CN101166295B

CN101166295B - A method, system and device for establishing carrier

Info

Publication number: CN101166295B
Application number: CN2006101402816A
Authority: CN
Inventors: 张恒梁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-10-20
Filing date: 2006-10-20
Publication date: 2010-09-08
Anticipated expiration: 2026-10-20
Also published as: CN101166295A; WO2008049320A1

Abstract

The invention in use for solving issue that in current technique, CSI service control function entity (SCFE) is unable to interact with CSI for CSI service information so as not to use CS being as load in IMS session. The method includes steps: (1) when receiving session request related to CSI terminal, CSI SCFE determines whether CSI service is needed to use; (2) using expansion information of session message to CSI terminal, CSI SCFE transfers the information for indicating whether this session is needed to use CSI service; (3) based on the indication information to establish CS load correspondingly. The invention realizes that CS is utilized as a load in IMS session.

Description

A kind of method, system and device of setting up carrying

Technical field

The present invention relates to the communications field, particularly relate to a kind of method, system and device of setting up carrying.

Background technology

IMS is an IP Multimedia System in the WCDMA network of 3GPP R5/R6 standard definition, is that the 3G mobile network is realized packet voice and grouped data, and the unified multimedia service and the objective network of application are provided.IMS adopts the bearer path of IP packet domain as its control signaling and media delivery, adopts Session Initiation Protocol as call control signalling.In IMS, the user contracting data of IMS concentrates among the HSS to be managed, and business is provided by the application server AS unification, session control is finished by S-CSCF, both separate on network configuration fully, and business is toggled to AS by S-CSCF and handles, but collaborative work between a plurality of AS.The user inserts IMS by current location agent node P-CSCF, session and professional control are then finished by the home domain service node of its registered place, therefore the user can obtain same service at diverse access point, has realized that three that service management, session control and carrying insert separates and provides with the business of access and location independent.

CSI is a research topic in the present 3GPP standard.This problem is paid close attention to is how to combine with IMS territory business the CS territory of 3G is professional.This important function for of research is divided into two stages, i.e. CSI phase1 and CSI phase 2.

CSI phase 2 main focus are how IMS uses the carrying of the circuit carrying in CS territory as its voice conversation, the i.e. problem of CSI terminal and VoIP terminal mutual in its session.

In the prior art, solve and use the framework model of the circuit in CS territory in the IMS session, referring to shown in Figure 1 as the network control scheme of its real-time media bearer.

Under described network control model, CSI service logic control entity is positioned at the AS (ASwith CBCF) in IMS territory.The IMS conversation request that the CSI terminal is initiated is routed to CBCF.CBCF judges need set up the CS carrying, uses the intercommunication mechanism of CS and IMS afterwards, calls out by the CS between MGCF/MGW foundation and the CSI terminal.

Set up differently with the direction of the CS calling of CSI terminal according to CBCF, network control mode again can be concrete is divided into network-to-client direction and client-to-network direction.Wherein the network-to-client direction is meant that the CS call establishment is to initiate from CBCF, to the CSI terminal.The client-to-network direction is meant that the CS call establishment is that CBCF passes through IMS signaling indication CSI terminal, and after the CSI terminal was received Indication message, the CS that is initiated to CBCF called out.

Existing network control mode is a framework that solves CSI phase 2 problems, in this framework, does not show how CBCF and CSI terminal carry out the transmission of information.Such as, the CSI terminal is done when called, how CBCF notifies the CSI terminal to trigger is used CSI service (promptly using the carrying of CS as the IMS real-time media), and when the CSI terminal was done caller, how the CSI terminal notified this terminal of CBCF to wish to use CSI service (promptly using the carrying of CS as the IMS real-time media).

Further, in this architectural schemes, also have some detailed problems to consider and to solve:

Does 1) optimization problem set up of CS carrying: during to roaming network, the CS that how to solve between visit ground and the ownership place carry optimization problem at the CSI terminal roaming?

2) in the CS loading establishing process, how to evade the supplementary service in CS territory this set up the harmful effect problem of process?

Does 3) how CBCF handle session change request?

Summary of the invention

The invention provides a kind of method, system and device of setting up carrying, in order to solve in the prior art CSI service controlled function entity can't with CSI terminal interaction CSI service information, thereby can't in the IMS session, use CS as the problem of carrying.

Further, the visit ground of solution when roaming takes place the CSI terminal and the CS carrying optimization problem between the ownership place.

Further, solve the problem that the CS loading establishing process is subjected to the influence of CS territory supplementary service.

Further, solve prior art the problem of session being changed the processing of request method is not provided.

The inventive method comprises:

A kind of method of setting up carrying comprises the following steps:

When CSI service controlled function entity is received the conversation request relevant with the CSI terminal, judge whether to need to use CSI service; Described CSI service controlled function entity judges whether to need to use CSI service, specifically comprise: when the conference call attribute information is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported double-transmission mode DTM ability information, and when terminal was supported the CSI ability, then CSI service controlled function entity is judged needed to use CSI service;

The extend information of the conversation message between use of CSI service controlled function entity and the CSI terminal is transmitted the indication information whether this session needs to use CSI service;

The corresponding CS that sets up carries according to described indication information.

A kind of method of setting up carrying comprises the following steps:

When CSI service controlled function entity is received the conversation request relevant with the CSI terminal, judge whether to need to use CSI service; Described CSI service controlled function entity judges whether to need to use CSI service, specifically comprise: when the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service; Also or, when the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service;

A kind of system that sets up carrying comprises:

CSI service controlled function entity, when being used to receive the conversation request relevant with the CSI terminal, judging whether needs to use CSI service, and the extend information of the conversation message between use and the CSI terminal is transmitted the indication information whether this session needs to use CSI service; And cooperate the CS between foundation and the CSI terminal to carry; Described CSI service controlled function entity judges whether to need to use CSI service, specifically comprise: when the conference call attribute information is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported double-transmission mode DTM ability information, and when terminal was supported the CSI ability, then CSI service controlled function entity is judged needed to use CSI service;

The CSI terminal is used for the indication information that issues according to CSI service controlled function entity, cooperate set up with CSI controlled function entity between CS carry.

A kind of system that sets up carrying comprises:

CSI service controlled function entity, when being used to receive the conversation request relevant with the CSI terminal, judging whether needs to use CSI service, and the extend information of the conversation message between use and the CSI terminal is transmitted the indication information whether this session needs to use CSI service; And cooperate the CS between foundation and the CSI terminal to carry; Described CSI service controlled function entity judges whether to need to use CSI service, be specially: when the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service; Also or, when the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service;

CSI service controlled function entity of the present invention comprises the following units:

Judging unit when being used to receive the conversation request relevant with the CSI terminal, judges whether to need to use CSI service;

Whether described judgment unit judges needs to use CSI service, is specially:

When the conference call attribute information is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported double-transmission mode DTM ability information, and when terminal was supported the CSI ability, then CSI service controlled function entity is judged needed to use CSI service; Perhaps,

When the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service; Perhaps, when the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service;

First transfer unit, the extend information of the conversation message between use and the CSI terminal, the judged result that described judging unit is made passes to the CSI terminal;

The unit is set up in the one CS carrying, is used to cooperate the CS carrying between foundation and the CSI terminal.

CSI terminal of the present invention comprises the following units:

The indication recognition unit is used for discerning the indication information whether this session needs to use CSI service from the conversation message that CSI service controlled function entity is sent;

Described CSI service controlled function entity judges whether to need to use CSI service, is specially:

The unit is set up in the 2nd CS carrying, be used for know whether use CSI service after, cooperate set up with CSI controlled function entity between CS carry.

Beneficial effect of the present invention is as follows:

In the inventive method, when CSI service controlled function entity is received the conversation request relevant with the CSI terminal, judging whether earlier needs to use CSI service, and the extend information of the conversation message between use and the CSI terminal is transmitted the indication information whether this session needs to use CSI service.Afterwards, if the direction that carrying is set up is the terminal to network direction, then carry according to the CS that described indication information is initiated to CSI service controlled function entity, and set up the CS carrying by the cooperation of CSI service controlled function entity by the CSI terminal; If the direction that carrying is set up is that network arrives the terminal direction, then the CSI terminal is known from described indication information needs to use CSI service, and wait for that CSI service controlled function entity initiation CS carries, CSI service controlled function entity is initiated to the carrying of CSI terminal according to described indication information, and is cooperated by the CSI terminal and to set up the CS carrying.

Thereby realized CSI service controlled function entity and CSI terminal interaction CSI service information, and in the IMS session, used CS as carrying.

Further, set up flow process, the present invention is directed to various concrete business visit ground when roaming takes place the CSI terminal and the CS carrying prioritization scheme between the ownership place are provided respectively based on above-mentioned mutual CSI service information and carrying; Provide respectively and evaded the scheme that the CS loading establishing process is subjected to the supplementary service influence of CS territory; Provide session change processing of request method.

In order to support the inventive method, the present invention also provides a kind of system, CSI service controlled function entity and CSI terminal of setting up carrying.

Description of drawings

Fig. 1 is for using the network architecture diagram of the circuit in CS territory as its real-time media bearer in the existing IMS of the solution session;

Fig. 2 is the inventive method flow chart of steps;

Fig. 3 is method example one signaling process figure;

Fig. 4 is method example two signaling process figure;

Fig. 5 is method example three signaling process figure;

Fig. 6 is method example four signaling process figure;

Fig. 7 is method example five signaling process figure;

Fig. 8 is method example six signaling process figure;

Fig. 9 is a system configuration schematic diagram of the present invention;

Figure 10 is a CSI service controlled function entity structure schematic diagram of the present invention;

Figure 11 is a CSI terminal structure schematic diagram of the present invention.

Embodiment

◆ in order to make between CSI service controlled function entity and the CSI terminal CSI service information alternately, thereby in the IMS session, use CS, with the intercommunication of better realization CS and IMS as carrying.The invention provides a kind of method of setting up carrying,, comprise following key step referring to shown in Figure 2:

S1, CSI service controlled function entity are received the conversation request relevant with the CSI terminal.

The described conversation request relevant with the CSI terminal comprises: point to the request of IMS conversation initial or the session change request of CSI terminal; And request of IMS conversation initial or the session change request initiated by the CSI terminal.

When CSI terminal during as caller, this CSI terminal also can use and CSI service controlled function entity between the SIP INVITE in expansion header field or extended message body transmit the wish information that this session wishes to use CSI service.

S2, CSI service controlled function entity judge whether to need to use CSI service.

● obtain required information.

Described CSI service controlled function entity judges whether to need to use the required information of CSI service to comprise at least: the ability information of CSI terminal, the attribute information of conference call, and the ability information of CS Access Network; Further, also can comprise: the ability information of the IP Access Network at CSI terminal place.

Described CSI service controlled function entity obtains described each information by following manner:

-CSI service controlled function entity obtains the ability information of terminal in the extend information of the registration message of terminal; And

-CSI service controlled function entity obtains the positional information of CSI terminal in the CS territory by the inquiry of ATI interface, and according to described place information inquiry data configuration, to obtain the CS Access Network ability information at the current place of CSI terminal; And

-CSI service controlled function entity obtains the access network type of the current place IMS of CSI terminal by the location field information of carrying in the IMS message, and IP Access Network ability information is obtained in the data query configuration in view of the above; Perhaps, CSI service controlled function entity obtains the positional information of CSI terminal in the IMS territory by the inquiry of ATI interface, and according to described place information inquiry data configuration, to obtain the IP Access Network ability information at the current place of CSI terminal; And

-CSI service controlled function entity joins in the session path of distant terminal and CSI terminal, to obtain the attribute information of this conference call.

● judge whether to need to use CSI service.

CSI service controlled function entity is according to the described information that obtains, use following logic determines whether to need to use CSI service: the attribute information of described conference call is IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported double-transmission mode DTM ability information, and terminal is supported the CSI ability, and then CSI service controlled function entity is judged needs to use CSI service.

Further, if the information that obtains comprises the ability information of the IP Access Network at CSI terminal place, then CSI service controlled function entity is according to described information, also can use following logic determines whether to need to use CSI service: the attribute information of described conference call is IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service; Perhaps, the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service.

The extend information of the conversation message between S3, the use of CSI service controlled function entity and the CSI terminal is transmitted the indication information whether this session needs to use CSI service.

Among the present invention, described CSI service controlled function entity uses the expansion header field of described conversation message or extended message body to transmit the indication information whether this session needs to use CSI service.

Further in specific implementation, the CSI terminal is during as caller, CSI service controlled function entity use and the CSI terminal between SIP 1xx message in expansion header field or extended message body transmit the indication information whether this session needs to use CSI service;

The CSI terminal when called, CSI service controlled function entity use and the CSI terminal between SIPINVITE message in expansion header field or extended message body transmit the indication information whether this session needs to use CSI service.

S4, set up CS carrying according to described indication information is corresponding.

● if showing needs, described indication information uses CSI service, and it is terminal to network direction (client-to-network) that direction is set up in the CS carrying, the CSI terminal of then receiving indication information as called number, is initiated the CS carrying from local terminal CS part to CSI service controlled function entity with the CS territory number of CSI service controlled function entity; CSI service controlled function entity cooperates this CSI terminal to finish the foundation of CS carrying afterwards.

● if showing needs, described indication information uses CSI service, and it is that network arrives terminal direction (network-to-client) that direction is set up in the CS carrying, the CSI terminal of then receiving indication information from described indication information, know need to use CSI service after, wait for that CSI service controlled function entity initiates the CS carrying; Simultaneously, CSI service controlled function entity obtains the CS number that is associated with the IMS of CSI terminal as called number, is initiated to the CS carrying of this CSI terminal; Described afterwards CSI terminal cooperates CSI service controlled function entity to finish the foundation of CS carrying.

Further, the CSI service controlled function entity mode of obtaining the described CS number that is associated with the IMS number of CSI terminal comprises one of following:

-CSI terminal is carried the incidence relation of CS number and IMS number in the expansion header field of registration message or extended message body, so that CSI controlled function entity obtains this information;

-adopt fixing coding rule to make CSI service controlled function entity obtain the another one number (CS number) of this CSI terminal according to a number (IMS number) of CSI terminal;

-CSI service controlled function entity obtains the CS number of the CSI terminal that is associated with CSI terminal IMS number from the configuration data inquiry of this locality.

◆ based on the described flow process of S1 to S4, in the process that the CS carrying is set up, visit ground when roaming takes place the CSI terminal and the CS carrying prioritization scheme between the ownership place have been the present invention further provides, comprise following main contents: if the conversation request that CSI service controlled function entity is received is pointed to the CSI terminal, then can judge whether the CSI terminal roaming in CS territory has taken place according to the circuit domain positional information (as cell id and Location Area Identity) of CSI terminal among the HSS; If roaming taken place, when then the CS carrying that is initiated to this CSI terminal of CSI service controlled function entity is set up, arrive first the CS territory roaming number that HLR gets the CSI terminal, be initiated to the conversation request of this roaming number.The direction that the CS carrying is set up is the terminal to network direction, then the CSI terminal uses the E.164 number that can be routed to roaming place MGCF to be initiated to the CS calling of CSI service controlled function entity, make and call out the MGCF that passes through described roaming place, be routed to CSI service controlled function entity.It is one of following that the mode that the CSI terminal is obtained described E.164 number comprises: CSI service controlled function entity is according to the roaming place at CSI terminal place, the dynamic assignment number information, and inform the CSI terminal; The roaming place at the own perception of CSI terminal place, and according to the relevant prefix information of roaming place information increase.

◆ based on the described flow process of S1 to S4, in the process that the CS carrying is set up, the present invention further provides and evaded the scheme that the CS loading establishing process is subjected to the supplementary service influence of CS territory, comprise following main contents: described CSI service controlled function entity or CSI terminal are when setting up the CS carrying, CS field service information in the conversation message is discerned, and carry out respective handling according to the CS territory business that identifies, to evade the professional harmful effect in this CS territory.

At various concrete business, below provide respectively and evaded the concrete scheme that the CS loading establishing process is subjected to CS territory supplementary service influence.

The described CS of-Ruo territory is professional for number shows the class business, then by CSI service controlled function entity number to the number information of CSI service controlled function entity is set in the related news of issuing the CSI terminal and shows and limit; Perhaps by the CSI terminal after receiving the related news that CSI service controlled function entity is sent, the number information of CSI service controlled function entity is shown that restriction handles.

The described CS of-Ruo territory business is that the calling in CS territory keeps Call Hold, Call Waiting Call Wait, Call Deflexion CD, show Calls to shift ECT, or multi-party conversation MPTY business, then the CSI terminal is when the business operation request of receiving the user, shielding is to the operation of described business, and informs that this user initiates described business in the IMS territory.

The described CS of-Ruo territory business is the locking ODB of operator, the calling locking CB business in CS territory, perhaps called intelligent service Camel business, then, then carry out the configuration of exceeding one's powers of the number of CSI service controlled function entity in the CS territory further if CS carrying direction is the terminal to network direction; Be that network arrives the terminal direction further if direction is set up in the CS carrying, then CSI service controlled function entity is got roaming number to HLR, HLR knows that the initiator who gets roaming number is CSI service controlled function entity, directly returns the roaming number of described CSI terminal to CSI service controlled function entity.

The described CS of-Ruo territory business is the closed user group CUG business in CS territory, is user's group at the CS territory number of CS territory configuration CSI terminal and the CS territory number of CSI service controlled function entity then.

◆ based on the described flow process of S1 to S4, after the CS carrying is set up, the present invention further provides session change processing of request method, comprise following main contents: if CSI service controlled function entity is received session change request, then discern the change type that this session change request shows, and carry out respective handling according to the change type.

At various concrete business, below provide the concrete scheme of handling session change request respectively.

The change type that the session change request that-Ruo CSI service controlled function entity is received shows is the request from the deletion real-time media composition of opposite end, and then CSI service controlled function entity is removed the CS calling of CSI terminal; Perhaps, CSI service controlled function entity notice CSI terminal (CSI service controlled function entity is deleted the indication information of CSI service in the conversation message of issuing the CSI terminal, to show deletion real-time media information) is by the dismounting of CSI terminal initiation to the CS calling.

The change type that the session change request that-Ruo CSI service controlled function entity is received shows is the request from the deletion non-real time media composition of opposite end, then CSI service controlled function entity is initiated to the IMS session change request of CSI terminal, with deletion non-real time media wherein; If do not have other medium composition in the IMS session of CSI terminal, and CSI service controlled function entity and CSI terminal do not exist CS to call out yet, CSI service controlled function entity can remove and the CSI terminal between this IMS session.

The change type that the session change request that-Ruo CSI service controlled function entity is received shows is the request from the deletion non-real time media composition of CSI terminal, and then CSI service controlled function entity sends the session change and asks the opposite end.

The change type that the session change request that-Ruo CSI service controlled function entity is received shows is the request (indication information of CSI terminal deletion CSI service in session change request from the deletion real-time media composition of CSI terminal, show that it will delete the request of real-time media), then CSI service controlled function entity remove with the CSI terminal between the CS calling.

The change type that the session change request that-Ruo CSI service controlled function entity is received shows is the request from the increase real-time media composition of opposite end, and then the CS between foundation of CSI service controlled function entity and the CSI terminal calls out.

The change type that the session change request that-Ruo CSI service controlled function entity is received shows is the request from the increase non-real time media composition of opposite end, then CSI service controlled function entity is initiated to the session change request of the IMS of CSI terminal, to increase the non-real time media composition.

The change type that the session change request that-Ruo CSI service controlled function entity is received shows is the request from the increase real-time media composition of CSI terminal, and then the CS between foundation of CSI service controlled function entity and the CSI terminal calls out.

The change type that the session change request that-Ruo CSI service controlled function entity is received shows is the request from the increase non-real time media composition of CSI terminal, then CSI service controlled function entity is initiated to the IMS session change request of opposite end, to increase the non-real time media composition.

Partly summarize to the method and to finish, below specifically describe the inventive method by six examples.

◆ method example one, CSI terminal (CSI UE) are done when called, and CSI service controlled function entity (CSI-Control) carries the indication that needs to use CSI service in the INVITE extended message.Referring to shown in Figure 3, comprise following concrete steps:

1, the IMS of CSI terminal attaching receives the IMS conversation request, and this request comprises real-time media and non-real time media information.

2, CSI service controlled function entity carries out business logic processing according to relevant information, need set up the CSI terminal and carry real-time media information to the CS of MGW.

3, CSI service controlled function entity sends conversation request to the CSI terminal.Comprise non-real-time service in this request message and require the CSI terminal to initiate the indication information of terminal to network CS carrying.This indication information can transmit by the relevant header field of expansion SIP INVITE.

4, after the CSI terminal was received this conversation request message, the CS that is initiated to CSI service controlled function entity called out.

5, MGCF receives the CS call request of CSI terminal, is mapped to INVITE and sends to CSI service controlled function entity.

6, CSI service controlled function entity sends the 200OK response message to MGCF.

7, MGCF sends to the CSI terminal with the connect message that the 200OK response message is mapped to CS.

8, the CSI terminal sends the 200OK response message.The media information that only comprises MSRP in this response message.

9, CSI service controlled function entity will merge from the CS calling and the IMS session of CSI terminal.

10, the 200OK response message after the transmission of CSI service controlled function entity merges is to callee side.

◆ method example two, when the CSI terminal is done caller, CSI service controlled function entity carry the indication information that needs to use CSI service in 183 message.Referring to shown in Figure 4, comprise following concrete steps:

1, the CSI terminal is initiated the IMS conversation request, and this request comprises real-time media and non-real time media information.This conversation request is routed on the CSI service controlled function entity logical functional entity of IMS network of CSI terminal attaching and controls.

2, CSI service controlled function entity logical functional entity forwards the request to called network.

3, CSI service controlled function entity is received 183 corresponding message of callee side, carry the real-time media information and the non-real time media information of callee side in this message, CSI service controlled function entity carries out business logic processing according to relevant information, needs to adopt terminal to set up the CS carrying to the direction of MGW.

4, CSI service controlled function entity is transmitted 183 response messages and is given the CSI terminal.Comprise non-real-time service in this message and require the CSI terminal to initiate the indication information of terminal to network CS carrying.CSI service controlled function entity can carry this information by the expansion header field of SIP 183 message.

5, after the CSI terminal was received this response message, the CS that is initiated to CSI service controlled function entity called out.

6, MGCF receives the CS call request of CSI terminal, is mapped to INVITE and sends to CSI service controlled function entity.

7, CSI service controlled function entity sends the 200OK response message to MGCF.

8, MGCF sends to the CSI terminal with the connect message that the 200OK response message is mapped to CS.

9, CSI service controlled function entity is received the 200OK response message of callee side.

10, CSI service controlled function entity will merge from the CS calling and the IMS session of CSI terminal.

11, CSI service controlled function entity is transmitted the 200OK response message and is given the CSI terminal.

◆ when method example three, CSI terminal roaming, CSI service controlled function entity is optimized the flow process of CS carrying.Referring to shown in Figure 5, comprise following concrete steps:

1, CSI service controlled function entity is received from other terminal and is initiated the IMS conversation request, and this request comprises the real-time media media information.

2, CSI service controlled function entity logical functional entity carries out logic control.Here, the perception of CSI service controlled function entity entity the CS territory of CSI terminal roaming has taken place.Positional information that CSI service controlled function entity carries in can the location update message according to the CS territory of CSI terminal or the positional information perception among the HLR.

3, CSI service controlled function entity is got the roaming number information in the CS territory of CSI terminal to HLR.

4, CSI service controlled function entity is received the roaming number information in the CS territory of the CSI terminal that HLR returns.

5, CSI service controlled function entity is initiated the conversation request to the BGCF1 in this territory, and the called number information in the request message is the roaming number information of obtaining.

6, the BGCF1 in this territory has selected the BGCF2 of the roaming place at CSI terminal place to jump as next according to called number information.

7, the BGCF2 in the roaming territory at CSI terminal place has selected MGCF2 to jump as next according to called number information.

8, the routing mechanism of MGCF2 by the CS territory sends to the CSI terminal with the call request in CS territory.

9, the CSI terminal is called out the CS territory and is responded.

10, MGCF2 sends 200OK to BGCF2.

11, BGCF2 sends 200OK to BGCF1.

12, BGCF1 sends 200OK to CSI service controlled function entity.

13, CSI service controlled function entity sends 200OK to Calling Side.The CSI terminal is successfully set up the CS carrying with the MGW that visits the territory, and the VoIP carrying is successfully set up in MGW and caller.

◆ method example four, Incoming CB business evade flow process.Referring to shown in Figure 6, comprise following concrete steps:

2, CSI service controlled function entity logical functional entity carries out logic control.Here, the perception of CSI service controlled function entity entity the callee side CB business of CSI terminal.

4, HLR finds it is that CSI service controlled function entity is got roaming number, then walks around the CB business, returns the roaming number information in the CS territory of CSI terminal and gives CSI service controlled function entity.

5, CSI service controlled function entity is initiated the conversation request to the MGCF in this territory, and the called number information in the request message is the roaming number information of obtaining.

6, the routing mechanism of MGCF by the CS territory sends to the CSI terminal with the call request in CS territory.

7, the CSI terminal is called out the CS territory and is responded.

8, MGCF sends 200OK to CSI service controlled function entity.

9, CSI service controlled function entity sends 200OK to Calling Side.The CSI terminal is successfully set up the CS carrying with the MGW that visits the territory, and the VoIP carrying is successfully set up in MGW and caller.

◆ the flow process of method example five, CSI service controlled function entity handles session change, this example are specially handles the flow process that the IMS terminal increases real-time media.Referring to shown in Figure 7, comprise following concrete steps:

1, the CSI terminal has been set up non-real time media with caller IMS terminal and has been connected.

2, opposite end IMS terminal initiation session change request, request increases real-time media to this session.The IMS terminal can ask to increase non-real time media to the session that has existed equally.

3, CSI service controlled function entity carries out the service logic judgement.

4, CSI service controlled function entity is initiated to the conversation request of MGCF, if the IMS terminal request increases non-real time media, then CSI service controlled function entity can be initiated to the session change request of the IMS of CSI terminal this moment.

5, the routing mechanism of MGCF by the CS territory sends to the CSI terminal with the call request in CS territory.

6, the CSI terminal is called out the CS territory and is responded.If what the CSI terminal was received is IMS session change request, then the CSI terminal is replied the IMS conversation request.

7, MGCF sends 200OK to CSI service controlled function entity.

8, CSI service controlled function entity sends 200OK to Calling Side.Real-time media between CSI terminal and the calling terminal increases successfully.If increase the non-real time media composition, then the non-real time media composition increases successfully.

In addition:, also can finish according to similar flow process for the increase media manipulation that the CSI terminal is initiated.

◆ the flow process of method example six, CSI service controlled function entity handles session change, this example is specially the flow process of handling the real-time media of CSI terminal deletion.Referring to shown in Figure 8, comprise following concrete steps:

1, the CSI terminal has been set up multimedia with caller IMS terminal and has been connected.

2, CSI terminal initiation session change request, request deletion real-time media.The CSI terminal can ask to delete non-real time media equally.

4, CSI service controlled function entity is initiated to the session change request of distant terminal.

5, CSI service controlled function entity has been received the session change request responding message of distant terminal.

6, CSI service controlled function entity is initiated to the Bye request of MGCF.If what the CSI terminal was initiated is the request of deletion non-real time media, then CSI service controlled function entity directly returns session change request and gives the CSI terminal.

7, the routing mechanism of MGCF by the CS territory sends to the CSI terminal with the call tear down request in CS territory.

8, the CSI terminal responds CS territory call tear down.

9, MGCF sends 200OK to CSI service controlled function entity.Real-time media between CSI terminal and the calling terminal is deleted successfully.If deletion non-real time media composition, then the non-real time media composition is deleted successfully.

Annotate: if deletion real-time media that opposite end IMS terminal is initiated or deletion non-real time media can adopt similar flow process to finish.

◆ in order to support said method, the present invention also provides a kind of system that sets up carrying, and referring to shown in Figure 9, it comprises: interconnective CSI service controlled function entity and CSI terminal.

Described CSI service controlled function entity, when being used to receive the conversation request relevant with the CSI terminal, judging whether needs to use CSI service, and the extend information of the conversation message between use and the CSI terminal is transmitted the indication information whether this session needs to use CSI service; And cooperate the CS between foundation and the CSI terminal to carry.

Described CSI terminal is used for the indication information that issues according to CSI service controlled function entity, cooperate set up with CSI controlled function entity between CS carry.

◆ referring to shown in Figure 10, comprise in the described CSI service controlled function entity (being CSI service controlled function entity of the present invention): the interconnective judging unit and first transfer unit, and the unit is set up in CS carrying; Further comprise with described judging unit and CS carrying and set up the CS carrying initiation unit that the unit links to each other respectively.

● described judging unit when being used to receive the conversation request relevant with the CSI terminal, judges whether to need to use CSI service.

Judging whether needs to use the required information of CSI service to comprise at least: the ability information of CSI terminal, the attribute information of conference call, and the ability information of CS Access Network; Also can comprise also and comprising: the ability information of the IP Access Network at CSI terminal place.

Described judging unit is according to described information, use following logic determines whether to need to use CSI service: the attribute information of described conference call is IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported double-transmission mode DTM ability information, and terminal is supported the CSI ability, and then CSI service controlled function entity is judged needs to use CSI service.

If described information comprises the ability information of the IP Access Network at CSI terminal place, then described judging unit is according to described information, also can use following logic determines whether to need to use CSI service: the attribute information of described conference call is IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service; Perhaps, the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service.

● described first transfer unit, the extend information (comprising: the expansion header field of conversation message or extended message body) of the conversation message between use and the CSI terminal, the judged result that described judging unit is made passes to the CSI terminal.

In specific implementation, the CSI terminal is during as caller, described first transfer unit use and the CSI terminal between SIP 1xx message in expansion header field or extended message body, the judged result that described judging unit is made passes to the CSI terminal; The CSI terminal when called, described first transfer unit use and the CSI terminal between the SIP INVITE in expansion header field or extended message body, the judged result that described judging unit is made passes to the CSI terminal.

● the unit is initiated in described CS carrying, and being used in CS carrying direction is that network arrives the terminal direction, and described judging unit judges when needing to use CSI service, initiates the CS carrying to described CSI terminal and sets up request, and trigger described CS carrying and set up the unit.

● the unit is set up in described CS carrying, is used to cooperate the CS carrying between foundation and the CSI terminal.

◆ referring to shown in Figure 11, comprise in the described CSI terminal (being CSI terminal of the present invention): the unit is set up in interconnective indication recognition unit and the 2nd CS carrying; Further comprise with indicating recognition unit and the 2nd CS carrying and set up the 2nd CS carrying initiation unit that the unit links to each other respectively; Further also can comprise again: second transfer unit or the 3rd transfer unit, and the 4th transfer unit.

Described indication recognition unit is used for discerning the indication information whether this session needs to use CSI service from the conversation message that CSI service controlled function entity is sent.

The unit is initiated in described the 2nd CS carrying, being used for setting up direction in the CS carrying is the terminal to network direction, and described indication recognition unit is judged when needing to use CSI service, initiates the CS carrying to CSI service controlled function entity and sets up request, and triggers described the 2nd CS carrying and set up the unit.

The unit is set up in described the 2nd CS carrying, be used for know whether use CSI service after, cooperate set up with CSI controlled function entity between CS carry.

Described second transfer unit is used in this CSI terminal during as caller, use with CSI service controlled function entity between the SIP INVITE in expand header field or the extended message body transmits the wish information that this session wishes to use CSI service; Described the 3rd transfer unit is used for when this CSI endpoint registration, carries the CSI ability information in the expansion header field of registration message or extended message body.

Described the 4th transfer unit is used for when this CSI endpoint registration, carries the CS number of this CSI terminal and the incidence relation of IMS number in the expansion header field of registration message or extended message body, so that CSI controlled function entity obtains this information.

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 method of setting up carrying is characterized in that, comprises the following steps:

2. the method for claim 1, it is characterized in that, the CSI terminal is during as caller, this CSI terminal use and CSI service controlled function entity between the SIP INVITE in expansion header field or extended message body transmit the indication information that this session wishes to use CSI service.

3. the method for claim 1 is characterized in that, described CSI service controlled function entity uses the expansion header field of described conversation message or extended message body to transmit the indication information whether this session needs to use CSI service.

4. method as claimed in claim 3 is characterized in that,

The CSI terminal is during as caller, CSI service controlled function entity is after the conversation request of receiving from this CSI terminal, and expansion header field or extended message body in the SIP 1xx message between use and the CSI terminal transmit the indication information whether this session needs to use CSI service;

The CSI terminal is when called, after CSI service controlled function entity was received the conversation request of pointing to this CSI terminal, expansion header field or extended message body in the SIP INVITE between use and the CSI terminal transmitted the indication information whether this session needs to use CSI service.

5. the method for claim 1, it is characterized in that, if described indication information shows needs and uses CSI service, and the CS carrying to set up direction be the terminal to network direction, then the CS that initiates from local terminal CS part to CSI service controlled function entity of this CSI terminal carries;

If described indication information shows needs and uses CSI service, and the CS carrying to set up direction be that network arrives the terminal direction, then the CSI service controlled function entity CS that is initiated to the CSI terminal carries.

6. method as claimed in claim 5 is characterized in that, is the terminal to network direction if direction is set up in the CS carrying, and then this CSI terminal is that called number is initiated the CS loading establishing process with the CS territory number of CSI service controlled function entity;

If it is the terminal to network direction that direction is set up in CS carrying, then this CSI service controlled function entity obtains the CS number that is associated with the IMS of CSI terminal as called number, initiates the CS loading establishing process.

7. method as claimed in claim 6 is characterized in that, it is one of following that the mode that CSI service controlled function entity obtains the described CS number that is associated with the IMS number of CSI terminal comprises:

The CSI terminal is carried the incidence relation of CS number and IMS number in the expansion header field of registration message or extended message body, so that CSI controlled function entity obtains this information;

Adopt fixing coding rule to make CSI service controlled function entity obtain the another one number of this CSI terminal according to a number of CSI terminal;

CSI service controlled function entity obtains the CS number of the CSI terminal that is associated with CSI terminal IMS number from the configuration data inquiry of this locality.

8. the method for claim 1 is characterized in that, also comprises:

If the conversation request received of CSI service controlled function entity is pointed to the CSI terminal, when then the CS carrying that is initiated to this CSI terminal of CSI service controlled function entity is set up, get the CS territory roaming number of CSI terminal to HLR, be initiated to the conversation request of this roaming number.

9. the method for claim 1, it is characterized in that, also comprise: the CS that the CSI terminal uses the E.164 number that can be routed to roaming place MGCF to be initiated to CSI service controlled function entity calls out, and makes and calls out the MGCF that passes through described roaming place, is routed to CSI service controlled function entity.

10. method as claimed in claim 9 is characterized in that, it is one of following that the mode that the CSI terminal is obtained described E.164 number comprises:

CSI service controlled function entity is according to the roaming place at CSI terminal place, the dynamic assignment number information, and inform the CSI terminal;

The roaming place at the own perception of CSI terminal place, and according to the relevant prefix information of roaming place information increase.

11. the method for claim 1, it is characterized in that described CSI service controlled function entity or CSI terminal are discerned the CS field service information in the conversation message when setting up the CS carrying, and carry out respective handling according to the CS territory business that identifies, to evade the professional harmful effect in this CS territory.

12. method as claimed in claim 11, it is characterized in that, if described CS territory is professional for number shows the class business, then number to the number information of CSI service controlled function entity is set in the related news of issuing the CSI terminal and shows and limit by CSI service controlled function entity; Perhaps by the CSI terminal after receiving the related news that CSI service controlled function entity is sent, the number information of CSI service controlled function entity is shown that restriction handles;

If being calling maintenance, Call Waiting, Call Deflexion CD, the show Calls in CS territory, described CS territory business shifts ECT, or multi-party conversation MPTY business, then the CSI terminal shields the operation to described business, and informs that this user initiates described business in the IMS territory when the business operation request of receiving the user;

If described CS territory business is the locking ODB of operator, the calling locking CB business in CS territory, perhaps called intelligent service Camel business, then, then carry out the configuration of exceeding one's powers of the number of CSI service controlled function entity in the CS territory further if CS carrying direction is the terminal to network direction; Be that network arrives the terminal direction further if direction is set up in the CS carrying, then CSI service controlled function entity is got roaming number to HLR, HLR knows that the initiator who gets roaming number is CSI service controlled function entity, directly returns the roaming number of described CSI terminal to CSI service controlled function entity;

If described CS territory business is the closed user group CUG business in CS territory, be user's group then at the CS territory number of CS territory configuration CSI terminal and the CS territory number of CSI service controlled function entity.

13. the method for claim 1, it is characterized in that, also comprise: after session is successfully set up, if CSI service controlled function entity is received session change request, then discern the change type that this session change request shows, and carry out respective handling according to the change type.

14. method as claimed in claim 13, it is characterized in that, if the change type that the session that CSI service controlled function entity is received change request shows is the request from the deletion real-time media composition of opposite end, then CSI service controlled function entity is removed the CS calling of CSI terminal; Perhaps, CSI service controlled function entity notice CSI terminal is by the dismounting of CSI terminal initiation to the CS calling;

If the change type that the session that CSI service controlled function entity is received change request shows is the request from the deletion non-real time media composition of opposite end, then CSI service controlled function entity is initiated to the IMS session change request of CSI terminal, with deletion non-real time media wherein;

If the change type that the session that CSI service controlled function entity is received change request shows is the request from the deletion non-real time media composition of CSI terminal, then CSI service controlled function entity sends the session change and asks the opposite end;

If the change type that the session that CSI service controlled function entity is received change request shows is the request from the deletion real-time media composition of CSI terminal, then the CS between dismounting of CSI service controlled function entity and the CSI terminal calls out;

If the change type that the session that CSI service controlled function entity is received change request shows is the request from the increase real-time media composition of opposite end, then the CS between foundation of CSI service controlled function entity and the CSI terminal calls out;

If the change type that the session that CSI service controlled function entity is received change request shows is the request from the increase non-real time media composition of opposite end, then CSI service controlled function entity is initiated to the session change request of the IMS of CSI terminal, to increase the non-real time media composition;

If the change type that the session that CSI service controlled function entity is received change request shows is the request from the increase real-time media composition of CSI terminal, then the CS between foundation of CSI service controlled function entity and the CSI terminal calls out;

If the change type that the session that CSI service controlled function entity is received change request shows is the request from the increase non-real time media composition of CSI terminal, then CSI service controlled function entity is initiated to the IMS session change request of opposite end, to increase the non-real time media composition.

15. method as claimed in claim 13, it is characterized in that, if the change type that the session that CSI service controlled function entity is received change request shows is the request from the deletion real-time media composition of opposite end, then CSI service controlled function entity is deleted the indication information of CSI service in the conversation message of issuing the CSI terminal, to show deletion real-time media information.

16. method as claimed in claim 13, it is characterized in that, if the change type that the session that CSI service controlled function entity is received change request shows is the request from the deletion real-time media composition of CSI terminal, the indication information of then described CSI terminal deletion CSI service in session change request shows that it will delete the request of real-time media.

17. a method of setting up carrying is characterized in that, comprises the following steps:

18. method as claimed in claim 17 is characterized in that,

CSI service controlled function entity obtains the ability information of terminal in the extend information of the registration message of terminal; And

CSI service controlled function entity obtains the positional information of CSI terminal in the CS territory by the inquiry of ATI interface, and according to described place information inquiry data configuration, to obtain the CS Access Network ability information at the current place of CSI terminal; And

CSI service controlled function entity obtains the access network type of the current place IMS of CSI terminal by the location field information of carrying in the IMS message, and IP Access Network ability information is obtained in the data query configuration in view of the above; Perhaps, CSI service controlled function entity obtains the positional information of CSI terminal in the IMS territory by the inquiry of ATI interface, and according to described place information inquiry data configuration, to obtain the IP Access Network ability information at the current place of CSI terminal; And

CSI service controlled function entity joins in the session path of distant terminal and CSI terminal, to obtain the attribute information of this conference call.

19. as claim 17 or 18 described methods, it is characterized in that, the CSI terminal is during as caller, this CSI terminal use and CSI service controlled function entity between the SIP INVITE in expansion header field or extended message body transmit the indication information that this session wishes to use CSI service.

20. method as claimed in claim 17 is characterized in that, described CSI service controlled function entity uses the expansion header field of described conversation message or extended message body to transmit the indication information whether this session needs to use CSI service.

21. method as claimed in claim 20 is characterized in that,

22. method as claimed in claim 17, it is characterized in that, if described indication information shows needs and uses CSI service, and the CS carrying to set up direction be the terminal to network direction, then the CS that initiates from local terminal CS part to CSI service controlled function entity of this CSI terminal carries;

23. method as claimed in claim 22 is characterized in that, is the terminal to network direction if direction is set up in the CS carrying, then this CSI terminal is that called number is initiated the CS loading establishing process with the CS territory number of CSI service controlled function entity;

24. method as claimed in claim 23 is characterized in that, it is one of following that the mode that CSI service controlled function entity obtains the described CS number that is associated with the IMS number of CSI terminal comprises:

25. method as claimed in claim 17 is characterized in that, also comprises:

26. method as claimed in claim 17, it is characterized in that, also comprise: the CS that the CSI terminal uses the E.164 number that can be routed to roaming place MGCF to be initiated to CSI service controlled function entity calls out, and makes and calls out the MGCF that passes through described roaming place, is routed to CSI service controlled function entity.

27. method as claimed in claim 26 is characterized in that, it is one of following that the mode that the CSI terminal is obtained described E.164 number comprises:

28. method as claimed in claim 17, it is characterized in that, described CSI service controlled function entity or CSI terminal are when setting up the CS carrying, CS field service information in the conversation message is discerned, and carry out respective handling according to the CS territory business that identifies, to evade the professional harmful effect in this CS territory.

29. method as claimed in claim 28, it is characterized in that, if described CS territory is professional for number shows the class business, then number to the number information of CSI service controlled function entity is set in the related news of issuing the CSI terminal and shows and limit by CSI service controlled function entity; Perhaps by the CSI terminal after receiving the related news that CSI service controlled function entity is sent, the number information of CSI service controlled function entity is shown that restriction handles;

30. method as claimed in claim 17, it is characterized in that, also comprise: after session is successfully set up, if CSI service controlled function entity is received session change request, then discern the change type that this session change request shows, and carry out respective handling according to the change type.

31. method as claimed in claim 30, it is characterized in that, if the change type that the session that CSI service controlled function entity is received change request shows is the request from the deletion real-time media composition of opposite end, then CSI service controlled function entity is removed the CS calling of CSI terminal; Perhaps, CSI service controlled function entity notice CSI terminal is by the dismounting of CSI terminal initiation to the CS calling;

32. method as claimed in claim 30, it is characterized in that, if the change type that the session that CSI service controlled function entity is received change request shows is the request from the deletion real-time media composition of opposite end, then CSI service controlled function entity is deleted the indication information of CSI service in the conversation message of issuing the CSI terminal, to show deletion real-time media information.

33. method as claimed in claim 30, it is characterized in that, if the change type that the session that CSI service controlled function entity is received change request shows is the request from the deletion real-time media composition of CSI terminal, the indication information of then described CSI terminal deletion CSI service in session change request shows that it will delete the request of real-time media.

34. a system that sets up carrying is characterized in that, comprising:

35. system as claimed in claim 34 is characterized in that, described CSI service controlled function entity comprises the following units:

36. system as claimed in claim 35 is characterized in that, described CSI service controlled function entity also comprises:

The unit is initiated in the one CS carrying, and being used in CS carrying direction is that network arrives the terminal direction, and described judging unit judges when needing to use CSI service, initiates the CS carrying to described CSI terminal and sets up request, and trigger described CS carrying and set up the unit.

37. system as claimed in claim 35 is characterized in that, described first transfer unit uses the expansion header field or the extended message body of described conversation message, and the judged result that described judging unit is made passes to the CSI terminal.

38. system as claimed in claim 37, it is characterized in that, the CSI terminal is during as caller, described first transfer unit use and the CSI terminal between SIP 1xx message in expansion header field or extended message body, the judged result that described judging unit is made passes to the CSI terminal;

The CSI terminal when called, described first transfer unit use and the CSI terminal between SIPINVITE message in expansion header field or extended message body, the judged result that described judging unit is made passes to the CSI terminal.

39. system as claimed in claim 34 is characterized in that, described CSI terminal comprises the following units:

40. system as claimed in claim 39 is characterized in that, described CSI terminal also comprises:

The unit is initiated in the 2nd CS carrying, being used for setting up direction in the CS carrying is the terminal to network direction, and described indication recognition unit is judged when needing to use CSI service, initiates the CS carrying to CSI service controlled function entity and sets up request, and triggers described the 2nd CS carrying and set up the unit.

41., it is characterized in that described CSI terminal also comprises as claim 39 or 40 described systems:

Second transfer unit is used in this CSI terminal during as caller, use with CSI service controlled function entity between the SIP INVITE in expand header field or the extended message body transmits the indication information that this session wishes to use CSI service;

Perhaps also comprise: the 3rd transfer unit, be used for when this CSI endpoint registration, in the expansion header field of registration message or extended message body, carry the CSI ability information.

42., it is characterized in that described CSI terminal also comprises as claim 39 or 40 described systems:

The 4th transfer unit is used for when this CSI endpoint registration, carries the CS number of this CSI terminal and the incidence relation of IMS number in the expansion header field of registration message or extended message body, so that CSI controlled function entity obtains this information.

43. a system that sets up carrying is characterized in that, comprising:

CSI service controlled function entity, when being used to receive the conversation request relevant with the CSI terminal, judging whether needs to use CSI service, and the extend information of the conversation message between use and the CSI terminal is transmitted the indication information whether this session needs to use CSI service; And cooperate the CS between foundation and the CSI terminal to carry; Described CSI service controlled function entity judges whether to need to use CSI service, be specially: when the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service; Perhaps, when the attribute information of described conference call is an IMS real-time media information, the ability information of CS Access Network is that the CS net of described CSI end side is supported the DTM ability information, terminal is supported the CSI ability, and the ability information of the IP Access Network at described CSI terminal place be for providing the carrying of real time business, and then CSI service controlled function entity is judged needs to use CSI service;

44. system as claimed in claim 43 is characterized in that, described CSI service controlled function entity comprises the following units:

45. system as claimed in claim 44 is characterized in that, described CSI service controlled function entity also comprises:

46. system as claimed in claim 44 is characterized in that, described first transfer unit uses the expansion header field or the extended message body of described conversation message, and the judged result that described judging unit is made passes to the CSI terminal.

47. system as claimed in claim 46, it is characterized in that, the CSI terminal is during as caller, described first transfer unit use and the CSI terminal between SIP 1xx message in expansion header field or extended message body, the judged result that described judging unit is made passes to the CSI terminal;

48. system as claimed in claim 43 is characterized in that, described CSI terminal comprises the following units:

49. system as claimed in claim 48 is characterized in that, described CSI terminal also comprises:

50., it is characterized in that described CSI terminal also comprises as claim 48 or 49 described systems:

51., it is characterized in that described CSI terminal also comprises as claim 48 or 49 described systems:

52. a CSI service controlled function entity is characterized in that, comprises the following units:

Whether described judgment unit judges needs to use CSI service, is specially:

53. entity as claimed in claim 52 is characterized in that, described entity also comprises:

54. a CSI terminal is characterized in that, comprises the following units:

55. CSI terminal as claimed in claim 54 is characterized in that, described terminal also comprises:

56., it is characterized in that described terminal also comprises as claim 54 or 55 described CSI terminals:

57., it is characterized in that described terminal also comprises as claim 54 or 55 described CSI terminals: