respective service CSCF;
    Described service call conversation control function response is from the Session initiation Protocol request message of MGCF, obtain the laggard guild of the service profile words control of current process object, and send the Session initiation Protocol request message to professional application corresponding server;
    Described application server responses is from the Session initiation Protocol request message of described service call conversation control function, described circuit domain user carried out business control after obtaining the service profile of current process object.
  2. 2. the method that business is provided for circuit domain user by packet domain according to claim 1, it is characterized in that, storage and the relevant CAMEL-Subscription-Information of described fixed network circuit domain user in the home subscriber server of described IP multimedia subsystem, IMS based on Internet protocol, for this based on inquiry of the miscellaneous equipment in the IP multimedia subsystem, IMS of Internet protocol and download.
  3. 3. according to claim 2 by packet domain for circuit domain user provides professional method, it is characterized in that the telephone number of fixed network circuit domain user described in the described Session initiation Protocol request message adopts Session initiation Protocol uniform resource locator form.
  4. 4. according to claim 3 by packet domain for circuit domain user provides professional method, it is characterized in that when described circuit domain user was the calling subscriber, described method also comprised following steps,
    Circuit-domain network judges according to the CAMEL-Subscription-Information of described circuit domain user whether it has contracted based on the multimedia subsystem business of Internet protocol, if then should call out, and need described IP multimedia subsystem, IMS provide professional control for the calling subscriber based on Internet protocol by circuit-domain network interoffice signaling indication to described MGCF route;
    Described MGCF judges that according to described circuit-domain network interoffice signaling the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, is Session initiation Protocol uniform resource locator form by inquiry electronic code server with described circuit domain user number translated, send the Session initiation Protocol request message to the caller service call conversation control function then, wherein comprise and be used to indicate the indication information of this user, and use the calling telephone number of Session initiation Protocol uniform resource locator form for the circuit domain user of signatory IP multimedia subsystem, IMS service based on Internet protocol;
    Described caller service call conversation control function response is from the Session initiation Protocol request message of MGCF, judge that according to indication information wherein described user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, obtain described user's service profile by the home subscriber server querying method after session control is carried out in this user's calling, and send the Session initiation Protocol request message to professional application corresponding server, wherein comprise and be used to indicate the indication information of this user for the circuit domain user of signatory IP multimedia subsystem, IMS service based on Internet protocol;
    Described application server responses is from the Session initiation Protocol request message of described service call conversation control function, judge that according to indication information wherein described user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, obtain described user's service profile by the home subscriber server querying method after business control is carried out in this user's calling, the Session initiation Protocol request message is returned to described caller service call conversation control function in the back that disposes;
    Described caller service call conversation control function continues to handle the business triggering of described circuit domain user or the session of routing addressing after receiving the Session initiation Protocol request message that described application server returns.
  5. 5. the method that business is provided for circuit domain user by packet domain according to claim 3, it is characterized in that when described circuit domain user is the called subscriber, and its exhalation signaling paths is when having entered described IP multimedia subsystem, IMS based on Internet protocol, described method also comprises following steps
    On described exhalation signaling paths, the caller service call conversation control function carries out routing addressing to described circuit domain user, is Session initiation Protocol uniform resource locator form by inquiry electronic code server with described circuit domain user number translated, to called service call conversation control function route and send described Session initiation Protocol request message, wherein use the called number of Session initiation Protocol uniform resource locator form then;
    Described called service call conversation control function obtains the CAMEL-Subscription-Information of described circuit domain user by the home subscriber server querying method, sends the Session initiation Protocol request message to the corresponding called application server of business;
    Described called application server obtains the CAMEL-Subscription-Information of described circuit domain user by described home subscriber server querying method, this circuit domain user is carried out business control, and the Session initiation Protocol request message is returned to described called service call conversation control function in the back that disposes;
    Described called service call conversation control function responds described called application server and returns the Session initiation Protocol request message, and business that continue to handle described circuit domain user triggers or based on the multimedia subsystem domain route conversation of Internet protocol;
    Described called service call conversation control function is after handling professional triggering and the multimedia subsystem domain route based on Internet protocol, current called described circuit domain user is carried out the circuit domain routing addressing, described circuit domain user number is reverted to original circuit domain form from Session initiation Protocol uniform resource locator form, and it is sent to Breakout Gateway Control Function as called number by the Session initiation Protocol request message, route the call to described circuit-domain network by this Breakout Gateway Control Function.
  6. 6. the method that business is provided for circuit domain user by packet domain according to claim 3, it is characterized in that described circuit user is the called subscriber, and its described exhalation signaling paths is not when entering described IP multimedia subsystem, IMS based on Internet protocol, described method comprises following steps
    Circuit-domain network judges according to the CAMEL-Subscription-Information of called described circuit domain user whether it has contracted based on the multimedia subsystem business of Internet protocol, if then should call out, and need described IP multimedia subsystem, IMS provide professional control for the called subscriber based on Internet protocol by circuit-domain network interoffice signaling indication to described MGCF route;
    Described MGCF judges that according to described circuit-domain network interoffice signaling the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, is Session initiation Protocol uniform resource locator form by inquiry electronic code server with described circuit domain user number translated, send the Session initiation Protocol request message to the corresponding called service call conversation control function then, wherein use the called number of Session initiation Protocol uniform resource locator form;
    Described called service call conversation control function response is from the Session initiation Protocol request message of MGCF, obtain described user's service profile by the home subscriber server querying method after session control is carried out in this user's calling, and send the Session initiation Protocol request message to professional application corresponding server;
    Described application server responses is from the Session initiation Protocol request message of described called service call conversation control function, obtain described user's service profile by the home subscriber server querying method after business control is carried out in this user's calling, the Session initiation Protocol request message is returned to described called service call conversation control function in the back that disposes;
    Described called service call conversation control function responds the Session initiation Protocol request message that described called application server returns, and business that continue to handle described circuit domain user triggers or based on the multimedia subsystem domain route conversation of Internet protocol;
    Described called service call conversation control function is after handling professional triggering and the multimedia subsystem domain route based on Internet protocol, current called described circuit domain user is carried out the circuit domain routing addressing, described circuit domain user number is reverted to original circuit domain form from Session initiation Protocol uniform resource locator form, and it is sent the Session initiation Protocol request message to the outlet gateway control function as called number, route the call to described circuit-domain network by this Breakout Gateway Control Function.
  7. 7. according to each described method that business is provided for circuit domain user by packet domain in the claim 4 to 6, it is characterized in that, described electronic code server stores is managed the corresponding relation of described Session initiation Protocol uniform resource locator and described circuit domain user number, and the mutual inquiry service between described Session initiation Protocol uniform resource locator and the described circuit domain user number is provided.
  8. 8. the method that business is provided for circuit domain user by packet domain according to claim 4, it is characterized in that, in described Session initiation Protocol request message, by " purpose " parameter expanding in " call information " header field is defined, the indication calling subscriber is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol; In described caller service call conversation control function, application server, by processing, judge that the calling subscriber is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol to " purpose " parameter expanded definition in " call information " header field in the Session initiation Protocol request message of receiving.
  9. 9. according to claim 5 or the 6 described methods that business is provided for circuit domain user by packet domain, it is characterized in that, in described CAMEL-Subscription-Information, comprise described circuit domain user number information, describedly calledly obtain described circuit domain user number, realize routing addressing handling professional back based on the multimedia subsystem domain of Internet protocol circuit-domain network by described CAMEL-Subscription-Information.
  10. 10. according to each described method that business is provided for circuit domain user by packet domain in the claim 4 to 6, it is characterized in that, the CAMEL-Subscription-Information of storage administration and described circuit domain user is corresponding in described home subscriber server, comprises the multimedia subsystem business CAMEL-Subscription-Information and the routing iinformation based on Internet protocol of described circuit domain user.
  11. 11. the method that business is provided for circuit domain user by packet domain according to claim 2, it is characterized in that, in the described Session initiation Protocol request message by public service identity as destination address, and trigger multimedia subsystem business based on Internet protocol.
  12. 12. according to claim 11 by packet domain for circuit domain user provides professional method, it is characterized in that, when described circuit domain user is the calling subscriber, the described following steps that comprise,
    Described circuit-domain network judges that according to the CAMEL-Subscription-Information of described circuit domain user it has contracted based on the multimedia subsystem business of Internet protocol, should call out to described MGCF route, and need described IP multimedia subsystem, IMS to provide professional control for the calling subscriber based on Internet protocol by the indication of circuit-domain network interoffice signaling;
    Described MGCF judges that according to described circuit-domain network interoffice signaling the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, and obtain corresponding described public service identity according to described CAMEL-Subscription-Information, send the Session initiation Protocol request message to the respective service CSCF then, wherein comprise described public service identity;
    Described service call conversation control function obtains the described CAMEL-Subscription-Information of described public service identity correspondence by the home subscriber server querying method, send the Session initiation Protocol request message to professional application corresponding server then, wherein comprise described public service identity;
    Described application server obtains the described CAMEL-Subscription-Information of described public service identity correspondence by described home subscriber server querying method, described circuit domain user is carried out business control, and the Session initiation Protocol request message is returned to described service call conversation control function in the back that disposes;
    Described service call conversation control function continues to manage business and triggers or routing addressing after receiving the Session initiation Protocol request message that described application server returns.
  13. 13. the method that business is provided for circuit domain user by packet domain according to claim 11, it is characterized in that when described circuit domain user is the called subscriber, and its exhalation signaling paths is when having entered described IP multimedia subsystem, IMS based on Internet protocol, described method also comprises following steps
    On described exhalation signaling paths, described service call conversation control function carries out routing addressing to described circuit domain user, with the described called described Breakout Gateway Control Function that routes to;
    Described Breakout Gateway Control Function is with the described called MGCF that routes to;
    Described MGCF is judged the described called business of whether having handled according to handle sign based on the multimedia subsystem business of Internet protocol, if, then with the described called described circuit-domain network that routes to, otherwise judge that the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, and obtain corresponding described public service identity according to described CAMEL-Subscription-Information, send the Session initiation Protocol request message to the respective service CSCF then, wherein comprise and use described public service identity, simultaneously user's the multimedia subsystem business based on Internet protocol is handled flag set;
    Described service call conversation control function obtains the described CAMEL-Subscription-Information of described public service identity correspondence by the home subscriber server querying method, send the Session initiation Protocol request message to professional application corresponding server then, wherein comprise described public service identity;
    Described application server obtains the described CAMEL-Subscription-Information of described public service identity correspondence by described home subscriber server querying method, described circuit domain user is carried out business control, and the Session initiation Protocol request message is returned to described service call conversation control function in the back that disposes;
    Described service call conversation control function continues to manage business and triggers or routing addressing after receiving the Session initiation Protocol request message that described application server returns.
  14. 14. the method that business is provided for circuit domain user by packet domain according to claim 11, it is characterized in that described circuit user is the called subscriber, and its described exhalation signaling paths does not enter described IP multimedia subsystem, IMS based on Internet protocol, comprise following steps
    Described circuit-domain network judges that according to the CAMEL-Subscription-Information of called described circuit domain user it has contracted based on the multimedia subsystem business of Internet protocol, should call out to described MGCF route, and by circuit-domain network interoffice signaling indication relevant information;
    Described MGCF judges that according to described circuit-domain network interoffice signaling the user is circuit domain user and signatory IP multimedia subsystem, IMS service based on Internet protocol, and obtain corresponding described public service identity according to described CAMEL-Subscription-Information, send the Session initiation Protocol request message to the respective service CSCF, wherein comprise described public service identity;
    Described service call conversation control function obtains the described CAMEL-Subscription-Information of described public service identity correspondence by the home subscriber server querying method, send the Session initiation Protocol request message to professional application corresponding server then, wherein comprise described public service identity;
    Described application server obtains the described CAMEL-Subscription-Information of described public service identity correspondence by described home subscriber server querying method, described circuit domain user is carried out business control, and the Session initiation Protocol request message is returned to described service call conversation control function in the back that disposes;
    Described service call conversation control function continues to manage business and triggers or routing addressing after receiving the Session initiation Protocol request message that described application server returns.
  15. 15. according to each described method that business is provided for circuit domain user by packet domain in the claim 12 to 14, it is characterized in that, in described Session initiation Protocol request message, described public service identity carries as destination address mark, and described called subscriber's circuit domain user number is carried by message body.
  16. 16. according to each described method that business is provided for circuit domain user by packet domain in the claim 12 to 14, it is characterized in that, described service call conversation control function, described application server obtain described called subscriber's circuit domain user number in the message body of the described Session initiation Protocol request message of receiving, be used for handling the routing addressing of professional back realization to circuit-domain network based on the multimedia subsystem domain of Internet protocol; Also be used for the business control that described application server carries out.
  17. 17. according to each described method that business is provided for circuit domain user by packet domain in the claim 12 to 14, it is characterized in that, the CAMEL-Subscription-Information of storage administration is corresponding with described public service identity business in described home subscriber server, comprises the caller or the called attribute of described public service identity service contracting data, described public service identity business; Described application server is according to caller in the subscription data of public service identity or called attribute, and judgement is to provide professional control for described caller circuit domain user or described called circuit domain user.
  18. 18. according to claim 2 by packet domain for circuit domain user provides professional method, it is characterized in that, also comprise following steps,
    Described circuit-domain network routes to described MGCF with all-calls;
    Described MGCF is to described Call Intercept, judge that by authentication process the user is circuit domain user and signatory multimedia subsystem business based on Internet protocol, if then trigger multi media sub-system conversation, otherwise described calling is back to described circuit-domain network based on Internet protocol.
  19. 19. according to claim 2 by packet domain for circuit domain user provides professional method, it is characterized in that, also comprise following steps,
    Described circuit domain user pulls out called number after directly pulling out service access code again, and described circuit-domain network is to described service access code analysis, and described calling is routed to described MGCF;
    Described MGCF is to described Call Intercept, judge that by authentication process the user is circuit domain user and signatory multimedia subsystem business based on Internet protocol, if then trigger multi media sub-system conversation, otherwise described calling is back to described circuit-domain network based on Internet protocol.
  20. 20. according to claim 18 or the 19 described methods that business is provided for circuit domain user by packet domain, it is characterized in that, in described Session initiation Protocol request message, transmit the relevant information of described circuit domain user by public service identity, described MGCF judge the user for circuit domain user and signatory multimedia subsystem business based on Internet protocol after, according to the service profile of described circuit domain user, obtain corresponding described public service identity.
  21. 21. according to claim 4 or the 12 described methods that business is provided for circuit domain user by packet domain, it is characterized in that, in circuit-domain network, judge that by Originating Office's switch of described circuit domain user or tandem exchange's switch described circuit domain user contracted based on the multimedia subsystem business of Internet protocol; Transmit the relevant information of described circuit domain user in described Session initiation Protocol request message by public service identity, described Originating Office switch or tandem exchange's switch are combined into a particular prefix sign indicating number according to described service profile.
  22. 22. according to claim 6 or the 14 described methods that business is provided for circuit domain user by packet domain, it is characterized in that, in circuit-domain network, judge that by the landing office switch of described circuit domain user or tandem exchange's switch described circuit domain user contracted based on the multimedia subsystem business of Internet protocol; Transmit the relevant information of described circuit domain user in described Session initiation Protocol request message by public service identity, described landing office switch or tandem exchange's switch are combined into a particular prefix sign indicating number according to described service profile.
  23. 23. according to each described method that business is provided for circuit domain user by packet domain in claim 4 or 6 or 12 or 14, it is characterized in that, configuration fixed network attaching position register in circuit-domain network, the calling of described circuit domain user judges by it whether described circuit domain user has contracted based on the multimedia subsystem business of Internet protocol during through described fixed network attaching position register; Transmit the relevant information of described circuit domain user in described Session initiation Protocol request message by public service identity, described fixed network attaching position register is combined into a particular prefix sign indicating number according to described service profile.
  24. 24. according to each described method that business is provided for circuit domain user by packet domain in claim 4 or 6 or 12 or 14, it is characterized in that, when the described circuit-domain network interoffice signaling that described circuit-domain network sends to described MGCF is the initial address message of ISDN(Integrated Service Digital Network) User Part signaling, " called number " parameter of described initial address message increases the particular prefix sign indicating number by described circuit domain user called number to be formed, and is used to indicate described circuit domain user to contract based on the multimedia subsystem business of Internet protocol.
  25. 25. the method that business is provided for circuit domain user by packet domain according to claim 24, it is characterized in that, described MGCF is after receiving described initial address message, described particular prefix sign indicating number is carried out number analysis, judge whether described circuit domain user has contracted based on the multimedia subsystem business of Internet protocol; In described Session initiation Protocol request message, transmit the relevant information of described circuit domain user by public service identity, described particular prefix sign indicating number is to be generated by the multimedia subsystem business CAMEL-Subscription-Information combination based on Internet protocol of described circuit-domain network according to described circuit domain user, and described MGCF is translated according to described particular prefix sign indicating number and obtained described public service identity.
  26. 26. the method that business is provided for circuit domain user by packet domain according to claim 24, it is characterized in that, described MGCF according to " called number " parameter, obtains described circuit domain user called number after receiving described initial address message.
  27. 27. according to claim 4 or the 6 described methods that business is provided for circuit domain user by packet domain, it is characterized in that, described MGCF is when described service call conversation control function route, and the routing relation table of setting by the data configuration mode obtains the routing address of described service call conversation control function.
  28. 28. according in the claim 4 to 6,12 to 14 each described by packet domain for circuit domain user provides professional method, it is characterized in that described home subscriber server querying method comprises following steps,
    Whether described inquiry promoter judges described information to be checked in this locality, if then directly call local information, otherwise inquire about and download described information to be checked to described home subscriber server;
    Described inquiry promoter keeps and stores Query Information, and carries out aging update;
    Wherein said inquiry promoter is any one in described service call conversation control function, the application server.
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