CN107689945A - Media changer devices control method, device and WMG - Google Patents
Media changer devices control method, device and WMG Download PDFInfo
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- CN107689945A CN107689945A CN201610638541.6A CN201610638541A CN107689945A CN 107689945 A CN107689945 A CN 107689945A CN 201610638541 A CN201610638541 A CN 201610638541A CN 107689945 A CN107689945 A CN 107689945A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1083—In-session procedures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/765—Media network packet handling intermediate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
Abstract
The embodiment of the present invention provides a kind of media changer devices control method, device and WMG, the first media data of second user equipment is sent to by media changer devices by the first user terminal of acquisition, determine the need for allowing media changer devices to be operated under transcoding pattern, when it is determined that coded system is the coded system that second user terminal can not be compatible used by the first user terminal, control media changer devices are operated under transcoding pattern.Among the program, the scheme of media changer devices mode of operation is controlled to control media changer devices mode of operation again after generating control message with respect to the SDP information on chain of command by the media data of medium surface, interrupt the scheme up to several seconds to more than ten seconds, duration for cut call can largely be shortened, realize the effect of fast quick-recovery call, the quality of carrier supplying service is ensure that, ensure that the interests of Consumer's Experience and operator.
Description
Technical field
The present invention relates to the communications field, more particularly to media changer devices control method, device and WMG.
Background technology
When terminal needs to be conversed with another terminal, two terminals can be by communication process, terminal
Need to gather the voice signal in its local environment, and the acoustic information collected is subjected to coding and forms media data, for
Two terminals carry out the terminal of video calling, and participate in coding also includes the image information that terminal collects.It is established in call
Before, both call sides will be negotiated by Call- Control1 network should each be compiled using which kind of coded system to media data
Code, with reference to the SRVCC shown in Fig. 1, (Single Radio Voice Call Continuity, single channel audio call connect
Continuous business) interaction figure shown in networking diagram and Fig. 2 under scene establishes the process of call to two terminals and is described briefly：
S201, second terminal 15 initiate call request.
The call request that second terminal 15 is initiated can be transmitted by SIP signalings, in SIP signalings, second terminal
15 media that its support can be carried by SDP (Session Description Protocol, Session Description Protocol) information are compiled
The information of code ability.It is assumed that EVS (Enhanced Voice Services, enhanced voice call that second terminal is currently employed
Service encoding and decoding) holotype (Primary) carry out media data coding.
S202, Call- Control1 network forward call request to first terminal 11.
The calling of initiation reaches Call- Control1 network by base station (or node device) 12 grade, and Call- Control1 network includes
MSC (Mobile Switching Centre, mobile switching centre) 13 and SCC AS (Service Centralization
And Continuity Application Server, service set and application server for continuity) 14 etc..Call- Control1 net
The call request can be transmitted to object --- the first terminal 11 that second terminal 15 asks call by network.
S203, first terminal 11 receive and send response message to second terminal 15 after call request.
It is assumed that EVS Primary encoding and decoding energy is also carried in the response message that first terminal 11 is sent to second terminal 15
Power.
S204, Call- Control1 network receive the response message of first terminal 11, and forward that message to second terminal 15.
In this case, EVS can be passed through by the negotiation of chain of command, second terminal 15 and first terminal 11
Primary coded systems realize that media data interacts, on this basis, as long as first terminal 11 is connected after phone generation response
It can be carried out call.At this time, for medium surface between first terminal 11 and second terminal transmission media data it is logical
Road is through, do not need what any intermediate equipment forwarded, i.e. " first terminal 11<--->Second terminal 15 ", as first in Fig. 1
Media data path 16.
Once any one party among first terminal 11 and second terminal 15 no longer supports EVS Primary coded systems,
Such as second terminal 15 enters CS (Circuti from IMS (IP Multimedia Subsystem, IP multimedia subsystem) domain
Switch, circuit switching) domain, because the coded system of EVS holotypes is not supported in CS domains, at this time second terminal 15 can only be supported
AMR-WB (Adaptive Multi-Rate-Wideband, wideband adaptive multi-speed encoding/decoding) coded system.And AMR-WB
With EVS holotypes be can not be compatible two kinds of coding modes, so first terminal 11 and second terminal 15 can not reuse
The coded system of each self-supporting directly carries out communicating, and can increase MGW (Media Gateway, WMG) between
17, at this time the carrying path of medium surface be changed into " first terminal 11<--->WMG 17<--->Second terminal 15 ".If
The coded system that first terminal 11 and second terminal 15 use can be compatible, then WMG 17 receive media data it
Afterwards, media data is not recompiled, just directly sent out after may the encapsulation format at media data reception end be Resealed
Receiving terminal is given, this mode of operation of WMG is referred to as exempting from transcoding pattern.But if first terminal 11 and second terminal
15 coded systems used are incompatible, then this mode of operation of WMG 17 is just no longer proved effective, in this case, existing
There is technology by such two kinds of main settling modes：
The first, the SDP information that Call- Control1 network reports according to chain of command determines first terminal 11 and second terminal
After 15 coded systems currently supported are incompatible, service set and application server for continuity are passed through by mobile switching centre 13
14 send control message to first terminal 11 from chain of command, and the coded system for allowing first terminal 11 to be used passes through by EVS master
Pattern switching for can compatible AMR-WB coded system.This control message also passes through some base stations (or node) 12
It could be received afterwards by first terminal 11, the generation of control message is with transmitting procedure along with first terminal 11 disappears according to control
The process that breath switches its coded system may spend time of several seconds to more than ten seconds, during this period of time, first terminal 11 and the
It can not be communicated between two terminals 15, call is in interrupt status.
Second, the SDP information that Call- Control1 network reports according to chain of command message chain of command determines first terminal 11
After the coded system currently supported with second terminal 15 is incompatible, mobile switching centre 13 therein can be issued by chain of command
Control message, control WMG 17 are operated under transcoding mode of operation, and under transcoding pattern, WMG 17 can use transcoding
Resource is entered to the media data interacted between the first user terminal and second terminal using the coded system of data receiver
Row recompiles.Although this control mode can shorten the time of dropped calls between first terminal 11 and second terminal 15, allow
Recover the time advance of normal talking, but on the whole, control message is issued by chain of command to control WMG to switch
The way of mode of operation or slow, still can allow dropped calls for a period of time.
So above two mode can all allow dropped calls for a period of time, although the two time interrupted only arrived at several seconds
Between more than ten seconds, but for a user, this can not only make troubles to it, or even it is also possible to cause huge loss, because
For within this period of time, user may need that the important information of opposite end is passed on or received to opposite end；In addition, substantial amounts of user
Because such case is forced dropped calls, cause user experience low, this may cause the complaint of large area user, and this is to fortune
Seek for the interests and service quality of business, be all a kind of infringement.Therefore, need proposition a solution badly now, conversing
When occurring the incompatible situation of coded system of both call sides in journey, the call of both call sides is allowed from interrupting quick recover just
Often.
The content of the invention
Media changer devices control method, device and WMG provided in an embodiment of the present invention, the technology mainly solved
Problem is：It is proposed it is a kind of unlike the prior art, for allowing call double in the case of the coded system difference of both call sides
The fast quick-recovery of call just interrupted is normal.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of media changer devices control method, including：
Obtain the first media data that the first user terminal is sent to second user terminal by media changer devices；
When it is determined that the first coded system and the second volume used in the second user terminal of first media data
When code mode is incompatible, the media changer devices are controlled to be operated under transcoding pattern；Under the transcoding pattern, the matchmaker
Body conversion equipment is using transcoding resource to the media data that is interacted between first user terminal and the second terminal
Recompiled using the coded system of data receiver.
The embodiment of the present invention also provides a kind of media changer devices control device, including：
Acquisition module, the first of second user terminal is sent to by media changer devices for obtaining the first user terminal
Media data；
Control module, for when the first coded system and the second user terminal institute that determine first media data
When the second coded system used is incompatible, the media changer devices are controlled to be operated under transcoding pattern；In the transcoding
Under pattern, the media changer devices are using transcoding resource to being handed between first user terminal and the second terminal
Mutual media data is recompiled using the coded system of data receiver.
The embodiment of the present invention also provides a kind of computer-readable storage medium, and computer is stored with the computer-readable storage medium
Executable instruction, the computer executable instructions are used for the media changer devices control method for performing foregoing any one.
The beneficial effects of the invention are as follows：
Media changer devices control method, device, WMG and the computer provided according to embodiments of the present invention is deposited
Storage media, the first media data of second user equipment is sent to by media changer devices by the first user terminal of acquisition,
Then determined the need for allowing media changer devices to be operated under transcoding pattern according to the coded system of the first media data, when true
Coded system is that second user terminal can not used by fixed first user terminal is sent to the media data of second user terminal
During compatible coded system, control media changer devices are operated under transcoding pattern, using transcoding resource to first terminal and the
The media data of interaction is recompiled according to the compatible coded system of data receiver between two terminals.Work as in the program
In, the foundation of control media changer devices mode of operation is the coded format of the first media data, so whole according to the first user
Hold and just can determine that out two in its first the first media data of frame sent with the coded format of second user terminal room after incompatible
Communicating requirement media changer devices between person are operated in transcoding pattern.That is, in scheme provided in an embodiment of the present invention
Central, the first user terminal is sent to media data at most one frame of loss of second user terminal, it is possible to allows therebetween
Communication recovery is normal, and for being gone up from the time, the time and the duration of even more than ten seconds several seconds that send a frame data are compared
Want short too many.So the scheme of media changer devices mode of operation is controlled with respect to control by the media data of medium surface
Media changer devices mode of operation is controlled again after SDP information generation control message on face processed, is interrupted and is up to several seconds to more than ten
The scheme of second, can largely shorten duration for cut call, realize the effect of fast quick-recovery call, it is ensured that operator
The quality of service is provided, ensure that the interests of Consumer's Experience and operator.
Brief description of the drawings
Fig. 1 is a kind of networking diagram under SRVCC scenes；
Fig. 2 is interaction figure when two terminals establish call；
Fig. 3 is a kind of flow chart for the media changer devices control method that the embodiment of the present invention one provides；
Fig. 4 is a kind of structural representation for the media changer devices control device that the embodiment of the present invention three provides；
Fig. 5 is a kind of structural representation for the media changer devices control device that the embodiment of the present invention four provides；
Fig. 6 is a kind of hardware architecture diagram for the server that the embodiment of the present invention five provides；
Fig. 7 is a kind of hardware architecture diagram for the WMG that the embodiment of the present invention five provides.
Embodiment
The embodiment of the present invention is described in further detail below by embodiment combination accompanying drawing.
Embodiment one：
In communication process, if occurring the incompatible feelings of media data encoding mode that both call sides use suddenly
Condition, then both call sides are it is possible that the interruption of a period of time, in the prior art, this interruption for up to several seconds even
More than ten seconds, this may influence Consumer's Experience to a certain extent, and therefore, the present embodiment will propose a kind of media changer devices
Control method, on the basis of existing technology, reducing the time of dropped calls, ensure the speech quality of user.
The media changer devices control method that the present embodiment provides can be implemented on media changer devices control device, under
The media changer devices control method that the present embodiment provides is introduced with reference to Fig. 3 for face：
S302, media changer devices control device obtain the first user terminal and are sent to the second use by media changer devices
First media data of family terminal.
For SRVCC scenes, some introductions are above being done, according to the content people in the art shown in Fig. 1
Member should be it will be appreciated that in SRVCC scenes, and on medium surface, the first user terminal is that media data directly is sent into media
Conversion equipment, that is to say, that under SRVCC scenes, the carrying path of medium surface should be " the first user terminal<--->Matchmaker
Body conversion equipment<--->Second user terminal ", so in such a scenario, media changer devices control device can be obtained directly
The first user terminal is taken to be sent to the first media data of media changer devices.
And eSRVCC (exhale by Enhanced Single Radio Voice Call Continuity, enhancing single channel voice
It is continuous business) it is on the basis of SRVCC, add ATCF and (Access Transfer Control Function, transmit and visit
Ask control unit), as SCC AS preposition network element, SCC AS are substituted as signaling plane anchor point, and the also works of ATCF together
For the ATGW (Access Transfer Gateway, transmit access gateway) of medium surface anchor point, when the first user terminal and second
When user terminal carries out media data interaction using identical coded system, for example, the coded system due to EVS holotypes
Can extended audio bandwidth, it provides ultra wide band and full band encodes, while also improves the voice matter that arrowband and broadband provide
Amount, so when first terminal and second terminal can use EVS holotypes, typically using EVS holotypes.So
In this case, the carrying path of medium surface is " the first user terminal<--->ATGW<--->Second user terminal ".At this
Under kind scene, the media data between the first user terminal and second user terminal will necessarily pass through ATGW, for the first user
For terminal, the coded format of its media data between ATGW it has been determined that so, no matter the coding of second user terminal
How mode switches, and the first user terminal will not be influenceed by second user terminal all the time.Therefore, when the first user terminal with
Between second user terminal under eSRVCC scenes, if second user terminal has arrived CS domains, no longer EVS holotypes are supported to compile
Code, can only use AMR-WB coding modes, then its carrying of medium surface between the first user terminal path can be changed into " the first use
Family terminal<--->ATGW<--->Media changer devices<--->Second user terminal ", at this moment, media changer devices control device
The first media data obtained is no longer directed to the first user terminal, because the first user terminal can be by the first media data
It is sent to ATGW and WMG is sent it to by ATGW again afterwards.
On the basis of the above, its coded system is switched to by the user terminal of chain of command message informing first in the prior art
So that among the way for fast quick-recovery of conversing, the control message of chain of command does not have to be delivered at the first user terminal, but transmits
To ATCF corresponding with ATGW, ATGW is notified to change its coded system after control message is received by ATCF, so as to
Realize the call recovery with second user terminal room.This can shorten the duration of dropped calls to a certain extent, but this
According further to chain of command message come what is be controlled, the time of generation to the transmission of chain of command control message still exists mode,
Only transmission time is somewhat shorter.The control method of the media changer devices provided according to the present embodiment, at this time,
Media changer devices control device can get the first matchmaker that the first user terminal is sent to media changer devices by ATGW
Volume data.
S304, media changer devices control device determine the first coded system and second user terminal of the first media data
Used second coded system is incompatible.
In the present embodiment, coded system --- the second coded system that the first media data uses with second user terminal
Incompatible situation refers to incompatible second coded system of the first coded system, and the second coded system also incompatible first encodes
Mode, typical several incompatible situations include：Any one party uses in first user terminal and second user terminal
The holotype of enhanced voice call service encoding and decoding, i.e. EVS Primary patterns, the opposing party use EVS compatibility modes；
Any one either in the first coded system and the second coded system is EVS Primary patterns, and the opposing party is broadband
Self-adaption multi-speed encoding/decoding mode, i.e. AMR-WB patterns.
Under SRVCC and eSRVCC scene, when the first user terminal or second user terminal are from IMS domain switching value CS
Domain, the most frequently used replacement coded system are exactly AMR-WB modes, and AMR-WB encoding and decoding are 3GPP (3rd Generation
Partnership Project, third generation partner program) the broadband multi-rate speech encoding and decoding for 3G network that define
Algorithm, it handles a width of 50Hz~7000Hz of voice spectrum band, is one of now widely used high definition encoding and decoding.
S306, media changer devices control device control media changer devices are operated under transcoding pattern.
Some introductions above had been carried out to the transcoding mode of operation of media changer devices, under transcoding mode of operation,
Media changer devices can use transcoding resource to use the media data interacted between the first user terminal and second terminal
The coded system of data receiver is recompiled, i.e., the first user terminal is sent to the media data of second user terminal
The coded system currently supported according to second user terminal is sent to second user terminal after being recompiled, likewise,
The media data that second user terminal can be also sent to the first user terminal in other words may be used according to the first user terminal is recognizable
The coded system of support recompiles.For example, among an example, the first user terminal and second user terminal all use
EVS holotypes are encoded to media data, but after call carries out a period of time, second user terminal is cut from IMS domain
CS domains are changed to, because EVS holotypes are not supported in CS domains, therefore second user terminal begins to use AMR-WB code encoding/decoding modes to enter
Row coding, and AMR-WB coded systems and EVS holotypes are two kinds of incompatible coded systems.It is if that is, not right
Media data is changed, even if there is media changer devices, can not be carried out between the first user terminal and second user terminal
Proper communication, at this time, media changer devices should be operated in and a kind of can change the media data received from transmitting terminal
Under the pattern that can be identified into receiving terminal, here it is transcoding mode of operation.
Media changer devices need to use transcoding resource under transcoding pattern, and transcoding resource can be by media changer devices control
Device processed applies for that in this manner, when media changer devices do not need transcoding resource, transcoding provides when needing
Source can use for other equipment, it is possible to increase the utilization rate of resource.Among another way, transcoding resource can also be pre-
First to file, work simply is not involved in the case where exempting from transcoding mode of operation, when media changer devices need transcoding resource,
Transcoding resource can be directly operated, without the flow for undergoing application again, it is possible to increase efficiency.
It should be appreciated that what is introduced in above-mentioned flow is when media changer devices control device gets the first media number
The situation incompatible with the media data that second user terminal uses according to the coded system of the first media data is confirmed afterwards, but
Beyond all doubt, the coded system for the first media data that media changer devices control device is got may also be used with second
Second coded system used in the terminal of family is compatible, compatible coded system identical situation used including the two mentioned here
With some other compatible situations, i.e. the first coded system and the second coded system simultaneously differ, but the two can mutually know each other
Other situation, for example, the first coded system is with the compatibility mode that any one in the second coded system is EVS, another one
AMR-WB modes.Just more not very enumerated for the first coded system and the second coded system identical situation, for example, the two
All be EVS holotypes, the two be all EVS compatibility modes or the two be all AMR-WB code encoding/decoding modes ... etc..
When media changer devices control device determine the first coded system corresponding to its first media data got with
During the second coded system compatibility that second user terminal uses, it directly controls media changer devices to be operated in exempt from transcoding pattern
Under, do not use transcoding resource to participate in the interworking of media data between the first user terminal and second user terminal.
The media changer devices control method that the present embodiment provides, in communication process, controlled and filled by media changer devices
The first media data for obtaining the first user terminal from medium surface and being sent to second user terminal is put, is then obtained according to medium surface
To media data determine whether is the media data encoding mode that is used between current first user terminal and second user terminal
Compatibility, when it is determined that the two is incompatible, media changer devices can be controlled to be operated under transcoding mode of operation, provided by transcoding
Source recompiles the media data of interaction between the first user terminal and second user terminal according to the coded system of receiving terminal,
The fast quick-recovery of call allowed between the first user terminal and second user terminal, reduce because the first user terminal and second is used
The influence that family terminal room coded system is incompatible and causes the situation of dropped calls to bring user.Pass through control in the prior art
The control message in face processed controls the first user terminal switching coding mode either to control matchmaker by the control message of chain of command
The way of body conversion equipment switching working mode, the duration of dropped calls can be largely reduced, improve Consumer's Experience.
Embodiment two
The present embodiment provides a kind of media changer devices control method, and on the basis of embodiment one, the present embodiment proposes
Media changer devices control method will make some improvement：
Although the media changer devices control method that the present embodiment one provides is in the first user terminal and second user terminal
Coded system it is incompatible when can be cut according to work of the first media data of medium surface to media changer devices
Change, but the first user terminal and second user terminal need that by the transcoding of media changer devices positive normal open could be realized for a long time
Letter, and transcoding resource needs to take some time when transcoding is carried out to media data, that is to say, that transcoding can lengthen
The delay of sound between both call sides.Delay is longer, and Consumer's Experience is also poorer, if had always a demand for by media changer devices work
Make to realize call under transcoding pattern, then both call sides just need to endure this delay for a long time.
On the other hand, in normal voice call, both call sides hear that the sound of other side gathers indeed through terminal
The coded format supported after voice signal according still further to terminal is encoded, and then sends call opposite end, the terminal for opposite end of conversing
Receive the data that coding is formed to be decoded according to corresponding decoding process afterwards, then pass through the audio output interface of terminal
Output forms voice signal.Voice data is inevitably lossy during encoding and decoding, still more works as media conversion
When equipment is operated under transcoding pattern, media data will undergo encoding-decoding process twice.Therefore, when the first user terminal and
When coded system between two user terminals is incompatible, call tone quality may be reduced to a certain extent, influences speech quality.
In this case, in order to improve call tone quality, the coded system of the two can be tuned into compatibility, avoid setting in media conversion
Standby second of coding of middle progress.This process can be realized by the control message of chain of command：
, can while being switched by the first media data that medium surface is got to the mode of operation of media changer devices
To send control message towards the first user terminal by control, the first user terminal is allowed by its coding mode by control message
Switch to it is compatible with second user terminal current coding mode, for example, second user terminal it is currently used AMR-WB coding
Mode, then the first user terminal coding mode can be switched into EVS compatibility modes after control message is received because
EVS compatibility modes support all 9 kinds of speed of AMR-WB encoding and decoding, and keep bit stream simultaneous with existing AMR-WB encoders
Hold.Therefore, EVS encoding and decoding and during AMR-WB encoding and decoding intercommunications, if using compatibility mode, only need to carry out message envelope
Fill the conversion of form, it is not necessary to which transcoding resource carries out the conversion of media formats, can avoid damage of the transcoding to voice quality, subtract
The time delay of few Media Stream, greatly improves voice quality and Consumer's Experience.
When the first user terminal receives control message, and switch to EVS compatible its coding mode according to control message
After pattern, the coded system of its first media data sent has reformed into EVS compatibility modes, therefore, works as media conversion
Plant control unit gets the first media data of the first user terminal transmission, and determines the first coded system and second user
During the second coded system compatibility that terminal uses, media changer devices control device can control media changer devices to be operated in again
Exempt under transcoding pattern.At this time, media changer devices only need second sent to the first media data and second user terminal
The operation that media data is Resealed.
Media changer devices control method provided in an embodiment of the present invention, it can not only be used in the first user terminal and second
When coded system between the terminal of family differs, the very first time switches according to the coded system of the media data of medium surface first
The mode of operation of media changer devices, ensure the fast quick-recovery of call between the first user terminal and second user terminal, and
Also by chain of command message the first user terminal can be controlled to switch the coded system of oneself simultaneously, avoided due to the first user terminal
It is bad dependent on long-term conversation delay, call tone quality caused by the transcoding of media changer devices for a long time with second user terminal
Problem.
Embodiment three：
The present embodiment provides a kind of media changer devices control device, and the media in the present embodiment are turned with reference to Fig. 4
Exchange device control device is introduced：
Media changer devices control device 40 includes acquisition module 402 and control module 404.Acquisition module 402 is used to obtain
The first user terminal is taken to be sent to the first media data of second user terminal by media changer devices.Control module 404 is used
It is mutual not in the first coded system when the first media data of determination and the second coded system used in the second user terminal
When compatible, control media changer devices are operated under transcoding pattern.
For SRVCC scenes, some introductions are above being done, those skilled in the art should be it will be appreciated that SRVCC
In scene, on medium surface, the first user terminal is that media data directly is sent into media changer devices, that is to say, that
Under SRVCC scenes, the carrying path of medium surface should be " the first user terminal<--->Media changer devices<--->Second uses
Family terminal " is so in such a scenario, acquisition module 402 can directly obtain the first user terminal and be sent to media changer devices
The first media data.
And eSRVCC is on the basis of SRVCC, ATCF is added, as SCC AS preposition network element, SCC AS is substituted and makees
For signaling plane anchor point, and the ATGW (Access Transfer Gateway, the biographies that also have as medium surface anchor point of ATCF together
Pass and access gateway), when the first user terminal and second user terminal carry out media data interaction using identical coded system
When, for example, due to EVS holotypes coded system can extended audio bandwidth, it provides ultra wide band and full band encodes, together
When also improve the voice quality that arrowband and broadband provide, so EVS holotypes can be used in first terminal and second terminal
When, typically using EVS holotypes.So in this case, the carrying path of medium surface is " the first user terminal
<--->ATGW<--->Second user terminal ".In such a scenario, the media between the first user terminal and second user terminal
Data will necessarily pass through ATGW, and for the first user terminal, the coded format of its media data between ATGW is
It is determined that so, no matter how the coded system of second user terminal switches, and the first user terminal all the time will not be by second user
The influence of terminal.Therefore, when between the first user terminal and second user terminal under eSRVCC scenes, if second user is whole
Held CS domains, no longer supported EVS holotypes coding, AMR-WB coding modes can only be used, then itself and the first user terminal it
Between medium surface carrying path can be changed into " the first user terminal<--->ATGW<--->Media changer devices<--->Second user
Terminal ", at this moment, the first media data that acquisition module 402 obtains no longer are directed to the first user terminal, because first uses
Family terminal sends it to WMG by ATGW again after the first media data can be sent to ATGW.
On the basis of the above, its coded system is switched to by the user terminal of chain of command message informing first in the prior art
So that among the way for fast quick-recovery of conversing, the control message of chain of command does not have to be delivered at the first user terminal, but transmits
To ATCF corresponding with ATGW, ATGW is notified to change its coded system after control message is received by ATCF, so as to
Realize the call recovery with second user terminal room.This can shorten the duration of dropped calls to a certain extent, but this
According further to chain of command message come what is be controlled, the time of generation to the transmission of chain of command control message still exists mode,
Only transmission time is somewhat shorter.The control method of the media changer devices provided according to the present embodiment, at this time,
Media changer devices control device can get the first matchmaker that the first user terminal is sent to media changer devices by ATGW
Volume data.
Control module 404 determines the first coded system of the first media data and the second volume used in second user terminal
Code mode is incompatible.
In the present embodiment, coded system --- the second coded system that the first media data uses with second user terminal
Incompatible situation refers to incompatible second coded system of the first coded system, and the second coded system also incompatible first encodes
Mode, typical several incompatible situations include：Any one party uses in first user terminal and second user terminal
The holotype of enhanced voice call service encoding and decoding, i.e. EVS Primary patterns, the opposing party use EVS compatibility modes；
Any one either in the first coded system and the second coded system is EVS Primary patterns, and the opposing party is broadband
Self-adaption multi-speed encoding/decoding mode, i.e. AMR-WB patterns.
Under SRVCC and eSRVCC scene, when the first user terminal or second user terminal are from IMS domain switching value CS
Domain, the most frequently used replacement coded system are exactly AMR-WB modes, and AMR-WB encoding and decoding are 3GPP (3rd Generation
Partnership Project, third generation partner program) the broadband multi-rate speech encoding and decoding for 3G network that define
Algorithm, it handles a width of 50Hz~7000Hz of voice spectrum band, is one of now widely used high definition encoding and decoding.
Some introductions above had been carried out to the transcoding mode of operation of media changer devices, under transcoding mode of operation,
Media changer devices can use transcoding resource to use the media data interacted between the first user terminal and second terminal
The coded system of data receiver is recompiled, i.e., the first user terminal is sent to the media data of second user terminal
The coded system currently supported according to second user terminal is sent to second user terminal after being recompiled, likewise,
The media data that second user terminal can be also sent to the first user terminal in other words may be used according to the first user terminal is recognizable
The coded system of support recompiles.For example, among an example, the first user terminal and second user terminal all use
EVS holotypes are encoded to media data, but after call carries out a period of time, second user terminal is cut from IMS domain
CS domains are changed to, because EVS holotypes are not supported in CS domains, therefore second user terminal begins to use AMR-WB code encoding/decoding modes to enter
Row coding, and AMR-WB coded systems and EVS holotypes are two kinds of incompatible coded systems.It is if that is, not right
Media data is changed, even if there is media changer devices, can not be carried out between the first user terminal and second user terminal
Proper communication, at this time, control module 404 can only control media changer devices to be operated in one kind and will can be received from transmitting terminal
Media data be converted under the pattern that receiving terminal can identify, here it is transcoding mode of operation.
Media changer devices are needed to use transcoding resource under transcoding pattern, and transcoding resource can be existed by control module 404
Apply when needs, in this manner, when media changer devices do not need transcoding resource, transcoding resource can be for
Other equipment uses, it is possible to increase the utilization rate of resource.Among another way, transcoding resource can also by pre- first to file,
Work simply is not involved in the case where exempting from transcoding mode of operation, when media changer devices need transcoding resource, transcoding money
Source can be directly operated, without the flow for undergoing application again, it is possible to increase efficiency.
It should be appreciated that what is introduced in above-mentioned flow is true after acquisition module 402 gets the first media data
Recognize the incompatible situation of media data that the coded system of the first media data and second user terminal use, but it is beyond all doubt
, the coded system of the first media data that acquisition module 402 is got may also with second user terminal used in
Two coded systems are compatible, the compatible coded system identical situation that the two uses and some other compatible of including mentioned here
Situation, i.e. the first coded system and the second coded system simultaneously differ, but the two situation about can identify mutually, for example,
One coded system and the compatibility mode that any one in the second coded system is EVS, another one is AMR-WB modes.For
One coded system just more not very enumerates with the second coded system identical situation, for example, the two is all EVS holotypes, two
Person be all EVS compatibility modes or the two be all AMR-WB code encoding/decoding modes ... etc..
When control module 404 determines that the first coded system corresponding to its first media data got and second user are whole
When holding the second coded system compatibility used, it directly controls media changer devices to be operated in exempt under transcoding pattern, does not use and turns
Code resource participates in the interworking of media data between the first user terminal and second user terminal.
The media changer devices control device 40 that the present embodiment provides, in communication process, by acquisition module 402 from media
Face obtains the first media data that the first user terminal is sent to second user terminal, and then control module 404 is according to medium surface
The media data got determines the media data encoding mode used between current first user terminal and second user terminal
It is whether compatible, when it is determined that the two is incompatible, media changer devices can be controlled to be operated under transcoding mode of operation, by turning
Code resource is by the media data of interaction between the first user terminal and second user terminal according to the compatible coded system of receiving terminal
Recompile, the fast quick-recovery of the call allowed between the first user terminal and second user terminal, reduce because the first user is whole
The influence that end is incompatible with second user terminal room coded system and causes the situation of dropped calls to bring user.With existing skill
The first user terminal is controlled to switch coding mode either by the control of chain of command by the control message of chain of command in art
Message controls the way of media changer devices switching working mode, can largely reduce the duration of dropped calls, carry
High Consumer's Experience.
Example IV
The present embodiment provides another media changer devices control device, as shown in Figure 5：
Media changer devices control device 40 is in addition to including acquisition module 402 and control module 404, in addition to sends
Module 406.
Although in the media changer devices control device 40 that the present embodiment two provides, in the first user terminal and second user
When the coded system of terminal is incompatible, control module 404 can be according to the first media data of medium surface to media conversion
The work of equipment switches over, but the first user terminal and second user terminal need to turn by media changer devices for a long time
Code could realize proper communication, and transcoding resource needs to take some time when transcoding is carried out to media data,
That is transcoding can lengthen the delay of sound between both call sides.Delay is longer, and Consumer's Experience is also poorer, if had always a demand for
Transcoding pattern is operated in by media changer devices to get off to realize call, then both call sides just need to endure this prolong for a long time
When.
On the other hand, in normal voice call, both call sides hear that the sound of other side gathers indeed through terminal
The coded format supported after voice signal according still further to terminal is encoded, and then sends call opposite end, the terminal for opposite end of conversing
Receive the data that coding is formed to be decoded according to corresponding decoding process afterwards, then pass through the audio output interface of terminal
Output forms voice signal.Voice data is inevitably lossy during encoding and decoding, still more works as media conversion
When equipment is operated under transcoding pattern, media data will undergo encoding-decoding process twice.Therefore, when the first user terminal and
When coded system between two user terminals is incompatible, call tone quality may be reduced to a certain extent, influences speech quality.
In this case, in order to improve call tone quality, the coded system of the two can be tuned into compatibility, avoid setting in media conversion
Standby second of coding of middle progress.What this process can be sent by sending module 406 by controlling towards the first user terminal
Control message is realized：
In the first media data that acquisition module 402 is got by medium surface, control module 404 is to media changer devices
Mode of operation switching while, sending module 406 can by control towards the first user terminal send control message, pass through
Control message allows the first user terminal that its coding mode is switched to, example compatible with second user terminal current coding mode
Such as, the currently used AMR-WB coded systems of second user terminal, then the first user terminal can receive control message it
Coding mode is switched into EVS compatibility modes afterwards, because EVS compatibility modes support all 9 kinds of speed of AMR-WB encoding and decoding, and
Keep bit stream compatible with existing AMR-WB encoders.Therefore, EVS encoding and decoding and during AMR-WB encoding and decoding intercommunications, if adopted
It is compatibility mode, then only needs to carry out the conversion of message encapsulation format, it is not necessary to which transcoding resource carries out turning for media formats
Change, damage of the transcoding to voice quality can be avoided, the time delay of Media Stream is reduced, greatly improve voice quality and Consumer's Experience.
When the first user terminal receives control message, and switch to EVS compatible its coding mode according to control message
After pattern, the coded system of its first media data sent has reformed into EVS compatibility modes, therefore, works as acquisition module
402 get the first media data of the first user terminal transmission, and control module 404 determines that the first coded system is used with second
During the second coded system compatibility that family terminal uses, control module 404 can control media changer devices to be operated in exempt from transcoding again
Under pattern.At this time, media changer devices only need the second media number sent to the first media data and second user terminal
According to the operation Resealed.
Media changer devices control device provided in an embodiment of the present invention, it can not only be used in the first user terminal and second
When coded system between the terminal of family differs, the very first time switches according to the coded system of the media data of medium surface first
The mode of operation of media changer devices, ensure the fast quick-recovery of call between the first user terminal and second user terminal, and
Also by chain of command message the first user terminal can be controlled to switch the coded system of oneself simultaneously, avoided due to the first user terminal
It is bad dependent on long-term conversation delay, call tone quality caused by the transcoding of media changer devices for a long time with second user terminal
Problem.
Embodiment five：
Described media changer devices can be WMG in above-described embodiment, what embodiment three and example IV provided
Media changer devices control device 40 is deployed in outside the WMG, such as media changer devices control device 40 is deployed in
On server beyond WMG, the present embodiment provides a kind of server, refer to Fig. 6, and Fig. 6 is each reality of the realization present invention
The structural representation of the optional server of example one is applied, the server comprises at least：Input and output (IO) bus 61, processor
62nd, memory 63, internal memory 64 and communicator 65.Wherein,
Input and output (IO) bus 61 respectively with itself belonging to server other parts (processor 62, memory 63,
Internal memory 64 and communicator 65) connection, and provide transmission lines for other parts.
Processor 62 generally controls the overall operation of the server belonging to itself.For example, processor 62 perform calculate and really
The operation such as recognize.Wherein, processor 62 can be central processing unit (CPU).
Communicator 65, generally includes one or more assemblies, and it allows the server and radio communication system belonging to itself
Radio communication between system or network.
Memory 63 stores the software code that processor is readable, processor is executable, and it, which is included, is used for control processor 62
Perform the instruction (i.e. software perform function) of functions described herein.
The function of acquisition module 402 and sending module 406 can pass through server in media changer devices control device 40
Communicator 65 realize that and the effect of control module 404 can then be realized by processor 62.Communicator 65 obtains the
One user terminal is sent to the first media data of second user terminal by WMG.Then the first media data is passed through
Input and output (IO) bus 61 is sent to processor 62, and processor 62 is carried out to the first coded system corresponding to the first media data
Analysis, determines whether the first coded system and the second coded system that second user terminal uses are compatible, if it is, processing
The control WMG of device 62, which is operated in, exempts under transcoding mode of operation；, whereas if incompatible, then processor 62 controls WMG
It is operated under transcoding pattern.Simultaneous processor 62 controls communicator 65 to disappear by control towards the transmission control of the first user terminal
Breath, the first user terminal of control, which switches to its coding mode, to carry out compatible mode with the second coding mode.Work as communication
Device 65 is got after the first user terminal switch operating crosses after pattern the first media data sent, and processor 62 will control
The mode of operation of WMG is to exempt from transcoding pattern from transcoding pattern switching.
In addition, the present embodiment also provides a kind of WMG, the WMG includes above-mentioned media changer devices control dress
Put 40, that is to say, that media changer devices control device 40 is deployed on the WMG.Such as Fig. 7, Fig. 7 is WMG
70 hardware architecture diagram, WMG 70 include Call Control Unit (Call Control Module, CCM) 701, report
Literary processing unit (Media Packet Processing Resource, MPPR) 702 and transcoding units 703.
Message process unit 702 can receive the first user terminal (being then ATGW if under eSRVCC scenes) transmission
To the first media data of second user terminal, then the first media data is decapsulated.Message process unit 702 is right
After first media data is decapsulated, it can primarily determine that the first coded system corresponding to the first media data is used with second
Whether the second coded system that family terminal uses is compatible, if not Call Control Unit 701 is then reported, by Call Control Unit
701 determine whether the first coded system is compatible with the second coded system, if transcoding units 703 to be operated：
If the first coded system is compatible with the second coded system, Call Control Unit 701 controls message process unit
702 are packaged to media data again, and encapsulation is transmitted directly to second user terminal after completing, and does not need transcoding units
703 participate in work；
If incompatible, control transcoding units 703 are to the media data solution after the decapsulation of message process unit 702
Code, and recompiled according to the compatible coded system of second user terminal, message process unit 702 is then transferred to according to second
The recognizable packaged type of user terminal is sent after Resealing.In addition, control transcoding list in Call Control Unit 701
While member 703, chain of command, which can send control message, allows the first user terminal to change its coded system, when the first user terminal changes
Become after coded system, after message process unit 702 decapsulates to the media data currently got, it is determined that current first compiles
Code mode is identical with the second coded system, therefore media data can not be passed to transcoding units 703, but is carried out by itself
Second user terminal is sent to after Resealing.
WMG provided in an embodiment of the present invention, can not only be between the first user terminal and second user terminal
When coded system differs, the very first time is according to the coded system switching media conversion equipment of the media data of medium surface first
Mode of operation, ensure the fast quick-recovery of call between the first user terminal and second user terminal, but also can pass through simultaneously
Chain of command message controls the first user terminal to switch the coded system of oneself, avoids because the first user terminal and second user are whole
End for a long time dependent on long-term conversation delay caused by the transcoding of media changer devices, call tone quality is bad the problem of.
Obviously, those skilled in the art should be understood that each module of the embodiments of the present invention or each step can be used
General computing device realizes that they can be concentrated on single computing device, or be distributed in multiple computing device institutes
On the network of composition, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to by they
It is stored in computer-readable storage medium (ROM/RAM, magnetic disc, CD) and is performed by computing device, and in some cases, can
With to perform shown or described step different from order herein, or they are fabricated to each integrated circuit die respectively
Block, or the multiple modules or step in them are fabricated to single integrated circuit module to realize.So the present invention does not limit
Combined in any specific hardware and software.
Above content is to combine the further description that specific embodiment is made to the embodiment of the present invention, it is impossible to is recognized
The specific implementation of the fixed present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Without departing from the inventive concept of the premise, some simple deduction or replace can also be made, should all be considered as belonging to the present invention
Protection domain.
Claims (12)
1. a kind of media changer devices control method, including：
Obtain the first media data that the first user terminal is sent to second user terminal by media changer devices；
When it is determined that the first coded system and the second coding staff used in the second user terminal of first media data
When formula is incompatible, the media changer devices are controlled to be operated under transcoding pattern；Under the transcoding pattern, the media turn
Exchange device is used using transcoding resource to the media data interacted between first user terminal and the second terminal
The coded system of data receiver is recompiled.
2. media changer devices control method as claimed in claim 1, it is characterised in that also include：
When it is determined that the first coded system of first media data is compatible with the second coded system, the media conversion is controlled
Equipment, which is operated in, to be exempted under transcoding pattern；Under the transcoding pattern, the media changer devices are without using transcoding resource to described
The media data interacted between first user terminal and the second user terminal recompiles.
3. media changer devices control method as claimed in claim 2, it is characterised in that first coded system with it is described
The compatible situation of second coded system comprises at least：
First coded system is identical with second coded system；
Or,
First coded system is enhanced voice call service encoding and decoding with any one in second coded system
Compatibility mode, another one is wideband adaptive multi-speed encoding/decoding mode.
4. media changer devices control method as claimed in claim 1, it is characterised in that the first of first media data
The coded system situation incompatible with the second coded system used in the second user terminal comprises at least：
First coded system is enhanced voice call service encoding and decoding with any one in second coded system
Holotype, the compatibility mode of the enhanced voice call service encoding and decoding of another one；
Or,
First coded system is enhanced voice call service encoding and decoding with any one in second coded system
Holotype, another one is wideband adaptive multi-speed encoding/decoding mode.
5. media intercommunication media changer devices control method as claimed in claim 1, it is characterised in that described to obtain the first use
Family terminal includes by way of media changer devices are sent to the first media data of second user terminal：
Obtain the first media data that the first user terminal is transmitted directly to the media changer devices；
Or,
First user terminal is obtained by transmitting the first media data for accessing gateway and being sent to the media changer devices.
6. the media changer devices control method as described in claim any one of 1-5, it is characterised in that also include：
Control message is sent towards first user terminal by control, the control message is used to indicate first user
Terminal switches to its coded system the coded system compatible with second coded system.
7. media changer devices control method as claimed in claim 6, it is characterised in that it is described by control towards described the
One user terminal also includes after sending control message：
It is determined that the first coded system is compatible with second coded system used in the first media data got；
Control the media changer devices to be operated in exempt under transcoding pattern；Under the transcoding pattern, the media changer devices
The media data interacted between first user terminal and the second user terminal is recompiled without using transcoding resource.
A kind of 8. media changer devices control device, it is characterised in that including：
Acquisition module, the first media of second user terminal are sent to by media changer devices for the first user terminal of acquisition
Data；
Control module, for being used when the first coded system for determining first media data with the second user terminal
The second coded system it is incompatible when, control the media changer devices to be operated under transcoding pattern；In the transcoding pattern
Under, the media changer devices are using transcoding resource to interacting between first user terminal and the second terminal
Media data is recompiled using the coded system of data receiver.
9. media changer devices control device as claimed in claim 8, it is characterised in that the control module is additionally operable to when true
When first coded system of fixed first media data is compatible with the second coded system, the media changer devices are controlled to work
In the case where exempting from transcoding pattern；Under the transcoding pattern, the media changer devices are without using transcoding resource to first user
The media data interacted between terminal and the second user terminal recompiles.
10. media changer devices control device as claimed in claim 8 or 9, it is characterised in that also including sending module, use
In sending control message towards first user terminal by control, the control message is used to indicate that first user is whole
End switches to its coded system the coded system compatible with second coded system.
11. media changer devices control device as claimed in claim 10, it is characterised in that the control module is additionally operable to really
Surely the first coded system is compatible with second coded system used in the first media data got, and controls the matchmaker
Body conversion equipment, which is operated in, exempts under transcoding pattern；Under the transcoding pattern, the media changer devices are without using transcoding resource
The media data interacted between first user terminal and the second user terminal is recompiled.
12. a kind of WMG, it is characterised in that including the media conversion conversion equipment as described in claim any one of 8-11
Control device.
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