CN103491579B

CN103491579B - IMS service calls method, IMS service implementation methods and device

Info

Publication number: CN103491579B
Application number: CN201310447557.5A
Authority: CN
Inventors: 吴鹏程
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-09-25
Filing date: 2013-09-25
Publication date: 2017-06-06
Anticipated expiration: 2033-09-25
Also published as: CN103491579A

Abstract

The embodiment of the invention discloses IMS service calls method, IMS service implementation methods and device, the method includes：Equipment of the core network receives the IMS service call request message that calling subscribe sends, however, it is determined that the wherein SDP information comprising calling subscribe, then transmit the message to called subscriber；If the equipment of the core network receives an IMS service call response messages of called subscriber return, and confirm that called subscriber does not support the media coding format of the calling subscribe according to the response message, the SDP media consultation process between MRF entities and the calling subscribe and between MRF entities and the called subscriber is then triggered by application server, the calling subscribe and the called subscriber is carried out IMS service conversations using the media coding format translation function of MRF entities.The success rate of IMS service conversations can be improved using the present invention.

Description

IMS service calls method, IMS service implementation methods and device

Technical field

The present invention relates to the communications field, more particularly to IMS service calls method, IMS service implementation methods and device.

Background technology

The IMS of current 3GPP protocol definitions（IP Multimedia Subsystem, IP multimedia subsystem）Session is built Vertical process, by SIP（Session Initiation Protocol, session initiation protocol）The SDP of message bearing（Session Description Protocol, Session Description Protocol）Information carries out SDP media negotiations.If different terminals are supported respectively Different media coding formats, then can cause conversation failure.

Figure 1A shows a kind of IMS service calls flow.As shown in Figure 1A, UE1（UE：User Equipment, Yong Hushe It is standby, i.e. terminal）Send call request（INVITE）Message, carries the SDP information of UE1 in message, the SDP information includes UE1 branch The media coding type and port information held, the INVITE is through S-CSCF（Serving Call Session Control Function, service call conversation control entity）It is sent to UE2；UE2 finds out the media coding type that both sides support simultaneously, root The type of coding supported simultaneously according to both sides negotiates the media coding format for needing to use, and constructs SDP letters according to negotiation result Breath, carries the SDP information and is sent to UE1 by 200OK message；UE1 confirms session results, and replys confirmation（ACK）Message, meeting Words are successfully established, and both sides start call.

When the media coding format that calling both sides are supported is inconsistent, media negotiation failure can be caused, so as to cause calling Failure, as shown in Figure 1B, UE2 replys 415 message, and the failure reason value carried in 415 message is " Unsupported Media Type（The medium type do not supported）", 415 message is transmitted to UE1, call failure by S-CSCF.

Fig. 2A shows another IMS service calls flow.As shown in Figure 2 A, UE1 sends call request（INVITE）Disappear Breath, SDP information is not carried in the INVITE, and the INVITE is sent to UE2 through S-CSCF；UE2 believes the SDP of oneself Breath is sent to S-CSCF by 200OK message, and UE1 is sent to by S-CSCF；The media coding class that UE1 is supported simultaneously according to both sides Type, determines the media coding format that both sides use, and constructs SDP information, and carry in confirmation（ACK）Message is sent to through S-CSCF UE2, session establishment success, both sides start call.

When the media coding format that calling both sides are supported is inconsistent, media negotiation failure can be caused, so as to cause calling Failure, as shown in Figure 2 B, UE1 does not find the media coding format that UE1 and UE2 is supported jointly, then UE1 replys Bye message and gives UE2, call failure.

User can frequently encounter the incompatible feelings of both sides' media coding format when being called using multimedia terminal Condition.In the prior art scheme, when calling both sides because in the case that the media coding of each self-supporting is inconsistent to thing, calling meeting Terminate because of SDP media negotiation failures.

There is multiple media type at present, than if any various video type, audio types or other medium types, multimedia The diversity of terminal can cause the different terminals may to support different media coding formats.Meanwhile, media coding format The continuous evolution with computer technology, the development of the communication technology, many new coded formats emerge in an endless stream, occur unavoidably very Many situations of session of leading to the failure because media coding format is failed to consultations, so as to reduce the success rate of session.

The content of the invention

IMS service calls method, IMS service implementation methods and its device are the embodiment of the invention provides, is used to improve IMS The success rate of service conversation.

A kind of IMS service calls method, methods described includes：

Equipment of the core network receives the IMS service call request message that calling subscribe sends, however, it is determined that an IMS SDP information comprising the calling subscribe in service call request message, then send out the IMS service call requests message Give called subscriber；

If the equipment of the core network receives the IMS service call response messages that the called subscriber returns, and root Confirm that called subscriber does not support the media coding format of the calling subscribe according to the IMS service calls response message, then Triggered between MRF entities and the calling subscribe and between the MRF entities and the called subscriber by application server SDP media consultation process, the calling subscribe and the called subscriber is turned using the media coding format of the MRF entities Changing function carries out IMS service conversations.

In such scheme, triggered between MRF entities and the calling subscribe by equipment of the core network and the MRF entities With the SDP media consultation process between the called subscriber, the calling subscribe and the called subscriber is set to utilize the MRF realities The media coding format translation function of body carries out IMS service conversations, so as in the media coding lattice of calling subscribe and called subscriber When formula is inconsistent, media intercommunication is realized by the media coding format translation function of MRF entities, so as to improve IMS business meetings The success rate of words.

In a kind of preferred implementation, the triggering is between MRF and the calling subscribe and the MRF and the quilt The SDP media consultation process between user is, including：

The equipment of the core network triggers the SDP matchmaker between the MRF entities and the calling subscribe by application server Body negotiations process, after SDP media negotiation success of the MRF entities with the calling subscribe, the application server is indicated The calling subscribe is simultaneously added the multimedia conferencing by the MRF entity set-ups multimedia conferencing；

After the multimedia conferencing being added in establishment multimedia conferencing and by the calling subscribe, the application server The SDP media consultation process between the MRF entities and the called subscriber is triggered, in the MRF entities and the called use After the SDP media negotiations success at family, the application server indicates the MRF entities that the called subscriber is added into many matchmakers Know from experience view.

In above-mentioned preferred scheme, by the trigger mechanism of equipment of the core network, and application server and MRF cooperation, it is complete Into MRF and the SDP media negotiations of called subscriber and calling subscribe, technology is realized transforming smaller rationally and to existing network.

Further, the equipment of the core network by application server trigger the MRF entities and the calling subscribe it Between SDP media consultation process, after the SDP media negotiations success of the MRF entities and the calling subscribe, the application clothes Business device indicates the MRF entity set-ups multimedia conferencing and the calling subscribe is added into the multimedia conferencing, including：

The equipment of the core network sends the 2nd IMS service call request message, the 2nd IMS to the application server SDP information and the multimedia conferencing list of the calling subscribe are carried in service call request message, is wrapped in the list of conference Include the information of the calling subscribe and the information of the called subscriber；

The 2nd IMS service call request message is sent to the MRF entities by the application server, so that described MRF entities carry out SDP media negotiations according to the SDP information of the calling subscribe and the SDP information of the MRF entities, and in association After business's success the 2nd IMS service call response messages are sent to the calling subscribe；

The application server receives what the calling subscribe returned according to the 2nd IMS service calls response message After confirmation message, the MRF is indicated to create multimedia conferencing, and the calling subscribe is added into the multimedia conferencing.

In above-mentioned preferred scheme, by the cooperation of application server and MRF, complete MRF and assisted with the SDP media of calling subscribe Business, technology is realized transforming smaller rationally and to existing network.

Further, it is described after adding the multimedia conferencing in establishment multimedia conferencing and by the calling subscribe Application server triggers the SDP media consultation process between the MRF entities and the called subscriber, the MRF entities with After the SDP media negotiations success of the called subscriber, the application server indicates the MRF entities to add the called subscriber Enter the multimedia conferencing, including：

The application server receive that the MRF entities send for showing to successfully create Multimedia session and by institute After stating the response message that calling subscribe adds the multimedia conferencing, sending the 3rd IMS service calls to the called subscriber please Message is sought, and receives the 3rd IMS service call response messages that the called subscriber returns, the 3rd IMS service calls ring Answer the SDP information that the called subscriber is carried in message；

The application server sends the 4th IMS service call request message, the 4th IMS industry to the MRF entities The SDP information of the called subscriber is carried in business request message, so that the MRF entities are believed according to the SDP of the called subscriber The SDP information for ceasing the MRF entities carries out SDP media negotiations；

The application server receives the 4th IMS service call response messages that the MRF is returned, if according to the described 4th IMS service calls response message confirms the SDP media negotiations success of the MRF entities and the called subscriber, it indicates that described The called subscriber is added the multimedia conferencing by MRF entities.

In above-mentioned preferred scheme, by the cooperation of application server and MRF, complete MRF and assisted with the SDP media of called subscriber Business, technology is realized transforming smaller rationally and to existing network.

Further, after the SDP media negotiation failures between the MRF entities and the calling subscribe, also include：It is described The 5th IMS service call response messages that the MRF entities send are sent to the calling subscribe, described by equipment of the core network Five IMS service calls response messages are used to show the MRF with the SDP media negotiation failures of the calling subscribe.The preferred side Case provides the solution under abnormal conditions, makes whole scheme more rationally and complete.

Further, after the SDP media negotiation failures between the MRF entities and the called subscriber, also include：It is described Application server sends the 6th IMS service call response messages to the called subscriber, and respectively to the calling subscribe and institute State MRF entities and send IMS service call ends, the 6th IMS service calls response message is used to show the MRF realities The SDP media negotiation failures of body and the called subscriber.The preferred scheme provides the solution under abnormal conditions, makes whole Scheme is more rationally and complete.

In a kind of preferred implementation, the equipment of the core network sends the 2nd IMS business and exhales to the application server Request message is, including：The equipment of the core network is confirmed whether to allow to provide value-added service for the calling subscribe, if confirming to permit Perhaps for the calling subscribe provides value-added service, then the 2nd IMS service call requests are sent to the application server and is disappeared Breath.

In above-mentioned preferred embodiment, can only for allow use value-added service user, such as the value-added service of having contracted User, there is provided above-mentioned value-added service（I.e. in the case of the media coding Type-Inconsistencies of calling and called User support, by MRF The media coding format translation function of entity realizes the media intercommunication between calling and called user）, on the one hand can be to the increment industry The scope of application of business carries out scale domination, to avoid excessive network signal interaction, on the other hand can also be easy to network Side is managed the application of strategy, in addition, being also convenient for carrying out charging for the value-added service.

In a kind of preferred implementation, methods described also includes：If the equipment of the core network determines an IMS industry The SDP information of the calling subscribe is not included in business call request message, is then passed through the IMS service call requests message Application server is sent to MRF entities, to trigger between the MRF entities and the calling subscribe and the MRF entities with SDP media consultation process between the called subscriber, makes the calling subscribe and the called subscriber utilize the MRF entities Media coding format translation function carry out IMS service conversations.The preferred scheme is not wrapped in being directed to IMS service call request message The situation of the SDP information containing calling subscribe gives solution, makes applicability of the present invention stronger.

Further, it is sent to MRF entities institute through application server by by an IMS service call requests message Triggering, the SDP media consultation process between the MRF entities and the calling subscribe, including：

The first IMS service call request message is sent to the application server by the equipment of the core network, described The first IMS business request informations are sent to the MRF entities by application server, and that the MRF entities are returned One IMS service response messages are sent to the equipment of the core network, carry described in the IMS service call response messages The SDP information of MRF entities；

The first IMS service response messages are sent to the calling subscribe by the equipment of the core network, and by the master The confirmation message for making user return is sent to the application server, and the confirmation message is sent to institute by the application server MRF entities are stated, the SDP information of the calling subscribe is carried in the confirmation message, so that the MRF entities are according to the caller The SDP information of the SDP information of user and the MRF entities carries out SDP media negotiations；

The application server indicates the MRF entity set-ups multimedia conferencing, and the calling subscribe is added described Multimedia conferencing.

Further, it is sent to MRF entities institute through application server by by an IMS service call requests message Triggering, the SDP media consultation process between the MRF entities and the called subscriber, including：

The application server receives the response message that the calling subscribe returns, and returned according to the calling subscribe After response message confirms that the MRF is successful with the SDP media negotiations of the calling subscribe, the 7th is sent to the called subscriber IMS call business request messages, receive the 7th IMS service call response messages that the called subscriber returns, the 7th IMS The SDP information of the called subscriber is carried in service call response message；

The application server sends the 8th IMS service call request message, the 8th IMS industry to the MRF entities The SDP information of the called subscriber is carried in business call request message, so that the MRF entities are according to the called subscriber's The SDP information of SDP information and the MRF entities carries out SDP media negotiations；

After the application server receives the successful response message of negotiation that the MRF entities are returned, the MRF is indicated The called subscriber is added the multimedia conferencing by entity.

Further, the equipment of the core network sends an IMS service call requests message through application server MRF entities are given, including：The equipment of the core network is confirmed whether to allow to provide value-added service for the calling subscribe, and is confirming After allowing to provide value-added service for the calling subscribe, an IMS service call requests message is sent out through application server Give MRF entities.

Further, methods described also includes：In user data table on the equipment of the core network, for increasing of having contracted The IMS service-users of value business set configured information, and the configured information is used to showing that corresponding IMS service-users to have been contracted increasing Value business；Or, the equipment of the core network in IMS service-user registration processes, if from for storing user subscription information Equipment obtains the information of value-added service server, then configured information, the instruction are set in the tables of data of current registered user Information is used to show that corresponding IMS service-users have been contracted value-added service；Or, the equipment of the core network is in IMS service-users In registration process, if obtaining IMS service-users from the equipment for storing user subscription information has contracted the first of value-added service Configured information, then set the second configured information in the tables of data of current registered user, and second configured information is used to show Corresponding IMS service-users have been contracted value-added service；

The equipment of the core network is confirmed whether to allow to provide value-added service for the calling subscribe, including：

Whether the equipment of the core network is provided with for showing increment of having contracted according in the tables of data of the calling subscribe The configured information of business, is confirmed whether to allow to provide value-added service for the calling subscribe.

The method that above-mentioned preferred embodiment provides various signing value-added services, realizes technology of the invention more flexible.

A kind of IMS service calls method, methods described includes：

Equipment of the core network receives the IMS service call request message that calling subscribe sends；

If the equipment of the core network extracts the master from an IMS service call request message of the calling subscribe The SDP information of user is, then an IMS service call requests message is sent to MRF entities through application server, to touch Send out described between MRF entities and the calling subscribe and the SDP media negotiations between the MRF entities and the called subscriber Process, makes the calling subscribe and the called subscriber carry out IMS using the media coding format translation function of the MRF entities Service conversation.

In a kind of preferred implementation, sent out through application server by by an IMS service call requests message Give what MRF entities were triggered, the SDP media consultation process between the MRF entities and the calling subscribe, including：

The first IMS service call request message is sent to the application server by the equipment of the core network, described The first IMS business request informations are sent to the MRF entities by application server, so that the MRF entities are according to The SDP information of the SDP information of calling subscribe and the MRF entities carries out SDP media negotiations, and to the master after consulting successfully User is made to send an IMS service call response messages；

The application server receives the calling subscribe and is returned really according to the IMS service calls response message After recognizing message, the MRF entity set-ups multimedia conferencing is indicated, and the calling subscribe is added into the multimedia conferencing.

In a kind of preferred implementation, sent out through application server by by an IMS service call requests message Give what MRF entities were triggered, the SDP media consultation process between the MRF entities and the called subscriber, including：

The application server receives the response message that the calling subscribe returns, and is returned according to the calling subscribe Response message confirm the MRF and the SDP media negotiations success of the calling subscribe after, send second to the called subscriber IMS call business request messages, receive the 2nd IMS service call response messages that the called subscriber returns, the 2nd IMS The SDP information of the called subscriber is carried in service call response message；

The application server sends the 3rd IMS service call request message, the 3rd IMS industry to the MRF entities The SDP information of the called subscriber is carried in business call request message, so that the MRF entities are according to the called subscriber's The SDP information of SDP information and the MRF entities carries out SDP media negotiations；

In a kind of preferred implementation, the equipment of the core network is by the IMS service call requests message through answering MRF entities are sent to server, including：The equipment of the core network is confirmed whether to allow to provide increment clothes for the calling subscribe Business, and after confirming to allow to provide value-added service for the calling subscribe, by the IMS service call requests message through answering MRF entities are sent to server.

Further, methods described also includes：

In user data table on the equipment of the core network, the IMS service-users for value-added service of having contracted are set Configured information, the configured information is used to show that corresponding IMS service-users have been contracted value-added service；Or

The equipment of the core network is in IMS service-user registration processes, if the equipment from storing user subscription information is used for The information of value-added service server is obtained, then configured information, the configured information are set in the tables of data of current registered user For showing that corresponding IMS service-users have been contracted value-added service；Or

The equipment of the core network is in IMS service-user registration processes, if the equipment from storing user subscription information is used for Obtain IMS service-users to have contracted the first configured information of value-added service, then the is set in the tables of data of current registered user Two configured informations, second configured information is used to show that corresponding IMS service-users have been contracted value-added service；

A kind of IMS service implementation methods realized based on the above method, methods described is included：

Media resource function MRF entities carry out SDP media negotiations with the calling subscribe, and negotiation obtains the first media coding Form；

The MRF entities carry out SDP media negotiations with the called subscriber, and negotiation obtains the second media coding format；

The MRF entities during the IMS service conversations of the calling subscribe and the called subscriber, by the caller The media stream transition of first media coding format of user be the second media coding format Media Stream after be sent to it is described called User, and/or by matchmaker that the media stream transition of second media coding format of the called subscriber is the first media coding format The calling subscribe is sent to after body stream.

In a kind of preferred implementation, methods described also includes：

The MRF entities are consulted to create multimedia conferencing after obtaining the first media coding format with the calling subscribe, and The calling subscribe is added to the multimedia conferencing；

After the MRF entities are consulted to obtain the second media coding format with the called subscriber, the called subscriber is added Enter the multimedia conferencing, the calling subscribe and the called subscriber carry out IMS service conversations by the multimedia conferencing.

In above-mentioned preferred scheme, calling and called Multimedia session is realized by multimedia conferencing mechanism, technology is realized simple easy OK.

Further, after the SDP media negotiation failures between the MRF entities and the calling subscribe, also include：It is described MRF entities send the 2nd IMS service call failure response message to the calling subscribe.There is provided the solution party under abnormal conditions Case.

Further, after the SDP media negotiation failures between the MRF entities and the called subscriber, also include：It is described MRF entities receive the IMS service call ends that the application server sends.There is provided the solution party under abnormal conditions Case.

A kind of equipment of the core network, including：

Call Control Block, the IMS service call request message for receiving calling subscribe's transmission, however, it is determined that described Session Description Protocol SDP information comprising the calling subscribe in first IMS service call request message, then by described first IMS service call request message is sent to called subscriber；

Value-added service trigger module, for receiving the called subscriber returns first in the Call Control Block IMS service call response messages, and confirm that called subscriber does not support the master according to the IMS service calls response message When being the media coding format of user, by application server trigger media resource function MRF entities and the calling subscribe it Between and the SDP media consultation process between the MRF entities and the called subscriber, make the calling subscribe and described called User carries out IMS service conversations using the media coding format translation function of the MRF entities.

In a kind of preferred implementation, the MRF that the value-added service trigger module is triggered and the calling subscribe it Between and the SDP media consultation process between the MRF and the called subscriber, including：

SDP media consultation process between the MRF entities and the calling subscribe is triggered by application server, in institute After stating the SDP media negotiations success of MRF entities and the calling subscribe, the application server indicates the MRF entity set-ups The calling subscribe is simultaneously added the multimedia conferencing by multimedia conferencing；

Further, the value-added service trigger module by the application server specifically for sending the 2nd IMS Described in service call request message trigger between MRF and the calling subscribe and between the MRF and the called subscriber SDP media consultation process, the SDP information of the calling subscribe and many matchmakers are carried in the 2nd IMS service call request message Body list of conference, the list of conference includes the information of the information of the calling subscribe and the called subscriber.

Further, the value-added service trigger module is specifically for being confirmed whether to allow to be provided for the calling subscribe Value-added service, if confirmation allows to provide value-added service for the calling subscribe, described second is sent to the application server IMS service call request message.

In a kind of preferred implementation, the value-added service trigger module is additionally operable to, it is determined that an IMS business When not including the SDP information of the calling subscribe in call request message, by the IMS service call requests message through answering MRF entities are sent to server, to trigger between the MRF entities and the calling subscribe and the MRF entities and institute The SDP media consultation process between called subscriber is stated, makes the calling subscribe and the called subscriber using the MRF entities Media coding format translation function carries out IMS service conversations.

Further, the value-added service trigger module passes through an IMS service call requests message through application Server is sent to what MRF entities were triggered, the SDP media consultation process between the MRF entities and the calling subscribe, bag Include：

The first IMS service call request message is sent to the application server, the application server is by institute State an IMS business request informations and be sent to the MRF entities, and the IMS service responses that the MRF entities are returned are disappeared Breath is sent to the equipment of the core network, and the SDP information of the MRF entities is carried in the IMS service call response messages；

The first IMS service response messages are sent to the calling subscribe, and the calling subscribe is returned really Recognize message and be sent to the application server, the confirmation message is sent to the MRF entities by the application server, described The SDP information of the calling subscribe is carried in confirmation message, so that SDP information of the MRF entities according to the calling subscribe SDP information with the MRF entities carries out SDP media negotiations；

Further, the value-added service trigger module passes through an IMS service call requests message through application Server is sent to what MRF entities were triggered, the SDP media consultation process between the MRF entities and the called subscriber, bag Include：

The response message that the calling subscribe returns is received, and the response message returned according to the calling subscribe confirms institute After stating the SDP media negotiations success of MRF and the calling subscribe, send the 7th IMS call business to the called subscriber and ask Message, receives the 7th IMS service call response messages that the called subscriber returns, and the 7th IMS service calls response disappears The SDP information of the called subscriber is carried in breath；

The 8th IMS service call request message, the 8th IMS service call request message are sent to the MRF entities The middle SDP information for carrying the called subscriber, so that SDP information and the MRF of the MRF entities according to the called subscriber The SDP information of entity carries out SDP media negotiations；

Further, the value-added service trigger module is specifically for being confirmed whether to allow to be provided for the calling subscribe Value-added service, and after confirming to allow to provide value-added service for the calling subscribe, an IMS service call requests are disappeared Breath is sent to MRF entities through application server.

Further, also include：

Configuration module, in user data table, the IMS service-users for value-added service of having contracted to set instruction letter Breath, the configured information is used to show that corresponding IMS service-users have been contracted value-added service；Or

In IMS service-user registration processes, if obtaining value-added service clothes from the equipment for storing user subscription information The information of business device, then set configured information in the tables of data of current registered user, and the configured information is used to show corresponding IMS service-users have been contracted value-added service；Or

In IMS service-user registration processes, if obtaining IMS service-users from the equipment for storing user subscription information Contract the first configured information of value-added service, then the second configured information has been set in the tables of data of current registered user, it is described Second configured information is used to show that corresponding IMS service-users have been contracted value-added service；

The value-added service trigger module is specific to use when being confirmed whether to allow to provide value-added service for the calling subscribe In：Whether the configured information for the value-added service that shows to have contracted is provided with tables of data according to the calling subscribe, is confirmed Whether allow to provide value-added service for the calling subscribe.

A kind of equipment of the core network, including：

Call Control Block, the IMS service call request message for receiving calling subscribe's transmission；

Value-added service trigger module, for being exhaled from an IMS business of the calling subscribe in the Call Control Block Crying when extract the SDP information of the calling subscribe in request message, by an IMS service call requests message through application Server is sent to MRF entities, to trigger between the MRF entities and the calling subscribe and the MRF entities with it is described SDP media consultation process between called subscriber, makes the calling subscribe and the called subscriber using the matchmaker of the MRF entities Body coded format translation function carries out IMS service conversations.

The first IMS service call request message is sent to the application server, the application server is by institute State an IMS business request informations and be sent to the MRF entities, so that the MRF entities are believed according to the SDP of the calling subscribe The SDP information of breath and the MRF entities carries out SDP media negotiations, and sends first to the calling subscribe after consulting successfully IMS service call response messages；

In a kind of preferred implementation, the value-added service trigger module is specifically for being confirmed whether to allow for described Calling subscribe provides value-added service, and after confirming to allow to provide value-added service for the calling subscribe, by an IMS industry Business call request message is sent to MRF entities through application server.

Further, also include：

The value-added service trigger module be confirmed whether to allow for the calling subscribe provides value-added service when specifically use In, whether the configured information for the value-added service that shows to have contracted is provided with the tables of data according to the calling subscribe, confirm Whether allow to provide value-added service for the calling subscribe.

A kind of media resource function MRF entity devices, including：

Media negotiation module, it is and described according to the triggering of equipment of the core network for after calling subscriber calls called subscriber Calling subscribe carries out SDP media negotiations, and negotiation obtains the first media coding format, SDP media association is carried out with the called subscriber Business, negotiation obtains the second media coding format；

Media coding format modular converter, for the IMS service conversation mistakes in the calling subscribe and the called subscriber Cheng Zhong, after the media stream transition by first media coding format of the calling subscribe is the Media Stream of the second media coding format The called subscriber is sent to, and/or is the first matchmaker by the media stream transition of second media coding format of the called subscriber The calling subscribe is sent to after the Media Stream of body coded format.

Further, also include：Conference management module, for consulting with the calling subscribe in the media negotiation module Multimedia conferencing is created after obtaining the first media coding format, and the calling subscribe is added to the multimedia conferencing；With And, after the media negotiation module consults to obtain the second media coding format with the called subscriber, by the called subscriber Add the multimedia conferencing.

Brief description of the drawings

Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these accompanying drawings His accompanying drawing.

Figure 1A, Figure 1B, Fig. 2A, Fig. 2 B are IMS service calls schematic flow sheet in the prior art；

Fig. 3 and Fig. 4 is IMS service calls FB(flow block) provided in an embodiment of the present invention；

Fig. 5 A are the IMS industry of carrying SDP information in the INVITE that calling subscribe provided in an embodiment of the present invention sends Business call signalling flow schematic diagram；

Fig. 5 B and Fig. 5 C are the handling process schematic diagram under the abnormal conditions in flow shown in Fig. 5 A；

Fig. 6 is the IMS industry that SDP information is not carried in the INVITE that calling subscribe provided in an embodiment of the present invention sends Business call signalling flow schematic diagram；

The IMS service call FB(flow block)s that Fig. 7 is provided for another embodiment of the present invention；

The IMS service call signaling process schematic diagrames that Fig. 8 is provided for another embodiment of the present invention；

Fig. 9 is UE register flow paths schematic diagram provided in an embodiment of the present invention；

Figure 10 is one of equipment of the core network structural representation provided in an embodiment of the present invention；

Figure 11 is the two of the structural representation of equipment of the core network provided in an embodiment of the present invention；

Figure 12 is the structural representation of MRF entity devices provided in an embodiment of the present invention.

Specific embodiment

A kind of method and apparatus of IMS service conversations success rate are the embodiment of the invention provides, by the embodiment of the present invention, IMS network can seek AS in the case where calling both sides media coding format is inconsistent（Application Server, should Use server）And MRF（Media Resource Function, media resource function）Entity assists to carry out SDP media negotiations, Media coding format conversion is carried out during IMS service conversations by MRF entities, both sides' media intercommunication is realized.Compiled for media The various multi-media network of code form, the method can improve the success rate of IMS sessions.The embodiment of the present invention can be with existing protocol It is compatible.

The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.

Embodiment one

It is the block diagram of IMS service calls flow provided in an embodiment of the present invention referring to Fig. 3.As illustrated, the flow can be wrapped Include：

Step 301：UE1 sends IMS service call request message as calling subscribe to equipment of the core network, called to call User UE2.

Step 302：Whether the SDP of UE1 is carried in the IMS service call request message that equipment of the core network judgement is received Information, if carrying, is transferred to step 303, otherwise can refer to the flow shown in Fig. 4.

Under normal circumstances, the SDP letters of the calling subscribe are carried in the IMS service call request message that calling subscribe sends Breath.The SDP information may include the media coding type that UE1 is supported.

Step 303：The IMS service call request message is transmitted to UE2 by the equipment of the core network.SDPs of the UE2 according to UE2 The SDP information of the UE1 carried in information and the IMS service call request message, determines that UE2 cannot support that the media of UE1 are compiled Code form, therefore IMS service call failure response message is returned to the equipment of the core network, failure cause is that cannot support that media are compiled Code form.

Step 304：After the equipment of the core network receives the IMS service call failure response message, determine whether to be UE1 Value-added service is provided, if allowing, step 305 is transferred to, step 306 is otherwise transferred to.The value-added service refers to, in called subscriber not When supporting the media coding format of calling subscribe, by MRF entities in calling subscribe and the IMS service conversation processes of called subscriber In, serve as the medium of media coding format conversion, assist calling subscribe and called subscriber to carry out media intercommunication.

In the specific implementation, the value-added service if UE1 has contracted, equipment of the core network confirms to allow to provide increment for UE1 Service.Certainly, network side can also use other modes or the strategy to allow to provide value-added service for which or which kind of UE come regulation, Specific strategy can be formulated according to the demand of network side.

Step 305：The equipment of the core network sends IMS service call request message to AS, with trigger MRF entities and UE1 it Between and the SDP media consultation process between MRF entities and UE2, by SDP media consultation process may negotiate MRF entities with The media coding format used between the media coding format used between UE1, and MRF entities and UE2.For convenience of description, The media coding format used between MRF entities and UE1 is referred to as the first media coding format herein, by MRF entities and UE2 it Between the media coding format that uses be referred to as the second media coding format.

Step 306：The IMS service call failure response message is transmitted to UE1 by the equipment of the core network, and this calling is lost Lose.

It is the block diagram of IMS service calls flow provided in an embodiment of the present invention referring to Fig. 4.As illustrated, the flow can be wrapped Include：

Step 401：UE1 sends IMS service call request message as calling subscribe to equipment of the core network, called to call User UE2.

Step 402：Whether the SDP of UE1 is carried in the IMS service call request message that equipment of the core network judgement is received Information, if not carrying, is transferred to step 403, the otherwise flow shown in reference picture 3.

Step 403：The equipment of the core network determines whether to provide value-added service for UE1, if allowing, is transferred to step 404, otherwise it is transferred to step 405.The value-added service refers to, when called subscriber does not support the media coding format of calling subscribe, By MRF entities during the IMS service conversations of calling subscribe and called subscriber, serve as the medium of media coding format conversion, Assisting calling subscribe and called subscriber carries out media intercommunication.

Step 404：The IMS service call requests message is sent to MRF entities by the equipment of the core network through AS, to trigger SDP media consultation process between MRF entities and UE1 and between the MRF entities and UE2.Can by SDP media consultation process Negotiate the media coding lattice used between the media coding format used between MRF entities and UE1, and MRF entities and UE2 Formula.For convenience of description, the media coding format used between MRF entities and UE1 is referred to as the first media coding format herein, will The media coding format used between MRF entities and UE2 is referred to as the second media coding format.

Step 405：The IMS service call request message that the equipment of the core network sends UE1 is sent to UE2, follow-up process Reference can be made to Fig. 2A（In the case of the SDP media negotiations of UE1 and UE2 are successful）Or Fig. 2 B（In the SDP media negotiations of UE1 and UE2 In the case of failure）.

After allowing to provide value-added service, and the SDP media negotiations success of UE1 and UE2 and MRF inter-entity for UE1, During the IMS service conversations of UE1 and UE2, UE1 uses the first media coding format negotiated with MRF entities to send media MRF entities are flowed to, UE2 uses the second media coding format negotiated with MRF entities to send media and flows to MRF entities.MRF realities Body can by UE1 send the first media coding format media stream transition be the second media coding format Media Stream after be sent to UE2, by UE2 send the second media coding format media stream transition be the first media coding format Media Stream after be sent to UE1, so as in the case of the media coding Type-Inconsistencies that UE1 and UE2 is supported, by the media coding format of MRF entities Translation function realizes the media intercommunication between UE1 and UE2.

In addition, by above-mentioned flow can also be seen that can only for allow use value-added service user, as contracted State the user of value-added service, there is provided above-mentioned value-added service（I.e. calling and called User support media coding Type-Inconsistencies feelings Under condition, the media intercommunication between calling and called user is realized by the media coding format translation function of MRF entities）, on the one hand may be used Scale domination is carried out with the scope of application to the value-added service, to avoid excessive network signal interaction, on the other hand The application of strategy can be managed in order to network side, in addition, being also convenient for carrying out charging for the value-added service.

It is of course also possible to not made a distinction to user, i.e., all provide above-mentioned value-added service to all users.That is, core net After equipment receives the IMS service call failure response message of called subscriber's transmission, increment industry of whether not contracted to calling subscribe Business judged, but directly to AS send IMS service call request message, with trigger between MRF entities and calling subscribe with And the media consultation process between MRF entities and called subscriber, and by the media coding format translation function reality of MRF entities Existing media intercommunication between calling subscribe and called subscriber.

For the clearer above-mentioned flow of description, with reference to Fig. 5 A, Fig. 5 B, Fig. 5 C, Fig. 6, above-mentioned flow is described in detail Signalling interactive process.Wherein, in the scene that Fig. 5 A, Fig. 5 B and the flow of Fig. 5 C descriptions are applicable, the INVITE that UE1 sends disappears Flow during SDP information is carried in breath, in the scene that the flow that Fig. 6 is described is used, is not taken in the INVITE that UE1 sends Band SDP information.

In the network architecture that Fig. 5 A, Fig. 5 B, Fig. 5 C, Fig. 6 flows are applied, it may include S-CSCF, AS and MRF entity, its In, S-CSCF carries out Call- Control1 as equipment of the core network, and AS provides value-added service as the application server of value-added service Control function, MRF entities provide media coding format to be consulted and translation function.It should be noted that in the feelings of not special declaration Under condition, " value-added service " and " value-added service " as described below is consistent with foregoing description.

As shown in Figure 5A, the flow may include：

Step 501：UE1 sends INVITE to S-CSCF（That is IMS service call requests message）, carried in message The SDP information of UE1, the SDP information may include the type of coding that UE1 is supported, may also include port information.

Step 502：S-CSCF addresses UE2 after confirming to carry in the INVITE SDP information of UE1, and should INVITE is sent to UE2.

Step 503：The SDP information that UE2 is checked in the INVITE, judges whether UE2 has the matchmaker of common support with UE1 Body coded format, if it has, the media coding format information that UE1 and UE2 is supported jointly then is sent into UE1, subsequent voice calls into Work(, as shown in Figure 1A.If without the media coding format supported jointly, UE2 replys 415 message（I.e. IMS service calls lose Lose response message）, the failure reason value carried in 415 message is " Unsupported Media Type（The media do not supported Type）”.

Step 504：S-CSCF confirms whether UE1 has contracted value-added service.The value-added service if UE1 has contracted, S- CSCF is constructed and is sent INVITE, to initiate two side's multimedia conferencings to AS.UE1 is carried in the INVITE SDP information and list of conference, the list of conference includes the information of the information of UE1 and UE2.

If the unsigned value-added services of UE1, the flow shown in Figure 1B is referred to, be transmitted to for 415 message by S-CSCF UE1, this call failure.

Step 505：AS forwards the INVITE to MRF entities.

Step 506：MRF entities select the media coding that MRF entities and UE1 are supported jointly according to the SDP information of UE1 Form, and return to 200OK message to AS.The SDP information of MRF is carried in the 200OK message.

If the media coding format that MRF entities and UE1 are not supported jointly, MRF entities reply 415 message to UE1, The failure reason value carried in 415 message is " Unsupported Media Type（The medium type do not supported）", specifically Can be as shown in Figure 5 B.

Step 507：AS sends 200OK message to S-CSCF, and the SDP information of MRF entities is carried in the 200OK message.

Step 508：S-CSCF forwards the 200OK message to UE1.

Step 509：UE1 replys response to S-CSCF（ACK）Message.

Step 510：S-CSCF sends response to AS（ACK）Message.

Step 511：AS sends response to MRF entities（ACK）Message.

So far, MRF entities negotiate the media coding format of common support with UE1, and the first media coding format is used herein Represent the media coding format of the common support that MRF entities are negotiated with UE1.

Step 512：AS sends INFO to MRF entities（That is notification message）, for indicating MRF entity set-up multimedias Meeting, and UE1 is added into the meeting.

Step 513：MRF entities reply 200OK to AS（Confirm）Message.

Step 514：AS initiates INVITE and disappears according to the list of conference carried in the INVITE in step 404, to UE2 Breath, SDP information is not carried in the INVITE.

Step 515：UE2 replys 200OK to AS（Confirm）Message, carries the SDP information of UE2 in the 200OK message, should SDP information may include the media coding format and port information that UE2 is supported.

Step 516：AS sends INVITE to MRF entities, and the SDP information of UE2 is carried in the INVITE, should SDP information may include the media coding format and port information that UE2 is supported.

Step 517：The matchmaker that a kind of MRF entities and UE2 are supported jointly is selected in the coded format that MRF entities are supported from UE2 Body coded format, and distribute the port of MRF entities.MRF entities return to 200OK to AS（Confirm）Information, takes in the 200OK message SDP information with MRF entities.

If the SDP information that MRF entities receive UE2 finds the media coding format do not supported jointly, replied to AS 415 message, the failure reason value carried in 415 message is " Unsupported Media Type（The media class do not supported Type）", AS sends 415 message to UE2, and the failure reason value carried in 415 message is " Unsupported Media Type （The medium type do not supported）", and BYE message is sent to terminate this call flow to UE1 and MRF entities, specifically can be such as figure Shown in 5C.

Step 518：AS replys response to UE2（ACK）Message, carries the SDP information of MRF entities in message.

Step 519：AS replys response to MRF entities（ACK）Message.

So far, MRF entities negotiate the media coding format of common support with UE2, and the second media coding format is used herein Represent the media coding format of the common support that MRF entities are negotiated with UE2.

Step 520：AS sends INFO to MRF entities, and UE2 is added meeting by instruction.

Step 521：MRF entities are to the corresponding 200OK of AS（Confirm）Message.

Hereafter, UE1 and UE2 can carry out media intercommunication by multimedia conferencing.Specifically, UE1 is used being assisted with MRF entities The first media coding format that business goes out sends media and flows to MRF entities, and MRF entities are by the matchmaker of first media coding format of UE1 Body circulation is sent to UE2 after being changed to the data of the second media coding format；UE2 uses the second media negotiated with MRF entities Coded format sends media and flows to MRF entities, and the media stream transition of second media coding format of UE2 is first by MRF entities UE1 is sent to after the Media Stream of media coding format.

It should be noted that shown in above-mentioned Fig. 5 A 503 the step of flow in 415 message also can by one mark " video The 200OK message substitution of falling ".

As shown in fig. 6, the flow may include：

Step 601：Terminal UE 1 sends INVITE to S-CSCF, and SDP information is not carried in message.

Step 602：S-CSCF confirms not carrying SDP information in the INVITE that UE1 sends, and judges whether UE1 signs About value-added service.If having contracted value-added service, the INVITE is sent to corresponding AS；If not contracting increasing Value business, then be sent to UE2 by the INVITE, and follow-up process can refer to Fig. 2A（UE1 and UE2 SDP media negotiations into In the case of work(）Or Fig. 2 B（In the case of the SDP media negotiation failures of UE1 and UE2）Carry out.

Step 603：AS sends INVITE to MRF entities, and SDP information is not carried in message.

Step 604：MRF entities return to 200OK message, and the SDP information of MRF code capacities and port is carried in message.

Step 605：The 200OK message is transmitted to S-CSCF by AS.

Step 606：200OK message is transmitted to UE1 by S-CSCF.

Step 607：After UE1 receives message, the code capacity letter in the SDP contents according to the MRF entities carried in 200OK Breath, finds out a kind of media coding format that itself can also support, the SDP information after consulting is carried in the ACK message replied（Such as SDP UE1 shown in figure）.

Step 608：The ACK message that S-CSCF will carry SDP information after consulting passes to AS.

Step 609：The ACK message is passed to MRF entities by AS.

So far, the SDP media negotiations between UE1 and MRF are completed.The media that MRF entities negotiate common support with UE1 are compiled Code form, represents the media coding format of the common support that MRF entities are negotiated with UE1 with the first media coding format herein.

Step 610：AS constructs and sends INFO after ACK message has been forwarded, and instruction establishment multimedia conferencing simultaneously will UE1 adds the meeting.

Step 611：After MRF entities receive INFO, create multimedia conferencing and add UE1, complete backward AS and reply 200OK message.

Step 612：AS initiates INVITE according to the mark of the UE2 carried in INVITE in step 2 to UE2, SDP information is not carried in message.

Step 613：UE2 replys 200OK to AS（Confirm）Message, carries the SDP information of UE2 in message, the SDP information can Including media coding format and port information that UE2 is supported.

Step 614：AS sends INVITE to MRF entities, and the SDP information of UE2 is carried in message.

Step 615：MRF entities select a kind of MRF according to the SDP information of UE2 in the media coding format supported from UE2 The media coding format that entity and UE2 are supported jointly, and distribute the port at MRF ends.MRF entities return to 200OK to AS（Confirm） Information, carries the SDP information of MRF entities in message.

Step 616：AS replys response to UE2（ACK）Message, carries the SDP information of MRF entities in message.

Step 617：AS replys response to MRF entities（ACK）Message.

Step 618：AS sends INFO to MRF entities, and UE2 is added meeting by instruction.

Step 619：MRF entities are to the corresponding 200OK of AS（Confirm）Message.

Hereafter, UE1 and UE2 can carry out media intercommunication by multimedia conferencing.Specifically, UE1 is used being assisted with MRF entities The first media coding format that business goes out sends media data to MRF entities, and MRF entities are by first media coding format of UE1 Data are sent to UE2 after being converted to the data of the second media coding format；UE2 uses the second media negotiated with MRF entities Coded format sends media data to MRF entities, and the data of second media coding format of UE2 are converted to first by MRF entities UE1 is sent to after the data of media coding format.

The first media coding format that UE1 and MRF entities are negotiated, the second media negotiated with UE2 and MRF entities are compiled Code form, may be identical, and in this case, MRF entities only carry out the forwarding of Media Stream, i.e. the forwarding media stream for sending UE1 To UE2, the forwarding media stream that UE2 is sent is to UE1.

Embodiment two

It is the block diagram of IMS service calls flow provided in an embodiment of the present invention referring to Fig. 7.As illustrated, the flow can be wrapped Include：

Step 701：UE1 sends IMS service call request message as calling subscribe to equipment of the core network, called to call User UE2.

Step 702：Whether the SDP of UE1 is carried in the IMS service call request message that equipment of the core network judgement is received Information, if carrying, is transferred to step 703, can otherwise be transferred to step 705.

Step 703：The equipment of the core network determines whether to provide value-added service for UE1, if allowing, is transferred to step 704, otherwise it is transferred to step 705.The value-added service refers to, when called subscriber does not support the media coding format of calling subscribe, By MRF entities during the IMS service conversations of calling subscribe and called subscriber, serve as the medium of media coding format conversion, Assisting calling subscribe and called subscriber carries out media intercommunication.

Step 704：The IMS service call requests message is sent to MRF entities by the equipment of the core network through AS, to trigger SDP media consultation process between MRF entities and UE1 and between the MRF entities and UE2.Can by SDP media consultation process Negotiate the media coding lattice used between the media coding format used between MRF entities and UE1, and MRF entities and UE2 Formula.For convenience of description, the media coding format used between MRF entities and UE1 is referred to as the first media coding format herein, will The media coding format used between MRF entities and UE2 is referred to as the second media coding format.

Step 705：The IMS service call request message that the equipment of the core network sends UE1 is sent to UE2, follow-up process Reference can be made to Figure 1A（In the case of the SDP media negotiations of UE1 and UE2 are successful）Or Figure 1B（In the SDP media negotiations of UE1 and UE2 In the case of failure）.

For the clearer above-mentioned flow of description, with reference to Fig. 8, the signalling interactive process of above-mentioned flow is described in detail. Wherein, in the scene that the flow of Fig. 8 descriptions is applicable, flow during SDP information is carried in the INVITE that UE1 sends.

In the network architecture that Fig. 8 flows are applied, it may include S-CSCF, AS and MRF entity, wherein, S-CSCF is used as core Heart net equipment carries out Call- Control1, and AS provides the control function of value-added service, MRF entities as the application server of value-added service Media coding format is provided to consult and translation function.It should be noted that in the case of not special declaration, it is as described below " value-added service " and " value-added service " is consistent with foregoing description.

As shown in figure 8, the flow may include：

Step 801：Terminal UE 1 sends to S-CSCF and calls（INVITE）Message, carries the SDP letters of UE1 constructions in message Breath.

Step 802：S-CSCF confirms the SDP information of carrying UE1 in the INVITE, then whether S-CSCF judges UE1 Contract value-added service.If having contracted value-added service, the INVITE is sent to corresponding AS by S-CSCF；If not yet There is signing value-added service, then the INVITE is sent to UE2, follow-up process can refer to Figure 1A（In the SDP matchmaker of UE1 and UE2 In the case of body is consulted successfully）Or Figure 1A（In the case of the SDP media negotiation failures of UE1 and UE2）Carry out.

Step 803：AS sends INVITE to MRF, and the SDP information of UE1 in step 621 is carried in message.

Step 804：MRF entity inspections receive SDP information, find out the media coding lattice that UE1 and MRF entities are supported jointly Formula, constructs SDP information, and AS is carried to by 200OK message.MRF code capacities and port information are may include in SDP information.

Step 805：The 200OK message is transmitted to S-CSCF by AS.

Step 806：200OK message is transmitted to UE1 by S-CSCF.

Step 807：After UE1 receives 200OK message, confirm to reply ACK message.

Step 808：ACK message is passed to AS by S-CSCF.

Step 809：The ACK message is passed to MRF entities by AS.

Step 810：AS constructs INFO after ACK message has been forwarded, and indicates to create multimedia conferencing and add UE1.

Step 811：After MRF receives INFO, create multimedia conferencing and add UE1, complete backward AS and reply 200OK Message.

Step 812：The mark of the UE2 that AS is carried according to the INVITE in step 622, initiates to call to UE2 （INVITE）, SDP information is not carried in message.

Step 813：UE2 replys 200OK to AS（Confirm）Message.The SDP information of UE2 is carried in message, the SDP information can Including media coding format and port information that UE2 is supported.

Step 814：AS sends to MRF entities and calls（INVITE）Message, carries the SDP information of UE2 in message.

Step 815：Selected in the media coding format that MRF entities are supported according to the SDP information of UE2 from UE2 MRF entities and The media coding format that UE2 is supported jointly, and distribute the port at MRF ends.MRF entities return to 200OK to AS（Confirm）Information, disappears The SDP information of MRF entities is carried in breath.

Step 816：AS replys response to UE2（ACK）Message, carries the SDP information of MRF entities in message.

Step 817：AS replys response to MRF entities（ACK）Message.

Step 818：AS sends INFO to MRF entities, and UE2 is added meeting by instruction.

Step 819：MRF entities are to the corresponding 200OK of AS（Confirm）Message.

Hereafter, UE1 and UE2 can carry out media intercommunication by multimedia conferencing.Specifically, UE1 is used being assisted with MRF entities The first media coding format that business goes out sends media and flows to MRF entities, and MRF entities are by the matchmaker of first media coding format of UE1 Body circulation is sent to UE2 after being changed to the Media Stream of the second media coding format；UE2 uses the second matchmaker negotiated with MRF entities Body coded format sends media and flows to MRF entities, and the media stream transition of second media coding format of UE2 is the by MRF entities UE1 is sent to after the Media Stream of one media coding format.

In above-mentioned each flow of the embodiment of the present invention, equipment of the core network（Such as S-CSCF）Can be judged by following several ways Whether calling subscribe UE1 has contracted value-added service：

Mode 1：In the user data table of S-CSCF, the IMS service-users for value-added service of having contracted set instruction Information, the configured information is used to show that corresponding IMS service-users have been contracted value-added service.If S-CSCF passes through user data Table, confirms to be provided with the configured information in the user data of UE1, then confirm that UE1 has contracted value-added service.

Mode 2：S-CSCF is in IMS service-user registration processes, if the equipment from storing user subscription information is used for, such as HSS（Home Subscriber Server, home subscriber server）, the information of the AS for performing value-added service is obtained, then Configured information is set in the tables of data of current registered user, the configured information is used to show corresponding IMS service-users signing Value-added service.If S-CSCF is by user data table, confirm to be provided with the configured information in the user data of UE1, then really Recognize UE1 to have contracted value-added service.

Fig. 9 shows UE1 register flow paths.In UE1 registration processes, in the interaction of step 916 and step 917, S- CSCF passes through Server-Assignment-Request（Server assignment request）Message is to HSS request AS distribution information, HSS By Server-Assignment-Answer（Server-assignment is responded）Message returns to AS distribution information to S-CSCF.If The information of the corresponding AS of above-mentioned value-added service is carried in the Server-Assignment-Answer message that HSS is returned, then S- CSCF sets configured information in the tables of data of UE1, and the configured information is used to show that corresponding IMS service-users have been contracted increment Business.Subsequently in step 921 and step 922, S-CSCF is registered to the corresponding AS of above-mentioned value-added service.

Mode 3：S-CSCF is in IMS service-user registration processes, if the equipment from storing user subscription information is used for, such as HSS, obtains IMS service-users and has contracted the first configured information of value-added service, then set in the tables of data of current registered user The second configured information is put, second configured information is used to show that corresponding IMS service-users have been contracted value-added service.If S- CSCF confirms to be provided with the configured information in the user data of UE1 by user data table, then confirm that UE1 has contracted increment industry Business.

Still by taking the register flow path of the UE1 shown in Fig. 9 as an example, in the interaction of step 906 and step 907, S-CSCF By Multimedia-Auth-Request（Multimedia authentication request）Message carries out multimedia authentication to HSS requests, and HSS leads to Cross Multimedia-Auth-Answer（Multimedia Authentication Response）Message returns to authenticating result to S-CSCF.If returned in HSS The configured information of signing value-added service is carried in the Multimedia-Auth-Answer message returned, then numbers of the S-CSCF in UE1 According to setting configured information in table, the configured information is used to showing that corresponding IMS service-users to have been contracted value-added service.Wherein, HSS In for UE1 set signing value-added service configured information, can be by BOSS（Business&Operation Support System, business operation support system）Or other method setting.

During specific implementation, can be in the 7.1.1 chapters and sections Defining a new feature of 3GPP TS29.229V10.3.0 （The new features of definition）One new characteristic of middle increase, such as " Value-addedService1Falg（Value-added service flag bit）”：

Table7.1.1:Features of Feature-List-ID1used in Cx（Characteristic row in Cx interface The characteristic value of table mark）

Value-addedService1Falg（The flag bit of value-added service 1）To disappear in Multimedia-Auth-Answer Supported-Features in breath（The feature of support）Middle carrying.S- can be passed to by HSS in multiple processes of Cx CSCF.This flag bit is write user-related data by S-CSCF.If the flag set, S-CSCF is on stream UE Corresponding value-added service can be triggered.

In sum, the embodiment of the present invention, on the one hand, the meeting that can be caused because of media negotiation failure by network side pair Words failure, IMS network selectively can provide media coding Transformation Service using AS and MRF, improve session success rate；Separately On the one hand, by the differentiation to user's value-added service, reach it is distinguishing for some contracted users provide this be conducive to improve The business of session percent of call completed, can enrich the diversity of business；Another further aspect, the method that the embodiment of the present invention is used is to terminal For lose, on the basis of Consumer's Experience is not influenceed, lifted network performance.Meanwhile, the embodiment of the present invention and existing association View and existing network technical scheme do not conflict, and soon can be generalized in existing network.

It can be seen that, the embodiment of the present invention is the one of the IMS conversation failures that the media negotiation failure higher to probability of occurrence is caused Plant solution.Value-added service is provided the user by the way that network side is distinguishing, the effect for improving user conversation success rate is reached. Network can be enriched to the distinguishing offer business of user by the program, while proposing optimization side to common conversation failure Case.Simultaneously because the program can be compatible with existing protocol and existing network scheme.

Based on identical technology design, the embodiment of the present invention additionally provides equipment of the core network, MRF entity devices.

It is the structural representation of equipment of the core network provided in an embodiment of the present invention referring to Figure 10, the equipment of the core network can be answered For the flow shown in embodiment one, the equipment of the core network can be S-CSCF, as illustrated, the equipment of the core network may include：

Call Control Block 1001, the IMS service call request message for receiving calling subscribe's transmission, however, it is determined that Session Description Protocol SDP information comprising the calling subscribe in the first IMS service call request message, then by described the One IMS service call request message is sent to called subscriber；

Value-added service trigger module 1002, for receive that the called subscriber returns in the Call Control Block the One IMS service call response messages, and according to IMS service calls response message confirmation called subscriber does not support During the media coding format of calling subscribe, media resource function MRF entities and the calling subscribe are triggered by application server Between and the SDP media consultation process between the MRF entities and the called subscriber, make the calling subscribe and the quilt Be user carries out IMS service conversations using the media coding format translation function of the MRF entities.

Specifically, between the MRF that is triggered of value-added service trigger module 1002 and the calling subscribe and the MRF with SDP media consultation process between the called subscriber, including：

Further, value-added service trigger module 1002 can be exhaled by sending the 2nd IMS business to the application server Request message is made to trigger between the MRF and the calling subscribe and the SDP media between the MRF and the called subscriber Negotiations process, carries SDP information and the multimedia conferencing row of the calling subscribe in the 2nd IMS service call request message Table, the list of conference includes the information of the information of the calling subscribe and the called subscriber.

Further, value-added service trigger module 1002 can be confirmed whether to allow to provide increment clothes for the calling subscribe Business, if confirmation allows to provide value-added service for the calling subscribe, the 2nd IMS business is sent to the application server Call request message.

In a kind of preferred scheme, value-added service trigger module 1002 can also be it is determined that an IMS service calls please When seeking in message the SDP information not comprising the calling subscribe, by the IMS service call request message through application service Device is sent to MRF entities, to trigger between the MRF entities and the calling subscribe and the MRF entities are called with described SDP media consultation process between user, makes the calling subscribe and the called subscriber be compiled using the media of the MRF entities Code form translation function carries out IMS service conversations.

Further, value-added service trigger module 1002 passes through an IMS service call requests message through application Server is sent to what MRF entities were triggered, the SDP media consultation process between the MRF entities and the calling subscribe, bag Include：

Further, value-added service trigger module 1002 passes through an IMS service call requests message through application Server is sent to what MRF entities were triggered, the SDP media consultation process between the MRF entities and the called subscriber, bag Include：

Further, value-added service trigger module 1002 can be confirmed whether to allow to provide increment clothes for the calling subscribe Business, and after confirming to allow to provide value-added service for the calling subscribe, by the IMS service call requests message through answering MRF entities are sent to server.

Further, the equipment may also include：Configuration module 1003, in user data table, for increasing of having contracted The IMS service-users of value business set configured information, and the configured information is used to showing that corresponding IMS service-users to have been contracted increasing Value business；Or, in IMS service-user registration processes, if obtaining increment industry from the equipment for storing user subscription information The information of business server, then set configured information in the tables of data of current registered user, and the configured information is used to show right The IMS service-users answered have been contracted value-added service；Or, in IMS service-user registration processes, if being signed from for storing user About the equipment of information obtains IMS service-users and has contracted the first configured information of value-added service, then in the number of current registered user According to setting the second configured information in table, second configured information is used to showing that corresponding IMS service-users to have been contracted increment industry Business.Accordingly, value-added service trigger module 1002 is when being confirmed whether to allow to provide value-added service for the calling subscribe, according to Whether the configured information for the value-added service that shows to have contracted is provided with the tables of data of the calling subscribe, is confirmed whether to allow For the calling subscribe provides value-added service.

It is the structural representation of equipment of the core network provided in an embodiment of the present invention referring to Figure 11, the equipment of the core network can be answered For the flow shown in embodiment two, the equipment of the core network can be S-CSCF, as illustrated, the equipment of the core network may include：

Call Control Block 1101, the IMS service call request message for receiving calling subscribe's transmission；

Value-added service trigger module 1102, in the Call Control Block from the IMS industry of the calling subscribe When extracting the SDP information of the calling subscribe in business call request message, by IMS service call requests message warp Application server is sent to MRF entities, to trigger between the MRF entities and the calling subscribe and the MRF entities with SDP media consultation process between the called subscriber, makes the calling subscribe and the called subscriber utilize the MRF entities Media coding format translation function carry out IMS service conversations.

Specifically, being touched by the way that the first IMS service call requests message is sent into MRF entities through application server Hair, the SDP media consultation process between the MRF entities and the calling subscribe, including：

Specifically, being touched by the way that the first IMS service call requests message is sent into MRF entities through application server Hair, the SDP media consultation process between the MRF entities and the called subscriber, including：

Further, may also include：Configuration module 1103, in user data table, for value-added service of having contracted IMS service-users configured information is set, the configured information is used to show that corresponding IMS service-users have been contracted increment industry Business；Or, in IMS service-user registration processes, if obtaining value-added service clothes from the equipment for storing user subscription information The information of business device, then set configured information in the tables of data of current registered user, and the configured information is used to show corresponding IMS service-users have been contracted value-added service；Or, in IMS service-user registration processes, if believing from for storing user subscription The equipment of breath obtains IMS service-users and has contracted the first configured information of value-added service, then in the tables of data of current registered user The second configured information of middle setting, second configured information is used to show that corresponding IMS service-users have been contracted value-added service.Phase Answer, value-added service trigger module 1102 be confirmed whether to allow for the calling subscribe provides value-added service when specifically for, Whether the configured information for the value-added service that shows to have contracted is provided with tables of data according to the calling subscribe, is confirmed whether Allow to provide value-added service for the calling subscribe.

It is MRF entity devices provided in an embodiment of the present invention referring to Figure 12, the MRF entity devices may include：

Media negotiation module 1201, for after calling subscriber calls called subscriber, according to the triggering of equipment of the core network, with The calling subscribe carries out SDP media negotiations, and negotiation obtains the first media coding format, SDP matchmaker is carried out with the called subscriber Body is consulted, and negotiation obtains the second media coding format；

Media coding format modular converter 1202, for the IMS business meetings in the calling subscribe and the called subscriber During words, the media stream transition by first media coding format of the calling subscribe is the media of the second media coding format It is sent to the called subscriber after stream, and/or is the by the media stream transition of second media coding format of the called subscriber The calling subscribe is sent to after the Media Stream of one media coding format.

Further, may also include：Conference management module 1203, for being used with the caller in media negotiation module 1201 Family consults to create multimedia conferencing after obtaining the first media coding format, and the calling subscribe is added into the multimedia meeting View；And, after media negotiation module 1201 consults to obtain the second media coding format with the called subscriber, will be described called User adds the multimedia conferencing.

The present invention is with reference to method according to embodiments of the present invention, equipment（System）And the flow of computer program product Figure and/or block diagram are described.It should be understood that every first-class during flow chart and/or block diagram can be realized by computer program instructions The combination of flow and/or square frame in journey and/or square frame and flow chart and/or block diagram.These computer programs can be provided The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced for reality by the instruction of computer or the computing device of other programmable data processing devices The device of the function of being specified in present one flow of flow chart or multiple one square frame of flow and/or block diagram or multiple square frames.

These computer program instructions may be alternatively stored in can guide computer or other programmable data processing devices with spy In determining the computer-readable memory that mode works so that instruction of the storage in the computer-readable memory is produced and include finger Make the manufacture of device, the command device realize in one flow of flow chart or multiple one square frame of flow and/or block diagram or The function of being specified in multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented treatment, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.

, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent Select embodiment and fall into having altered and changing for the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising these changes and modification.

Claims

1. a kind of IP multimedia subsystem IMS service call methods, it is characterised in that methods described includes：

Equipment of the core network receives the IMS service call request message that calling subscribe sends, however, it is determined that an IMS business Session Description Protocol SDP information comprising the calling subscribe in call request message, then please by an IMS service calls Message is asked to be sent to called subscriber；

If the equipment of the core network receives the IMS service call response messages that the called subscriber returns, and according to institute State an IMS service calls response message and confirm that called subscriber does not support the media coding format of the calling subscribe, then pass through Application server triggers the SDP media consultation process and triggering between media resource function MRF entities and the calling subscribe SDP media consultation process between the MRF entities and the called subscriber, makes the calling subscribe and called subscriber profit IMS service conversations are carried out with the media coding format translation function of the MRF entities；

Wherein, SDP media of the triggering between MRF and the calling subscribe and between the MRF and the called subscriber Negotiations process, specifically includes：The equipment of the core network by application server trigger the MRF entities and the calling subscribe it Between SDP media consultation process, after the SDP media negotiations success of the MRF entities and the calling subscribe, the application clothes Business device indicates the MRF entity set-ups multimedia conferencing and the calling subscribe is added into the multimedia conferencing；It is many creating Media conference and after the calling subscribe added into the multimedia conferencing, the application server triggers the MRF entities With the SDP media consultation process between the called subscriber, in the SDP media negotiations of the MRF entities and the called subscriber After success, the application server indicates the MRF entities that the called subscriber is added into the multimedia conferencing；

After SDP media negotiation failures between the MRF entities and the called subscriber, also include：The application server to The called subscriber sends the 6th IMS service call response messages, and respectively to the calling subscribe and MRF entities transmission IMS service call ends, the 6th IMS service calls response message is used to show that the MRF entities are called with described The SDP media negotiation failures of user.

2. the method for claim 1, it is characterised in that the equipment of the core network triggers described by application server SDP media consultation process between MRF entities and the calling subscribe, in the SDP matchmaker of the MRF entities and the calling subscribe After body is consulted successfully, the application server indicates the MRF entity set-ups multimedia conferencing and adds the calling subscribe The multimedia conferencing, including：

The equipment of the core network sends the 2nd IMS service call request message, the 2nd IMS business to the application server SDP information and the multimedia conferencing list of the calling subscribe are carried in call request message, the list of conference includes institute State the information of calling subscribe and the information of the called subscriber；

The 2nd IMS service call request message is sent to the MRF entities by the application server, so that the MRF Entity carries out SDP media negotiations according to the SDP information of the calling subscribe and the SDP information of the MRF entities, and is consulting into After work(the 2nd IMS service call response messages are sent to the calling subscribe；

The application server receives the confirmation that the calling subscribe returns according to the 2nd IMS service calls response message After message, the MRF is indicated to create multimedia conferencing, and the calling subscribe is added into the multimedia conferencing.

3. the method for claim 1, it is characterised in that creating multimedia conferencing and the calling subscribe added into institute State after multimedia conferencing, the application server triggers the SDP media negotiations between the MRF entities and the called subscriber Process, after SDP media negotiation success of the MRF entities with the called subscriber, the application server indicates the MRF The called subscriber is added the multimedia conferencing by entity, including：

The application server receive that the MRF entities send for showing to successfully create Multimedia session and by the master After making user add the response message of the multimedia conferencing, send the 3rd IMS service call requests to the called subscriber and disappear Breath, and the 3rd IMS service call response messages that the called subscriber returns are received, the 3rd IMS service calls response disappears The SDP information of the called subscriber is carried in breath；

The application server sends the 4th IMS service call request message to the MRF entities, and the 4th IMS business please The SDP information that the called subscriber is carried in message is sought, so that SDP information institute of the MRF entities according to the called subscriber The SDP information for stating MRF entities carries out SDP media negotiations；

The application server receives the 4th IMS service call response messages that the MRF is returned, if according to the 4th IMS Service call response message confirms the SDP media negotiations success of the MRF entities and the called subscriber, it indicates that the MRF The called subscriber is added the multimedia conferencing by entity.

4. the method for claim 1, it is characterised in that the SDP media between the MRF entities and the calling subscribe After consulting failure, also include：

The 5th IMS service call response messages that the MRF entities send are sent to the caller and used by the equipment of the core network Family, the 5th IMS service calls response message is used to show the MRF with the SDP media negotiation failures of the calling subscribe.

5. the method as any one of claim 1-4, it is characterised in that the equipment of the core network is to the application service Device sends the 2nd IMS service call request message, including：

The equipment of the core network is confirmed whether to allow to provide value-added service for the calling subscribe, if confirmation allows to be the caller User provides value-added service, then send the 2nd IMS service call request message to the application server.

6. the method for claim 1, it is characterised in that methods described also includes：

If the equipment of the core network is determined in the IMS service call request message not comprising the SDP of the calling subscribe Information, then be sent to MRF entities by an IMS service call requests message through application server, to trigger the MRF realities SDP media consultation process between body and the calling subscribe and between the MRF entities and the called subscriber, makes described Calling subscribe and the called subscriber carry out IMS service conversations using the media coding format translation function of the MRF entities.

7. method as claimed in claim 6, it is characterised in that by by the IMS service call requests message through should It is sent to what MRF entities were triggered with server, the SDP media consultation process between the MRF entities and the calling subscribe, Including：

The first IMS service call request message is sent to the application server, the application by the equipment of the core network The first IMS business request informations are sent to the MRF entities by server, and the IMS that the MRF entities are returned Service response message is sent to the equipment of the core network, and the MRF entities are carried in the IMS service call response messages SDP information；

The first IMS service response messages are sent to the calling subscribe by the equipment of the core network, and the caller is used The confirmation message that family returns is sent to the application server, and be sent to for the confirmation message described by the application server MRF entities, carry the SDP information of the calling subscribe in the confirmation message, so that the MRF entities are used according to the caller The SDP information of the SDP information at family and the MRF entities carries out SDP media negotiations；

The application server indicates the MRF entity set-ups multimedia conferencing, and the calling subscribe is added into many matchmakers Know from experience view.

8. method as claimed in claim 6, it is characterised in that by by the IMS service call requests message through should It is sent to what MRF entities were triggered with server, the SDP media consultation process between the MRF entities and the called subscriber, Including：

The application server receives the response message that the calling subscribe returns, and the response returned according to the calling subscribe After MRF described in message authentication is successful with the SDP media negotiations of the calling subscribe, sends the 7th IMS to the called subscriber and exhale Business request information is, the 7th IMS service call response messages that the called subscriber returns, the 7th IMS business is received The SDP information of the called subscriber is carried in call message；

The application server sends the 8th IMS service call request message to the MRF entities, and the 8th IMS business is exhaled The SDP information that the called subscriber is carried in request message is, so that the MRF entities are believed according to the SDP of the called subscriber The SDP information of breath and the MRF entities carries out SDP media negotiations；

After the application server receives the successful response message of negotiation that the MRF entities are returned, the MRF entities are indicated The called subscriber is added into the multimedia conferencing.

9. method as claimed in claim 6, it is characterised in that the equipment of the core network please by an IMS service calls Message is asked to be sent to MRF entities through application server, including：

The equipment of the core network is confirmed whether to allow to provide value-added service for the calling subscribe, and is confirming to allow to be the master After making user provide value-added service, an IMS service call requests message is sent to MRF entities through application server.

10. method as claimed in claim 9, it is characterised in that methods described also includes：

In user data table on the equipment of the core network, the IMS service-users for value-added service of having contracted set instruction Information, the configured information is used to show that corresponding IMS service-users have been contracted value-added service；Or

The equipment of the core network is in IMS service-user registration processes, if being obtained from the equipment for storing user subscription information The information of value-added service server, then set configured information in the tables of data of current registered user, and the configured information is used for Show that corresponding IMS service-users have been contracted value-added service；Or

The equipment of the core network is in IMS service-user registration processes, if being obtained from the equipment for storing user subscription information IMS service-users have been contracted the first configured information of value-added service, then second is set in the tables of data of current registered user and referred to Show information, second configured information is used to showing that corresponding IMS service-users to have been contracted value-added service；

Whether the equipment of the core network is provided with for showing value-added service of having contracted according in the tables of data of the calling subscribe Configured information, be confirmed whether to allow to provide value-added service for the calling subscribe.

A kind of 11. IP multimedia subsystem IMS service call methods, it is characterised in that methods described includes：

If the equipment of the core network extracts the caller from an IMS service call request message of the calling subscribe and uses The SDP information at family, then be sent to MRF entities, to trigger by an IMS service call requests message through application server The SDP media consultation process between MRF entities and the calling subscribe and between the MRF entities and called subscriber is stated, is made The calling subscribe and the called subscriber carry out IMS business meetings using the media coding format translation function of the MRF entities Words；

Wherein, it is sent to what MRF entities were triggered through application server by by an IMS service call requests message, SDP media consultation process between the MRF entities and the calling subscribe, specifically includes：The equipment of the core network will be described First IMS service call request message is sent to the application server, and the application server please by an IMS business Message is asked to be sent to the MRF entities, so that SDP information and the MRF entity of the MRF entities according to the calling subscribe SDP information carry out SDP media negotiations, and send an IMS service calls to the calling subscribe after consulting successfully and respond Message；The application server receives the confirmation that the calling subscribe returns according to the IMS service calls response message After message, the MRF entity set-ups multimedia conferencing is indicated, and the calling subscribe is added into the multimedia conferencing；Or

It is sent to what MRF entities were triggered through application server by by an IMS service call requests message, it is described SDP media consultation process between MRF entities and the called subscriber, specifically includes：The application server receives described The response message that calling subscribe returns, and the response message returned according to the calling subscribe confirms the MRF and the caller After the SDP media negotiations success of user, the 2nd IMS call business request messages are sent to the called subscriber, receive the quilt The 2nd IMS service call response messages for making user return, carry described called in the 2nd IMS service call response messages The SDP information of user；The application server sends the 3rd IMS service call request message, the described 3rd to the MRF entities The SDP information of the called subscriber is carried in IMS service call request message, so that the MRF entities are according to the called use The SDP information of the SDP information at family and the MRF entities carries out SDP media negotiations；The application server receives the MRF After the successful response message of negotiation that entity is returned, indicate the MRF entities that the called subscriber is added into the multimedia meeting View.

12. methods as claimed in claim 11, it is characterised in that the equipment of the core network is by an IMS service calls Request message is sent to MRF entities through application server, including：

13. methods as claimed in claim 12, it is characterised in that methods described also includes：

A kind of 14. equipments of the core network, it is characterised in that including：

Call Control Block, the IMS service call request message for receiving calling subscribe's transmission, however, it is determined that described first Session Description Protocol SDP information comprising the calling subscribe in IMS service call request message, then by an IMS industry Business call request message is sent to called subscriber；

Value-added service trigger module, for receiving the IMS industry that the called subscriber returns in the Call Control Block Business call message, and confirm that called subscriber does not support that the caller is used according to the IMS service calls response message During the media coding format at family, triggered between media resource function MRF entities and the calling subscribe by application server SDP media consultation process between SDP media consultation process and the triggering MRF entities and the called subscriber, makes described Calling subscribe and the called subscriber carry out IMS service conversations using the media coding format translation function of the MRF entities；

Wherein, between the value-added service trigger module is triggered MRF and the calling subscribe and the MRF and the quilt The SDP media consultation process between user is, is specifically included：

SDP media consultation process between the MRF entities and the calling subscribe is triggered by application server, described After MRF entities are successful with the SDP media negotiations of the calling subscribe, the application server indicates the MRF entity set-ups many The calling subscribe is simultaneously added the multimedia conferencing by media conference；Add in establishment multimedia conferencing and by the calling subscribe Enter after the multimedia conferencing, the application server triggers the SDP media between the MRF entities and the called subscriber Negotiations process, after SDP media negotiation success of the MRF entities with the called subscriber, the application server indicates institute State MRF entities and the called subscriber is added into the multimedia conferencing；Between the MRF entities and the called subscriber After SDP media negotiation failures, the application server sends the 6th IMS service call response messages to the called subscriber, and IMS service call ends are sent to the calling subscribe and the MRF entities respectively, the 6th IMS service calls ring Message is answered for showing the MRF entities with the SDP media negotiation failures of the called subscriber.

15. equipment as claimed in claim 14, it is characterised in that the value-added service trigger module specifically for, by The application server is sent described in the 2nd IMS service call request message triggers between MRF and the calling subscribe and institute The SDP media consultation process between MRF and the called subscriber is stated, institute is carried in the 2nd IMS service call request message SDP information and the multimedia conferencing list of calling subscribe are stated, the list of conference includes the information of the calling subscribe and institute State the information of called subscriber.

16. equipment as claimed in claim 15, it is characterised in that the value-added service trigger module is specifically for confirmation is It is no to allow to provide value-added service for the calling subscribe, if confirmation allows to provide value-added service for the calling subscribe, to institute State application server and send the 2nd IMS service call request message.

17. equipment as claimed in claim 14, it is characterised in that the value-added service trigger module is additionally operable to, it is determined that institute When stating in an IMS service call request message SDP information not comprising the calling subscribe, an IMS business is exhaled Request message is made to be sent to MRF entities through application server, to trigger between the MRF entities and the calling subscribe and institute The SDP media consultation process between MRF entities and the called subscriber is stated, the calling subscribe and the called subscriber is utilized The media coding format translation function of the MRF entities carries out IMS service conversations.

18. equipment as claimed in claim 17, it is characterised in that the value-added service trigger module passes through described first IMS service call requests message is sent to what MRF entities were triggered through application server, and the MRF entities are used with the caller SDP media consultation process between family, including：

The first IMS service call request message is sent to the application server, the application server is by described One IMS business request informations are sent to the MRF entities, and the IMS service response messages hair that the MRF entities are returned The equipment of the core network is given, the SDP information of the MRF entities is carried in the IMS service call response messages；

The first IMS service response messages are sent to the calling subscribe, and the confirmation that the calling subscribe returns is disappeared Breath is sent to the application server, and the confirmation message is sent to the MRF entities, the confirmation by the application server The SDP information of the calling subscribe is carried in message, so that SDP information and institute of the MRF entities according to the calling subscribe The SDP information for stating MRF entities carries out SDP media negotiations；

19. equipment as claimed in claim 17, it is characterised in that the value-added service trigger module passes through described first IMS service call requests message is sent to what MRF entities were triggered through application server, the MRF entities and the called use SDP media consultation process between family, including：

The response message that the calling subscribe returns is received, and according to the response message confirmation that the calling subscribe returns After MRF is successful with the SDP media negotiations of the calling subscribe, sends the request of the 7th IMS call business to the called subscriber and disappear Breath, receives the 7th IMS service call response messages that the called subscriber returns, the 7th IMS service call response messages The middle SDP information for carrying the called subscriber；

The 8th IMS service call request message is sent to the MRF entities, is taken in the 8th IMS service call request message SDP information with the called subscriber, so that SDP information and the MRF entity of the MRF entities according to the called subscriber SDP information carry out SDP media negotiations；

20. equipment as claimed in claim 17, it is characterised in that the value-added service trigger module is specifically for confirmation is It is no to allow to provide value-added service for the calling subscribe, and after confirming to allow to provide value-added service for the calling subscribe, will The first IMS service call requests message is sent to MRF entities through application server.

21. equipment as described in claim 16 or 20, it is characterised in that also include：

Configuration module, in user data table, the IMS service-users for value-added service of having contracted to set configured information, The configured information is used to show that corresponding IMS service-users have been contracted value-added service；Or

In IMS service-user registration processes, if obtaining value-added service server from the equipment for storing user subscription information Information, then configured information is set in the tables of data of current registered user, the configured information is used to show corresponding IMS industry Business user has contracted value-added service；Or

In IMS service-user registration processes, if obtaining the signing of IMS service-users from the equipment for storing user subscription information First configured information of value-added service, then set the second configured information, described second in the tables of data of current registered user Configured information is used to show that corresponding IMS service-users have been contracted value-added service；

The value-added service trigger module when being confirmed whether to allow to provide value-added service for the calling subscribe, specifically for： Whether the configured information for the value-added service that shows to have contracted is provided with tables of data according to the calling subscribe, is confirmed whether Allow to provide value-added service for the calling subscribe.

A kind of 22. equipments of the core network, it is characterised in that including：

Value-added service trigger module, for being asked from an IMS service calls of the calling subscribe in the Call Control Block Asking when extract the SDP information of the calling subscribe in message, by the IMS service call request message through application service Device is sent to MRF entities, to trigger between the MRF entities and the calling subscribe and the MRF entities and called subscriber Between SDP media consultation process, the calling subscribe and called subscriber is turned using the media coding format of the MRF entities Changing function carries out IMS service conversations；

Wherein, it is sent to what MRF entities were triggered through application server by by an IMS service call requests message, SDP media consultation process between the MRF entities and the calling subscribe, specifically includes：By an IMS service calls Request message is sent to the application server, and an IMS business request informations are sent to institute by the application server MRF entities are stated, so that the MRF entities are carried out according to the SDP information of the calling subscribe and the SDP information of the MRF entities SDP media negotiations, and send an IMS service call response messages to the calling subscribe after consulting successfully；The application After server receives the confirmation message that the calling subscribe returns according to the IMS service calls response message, instruction institute MRF entity set-up multimedia conferencings are stated, and the calling subscribe is added into the multimedia conferencing；Or

23. equipment as claimed in claim 22, it is characterised in that the value-added service trigger module is specifically for confirmation is It is no to allow to provide value-added service for the calling subscribe, and after confirming to allow to provide value-added service for the calling subscribe, will The first IMS service call requests message is sent to MRF entities through application server.

24. equipment as claimed in claim 23, it is characterised in that also include：

The value-added service trigger module be confirmed whether to allow for the calling subscribe provides value-added service when specifically for root Whether according to the configured information being provided with the tables of data of the calling subscribe for the value-added service that shows to have contracted, it is confirmed whether to permit Perhaps for the calling subscribe provides value-added service.