CN106817351A

CN106817351A - A kind of method and device of media negotiation

Info

Publication number: CN106817351A
Application number: CN201510862794.7A
Authority: CN
Inventors: 吴鹏程
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2015-12-01
Filing date: 2015-12-01
Publication date: 2017-06-09

Abstract

The invention discloses a kind of method and device of media negotiation, it is used to reduce packet loss phenomenon during media communication, it is ensured that the normal transmission of the media file such as video, audio, and then lifts Consumer's Experience.A kind of method of media negotiation that the present invention is provided includes：Called subscriber equipment UE obtains the Session Description Protocol SDP message that network transmission parameter and calling UE send；The called UE according to the network transmission parameter and the SDP message, it is determined that the media coding format used when carrying out media communication with the calling UE；The media coding format is sent to the calling UE by the called UE, by the calling UE according to the media coding format, completes media consultation process.

Description

A kind of method and device of media negotiation

Technical field

The present invention relates to communication technical field, more particularly to a kind of method and device of media negotiation.

Background technology

Media negotiation through IP multimedia subsystem (IP Multimedia Subsystem, IMS) business, Calling subscriber equipment (User Equipment, UE), by media negotiation, determines one kind with called UE The media coding format that both sides support, so as to carry out the transmission of media information according to the media coding format, Realize the presentation of image, sound etc..

In the prior art, calling UE and called UE be when media negotiation is carried out, to media coding format Selection is random.For different media coding formats, its feature is different, for example：H264 is compiled The compression ratio of code form is high compared with H263 coded formats, thus the bandwidth phase needed during for media information To smaller；Packet before and after G723 coded formats are corresponding in frame has stronger dependence, if losing Wherein any one packet, the prediction in the encoding mechanism will be caused to complete etc..For participating in matchmaker For the network element of body information transfer, it is responsible for the information that forwarding calling UE and called UE send, not Participate in media negotiation.So as to whether calling UE and called UE cannot have passed through during awareness information transmission Air interface transmission or wire transmission or WIFI transmission, cannot also know the network transmission of transmission link Situations such as quality.For different transmission links, the packet loss of its any link is too high or bandwidth cannot When satisfaction is required, the phenomenons such as picture interim card, audio distortions are easily caused.

In sum, using existing media consulation method carry out media between communicate when, easily cause packet loss show As, and then influence the normal output of video, audio etc..

The content of the invention

A kind of method and device of media negotiation is the embodiment of the invention provides, when being used to reduce media communication Packet loss phenomenon, it is ensured that the normal transmission of the media file such as video, audio, and then lift Consumer's Experience.

A kind of method of media negotiation provided in an embodiment of the present invention, including：

Called subscriber equipment UE obtains the Session Description Protocol that network transmission parameter and calling UE send (Session Description Protocol, SDP) message；

The called UE according to the network transmission parameter and the SDP message, it is determined that with the caller UE carries out the media coding format used during media communication；

The media coding format is sent to the calling UE by the called UE, by the calling UE According to the media coding format, the media consultation process is completed.

The embodiment of the present invention, called UE would know that network transmission link by obtaining network transmission parameter Network quality situation, by obtaining the Session Description Protocol SDP message that calling UE sends, can be from SDP The media coding format that calling UE is supported is known in message, and then according to network transmission parameter and calling UE The media coding format of support, it is determined that the media coding format used when carrying out media communication with calling UE. Namely in the case where the network quality of network transmission link is considered, called UE sends from calling UE Found out in SDP message and more conform to the media coding format that actual calling UE and called UE are supported, And then the media coding format is sent to calling UE is confirmed, it is finally completed media consultation process.It is special Not, in converged communication, various different communications links may be related to, by using the present invention The media consulation method that embodiment is provided, media both sides can negotiate optimal according to actual transmissions link condition Result, so as to greatly reduce packet loss phenomenon during media communication, reduce due to packet loss cause decoding lose The phenomenons such as the flower screen, blank screen, the voice interim card that lose and produce, it is ensured that the media file such as video, audio is just Often transmission, and then improve Consumer's Experience.

It is preferred that the called UE obtains the SDP message that network transmission parameter and calling UE send, Specifically include：

The called UE receive session initiation protocol that network side sends (Session Initiation Protocol, SIP) signaling message；

The called UE obtains the network transmission parameter and the SDP from the SIP signaling messages Message.

It is preferred that the network transmission parameter includes one of following parameter or combination：

It is used to characterize losing for the packet drop in the transmission link between the calling UE and the called UE Bag rate；

The bandwidth of the transmission link；

The encryption level used when being encrypted to Media Stream of the transmission link requirement.

It is preferred that the called UE is according to the network transmission parameter and the SDP message, it is determined that with The calling UE carries out the media coding format used during media communication, specifically includes：

The called UE selects the media coding format that the called UE is supported from the SDP message；

The called UE according to the network transmission parameter, from the media coding lattice that the called UE is supported The media coding format used when carrying out media communication with the calling UE is determined in formula.

It is preferred that the called UE is according to the network transmission parameter, from the matchmaker that the called UE is supported The media coding format used when carrying out media communication with the calling UE is determined in body coded format, specifically Including：

Encryption level of the called UE in the network transmission parameter, supports from the called UE Media coding format in determine first kind media coding format；

Bandwidth of the called UE in the network transmission parameter, from the first kind media coding lattice Equations of The Second Kind media coding format is determined in formula；

Packet loss of the called UE in the network transmission parameter, from the Equations of The Second Kind media coding The media coding format used when carrying out media communication with the calling UE is determined in form.

It is preferred that the media coding format is sent to the calling UE by the called UE, specific bag Include：

The called UE carries in another SDP message the media coding format, will be described another SDP message is sent to the calling UE by response message.

Calling subscriber equipment UE obtains network transmission parameter and the media coding format that called UE sends；

The calling UE carries out legitimacy inspection according to the network transmission parameter to the media coding format Look into, it is determined that the media coding format used when carrying out media communication with the called UE；

The calling UE by it is described carry out media communication with the called UE when media coding format that uses The called UE is sent to, the media consultation process is completed.

The embodiment of the present invention, communication medium when media negotiation is carried out, with reference to the feelings of media information transmission link Condition negotiation draws optimal result, more conforms to actual conditions, can reduce packet loss phenomenon during media communication, Ensure the normal transmission of the media files such as video, audio, and then lift Consumer's Experience.

It is preferred that the calling subscriber equipment UE obtains network transmission parameter and the media that called UE sends Before coded format, the method also includes：The calling UE sends includes that the SIP signalings of SDP message disappear Cease to the called UE；

The calling subscriber equipment UE obtains network transmission parameter and the media coding format that called UE sends, Specifically include：The calling UE receives the response message that the called UE sends, from the response message It is middle to obtain the network transmission parameter and the SDP message, and obtain the media from the SDP message Coded format.

The bandwidth of the transmission link；

It is preferred that the media coding that the calling UE is used when described and called UE is carried out into media communication Form is sent to the called UE, specifically includes：

The media coding format that the calling UE is used when described and called UE is carried out into media communication is carried In SDP message, the SDP message is sent to the called UE by response ACK message.

A kind of method of media negotiation that present example is provided, including：

The network element for participating in the media information transmission between calling subscriber equipment UE and called UE receives SIP letters Make message；

Net of the network element according to the transmission link between the network element of this network element and the transmission SIP signaling messages Network transmission quality, determines network transmission parameter, and network transmission parameter carrying is disappeared in the SIP signalings Sent after in breath.

The embodiment of the present invention, the network element for participating in the media information transmission between calling UE and called UE will be used Carried in the SIP signalings in the network transmission parameter of the network transmission quality for characterizing media information transmission link In message, so as to may be such that calling UE and called UE when media negotiation is carried out, according to the network transmission Parameter determination media coding format, and then media communication is carried out using the media coding format, media can be reduced Packet loss phenomenon during communication, it is ensured that the normal transmission of the media file such as video, audio, and then lift user's body Test.

The bandwidth of the transmission link；

It is preferred that the net of media information transmission of the participation between calling subscriber equipment UE and called UE Network transmission matter of the unit according to the transmission link between Home Network unit and the network element for sending the SIP signaling messages Amount, determines network transmission parameter, and the network transmission parameter is carried into the rear hair in the SIP signaling messages Send, specifically include：

As the SIP that the network element of the media information transmission between the participation calling UE and called UE is received Signaling message is the media between the participation calling UE and called UE when being sent by the calling UE The network element of information transfer, according to the network transmission quality of the transmission link between this network element and the calling UE, Determine the network transmission parameter of the transmission link, and the network transmission parameter of the transmission link is carried described Sent after in SIP signaling messages；

Or, when the network element reception for participating in the media information transmission between calling UE and called UE The SIP signaling messages are by another net of the media information transmission between participation calling UE and called UE When unit sends, the network element of the media information transmission between the participation calling UE and called UE, according to this The network transmission quality of the transmission link between network element and another network element, determines the network of the transmission link In configured transmission, and the sip message that sends of network transmission parameter according to the link and another network element The network transmission parameter of carrying, is adjusted to the network transmission parameter in the SIP signaling messages, by institute State after the network transmission parameter after adjustment is carried in the SIP signaling messages and send.

It is preferred that the network element for participating in the media information transmission between calling UE and called UE is according to this Biography between another network element of the media information transmission between network element and the participation calling UE and called UE The network transmission carried in the network transmission parameter of transmission link, and the sip message of another network element transmission Parameter, is adjusted to the packet loss in the network transmission parameter in the SIP signaling messages, specifically includes：

The network element for participating in the media information transmission between calling UE and called UE, by this network element and institute The first packet loss in the network transmission parameter of the transmission link between another network element is stated, with another network element The second packet loss in the network transmission parameter carried in the sip message of transmission is contrasted, if described first Packet loss is higher than second packet loss, then losing in the network transmission parameter that will be carried in the sip message Bag rate is adjusted to first packet loss.

It is preferred that the network element for participating in the media information transmission between calling UE and called UE is according to this Biography between another network element of the media information transmission between network element and the participation calling UE and called UE The network transmission ginseng carried in the sip message that the network transmission parameter of transmission link and another network element send Number, is adjusted to the bandwidth in the network transmission parameter in the SIP signaling messages, specifically includes：

The network element for participating in the media information transmission between calling UE and called UE by this network element with it is described The first bandwidth in the network transmission parameter of the transmission link between another network element, sends with another network element Sip message in carry network transmission parameter in the second bandwidth contrasted, if first bandwidth is small Bandwidth adjustment in second bandwidth, the then network transmission parameter that will be carried in the sip message is institute State the first bandwidth.

It is preferred that the network element for participating in the media information transmission between calling UE and called UE is according to this Biography between another network element of the media information transmission between network element and the participation calling UE and called UE The network transmission ginseng carried in the sip message that the network transmission parameter of transmission link and another network element send Number, is adjusted to the encryption level in the network transmission parameter in the SIP signaling messages, specifically includes：

The network element for participating in the media information transmission between calling UE and called UE by this network element with it is described The first encryption level in the network transmission parameter of the transmission link between another network element, with another network element The second encryption level in the network transmission parameter carried in the sip message of transmission is contrasted, if described the One encryption level is higher than second encryption level, the then network transmission parameter that will be carried in the sip message In encryption level be adjusted to first encryption level.

A kind of device of media negotiation provided in an embodiment of the present invention, including：

Acquiring unit, for obtaining the Session Description Protocol SDP that network transmission parameter and calling UE send Message；

Determining unit, for according to the network transmission parameter and the SDP message, it is determined that with it is described Calling UE carries out the media coding format used during media communication；

Transmitting element, for the media coding format to be sent into the calling UE, by the calling UE According to the media coding format, the media consultation process is completed.

It is preferred that the acquiring unit specifically for：

Receive the session initiation protocol SIP signaling messages that network side sends；

The network transmission parameter and the SDP message are obtained from the SIP signaling messages.

The bandwidth of the transmission link；

It is preferred that the determining unit specifically for：

The media coding format that the called UE is supported is selected from the SDP message；

According to the network transmission parameter, determine and institute in the media coding format supported from the called UE State the media coding format that calling UE used during media communication.

It is preferred that the determining unit is according to the network transmission parameter, from the matchmaker that the called UE is supported When the media coding format used when carrying out media communication with the calling UE is determined in body coded format, tool Body is used for：

According to the encryption level in the network transmission parameter, from the media coding lattice that the called UE is supported First kind media coding format is determined in formula；

According to the bandwidth in the network transmission parameter, second is determined from the first kind media coding format Class media coding format；

According to the packet loss in the network transmission parameter, from the Equations of The Second Kind media coding format determine with The calling UE carries out the media coding format used during media communication.

It is preferred that the transmitting element specifically for：

The media coding format is carried in another SDP message, another SDP message is passed through Response message is sent to the calling UE.

The device of another media negotiation provided in an embodiment of the present invention, including：

Acquiring unit, network transmission parameter and media coding format for obtaining called UE transmission；

Determining unit, for carrying out legitimacy inspection to the media coding format according to the network transmission parameter Look into, it is determined that the media coding format used when carrying out media communication with called UE；

Transmission unit, the media coding format used during for described and called UE to be carried out into media communication is sent out The called UE is given, the media consultation process is completed.

It is preferred that the transmission unit obtains the network transmission parameter that called UE sends in the acquiring unit And before media coding format, be additionally operable to：Transmission includes the conversation initial of Session Description Protocol SDP message Agreement SIP signaling messages give the called UE；

The acquiring unit specifically for：The response message that the called UE sends is received, from the response The network transmission parameter and the SDP message are obtained in message, and is obtained from the SDP message described Media coding format.

The bandwidth of the transmission link；

It is preferred that the transmission unit specifically for：

The media coding format used when described and called UE is carried out into media communication is carried assists in conversation description In view SDP message, the SDP message is sent to the called UE by response ACK message.

A kind of user equipment provided in an embodiment of the present invention, including above two media negotiation device.

The device of the third media negotiation provided in an embodiment of the present invention, including：

Receiving unit, for receiving session initiation protocol SIP signaling messages；

Transmitting element, for the link between the network element according to this network element and the transmission SIP signaling messages Network transmission quality, determines network transmission parameter, and the network transmission parameter is carried in the SIP signalings Sent after in message.

The bandwidth of the transmission link；

It is preferred that the transmitting element specifically for：

It is described when the SIP signaling messages that the receiving unit is received are when being sent by the calling UE Transmitting element according to the network transmission quality of the transmission link between the present apparatus and the calling UE, it is determined that should The network transmission parameter of link, and the network transmission parameter of the link is carried in the SIP signaling messages After send；

Or, when the SIP signaling messages that the receiving unit is received be by participation calling UE with it is called When another network element of the media information transmission between UE sends, the transmitting element according to the present apparatus with it is described The network transmission quality of the transmission link between another network element, determines the network transmission parameter of the link, and root According to the network transmission carried in the sip message that the network transmission parameter and another network element of the link send Parameter, is adjusted to the network transmission parameter in the SIP signaling messages, by the network after the adjustment Configured transmission sends after carrying in the SIP signaling messages.

It is preferred that the transmitting element is according between the present apparatus and the participation calling UE and called UE The network transmission parameter of the transmission link between another network element of media information transmission, and another network element The network transmission parameter carried in the sip message of transmission, to the network transmission ginseng in the SIP signaling messages When packet loss in number is adjusted, specifically for：

By the first packet loss in the network transmission parameter of the transmission link between the present apparatus and another network element Rate, the second packet loss in the network transmission parameter carried in the sip message sent with another network element enters Row contrast, if first packet loss is higher than second packet loss, by what is carried in the sip message Packet loss in network transmission parameter is adjusted to first packet loss.

It is preferred that the transmitting element is according between the present apparatus and the participation calling UE and called UE The network transmission parameter of the transmission link between another network element of media information transmission and another network element The network transmission parameter carried in the sip message of transmission, to the network transmission ginseng in the SIP signaling messages When bandwidth in number is adjusted, specifically for：

By the first bandwidth in the network transmission parameter of the transmission link between the present apparatus and another network element, It is right that the second bandwidth in the network transmission parameter carried in the sip message sent with another network element is carried out Than, if first bandwidth is less than second bandwidth, the network transmission that will be carried in the sip message Bandwidth adjustment in parameter is first bandwidth.

It is preferred that the transmitting element is according between the present apparatus and the participation calling UE and called UE The network transmission parameter of the transmission link between another network element of media information transmission and another network element The network transmission parameter carried in the sip message of transmission, to the network transmission ginseng in the SIP signaling messages When encryption level in number is adjusted, specifically for：

By the first encryption in the network transmission parameter of the transmission link between the present apparatus and another network element Rank, the second encryption stage in the network transmission parameter carried in the sip message sent with another network element Do not contrasted, if first encryption level is higher than second encryption level, by the sip message Encryption level in the network transmission parameter of middle carrying is adjusted to first encryption level.

Brief description of the drawings

In order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art, below will be to implementing The accompanying drawing to be used needed for example is briefly described, it should be apparent that, drawings in the following description are only Some embodiments of the present application, for those of ordinary skill in the art, are not paying creative work Under the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is that a kind of flow of the method for media negotiation in called UE side provided in an embodiment of the present invention is shown It is intended to；

Fig. 2 is that a kind of flow of the method for media negotiation in calling UE side provided in an embodiment of the present invention is shown It is intended to；

Fig. 3 is that a kind of flow of the method for media negotiation in network side provided in an embodiment of the present invention is illustrated Figure；

Fig. 4 is the call flow schematic diagram between a kind of calling UE provided in an embodiment of the present invention and called UE；

Fig. 5 is a kind of structural representation of media negotiation device in called UE side provided in an embodiment of the present invention Figure；

Fig. 6 is a kind of structural representation of media negotiation device in calling UE side provided in an embodiment of the present invention Figure；

Fig. 7 is a kind of structural representation of media negotiation device in network side provided in an embodiment of the present invention.

Specific embodiment

A kind of method and device of media negotiation is the embodiment of the invention provides, when being used to reduce media communication Packet loss phenomenon, it is ensured that the normal output of video, audio etc., and then lift Consumer's Experience.

In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing and reality Example is applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only Only it is used to explain the present invention, is not intended to limit the present invention.

In called UE side, referring to Fig. 1, a kind of method of media negotiation provided in an embodiment of the present invention, bag Include：

S101, called subscriber equipment UE obtain the conversation description that network transmission parameter and calling UE send Agreement SDP message；

S102, the called UE according to the network transmission parameter and the SDP message, it is determined that and institute State the media coding format that calling UE used during media communication；

The media coding format is sent to the calling UE by S103, the called UE, by the master Cry UE according to the media coding format, complete the media consultation process.

The called UE receives the SIP signaling messages that network side sends；

It is preferred that the SIP signaling messages for example can be calling INVITE.

That is, in the SIP signaling messages that called UE is received, carrying network transmission parameter and master The SDP message for making UE send.

Wherein, the SIP signaling messages that the network side sends, participated in specially in network side calling UE with The SIP signaling messages that the network element of the media information transmission between called UE sends.Also, the SIP signalings Message is to be sent to network side by calling UE.The media participated between calling UE and called UE Information transfer network element for example can be proxy call conversation control function entity (Proxy Call Session Control Function, P-CSCF), session-orient E-Service entity (Session Border Control, SBC) Can be the P-CSCF of calling UE side Deng, the P-CSCF, or the P-CSCF of called UE side.

Specifically, the SIP signaling messages that calling UE sends, first by directly being communicated with calling UE Participation calling UE and called UE between the network element of media information transmission receive, the network element receives SIP After message, the network quality situation according to the transmission link between this network element and calling UE determines the transmission The network transmission parameter of link, and network transmission parameter carrying is sent afterwards in the sip signalling message.This Afterwards, carry the SIP signaling messages of network transmission parameter often by one participate in calling UE and called UE it Between media information transmission network element, just by the network element according to the network quality of current media information transfer link Situation, determines the network transmission parameter of present transmission link, and join according to the network transmission of present transmission link Several network transmission parameters in the SIP signaling messages are adjusted, finally by directly being carried out with called UE The network element of the media information transmission between the participation calling UE and called UE of communication passes the network after adjustment Defeated parameter is carried and is sent to called UE in the sip signalling message.

The bandwidth of the transmission link；

The concrete numerical value to above-mentioned network transmission parameter is simply illustrated below.

For packet loss, for example, the packet loss 5% in this section of transmission link, then the parameter value is 5.

For bandwidth, its numerical value is determined by the specific amount of bandwidth of link, for example, in this section of transmission link Bandwidth value is 512Kbps, then the parameter value is 512K.

For encryption level, can preferably be divided into 6 grades：0,1,2,3,4,5.Wherein numerical value Higher, grade higher, and level of security is also higher, correspondingly, is sent between calling UE and called UE Media Stream be less susceptible to be ravesdropping.

It is preferred that above-mentioned network transmission parameter (Transmit-Parameter) can be set to the header field of sip message, After any network element receives the sip message for carrying network transmission parameter in network, disappeared by reading the SIP The header field of breath, just can obtain network transmission parameter.

It should be noted that called UE finally obtain network transmission parameter, be by network side adjust after, The worst situation of transmission quality in all transmission links between sign calling UE and called UE.For example, Transmission link between calling UE and called UE has three, respectively link A, link B, link C. For the packet loss in network transmission parameter, it is assumed that the value of the packet loss of link A is 5, the packet loss of link B The value of rate is 8, and the value of the packet loss of link C is 3, then the value of the packet loss that called UE is finally obtained is 8； For the bandwidth in network transmission parameter, it is assumed that a width of 512K of band of link A, the band of link B is a width of The a width of 517K of band of 520K, link C, the then bandwidth value that called UE is finally obtained is 512K；For net Encryption level in network configured transmission, it is assumed that the encryption level of link A is 0, the encryption level of link B is The band a width of 0 of 3, link C, the then encryption level that called UE is finally obtained is 3.

It is preferred that the SDP message that called UE sends according to network transmission parameter and calling UE, it is determined that The media coding format used when carrying out media communication with the calling UE, specifically includes：

Step A：The called UE selects the media that the called UE is supported from the SDP message Coded format；

Step B：The called UE according to the network transmission parameter, from the matchmaker that the called UE is supported The media coding format used when carrying out media communication with the calling UE is determined in body coded format.

That is, in the SDP message that calling UE sends, including the media coding that calling UE is supported Form so that, called UE obtain SDP message after, can according to the information content in SDP message, Select the media coding format of called UE support.It can be appreciated that the media coding lattice of called UE selection Formula is the media coding format that calling UE and called UE both sides support.Secondly, called UE is further According to the network transmission parameter, the media coding format to being selected in step A is screened, finally from The media coding format that middle determination is used when carrying out media communication with the calling UE.

Certainly, also including such as other informations such as medium type in above-mentioned SDP message, because SDP disappears Other information in breath is not the emphasis that the embodiment of the present invention is illustrated, does not make excessive introduction herein.

Lower mask body is introduced in above-mentioned steps B, called UE according to network transmission parameter, from called UE branch The media coding format used when carrying out media communication with the calling UE is determined in the media coding format held Process.It is preferred that the process is specifically included：

For example, generally, the value of encryption level is 0, is indicated without safety requirements.If the value is not 0, Then represent and encryption level is required, special media coding lattice can be selected accordingly based upon the value of encryption level Formula.

For example, bandwidth value is relatively low, then compression ratio media coding format higher is correspondingly selected.Also It is to say, the media coding format selected is, it is necessary to meet the limitation of bandwidth.

Such as, the compression ratio of H264 coded formats is higher than the compression ratio of H263 coded format, when bandwidth value compared with When low, H264 coded formats are can select.

For example, the value of the packet loss in the network transmission parameter that receives of called UE is higher, then illustrate in matchmaker Certain section of packet loss of link can be higher in body message transmitting procedure, in the case, frame select as far as possible before and after In packet contact untight media coding format.

Such as：For audio coding G711 (PCMA/PCMU), do not have between packet in its front and rear frame Contact, in the case where packet loss is high, may be selected the coded format；Compiled for G723, G729, AMR Code form, is related in its front and rear frame between packet, then this several class may be selected in the case where packet loss is low Coded format.

It is preferred that called UE by determination after the media coding used when carrying out media communication with calling UE Form is sent to calling UE, specifically includes：

Called UE carries in another SDP message the media coding format, and another SDP is disappeared Breath is sent to the calling UE by response message.

It is, after called UE receives the SIP signaling messages of calling UE transmission, from the SIP signalings After message obtains the SDP message that network transmission parameter and calling UE send, it is determined that being carried out with calling UE The media coding format used during media communication；Secondly, called UE replys response message to calling UE, And another SDP message is carried in the response message, the SDP message includes its own media selected Coded format.

In calling UE side, referring to Fig. 2, a kind of method of media negotiation provided in an embodiment of the present invention, bag Include：

S201, calling subscriber equipment UE obtain network transmission parameter and the media coding that called UE sends Form；

It is legal that S202, the calling UE are carried out according to the network transmission parameter to the media coding format Property check, it is determined that the media coding format used when carrying out media communication with the called UE；

S203, the calling UE by it is described carry out media communication with the called UE when media that use compile Code form is sent to the called UE, completes the media consultation process.

It is preferred that calling subscriber equipment UE obtains network transmission parameter and the media coding that called UE sends Before form, the method also includes：Calling UE sends includes the SIP signaling messages of SDP message to called UE；

Calling subscriber equipment UE obtains network transmission parameter and the media coding format that called UE sends, tool Body includes：Calling UE receives the response message that called UE sends, and network is obtained from the response message and is passed Defeated parameter and SDP message, and obtain the media coding format from the SDP message.

It is preferred that calling UE receives the response message that called UE sends, specifically include：

Calling UE receives the response message that network side sends, and the response message is that called UE is sent to network Side, and then calling UE is transmitted to by network side.

Wherein, the response message that network side described here sends, specially participates in calling UE in network side What the network element of the media information transmission between called UE sent.It is described to participate in calling UE and called UE Between media information transmission network element, for example can be for P-CSCF, SBC etc., the P-CSCF can Think the P-CSCF of calling UE side, or the P-CSCF of called UE side.

Also, forward called UE in the network element for participating in the media information transmission between calling UE and called UE During the response message of transmission, the every of media information transmission between calling UE and called UE is participated in One network element, need not again to the network transmission parameter of carrying in response message when the response message is received It is adjusted, this is because, when calling UE sends sip message to called UE, these participate in caller Each network element of the media information transmission between UE and called UE is adjusted to network transmission parameter It is whole.

The bandwidth of the transmission link；

During due to the media consulation method that called UE side is described above, to the network transmission parameter Introduced in detail, therefore not to repeat here.

It is preferred that in step S202, the matchmaker that calling UE sends according to network transmission parameter to called UE It is final to determine that both sides carry out the media coding format used during media communication after body coded format is examined. Wherein it is determined that media coding format can for one kind, or various, this is not limited by the present invention.

It is preferred that the media coding format that calling UE is used when described and called UE is carried out into media communication The called UE is sent to, is specifically included：

The media coding format that calling UE is used when described and called UE is carried out into media communication is carried and existed In SDP message, the SDP message is sent to the called UE by response ACK message.

So far, media consultation process terminates.Afterwards, calling UE and called UE are according to true in negotiation result Fixed media coding format, further carries out media communication.

In network side, referring to Fig. 3, a kind of method of media negotiation provided in an embodiment of the present invention, including：

The network element of the media information transmission between S301, participation calling subscriber equipment UE and called UE is received Session initiation protocol SIP signaling messages；

S302, the network element are according to the chain between the network element of this network element and the transmission SIP signaling messages The network transmission quality on road, determines network transmission parameter, and the network transmission parameter is carried in the SIP Sent after in signaling message.

Wherein, the network element of media information transmission between calling subscriber equipment UE and called UE is participated in for example Can be P-CSCF, SBC etc., the P-CSCF can be the P-CSCF of calling UE side, it is also possible to It is the P-CSCF of called UE side.Also, these are participated between calling subscriber equipment UE and called UE The network element of media information transmission comprising media forwarding module (or for Media proxy (Media Proxy, MP)), it is used to forward the VoP and/or video data bag sent between calling UE and called UE Deng.

The bandwidth of the transmission link；

It is preferred that the net of media information transmission of the participation between calling subscriber equipment UE and called UE Network transmission matter of the unit according to the transmission link between Home Network unit and the network element for sending the SIP signaling messages Amount, determines network transmission parameter, and the network transmission parameter is carried into the rear hair in the SIP signaling messages Send, specifically may include following two situations：

Situation one：As the SIP that the network element for participating in the media information transmission between calling UE and called UE is received Signaling message is when being sent by calling UE：

The network element of the media information transmission between calling UE and called UE is participated in, according to this network element and caller The network transmission quality of the transmission link between UE, determines the network transmission parameter of the transmission link, and will The network transmission parameter of the transmission link sends after carrying in the SIP signaling messages；

In this case, in the SIP signaling messages that calling UE sends, without carrying network transmission parameter, Accordingly, it would be desirable to receive UE transmission SIP signaling messages participation calling UE and called UE between The network element of media information transmission, according to the network transmission quality of transmission link, after determining network transmission parameter, The network transmission parameter is carried in the SIP signaling messages and sent.

Specifically, the network element of the media information transmission between above-mentioned participation calling UE and called UE is by network After configured transmission is carried in the SIP signaling messages, participation calling UE and called UE can be sent to Between media information transmission network element other network elements, be transmitted to called UE by other network elements.Certainly, If the network element directly can communicate with called UE, the network element is directly carried in the SIP network transmission parameter Called UE is sent to after in signaling message.

Situation two：When the network element of the media information transmission between the participation calling UE and called UE is received The SIP signaling messages be by the another of the media information transmission between participation calling UE and called UE When network element sends：

Participate in the network element of the media information transmission between calling UE and called UE, according to this network element with it is above-mentioned The network transmission quality of the transmission link between another network element, determines the network transmission parameter of the transmission link, And the network carried in the network transmission parameter and the sip message of another network element transmission according to the link Configured transmission, is adjusted, after the adjustment to the network transmission parameter in the SIP signaling messages Network transmission parameter sends after carrying in the SIP signaling messages.

That is, the SIP signaling messages that calling UE sends, between calling UE and called UE When being transmitted in transmission link, the SIP signaling messages are often participated between calling UE and called UE by one Media information transmission network element, the network transmission parameter in SIP signaling messages is adjusted by the network element just It is whole, passed by the media information between the participation calling UE and called UE that are directly communicated with called UE In the sip signalling message be sent to afterwards for network transmission parameter carrying after final adjustment called by defeated network element UE。

It is preferred that the network element for participating in the media information transmission between calling UE and called UE can pass network Defeated parameter (Transmit-Parameter) is set to the header field of sip message, so as to carry in SIP signaling messages In.

The setting of each parameter concrete numerical value in for network transmission parameter (Transmit-Parameter), It is exemplified below：

For encryption level, can preferably be divided into 6 grades：0,1,2,3,4,5.Wherein numerical value Higher, grade higher.

Specifically, the network element of the media information transmission between participation calling UE and called UE is to sip message In network transmission parameter adjustment process it is as follows：

It is preferred that participating in the network element of the media information transmission between calling UE and called UE according to this network element And the chain between another network element of the media information transmission between the participation calling UE and called UE The network transmission parameter carried in the network transmission parameter on road, and the sip message of another network element transmission, Packet loss in network transmission parameter in the SIP signaling messages is adjusted, is specifically included：

The network element of the media information transmission between calling UE and called UE is participated in, this network element is another with described The first packet loss in the network transmission parameter of the transmission link between one network element, sends with another network element Sip message in carry network transmission parameter in the second packet loss contrasted, if first packet loss Rate is higher than second packet loss, the then packet loss in the network transmission parameter that will be carried in the sip message It is adjusted to first packet loss.

Certainly, if first packet loss is less than second packet loss, not to carrying in sip message Packet loss in network transmission parameter is adjusted.

It is preferred that participating in the network element of the media information transmission between calling UE and called UE according to this network element And the chain between another network element of the media information transmission between the participation calling UE and called UE The network transmission parameter carried in the sip message that the network transmission parameter on road and another network element send, Bandwidth in network transmission parameter in the SIP signaling messages is adjusted, is specifically included：

The network element of the media information transmission between participation calling UE and called UE is another with described by this network element The first bandwidth in the network transmission parameter of the transmission link between network element, with another network element transmission The second bandwidth in the network transmission parameter carried in sip message is contrasted, if first bandwidth is less than Second bandwidth, then the Bandwidth adjustment in the network transmission parameter that will be carried in the sip message is described First bandwidth.

Certainly, if the first band is wider than second bandwidth, not to the network of carrying in sip message Bandwidth in configured transmission is adjusted.

It is preferred that participating in the network element of the media information transmission between calling UE and called UE according to this network element And the chain between another network element of the media information transmission between the participation calling UE and called UE The network transmission parameter carried in the sip message that the network transmission parameter on road and another network element send, Encryption level in network transmission parameter in the SIP signaling messages is adjusted, is specifically included：

The network element of the media information transmission between participation calling UE and called UE is another with described by this network element The first encryption level in the network transmission parameter of the transmission link between network element, sends with another network element Sip message in carry network transmission parameter in the second encryption level contrasted, if described first plus It is close to be superior to second encryption level, then in the network transmission parameter that will be carried in the sip message Encryption level is adjusted to first encryption level.

Certainly, if first encryption level is less than second encryption level, not to being taken in sip message Encryption level in the network transmission parameter of band is adjusted.

In addition, unless otherwise defined, the technical term or scientific terminology used in the embodiment of the present invention should The ordinary meaning understood by the personage with general technical ability in art of the present invention.Present patent application " first ", " second " and similar word used in specification and claims are not offered as appointing What order, quantity or importance, and be used only to distinguish different parts.

It is preferred that the network element of the media information transmission between calling subscriber equipment UE and called UE is participated in, It is sent to after network transmission parameter after adjustment is carried in the SIP signaling messages that the calling UE sends After called UE, the method also includes：

The response message that called UE is replied is received, and the response message is sent to calling UE, wherein The SDP message that the network transmission parameter and called UE of called UE reception send is carried in the response message. Also, comprising called UE according to network transmission parameter and caller in the SDP message that called UE sends The media coding used when carrying out media communication with calling UE that the media coding format that UE sends is determined Form.

A complete embodiment is given with reference to specific application scenarios.

The call flow that Fig. 4 is shown between a kind of calling UE provided in an embodiment of the present invention and called UE shows It is intended to.

Wherein, the network element for participating in the media information transmission between calling UE and called UE includes：Calling UE The P-CSCF entities of side and the P-CSCF entities of called UE side, also, calling UE side P-CSCF The P-CSCF entities of entity and called UE side include media forwarding module (MP).Service call session Controlled entity (Serving Call Session Control Function, S-CSCF) is forwarded due to no media Module (MP), therefore be only responsible for disappearing the calling INVITE that the P-CSCF entities of calling UE side send Breath is transmitted to the P-CSCF entities of called UE side, is not involved in adjusting the network transmission in INVITE The process of parameter.The process that media negotiation is carried out between calling UE and called UE is as follows：

Step 1：Calling UE sends calling INVITE, and SDP1 is carried in INVITE Message.

Wherein, above-mentioned INVITE is the one kind in SIP signaling messages, and the sequence number in SDP1 1 simply is used to distinguish the SDP message that hereinafter called UE sends, and does not represent other special implications. Also, include media coding format in SDP1 message, the media coding format is what calling UE was supported Media coding format.It should be evident that the media coding supported comprising various calling UEs in SDP1 message Form, after receiving the message to called UE, can therefrom select the media coding itself also supported Form.

Step 2:After the P-CSCF entities of calling UE side receive the INVITE of calling UE transmission, Notify that the media that the media forwarding module (MP) in the P-CSCF entities of Calling Side opens calling UE side turn Originator mouth；And the network transmission parameter of the transmission link between determination and calling UE, by the network transmission Parameter is sent to S-CSCF entities after carrying in INVITE.

Specifically, after the P-CSCF entities of calling UE side receive INVITE, it is determined that at this Without carrying media transport parameters (Transmit-Parameter), and then calling UE side in INVITE Transmission link of the P-CSCF entities according to itself and calling UE between network transmission quality, determine net Network configured transmission (including packet loss, bandwidth, encryption level), and using the network transmission parameter as this The header field of INVITE is carried in INVITE, will carry network transmission parameter afterwards INVITE is sent to S-CSCF entities.Certainly, the P-CSCF entities of calling UE side can also be pre- First determine the network transmission parameter, and the network transmission parameter is saved, when receiving calling UE After the INVITE of transmission, directly from locally obtaining the network transmission parameter, so as to by the network transmission Parameter sends after carrying in INVITE.

Situation one described in step correspondence media consulation method above to network side：Participate in caller The SIP signaling messages that the network element of the media information transmission between UE and called UE is received are sent out by calling UE When sending, concrete processing procedure of the network element to network transmission parameter.

Also, in this step, the P-CSCF entities of calling UE side receive calling UE transmission After INVITE, notify that the media forwarding module (MP) in the P-CSCF entities of calling UE side is beaten The media forwarding port of calling UE side is opened, to the video counts for forwarding calling UE to send in subsequent process According to bag and/or VoP etc..

Step 3：Be sent to for the calling INVITE for carrying network transmission parameter called by S-CSCF entities The P-CSCF entities of UE sides.

Here, S-CSCF entities are not involved in calling UE and quilt due to not having media forwarding module (MP) The transmission of the media information between UE is cried, therefore, S-CSCF entities are that will carry network transmission parameter INVITE be transmitted to the P-CSCF entities of called UE side, and for being taken in INVITE The network transmission parameter of band does not make any treatment.

Step 4：After the P-CSCF entities of called UE side receive INVITE, the P-CSCF is notified Media forwarding module (MP) in entity opens the media forwarding port of network side；And determine and caller The network transmission parameter of the transmission link between the P-CSCF entities of UE sides, and joined according to the network transmission Several network transmission parameters to being carried in INVITE are adjusted, and the network transmission parameter that will be adjusted is made Called UE is sent to after being carried in INVITE for the header field of the INVITE.

Specifically, after the P-CSCF entities of called UE side receive INVITE, according to itself with The network transmission quality of the transmission link between the P-CSCF entities of calling UE side, determines network transmission parameter (including packet loss, bandwidth, encryption level), by reading the header field of INVITE, is informed in this Network transmission parameter is carried in INVITE, and then, will itself determine network transmission parameter with The network transmission parameter carried in INVITE is contrasted, the net carried in adjustment INVITE Network configured transmission, carries the network transmission parameter after adjustment as the header field of the INVITE afterwards Called UE is sent to after in INVITE.

Situation two described in step correspondence media consulation method above to network side：Participate in caller The SIP signaling messages that the network element of the media information transmission between UE and called UE is received are by participation caller When another network element of the media information transmission between UE and called UE sends, the network element is joined to network transmission Several concrete processing procedures.

Also, after in this step, the P-CSCF entities of called UE side receive INVITE, Notify that the media that the media forwarding module (MP) in the P-CSCF entities of called UE side opens network side turn Originator mouth, in subsequent process forward calling UE send by network side forward video data bag and / or VoP etc..

Step 5：After called UE receives the INVITE of the carrying network transmission parameter, it is determined that with Calling UE carries out the media coding format used during media communication.

Specifically, called UE is taken after the INVITE for carrying network transmission parameter is received from this Network transmission parameter and SDP1 message are obtained in INVITE with network transmission parameter.Then, The media coding format for selecting called UE also to support from SDP1 message, secondly, joins according to network transmission Number, uses when selection carries out media communication with calling UE from the media coding format that called UE is also supported Media coding format.Specifically chosen and calling UE carries out the media coding format used during media communication Process, can use method provided in an embodiment of the present invention, and therefore not to repeat here.

Step 6：Called UE replys response message (200OK) to the P-CSCF entities of called UE side, Its network transmission parameter and SDP2 message for receiving is carried in the response message.

In SDP2 message, media communication is carried out with calling UE comprising what called UE in step 5 was selected The media coding format of Shi Caiyong.

Step 7：After the P-CSCF entities of called UE side receive response message (200OK), notify Media forwarding module (MP) in this P-CSCF entities opens the media forwarding port of called UE side；With And the response message (200 OK) is sent to S-CSCF entities.

Wherein, called UE side P-CSCF entities notify the media forwarding module (MP) in this P-CSCF entities The media forwarding port of called UE side is opened, is used to forward the video counts of called UE transmission in subsequent process According to bag and/or VoP etc..

In this step, called UE side P-CSCF entities are without to carrying in response message (200OK) Network transmission parameter is adjusted and changed.

Step 8：S-CSCF entities are received after response message (200OK), by the response message (200 OK the P-CSCF entities of calling UE side) are sent to.

Step 9：After the P-CSCF entities of calling UE side receive response message (200OK), notify Media forwarding module (MP) in this P-CSCF entities opens the media forwarding port of network side；And will The response message (200OK) is sent to calling UE.

Wherein, the P-CSCF entities of calling UE side notify the media forwarding module in this P-CSCF entities (MP) the media forwarding port of network side is opened, is used to forward that called UE in subsequent process sends by net Video data bag and/or VoP of the forwarding of network side etc..

Also, in this step, the P-CSCF entities of calling UE side are without to response message (200OK) The network transmission parameter of middle carrying is adjusted and changed.

Step 10：After calling UE receives response message (200OK), it is determined that carrying out matchmaker with called UE The media coding format used during body communication.

Specifically, after calling UE receives response message (200OK), from the response message (200OK) It is middle to obtain network transmission parameter and SDP2 message, and then according to network transmission parameter in SDP2 message Media coding format carry out validity checking, it is determined that the media used when carrying out media communication with called UE Coded format.

Step 11：Calling UE is to calling UE side:P-CSCF entities send response (ACK) message, SDP3 message is carried in response (ACK) message.Wherein, comprising in step 10 in SDP3 message The media coding format used when carrying out media communication with called UE that calling UE determines.

Step 12：Calling UE side:After P-CSCF entities receive response (ACK) message, should by this Answer (ACK) message and be sent to S-CSCF entities.

Step 13：Response (ACK) message is sent to called UE side by S-CSCF entities:P-CSCF Entity.

Step 14：Called UE side:Response (ACK) message is sent to called UE by P-CSCF entities.

So as to whole media consultation process terminates, and subsequently, calling UE and called UE are using final negotiation Media coding format send media bag, and then carry out media communication.

Certainly, in above-mentioned media consultation process, the media information participated between calling UE and called UE is passed Defeated network element can also be other network elements in addition to P-CSCF, for example, can also be session-orient E-Service net First SBC etc..

Media consulation method described in above-described embodiment, the media information transmission link being related to is three, Certainly, under different application scenarios, the number of media information transmission link and the transmission matter of transmission link The situation of amount is also differed.Especially, in converged communication, various different communications may be related to Link, by using media consulation method provided in an embodiment of the present invention, media both sides can be according to actual transmissions Link condition, negotiates packet loss phenomenon when being communicated between best result, and then reduction media, it is ensured that video. The normal output of audio etc., lifts Consumer's Experience.

The device corresponding with above-mentioned media consulation method is described below.

In called UE side, referring to Fig. 5, a kind of device of media negotiation provided in an embodiment of the present invention, bag Include：

Acquiring unit 51, for obtaining the Session Description Protocol that network transmission parameter and calling UE send SDP message；

Determining unit 52, for according to the network transmission parameter and the SDP message, it is determined that and institute State the media coding format that calling UE used during media communication；

Transmitting element 53, for the media coding format to be sent into the calling UE, by the caller UE completes the media consultation process according to the media coding format.

The device can be for example user equipment, can be called subscriber equipment specifically.

It is preferred that acquiring unit 51 specifically for：

Receive the SIP signaling messages that network side sends；

Here, network side sends SIP signaling messages, and calling UE and called UE are participated in specially in network side Between media information transmission network element send.

The bandwidth of the transmission link；

It is preferred that determining unit 52 specifically for：

It is preferred that determining unit 52 is according to the network transmission parameter, from the matchmaker that the called UE is supported When the media coding format used when carrying out media communication with the calling UE is determined in body coded format, tool Body is used for：

It is preferred that transmitting element 53 specifically for：

In calling UE side, referring to Fig. 6, a kind of device of media negotiation provided in an embodiment of the present invention, bag Include：

Acquiring unit 21, network transmission parameter and media coding format for obtaining called UE transmission；

Determining unit 22, for carrying out legitimacy to the media coding format according to the network transmission parameter Check, it is determined that the media coding format used when carrying out media communication with called UE；

Transmission unit 23, the media coding format used during for described and called UE to be carried out into media communication The called UE is sent to, the media consultation process is completed.

The device can be for example user equipment, can be calling subscriber equipment specifically.

It is preferred that the transmission unit 23 obtains the network biography that called UE sends in the acquiring unit 21 Before defeated parameter and media coding format, it is additionally operable to：Transmission includes the meeting of Session Description Protocol SDP message Words initiation protocol SIP signaling messages give the called UE；

The acquiring unit 21 specifically for：The response message that the called UE sends is received, from described The network transmission parameter and the SDP message are obtained in response message, and is obtained from the SDP message The media coding format.

The bandwidth of the transmission link；

It is preferred that the transmission unit 23 specifically for：

The embodiment of the invention provides a kind of user equipment, including the above-mentioned media negotiation in called UE side The device of device and the media negotiation in calling UE side.

That is, the user equipment is provided simultaneously with the function of calling subscriber equipment and called subscriber equipment.And And, the user equipment may act as calling subscriber equipment, again can be as called subscriber equipment.

In network side, referring to Fig. 7, a kind of device of media negotiation provided in an embodiment of the present invention, including：

Receiving unit 31, for receiving session initiation protocol SIP signaling messages；

Transmitting element 32, for the link between the network element according to this network element and the transmission SIP signaling messages Network transmission quality, determine network transmission parameter, and the network transmission parameter is carried in SIP letters Make rear transmission in message.

The device, for example, can be to participate in the media information transmission network element between calling UE and called UE, Specifically, participate in media information transmission network element between calling UE and called UE for example can for P-CSCF, SBC etc., the P-CSCF can be the P-CSCF of calling UE side, or called UE side P-CSCF.Also, these participate in the media information transmission between calling subscriber equipment UE and called UE Network element includes media forwarding module, is used to forward the speech data sent between calling UE and called UE Bag and/or video data bag etc..

The bandwidth of the transmission link；

It is preferred that transmitting element specifically for：

When the SIP signaling messages that the receiving unit 31 is received are institutes when being sent by the calling UE Network transmission quality of the transmitting element 32 according to the transmission link between the present apparatus and the calling UE is stated, Determine the network transmission parameter of the link, and the network transmission parameter of the link is carried in the SIP signalings Sent after in message；

Or, when the SIP signaling messages that the receiving unit 31 is received are by participation calling UE and quilt When making another network element of the media information transmission between UE send, the transmitting element 32 is according to the present apparatus With the network transmission quality of the transmission link between another network element, the network transmission ginseng of the link is determined Carried in number, and the sip message that sends of network transmission parameter according to the link and another network element Network transmission parameter, is adjusted to the network transmission parameter in the SIP signaling messages, by the adjustment Network transmission parameter afterwards sends after carrying in the SIP signaling messages.

It is preferred that the transmitting element 32 is according between the present apparatus and the participation calling UE and called UE Media information transmission another network element between transmission link network transmission parameter, and another net The network transmission parameter carried in the sip message that unit sends, to the network transmission in the SIP signaling messages When packet loss in parameter is adjusted, specifically for：

It is preferred that the transmitting element 32 is according between the present apparatus and the participation calling UE and called UE Media information transmission another network element between transmission link network transmission parameter and another net The network transmission parameter carried in the sip message that unit sends, to the network transmission in the SIP signaling messages When bandwidth in parameter is adjusted, specifically for：

It is preferred that the transmitting element 32 is according between the present apparatus and the participation calling UE and called UE Media information transmission another network element between transmission link network transmission parameter and another net The network transmission parameter carried in the sip message that unit sends, to the network transmission in the SIP signaling messages When encryption level in parameter is adjusted, specifically for：

It is preferred that the receiving unit 31 is additionally operable to：Receive the response message that called UE is replied；It is described Transmitting element 32 is additionally operable to：The response message that receiving unit 31 is received is sent to calling UE, wherein The SDP that the network transmission parameter and called UE of called UE reception send is carried in the response message Message.

The embodiment of the present invention, can realize by with entity apparatus such as the processors of function such as transmission, reception State each functional unit.

It is preferred that the processor, such as can be that centre buries device (CPU), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field- Programmable Gate Array, FPGA) or CPLD (Complex Programmable Logic Device, CPLD) etc..

It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or meter Calculation machine program product.Therefore, the present invention can be using complete hardware embodiment, complete software embodiment or knot Close the form of the embodiment in terms of software and hardware.And, the present invention can be used and wherein wrapped at one or more Containing computer usable program code computer-usable storage medium (including but not limited to magnetic disk storage and Optical memory etc.) on implement computer program product form.

The present invention is produced with reference to method according to embodiments of the present invention, equipment (system) and computer program The flow chart and/or block diagram of product is described.It should be understood that can by computer program instructions realize flow chart and / or block diagram in each flow and/or the flow in square frame and flow chart and/or block diagram and/ Or the combination of square frame.These computer program instructions to all-purpose computer, special-purpose computer, insertion can be provided The processor of formula processor or other programmable data processing devices is producing a machine so that by calculating The instruction of the computing device of machine or other programmable data processing devices is produced for realizing in flow chart one The device of the function of being specified in individual flow or multiple one square frame of flow and/or block diagram or multiple square frames.

These computer program instructions may be alternatively stored in can guide computer or the treatment of other programmable datas to set In the standby computer-readable memory for working in a specific way so that storage is in the computer-readable memory Instruction produce include the manufacture of command device, the command device realization in one flow of flow chart or multiple The function of being specified in one square frame of flow and/or block diagram or multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices, made Obtain and series of operation steps is performed on computer or other programmable devices to produce computer implemented place Reason, so as to the instruction performed on computer or other programmable devices is provided for realizing in flow chart one The step of function of being specified in flow or multiple one square frame of flow and/or block diagram or multiple square frames.

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

Claims

1. a kind of method of media negotiation, it is characterised in that the method includes：

Called subscriber equipment UE obtains the Session Description Protocol that network transmission parameter and calling UE send SDP message；

The media coding format is sent to the calling UE by the called UE, by the calling UE According to the media coding format, media consultation process is completed.

2. method according to claim 1, it is characterised in that the called subscriber equipment UE is obtained The Session Description Protocol SDP message that network transmission parameter and calling UE send is taken, is specifically included：

The called UE receives the session initiation protocol SIP signaling messages that network side sends；

3. method according to claim 2, it is characterised in that the network transmission parameter include with One of lower parameter or combination：

The bandwidth of the transmission link；

4. method according to claim 3, it is characterised in that the called UE is according to the net Network configured transmission and the SDP message, it is determined that the matchmaker used when carrying out media communication with the calling UE Body coded format, specifically includes：

5. method according to claim 4, it is characterised in that the called UE is according to the net Network configured transmission, determines to be carried out with the calling UE in the media coding format supported from the called UE The media coding format used during media communication, specifically includes：

6. method according to claim 1, it is characterised in that the called UE is by the media Coded format is sent to the calling UE, specifically includes：

7. a kind of method of media negotiation, it is characterised in that the method includes：

The calling UE by it is described carry out media communication with the called UE when media coding format that uses The called UE is sent to, media consultation process is completed.

8. method according to claim 7, it is characterised in that the calling subscriber equipment UE is obtained Before taking the network transmission parameter and media coding format of called UE transmission, the method also includes：The master Making UE send includes the session initiation protocol SIP signaling messages of Session Description Protocol SDP message to the quilt It is UE；

9. method according to claim 8, it is characterised in that the network transmission parameter include with One of lower parameter or combination：

The bandwidth of the transmission link；

10. method according to claim 7, it is characterised in that the calling UE will described and quilt The media coding format for making UE be used when carrying out media communication is sent to the called UE, specifically includes：

The media coding format that the calling UE is used when described and called UE is carried out into media communication is carried In Session Description Protocol SDP message, the SDP message is sent to the quilt by response ACK message It is UE.

A kind of 11. methods of media negotiation, it is characterised in that the method includes：

At the beginning of the network element of the media information transmission between participation calling subscriber equipment UE and called UE receives session Beginning agreement SIP signaling message；

12. methods according to claim 11, it is characterised in that the network transmission parameter includes One of following parameter or combination：

The bandwidth of the transmission link；

13. methods according to claim 12, it is characterised in that the participation calling subscriber equipment The network element of the media information transmission between UE and called UE disappears according to this network element with the SIP signalings are sent The network transmission quality of the transmission link between the network element of breath, determines network transmission parameter, and the network is passed Defeated parameter sends after carrying in the SIP signaling messages, specifically includes：

14. methods according to claim 13, it is characterised in that the participation calling UE and quilt The network element of media information transmission between UE is according to this network element and described calling UE and called UE is participated in Between media information transmission another network element between transmission link network transmission parameter, it is and described another The network transmission parameter carried in the sip message that one network element sends, to the network in the SIP signaling messages Packet loss in configured transmission is adjusted, and specifically includes：

15. methods according to claim 13, it is characterised in that the participation calling UE and quilt The network element of media information transmission between UE is according to this network element and described calling UE and called UE is participated in Between media information transmission another network element between the network transmission parameter of transmission link and described another The network transmission parameter carried in the sip message that one network element sends, to the network in the SIP signaling messages Bandwidth in configured transmission is adjusted, and specifically includes：

16. methods according to claim 13, it is characterised in that the participation calling UE and quilt The network element of media information transmission between UE is according to this network element and described calling UE and called UE is participated in Between media information transmission another network element between the network transmission parameter of transmission link and described another The network transmission parameter carried in the sip message that one network element sends, to the network in the SIP signaling messages Encryption level in configured transmission is adjusted, and specifically includes：

17. a kind of devices of media negotiation, it is characterised in that the device includes：

Transmitting element, for the media coding format to be sent into the calling UE, by the calling UE According to the media coding format, media consultation process is completed.

18. devices according to claim 17, it is characterised in that the acquiring unit specifically for：

19. devices according to claim 18, it is characterised in that the network transmission parameter includes One of following parameter or combination：

The bandwidth of the transmission link；

20. devices according to claim 19, it is characterised in that the determining unit specifically for：

21. devices according to claim 20, it is characterised in that the determining unit is according to Network transmission parameter, determines to enter with the calling UE in the media coding format supported from the called UE During the media coding format used during row media communication, specifically for：

22. devices according to claim 17, it is characterised in that the transmitting element specifically for：

23. a kind of devices of media negotiation, it is characterised in that the device includes：

Transmission unit, the media coding format used during for described and called UE to be carried out into media communication is sent out The called UE is given, media consultation process is completed.

24. devices according to claim 23, it is characterised in that the transmission unit is obtained described Before taking network transmission parameter and media coding format that unit obtains called UE transmission, it is additionally operable to：Send Session initiation protocol SIP signaling messages including Session Description Protocol SDP message give the called UE；

25. devices according to claim 24, it is characterised in that the network transmission parameter includes One of following parameter or combination：

The bandwidth of the transmission link；

26. devices according to claim 23, it is characterised in that the transmission unit specifically for：

27. a kind of user equipmenies, it is characterised in that including the dress described in any claim of claim 17~22 Put, and the device described in any claim of claim 23~26.

28. a kind of devices of media negotiation, it is characterised in that the device includes：

29. devices according to claim 28, it is characterised in that the network transmission parameter includes One of following parameter or combination：

The bandwidth of the transmission link；

30. devices according to claim 29, it is characterised in that the transmitting element specifically for：

31. devices according to claim 30, it is characterised in that the transmitting element is according to this dress Put and the transmission between another network element of the media information transmission between the participation calling UE and called UE The network transmission ginseng carried in the network transmission parameter of link, and the sip message of another network element transmission Number, when being adjusted to the packet loss in the network transmission parameter in the SIP signaling messages, specifically for：

32. devices according to claim 30, it is characterised in that the transmitting element is according to this dress Put and the transmission between another network element of the media information transmission between the participation calling UE and called UE The network transmission ginseng carried in the sip message that the network transmission parameter of link and another network element send Number, when being adjusted to the bandwidth in the network transmission parameter in the SIP signaling messages, specifically for：

33. devices according to claim 30, it is characterised in that the transmitting element is according to this dress Put and the transmission between another network element of the media information transmission between the participation calling UE and called UE The network transmission ginseng carried in the sip message that the network transmission parameter of link and another network element send Number, it is specific to use when being adjusted to the encryption level in the network transmission parameter in the SIP signaling messages In：