CN105100046A

CN105100046A - Media exchange method and device thereof

Info

Publication number: CN105100046A
Application number: CN201510256629.7A
Authority: CN
Inventors: 张立斌
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-05-19
Filing date: 2015-05-19
Publication date: 2015-11-25
Also published as: WO2016184281A1

Abstract

The invention discloses a media exchange method and a device thereof. In the media exchange method disclosed by the invention, a control plane determines that first user equipment adopts a first media format and second user equipment communicating with the first user equipment adopts a second media format, the second media format is an EVS master mode, and user plane equipment is notified to convert a media message sent by the first user equipment with the media format being the first media format into a media message with the media format being an EVS compatible mode and convert a media message sent by the second user equipment with the media format being the EVS compatible mode into a media message in the first media format, so as to exchange the media format of a first user with the media data of a second user based on the EVS compatible mode.

Description

A kind of media interoperability methods and device thereof

Technical field

The present invention relates to the communications field, particularly relate to a kind of media interoperability methods and device thereof.

Background technology

In the communications field, such as real time phone call business, before call is set up, caller and called between need mutual media capability each other, this process is called media negotiation.By media negotiation, calling and called can know the media capability of opposite end, thus the media data encoding form adopted when determining to communicate with opposite end.

3GPP standard latest definition EVS (EnhancedVoiceServices, the voice service of enhancing) coding and decoding scheme, refers to 3GPP26.445.This coding and decoding scheme has the advantages that encoding and decoding quality is good, code rate is high, and can the speed of compatible AMR-WB (AdaptiveMulti-Rate-Wideband, wideband adaptive multi tate) encoding and decoding.EVS coding and decoding scheme has two patterns: holotype (primary) and compatibility mode, compatibility mode also claims AMR-WBIO pattern.When using EVS coding and decoding scheme, the one in holotype or compatibility mode can only be used.

Singly treat voice (SingleRadioVoiceCallContinuity continuously, SRVCC) business refers to user in communication process from E-UTRAN (EvolvedUniversalTerrestrialRadioAccessNetwork, the Universal Terrestrial wireless access network of evolution) roam into UTRAN (UMTSTerrestrialRadioAccessNetwork, radio access network of universal mobile communication system)/GERAN (GSMEDGERadioAccessNetwork, GSM EDGE radio access network) time, through the handoff procedure of terminal and the network equipment, the call of user is kept not interrupt.

After network switches, user in UTRAN/GERAN uses AMR (AdaptiveMulti-Rate, adaptive multi-rate) or other encoding/decoding modes encoding and decoding are carried out to media data, the user still resided in E-UTRAN network uses EVS holotype to carry out encoding and decoding to media data.The encoding/decoding mode used in UTRAN/GERAN and the EVS holotype used in E-UTRAN network incompatible, cannot intercommunication be realized.

As can be seen here, a kind of media Interworking Scheme between EVS holotype and other encoding/decoding modes is needed at present badly.

Summary of the invention

The embodiment of the present invention provides a kind of media interoperability methods and device thereof, in order to realize the media intercommunication between EVS holotype and other encoding/decoding modes.

First aspect, provide a kind of media interoperability methods, described method comprises:

Chain of command equipment determination first user equipment adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, and described second media formats is EVS holotype;

Described chain of command equipment is to user face equipment dispatch order message, and described notification message is for notifying described user face equipment and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends being converted to the media message that media formats is the first media formats.

In conjunction with first aspect, in the first possible implementation of first aspect, described notification message comprises the information of described first media formats and the information of described second media formats.

In conjunction with first aspect, in the implementation that the second of first aspect is possible, described method also comprises: according to described first media formats and described second media formats, described chain of command equipment determines that described user face equipment adopts EVS compatibility mode to communicate with described second subscriber equipment, adopt described first media formats to communicate with described first user equipment; Wherein, described notification message comprises the result that described chain of command equipment is determined.

In conjunction with the implementation that the first or the second of first aspect or first aspect are possible, in the third possible implementation of first aspect, described method also comprises:

The media data of the EVS compatibility mode be converted to described in the realtime transmission protocol RTP message format of described user face equipment use EVS or the RTP message format of EVS compatibility mode encapsulate;

The media data of the first media formats be converted to described in the RTP message format encapsulation of described user face equipment use first media formats.

In conjunction with the implementation that the first or the second of first aspect or first aspect are possible, in the 4th kind of possible implementation of first aspect, described first media formats is AMR-WB;

The described media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, comprising:

The described RTP message format of user face equipment use EVS or the RTP message format of AMR-WB encapsulate the media data in the media message of described first user equipment transmission;

The described media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, comprising:

Media data in the media message of the described second subscriber equipment transmission of RTP message format encapsulation of described user face equipment use AMR-WB.

Second aspect, provide a kind of media interoperability methods, described method comprises:

User face equipment receives the notification message that chain of command equipment sends, and described notification message is for notifying described user face equipment the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats of described second subscriber equipment transmission being converted to the media message that media formats is the first media formats;

It is the media message of the first media formats that described user face equipment receives the media formats that described first user equipment sends, the media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, sends to described second subscriber equipment the media message that the media formats after changing is EVS compatibility mode;

The media formats that equipment reception described second subscriber equipment in described user face sends is the media message of EVS compatibility mode, the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, sends to described first user equipment the media message that the media formats after changing is the first media formats.

In conjunction with second aspect, in the first possible implementation of second aspect, described change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

In conjunction with the first possible implementation of second aspect or second aspect, in the implementation that the second of second aspect is possible, described notification message comprises the information of described first media formats and the information of described second media formats;

Described method also comprises: the information of described first media formats that described user face equipment comprises according to described notification message and the information of described second media formats, determine to adopt EVS compatibility mode to communicate with described second subscriber equipment, adopt the first media formats to communicate with described first user equipment.

In conjunction with the implementation that the first or the second of second aspect or second aspect are possible, in the third possible implementation of second aspect, described method also comprises:

In conjunction with second aspect, in the 4th kind of possible implementation of second aspect, described first media formats is AMR-WB;

The media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode by described user face equipment, comprising:

The media message that the media formats that described second subscriber equipment sends is EVS compatibility mode by described user face equipment is converted to the media message that media formats is the first media formats, comprising:

The third aspect, provide a kind of media interoperability methods, described method comprises:

Chain of command entity determination first user equipment in media changer devices adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, and described second media formats is for strengthening voice service EVS holotype;

Described chain of command entity sends a notification message to the user entity in described media changer devices, and described notification message is for notifying described user entity and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends being converted to the media message that media formats is the first media formats;

It is the media message of the first media formats that described user entity receives the media formats that described first user equipment sends, the media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, sends to described second subscriber equipment the media message that the media formats after changing is EVS compatibility mode;

The media formats that described second subscriber equipment of described user entity reception sends is the media message of EVS compatibility mode, the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, sends to described first user equipment the media message that the media formats after changing is the first media formats.

In conjunction with the third aspect, in the first possible implementation of the third aspect, described change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

In conjunction with the first possible implementation of the third aspect or the third aspect, in the implementation that the second of the third aspect is possible, described notification message comprises the information of described first media formats and the information of described second media formats;

Described method also comprises: the information of described first media formats that described user entity comprises according to described notification message and the information of described second media formats, determine to adopt EVS compatibility mode to communicate with described second subscriber equipment, adopt the first media formats to communicate with described first user equipment.

In conjunction with the first possible implementation of the third aspect or the third aspect, in the third possible implementation of the third aspect, described method also comprises: according to described first media formats and described second media formats, described chain of command entity determines that described user entity adopts EVS compatibility mode to communicate with described second subscriber equipment, adopt described first media formats to communicate with described first user equipment; Wherein, described notification message comprises the result that described chain of command entity is determined.

In conjunction with the first of the third aspect or the third aspect to any one in the third possible implementation, in the 4th kind of possible implementation of the third aspect, described method also comprises:

Described user entity uses the media data of the EVS compatibility mode be converted to described in the encapsulation of the RTP message format of the realtime transmission protocol RTP message format of EVS or EVS compatibility mode;

Described user entity uses the media data of the first media formats be converted to described in the encapsulation of the RTP message format of the first media formats.

In conjunction with the third aspect, in the 5th kind of possible implementation of the third aspect, described first media formats is AMR-WB;

The described user entity use RTP message format of EVS or the RTP message format of AMR-WB encapsulate the media data in the media message of described first user equipment transmission;

Media data in the media message that described user entity uses described second subscriber equipment of the RTP message format of AMR-WB encapsulation to send.

Fourth aspect, provides a kind of chain of command equipment, and described chain of command equipment comprises:

Determination module, for determining that first user equipment adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, and described second media formats is for strengthening voice service EVS holotype;

Notification module, for to user face equipment dispatch order message, described notification message is for notifying described user face equipment the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends being converted to the media message that media formats is the first media formats.

In conjunction with fourth aspect, in the first possible implementation of fourth aspect, described notification message comprises the information of described first media formats and the information of described second media formats.

In conjunction with fourth aspect, in the implementation that the second of fourth aspect is possible, described chain of command equipment also comprises: decision-making module, for determining that according to described first media formats and described second media formats described user face equipment adopts EVS compatibility mode to communicate with described second subscriber equipment, described first media formats is adopted to communicate with described first user equipment; Wherein, described notification message comprises the result that described chain of command equipment is determined.

In conjunction with the implementation that the first or the second of fourth aspect are possible, in the third possible implementation of fourth aspect, described first media formats is AMR-WB;

Described notification message is for notifying that the described RTP message format of user face equipment use EVS or the RTP message format of AMR-WB encapsulate the media data in the media message of described first user equipment transmission, and the media data in the media message using described second subscriber equipment of the RTP message format of AMR-WB encapsulation to send.

5th aspect, provides a kind of user face equipment, and described user face equipment comprises:

Receiver module, for receiving the notification message that chain of command equipment sends, described notification message is for notifying described user face equipment and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats of described second subscriber equipment transmission being converted to the media message that media formats is the first media formats;

First modular converter, the media formats sent for receiving described first user equipment is the media message of the first media formats, the media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, sends to described second subscriber equipment the media message that the media formats after changing is EVS compatibility mode;

Second modular converter, the media formats sent for receiving described second subscriber equipment is the media message of EVS compatibility mode, the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, sends to described first user equipment the media message that the media formats after changing is the first media formats.

In conjunction with the 5th aspect, in the first possible implementation in the 5th, described first modular converter change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

In conjunction with the first possible implementation of the 5th aspect or the 5th aspect, in the implementation that the second in the 5th is possible, described notification message comprises the information of described first media formats and the information of described second media formats;

Described user face equipment also comprises:

Decision-making module, for the information of described first media formats that comprises according to described notification message and the information of described second media formats, determine to adopt EVS compatibility mode to communicate with described second subscriber equipment, adopt the first media formats to communicate with described first user equipment.

In conjunction with the implementation that the first or the second of the 5th aspect or the 5th aspect are possible, in the third possible implementation in the 5th, described first modular converter, also for using the media data of the EVS compatibility mode be converted to described in the encapsulation of the RTP message format of the realtime transmission protocol RTP message format of EVS or EVS compatibility mode; Described second modular converter, also for using the media data of the first media formats be converted to described in the encapsulation of the RTP message format of the first media formats.

In conjunction with the 5th aspect, in the 4th kind of possible implementation in the 5th, described first media formats is AMR-WB;

Described first modular converter, encapsulates the media data in the media message of described first user equipment transmission specifically for the use RTP message format of EVS or the RTP message format of AMR-WB;

Described second modular converter, the media data in the media message sent specifically for using described second subscriber equipment of the RTP message format of AMR-WB encapsulation.

6th aspect, provides a kind of media changer devices, and described media changer devices comprises:

Chain of command entity, for determining that first user equipment adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, and described second media formats is for strengthening voice service EVS holotype; And, to user face equipment dispatch order message, described notification message is for notifying described user face equipment and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends being converted to the media message that media formats is the first media formats;

User entity, the media formats sent for receiving described first user equipment is the media message of the first media formats, the media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, sends to described second subscriber equipment the media message that the media formats after changing is EVS compatibility mode; And, the media formats receiving described second subscriber equipment transmission is the media message of EVS compatibility mode, the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, sends to described first user equipment the media message that the media formats after changing is the first media formats.

In conjunction with the 6th aspect, in the first possible implementation in the 6th, described user entity change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

In conjunction with the first possible implementation of the 6th aspect or the 6th aspect, in the implementation that the second in the 6th is possible, described notification message comprises the information of described first media formats and the information of described second media formats;

Described user entity, also for the information of described first media formats that comprises according to described notification message and the information of described second media formats, determine that described employing EVS compatibility mode communicates with described second subscriber equipment, adopt described first media formats to communicate with described first user equipment.

In conjunction with the first possible implementation of the 6th aspect or the 6th aspect, in the third possible implementation in the 6th, described chain of command entity, also for determining that according to described first media formats and described second media formats described user face equipment adopts EVS compatibility mode to communicate with described second subscriber equipment, described first media formats is adopted to communicate with described first user equipment; Wherein, described notification message comprises the result that described chain of command equipment is determined.

In conjunction with the one in the first possible implementation of the 6th aspect or the 6th aspect, in the 4th kind of possible implementation in the 6th, described user entity, also for using the media data of the EVS compatibility mode be converted to described in the encapsulation of the RTP message format of the realtime transmission protocol RTP message format of EVS or EVS compatibility mode; And, use the media data of the first media formats be converted to described in the encapsulation of the RTP message format of the first media formats.

In conjunction with the 6th aspect, in the 5th kind of possible implementation in the 6th, described first media formats is AMR-WB; Described user entity, encapsulates the media data in the media message of described first user equipment transmission specifically for the use RTP message format of EVS or the RTP message format of AMR-WB; And, the media data in the media message using described second subscriber equipment of the RTP message format of AMR-WB encapsulation to send.

7th aspect, provides a kind of chain of command equipment, and described chain of command equipment comprises: interface, processing unit and memory; Described processing unit is for controlling the operation of described chain of command equipment; Described memory is used for providing instruction and data to described processing unit; Each assembly of described chain of command equipment is coupled by bus system;

Described processing unit, specifically for reading the program of memory, performs following process:

Determine that first user equipment adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, and described second media formats is EVS holotype;

To user face equipment dispatch order message, described notification message is for notifying described user face equipment and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends being converted to the media message that media formats is the first media formats.

Wherein, the said process performed by described processing unit, similar with the specific implementation process of above-mentioned first aspect, do not repeat them here.

Eighth aspect, provides a kind of user face equipment, and described user face equipment comprises: interface, processing unit and memory; Described processing unit is for controlling the operation of described user face equipment; Described memory is used for providing instruction and data to described processing unit; Each assembly of described user face equipment is coupled by bus system;

Receive the notification message that chain of command equipment sends, described notification message is for notifying described user face equipment the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats of described second subscriber equipment transmission being converted to the media message that media formats is the first media formats;

The media formats receiving the transmission of described first user equipment is the media message of the first media formats, the media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, sends to described second subscriber equipment the media message that the media formats after changing is EVS compatibility mode;

The media formats receiving described second subscriber equipment transmission is the media message of EVS compatibility mode, the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, sends to described first user equipment the media message that the media formats after changing is the first media formats.

Wherein, the said process performed by described processing unit, similar with the specific implementation process of above-mentioned second aspect, do not repeat them here.

9th aspect, provides a kind of media changer devices, and described media changer devices comprises: interface, processing unit and memory; Described processing unit is for controlling the operation of described user face equipment; Described memory is used for providing instruction and data to described processing unit; Each assembly of described user face equipment is coupled by bus system;

Chain of command entity determination first user equipment adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, and described second media formats is for strengthening voice service EVS holotype;

Send a notification message to user entity, described notification message is for notifying described user entity and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends being converted to the media message that media formats is the first media formats;

It is the media message of the first media formats that user entity receives the media formats that described first user equipment sends, the media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, sends to described second subscriber equipment the media message that the media formats after changing is EVS compatibility mode;

The media formats that described second subscriber equipment of user entity reception sends is the media message of EVS compatibility mode, the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, sends to described first user equipment the media message that the media formats after changing is the first media formats.

Wherein, the said process performed by described processing unit, similar with the specific implementation process of the above-mentioned third aspect, do not repeat them here.

In the embodiment of the present invention, at chain of command, determine that first user equipment adopts the first media formats, the second media formats is adopted with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, described second media formats is EVS holotype, and notify that the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode by user face equipment and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, media message mutual between first user equipment and the second subscriber equipment is changed according to this notification message to make user face, thus realize media intercommunication.

Accompanying drawing explanation

Fig. 1 is the network architecture and SRVCC handoff scenario schematic diagram that in prior art, SRVCC business is relevant;

Fig. 2 is the network architecture and eSRVCC handoff scenario schematic diagram that in prior art, eSRVCC business is relevant;

The structural representation of the chain of command equipment 300 that Fig. 3 provides for the embodiment of the present invention;

The structural representation of the user face equipment 400 that Fig. 4 provides for the embodiment of the present invention;

The structural representation of the media changer devices 500 that Fig. 5 provides for the embodiment of the present invention;

The chain of command handling process schematic diagram that Fig. 6 provides for the embodiment of the present invention;

The user face handling process schematic diagram that Fig. 7 provides for the embodiment of the present invention;

Fig. 8 is the media negotiation signaling process schematic diagram in the embodiment of the present invention;

Fig. 9 is the schematic flow sheet based on AMR-WB encoding and decoding and EVS holotype encoding and decoding intercommunication under the eSRVCC scene in the embodiment of the present invention;

Figure 10 a and Figure 10 b is respectively media format conversion process schematic in the embodiment of the present invention;

Figure 11 a, Figure 11 b and Figure 11 c are respectively the schematic diagram of message format in the embodiment of the present invention;

Figure 12 is the media negotiation signaling process schematic diagram in another embodiment of the present invention;

Figure 13 is the schematic flow sheet of AMR-WB encoding and decoding and EVS holotype encoding and decoding intercommunication under the eSRVCC scene in another embodiment of the present invention;

Figure 14 a and Figure 14 b is respectively the structural representation of chain of command equipment 600 that another embodiment of the present invention provides and chain of command equipment 610;

Figure 15 a and Figure 15 b is respectively the structural representation of user face equipment 700 that another embodiment of the present invention provides and user face equipment 710;

The structural representation of the media changer devices 800 that Figure 16 provides for another embodiment of the present invention.

Embodiment

Embodiments provide a kind of media interoperability methods and device thereof.In the embodiment of the present invention, when changing the media data of EVS encoding/decoding mode and the media data of other media encoding/decoding modes, EVS holotype, first user equipment is adopted to adopt other patterns incompatible with EVS holotype if the media negotiation result of chain of command is the second subscriber equipment, then in user face, by media message request second subscriber equipment, EVS holotype is switched to EVS compatibility mode, the media message that the EVS codec of the second subscriber equipment is sent can be correctly decoded by the AMR-WB decoder in user face.By above realization, when meeting basic intercommunication, the system resource required for media encoding and decoding conversion process can be saved.

The embodiment of the present invention can be applicable to the fields such as VoLTE (VoiceoverLTE refers to the speech business carried by IP tunnel provided by LTE wireless network and EPC core net), or any use EVS coding and decoding scheme carries out the field of media intercommunication.

In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

What introduce below is some in multiple embodiment of the present invention, aims to provide basic understanding of the present invention, is not intended to confirm key of the present invention or decisive key element or limit claimed scope.According to technical scheme of the present invention, do not changing under connotation of the present invention, mutually can replace and obtain other implementation.

Below in the VoLTE field application embodiment of the present invention, the embodiment of the present invention is described in detail.

Fig. 1 schematically illustrates VoLTE system architecture, and SRVCC handoff scenario under this architecture.

As shown in Figure 1, the basic framework of VoLTE is made up of LTE wireless network, EPC (EvolvedPacketCore, evolution block core net) and IMS (IPMultimediaSubsystem, IP Multimedia System).

EPC is linked into IMS as Access Network, and IMS provides the integrated service such as voice and multimedia for subscriber equipment, and CS (CircuitSwitch, circuit switching) territory is the access network of IMS.SCCAS (servicecentralizationandcontinuityapplicationserver in IMS, service set and application server for continuity) as UE (UserEquipment, subscriber equipment, i.e. terminal) SIPUA (SessionInitiationProtocolUserAgent, session initiation protocol user agent) UE in CS territory is accessed IMS domain, complete IMS session establishment and control.P-CSCF (Proxy-CallSessionControlFunction, Proxy Call Session Control Function) is the first node that UE is accessed in ims.

MME (MobilityManagementEntity, Chinese is: Mobility Management Entity) in EPC is mainly used in mobile management, session management and user's access authentication etc.; S-GW (English is: Serving-GateWay, and Chinese is: gateway) is mainly used in the interface of termination wireless access part, as the anchor point etc. switched between base station; (English is P-GW: PacketDataNetworkGateway, Chinese is: packet data gateway) as the gateway connecting outer net, (English is: PacketDataNetwork towards PDN to be mainly used in termination, Chinese is: packet data network) Sgi interface, based on the charging etc. of business.

SRVCCIWF (English is: InterWorkingFunction, and Chinese is: intercommunication network function) in CS territory is mainly used in and other network interworkings; MSC (English is: MobileSwitchingCenter, and Chinese is: mobile switching centre) server is mainly used in url management.It is responsible for all call control signallings; (English is MGW: MediaGateway, Chinese is: media gateway) from the TDM in CS territory, (English is primary responsibility: TimeDivisionMultiplexandMultiplexer, Chinese is: time division multiplexing and multiplexer) carrying and from the IP carrying of IMS domain or the conversion that carries of ATM (English is: AsynchronousTransferMode, and Chinese is: asynchronous transfer mode).

UE1 and UE2 accesses by E-UTRAN when call is set up.UE1 and UE2 all adopts EVS holotype to carry out encoding and decoding to media data by media negotiation.After UE1 and UE2 call is set up, UE1 roams into UTRAN/GERAN from E-UTRAN, triggers SRVCC handoff procedure.The bearer path of UE1 and UE2 before SRVCC switches and after switching as shown in Figure 1.

After network switches, the media encoding/decoding mode that the media encoding/decoding mode that UE1 uses uses for AMR, UE2 is still EVS holotype, and both are incompatible, and namely both cannot realize intercommunication.

Fig. 2 schematically illustrates the eSRVCC handoff scenario under VoLTE system architecture.

ESRVCC (English is: enhancedSRVCC, and Chinese is: the SRVCC of enhancing) is the enhancing to SRVCC, its network architecture and SRVCC similar.ESRVCC optimizes the networking of SRVCC, (English is: accesstransfercontrolfunction to be wherein provided with ATCF, Chinese is: access conversion and control function) functional entity and ATGW (English is: accesstransfergateway, and Chinese is: access transfer gateway) functional entity.ATCF with ATGW is separated in logic function, and ATCF is the functional entity of chain of command, and ATGW is the functional entity in user face, and the two can be disposed respectively, also can unify deployment.If ATCF and ATGW unifies deployment, then the equipment being deployed with these two functional entitys can be expressed as ATCF/ATGW.General and the P-CSCF of ATCF/ATGW unifies and disposes, such as, ATCF/ATGW is arranged at P-CSCF entity and I-CSCF, and (English is: Interrogating-CSCF, Chinese is: inquiry CSCF) between/S-CSCF (English is: Serving-CSCF, and Chinese is: serving CSCF).

UE1 and UE2 accesses by E-UTRAN when call is set up.UE1 and UE2 all adopts EVS holotype to carry out encoding and decoding to media data by media negotiation.After UE1 and UE2 call is set up, UE1 roams into UTRAN/GERAN from E-UTRAN, triggers eSRVCC handoff procedure.The bearer path of UE1 and UE2 before eSRVCC switches and after switching as shown in Figure 2.

Can find out, for the calling that eSRVCC switching occurs, Media Stream network being switched subscriber equipment anchors to ATGW, follow-up like this occur again eSRVCC switch time, only need to upgrade the media information on ATGW, do not need the media information upgrading correspondent user device, make whole eSRVCC shorter for switching time.

Can be found out by above system architecture, when the media formats that the subscriber equipment that media are mutual adopts is different, need to carry out media conversion to realize media intercommunication.

In order to realize media intercommunication, in one embodiment of the present of invention, provide a kind of chain of command equipment 300, provide a kind of user face equipment 400 in another embodiment, and provide a kind of media changer devices 500 in another embodiment, all can be applicable to the above-mentioned network architecture.Chain of command equipment 300 obtains by carrying out transformation to the ATCF entity in above-mentioned framework.User face equipment 400 obtains by carrying out transformation to the ATGW in above-mentioned framework.Chain of command equipment 300 can coordinate medium conversion facilities with user face equipment 400, makes to carry out the mutual subscriber equipment of media when the media formats adopted each other is incompatible, carries out media intercommunication.Media changer devices 500 comprises chain of command entity and user entity, namely not only comprises chain of command function but also comprise user plane functions.

Distinguish composition graphs 3, Fig. 4 and Fig. 5 below, above-mentioned three kinds of equipment are described in detail.

See Fig. 3, be a kind of chain of command equipment 300 that the embodiment of the present invention provides.This equipment can comprise: interface 301, processing unit 302 and memory 303.Processing unit 302 is for controlling the operation of chain of command equipment 300; Memory 303 can comprise read-only memory and random access memory, for providing instruction and data to processing unit 302.A part for memory 303 can also comprise non-volatile row random access memory (NVRAM).Each assembly of chain of command equipment 300 is coupled by bus system, and wherein bus system 309 is except comprising data/address bus, also comprises power bus, control bus and status signal bus in addition.But for the purpose of clearly demonstrating, in the drawings various bus is all designated as bus system 309.

The chain of command handling process that the embodiment of the present invention discloses can be applied in processing unit 302, or is realized by processing unit 302.In implementation procedure, each step of chain of command handling process can be completed by the instruction of the integrated logic circuit of the hardware in processing unit 302 or software form.Processing unit 302 can be general processor, digital signal processor, application-specific integrated circuit (ASIC), field programmable gate array or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be the processor etc. of microprocessor or any routine.Step in conjunction with the method disclosed in the embodiment of the present invention can directly be presented as that hardware processor is complete, or hardware in purpose processor and software module combination complete.Software module can be positioned at random asccess memory, flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 303, and processing unit 302 reads the information in memory 303, completes the step of chain of command handling process in conjunction with its hardware.

See Fig. 4, be a kind of user face equipment 400 that the embodiment of the present invention provides.This equipment can comprise: interface 401, processing unit 402 and memory 403.Processing unit 402 is for controlling the operation of user face equipment 400; Memory 403 can comprise read-only memory and random access memory, for providing instruction and data to processing unit 402.A part for memory 403 can also comprise non-volatile row random access memory (NVRAM).Each assembly of user face equipment 400 is coupled by bus system, and wherein bus system 409 is except comprising data/address bus, also comprises power bus, control bus and status signal bus in addition.But for the purpose of clearly demonstrating, in the drawings various bus is all designated as bus system 409.

The user face handling process that the embodiment of the present invention discloses can be applied in processing unit 402, or is realized by processing unit 402.In implementation procedure, each step of user face handling process can be completed by the instruction of the integrated logic circuit of the hardware in processing unit 402 or software form.Processing unit 402 can be general processor, digital signal processor, application-specific integrated circuit (ASIC), field programmable gate array or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be the processor etc. of microprocessor or any routine.Step in conjunction with the method disclosed in the embodiment of the present invention can directly be presented as that hardware processor is complete, or hardware in purpose processor and software module combination complete.Software module can be positioned at random asccess memory, flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 403, and processing unit 402 reads the information in memory 403, in conjunction with the step of its hardware completing user face handling process.

See Fig. 5, it is a kind of media changer devices 500 that the embodiment of the present invention provides.This equipment can comprise: interface 501, processing unit 502 and memory 503.Processing unit 502 is for controlling the operation of media changer devices 500; Memory 503 can comprise read-only memory and random access memory, for providing instruction and data to processing unit 502.A part for memory 503 can also comprise non-volatile row random access memory (NVRAM).Each assembly of media changer devices 500 is coupled by bus system, and wherein bus system 509 is except comprising data/address bus, also comprises power bus, control bus and status signal bus in addition.But for the purpose of clearly demonstrating, in the drawings various bus is all designated as bus system 509.

The chain of command that the embodiment of the present invention discloses and user face handling process can be applied in processing unit 502, or are realized by processing unit 502.In implementation procedure, each step of chain of command and user face handling process can be completed by the instruction of the integrated logic circuit of the hardware in processing unit 502 or software form.Processing unit 502 can be general processor, digital signal processor, application-specific integrated circuit (ASIC), field programmable gate array or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be the processor etc. of microprocessor or any routine.Step in conjunction with the method disclosed in the embodiment of the present invention can directly be presented as that hardware processor is complete, or hardware in purpose processor and software module combination complete.Software module can be positioned at random asccess memory, flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 503, and processing unit 502 reads the information in memory 503, completes the step of chain of command handling process and user face handling process in conjunction with its hardware.

The chain of command handling process that the embodiment of the present invention provides and user face handling process can be distinguished as shown in Figure 6 and Figure 7.In all embodiments of the present invention, when not special declaration, the chain of command in flow process shown in Fig. 6 and Fig. 7 refers to chain of command equipment or chain of command entity, the chain of command entity in such as chain of command equipment 300 or media changer devices 500; User face refers to user face equipment or user entity, the user entity in such as user face equipment 400 or media changer devices 500.

See Fig. 6, it is the chain of command handling process schematic diagram that the embodiment of the present invention provides.Operation shown in Fig. 6 can be realized by chain of command equipment 300 (such as ATCF), also can be realized by the chain of command entity in media changer devices 500.

Chain of command handling process shown in Fig. 6 can comprise:

Step 601: chain of command determination first user equipment adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating.

Wherein, described first user equipment and described second subscriber equipment do not refer in particular to certain or certain subscriber equipment, only represent the correspondent user device that media data is mutual each other.

Described second media formats is EVS holotype, and described first media formats is not identical with described second media formats.Such as, described first media formats is AMR pattern, described second media formats is EVS holotype, or described first media formats is for G.729 pattern, described second media formats are EVS holotype.Certainly, the first media formats also can be the media formats of other types or agreement, and the embodiment of the present invention does not limit this.

Here, the first media formats that first user equipment adopts, refers to the media formats that first user equipment will use, or the current media formats used of first user equipment.In like manner, the second media formats that the second subscriber equipment adopts, refers to the media formats that the second subscriber equipment will use, or the current media formats used of the second subscriber equipment.Such as, in the media negotiation stage, chain of command, according to media negotiation stage first user equipment and the mutual control signal of the second subscriber equipment, can determine the media formats that first user equipment and the second subscriber equipment will adopt.Again such as, in circuit domain voice fallback scene, chain of command can determine the media formats that first user equipment and the second subscriber equipment are using.

Step 602: control user oriented face and send a notification message.Described notification message is for notifying described user face and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends being converted to the media message that media formats is the first media formats.Wherein, described EVS compatibility mode is AMR-WBIO pattern.

For step 602, in the preferred scheme of one, the information of the first media formats that first user equipment adopts is comprised in described notification message, the information of the second media formats that the second subscriber equipment adopts, namely by this notification message, the media formats that first user equipment and the second subscriber equipment adopt is informed to face, family equipment or user entity, according to this information, decision-making is carried out to media conversion to make user face equipment or user entity, namely determine to adopt EVS compatibility mode to communicate with described second subscriber equipment, the first media formats is adopted to communicate with described first user equipment.

For example, if described first media formats and described second media formats incompatible, such as, first media formats is AMR, second media formats is EVS holotype, after then the notification message of the information comprising above-mentioned two kinds of media formats is sent to user face by chain of command, following media conversion strategy can be determined according to this information in user face: by the media data of the first media formats in the media message of described first user equipment, be converted to the media data of EVS compatibility mode, and use the RTP (Real-timeTransportProtocol of EVS, RTP) message format or EVS compatibility mode the encapsulation of RTP message format described in the media data of EVS compatibility mode that is converted to, the media data of the EVS compatibility mode in the media message of described second subscriber equipment is converted to the media data of the first media formats, and uses the media data of the first media formats be converted to described in the encapsulation of the RTP message format of described first media formats.

Wherein, media formats is the encoding/decoding mode for media data, adopts different encoding/decoding modes to obtain the media data of different media formats.Message format is the encapsulation for message, and in embodiments of the present invention, message format refers to the encapsulation format of media data.

For step 602, in the preferred scheme of another kind, according to described first media formats and described second media formats, chain of command determines that user face adopts EVS compatibility mode to communicate with described second subscriber equipment, adopt described first media formats to communicate with described first user equipment, and the result determined is carried send to user face in an announcement message.

For example, if described first media formats and described second media formats incompatible, the media formats that then chain of command adopts separately according to first user equipment and the second subscriber equipment determines media conversion strategy, and by notification message, this media conversion strategy is informed to user face.Described media conversion strategy can be: by the media data of the first media formats in the media message of described first user equipment, be converted to the media data of EVS compatibility mode, and use the media data of the EVS compatibility mode be converted to described in the encapsulation of the RTP message format of the RTP message format of EVS or EVS compatibility mode; The media data of the EVS compatibility mode in the media message of described second subscriber equipment is converted to the media data of the first media formats, and uses the media data of the first media formats be converted to described in the encapsulation of the RTP message format of described first media formats.

If described first media formats is AMR-WB, due to this pattern and EVS holotype compatibility, therefore without the need to carrying out the code/decode format conversion of media data, only need to carry out media message format conversion.

Particularly, in one embodiment, after notification message is sent to user face by chain of command, following media conversion strategy can be determined according to this notification message in user face: the media data in the media message using the RTP message format encapsulation first user equipment of the RTP message format of EVS or AMR-WB to send, the RTP message format of use AMR-WB encapsulates the media data in the media message of the second subscriber equipment transmission.

In another embodiment, the media formats that chain of command adopts separately according to first user equipment and the second subscriber equipment determines media conversion strategy, and informs user face by notification message.Described media conversion strategy can be: the media data in the media message using the RTP message format encapsulation first user equipment of the RTP message format of EVS or AMR-WB to send, the RTP message format of use AMR-WB encapsulates the media data in the media message of the second subscriber equipment transmission.

In the above embodiment of the present invention, the message encapsulation format of employing when the RTP message format of EVS refers to and carries out the encapsulation of RTP message for the media data adopting EVS holotype encode to obtain, the message encapsulation format of employing when the RTP message format of EVS compatibility mode refers to and carries out the encapsulation of RTP message for the media data adopting EVS compatibility mode encode to obtain, the RTP message format of the first media formats refers to encode the message encapsulation format adopted when the media data that obtains carries out the encapsulation of RTP message for employing first media formats, the message encapsulation format that the RTP message format of AMR-WB adopts when referring to and carry out the encapsulation of RTP message for the media data adopting AMR-WB pattern-coding to obtain.

As previously mentioned, the chain of command handling process shown in Fig. 6 can be performed by the chain of command entity in chain of command equipment 300 or media changer devices 500.By chain of command equipment 300 as executive agent, and adopt SIP ((SessionInitiationProtocol between chain of command equipment 300 and user face equipment 400, session initiation protocol) when, in step 602, chain of command equipment 300 sends described notification message to user face equipment 400 by Session Initiation Protocol.When by media changer devices 500 as executive agent, in step 602, the chain of command entity of this equipment can adopt internal agreement to send described notification message to the user entity of this equipment.

Take executive agent as media changer devices 500 be example, in step 601, chain of command entity can receive and resolve chain of command signaling that media communication each side sends and the chain of command signaling that other network elements send, and obtains according to the signaling received the media formats that media communication each side adopts.

The embodiment of the present invention gives in circuit domain voice fallback scene and sets up in scene at media, and chain of command obtains the process of the media formats that media communication both sides adopt by media consultation process.Certainly, it is more typical two kinds of scenes that circuit domain voice fallback scene and media set up scene, but the embodiment of the present invention is not limited in the media formats obtaining media communication each side and adopt under these two kinds of scenes.

In circuit domain voice fallback scene, when side's subscriber equipment of media communication is switched to UTRAN/GERAN from E-UTRAN, by circuits for triggering territory voice fallback.Under this scene, the network element in CS territory can send to media changer devices 500 signaling comprising circuit domain voice fallback indication information, described circuit domain voice fallback indication information is used to indicate described first user equipment and is switched to circuit domain access network from packet domain access network, can indicate the media formats of the current employing of this subscriber equipment further.After the chain of command entity of media changer devices 500 receives this signaling, according to described circuit domain voice fallback indication information, the media formats that first user equipment and the second subscriber equipment adopt separately can be determined.

Set up in scene at media communication, first the subscriber equipment that media communication is carried out in request carries out media negotiation.In media consultation process, the signaling that the subscriber equipment of request media communication sends is sent to media changer devices 500.The chain of command entity of media changer devices 500 receives first user equipment and the signaling mutual in media consultation process of the second subscriber equipment, (English is: SessionDescriptionProtocol to obtain the SDP carried in described signaling, Chinese is: Session Description Protocol) information, according to the first user equipment of described acquisition and the SDP information of the second subscriber equipment, the media formats that described first user equipment and described second subscriber equipment adopt separately can be determined.

See Fig. 7, it is the user face handling process schematic diagram that the embodiment of the present invention provides.This flow process can comprise:

Step 701: user face receives the notification message that chain of command sends, described notification message is for notifying described user face equipment and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats of described second subscriber equipment transmission being converted to the media message that media formats is the first media formats;

Step 702: it is the media message of the first media formats that user face receives the media formats that described first user equipment sends, the media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, sends to described second subscriber equipment the media message that the media formats after changing is EVS compatibility mode;

Step 703: the media formats that reception described second subscriber equipment in user face sends is the media message of EVS compatibility mode, the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, sends to described first user equipment the media message that the media formats after changing is the first media formats.

Wherein, described EVS compatibility mode is AMR-WBIO pattern.

It should be noted that, the sequential of step 702 and step 703 is not strict with.Carry out media interaction at first user equipment and the second subscriber equipment, step 702 and step 703 may by multiple exercise.

If described first media formats and described second media formats incompatible, then in a step 702, the process that the media message that user sends in the face of described first user equipment carries out changing can comprise: by the media data of the first media formats in the media message of described first user equipment, be converted to the media data of EVS compatibility mode, and use the media data of the EVS compatibility mode of the EVS compatibility mode be converted to described in the encapsulation of the RTP message format of the RTP message format of EVS or EVS compatibility mode; Can comprise the process that the media message of described second subscriber equipment transmission is changed: the media data media data of the EVS compatibility mode in the media message of described second subscriber equipment being converted to the first media formats, and the media data using the first media formats be converted to described in the encapsulation of the RTP message format of described first media formats.

Wherein, further, carry media formats field in the media message of media formats after changing into EVS compatibility mode, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.Such as, use in the RTP media message after the RTP form encapsulation of EVS, (English is CMR: CodecModeRequest, Chinese is: code mode request) field request be EVS compatibility mode, to make the second subscriber equipment according to the content of this CMR field, EVS compatibility mode is used to encode to sending to the media data of first user equipment.

If described first media formats is AMR-WB, first media formats and the second media formats compatibility, then in a step 702, the process that the media message sent described first user equipment is changed can comprise: the use RTP message format of EVS or the RTP message format of AMR-WB encapsulate the media data in the media message of described first user equipment transmission; Can comprise the process that the media message of described second subscriber equipment transmission is changed: the media data in the media message using described second subscriber equipment of the RTP message format of AMR-WB encapsulation to send.Wherein, use in the RTP media message after the RTP form encapsulation of EVS, the request of CMR field be EVS compatibility mode, to make the second subscriber equipment according to the content of this CMR field, use EVS compatibility mode to encode to sending to the media data of first user equipment.

As in the foregoing embodiment, if carry the media conversion strategy that chain of command is determined in notification message, then media conversion is carried out according to this media conversion strategy in user face, if do not carry media conversion strategy in notification message, but carry the media format information of first user equipment and the employing of the second subscriber equipment, then media conversion strategy can be determined according to this information in user face.

By describing above and can finding out, in the embodiment of the present invention, at chain of command, determine the first user equipment that media data is mutual and the media formats that the second subscriber equipment adopts respectively, and send a notification message to user face, to make media message mutual between first user equipment and the second subscriber equipment faced by user change, thus realize media intercommunication.

Wherein, control can to comprise in the notification message that user oriented face sends the media format information that first user equipment and the second subscriber equipment adopt respectively, to make user face according to this information determination media conversion strategy; Inform user face by notification message after chain of command also can determine media conversion strategy, look like how to carry out media message conversion with indicating user.No matter be to determine media conversion strategy by chain of command, or determine media conversion strategy by user face, after the media message of first user equipment is changed, EVS compatibility mode is adopted to encode to sending to the media data of first user equipment by message notifying second subscriber equipment after this conversion, like this, although determine that the media formats that the second subscriber equipment adopts is EVS holotype at chain of command, but in user face, achieve the media formats of first user equipment and the second subscriber equipment based on EVS compatibility mode media data between intercommunication.

On the one hand, because EVS holotype and EVS compatibility mode can be compatible each other, therefore the decoder of the second subscriber equipment can be correctly decoded the media data of EVS compatibility mode, thus realizes media intercommunication; On the other hand, the second subscriber equipment is indicated to use EVS compatibility mode to encode to sending to the media data of first user equipment by media message, thus the conversion realized between the first media formats and EVS compatibility mode or intercommunication, change with by carrying out between the first media formats with EVS holotype or compared with intercommunication, the resource overhead of encoding and decoding can be reduced.

In order to more clearly understand the content described by the embodiment of the present invention, below in conjunction with Fig. 8 to Figure 13, by three preferred embodiments, above-mentioned flow process is described in detail.

Preferred embodiment one

Preferred embodiment one, for SIP calling, describes the process of establishing of voice call, and based on the process of AMR-WB encoding and decoding and EVS holotype encoding and decoding intercommunication under eSRVCC scene.

UE1 carries out voice call as caller request and UE2, and its voice call process of establishing can as shown in Figure 8, mainly comprise the following steps:

The step 801:UE1 request of making a call (the SIPINVITE message in figure), the media capability carrying UE1 employing is audio coding decoding EVS holotype (EVSPrimary).

Wherein, the SDP information of carrying in SIPINVITE message can comprise following content:

m＝audioxxxxxxRTP/AVP969798

a＝rtpmap:96EVS/16000/1

a＝fmtp:96br＝13.2-24.4；bw＝nb-swb；max-red＝220

a＝rtpmap:97AMR-WB/16000

a＝fmtp:97mode-change-capability＝2；max-red＝0

a＝rtpmap:98AMR/8000

a＝fmtp:98mode-change-capability＝2；max-red＝0

a＝sendrecv

a＝ptime:20

Above-mentioned SDP information shows the media name of UE1 and transmit port and media attribute information, and wherein, the media formats that UE1 adopts is EVSPrimary.The implication of above-mentioned SDP information can specify see SDP agreement.

The call request of step 802:UE1 is forwarded to Call-Control1 network, this call request is forwarded to UE2 by Call-Control1 network.Media changer devices 500 is comprised in described Call-Control1 network.

Step 803:UE2 receives this call request, and UE2 adopts EVSPrimary, UE2 to UE1 response message (183 message in figure), carries EVSPrimary coding/decoding capability in message.

Wherein, the SDP information of carrying in 183 message can comprise following content:

m＝audioxxxxxxRTP/AVP96

a＝rtpmap:96EVS/16000/1

a＝fmtp:96br＝13.2-24.4；bw＝nb-swb；max-red＝220

a＝sendrecv

a＝ptime:20

Above-mentioned SDP information shows the media name of UE2 and transmit port and media attribute information, and wherein, the media formats that UE2 adopts is EVSPrimary.The implication of above-mentioned SDP information can specify see SDP agreement.

Step 804: Call-Control1 network receives the response message of UE2, and this message is transmitted to UE1.

Step 805 ~ 810:UE2 replys.After UE1 receives the response message of UE2, between calling and called, media information completes alternately.After this use the EVSPrimary media formats negotiated to realize media mutual, such as can carry out the call of voice call or visual telephone.

After this, UE1 is switched to UTRAN/GERAN from E-UTRAN, circuits for triggering territory voice fallback, and Call-Control1 network performs process as shown in Figure 9:

Step 901 ~ 902: the chain of command entity (the chain of command entity in such as media changer devices 500) in Call-Control1 network receives the signaling that SRVCCIWF sends, wherein carry UE1 is switched to circuit domain access network indication information from packet domain access network, further, this indication information can also refer to illustrate that the media formats of the current employing of UE1 is AMR.UE1 is after access network switches, and the media formats of use is AMR.According to this indication information, this chain of command entity judges that UE1 and UE2 can not directly intercommunication.

Step 903: the media data of the AMR form that UE1 sends by the judgement of chain of command entity is converted to the media data of AMR-WBIO form, and will show to send to user entity by notification message by the indication information of court verdict.

Step 904: user entity prepares media encoding and decoding conversion resource, to realize media format conversion.

Step 905: user entity performs media format conversion process.

Specifically, the media format conversion process that user entity performs can as as-shown-in figures 10 a and 10b, comprise:

Receive the AMRRTP message that UE1 sends, from this message, obtain AMR coding payload, call AMR decoder and these coding payloads are decoded, recover primary speech signal, then with AMR-WB encoder, this primary speech signal is encoded, obtain AMR-WB coding payload.AMR-WB is encoded payload according to EVSRTP message lattice encapsulation RTP message, packaged EVSRTP message is sent to the EVS decoder of UE2 side UA.Wherein, the CMR field request in this EVSRTP message be the encoding/decoding mode of AMR-WB.

After the EVS decoder of UE2 side UA receives EVSRTP message, discovery message payload is AMR-WB, then decode according to the media payload of EVS compatibility mode to AMR-WB, decode voice signal.What find the request of CMR field is the coding mode of AMR-WB form simultaneously, then the EVS encoder of self is switched to compatibility mode, EVS encoder is according to the speech signal coding of compatibility mode to local terminal, coding payload format is AMR-WB form, and payload of then being encoded by the AMR-WB that EVS encoder encodes produces is packaged into RTP message according to EVS compatibility mode and sends to media changer devices 500.

The user entity of media changer devices 500 receives the RTP media message of EVS compatibility mode, therefrom obtain AMR-WB coding payload, call AMR-WB decoder to decode to these coding payloads, recover primary speech signal, then with AMR encoder, this primary speech signal is encoded, obtain AMR coding payload.Then payload of being encoded by this AMR is packaged into the RTP message of AMR, and packaged AMRRTP message is sent to SRVCCIWF.This AMRRTP message can be terminated by SRVCCIWF or be transmitted to UE1 through SRVCCIWF and terminate.

In above-mentioned flow process, part field relevant to encoding and decoding in the head of AMRRTP message can as shown in fig. lla, CMR=15, represents a certain pattern of request AMR; The form of EVSRTP message as shown in figure lib, wherein, can not comprise RTP head, only comprises the part that EVScodec is proprietary.CMR field in EVSRTP message has 8 bytes, as shown in fig. live, H represents head type identification bit, and T field is used to indicate the bandwidth of EVSAMR-WBIO pattern and EVSPrimary pattern, D field is used to indicate codec mode request, namely by D field request AMR-WB pattern.ToC field in EVSRTP message is used to indicate the type of the frame encapsulated in message, such as, and the frame of EVSPrimary (EVS holotype) or EVSAMR-WBIO (EVS compatibility mode) speech coding mode.

Alternatively, in above-mentioned steps 903, by this user entity, chain of command entity also directly by showing that UE2 adopts the indication information (than the first indication information as the aforementioned) of EVS holotype media formats to inform to user entity, can judge that the AMR formatted data by UE1 sends is converted to EVSAMR-WB formatted data.

Alternatively, in above-mentioned steps 904, user entity also can encapsulate AMR-WB coding payload according to the RTP message encapsulation format of AMR-WB, namely encapsulates AMR-WB coding payload according to RFC4867, obtain AMR-WBRTP message, and this AMR-WBRTP message is sent to the second subscriber equipment.

Alternatively, in above-mentioned steps 904, the AMR-WB coding payload adopting the network element of EVS encoding and decoding or UE2 also coding can be produced encapsulates AMR-WB coding payload according to the RTP message encapsulation format according to AMR-WB, namely AMR-WB coding payload is encapsulated according to RFC4867, obtain AMR-WBRTP message, and this message is sent to media changer devices 500.

Alternatively, in above-mentioned steps 904, if user entity receives AMR-WBRTP message (i.e. RFC4867 form), then directly obtain AMR-WB coding payload and decode voice signal.

Can be found out by the above-mentioned description to preferred embodiment one, directly intercommunication can be carried out in user face and EVS encoding and decoding for AMR-WB encoding and decoding, make the encoding and decoding conversion strategy in user face can not rely on the media negotiation result of chain of command on the one hand, on the other hand and photograph ratio will be carried out between AMR and EVS holotype, can system resource overhead be reduced, and then the call treatment specification under eSRVCC handoff scenario can be promoted.

Preferred embodiment two

Preferred embodiment two, for SIP calling, describes the process based on AMR-WB encoding and decoding and EVS holotype encoding and decoding intercommunication after media negotiation.

UE1 carries out voice call as caller request and UE2, and its voice call process of establishing can as shown in figure 12, mainly comprise the following steps:

The step 1201:UE1 request of making a call (the SIPINVITE message in figure), the media capability carrying UE1 employing is audio coding decoding EVS holotype (EVSPrimary).

The call request of step 1202:UE1 is forwarded to Call-Control1 network, this call request is forwarded to UE2 by Call-Control1 network.Alternatively, as shown in dotted outline in FIG., Call-Control1 network may add other extra encoding and decoding in call request, as G.729.Media changer devices 500 is comprised in described Call-Control1 network.

Step 1203:UE2 receives this call request, and UE2 adopts G.729 encoding and decoding, and UE2, to UE1 response message (183 message in figure), carries G.729 coding/decoding capability in message.

Step 1204: Call-Control1 network receives the response message of UE2, and this message is transmitted to UE1.

Step 1205 ~ 1210:UE2 and UE1 carries out interacting message based on Call-Control1 network.After UE1 receives the response message of UE2, between calling and called, media information completes alternately.

Step 1211: the chain of command entity of media changer devices 500 judges that UE1 and UE2 can not directly intercommunication, then select AMR-WB encoding and decoding for UE2, AMR encoding and decoding are selected for UE1, and will the indication information (the second indication information as the aforementioned) of court verdict be shown, the user entity of media changer devices 500 is sent to by notification message, media encoding and decoding conversion resource is prepared, to realize media format conversion by user entity.

Step 1212: the user entity of media changer devices 500 performs media format conversion process.

Specifically, the media format conversion process that the user entity of media changer devices 500 performs can as comprised:

Receive the G.729RTP message that UE1 sends, from this message, obtain payload of G.729 encoding, call G.729 decoder and these coding payloads are decoded, recover primary speech signal, then with AMR-WB encoder, this primary speech signal is encoded, obtain AMR-WB coding payload.AMR-WB is encoded payload according to EVSRTP message lattice encapsulation RTP message, packaged EVSRTP message is sent to the EVS decoder of UE2 side UA.Wherein, the CMR field request in this EVSRTP message be the encoding/decoding mode of AMR-WB.

The user entity of media changer devices 500 receives the RTP media message of EVS compatibility mode, therefrom obtain AMR-WB coding payload, call AMR-WB decoder to decode to these coding payloads, recover primary speech signal, then with G.729 encoder, this primary speech signal is encoded, obtain AMR and to encode payload.Then payload of being encoded by this AMR is packaged into the RTP message of AMR, and packaged AMRRTP message is sent to SRVCCIWF.This AMRRTP message can be terminated by SRVCCIWF or be transmitted to UE1 through SRVCCIWF and terminate.

Alternatively, in above-mentioned steps 1211, by this user entity, the chain of command entity of media changer devices 500 also directly by showing that UE2 adopts the indication information (the first indication information as the aforementioned) of EVS holotype media formats to inform to user entity, can judge that the G.729 formatted data by UE1 sends is converted to AMR-WB formatted data.

Alternatively, in above-mentioned steps 1212, user entity also can encapsulate AMR-WB coding payload according to the RTP message encapsulation format of AMR-WB, namely encapsulates AMR-WB coding payload according to RFC4867, obtain AMR-WBRTP message, and this message is sent to the second subscriber equipment.

Alternatively, in above-mentioned steps 1212, the AMR-WB coding payload adopting the network element of EVS encoding and decoding or UE2 also coding can be produced encapsulates AMR-WB coding payload according to the RTP message encapsulation format according to AMR-WB, namely AMR-WB coding payload is encapsulated according to RFC4867, obtain AMR-WBRTP message, and this message is sent to media changer devices 500.

Alternatively, in above-mentioned steps 1212, if user entity receives AMR-WBRTP message (i.e. RFC4867 form), then directly obtain AMR-WB coding payload and decode voice signal.

Can be found out by the above-mentioned description to preferred embodiment two, the resource capability in Call-Control1 network user face need not be concerned about in Call-Control1 network-based control face, determine whether realize the intercommunication with EVS encoding and decoding based on AMR-WB by user face oneself, thus the judgement of chain of command can be simplified, namely chain of command is directly held consultation according to EVS encoding and decoding and UE, need not pay close attention to user and look like what realization.This when chain of command is separated with user face (not on an in-one device) is especially meaningful, chain of command is without the resource situation in concerned with user face, directly carry out service negotiation according to actual business requirement, optimization when self completing media intercommunication by user face.

Preferred embodiment three

Preferred embodiment three, for SIP calling, describes the process realizing AMR-WB encoding and decoding and EVS holotype encoding and decoding intercommunication based on media message format conversion.

UE1 carries out voice call as caller request and UE2, and its voice call process of establishing can as shown in figure 13, mainly comprise the following steps:

The step 1301:UE1 request of making a call (the SIPINVITE message in figure), the media capability carrying UE1 employing is audio coding decoding EVS holotype (EVSPrimary).

The call request of step 1302:UE1 is forwarded to Call-Control1 network, this call request is forwarded to UE2 by Call-Control1 network.Alternatively, as shown in dotted outline in FIG., Call-Control1 network may add other extra encoding and decoding in call request, as AMR-WB.Media changer devices 500 is comprised in described Call-Control1 network.

Step 1303:UE2 receives this call request, and UE2 adopts AMR-WB encoding and decoding, and UE2, to UE1 response message (183 message in figure), carries AMR-WB coding/decoding capability in message.

Step 1304: Call-Control1 network receives the response message of UE2, and this message is transmitted to UE1.

Step 1305 ~ 1310:UE2 and UE1 carries out interacting message based on Call-Control1 network.After UE1 receives the response message of UE2, between calling and called, media information completes alternately.

Step 1311: the chain of command entity of media changer devices 500 judges that UE1 and UE2 can directly intercommunication, then determine to carry out message format conversion by user face.Such as, can send a notification message to user entity, wherein carry the second indication information, be used to indicate and how to carry out media message format conversion.

Step 1312: the user entity of media changer devices 500 performs message format transfer process.

Specifically, the message format transfer process that the user entity of media changer devices 500 performs can as comprised:

Receive the EVSRTP message that UE1 sends, obtain AMR-WB coding payload from this message, packaged AMR-WBRTP message, according to AMR-WBRTP message lattice encapsulation RTP message, sends to UE2 side by payload of being encoded by this AMR-WB.

After the EVS decoder of UE2 side UA receives EVSRTP message, discovery message payload is AMR-WB, then decode according to the media payload of EVS compatibility mode to AMR-WB, decode voice signal.To the speech signal coding of local terminal, coding payload format is AMR-WB form, and payload of then being encoded by the AMR-WB that EVS encoder encodes produces is packaged into RTP message according to EVS compatibility mode and sends to media changer devices 500.

The user entity of media changer devices 500 receives the RTP media message of EVS compatibility mode, therefrom obtains AMR-WB coding payload, and payload of being encoded by this AMR is packaged into EVSRTP message, and packaged EVSRTP message is sent to SRVCCIWF.This EVSRTP message can be terminated by SRVCCIWF or be transmitted to UE1 through SRVCCIWF and terminate.Wherein, what encapsulate the CMR field request of the EVSRTP message obtained is EVS compatibility mode, encodes with AMR-WB pattern to make UE1 to sending to the media data of UE2.

Alternatively, in above-mentioned steps 1311, the chain of command entity of media changer devices 500 also directly by showing that UE2 adopts the indication information of EVS holotype media formats to inform to user entity, can be adjudicated the format conversion mode of media message by this user entity.

Alternatively, in above-mentioned steps 1312, the AMR-WB coding payload adopting the network element of EVS encoding and decoding or UE1 also coding can be produced encapsulates AMR-WB coding payload according to the RTP message encapsulation format according to AMR-WB, namely AMR-WB coding payload is encapsulated according to RFC4867, obtain AMR-WBRTP message, and this message is sent to media changer devices 500.

Alternatively, in above-mentioned steps 1312, the user entity decapsulation AMR-WB obtained in the media message of the second subscriber equipment transmission encodes after payload, also this AMR-WB coding payload can be encapsulated according to the RTP message encapsulation format of AMR-WB, namely AMR-WB coding payload is encapsulated according to RFC4867, obtain AMR-WBRTP message, and this message is sent to first user equipment.

Alternatively, in above-mentioned steps 1312, if user entity receives the AMR-WBRTP message (i.e. RFC4867 form) that UE2 sends, then directly obtain AMR-WB coding payload and decode voice signal.

By finding out the description of above preferred embodiment three, the user face of Call-Control1 network is AMR-WB code/decode format side in side when being EVS code/decode format, without the need to carrying out the conversion of media payload type again, only needing to carry out RTP message encapsulation format and changing.Which has saved encoding and decoding payload tts resource greatly.

Based on identical technical conceive, the embodiment of the present invention additionally provides a kind of media conversion chain of command equipment, a kind of media conversion user face equipment, and a kind of media changer devices.

See Figure 14 a or Figure 14 b, the chain of command equipment 600 provided for the embodiment of the present invention and the structural representation of chain of command equipment 610.Determination module 61 and notification module 62 can be comprised in chain of command equipment 600 or chain of command equipment 610, wherein:

Determination module 61, for determining that first user equipment adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, and described second media formats is EVS holotype; Notification module 62, for to user face equipment dispatch order message, described notification message is for notifying described user face equipment the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends being converted to the media message that media formats is the first media formats.

In one implementation, described notification message comprises the information of described first media formats and the information of described second media formats.

In another kind of implementation, as shown in fig. 14b, also decision-making module 63 can be comprised in chain of command equipment 610.Decision-making module 63, for determining that according to described first media formats and described second media formats described user face equipment adopts EVS compatibility mode to communicate with described second subscriber equipment, described first media formats is adopted to communicate with described first user equipment.In this case, described notification message comprises the result that described chain of command equipment is determined.

For chain of command equipment 600 or chain of command equipment 610, when described first media formats is AMR-WB, described notification message is for notifying that the described RTP message format of user face equipment use EVS or the RTP message format of AMR-WB encapsulate the media data in the media message of described first user equipment transmission, and the media data in the media message using described second subscriber equipment of the RTP message format of AMR-WB encapsulation to send.

See Figure 15 a or Figure 15 b, the user face equipment 700 provided for the embodiment of the present invention and the structural representation of user face equipment 710.Receiver module 71, first modular converter 72 and the second modular converter 73 can be comprised in user face equipment 700 or user face equipment 710, wherein:

Receiver module 71, for receiving the notification message that chain of command equipment sends, described notification message is for notifying described user face equipment and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats of described second subscriber equipment transmission being converted to the media message that media formats is the first media formats;

First modular converter 72, the media formats sent for receiving described first user equipment is the media message of the first media formats, the media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, sends to described second subscriber equipment the media message that the media formats after changing is EVS compatibility mode;

Second modular converter 73, the media formats sent for receiving described second subscriber equipment is the media message of EVS compatibility mode, the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, sends to described first user equipment the media message that the media formats after changing is the first media formats.

Wherein, first modular converter 72 change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

In another kind of implementation, when described notification message comprises the information of the information of described first media formats and described second media formats, as illustrated in fig. 15b, in user face equipment 710, also can comprise decision-making module 74.Decision-making module 74, for the information of described first media formats that comprises according to described notification message and the information of described second media formats, determine to adopt EVS compatibility mode to communicate with described second subscriber equipment, adopt the first media formats to communicate with described first user equipment.

In above-mentioned chain of command equipment 600 or chain of command equipment 610, the first modular converter 72, also for use the RTP message format of the realtime transmission protocol RTP message format of EVS or EVS compatibility mode encapsulate described in the media data of EVS compatibility mode that is converted to; Second modular converter 73 is also for using the media data of the first media formats be converted to described in the encapsulation of the RTP message format of the first media formats.

In above-mentioned chain of command equipment 600 or chain of command equipment 610, when described first media formats is AMR-WB, the first modular converter 72 can encapsulate the media data in the media message of described first user equipment transmission specifically for the use RTP message format of EVS or the RTP message format of AMR-WB; Second modular converter 73 can specifically for using the media data in the media message of the described second subscriber equipment transmission of the RTP message format of AMR-WB encapsulation.

See Figure 16, it is the structural representation of the media changer devices 800 that the embodiment of the present invention provides.Media changer devices 800 can comprise: chain of command entity 81 and user entity 82, wherein:

Chain of command entity 81, for determining that first user equipment adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, and described second media formats is for strengthening voice service EVS holotype; And, to user face equipment dispatch order message, described notification message is for notifying described user face equipment and the media message that the media formats that described first user equipment sends is the first media formats is converted to the media message that media formats is EVS compatibility mode and the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends being converted to the media message that media formats is the first media formats;

User entity 82, the media formats sent for receiving described first user equipment is the media message of the first media formats, the media message being the first media formats by the media formats that described first user equipment sends is converted to the media message that media formats is EVS compatibility mode, sends to described second subscriber equipment the media message that the media formats after changing is EVS compatibility mode; And, the media formats receiving described second subscriber equipment transmission is the media message of EVS compatibility mode, the media message being EVS compatibility mode by the media formats that described second subscriber equipment sends is converted to the media message that media formats is the first media formats, sends to described first user equipment the media message that the media formats after changing is the first media formats.

Wherein, described user entity change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

In one implementation, described notification message comprises the information of described first media formats and the information of described second media formats.In this case, user entity 82 is also for the information of described first media formats that comprises according to described notification message and the information of described second media formats, determine that described employing EVS compatibility mode communicates with described second subscriber equipment, adopt described first media formats to communicate with described first user equipment.

In another kind of implementation, chain of command entity 81 also for determining that according to described first media formats and described second media formats described user face equipment adopts EVS compatibility mode to communicate with described second subscriber equipment, adopts described first media formats to communicate with described first user equipment.In this case, wherein, described notification message comprises the result that described chain of command equipment is determined.

Further, user entity 82 is also for using the media data of the EVS compatibility mode be converted to described in the encapsulation of the RTP message format of the realtime transmission protocol RTP message format of EVS or EVS compatibility mode; And, use the media data of the first media formats be converted to described in the encapsulation of the RTP message format of the first media formats.

Further, when described first media formats is AMR-WB, user entity 82 can encapsulate the media data in the media message of described first user equipment transmission specifically for the use RTP message format of EVS or the RTP message format of AMR-WB; And, the media data in the media message using described second subscriber equipment of the RTP message format of AMR-WB encapsulation to send.

In sum, the embodiment of the present invention is when carrying out EVS encoding and decoding and format conversion is carried out in other media encoding and decoding, if chain of command has been consulted into EVS holotype, in user face, by the information interaction of RTP message, request EVS encoding and decoding switch to the compatibility mode of EVS, namely when receiving and be correctly decoded AMR-W encoded media message, EVS encoding and decoding can also be made according to the code/decode format encoded media message of AMR-WB, and the media message that this EVS codec is sent can be correctly decoded by the decoder of AMR-WB.By above realization, when meeting basic intercommunication, the media conversion resource of media encoding and decoding conversion gateway can be saved.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims

1. a media interoperability methods, is characterized in that, described method comprises:

Chain of command equipment determination first user equipment adopts the first media formats, adopts the second media formats with the second subscriber equipment of described first user devices communicating, wherein, described first media formats is different from described second media formats, and described second media formats is for strengthening voice service EVS holotype;

2. the method for claim 1, is characterized in that, described notification message comprises the information of described first media formats and the information of described second media formats.

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

According to described first media formats and described second media formats, described chain of command equipment determines that described user face equipment adopts EVS compatibility mode to communicate with described second subscriber equipment, adopt described first media formats to communicate with described first user equipment;

Wherein, described notification message comprises the result that described chain of command equipment is determined.

4. method as claimed any one in claims 1 to 3, it is characterized in that, described method also comprises:

5. method as claimed any one in claims 1 to 3, it is characterized in that, described first media formats is wideband adaptive multi tate AMR-WB;

6. a media interoperability methods, is characterized in that, comprising:

7. method as claimed in claim 6, it is characterized in that, described change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

8. method as claimed in claims 6 or 7, it is characterized in that, described notification message comprises the information of described first media formats and the information of described second media formats;

Described method also comprises:

The information of described first media formats that described user face equipment comprises according to described notification message and the information of described second media formats, determine to adopt EVS compatibility mode to communicate with described second subscriber equipment, adopt the first media formats to communicate with described first user equipment.

9. the method according to any one of claim 6 to 8, is characterized in that, described method also comprises:

10. method as claimed in claim 6, it is characterized in that, described first media formats is wideband adaptive multi tate AMR-WB;

11. 1 kinds of media interoperability methods, is characterized in that, comprising:

12. methods as claimed in claim 11, it is characterized in that, described change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

13. methods as described in claim 11 or 12, it is characterized in that, described notification message comprises the information of described first media formats and the information of described second media formats;

Described method also comprises:

The information of described first media formats that described user entity comprises according to described notification message and the information of described second media formats, determine to adopt EVS compatibility mode to communicate with described second subscriber equipment, adopt the first media formats to communicate with described first user equipment.

14. methods as described in claim 11 or 12, it is characterized in that, described method also comprises:

According to described first media formats and described second media formats, described chain of command entity determines that described user entity adopts EVS compatibility mode to communicate with described second subscriber equipment, adopt described first media formats to communicate with described first user equipment;

Wherein, described notification message comprises the result that described chain of command entity is determined.

15. methods according to any one of claim 11 to 14, it is characterized in that, described method also comprises:

16. methods as claimed in claim 11, is characterized in that, described first media formats is wideband adaptive multi tate AMR-WB;

17. 1 kinds of chain of command equipment, is characterized in that, comprising:

18. chain of command equipment as claimed in claim 17, is characterized in that, described notification message comprises the information of described first media formats and the information of described second media formats.

19. chain of command equipment as claimed in claim 17, is characterized in that, also comprise:

Decision-making module, for determining that according to described first media formats and described second media formats described user face equipment adopts EVS compatibility mode to communicate with described second subscriber equipment, described first media formats is adopted to communicate with described first user equipment;

20. chain of command equipment according to any one of claim 18 to 19, it is characterized in that, described first media formats is wideband adaptive multi tate AMR-WB;

21. 1 kinds of user face equipment, is characterized in that, comprising:

22. user face as claimed in claim 21 equipment, it is characterized in that, described first modular converter change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

23. user face equipment as described in claim 21 or 22, it is characterized in that, described notification message comprises the information of described first media formats and the information of described second media formats;

Described user face equipment also comprises:

24. user face equipment according to any one of claim 21 to 23, is characterized in that,

Described first modular converter, also for using the media data of the EVS compatibility mode be converted to described in the encapsulation of the RTP message format of the realtime transmission protocol RTP message format of EVS or EVS compatibility mode;

Described second modular converter, also for using the media data of the first media formats be converted to described in the encapsulation of the RTP message format of the first media formats.

25. user face as claimed in claim 21 equipment, is characterized in that, described first media formats is wideband adaptive multi tate AMR-WB;

26. 1 kinds of media changer devices, is characterized in that, comprising:

27. media changer devices as claimed in claim 26, it is characterized in that, described user entity change after the media message of media formats into EVS compatibility mode in carry media formats field, described media formats field is for notifying that described second subscriber equipment uses EVS compatibility mode to encode to the media data that described second subscriber equipment sends to described first user equipment.

28. media changer devices as described in claim 26 or 27, it is characterized in that, described notification message comprises the information of described first media formats and the information of described second media formats;

29. media changer devices as described in claim 26 or 27, it is characterized in that, described chain of command entity, also for determining that according to described first media formats and described second media formats described user face equipment adopts EVS compatibility mode to communicate with described second subscriber equipment, described first media formats is adopted to communicate with described first user equipment;

30. media changer devices according to any one of claim 26 to 27, it is characterized in that, described user entity, also for using the media data of the EVS compatibility mode be converted to described in the encapsulation of the RTP message format of the realtime transmission protocol RTP message format of EVS or EVS compatibility mode; And, use the media data of the first media formats be converted to described in the encapsulation of the RTP message format of the first media formats.

31. media changer devices as claimed in claim 26, is characterized in that, described first media formats is wideband adaptive multi tate AMR-WB;

Described user entity, encapsulates the media data in the media message of described first user equipment transmission specifically for the use RTP message format of EVS or the RTP message format of AMR-WB; And, the media data in the media message using described second subscriber equipment of the RTP message format of AMR-WB encapsulation to send.