CN1929627B

CN1929627B - Method and system fro realizing public user identification carrying in IMS network

Info

Publication number: CN1929627B
Application number: CN2005100984020A
Authority: CN
Inventors: 文楷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Yingweite SPE limited liability company
Priority date: 2005-09-06
Filing date: 2005-09-06
Publication date: 2012-02-01
Anticipated expiration: 2025-09-06
Also published as: CN1929627A

Abstract

This invention discloses one method to realize common user label in IMS network, which comprises the following steps: main call user starts initial request in IMS network first label for called user; the request is transferred to first label IMS area boundary control function part and the boundary function part gets current second label according to first label; the said boundary control function part processes initial request according to second label. This invention also discloses one communication system.

Description

A kind of method and system that the realization public subscriber identification carries in the IMS network

Technical field

The present invention relates to next-generation communication network, relate in particular to and in the IMS network, realize method and the IMS network system that public subscriber identification carries.

Background technology

The conventional telecommunications net, Public Switched Telephone Network for example, the number that the user uses is in the same place with physical port, equipment and network bound that user terminal uses, and user's position and belong to the number that end office (EO) has determined its use makes number not have mobility.

Number portability service (Number Portability) also claim number portability, belongs to a kind of intelligent business.Along with expanding economy, resident, company's resettlement frequency height, the number portability service role seems more and more important, a lot of international metropolis have all been opened number portability service.On the other hand, the telecommunication bureau in some country, area is fair competition, avoids the user because number is limit and can't be changed the service provider, requires each Virtual network operator that " number carries " business must be provided.

The implementation of number portability service (NP) has multiple, for example, generally realizes that through intelligent network the user has two numbers in this scheme: outwards announce logical number of using and the physical number that determines its ownership place.In the NP of intelligent network solution, generally include following flow process:

1, caller NP is professional: the caller physical number is transformed to the caller logical number, is used for caller ID display and correct charging.Caller NP business is generally automatically inserted access code according to user signing contract information with this user calling by originating switch, delivers to intelligent network platform, and the conversion by intelligent network platform completion calling number continues then.

2, called NP is professional: the called logical FH-number transform that the user is dialed is a called physical number, is used for the addressing to the called subscriber.Called NP is professional, and generally according to user signing contract information access code being inserted in this user's incoming call by called end office delivers to intelligent network platform, continues after the conversion by intelligent platform completion called number again.

The IMS network is the core net of next generation communication network.As core the session control layer fixing and mobile network, become present industry emphasis has been discussed, in 3GPP and TISPAN standard, defined a lot of IMS related specifications.The user of IMS network is natural to have mobility, does not have the binding relationship between physical location and telephone number.

Each IMS user has a private user identity and a public subscriber identification at least.Privately owned sign is specified by the user attaching Virtual network operator; This sign is used to one of home network unique identification signatory, is used in user's registration, authentication; Management; With aspect such as charging, IP multimedia private identity need not come the route sip message, adopts the form of the network access Identifier (NAI) that defines among the RFC2486.

Public subscriber identification is used for request and other telex networks by the user, i.e. indication telephone number in the conventional telecommunications net (like PSTN), and this sign often appears on the business card.IP multimedia pUblic identity adopts SIP URI or TelURI form; Tel URI is in agreement RFC 3966 definition, with URL syntactic representation traditional E .164 number.SIP URI is in agreement RFC 3261 and RFC 2396 definition.

The IMS network uses the registration process of Session Initiation Protocol, realizes that the user inserts the IMS network.In user registration course; The IMS network carries out authentication and sets up the input field escape way to IP multimedia private identity; User registration success will be set up the relation between IP multimedia pUblic identity and this user's current location at home domain S-CSCF; No matter the current registered location of user is at its home domain or is in certain roaming territory, is that called calling can be routed to relevant user terminals with this IP multimedia pUblic identity.Therefore in the IMS network, there is not the restriction that Subscriber Number and on-position are bound mutually in the conventional telecommunications net.

But public subscriber identification carries business demand and still exists at the IMS network, and for example the user does not hope to change because change selected operator the IP multimedia pUblic identity of self.Specify as follows:

The IMS network is the basis with the Session Initiation Protocol, and public subscriber identification is SIP URI.But public subscriber identification form simple table is shown " sip:userdomain "; Domain is a domain name, and there is corresponding domain name in each IMS territory that operator runed, for example; IMS disposes the initial stage; The ABC of operator runs an IMS network, and domain name is " ABC.com ", and Alice is generally " sip:aliceABC.com " at the public subscriber identification of the ABC of operator.Bob calls out Alice; After the S-CSCF of Bob home domain accomplishes the calling service processing for Bob, further forwarding is done in the INVITE request of receiving, S-CSCF is according to the Request-URI (being called subscriber Alice public subscriber identification) of INVITE at this moment; Domain to this SIP URI partly is " ABC.com "; Carry out the DNS inquiry, find the I-CSCF corresponding, and the INVITE request is transmitted to this I-CSCF (the home domain inlet of Alice) with this territory.Foundation is IMS network routing mechanism as above; Requirement operator can be by dns resolution for " domain name " part of each public subscriber identification that the user distributes; And corresponding analysis result corresponds to the I-CSCF address that the IMS of the operator home domain of service is provided for this user, and this defines the domain name part of public subscriber identification.For example, IMS user's public subscriber identification domain name part of the ABC of operator can only be " ABC.com ".Certainly the IMS network runed of the ABC of operator can have a plurality of domain names (these domain names all have record and resolve the I-CSCF of the IMS network that corresponds to the ABC of operator at DNS), and then the domain name part for the public subscriber identification of user's distribution still is confined to these domain names.

Utilize the described signaling process of 3GPP TS23228-670 chapters and sections " 5.11.5.1Session Redirection initiated byS-CSCF to IMS ", can be embodied as IMS user provides transfer class service.As shown in Figure 1; Called home domain is network 2 among the figure; The interrogation-call session control function entity I-CSCF2 of called home domain through with home subscriber server HSS2 mutual after; Be called corresponding business-call session functions entity S-CSCF2 (comprising the registered or unregistered situation of called subscriber), the corresponding service logic that S-CSCF2 contracts according to the user, for example " the Session Forward Unconditional " of having selected; " SessionForward Variable " or " Selective Session Forwarding " etc., it is network 3 that INVTE is routed to a new destination.Utilize this flow process also can carry business for the user provides public subscriber identification, for example, the public subscriber identification that the S-CSCF2 of a called home domain of need contracts according to the user carries professional corresponding information, INVITE is routed to this user's current home network.

Though prior art can realize IMS user's transfer class service (the called public subscriber identification that comprises the user carries business) through the S-CSCF entity in the IMS network, not enough below existing:

1, in processing procedure; The I-CSCF entity is routed to corresponding S-CSCF entity with INVITE always; The S-CSCF entity is treated the public subscriber identification business of carrying as a kind of user's unregistered service; And the S-CSCF entity is need be with HSS mutual and download related data, and its whole service flow process is as good as with normal called subscriber's flow process, can't help this territory and provides and served but in fact register user that public subscriber identification carries.Therefore, its treatment effeciency is lower.

2, the prior art public subscriber identification that only can solve the called subscriber carries, to having the calling subscriber that public subscriber identification carries, and can not be by calling subscriber's wish to by user's display of calling user's former public identify.

Summary of the invention

Main order of the present invention is to solve in the existing IMS network realizing that there is the low problem of treatment effeciency in public subscriber identification when carrying business.

The present invention further solves by prior art can not handle the problem that calling subscriber's public subscriber identification carries, and can not be the problem of user flexibility distributing user sign.

The present invention provides following technical scheme:

A kind of method that the realization public subscriber identification carries in the IMS network comprises the steps:

The calling subscriber is designated calling identification with second and initiates initial request to first sign of called subscriber in the IMS network; The calling subscriber belongs to the network of network entity and finds that said calling subscriber had for first when sign, and the calling identification in the said initial request is revised as first sign;

Said initial request is forwarded to the boundary Control functional entity of the IMS network domains under said called subscriber's first sign, is obtained second sign of the current use of called subscriber according to this first sign by this boundary Control functional entity;

Said boundary Control functional entity is according to said called subscriber's the said initial request of second identification process.

Wherein:

Said boundary Control functional entity is the interrogation-call session control function I-CSCF entity in the IMS network; This I-CSCF entity and home subscriber server HSS are mutual, are obtained corresponding second sign and return to the I-CSCF entity through response message according to user's first sign by this HSS.

If said called subscriber's first is designated the number of SIP URI form; Second when being designated the E.164 number of Tel URI form; The I-CSCF entity is forwarded to the border networks controlled function BGCF entity of this IMS network domains with initial request, by the BGCF entity according to this E.164 number transmit initial request.

If said second is designated the public subscriber identification of SIP URI form, the I-CSCF entity carries out the DNS inquiry according to the domain name part of this public subscriber identification, according to Query Result, initial request is forwarded to the I-CSCF entity of corresponding field.

HSS also carries the treatment type information of the subsequent treatment action of indication I-CSCF entity in said response message.

The I-CSCF entity mails to the affiliated network domains of second sign according to said treatment type with initial request; Perhaps, the I-CSCF entity is according to said treatment type, returns the response message that carries second sign to the forward direction network entity, by said feedforward network entity according to the said initial request of this second identification process.

Address at the corresponding said I-CSCF of domain name mapping result of the domain name part of dns server configuration first sign.

Said calling subscriber and called subscriber's first is designated signatory separately public subscriber identification and carries professional former public subscriber identification, and said calling subscriber and called subscriber's second is designated signatory separately public subscriber identification and carries the public subscriber identification of professional current use.

Said calling subscriber and called subscriber's first sign is respectively the personalized logical identifier of calling subscriber and called subscriber's selection, and calling subscriber and called subscriber's second sign is respectively and belongs to the public subscriber identification of ownership IMS Virtual network operator for this calling subscriber and called subscriber's distribution separately.

A kind of IMS network system comprises:

At least be used to preserve user's first sign and the corresponding relation of second sign, and can return the home subscriber server HSS of second sign to it according to first sign that first network functional entity provides;

Be used for obtaining second sign of the current use of user from said first network functional entity according to first sign of Client-initiated initial request, and according to the I-CSCF entity of the said initial request of this second identification process;

Be used for when the user with first sign when the calling subscriber, and this calling subscriber is when adopting second sign to initiate initial request as calling identification, and the calling identification in the said initial request is revised as first sign; The S-CSCF entity of perhaps indicating said calling subscriber to initiate said initial request with first sign.

Wherein:

After the I-CSCF entity obtains called subscriber's second sign, initial request directly is forwarded to the affiliated network domains of second sign; Perhaps, after the I-CSCF entity obtains said sign, return the response message of the public identify that carries the current use of user, handle said initial request according to the public identify of current use by said feedforward network entity to the forward direction network entity.

Said first is designated the public subscriber identification of having contracted carries professional user's former public subscriber identification, and said second is designated the public subscriber identification of having contracted carries the public subscriber identification of the professional current use of user.

First sign is the personalized logical identifier that the user selects, and second is designated the user belongs to the public subscriber identification that ownership IMS Virtual network operator distributes for this user.Beneficial effect of the present invention is following:

1, the present invention will be forwarded to the IMS network domains that service is provided for the user to user calling/conversation request of having registered the number transfer by the boundary Control functional entity in the IMS network; Need the call/session request be forwarded to no longer and handle for this called IMS network domains of service that provides; Therefore, its treatment effeciency increases substantially than prior art scheme.

2,, can belong to original subscriber's sign that network domains converts the ID of its current use into the hope demonstration the calling subscriber for the calling subscriber who has registered number translated.

3, adopt the conversion of logical identifier and physical label, make operator distribute public identify for the IMS user flexibility.

Description of drawings

Fig. 1 is that prior art realizes the information flow chart that number shifts in the IMS network;

Fig. 2, Fig. 3 are directed against the process chart of IMS called subscriber's former public identify initiation session for the calling subscriber of IMS among the present invention;

Fig. 4 A is the networking sketch map in CS territory and IMS territory;

Fig. 4 B is the flow chart that the calling subscriber in CS territory makes a call to IMS called subscriber's E.164 number;

Fig. 5 A is after IP multimedia pUblic identity converts the E164 number into by SIP URI, the flow chart of the former public identify SIP of calling party URI;

Fig. 5 B is after IP multimedia pUblic identity is SIP URI by the E164 number translated, the flow chart of the former public identify E164 of calling party number;

Fig. 6 carries out the sketch map of subsequent treatment according to the ID of the current use of user for the I-CSCF entity;

Fig. 7 carries out transformation flow figure for the public identify that the public subscriber identification of having contracted is carried professional calling subscriber;

Fig. 8 is for utilizing the sketch map of logical number and public identify routing call among the present invention.

Embodiment

Public subscriber identification carries business in order in the IMS network, to provide efficiently; When the present invention initiates the initial session request the calling subscriber to first sign of called subscriber in the IMS network; The initial session request is forwarded to the border controlled function entities such as I-CSCF entity in the IMS network under first sign, from user data, is obtained second sign of the current use of user according to first sign by this boundary Control functional entity; Then by the boundary Control functional entity according to the said initial session request of said second identification process.Initial session request among the present invention is meant the SIP request of creating session or the SIP request that has nothing to do with session.

In the IMS network of the present invention, carry professional user for the public subscriber identification of having contracted, on HSS, preserve this user related data, comprise the corresponding relation of public identify of user's former public identify and current use in these data.

The present invention expands the LIR/LIA function of the Cx interface between I-CSCF entity and the HSS.

(User Location Query) retrieved in the completing place that is used for alternately of existing LIR/LIA, and specific definition is referring to the associated description of 3GPP TS29228.I-CSCF receives the SIP initial request message of a non-REGISTER, adopts this process to seek S-CSCF.This process need be used Location-Info-Request (LIR) order, and this request comprises following content:

Public user identity: the ID that from the SIP initial request that receives, obtains.

Routing iinformation: be used to locate the information of HSS,, then fill in HSS address (Destination-Host AVP) if I-CSCF knows the HSS address.If I-CSCF does not know the HSS address, then be aiming field (Destination-Realm AVP), request is routed to next Diameter node SLF.

HSS response Location-Info-Answer (LIA) order.Response comprises:

Result: provide the output result indication of LIR order, like successfully still failure.

S-CSCF name or S-CSCF ability: if the user also is not assigned to a S-CSCF name, the latter just is returned; Otherwise the SIP URI of S-CSCF just is returned.

I-CSCF receives LIA, if " result " indication is located successfully, then foundation " S-CSCF title or S-CSCF ability " wherein is forwarded to corresponding S-CSCF with the SIP request.

The present invention, do to further expand to the process of the mutual completing place retrieval that utilizes LIR/LIA:

Information and existing procedure that the LIR request comprises are identical.

Do not have public subscriber identification to carry business like the user, the LIA response is identical with at present.Public subscriber identification carries information if HSS records the user, and then the LIA response comprises following content:

Result: provide result's indication of LIR order, like success or failure.Identical with existing implication.

Public user identity: the public subscriber identification (i.e. second sign) that carries the current use of user that HSS inquires.Public subscriber identification can be SIP URI form or TEL URI form.

I-CSCF treatment type: HSS comprises two types of Forward or Redirect through the subsequent treatment action of this content indication I-CSCF.This is optional content.

In I-CSCF entity and HSS reciprocal process; After HSS obtains the public identify of the current use of user according to the former public identify of the user among the LIR; In the LIA that returns to the I-CSCF entity, carry the public identify of the current use of user, I-CSCF is according to this public identify consumer positioning.This shows that the present invention does not change the basic purposes User Location Query of LIR/LIA, but on existing basis, expand.

The IMS Subscriber Number has SIP URI and two kinds of forms of Tel URI, and simultaneously, public subscriber identification carries and professional divides the user to do that public subscriber identification when called carries and the public subscriber identification when doing caller carries again.Below describe called public subscriber identification earlier in detail and carry business realization to the realization of all kinds of situation.

1, caller, called subscriber are IMS user, and called subscriber's public identify is SIP URI.

(1) user Alice and user Bob are positioned at the different IMS territory; Bob was the user of the ABC of operator originally; Former public identify is bobABC.com, and when Bob has changed the service provider, changing by the UVW of IMS operator provides service; And obtain corresponding public subscriber identification bobUVW.com, but Bob still hopes to keep original IP multimedia pUblic identity bobABC.com.

Consult shown in Figure 2ly, the handling process of former public identify that Alice calls out Bob is following:

Step 1: be positioned at the public identify bobABC.com of the caller Alice in IMS territory 1, call out called Bob to bob.

Step 2:S-CSCF1 according to called identification bobABC.com, sends out INVITE to the IMS of the ABC of operator realm entry I-CSCF2 after accomplishing the Business Processing of caller Alice.

Step 3-4:I-CSCF2 is the S-CSCF that the user provides service with LIR to the HSS inquiry still.HSS is according to the public subscriber identification bobABC.com among the LIR, and Query Database finds that the registered public subscriber identification of user carries business, therefore corresponding ID bobUVW.com is returned to I-CSCF2 in the LIA response.

Step 5:I-CSCF2 finds to have expansion AVP (the Attribute Value Pair that comprises public subscriber identification in the LIA that receives; The structure that is used to the information that transmits in the Diameter); Domain name part according to corresponding public subscriber identification; To the IMS realm entry I-CSCF3 of the UVW of operator, and INVITE mail to I-CSCF3 through dns resolution.

Need not be retained in the call signaling path because of I-CSCF2 is follow-up, in the INVITE that sends, not increase the record-route header field.

Step 6-8: after called Bob replied, 200 responses of INVITE were returned according to the former road of request path.

Step 9-10: caller Alice terminal transmission ACK message shows receives final response.Because of the I-CSCF2 failed call is retained in the subsequent voice calls signaling paths, ACK message is by the through I-CSCF3 of S-CSCF1.The IMS territory of follow-up call signaling and the ABC of operator has no relation.

In above-mentioned flow process; HSS can also respond the subsequent transfer action of indicating I-CSCF through LIA, and I-CSCF knows that the existing public subscriber identification of Bob carries business and just true destination is that transfer action has two types behind the bobUVW.com, and one of which is Forward; Promptly directly to the IMS of the UVW of operator forwarded INVITE (like the flow process of figure); Or Redirect, to sending INVITE side's loopback 300 responses, its handling process is as shown in Figure 3:

Step 1-4: the flow process of describing with figure is identical.

Step 5-6:I-CSCF2 is after receiving LIA, and according to indication, to INVITE loopback 300 responses, the Contact header field of this response message carries the public identify bobUVW.com of the current use of bob.

After step 7-8:300 response arrived calling terminal, calling terminal sent the ACK message authentication and receives final response.

Step 9-10: calling terminal sends INVITE according to the public identify bobUVW.com in 300 responses to bob.

The transfer action type of HSS indication I-CSCF, the relevant information that can be used as user's public subscriber identification business of carrying is registered at HSS.

(2) caller Alice and called Bob are the IMS users of the ABC of operator, and Bob change service provider is the UVW of operator, and the flow process of describing among the signaling process of the former sign of Alice calling Bob bobABC.com and the figure is similar.Corresponding S-CSCF handles for caller Alice accomplishes calling service in the IMS network of the ABC of operator; According to called domain name; INVITE is asked to be routed to the I-CSCF in this territory, and it is that Bob provides service that this I-CSCF selects a S-CSCF, in this process; Mutual through LIR/LIA and HSS, the INVITE request is transmitted toward the I-CSCF in operator UVW IMS territory.

2, the IMS ID is except that SIP URI; Can also be Tel URI; For satisfying the demand of IMS user and existing network user intercommunication; Like IMS user and mobile CS territory or PSTN network user's intercommunication, IMS user's public subscriber identification must be followed the telecommunication numbering mode, so IMS user's public subscriber identification also can be the E164 number of Tel URI form.

(1) caller is IMS user, and the called IMS IP multimedia pUblic identity is a Tel URI form.

Caller is IMS user, calls out called E164 number, and according to existing 3GPP flow process, the S-CSCF that accomplishes calling subscriber's processing converts called number Tel URI into corresponding SIPURI through the ENUM inquiry, does follow-up route according to SIP URI.Because of Tel URI is converted into SIPURI in the caller handler flow process, the handling process that converts into after SIP URI identifies is identical with the handling process of appropriate section among Fig. 2 and Fig. 3, repeats no more.

(2) caller is CS territory user, and the called IMS IP multimedia pUblic identity is the E164 number of Tel URI form.

The call flow of 3GPP regulation is shown in Fig. 4 A, and called E164 number obtains handling in the CS network as any other E164 number.Behind the route analysis, be sent to called IMS user attaching territory MGCF (MGCF).MGCF converts the BICC/ISUP signaling into sip message, sends INVITE to I-CSCF.I-CSCF finds called subscriber's S-CSCF alternately and INVITE is routed to this S-CSCF through the LIR/LIA of Cx interface.

Called subscriber Bob is designated 1239988 at the E164 of the ABC of operator, change the service provider after, the UVW of operator be designated 3219988, caller Alice still calls out Bob with old sign 1239988, handling process is shown in Fig. 4 B in the present invention:

Step 1-2: caller Alice calls out Bob with former public identify 1239988, and CS territory network entity is according to number 1239988, call signaling is routed to the MGCF in the IMS territory of the ABC of operator.MGCF transfers IAM to sip message and mails to I-CSCF.

Step 3-4:I-CSCF is to HSS inquiry location called subscriber's S-CSCF; HSS brings I-CSCF with new digit 3219988 in the LIA response of returning.

Step 5-6:I-CSCF returns 300 response messages to MGCF, and MGCF returns the ACK message authentication and receives response message.

Step 7:MGCF according to self routing configuration, carries out route to this E164 number according to the new digit 3219988 of carrying in 300 response messages, sends the corresponding MGCF that IAM finally arrives operator UVW IMS territory.

User's new digit 3219988 also can be the Subscriber Number in CS territory or PSTN territory; For example Bob has cancelled the IMS service; Become the domestic consumer in CS territory, the route destination node of IAM message in network is corresponding switch in the CS territory in this case, rather than the MGCF in another IMS territory.

For adapting to various different scenes, the present invention supports that equally former public identify is SIP URI, and the current public identify that uses is the E164 number, and former public identify is the E164 number, and the current public identify that uses is SIP URI.

Consult shown in Fig. 5 A, user's former public identify is SIP URI, and the public affairs of current use are when being designated the E164 number, and the handling process of the former public identify SIP of calling party URI is following:

Step 1: caller Alice is that public identify bobABC.com initiates initial request to the SIP URI of Bob.

Step 3-4:I-CSCF2 is the S-CSCF that the user provides service with LIR to the HSS inquiry still.HSS is according to the public subscriber identification among the LIR, and Query Database finds that the registered public subscriber identification of user carries business, therefore corresponding E164 number is returned to I-CSCF2 in the LIA response.

Step 5:I-CSCF2 finds that the number after called subscriber's conversion is the E164 number, and then I-CSCF2 transmits INVITE request message (need not increase the record-route header field to be retained in the follow-up signaling paths) to the BGCF2 in this territory.

Step 6: after the BGCF2 in this territory analyzes called E164 number, have two kinds maybe, select the MGCF2 in the consolidated network to convert the SIP signaling into the ISUP/BICC signaling, and control IMS-MGW is connected to the called subscriber, i.e. flow process shown in Fig. 4 A.Perhaps, BGCF2 selects another BGCF in the different operators IMS network to come in its network, to select MGCF to be connected to the called subscriber.

Consult shown in Fig. 5 B, user's former public identify is the E164 number, and the public affairs of current use are being designated SIP URI, and the handling process of calling called subscriber's E164 number is following:

Step 1-2, circuit domain calling subscriber's call IMS user's E164 number, CS territory network entity be according to the E164 number, call signaling is routed to the MGCF in the IMS territory of the ABC of operator; Convert the IAM signaling into sip message by MGCF and mail to the I-CSCF entity.

After step 3-4, I-CSCF1 and HSS are mutual; Find that the called subscriber is converted into SIP URI, therefore, inquire about DNS according to the domain name part of this SIP URI; INVITE is asked to be routed to the I-CSCF2 of corresponding network, select the suitable S-CSCF in this territory to carry out subsequent treatment by I-CSCF2.I-CSCF1 need not to increase Record-Route and is retained in follow-up signaling paths.

Called public subscriber identification carries professional IMS realization flow description more than the summary, can support several kinds of situation of following table:

Original ID	Existing ID	Next jumping that Forward handles	Next jumping that Redirect handles
				SIP URI	SIP URI	I-CSCF	S-CSCF
TEL URI	TEL URI	BGCF	MGCF

SIP?URI	TEL?URI	BGCF	S-CSCF
				TEL?URI	SIP?URI	I-CSCF	MGCF

When the existing ID that from LIA, obtains as I-CSCF was TEL URI, I-CSCF also possibly carry out the ENUM inquiry with this TEL URI and (like Fig. 6 step 3, step 4), carry out Forward or Redirect handles with the result after the inquiry; Whether inquire about and to indicate through LIA in the local configuration of I-CSCF or by HSS.

No matter existing ID is SIP URI or TEL URI, and I-CSCF can carry out Forward or Redirect to be handled.Shown in step 5 among Fig. 6 (subsequent treatment that step 5 expression I-CSCF possibly carry out), next of concrete handling process jumped referring to last table.

Have public subscriber identification and carry professional user when doing caller, hope that its caller ID that makes a call remains original ID, rather than the ID that provides of new operator, its handling process is as shown in Figure 7:

In operator's UVW territory registration, Bob calls out Alice as the calling subscriber to step 1:Bob, sends the INVITE request to P-CSCF.Wherein the P-Preferred-Identity header field carries the registered ID bobUVW.com of Bob, or comprises the also registered sign that other are distributed by the UVW of operator, as 3219988.

ID is registered really in the step 2:P-CSCF inspection P-Preferred-Identity header field, then increases P-Asserted-Identity, is worth to be ID in the P-Preferred-Identity header field.Otherwise P-Asserted-Identity fills out the sign into default registered users by P-CSCF.

Step 3-4:S-CSCF receives INVITE, judges that the ID among the P-Asserted-Identity is registered, then according to this user's service contracting data, INVITE is routed to relevant AS accomplishes the calling service processing.

After step 5:S-CSCF accomplishes the calling service processing, INVITE is routed to the I-CSCF in territory, called place.Among the present invention; After S-CSCF accomplishes the calling service processing; Therefore according to user contracting data, judges has the caller public subscriber identification to carry business, INVITE is routed to before the called territory I-CSCF; Sign in the P-Asserted-Identity header field is replaced with original sign of user, for example replace with bobABC.com or 1239988.

The public subscriber identification that the method through above " S-CSCF accomplishes calling service and handles back modification P-Asserted-Identity header field " removed satisfies the user when doing caller carries demand, also can reach identical purpose through following method:

At the HSS of the UVW of operator, the public subscriber identification that user's original number bobABC.com or 1239988 is also distributed as user bob can independent registrations and have independently service configuration data.According to 3GPP agreement TS24.229-640; 5.1.1.2 " Initial registration "; When user terminal sends REGISTER; Request-URI is set to the domain name in user attaching territory, and said by " 5.1.1.1AParameters contained in the ISIM ", this information is to be kept in the user ISIM card.Therefore, even the user registers (From, To header field are corresponding old public subscriber identification) with old public identify, REGISTER also can be correct is routed to the user attaching territory.Based on the method, it is professional that the user can use former sign to initiate as calling identification, even can corresponding corresponding service configuration data.But user's former sign can not occur at existing network as called identification, and promptly existing network can not provide called service to former sign.

Variant based on former public subscriber identification and common public subscriber identification, operator also can be attached to user's former public identify the public subscriber identification of existing network normal allocation.HSS limits the user and can not adopt this former sign to initiate registration.Be provided with simultaneously bobABC.com or 1239988 and the bobUVW.com sign that can be used to initiate to register be in same implicit registration group; And this original subscriber sign does not have independent user signing contract information, and the shared same service configuration data of always concentrating with same implicit registration of normal existing network ID.After bob succeeds in registration through bobUVW.com, be in sign with the implicit registration group and also be in and succeed in registration, so bob can make a call with sign bobABC.com.

Public subscriber identification carries business among the present invention, comprises that not only traditional user changes the not number of changing business of operator, also comprises the form of service that other are possible.For example: in mobile fixing and fusing class business, the user is the service (being fixed network and mobile network's user simultaneously) of signatory two networks simultaneously, and the relative users sign is arranged respectively in two networks.The user registers at fixed network, and when its mobile network user sign was called out, corresponding call was transferred to user's fixed network terminal (mobile network is the IMS network).Perhaps, the user is in mobile network register, when its fixed network users sign is called out, and the switchable portable terminal of corresponding call (fixed network is the IMS network) to the user.This business realization can be used the aforesaid called public subscriber identification of this paper and carry flow process; Promptly carry out corresponding transfer processing by I-CSCF; Different place, only be that user's public subscriber identification that HSS preserves carries the updating data mode, for changing the not number of changing of operator; Carry business datum according to user's requirement at the public subscriber identification that HSS sets the user by operator; And professional to moving the fixing and fusing class, the public subscriber identification of then preserving at HSS carries related data and dynamically updates in the registration of heterogeneous networks along with the user, specifically how to dynamically update not belong to scope of the present invention.

Public subscriber identification carries business among the present invention; Also comprise the application that distributes public subscriber identification flexibly; In this case, first sign is the personalized logical identifier that the user selects, and second is designated the user belongs to the public subscriber identification that ownership IMS Virtual network operator distributes for this user.Illustrate as follows:

User Alice is Huawei employee, and the IMS network of the ABC of operator is its home network.Alice hopes to answer the work associated call with " sip:alicehuawei.com " as its public subscriber identification.Obviously, other employees of Huawei company are not necessarily the user of the ABC of operator, by prior art, can not dispose the I-CSCF address that " huawei.com " corresponds to the IMS network of the ABC of operator at DNS.Otherwise; If Carol is the IMS network user of the UVW of operator; Hope is answered the work associated call with " sip:carolhuawei.com "; If in the I-CSCF address of the IMS network of DNS configuration " huawei.com " corresponding ABC of operator, then all have also all mail to the I-CSCF of ABC to the call request of Carol, and the actual I-CSCF that should mail to UVW.Therefore prior art can't satisfy this demand.

As shown in Figure 8, adopt flow process of the present invention to address the above problem.Though the IMS operation is not done by Huawei company, manages can this domain name of huawei.com is entrusted to certain domain name supervising operator.This operator adopts the inventive method, at DNS Server the address of the corresponding I-CSCF1 of huawei.com domain name is set, and at HSS sign alicehuawei.com corresponding identification being set is aliceABC.com.Called for the initial request of alicehuawei.com is routed to I-CSCFl, after I-CSCFl and HSS are mutual, initial request is forwarded to the ownership IMS territory of Alice, then alice can answer the call with sign alicehuawei.com.Carolhuawei.com in like manner is set corresponds to carolUVW.com, the also available carolhuawei.com of Carol answers the call, though Carol and Alice can't help same operator telecommunications service are provided.Obviously, the domain name supervising operator here can be common IMS operator, except that accomplishing the domain name mandatory administration, also provides other IMS professional, or the special domain name authority of national appointment.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. in the IMS network, realize the method that public subscriber identification carries for one kind, it is characterized in that, comprise the steps:

2. the method for claim 1; It is characterized in that; Said boundary Control functional entity is the interrogation-call session control function I-CSCF entity in the IMS network; This I-CSCF entity and home subscriber server HSS are mutual, are obtained corresponding second sign and return to the I-CSCF entity through response message according to user's first sign by this HSS.

3. method as claimed in claim 2; It is characterized in that; If said called subscriber's first is designated the number of SIP URI form; Second when being designated the E.164 number of Tel URI form, and the I-CSCF entity is forwarded to the border networks controlled function BGCF entity of this IMS network domains with initial request, by the BGCF entity according to this E.164 number transmit initial request.

4. method as claimed in claim 2; It is characterized in that, if said second be designated SIP URI form public subscriber identification, the I-CSCF entity carries out the DNS inquiry according to the domain name part of this public subscriber identification; According to Query Result, initial request is forwarded to the I-CSCF entity of corresponding field.

5. like claim 3 or 4 described methods, it is characterized in that HSS also carries the treatment type information of the subsequent treatment action of indication I-CSCF entity in said response message.

6. method as claimed in claim 5 is characterized in that, the I-CSCF entity mails to the affiliated network domains of second sign according to said treatment type with initial request; Perhaps

The I-CSCF entity is according to said treatment type, returns the response message that carries second sign to the forward direction network entity, by said feedforward network entity according to the said initial request of this second identification process.

7. method as claimed in claim 2 is characterized in that, in the address of the corresponding said I-CSCF of domain name mapping result of the domain name part of dns server configuration first sign.

8. like claim 1～4; 7 each described methods; It is characterized in that; Said calling subscriber and called subscriber's first is designated signatory separately public subscriber identification and carries professional former public subscriber identification, and said calling subscriber and called subscriber's second is designated signatory separately public subscriber identification and carries the public subscriber identification of the professional current use of user.

9. the method for claim 1; It is characterized in that; Said calling subscriber and called subscriber's first sign is respectively the personalized logical identifier of calling subscriber and called subscriber's selection, and calling subscriber and called subscriber's second sign is respectively and belongs to the public subscriber identification of ownership IMS Virtual network operator for this calling subscriber and called subscriber's distribution separately.

10. an IMS network system is characterized in that, comprising:

11. IMS network system as claimed in claim 10 is characterized in that, after the I-CSCF entity obtains called subscriber's second sign, initial request directly is forwarded to the affiliated network domains of second sign; Perhaps

After the I-CSCF entity obtains said sign, return the response message of the public identify that carries the current use of user, handle said initial request according to the public identify of current use by said feedforward network entity to the forward direction network entity.

12. like claim 10 or 11 described IMS network systems; It is characterized in that; Said first is designated the public subscriber identification of having contracted carries professional user's former public subscriber identification, and said second is designated the public subscriber identification of having contracted carries the public subscriber identification of the professional current use of user.

13., it is characterized in that first sign is the personalized logical identifier that the user selects like claim 10 or 11 described IMS network systems, second is designated the user belongs to the public subscriber identification that ownership IMS Virtual network operator distributes for this user.