CN101765102B

CN101765102B - Method for changing subscription and system

Info

Publication number: CN101765102B
Application number: CN201010001407.8A
Authority: CN
Inventors: 迷卡·普克赛卡; 迷克尔·赫尔曼; 扎库·拉加尼迷
Original assignee: Nokia Oyj
Priority date: 2002-01-21
Filing date: 2002-01-21
Publication date: 2014-07-02
Anticipated expiration: 2022-01-21
Also published as: CN101765102A

Abstract

The invention relates to a method for changing subscription information of a user in data network and a system thereof. The method comprises the steps of: detecting the condition that user profile or subscription information is changed or updated; and starting a register process, so that the terminal equipment (40) of the user is registered to a new service network unit (12) correspondingly to the result of the detection operation which is used for detecting whether the capability of a network unit (10) for servicing a terminal equipment (40) of the user is still accordant with the changed subscription information. Therefore, the invention can realize a service entity to be automatically or semi-automatically adapted to the changed subscription.

Description

Change signing method and system

The application is Nokia in the divisional application of the patent application that the application number of application on January 21st, 2002 is 02827384.2, denomination of invention is " changing signing method and system ".

Technical field

The present invention relates to change the method and system of user's CAMEL-Subscription-Information (subscriptioninformation) in data network.Specifically, the present invention relates to change and contract in Internet Protocol (IP) IP multimedia subsystem, IMS (IMS) environment.

Background technology

Carry out level and smooth cooperatively interacting in order to realize access independence and to remain on internet with catv terminal, for example developed in 3GPP standard TS23.228 the IMS of defined to adapt with IETF (internet engineering task group) " Internet Standard ".IP multimedia core network (IMCN) subsystem makes the network operator of mobile or cellular network to provide the multimedia service based on internet applications, service and protocol construction for its user.Intention is to adopt the mechanism that provided by internet and IM CN subsystem to develop these services by mobile network operator and other third-party vendors (be included in space, internet those).Therefore IMS can change sound, video, message transmission, data and for wireless user's network technology and they are conducted interviews, and the growth in the growth of internet and mobile communication is combined.

Fig. 1 demonstrates according to the framework of the IMS network of 3GPP (third generation partnership project) standard above.The principle of this framework based on such, for roamer's the Service controll for home subscribed services at home network HN, for example service call state control function (S-CSCF) is arranged in home network HN.In Fig. 1, demonstrate current or old S-CSCFo10 and in the future or new S-CSCFn12, the needed capacity variation causing due to the variation of the user profiles by UE40, so terminal equipment or subscriber equipment (UE) 40 will be changed between them.

In general, S-CSCF carries out session control service to served UE.It is maintaining the needed session status of network operator to these services are supported.In operator's network, different S-CSCF can have different functional.The function of being carried out during corresponding session by S-CSCF has for example registration, session workflow management, charging and the utilization of resources to manage.In the time that user roams into visited network VN, this visited network VN has supported agency-CSCF (P-CSCF) 30, and the corresponding S-CSCF that it makes it possible to being positioned at home network HN place carries out session control and Service controll is provided.In addition, inquiry-CSCF (I-CSCF) 50 is provided as the communication center in operator's network in home network HN, for leading to that network operator's user or being currently located at all connections of the roamer in that network operator's coverage.In operator's network, can there be multiple I-CSCF.The function of being carried out by I-CSCF50 comprises distributes to by a S-CSCF user who carries out registration process, the request receiving from another network is routed to this S-CSCF, keep the address from the S-CSCF of customer data base, for example home subscriber server (HSS) 20 as shown in FIG. 1 carries out access, and/or request or response are transferred to according to from the definite S-CSCF in the variation address of HSS20.

P-CSCF30 is the first communication center in IMS.Its address is found after PDP (data packet protocol) contact activation by UE40.P-CSCF30 as agency, its receive request and inside for their service or may translation after by they forwarding.P-CSCF30 can also be used as user agent, and under abnormal conditions, it can stop and produce separately transaction.The function of being carried out by P-CSCF30 is that the registration request receiving from UE40 is sent to I-CSCF, for example, the definite I-CSCF50 of home domain name being provided by UE40 is provided, and request or response are transmitted to UE40.

Can from above-mentioned 3GPP-standard, collect about other details in the function of the different CSCF unit shown in Fig. 1.

According to the legacy network architecture in the 5th edition standard of above-mentioned 3GPP, HSS20 does not know the ability kind that specific S-CSCF has in this network.On the contrary, HSS20 knows which kind of ability S-CSCF needs support specific user.This information is stored in specific user's user profiles.During the startup registration process of UE40, needed S-CSCF ability is sent to I-CSCF50 by HSS20, and complete the actual selection to S-CSCF by I-CSCF50.Carry out the selection at I-CSCF50 according to representing needed ability and the information receiving from HSS20.

But, when needs upgrade for example current for UE40 serve S-CSCFo10 in user profiles time, HSS20 can not know whether selected S-CSCFo10 still can provide sufficient service for the user of UE40.S-CSCFo10 may not support according to the needed new ability of new user profiles.Another possibility is that service supplier has removed some services from user profiles, has therefore stoped the use of this service or service.

If the ability of S-CSCFo10 does not conform to the user profiles of renewal, user can not use all signing services, or may receive him or she and no longer wish the service having.In addition, the service payment that user may cancel for she or he.And, if denial of service of network operator, user may still can use he or she no longer have the right use these services.

Summary of the invention

Therefore, one object of the present invention is to provide a kind of and changes signing method and system, even if also can guarantee fully or the service function matching after user's user profiles changes with system by this method.

This object be by a kind of for change the method for user's CAMEL-Subscription-Information at data network, said method comprising the steps of:

Detect the variation in described user's described CAMEL-Subscription-Information;

Whether the ability that checks the network element that is described subscriber terminal equipment service still conforms to the CAMEL-Subscription-Information of described variation; And

Start a registration process to described user's described terminal equipment is registered on new service network unit in response to the result of described inspection step.

In addition, object is above by a kind of system of the CAMEL-Subscription-Information that is used for changing user in data network, and described system comprises:

Checkout gear, for detection of the variation in described user's described CAMEL-Subscription-Information;

Whether testing fixture, still conform to the CAMEL-Subscription-Information of described variation for the ability of the network element of described user's terminal equipment service for checking; And

Starting drive, for starting registration process to described user's described terminal equipment is registered to new service network unit in response to described testing fixture.

In addition, object above by a kind of for storing user's the customer data base of CAMEL-Subscription-Information of data network, described database is arranged to the variation detecting in described CAMEL-Subscription-Information, and in response to the result for checking the inspection operation whether still conforming to the CAMEL-Subscription-Information of described variation for the ability of the network element of described user's terminal equipment service, start registration process to described user's terminal equipment is registered on new service network unit.。

Therefore,, in the time that user's user profiles upgrades or changes, do not mate and be automatically detected and distribute the new service network unit with enough abilities by starting registration process in the ability at service network unit place.Thus, new CAMEL-Subscription-Information almost just can be considered into immediately in the time that it has been configured or has been stored in the customer data base of data network.

Checking that step can comprise according to the CAMEL-Subscription-Information of described variation checks that whether described service network unit can also be described user's described terminal equipment service.

The detection that detecting step can upgrade based on user profiles, or can the signing detection to new equipment based on described user.

According to a favourable improvement, check on the basis of the ability information that step can be in the response message that joins the registration process being started by described terminal equipment based on described detecting step and carry out.In this case, can, in response to the de-registration procedure having started, start described re-registration process by described terminal equipment when the variation of described CAMEL-Subscription-Information detected in described detecting step time.Or this registration process can be the periodic registration procedure with predetermined time interval startup.

Preferably, provide configuration information to determine the subscribed services that needs reservation service network element.

The improvement favourable according to another, checks that step can comprise the following steps: the capability query that comprises the information that represents at least one needed ability is sent to described service network unit; By the ability of described service network unit with compare about the information of described at least one needed ability; And receive the confirmation of the result that represents described comparison step from described service network unit.As a possibility, check that step can comprise the following steps: will represent that the information of at least one needed ability and the mark of described service network unit send to inquiry network element; Check at described inquiry network element place whether described service network unit meets described at least one needed ability; And from described inquiry network element, receive the confirmation of the result that represents described inspection step.Then, can will send to service network unit for the deregister message of this terminal equipment of cancel register in response to the received result of comparison step.Then can be by terminal equipment in response to the message initiated re-registration process of being sent by service network unit.In this case, deregister message can comprise a cause information, and it represents that the reason of cancel register is to change user profile.

As the possibility of the re-registration process through network startup, can adopt at least one needed ability to carry out the selection function of log-on data network, and the identification information of obtained described new service network unit is informed to the agency network unit being connected with described terminal equipment.Can adopt the mark of the described agency network unit that is stored in customer data base place to carry out described notice.Can adopt deregister message from this mark of service network unit requests.Can carry out this selection function by inquiry network element.

As another possibility, can include about the capabilities list of the information of needed service network unit capability and check step by request from data network.Specifically, can from inquiry network element, ask this capabilities list.Therefore, this testing fixture can be inquiry network element, the I-CSCF of for example IMS.Inquiry network element may be arranged to based on responding with registed authorization the ability information together receiving carries out that inspection operation.

Detection part can be a customer data base, for example HSS.Therefore, if desired can direct-detection go out variation at the user profiles at customer data base place to check this ability and start registration process.

Starting drive can be customer data base, wherein starts registration process by the selection function of log-on data network core or by sending deregister message.As a possibility, starting drive can be to be arranged to inquiry network element from registration message to new service network unit that send.

This customer data base may be arranged to according to the configuration information providing at described database place forbids unnecessary registration.

Accompanying drawing explanation

Below with reference to accompanying drawings the preferred embodiments of the invention are elaborated, wherein:

Fig. 1 demonstrates a schematic network architecture, wherein can implement the preferred embodiments of the invention;

Fig. 2 demonstrate one message signale send and process block diagram, brief description according to the signing reprogramming of the second preferred embodiment;

Fig. 3 demonstrates a message signale and sends and process block diagram, and brief description is according to the signing reprogramming of the second preferred embodiment;

Fig. 4 demonstrate one message signale send and process block diagram, brief description according to the signing reprogramming of the 3rd preferred embodiment; And

Fig. 5 demonstrate one message signale send and process block diagram, brief description according to the signing reprogramming of the 4th preferred embodiment.

Embodiment

Below basis is described preferred embodiment in the IMS network architecture shown in Fig. 1.

Relate to one group of core-network entities at the IMS shown in Fig. 1, they adopt the service being provided by packet-switched domain that multimedia service is provided.HSS20 is the master data base for given user, and comprises the function of traditional attaching position register (HRL) and be exclusively used in the new functionalized of for example IMS of IP network.HSS20 includes the entity of processing in practice calling and/or session to signing relevant information with network enabled entity.Home network HN can comprise one or several HSS according to mobile subscriber's quantity, place capacity and network configuration.HSS20 can integrate different information, and can realize the enhancing characteristic that will offer application and service territory in core network.Specifically, HSS20 is for example responsible for, for preserving and user-dependent information, user ID, numbering and address information, user security information, customer position information and subscriber profile information.Based on this information, HSS20 can also be responsible for supporting not same area and subsystem such as calling control and the session management entity of IMS, radio network sub-system (RNS) etc.

According to these preferred embodiments, if showing S-CSCFo10 current after the CAMEL-Subscription-Information of relative users changes, efficiency test no longer can, for this UE40 service, the registration process for UE40 being registered to new S-CSCFn12 be started.Service network unit or entity can carry out according to different modes in response to this automatic or semi-automatic adaptation of efficiency test, as described in four preferred embodiments below.In the time that signing or user's bay of user changes, for example, in the time that user has ordered new service, the S-CSCFo10 being assigned with may not support the service that these are new.

Can, for the new S-CSCFn12 of this user's service, can carry out in the following process shown in Fig. 2 according to the first preferred embodiment in order to distribute.

As shown in Figure 2, HSS20 is by sending to UE40 to cancel this user's registration (step 1 and 2) corresponding deregister message by S-CSCFo10, this will cause such a case, be that UE40 automatically starts new initial registration procedure, because this deregister message includes the cause code that represents cancel register reason.In response to detecting that related user's CAMEL-Subscription-Information or the variation of user profiles add this cause code or cause information by HSS20.This will cause such a case, will select new such as S-CSCFn12 of S-CSCF according to this new user profiles.For fear of unnecessary cancel register, HSS20 can comprise the configuration information that some are used for determining the special S-CSCF of that service needs.The registration message of the registration for new is sent to I-CSCF50 (step 3) by UE40.Then, registration authorization message is sent to HSS20 (step 4) by I-CSCF.In the time that HSS20 knows signing change, it sends to I-CSCF50 by registed authorization response with the ability information of current S-CSCFo10 together with title, rather than with the same title that only sends S-CSCF50 in common procedure.It is to be noted, HSS20 can only send the ability information (step 5) of current S-CSCFo10 equally.Then, this I-CSCF50 can use the two or only use S-CSCF ability information to decide to take which kind of action, whether selects new S-CSCFo10 (step 6).According to check result, I-CSCF50 sends to registration message current S-CSCFo10 or sends to the selected new S-CSCFn12 with desired ability.

Thus, can make the variation of service network functional adaptation in the user profiles related user.If old or current S-CSCFo10 has met this S-CSCF Capability Requirement, in new registration process, select this old S-CSCF10.

Fig. 3 demonstrate a message signaling and process block diagram, brief description according to the signing reprogramming of the second preferred embodiment.In this second embodiment, HSS20 for example can not start any action (step 1) at UE40 to network before I-CSCF50 sends normal periodic registration message.Work as periodic registration, it is registration authorization message, while arriving HSS20 (step 2), HSS20 knows and signing changed and will include the ability information of current S-CSCFo10 and the registed authorization response message of title sends to I-CSCF50, rather than just sends the title (step 3) of current S-CSCFo10.Also have in present case, it is to be noted, HSS200 can a transmitting capacity information.This I-CSCF50 can use the two or only use S-CSCF ability information to decide to take which kind of action, whether selects for example new S-CSCFn12 (step 4) of new S-CSCF.Shown in Fig. 3 in the situation that, because the old S-CSCFo10 distributing does not meet these requirements, so by registration message being sent to S-CSCFn12 select new S-CSCFn12 (step 5), to provide suitable service for the user of UE40.

In above-mentioned the first and second preferred embodiments, automatically re-register and can be accompanied by the new function of old S-CSCFo10 title being removed or provided corresponding indication information from HSS20.

According to the third and fourth preferred embodiment below, HSS20 first check current S-CSCFo10 whether support by the user profiles changing or the needed new demand of CAMEL-Subscription-Information and according to the result that checks operation by corresponding user profiles or service entities is selected or change process starts.If current S-CSCFo10 can support these new demands, in current S-CSCFo10, upgrade new user profiles.If current S-CSCFo10 can not support these new demands, HSS20 starts to cause the process to new S-CSCFn12 change.It is to be noted, in the third and fourth preferred embodiment, suppose that UE10 is arranged in the network VN being accessed and connects by P-CSCF30.

According to the 3rd preferred embodiment, start the de-registration procedure through network startup, this causes such a case, include this practical work of cause code of the reason that clearly shows cancel register due to the deregister message of being sent by HSS20, so UE40 automatically starts new initial re-registration process.This causes such a case, will select new S-CSCFn12 according to new user profiles.

Fig. 4 demonstrate one message signale send and process block diagram, brief description according to the signing reprogramming of the 3rd preferred embodiment.In the time sending new user profiles, HSS20 is to the S-CSCFo10 transmitting capacity inquiry (step 1) of current selected.This capability query comprises new needed ability.It is to be noted, this operation can join from HSS20 and upload to the existing profile current S-CSCFo10, or it can be the new mechanism between HSS20 and current S-CSCFo10.Current S-CSCFo10, to the response of HSS20 transmitting capacity, comprises the confirmation (acknowledge) (step 2) of positive or negative.So if because the current S-CSCFo10 that lacks ability can not be user's service again, it will send Negative Acknowledgement.If current S-CSCFo10 can be still user's service, it will send out positive acknowledgement to HSS20.If sent the user profiles making new advances, current S-CSCFo10 can be by its storage to use subsequently.

If HSS20 receives a positive acknowledgement, it ends to select or change process.If do not send out user profiles in step 1, HSS20 starts as user profiles upload process fixing in above-mentioned 3GPP standard.

If HSS20 receives Negative Acknowledgement, it has clearly shown that by sending to have to current S-CSCFo10 reason is to upgrade the deregister message of the cause code of user profiles, thereby the de-registration procedure through network startup is started to (step 3).Current S-CSCFo10 receives from the message of HSS20 and produces suitable SIP (session initiation protocol) message with suitable cause code, for example NOTIFY, and it is sent to P-CSCF30 (step 4).Then P-CSCF30 is transmitted to sip message UE40 (step 5).This makes UE40 can automatically and immediately start re-registration process.Specifically, UE40 is received in the sip message sending out in step 4 and 5 and the necessity that detects registration.But UE40 startup registration process (step 6) as defined in above-mentioned 3GPP standard.Thus, can select to be enough to competent services network entity.

According to the 4th preferred implementation, HSS20 has started new process, and this process is changed into distributed current S-CSCFo10 the new S-CSCFn12 that supports new requirement, and can not relate to UE40.If for example UE40 does not also have subscription registration event report datagram, this network may not flow to UE40 by the deregister message through network startup.

Fig. 5 demonstrate a message signaling and process block diagram, brief description according to the signing reprogramming of the 4th preferred embodiment.In the time sending new user profiles, HSS20 sends capability query (step 1) to current S-CSCFo10.This capability query includes according to the ability of the new needs of new user profiles.Also have under present case, this operation can be joined from HSS20 and upload to the existing subscription data of current S-CSCFo10 or it can be the new mechanism between HSS20 and current S-CSCF010.

If received capability query, current S-CSCFo10 compares the ability of himself and needed ability and decisions making whether it can support needed ability.If current S-CSCFo10 can be no longer user's service owing to lacking ability, it will send the capabilities response (step 2) with Negative Acknowledgement to HSS20.If current S-CSCFo10 can be still user's service, it will send positive acknowledgement to HSS20.If new user profiles is sent to S-CSCFo10, it stores its to use later.

If HSS20 receives positive acknowledgement, it has ended this process.

If do not send out user profiles in step 1, HSS20 starts as user profiles upload process fixing in above-mentioned 3GPP standard.

If HSS20 receives Negative Acknowledgement, the same as shown in FIG. 5, the current or old S-CSCFo10 that HSS20 serves to the user who is at present UE40 sends deregister message.The request (step 3) of the address that this message comprises the P-CSCF30 to being subject to accesses network VN and/or title.Current S-CSCFo10 receives this deregister message and address and/or this message (step 4) of name confirmation with P-CSCF30.Then current S-CSCFo10 can delete related user's existing user profiles.Because deregister message includes address for sending P-CSCF30 and/or this practical work of request of title, so current S-CSCFo10 sends any notice to P-CSCF30.HSS20 receives has the address of P-CSCF30 and/or the confirmation of title, and temporarily stores these users' P-CSCF address and/or title (step 5).It is to be noted, the address of P-CSCF30 and/or title can permanent storage in HSS20.Then, HSS20 just needn't ask address and/or the title of P-CSCF30 in step 3.

In step 6, HSS20 sends message to I-CSCF50, and it comprises according to the needed user ID of CAMEL-Subscription-Information user and the new ability that change.This message can be the message for starting the selection function of selecting new service entities.In response to the reception of message, I-CSCF50 starts for user's new S-CSCF and selects (step 7) according to the ability newly needing.Then, I-CSCF50 sends to the S-CSCFn12 of new selection the registration message (step 8) that comprises user ID.In response to this, new S-CSCFn12 starts as the user profiles upload process (step 9 is to 12) of defined in above-mentioned 3GPP standard.In the time that user profiles upgrades, new S-CSCFn12 produces the such as NOTIFY of suitable sip message of the address that includes new S-CSCFn12, and it is sent to P-CSCF30 (step 13).In step 14, P-CSCF30 storage or upgraded the S-CSCF address (step 14) using in session in future.Finally, P-CSCF30 confirms to new S-CSCFn12 by SIP200OK message, and this new S-CSCFn12 confirms to I-CSCF50 by SIP200OK message, and I-CSCF50 will confirm to send to HSS20 accordingly.Then, made this services network entity be adapted to the user profiles changing.

The efficiency test being undertaken by HSS20 in the third and fourth embodiment operates and can be replaced by checking process below.According to this optional checking process, HSS20 can send to I-CSCF50 by the inquiry to capabilities list.This message can comprise the needed ability of new S-CSCF.Then, I-CSCF50 checks needed ability and reports available S-CSCF list to HSS20.Then HSS20 checks whether current S-CSCFo10 is included in this capabilities list.

As another optional checking process, in the first step, HSS20 can send to I-CSCF50 by the address of current or old S-CSCFo10 in corresponding updating message together with the ability newly needing according to the user profiles upgrading or change.Then,, in second step, I-CSCF50 confirms to HSS20 whether this old S-CSCF10 meets new requirement.According to the notice receiving from I-CSCF50, HSS20 can be according to following optional mode effect.If old S-CSCFo10 meets these requirements, the profile starting from HSS20 to I-CSCF50 is upgraded.If do not met, HSS20 starts as above in conjunction with the re-registration process through network startup as described in Figure 4 and 5 or S-CSCF selection course.

Can be by replacing capability-based selection to reduce the needs of capability negotiation with default S-CSCF.Therefore,, in the time detecting that according to the CAMEL-Subscription-Information changing current S-CSCFo10 can not serve for user, can select default S-CSCF.

In addition, can in HSS20 and S-CSCF and/or the Cx interface of I-CSCF between functional, the capability query of HSS20 be attached in existing PPR diameter command.

If can not notify UE40 to make new registration in the 3rd preferred embodiment, P-CSCF30 can start new registration after receiving notification message.Then, needing the only element of change will be P-CSCF30.

As another possibility, HSS20 can know the S-CSCF that provides in this network have the ability.In order to achieve this end, can be by corresponding form stores at HSS20 place.Then, in the third and fourth preferred embodiment by need to not be from the capability query of I-CSCF50 or current S-CSCFo10.Then can in HSS20, check operation.And, if HSS20 includes some configuration informations, can avoid carrying out unnecessary cancel register.

In addition, aspect user profiles renewal, can notify its old S-CSCF10 not support to distribute to its new user profiles.Then, can be according to starting the change of S-CSCF with the similar negotiations process of capability query of the first and second embodiments.That is, if old S-CSCF10 receives the new user profiles from HSS20, it sends the acknowledge message that can include reason for example " serv-fail " or " service unknown " etc. to HSS20, shows that it does not support this profile.

It is to be noted, the present invention is not limited to above-mentioned preferred embodiment.The present invention can be applied in any data network, and wherein user's CAMEL-Subscription-Information affects the needed ability of service network unit.Therefore, the appointment of network element or entity and function and signaling message can be different in other or data network in the future.Therefore these embodiments can change within the scope of the appended claims.

Claims

In customer data base in the home network of user in data network (HN) for storing described user's the method for CAMEL-Subscription-Information, described method comprises:

Detect the variation in described user's described CAMEL-Subscription-Information, and

If the result of inspection operation for the ability that checks current service network element (10) indicates described ability not conform to the CAMEL-Subscription-Information of described variation, start registration process, for described user's terminal equipment (40) being registered to the new service network unit (12) that session control service is provided for described terminal equipment (40).
2. method according to claim 1, it further comprises: start described registration process by sending deregister message, described deregister message is used for described user's described terminal equipment (40) from described current service network element (10) cancel register.
3. method according to claim 1, is wherein used for selecting the selection function of described new service network unit (12) to start described registration process by startup.
4. according to the method one of claims 1 to 3 Suo Shu, wherein said customer data base is HSS.
5. according to the method one of claim 2 to 4 Suo Shu, further comprise: the configuration information based on providing in described customer data base place is forbidden unnecessary registration.
6. the method for being used by terminal equipment (40) at data network, described method comprises

Be registered to the service network unit (10,12) that session control service is provided for described equipment (40);

The deregister message that reception contains cause information, described cause information is that described deregister message has been indicated reason;

In response to described deregister message, if the result of inspection operation for the ability that checks current service network element (10) indicates described ability not conform to the variation of described user's CAMEL-Subscription-Information, automatically start new initial registration procedure, for described equipment (40) being registered to the new service network unit (12) that session control service is provided for described equipment (40).
7. method according to claim 6, wherein said deregister message is the message according to session initiation protocol.
8. method according to claim 7, wherein said deregister message is SIPNOTIFY message.
9. the method for being used by inquiry network element (50) at data network, described method comprises:

Whether the ability that the current service network element (10) of user's terminal equipment (40) is served in inspection still conforms to the variation in CAMEL-Subscription-Information; And

Based on the result of described inspection, start for described terminal equipment (40) is registered to the registration process on new service network unit (12).
10. method according to claim 9, it further comprises: in response to the registration message of the new registration for described terminal equipment (40), send registration authorization message to customer data base.
11. according to the method described in any one in claim 9 to 10, and wherein, described inquiry network element (50) is the enquiry call state control functional unit of internet protocol multimedia subsystem.