CN1997201A

CN1997201A - Method and device for call processing in the phone service continuity

Info

Publication number: CN1997201A
Application number: CNA2005101372074A
Authority: CN
Inventors: 朱东铭; 段小琴
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-12-31
Filing date: 2005-12-31
Publication date: 2007-07-11

Abstract

This invention discloses one method to process calls in sound business continuous process, which comprises the following steps: in sending calls in circuit area, taking continuous control function public business label and called user information in calls; converting the circuit area calls into the dialogue require information composed of CCCF PSI and called user information dialogue with CCCF function to get the called information and to process anchor control. This invention also discloses one terminal device composed of call signal generation module and receives and send module.

Description

In phone service continuity, handle method and the device of calling out

Technical field

The present invention relates to communication technical field, especially a kind of method and device of calling out of in phone service continuity, handling.

Background technology

IP Multimedia System (IMS) is a subsystem that is superimposed upon in the WCDMA network that increases in the 3GPP R5 stage on the existing packet domain, adopt the bearer path of packet domain for its upper strata control signaling and media delivery, and introduce Session Initiation Protocol as professional control protocol, utilize simple, the easy expansion of SIP, media combination characteristics easily, by business control is separated with carrying control, provide abundant multimedia service.Major function entity among the IMS comprise functions such as control user registration, session control conversation control entity CSCF, provide miscellaneous service logic control function application server AS, manage the home subscriber server HSS of user contracting data concentratedly and be used to realize MGCF/IM-MGW (MGCF) with the circuit switching net interconnecting.The user is by current location agent node P-CSCF access IMS, and session and professional triggering control reach with the business control of AS and then finished by the home domain service node S-CSCF of its registered place alternately.

At present, 3GPP has proposed the calling controlling schemes of the static anchor point (IMS control static anchoring) of a kind of IMS control, to solve in two territories, as CS territory and IMS territory, between the problem switched.The core concept of this scheme is, distribute one to have at the IMS home domain for the user as call continuity controlled function (Call Continuity Control Function, CCCF) application server (ApplicationServer, AS), for from the CS territory or the IMS territory initiate all will be sent to this AS with this user-dependent call/session and carry out grappling control (Anchoring control).Like this, follow-uply no matter take place between CS territory to the territory in IMS territory to switch or the IMS territory takes place switches between the territory in CS territory, all the call/session of grappling is carried out follow-up switching controls and handle by this AS.

Just can in call path, insert an anchor point AS very easily for session control mode among the IMS itself session is controlled, promptly make session be toggled to AS by definition iFC (initial Filter Criteria, initial filter standard or norm).

And in call path, insert an anchor point AS not too easily for the calling control mode in CS territory itself, and therefore, the calling of initiating at the CS territory is toggled to the process of anchor point AS, and the 3GPP standard has been described multiple implementation at present, wherein:

The initial call of initiating when being the CS territory for Calling Side, promptly for Calling Side VMSC (VisitedMobile Switch Center, Visited Mobile Switching Center) receiving the calling of initiating behind the call setup message of UE, can there be network side route control { promptly to use CAMEL (mobile network strengthens the logical client application) scheme } and the end side route is controlled and { promptly used USSD (Unstructured Supplementary ServiceData unstructured supplementary data traffic) and SIP Notify (Session Initial Protocol Notify, " notice " operation of session initiation protocol) }, two kinds of control models route the call to anchor point AS;

The initial call of initiating when being the CS territory for callee side, the GMSC that is called home network is after receiving the calling that comes from Calling Side, according to the calling that GMSC initiates after to the called party information analysis, can use CAMEL scheme and signaling catching scheme to route the call to anchor point AS.

This function that initial call is routed to anchor point AS is called selection function between the territory (Network DomainSelection, NeDS) function.For the CS territory, the entity with NeDS function can be gsmSCF; For the IMS territory, the entity with NeDS function can be an AS.Routing decision entity gsmSCF in the CS territory can be arranged in same physical entity with the routing decision entity A S in the IMS territory.

Adopt the cross-domain switching controls process of VCC (phone service continuity) user that static anchor point scheme finishes as shown in Figure 1, when calling is initially set up, as the calling of UE (A) initiation at UE (B), then this calling is inserted an anchor point AS by gsmSCF or the AS with NeDS function in the call path of Calling Side UE (A), and this AS enables B2BUA (back-to-back user agent) function and is divided into AS in order to the calling with Calling Side and stops section and AS and initiate sections two sections.Described AS termination section is the call leg between UE (A)-AS, and described AS initiation section is the call leg between the AS-UE (B).

In follow-up process of calling out, UE (A ') detect when switching condition satisfies between the territory, wish that will the current calling of carrying out switching to UE (A ') from UE (A) carries out follow-up calling and control, UE this moment (A ') then initiates a new calling at the AS that grappling control is carried out in current calling, AS is after receiving this calling, judge in the time of to carry out switching between the territory, then AS initiates the new calling of initiating of UE (A ') and AS section to continue, discharge the calling of AS termination section then, like this, under the control of anchor point AS, make continuing that UE (A ') same UE (B) carried out calling out, discharge the call leg between previous UE (A)-AS, finished UE (A) to the switching between the UE (A ').

Above-mentionedly this grappling control is carried out in calling, and the function of carrying out hand-off process between the territory when switch taking place is called call continuity controlled function (Call continuity Control Function, CCCF) function, under static anchor point scheme, the entity with CCCF function is an AS in the IMS territory.

Wherein, have the routing decision point gsmSCF of NeDS function or AS and can be arranged in same physical entity with AS with CCCF function; And UE (A) can be the terminal in CS territory, and UE (A ') can be the terminal in IMS territory, switches to the calling of UE (A ') by UE (A), the same calling that has realized user A from the CS territory to the call continuity the IMS territory.

Equally, when calling is initially set up, can in the call path of Calling Side UE (B), insert an anchor point AS, in order to the calling control of switching between the territory of realizing follow-up callee side.

When the user in CS territory makes a call as caller, and adopt network side route control model, i.e. the calling of using CAMEL mechanism to initiate in the CS territory is toggled to AS and carries out grappling, and then corresponding handling process mainly may further comprise the steps as shown in Figure 2:

Step 2-1, the UE that is registered to VMSC make a call and set up Setup message.

Step 2-2, VMSC are triggered to calling among the gsmSCF with NeDS function by Initial DP (Initial Detection Point) message according to the CAMEL Subscription Information of Calling Side.

Step 2-3, the routing number IMRN (IMS Routing Number) who points to the AS with CCCF function in the IMS territory of gsmSCF generation with NeDS function make VMSC route the call on this CCCF according to this routing number.

GsmSCF with NeDS function can pass through at the identification information CCCF of CCCF PSI (CCCF Public Service Identities, the CCCF public service identity) appends methods such as Call Reference Number after and construct IMRN, then, strengthen logical client application connection (CAMEL connect) message by gsmSCF by mobile network IMRN is handed down to VMSC with NeDS function.

Step 2-4, VMSC route the call to the MGCF (MGCF) in the IMS network of calling subscriber ownership by the full message of initial address (IAM) message according to IMRN.

The called party information that step 2-5, MGCF judge in the IAM message is to point to the IMRN of the AS with CCCF function, then send INVITE to I-CSCF, request resource is unified positioning mark (Requested-URI) and is the TEL URI of IMRN (being the URI of phone number format) form in the called party information in this message.

Step 2-6, I-CSCF inquire about routing iinformation according to Requested-URI to home subscriber server (HSS), obtain the AS address information that is associated with this IMRN, the AS address information that promptly has the CCCF function, I-CSCF transmits INVITE to the AS with CCCF function then.

In order to support HSS to return AS information, in HSS, need to dispose CCCF PSI data with corresponding relation with AS address information of this CCCF function according to the IMRN that comprises CCCF PSI information with CCCF function in correspondence.

Step 2-7, have called party information that the AS of CCCF function receives and comprise the session of IMRN of CCCF PSI information after, grappling control is carried out in session, promptly trigger B2BUA (back-to-back user agent) function, stop AS and receive session, initiate a new session at former called party information then, the AS that promptly has the CCCF function is by obtaining the S-CSCF information of calling subscriber's side, then with the Sh interface of HSS, will talk about and route to S-CSCF, and will talk about by this S-CSCF and to route to former callee side.

AS with CCCF function is when initiating a new session at former called party information, to be AS with CCCF function go out the real called party information of the pairing calling of this IMRN according to the IMRN index of the called party information TELURI form in the INVITE that receives to the former called party information of its session, and promptly index goes out to have the pairing real called number information of IMRN that the gsmSCF of NeDS function distributes in step 2-3.

Route the call in the process of former callee side at S-CSCF, when former called party information is the Tel-URI form, S-CSCF carries out ENUM DNS, and (E.164 Number Domain Name System E.164, the domain name converting system) translation function, if original called party number can be converted to SIP URI (URI of session initiation protocol) form, then follow-up calling route is carried out in the IMS territory, otherwise, S-CSCF routes the call to the BGCF (Breakout Gateway Control Function borde gateway controlled function) in this IMS territory, to call out finally by BGCF and to route to PSTN (public switched telephone network (PSTN)) or CS territory via MGCF, at last by PSTN or CS territory with call proceeding to called.When the AS with CCCF function enabled the B2BUA function, for the session that stops at CCCF with in the new session of initiating of CCCF, CCCF controlled to switch between the territory that may initiate subsequent user all to its maintenance state.

Because the calling subscriber visits the CS territory on ground and not necessarily supports CAMEL, therefore need consider that other alternative route the call to AS, provide in the standard of 3GPP at present under the end side route control model based on USSD with based on two kinds of mechanism of SIP Notify.

Wherein, USSD mechanism is applied to UE and is not registered to the IMS territory, its basic principle is that UE is when VMSC makes a call, that the called address information in the call signaling is carried is the CCCF PSI that points to the AS with CCCF function, thereby VMSC routes the call to the AS that has the CCCF function in the IMS territory via MGCF.And real called party information, number information as UE (B), be in the USSD signaling that the gsmSCF with NeDS function sends, to carry by UE, like this, after the gsmSCF with NeDS function receives the USSD signaling, carry out alternately with AS with CCCF function, the real called party information of its current session that receives of notice CCCF, it is the number information that carries UE (B) in the USSD signaling, thereby the AS with CCCF function carries out grappling to the calling that the UE that receives initiates, be that AS starts the B2BUA function, stop AS and receive session, initiate a new session at former called party information then, the former called party information here obtains from the USSD signaling that the gsmSCF with NeDS function receives.Subsequent treatment is as described in the step 2-7 of Fig. 2, and the former called party information in the new session of initiating according to AS continues after will talking about and routing to the called subscriber.

When the user in CS territory made a call as caller, if adopt end side route control model, the calling of promptly using USSD mechanism to initiate was toggled to AS and carries out grappling, and then corresponding handling process mainly may further comprise the steps as shown in Figure 3:

Step 3-1, the UE that is registered to VMSC makes a call and sets up Setup message, the called party information of carrying among the setup is a number that comprises CCCF PSI information, and also carry the Call Reference Number that is used for call between unique identification UE and the CCCF that UE distributes in the message, the calling that VMSC initiates UE according to the called number that comprises CCCF PSI information via MGCF/I-CSCF route among the AS with CCCF function (calling that UE is initiated route to have CCCF function AS processing procedure with step 2-4～step 2-6 is similar).

Step 3-2, after UE receives the Call proceeding message that VMSC sends, UE initiates the USSD signaling with application model to VMSC, wherein carry the real called party information of this calling in the USSD signaling, and the Call Reference Number that UE distributes in step 3-1.

Step 3-3, VMSC transmit this USSD signaling to HLR, HLR is to the USSD signaling process functional entity with CCCF function, transmit this USSD signaling as gsmSCF, have the AS that has the CCCF function among the USSD signaling process functional entity of CCCF function and the step 3-1 herein and can be same physical entity; According to the real called party information of calling and the Call Reference Number that carry in the USSD signaling that receives, AS and/or the association of USSD signaling process functional entity with CCCF function go out the session that receives among the step 3-1, and the called party information that step 3-1 is received in the session is updated to the real called party information of calling that the USSD signaling is carried.

Step 3-4, the AS with CCCF function and/or USSD signaling process functional entity receive after called party information in the session upgrades step 3-1, and grappling control (it is similar with step 2-7 to have the AS of CCCF function and/or processing procedure that USSD signaling process functional entity carries out grappling control to session) is carried out in session.

Described SIP Notify mechanism is applied to UE and has been registered to the IMS territory, its basic principle is roughly consistent with USSD mechanism, be that UE is when VMSC makes a call, that the called address information in the call signaling is carried is the CCCF PSI that points to the AS with CCCF function, thereby VMSC routes the call to the AS that has the CCCF function in the IMS territory via MGCF.And real called party information, number information as UE (B), be that UE by the current IMS of being registered to territory carries in the SIP Notify signaling that the AS with NeDS function sends, like this, after the AS with NeDS function receives SIP Notify signaling, carry out alternately with AS with CCCF function, the real called party information of its current session that receives of notice CCCF, it is the number information that carries UE (B) in the SIPNotify signaling, thereby the AS with CCCF function carries out grappling to the calling that the UE that receives initiates, be that AS starts the B2BUA function, stop AS and receive session, initiate a new session at former called party information then, the former called party information here obtains from the SIP Notify signaling that the AS with NeDS function receives.Subsequent treatment is as described in the step 2-7 of Fig. 2, and the former called party information in the new session of initiating according to AS continues after will talking about and routing to the called subscriber.

On the design of present voice business continuity as can be known, the AS with CCCF function will carry out grappling control the IMS territory of this user attaching for all will being sent to this user-dependent call/session of initiating from CS territory or IMS territory, therefore, user for common CS territory makes a call as caller, when realizing that VCC is professional, after the AS that its call path is routed to user attaching IMS territory by force earlier carries out grappling, route the call to callee side by AS again.And when making a call as caller for the VCC user in this CS territory, the control of network side route and two kinds of patterns of end side route control are arranged, for network side route control model, the calling that UE initiates is a common calling at real called party, and the CAMEL ability by network has the grappling that the AS of CCCF function calls out with call re-direction to.For end side route control model, need make amendment to the call logic of terminal, the calling that UE initiates is a special calling at the AS with CCCF function, and real called number is to carry in the USSD signaling that the USSD signaling processing entity with CCCF function sends at follow-up UE, AS and/or USSD signaling processing entity with CCCF function upgrade the called party information of calling out according to the real called party information of carrying in the USSD signaling, then grappling are carried out in calling.

Some local services that exist in the CS territory at present are as urgency traffic and legal monitoring business.

Urgency traffic (dialing flash appeal phone 110,119 etc. as the user) is a kind of special telecommunication service, has defined two class urgency traffics, Type-1 and Type-2 in the standard at present.The calling that the urgent call of Type-1 is meant does not have SIM card on the terminal situation is initiated, carry corresponding indication in the call setup setup message that this moment, UE sent and indicate that this calling is urgent call, VMSC delivers to EC according to setup message urgent call indication with this calling and continues; The urgent call of Type-2 is meant that terminal makes a call in a conventional manner and sets up setup message, what but the called number in the message carried is emergency telephone number, and VMSC continues according to after the called number in the setup message is analyzed EC being delivered in calling.

In order to allow the user who initiates urgent call obtain business as soon as possible, emergence call service has the requirement of comparison strictness to the time delay that continues, therefore, the processing in the standard at present is all local emergency call numbers of configuration in the special number table in the VMSC on caller visit ground, receive the setup message of UE initiation as VMSC after, judge according to the called number in the setup message and to be emergency telephone number, then the urgent call flow processing is carried out in calling, promptly UE is not carried out flow processs such as authentication, encryption, directly route the call to EC.CAMEL is professional owing to call out and need carry out can causing the increase of connecting time alternately with gsmSCF, so can not trigger the CAMEL business when clearly having stipulated urgency traffic in the standard of present 3GPP.Therefore, if UE uses when initiating the emergence call service in CS territory under the network side route control model of CAMEL, calling is can not deliver to the AS that has the CCCF function in the user attaching IMS network to carry out grappling, subsequent voice calls with can not carry out VCC control.

Legal monitoring business is that a kind of supervision is professional.So-called Lawful Interception is meant the needs of release mechanism for law enforcement, and certain communication process is monitored.The implementation procedure of monitoring in the CS territory is at present: listening center is provided with controlled data at MSC (comprising the VMSC/GMSC in this listening center governing category) in advance, listening center comprises controlled sign and controlled event at the controlled data that MSC is provided with, controlled sign can be MSISDN, IMSI or IMEI, controlled event can be to call out relevant incident and/or the irrelevant incident of calling, is used to indicate the MSC monitoring with these MSISDN or IMSI or the relevant incident that calling is relevant and/or calling is irrelevant of IMEI.MSC preserves controlled data, when when the controlled event relevant with controlled sign taken place local exchange, taking place, MSC triggers according to the controlled data of being preserved and monitors, the i.e. calling of initiating or receiving for controlled users, MSC need be established to the speech channel of listening center separately the user's communication delivery of content is gone over; For other calling extraneous events that controlled users is initiated or received, as SMS, MSC then only notifies to the listening center reported event.Because the triggering of monitoring has just been carried out when call setup, therefore, general issuing of controlled data need be finished before call setup.When the user roams, the calling that the release mechanism on visit ground also can be initiated on visit ground the user or receiving to call out monitors, therefore, legal monitoring business also belongs to a kind of local service.When initiating the calling in CS territory under UE uses based on the network side route control model of CAMEL, release mechanism is to carry out Lawful Interception to calling subscriber or the called subscriber in calling out.

Because that considers network support CAMEL ability does not have a generality, promptly the calling subscriber visit ground the CS territory not necessarily support CAMEL, therefore the VCC standard has proposed to use the end side route control model based on USSD/SIP Notify, the replacement scheme that routes to the AS with CCCF function is called out in the CS territory that UE initiates, and this replacement scheme is used for network can not support that UE initiates a kind of arbitrary way that call out in the CS territory under the situation of CAMLE.

But, when UE makes a call in USSD/SIP Notify mode, because the true number of calling that the user dials is that emergency telephone number is to be carried into the AS with CCCF function in USSD or SIP Notify signaling, what carry in the setup signaling that UE initiates is to point to the CCCF PSI that has the AS of CCCF function in the user attaching IMS network, follow-up by AS with the session that receives with receiving USSD or SIP Notify signaling is carried out association, and the called party information in the session is updated to the real number of the calling of carrying among the USSD/SIP Notify.Because the real called party number that the user dials is to be carried into the AS with CCCF function by USSD/SIP Notify signaling, therefore, urgent call for Type-2, the VMSC on caller visit ground can't be a urgent call according to identifying this calling in the setup signaling that receives, calling still can be delivered to the AS that has the CCCF function in the user attaching IMS network and carry out grappling, and subsequent voice calls also can be carried out VCC control.

Therefore, for same VCC user, when it has the CS territory emergent service call of initiating under the network of CAMEL ability, the final calling is to carry out the VCC business, with its CS territory emergent service call of under the network that does not have the CAMEL ability, initiating, the final calling can be carried out the VCC business, caused the inconsistent of user's impression, thereby influenced user experience.In addition, when UE makes a call in USSD/SIP Notify mode, because the real called party number that the user dials is to be carried into the AS with CCCF function by USSD/SIP Notify signaling, what carry in the setup signaling that UE initiates is to point to the CCCF PSI that has the AS of CCCF function in the user attaching IMS network, therefore, the VMSC on caller visit ground can't cause release mechanism can't the real called party user who dial be monitored according to identifying real called number information in the setup signaling that receives.Like this, for same VCC user, when it has the calling in the CS territory of initiating under the network of CAMEL ability, the final calling can be by Lawful Interception, when the calling in its CS territory of under the network that does not have the CAMEL ability, initiating, the final calling can not have been caused under the VCC business inconsistent to the processing of legal monitoring business by Lawful Interception.

Summary of the invention

The invention provides a kind of method and device of calling out of in phone service continuity, handling, when not supporting the network-originated call of CAMEL ability, need transmit the continue problem of time delay of prolongation that called party information exists with the user that solves the VCC business of having contracted in the prior art by asynchronous interactive; Further, solve cause thus under the VCC business inconsistent or influence the problem of user experience to other Business Processing.

The invention provides following technical scheme:

A kind of method of calling out of handling in phone service continuity comprises the steps:

A, circuit domain user make a call, and carry call continuity controlled function public service identity (CCCF PSI) and called user information in this calling;

B, described circuit domain call is converted to the session that comprises described CCCF PSI and called user information sets up request message, and be routed to entity with CCCF function;

C, the described CCCF of having functional entity obtain called party information from described conversation request, and grappling control is carried out in session.

Wherein:

In the steps A, partly carry described CCCF PSI and called user information by the called party information of described call signaling; Perhaps, partly carry described CCCF PSI, carry called user information by other parameters in the call signaling in the called party information of described call signaling.

When the network entity in the circuit domain sends initial address message, carry described CCCF PSI, carry called user information by other parameters in this message in the called part of this message.

The network entity of changing described circuit calling signaling parses the parameter of carrying called user information in the initial address message, CCCF PSI that partly carries according to the called party information in this message and the called user information that parses structure called number pseudo-code, and be carried at session and set up in the request message.

The equipment that receives described calling in the circuit domain further triggers the handling process of forbidding the VCC business when determining can not initiate in this session the VCC business according to the user profile of carrying in calling out.

The handling process of the described VCC of forbidding business comprises: the equipment that receives described calling in the circuit domain further sends the relevant information of forbidding the VCC business to the network entity of the described CCCF of having function; Described network entity with CCCF function is refused this request according to this relevant information when receiving phone service continuity (VCC) request of initiating at this session.

To forbid that by call signaling the relevant information of VCC business sends to the network entity with CCCF function; Perhaps, send the relevant information of forbidding the VCC business by management interface to the network entity of the described CCCF of having function.

Determine that this session can not initiate the situation of VCC business and comprise: the user in this session is during by Lawful Interception, and the business of the user in this session in having initiated to call out.

Described user sends the relevant information of forbidding the VCC business to the network entity with CCCF function during by Lawful Interception after the network entity of accepting legal monitor centers control receives controlled data; Perhaps, directly send the relevant information of forbidding the VCC business by legal monitor centers to network entity with CCCF function.

Further comprise step before the step B:

The equipment that receives described calling in A1, the circuit domain is determining according to the called user information of carrying in calling out whether this user can initiate the VCC business, if route the call to the network entity with signaling translation function, and continue step B; Otherwise, then this calling is routed directly to the called subscriber.

Further comprise step before the step B:

A2, circuit domain receive the network entity of described calling according to described called user information and pre-configured EC information, and whether judge called is urgent center, if then calling is routed directly to urgent center; Otherwise, route the call to network entity, and continue step B with signaling translation function.

After the entity of the described CCCF of having function obtains called party information, according to described called user information and pre-configured EC information judge this called whether be urgent center, if then route the call to urgent center, otherwise, grappling control is carried out in session.

When routing the call to urgent center,, route the call to the nearest EC of customer location according to the corresponding relation of CCCF public service identity and the current position of user.

The network entity of replay call is called out Client-initiated and is routed to the network entity that has call continuity controlled function (CCCF function) in the IMS network in the network, by this network entity grappling control is carried out in session; And

When the network entity of the described CCCF of having function receives phone service continuity (VCC) request of initiating at this session in the described conversation procedure of control, judge whether to forbid this request, if then refuse this request, otherwise, accept this request and carry out subsequent treatment.

Wherein:

When the network entity of described replay call can not be initiated the VCC business in determining this session, further the network entity to the described CCCF of having function sent the relevant information of forbidding the VCC business, by network entity corresponding sign is set.

To forbid that by described call signaling the relevant information of VCC business sends to the network entity with CCCF function; Perhaps, send the relevant information of forbidding the VCC business by management interface to the network entity of the described CCCF of having function.

The user is during by Lawful Interception, sends the relevant information of forbidding the VCC business to the network entity with CCCF function after receiving controlled data by the network entity of accepting legal monitor centers control; Perhaps, directly send the relevant information of forbidding the VCC business by legal monitor centers to network entity with CCCF function.

A kind of terminal equipment comprises:

The call signaling generation module when being used for the VCC service-user and making a call, produces and comprises the call signaling with call continuity controlled function public service identity and called user information;

Transceiver module is connected with described call signaling generation module, is used for the described call signaling that the call signaling generation module produces is sent to network, and receives signaling and business datum from network.

When the present invention initiates the calling of CS territory the user of the VCC business of having contracted, in setup message, carry simultaneously and point to CCCF PSI and real called party information with CCCF function, make entity directly to set up and obtain called address information the request message, thereby can shorten the time delay that continues from session with CCCF function; Simultaneously, the VMSC on caller visit ground can route the call to the IMS territory and carry out grappling according to the CCCF PSI in the setup message, can normally carry out local services such as emergence call service or Lawful Interception according to the called number in the setup message again.

Description of drawings

Fig. 1 is the cross-domain switching controls process of the user of VCC business in a prior art schematic diagram;

Fig. 2 is the flow chart that available technology adopting network controls pattern realizes the VCC business;

Fig. 3 is the flow chart that available technology adopting end side control model realizes the VCC business;

Fig. 4 is for realizing the flow chart of VCC business among the present invention;

Fig. 5 forbids that among the present invention during Lawful Interception UE initiates the flow chart of VCC business;

Fig. 6 forbids that in calling out among the present invention when professional UE initiates the flow chart of VCC business;

Fig. 7 is the structural representation of terminal equipment among the present invention.

Embodiment

In the static anchor point process that realizes continuity service of voice service, in order to make the VCC service-user when the circuit domain of not supporting CAMEL makes a call, application server (AS) with CCCF function can obtain called user information from the conversation request message corresponding with message related to calls, the present invention carries simultaneously in the call signaling (setup message) that subscriber equipment sends and points to CCCF PSI and the real called party information with CCCF function, and be sent to after AS that the IMS territory has a CCCF function carries out grappling by the CS territory, directly set up and obtain called party information the request message and will talk about and route to callee side and continue from this session.

Further, the network equipment on visit ground can normally carry out local services such as emergence call service or Lawful Interception according to the real called party information in the setup message.

Consult shown in Figure 4ly, in not supporting the CS territory of CAMEL, the handling process that subscriber equipment (UE) makes a call is as follows:

Step 4-1, UE send setup message to Visited Mobile Switching Center (VMSC), in the called address information in the setup message that carry is called number pseudo-code (Pseudo called number).

Here, UE constructs Pseudocalled number by the mode of appending real called party information behind CCCF PSI.Construct Pseudo callednumber as the mode that adopts " CCCF PSI+ real called party information ".In addition, consider the length restriction of the called address in the setup message, also can only carry CCCF PSI in the called address information, and carry in real called number other parameters in setup message.

Here, CCCF PSI in the called number pseudo-code can be by AS with CCCF function according to the positional information dynamic assignment at the current place of UE and offer UE, carry out grappling the AS with CCCF function in order to guarantee the calling that UE initiates down from different VMSC can both be routed to according to corresponding CCCF PSI information.

Step 4-2, after the Radio Resource of having set up Calling Side connects, the Callproceeding message that VMSC sends to UE, VMSC is according to the CCCF PSI information of carrying in the called address information in the Setup message that receives then, routes the call to the MGCF in the IMS network of calling subscriber's ownership by IAM message.

In called address information, only carry CCCF PSI, and when carrying in real called number other parameters in setup message, need carry the relevant parameter of real called party number in the IAM message that sends to MGCF.

Step 4-3, MGCF judge when including the CCCF PSI that points to the AS with CCCF function in the called party information in the IAM message, then send INVITE to inquiry CSCF (I-CSCF), the called party information Requested-URI in this message is the TEL URI form of called number pseudo-code.In called address information, only carried CCCF PSI, and when carrying in real called number other parameters in IAM message, MGCF called party information Requested-URI in the INVITE that I-CSCF sends is the TEL URI form of CCCF PSI, and MGCF needs to be carried in real called number other parameters in INVITE in other parameters of IAM and is sent to I-CSCF.

Step 4-4, I-CSCF inquire about routing iinformation according to the called number pseudo-code of TEL URI form among the Requested-URI to HSS, obtain AS address information with the connection of the CCCF PSI part correlation in this called number pseudo-code, the AS address information that promptly has the CCCF function, I-CSCF transmits INVITE to the AS with CCCF function then, and the Requested-URI in this INVITE is the called number pseudo-code of TEL URI form.In order to support HSS can return the AS address information with CCCF function of the CCCF PSI part correspondence in the called number pseudo-code, need the corresponding relation that the CCCF PSI data of configuration TEL-URI form have the AS address information of this CCCF function together in HSS in advance according to the called number pseudo-code of TEL-URI form.Here, can in HSS, define a kind of Wildcard CCCF PSI (the CCCF PSI of wildcard), like this, when I-CSCF uses the called number pseudo-code of TEL-URI form when HSS inquires about routing iinformation, HSS only need partly match Wildcard CCCF PSI according to the CCCF PSI in the called number pseudo-code, just can return the AS address information of the corresponding CCCF of the having function of this Wildcard CCCF PSI to I-CSCF.

In called address information, only carried CCCF PSI, and when carrying in real called number other parameters in IAM message, I-CSCF called party information Requested-URI in the INVITE that the AS with CCCF function sends is the TEL URI form of CCCF PSI, and I-CSCF needs to be carried in real called number other parameters in INVITE in other parameters of IAM and is sent to the AS with CCCF function.

Step 4-5, have called party information that the AS of CCCF function receives and comprise the session of the called number pseudo-code of CCCF PSI information, or receiving called party information comprises CCCF PSI, after the session of carrying in real called party number other parameters in INVITE, grappling control is carried out in session, promptly trigger the B2BUA function, stop AS and receive session, initiate a new session then at former called party information, the AS that promptly has the CCCF function is by obtaining the S-CSCF information of calling subscriber's side with the Sh interface of HSS, then, to have the session that the AS of CCCF function initiates and route to this S-CSCF, and will talk about by this S-CSCF and to route to former callee side at former called party information.

Here, trigger the B2BUA function at AS with CCCF function, when initiating a new session at former called party information, obtain in the real called party information that comprises among the Pseudo called number of the called party information TEL URI form of the former called party information in its session from the INVITE that receives, or obtain in other parameters from the INVITE that receives.

Route the call in the process of former callee side at S-CSCF, when former called party information is the Tel-URI form, S-CSCF carries out ENUM DNS translation function, if original called party number can be converted to the SIPURI form, then follow-up calling route is carried out in the IMS territory, otherwise S-CSCF routes the call to the BGCF in this IMS territory, to call out finally by BGCF and to route to PSTN or CS territory via MGCF, at last by PSTN or CS territory with call proceeding to called.When the AS with CCCF function enabled the B2BUA function, for the session that stops at CCCF with in the new session of initiating of CCCF, CCCF controlled to switch between the territory that may initiate subsequent user all to its maintenance state.

From above-mentioned flow process as can be known, when the VCC service-user makes a call in the CS territory of not supporting CAMEL, it in the call setup message of its transmission the called number pseudo-code that carries CCCF PSI information and real called party information, like this, can route the call to the AS that has the CCCF function in the IMS territory of VCC service-user ownership according to the entity in CCCF PSI information CS territory in the called number pseudo-code and IMS territory and carry out grappling, according to the real called party information in the called number pseudo-code, AS with CCCF function can directly obtain the real called party number information that the VCC service-user makes a call from call signaling, carry out the B2BUA function then, will call out and correctly route to the real called party side and continue.

In addition, when the VCC service-user makes a call with this end side route control mode based on the called number pseudo-code in the CS territory of supporting CAMEL, this moment, VMSC had precedence over processing logic to the called number pseudo-code with the processing logic of CAMEL, being VMSC is triggered to calling among the gsmSCF with NeDS function by Initial DP message according to the VCC CAMEL Subscription Information of Calling Side, and subsequent treatment is with the step 2-3 among Fig. 2～2-7.Like this, when making a call with this end side route control mode in the CS territory of supporting CAMEL, finally be to carry out grappling to route the call to AS with CCCF function based on CAMEL network side route control mode based on the called number pseudo-code for the VCC service-user.Therefore, this end side route control mode based on the called number pseudo-code is with the compatibility that can mutually combine of the network side route control mode based on CAMEL.

According to the end side route control mode based on the called number pseudo-code of the present invention, initiate emergence call service for UE, if operator allows the user to initiate follow-up VCC business, then when the VMSC to caller visit ground carries out data configuration, " CCCF PSI+ emergency telephone number " (appending behind CCCF PSI under the mode of real called party information) or emergency telephone number (under the situation of carrying in real called number other parameters in setup message) can not be configured in the special number table as a kind of local emergency call number, like this, receive the setup message of UE initiation as VMSC after, the AS with CCCF function that directly routes the call in the user attaching IMS territory according to the CCCF PSI in the called number in the setup message carries out grappling, after the AS with CCCF function receives calling, according to the real called party number in the called party information with pre-configured special number table judges that the user dials in the AS with CCCF function is emergency telephone number, then will call out route and return EC.

To call out the grappling way of escape when returning EC at AS with CCCF function, because the AS with CCCF function is when distributing CCCF PSI and when offering UE, the CCCF PSI that distributes can have certain mapping relations with the positional information at the current place of user, therefore the AS with CCCF function can will call out the nearest EC in position that route is gone back to the current place of distance users according to CCCF PSI, so that EC can respond user's request as early as possible, as sends rescue personnel etc.

According to the end side route control mode based on the called number pseudo-code of the present invention, initiate emergence call service for UE, if operator need forbid the user and initiate follow-up VCC business, can carry out data configuration by VMSC, " CCCF PSI+ emergency telephone number " (appending behind CCCFPSI under the mode of real called party information) or emergency telephone number (under the situation of carrying in real called number other parameters in setup message) are configured in the special number table as a kind of local emergency call number on caller visit ground.In the step 2 of above-mentioned flow process, receive the setup message of UE initiation as VMSC after, judge to call out according to the called number in the setup message " CCCF PSI+ emergency telephone number " and be urgent call into this, then the urgent call flow processing is carried out in calling, promptly UE is not carried out flow processs such as authentication, encryption and grappling, directly route the call to EC, promptly no longer carry out step 3 to step 5.Like this, be not anchored owing to call out, subsequent user just can't be carried out the VCC business.

In order to support legal monitoring business, will " CCCF PSI+ by monitoring call out the numbers sign indicating number " (behind CCCF PSI, appending under the mode of real called party information) or monitored number (under the situation of carrying in real called number other parameters in setup message) and be arranged to monitor number; In above-mentioned steps 2, receive the setup message of UE initiation as VMSC after, when judging calling that this called number answers or dial and all need to be carried out Lawful Interception, then can trigger Lawful Interception flow process at the VMSC of caller to the called subscriber by release mechanism according to " CCCF PSI+ real called party number " in the called number in the setup message or " real called party number ".

The VMSC on caller visit ground is known when this calling has been subjected to the Lawful Interception of release mechanism, if this moment, calling UE or network were initiated the VCC business, speech channel in the CS territory is that the speech channel among the caller VMSC will be removed, the speech channel of calling UE will be routed to called from the IMS territory, and the monitoring of carrying out in VMSC so then can not be proceeded.Can not proceed for fear of the monitoring that the calling that is under the listening state causes after the VCC business takes place, can handle the calling that is under the listening state by following dual mode:

First kind of mode: do not carry out grappling control for the circuit domain call that is under the listening state.When using network controls pattern based on CAMLE to realize the anchoring treatment of VCC business, judge the monitoring that this VCC user need be subjected to legal entity at gsmSCF with NeDS function, then do not generate IMRN, directly issuing Continue continues to call out, then subsequent voice calls is routed directly to callee side, can not route on the AS in the IMS territory and carry out grappling with CCCF function, therefore, because the calling of circuit domain is not anchored on the IMS territory, follow-up UE of being or network all can not successfully be initiated the VCC business, thereby can ensure normally carrying out of legal monitoring business.When using end side control model based on the called number pseudo-code to realize the anchoring treatment of VCC business, in the process step 2 of above-mentioned Fig. 4, the VMSC on caller visit ground is for the calling that is under the listening state, then the CCCF PSI in the called number in the setup message is divested, directly route the call to callee side and continue, promptly no longer carry out step 3 to step 5.Like this, for the calling of handling under the listening state, VMSC can not carry out grappling with the AS with CCCF function that it routes in the user attaching IMS territory according to the CCCF PSI in the called number pseudo-code, therefore, follow-up UE of being or network all can not successfully be initiated the VCC business, thereby can ensure normally carrying out of legal monitoring business.

Because when carrying out the VCC business in the early stage, can adopt the method for some configurations to realize the anchoring treatment of circuit domain callee side VCC business in the network, as strengthening to judge whether calling belongs to the user of the VCC business of having contracted, whether need to route the call to the anchoring treatment of IMS territory with the VCC business of realization circuit domain callee side to GMSC or to HSS.For these allocation plans, then can judge promptly whether the callee side VCC user in calling out is subjected to the monitoring of legal entity, if then anchoring treatment is not carried out in this calling by in GMSC or HSS, increasing corresponding the processing.

The second way is for the calling that is under the listening state, to carry out the VCC service request that Session Anchor is controlled the back refusing user's and avoided the follow-up initiation of network.This mode is applicable to the anchoring treatment that realizes the calling/called side VCC business of circuit domain based on the network controls pattern of CAMLE, and the anchoring treatment that realizes circuit domain callee side VCC business based on the end side control model of USSD/SIPNotify, and realize the anchoring treatment of circuit domain callee side VCC business based on allocation plan, and end side control model based on the called number pseudo-code of the present invention realizes the multiple calling anchored modes such as anchoring treatment of circuit domain callee side VCC business.

Consult shown in Figure 5, as follows for its main handling process of the second way:

The VMSC on step 500, caller/called visit ground or the related entities (as GMSC) of caller/called ownership circuit-domain network are judged Client-initiated, and calling has been in listening state, here, the entity that the calling that discovery caller/called subscriber initiates has been in listening state is called controlled MSC.

Step 510, controlled MSC forbid the indication of VCC business accordingly to the AS transmission with CCCF function that caller/called subscriber belongs to the IMS territory, carry the be under an embargo user ID of VCC business of corresponding needs in the indication, as MSISDN, further, can also carry the current call-related information of caller/called subscriber in the indication, as the caller/callee side user ID of calling out.Caller/called subscriber belongs to AS storage that the IMS territory has the CCCF function be under an embargo accordingly user ID and its corresponding call information of VCC business.

Step 520, caller/called subscriber belong to the AS that the IMS territory has the CCCF function and receive the handoff request that comes from caller/called subscriber.

Step 530, the AS with CCCF function judge whether the user who initiates to switch is provided with and forbid the VCC business, if, then carry out step 540, otherwise, carry out step 550.

Step 540, has the handoff request of the AS refusing user's of CCCF function.

Step 550, the AS with CCCF function accept user's handoff request and carry out subsequent treatment (subsequent treatment is identical with existing technology, repeats no more).

Further, when end of calling, the AS with CCCF function discharges previous user ID and its corresponding call information of storing the VCC business that is under an embargo.

In addition, caller/called subscriber belongs to the IMS territory and has the AS of CCCF function user ID and its corresponding call information according to the forbidden VCC business of storage, need to guarantee that network does not allow to trigger the VCC business for being in the user under the listening state, like this, be that UE or network all can not successfully be initiated the VCC business, thereby can ensure normally carrying out of legal monitoring business.

In the above-mentioned second way, when the AS with CCCF function that controlled MSC belongs to the IMS territory to caller/called subscriber sends and to forbid the indication of VCC business accordingly, controlled MSC can send to AS by management interface and forbid the indication of VCC business, promptly when controlled MSC receives the controlled data of listening center setting, according to the controlled sign in the controlled data, promptly need to carry out the user ID of Lawful Interception, judge the ownership IMS network of controlled users, and pass through management interface, send corresponding controlled data as the operation maintenance interface to the AS with CCCF function of controlled users ownership IMS network, AS with CCCF function stores corresponding controlled data, refuses the VCC switching that follow-up controlled users is initiated.

In addition, also can be by listening center directly by the corresponding controlled data of AS synchronized transmission with CCCF function of management interface to controlled users ownership IMS network.By management interface when the AS with CCCF function of controlled users ownership IMS network sends corresponding controlled data, can the AS with CCCF function that controlled users belongs to be transmitted or be distributed to controlled data via one or more intermediate entities.Like this, the AS with CCCF function does not need controlled MSC to carry out the notice of corresponding controlled data in calling, but the VCC of the initiation of the relevant controlled users of the controlled data refusal that directly provides according to listening center switches.

When the AS with CCCF function that belongs to the IMS territory to caller/called subscriber at controlled MSC sends and to forbid the indication of VCC business accordingly, controlled MSC can be by increasing corresponding indication in call signaling, this indication is carried into AS by call signaling with CCCF function, promptly stored the controlled data of listening center setting as controlled MSC, when judging controlled users and making a call, controlled MSC is by increasing corresponding indication in the IAM signaling, when call anchor fixes on the AS with CCCF function, AS is monitored according to the calling that this user is judged in the corresponding indication in the IAM signaling, then refuses the VCC switching that follow-up controlled users is initiated; When controlled MSC has stored the controlled data that listening center is provided with, judging controlled users receives when calling out, controlled MSC is by replying the corresponding indication of increase in the signaling at ACM or ANM, ACM that controlled MSC sends or ANM reply signaling be sent to calling carry out grappling have the AS of CCCF function the time, AS is monitored according to the calling that this user is judged in the corresponding indication in ACM or the ANM signaling, then refuses the VCC switching that follow-up controlled users is initiated.

In addition, mode two proposes carrying out Session Anchor control back refusing user's and avoiding the VCC service request of the follow-up initiation of network not only can be applied to be in calling under the listening state.For the calling of some circuit domain because its business of in calling procedure, having initiated, as MPTY, call waiting, because the IMS territory still can not be supported the processing to these business at present, for the business in these callings, after the user switches to the IMS territory from circuit domain, then can cause interrupting the business in current these callings carried out of user owing to the professional ability deficiency in IMS territory, bring the user bad business impression.Therefore, the method that can adopt mode two to propose equally, in the calling that has activated circuit domain when professional, the AS with CCCF function needs refusing user's and avoids the VCC service request of the follow-up initiation of network.

Consult shown in Figure 6ly, in the calling that has activated circuit domain when professional, the AS with CCCF function needs refusing user's and avoids the main flow process of VCC service request of the follow-up initiation of network as follows:

The VMSC on step 600, caller/called visit ground or the related entities (as GMSC) of caller/called ownership circuit-domain network are judged the business in the calling that the user initiated, as Call Waiting, and MPTY etc.

The VMSC on step 610, caller/called visit ground or the related entities (as GMSC) of caller/called ownership circuit-domain network are forbidden the indication of VCC business accordingly to the AS transmission with CCCF function that caller/called subscriber belongs to the IMS territory, carry the be under an embargo user ID of VCC business of corresponding needs in the indication, as MSISDN, further, can also carry the current call-related information of caller/called subscriber in the indication, as the caller/callee side user ID of calling out.Caller/called subscriber belongs to AS storage that the IMS territory has the CCCF function be under an embargo accordingly user ID and its corresponding call information of VCC business.

Step 620, caller/called subscriber belong to the AS that the IMS territory has the CCCF function and receive the handoff request that comes from caller/called subscriber.

Step 630, the AS with CCCF function judge whether the user who initiates to switch is provided with and forbid the VCC business, if, then carry out step 640, otherwise, carry out step 650.

The handoff request of step 640, AS refusing user's.

Step 650, AS accept user's handoff request and carry out subsequent treatment (subsequent treatment is identical with existing technology, repeats no more).

Caller/called subscriber belongs to the IMS territory and has the AS of CCCF function user ID and its corresponding call information according to the forbidden VCC business of storage, needs to guarantee that network does not allow to trigger the VCC business for being in the user under the service condition in the calling.Like this, be that UE or network all can not successfully be initiated the VCC business, thereby can ensure professional normally carrying out in the calling.

When the AS with CCCF function that belongs to the IMS territory to caller/called subscriber for the VMSC on caller/called visit ground or the related entities (as GMSC) of caller/called ownership circuit-domain network sends and forbids the indication of VCC business accordingly, it can be the mode that MSC is carried into this indication by call signaling the AS with CCCF function, its specific implementation is similar with the method that increases relevant indication information in call signaling in the above-mentioned second way, does not repeat them here.

Accordingly, terminal equipment of the present invention as shown in Figure 7, this terminal equipment comprises a call signaling generation module and transceiver module (it is not shown that all the other finish the module of existing other functions) at least, wherein:

When the call signaling generation module is used for the VCC service-user and makes a call in the CS territory, produce and comprise call signaling with call continuity controlled function public service identity and called user information;

Transceiver module is used for the described call signaling that the call signaling generation module produces is sent to network, and receives signaling and business datum from network.

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, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1, a kind of method of calling out of handling in phone service continuity is characterized in that, comprises the steps:

2, the method for claim 1 is characterized in that, in the steps A, partly carries described CCCF PSI and called user information by the called party information of described call signaling; Perhaps

Partly carry described CCCF PSI in the called party information of described call signaling, carry called user information by other parameters in the call signaling.

3, the method for claim 1 is characterized in that, when the network entity in the circuit domain sends initial address message, carries described CCCF PSI in the called part of this message, carries called user information by other parameters in this message.

4, method as claimed in claim 3, it is characterized in that, the network entity of changing described circuit calling signaling parses the parameter of carrying called user information in the initial address message, CCCF PSI that partly carries according to the called party information in this message and the called user information that parses structure called number pseudo-code, and be carried at session and set up in the request message.

5, as each described method of claim 1 to 4, it is characterized in that, the equipment that receives described calling in the circuit domain further triggers the handling process of forbidding the VCC business when determining can not initiate in this session the VCC business according to the user profile of carrying in calling out.

6, method as claimed in claim 5 is characterized in that, forbids that the handling process of VCC business comprises: the equipment that receives described calling in the circuit domain further sends the relevant information of forbidding the VCC business to the network entity of the described CCCF of having function; Described network entity with CCCF function is refused this request according to this relevant information when receiving phone service continuity (VCC) request of initiating at this session.

7, method as claimed in claim 6 is characterized in that, will forbid that by call signaling the relevant information of VCC business sends to the network entity with CCCF function; Perhaps, send the relevant information of forbidding the VCC business by management interface to the network entity of the described CCCF of having function.

8, method as claimed in claim 5 is characterized in that, determines that this session can not initiate the situation of VCC business and comprise: the user in this session is by Lawful Interception, and the business of the user in this session in having initiated to call out.

9, method as claimed in claim 8 is characterized in that, described user sends the relevant information of forbidding the VCC business to the network entity with CCCF function during by Lawful Interception after the network entity of accepting legal monitor centers control receives controlled data; Perhaps, directly send the relevant information of forbidding the VCC business by legal monitor centers to network entity with CCCF function.

10, as each described method of claim 1 to 4, it is characterized in that, further comprise step before the step B:

11, method as claimed in claim 10 is characterized in that, determines that this session can not initiate the situation of VCC business and comprise: this user is by Lawful Interception, and the business of this user in having initiated to call out.

12, as each described method of claim 1 to 4, it is characterized in that, also comprise step before the step B:

13, as each described method of claim 1 to 4, it is characterized in that, after the entity of the described CCCF of having function obtains called party information, according to described called user information and pre-configured EC information judge this called whether be urgent center, if then route the call to urgent center, otherwise, grappling control is carried out in session.

14, method as claimed in claim 13 is characterized in that, when routing the call to urgent center, according to the corresponding relation of CCCF public service identity and the current position of user, routes the call to the nearest EC of customer location.

15, a kind of method of calling out of handling in phone service continuity is characterized in that, comprises the steps:

16, method as claimed in claim 15, it is characterized in that, when the network entity of described replay call can not be initiated the VCC business in determining this session, further the network entity to the described CCCF of having function sends the relevant information of forbidding the VCC business, by network entity corresponding sign is set.

17, method as claimed in claim 16 is characterized in that, will forbid that by described call signaling the relevant information of VCC business sends to the network entity with CCCF function; Perhaps, send the relevant information of forbidding the VCC business by management interface to the network entity of the described CCCF of having function.

18, method as claimed in claim 16 is characterized in that, determines that this session can not initiate the situation of VCC business and comprise: the user in this session is by Lawful Interception, and the business of the user in this session in having carried out calling out.

19, method as claimed in claim 18 is characterized in that, the user is during by Lawful Interception, sends the relevant information of forbidding the VCC business to the network entity with CCCF function after receiving controlled data by the network entity of accepting legal monitor centers control; Perhaps, directly send the relevant information of forbidding the VCC business by legal monitor centers to network entity with CCCF function.

20, a kind of terminal equipment is characterized in that, comprising: