CN102647402A - Consultation method for multimedia session, relevant equipment and system - Google Patents
Consultation method for multimedia session, relevant equipment and system Download PDFInfo
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- CN102647402A CN102647402A CN2011100433860A CN201110043386A CN102647402A CN 102647402 A CN102647402 A CN 102647402A CN 2011100433860 A CN2011100433860 A CN 2011100433860A CN 201110043386 A CN201110043386 A CN 201110043386A CN 102647402 A CN102647402 A CN 102647402A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
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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
- H04L65/1069—Session establishment or de-establishment
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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
- H04L65/1094—Inter-user-equipment sessions transfer or sharing
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Abstract
The embodiment of the invention discloses a consultation method for a multimedia session, relevant equipment and a system. The consultation method for a multimedia session comprises the following steps that: a called terminal receives first session consultation information from a calling terminal, wherein the attribute parameter carried by a session description protocol (SDP) message in the first session consultation information comprises the media parameters and the media redundance parameters of at least two media; the called terminal selects according to the attribute parameter carried by the received SDP message according to the local session capability; the called terminal generates a new SDP message according to the selected attribute parameter; and the called terminal sends the generated SDP message to the calling terminal by the second session consultation information. According to the technical scheme provided by the invention, the problem that single type of media is subjected to redundancy only in the session is solved.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of machinery of consultation, relevant device and system of Multimedia session.
Background technology
Along with multimedia conferencing is widely used, people are also increasingly high to the requirement of the service quality of multimedia application.In practical application, the factor that influences the multimedia conferencing quality has a lot, wherein, is apparent that the data-bag lost problem most, and data redundancy is to propose as one of scheme that addresses this problem.
Data redundancy refers to the technology of same storage in the different pieces of information bag; Under the average continuously situation that packet loss is lower; If data wrap in the transmission course and lost, then the recipient still can recombinate to the data message that loses and recovers through the redundant data in the follow-up data bag, to avoid the problem of the voice quality difference that factor causes according to packet loss; At present; Data redundancy has obtained extensive use, and has formed (RFC, Request For Comments) 2198 standards that request for comments.
At present Session Description Protocol (SDP that use more; Session Description Protocol) comes the redundant ability of the medium in the session is retrained; Calling party and recipient are through interactive sessions initializtion protocol (SIP; Session Initiation Protocol) message is set up session, carries out session negotiation (like the negotiation to contents such as the redundant ability of medium, media formats, medium encoding and decoding, medium receiver address, ports) through the SDP data of carrying in the sip message.
But; Above-mentioned RFC2198 standard only is described to the SDP of single type of data redundancy ability, and promptly based on existing RFC2198 standard, calling party and callee can only hold consultation to the redundant ability of single type of medium type; Yet; In a session, often there is multiple medium type (like voice, video etc.), therefore, existingly can only has tangible limitation the mode that the redundant ability of single type of medium type is held consultation.
Summary of the invention
The embodiment of the invention provides a kind of machinery of consultation, relevant device and system of Multimedia session, is used for solving the existing problem that only can carry out redundancy in session to single type of medium.
For solving the problems of the technologies described above, the embodiment of the invention provides following technical scheme:
A kind of machinery of consultation of Multimedia session comprises:
Terminal called receives the first session negotiation message from calling terminal, and the property parameters that the SDP message in the above-mentioned first session negotiation message carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium;
Terminal called is chosen the property parameters that the above-mentioned SDP message that receives carries according to the local session ability;
Terminal called generates new SDP message according to the above-mentioned property parameters of choosing;
Terminal called sends to above-mentioned calling terminal with the SDP message of above-mentioned generation through the second session negotiation message.
A kind of terminal comprises:
Receiving element is used to receive the first session negotiation message from calling terminal, and the property parameters that the SDP message in the above-mentioned first session negotiation message carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium;
Choose the unit, be used for the property parameters that the above-mentioned SDP message that receives carries being chosen according to the local session ability;
Generation unit is used for the property parameters of choosing unit selection according to above-mentioned, generates new SDP message;
Transmitting element is used for the SDP message that above-mentioned generation unit generates is sent to above-mentioned calling terminal through the second session negotiation message.
A kind of terminal comprises:
Transmitting element is used for sending the first session negotiation message to terminal called, and the property parameters that the SDP message in the above-mentioned first session negotiation message carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium;
Receiving element is used to receive the second session negotiation message that above-mentioned terminal called returns;
The session processing unit, the SDP message of the second session negotiation message that is used for receiving according to above-mentioned receiving element is set up or is refreshed the session with above-mentioned terminal called.
A kind of Multimedia session system comprises:
First terminal and second terminal;
Above-mentioned first terminal is used for sending the first session negotiation message to above-mentioned second terminal, and the property parameters that the Session Description Protocol SDP message in the above-mentioned first session negotiation message carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium; Receive the second session negotiation message that above-mentioned second terminal is returned, and set up the session that perhaps refreshes with above-mentioned second terminal according to the SDP message in the above-mentioned second session negotiation message.
Above-mentioned second terminal is used to receive the first session negotiation message from above-mentioned first terminal, and the property parameters that the SDP message in the above-mentioned first session negotiation message carries comprises the medium nuisance parameter of at least two kinds of medium; According to the local session ability property parameters that the above-mentioned SDP message that receives comprises is chosen; Generate new SDP message according to the above-mentioned property parameters of choosing; The SDP message of above-mentioned generation is sent to above-mentioned first terminal through the second session negotiation message.
Therefore; The technical scheme that the embodiment of the invention provides is expanded existing RFC2198 standard; Make and to explain the redundant ability of multiple medium simultaneously based on the message under the SDP agreement; Thereby make calling terminal and terminal called can set up or more before the new session redundant ability of multiple medium is held consultation simultaneously, and then solves existing only can be in session single type of medium are carried out redundant problem.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is embodiment schematic flow sheet of machinery of consultation of Multimedia session in the embodiment of the invention;
Fig. 2 is another embodiment schematic flow sheet of machinery of consultation of Multimedia session in the embodiment of the invention;
Fig. 3 is another embodiment schematic flow sheet of machinery of consultation of Multimedia session in the embodiment of the invention;
Fig. 4 is the structural representation at a kind of terminal in the embodiment of the invention;
Fig. 5 is the structural representation at another kind of terminal in the embodiment of the invention;
Fig. 6 is the structural representation of Multimedia session system in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of machinery of consultation, relevant device and system of Multimedia session.
For make goal of the invention of the present invention, characteristic, advantage can be more obvious and understandable; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment only is the present invention's part embodiment, but not whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Describe in the face of the machinery of consultation of a kind of Multimedia session in the embodiment of the invention down, see also Fig. 1, one embodiment comprises of the machinery of consultation of Multimedia session in the embodiment of the invention:
101, terminal called receives the first session negotiation message from calling terminal;
When the session of certain terminal (being calling terminal) preparatory initiation with opposite end (being terminal called); When setting up the session of perhaps renewal and terminal called, calling terminal sends the first session negotiation message to terminal called, with the triggering session initialization; Wherein, The above-mentioned first session negotiation message can be Session Initiation Protocol message, perhaps also can be other end-to-end peer protocol message based on the SDP agreement, does not limit here.The calling and called terminal can be through carrying the SDP message that comprises new session parameters (like session identification, session duration and property parameters such as media parameter, medium nuisance parameter etc.) in mutual session negotiation message; New session is held consultation, so that calling terminal can be set up perhaps more new session according to the session parameter after consulting.
In practical application, when calling terminal during to the terminal called initiation session, the media parameter of the medium type that it can be corresponding with the media data that transmits in advance (can comprise one or more medium) is encapsulated in the SDP message.Wherein, Above-mentioned media parameter includes but not limited to medium type indication parameter, medium encoding and decoding indication parameter; The medium encoding and decoding that above-mentioned medium encoding and decoding indication parameter can indicate a kind of calling terminal to support; The a plurality of medium encoding and decoding of calling terminal portability indication parameter is so that above-mentioned terminal called is known the medium encoding and decoding that calling terminal is supported when receiving the SDP message of calling terminal transmission.Further,, also can corresponding medium nuisance parameter also be encapsulated in this SDP message, above-mentioned SDP message be sent to terminal called through the first session negotiation message if calling terminal is supported the redundant ability of above-mentioned medium type.
In embodiments of the present invention; The property parameters that the SDP message that calling terminal sends carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium; Wherein, above-mentioned medium nuisance parameter includes but not limited to redundancy type indication parameter, the corresponding medium encoding and decoding indication parameter of redundant encoding and decoding.Wherein, the value of above-mentioned redundancy type indication parameter, medium encoding and decoding indication parameter can be load type (PT, the Payload Type) value of shining upon mutually with various medium encoding and decoding and redundant encoding and decoding.
102, terminal called is chosen the property parameters that the SDP message that receives carries according to the local session ability;
When terminal called receives the SDP message from calling terminal, can choose the property parameters (like media parameter, medium nuisance parameter etc.) that the SDP message that receives carries according to local session ability (like the redundant ability of the medium type of the medium encoding and decoding of the medium type supported, support, support and redundant encoding and decoding etc.).
In practical application; When terminal called to media parameter, when the medium nuisance parameter is chosen; Terminal called can be according to the medium type and the medium coding/decoding capability of this locality support; From the SDP message that receives, choose corresponding media parameter (like the corresponding medium type indication parameter of supporting with this locality of medium type, with the corresponding medium encoding and decoding indication parameter of medium encoding and decoding of this locality support); According to the redundant ability of the medium type of the medium coding/decoding capability of this locality and support, from the SDP message that receives, choose corresponding medium nuisance parameter, like the corresponding medium encoding and decoding indication parameter of redundancy type indication parameter and redundant encoding and decoding etc.
103, terminal called generates new SDP message according to the above-mentioned property parameters of choosing;
After the process of terminal called execution of step 102, can generate new SDP message according to the above-mentioned property parameters of choosing.
Will be understood that if terminal called has been chosen whole property parameters that the SDP that receives carries, then the SDP message of its generation can be just the same with the SDP message that receives.
104, terminal called sends to above-mentioned calling terminal with the SDP message of above-mentioned generation through the second session negotiation message;
Terminal called sends to above-mentioned calling terminal with the SDP message of above-mentioned generation through the second session negotiation message so that calling terminal according to terminal called return the SDP message set up or refresh the session with this terminal called.
Wherein, the above-mentioned second session negotiation message can be Session Initiation Protocol message, perhaps also can be other end-to-end peer protocol message based on the SDP agreement, does not limit here.
Need to prove; In the negotiations process of the Multimedia session of reality; Operations such as possible terminal called also can be made amendment to other session parameter except that above-mentioned property parameters in the SDP message that receives, deletion; But since this processing belong to prior art and with do not relate to the present invention the technical scheme that will set forth; Therefore, the embodiment of the invention is under the acquiescence terminal called situation that need not other session parameter in the SDP message that receives is made amendment (such as to session duration, the isoparametric retouching operation of redundant progression), the description that technical scheme of the present invention is carried out.
The technical scheme that the embodiment of the invention provides can be applicable in the session context of monotype, also can be applicable in the multimodal session context.
Therefore; The technical scheme that the embodiment of the invention provides is expanded existing RFC2198 standard; Make and to explain the redundant ability of multiple medium simultaneously based on the message under the SDP agreement; Thereby make calling terminal and terminal called can set up or more before the new session redundant ability of multiple medium is held consultation simultaneously, and then solves existing only can be in session single type of medium are carried out redundant problem.
Describe in the face of the machinery of consultation of a kind of Multimedia session in the embodiment of the invention down, see also Fig. 2, another embodiment of the machinery of consultation of Multimedia session comprises in the embodiment of the invention:
201, calling terminal sends the first session negotiation message to terminal called;
In practical application, when calling terminal during to the terminal called initiation session, the media parameter of the medium type that it can be corresponding with the media data that transmits in advance (can comprise one or more medium) is encapsulated in the SDP message.Wherein, Above-mentioned media parameter includes but not limited to medium type indication parameter, medium encoding and decoding indication parameter; The medium encoding and decoding that above-mentioned medium encoding and decoding indication parameter can indicate a kind of calling terminal to support; The a plurality of medium encoding and decoding of calling terminal portability indication parameter is so that above-mentioned terminal called is known the medium encoding and decoding that calling terminal is supported when receiving the SDP message of calling terminal transmission.Further,, also can corresponding medium nuisance parameter also be encapsulated in this SDP message, above-mentioned SDP message be sent to terminal called through the first session negotiation message if calling terminal is supported the redundant ability of above-mentioned medium type.
In embodiments of the present invention; The property parameters that the SDP message that calling terminal sends carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium; Wherein, above-mentioned medium nuisance parameter includes but not limited to redundancy type indication parameter, the corresponding medium encoding and decoding indication parameter of redundant encoding and decoding.Wherein, the value of above-mentioned redundancy type indication parameter, medium encoding and decoding indication parameter can be the PT value of shining upon mutually with various medium encoding and decoding and redundant encoding and decoding.
Wherein, the above-mentioned first session negotiation message can be Session Initiation Protocol message, perhaps also can be other end-to-end peer protocol message based on the SDP agreement, does not limit here.
202, calling terminal receives the second session negotiation message that above-mentioned terminal called returns, and sets up the session that perhaps refreshes with above-mentioned terminal called according to the SDP message in this second session negotiation message;
Calling terminal can be set up the session that perhaps refreshes with above-mentioned terminal called according to the SDP message that terminal called returns; If still include the medium nuisance parameter of two or more medium in the SDP message that terminal called returns, then calling terminal can carry out redundancy simultaneously to the multiple medium that in the session of above-mentioned foundation or renewal, transmit.
Wherein, the above-mentioned second session negotiation message can be Session Initiation Protocol message, perhaps also can be other end-to-end peer protocol message based on the SDP agreement, does not limit here.
Therefore; The technical scheme that the embodiment of the invention provides is expanded existing RFC2198 standard; Make and to explain the redundant ability of multiple medium simultaneously based on the message under the SDP agreement; Thereby make calling terminal and terminal called can set up or more before the new session redundant ability of multiple medium is held consultation simultaneously, and then solves existing only can be in session single type of medium are carried out redundant problem.
For ease of understanding technical scheme of the present invention better, with a concrete application examples machinery of consultation of a kind of Multimedia session in the embodiment of the invention is described below, see also Fig. 3.
Suppose that at first subscriber equipment (UE, User Equipment) 1 is the session originating end, i.e. calling terminal, UE2 is a terminal called.Wherein, UE1 supports RFC2833 coded data and speech data, and support G.711A, the speech data of coding G.729, possess the redundant ability of RFC2833 coded data, the redundant ability of speech data; UE2 support voice data are not supported the RFC2833 coding, only support the G.729 speech data of coding, possess the redundant ability of speech data.
301, UE1 sends the first session negotiation message to UE2;
The session parameter (comprising property parameters) that UE1 consults the preadmission row is encapsulated in the SDP message, and sends to UE2 through the first session negotiation message.
In the present embodiment, suppose to comprise in the SDP message that UE1 sends the media parameter and the medium nuisance parameter of RFC2833 coded data and two kinds of medium of speech data, concrete, comprise the sound-type indication parameter; G.711A corresponding medium encoding and decoding indication parameter (like PT value 8); G.729 corresponding medium encoding and decoding indication parameter (like PT value 18); Medium encoding and decoding indication parameter (like PT value 8), the G.729 corresponding medium encoding and decoding indication parameter (like PT value 18) of redundant encoding and decoding that speech data corresponding redundant type indication parameter (is 96 like the PT value), redundant encoding and decoding are G.711A corresponding; The medium encoding and decoding indication parameter (like PT value 97) that RFC2833 is corresponding; RFC2833 coded data corresponding redundant type indication parameter (like PT value 98), the medium encoding and decoding indication parameter (like PT value 97) that redundant encoding and decoding RFC2833 is corresponding.
302, UE2 chooses the property parameters that the SDP message that receives carries according to the local session ability;
When UE2 receives the above-mentioned first session negotiation message of being sent by UE1, can choose the property parameters that the SDP message in the first session negotiation message that receives carries according to the local session ability.
In the present embodiment,, do not support the RFC2833 coding, possess the redundant ability of speech data because UE2 only supports the speech data of G.729 encoding.Therefore; UE2 chooses sound-type indication parameter and G.729 corresponding medium encoding and decoding indication parameter (like PT value 18) from the SDP message that receives, from the SDP message, choose speech data corresponding redundant type indication parameter (is 96 like the PT value), redundant encoding and decoding medium encoding and decoding indication parameter (like PT value 18) G.729 again.
In above-mentioned choosing; UE2 does not support the RFC2833 coding; So do not choose media parameter relevant (the medium encoding and decoding indication parameter that RFC2833 is corresponding) and medium nuisance parameter (the medium encoding and decoding indication parameter that RFC2833 coded data corresponding redundant type indication parameter and redundant encoding and decoding RFC2833 are corresponding) with RFC2833; In addition, though the redundant ability of UE2 support voice data, because it does not support G.711A encoding and decoding; So can not utilize G.711 accordingly yet speech data is carried out redundancy encoding, so do not choose the G.711A corresponding medium encoding and decoding indication parameter of redundant encoding and decoding.Can understand; In technical scheme of the present invention,, but do not support the redundant ability of RFC2833 data if UE2 supports the RFC2833 codec data; Then UE2 will choose the corresponding media parameter of RFC2833 coded data, but does not choose the corresponding medium nuisance parameter of RFC2833 coded data.
303, UE2 generates new SDP message according to the above-mentioned property parameters of choosing;
After the process of terminal called execution of step 302, can generate new SDP message according to the above-mentioned property parameters of choosing.
304, UE2 sends to above-mentioned UE1 with the SDP message of above-mentioned generation through the second session negotiation message;
UE1 sends to UE2 with the SDP message of above-mentioned generation through the second session negotiation message so that UE2 according to UE1 return the SDP message set up or refresh the session with this terminal called.
305, the SDP message in the second session negotiation message returned according to UE2 of UE1 is set up or is refreshed the session with UE2;
UE2 can set up the session that perhaps refreshes with above-mentioned terminal called according to the SDP message that UE1 returns.
In embodiments of the present invention; When UE1 receives the SDP message that UE2 returns; Can know the speech data redundancy that UE2 supports the speech data of G.729 encoding and G.729 encodes; Then it can transmit the G.729 speech data of coding in being about to the session of setting up, and to utilizing G.729 to encode this speech data is carried out redundancy.
Can understand, if UE2 supports the redundant ability of RFC2833 coded data and RFC2833 data, then UE1 can be to transmission in being about to the session of setting up the G.729 speech data and the RFC2833 coded data of coding, and simultaneously these two kinds of data is carried out redundancy.
The above-mentioned first session negotiation message and the second meeting negotiation message can be Session Initiation Protocol message, perhaps also can be other end-to-end peer protocol message based on the SDP agreement, do not limit here.
Need to prove; In the negotiations process of the Multimedia session of reality; Operations such as above-mentioned UE1 possibly also can make amendment to other session parameter except that above-mentioned property parameters in the SDP message that receives, deletion; But since this processing belong to prior art and with do not relate to the present invention the technical scheme that will set forth; Therefore, the embodiment of the invention is under the acquiescence UE1 situation that need not other session parameter in the SDP message that receives is made amendment (such as to session duration, the isoparametric retouching operation of redundant progression), the description that technical scheme of the present invention is carried out.
Therefore; The technical scheme that the embodiment of the invention provides is expanded existing RFC2198 standard; Make and to explain the redundant ability of multiple medium simultaneously based on the message under the SDP agreement; Thereby make calling terminal and terminal called can set up or more before the new session redundant ability of multiple medium is held consultation simultaneously, and then solves existing only can be in session single type of medium are carried out redundant problem.
Describe in the face of a kind of terminal of the machinery of consultation that is used to realize above-mentioned Multimedia session in the embodiment of the invention down, see also Fig. 4, a kind of terminal that the embodiment of the invention provides comprises:
Receiving element 401 is used to receive the first session negotiation message from calling terminal;
Wherein, the property parameters that carries of the SDP message in the above-mentioned first session negotiation message comprises the media parameter and the medium nuisance parameter of at least two kinds of medium.
Choose unit 402, be used for the property parameters that the SDP message that receives carries being chosen according to the local session ability;
When receiving element 401 receives the SDP message from calling terminal, can trigger choose unit 402 according to the local session ability (like the redundant ability of the medium type of the medium encoding and decoding of the medium type supported, support, support and redundant encoding and decoding etc.) property parameters (like media parameter, medium nuisance parameter etc.) that the SDP message that receives carries is chosen.
In practical application; When above-mentioned terminal to media parameter, when the medium nuisance parameter is chosen; Particularly; Choose medium type and medium coding/decoding capability that unit 402 can be supported according to this locality, from the SDP message that receives, choose corresponding media parameter (like the corresponding medium type indication parameter of supporting with this locality of medium type, the medium encoding and decoding indication parameter corresponding) with the local media coding/decoding capability; According to the redundant ability of the medium type of the medium coding/decoding capability of this locality and support, from the SDP message that receives, choose corresponding medium nuisance parameter, like the corresponding medium encoding and decoding indication parameter of redundancy type indication parameter and redundant encoding and decoding etc.
It can be Session Initiation Protocol message that above-mentioned first session negotiation disappears, and perhaps also can be other end-to-end peer protocol message based on the SDP agreement, does not limit here.
Transmitting element 404 is used for the SDP message that generation unit 403 generates is sent to above-mentioned calling terminal through the second session negotiation message.
The above-mentioned second meeting negotiation message can be a Session Initiation Protocol message, perhaps also can be other end-to-end peer protocol message based on the SDP agreement, does not limit here.
Need to prove; The terminal of present embodiment can be like the terminal called among the above-mentioned method embodiment; Can be used for realizing whole technical schemes of said method embodiment; The function of its each functional module can specifically realize that its concrete implementation procedure can repeat no more with reference to the associated description in the foregoing description according to the method among the said method embodiment here.
Describe in the face of the another kind of terminal of the machinery of consultation that is used to realize above-mentioned Multimedia session in the embodiment of the invention down, see also Fig. 5, a kind of terminal that the embodiment of the invention provides comprises:
Transmitting element 501 is used for sending the conversation initialized protocol first session negotiation message to terminal called;
Wherein, the property parameters that carries of the Session Description Protocol SDP message in the above-mentioned first session negotiation message comprises the media parameter and the medium nuisance parameter of at least two kinds of medium; Above-mentioned media parameter includes but not limited to medium type indication parameter, medium encoding and decoding indication parameter; Above-mentioned medium nuisance parameter includes but not limited to redundancy type indication parameter, the corresponding medium encoding and decoding indication parameter of redundant encoding and decoding.Wherein, the value of above-mentioned redundancy type indication parameter, medium encoding and decoding indication parameter can be the PT value of shining upon mutually with various medium encoding and decoding and redundant encoding and decoding.
Receiving element 502 is used to receive the second session negotiation message that above-mentioned terminal called returns;
The above-mentioned first session negotiation message and the second meeting negotiation message can be Session Initiation Protocol message, perhaps also can be other end-to-end peer protocol message based on the SDP agreement, do not limit here.
Need to prove; The terminal of present embodiment can be like the calling terminal among the above-mentioned method embodiment; Can be used for realizing whole technical schemes of said method embodiment; The function of its each functional module can specifically realize that its concrete implementation procedure can repeat no more with reference to the associated description in the foregoing description according to the method among the said method embodiment here.
Therefore; The technical scheme that the embodiment of the invention provides is expanded existing RFC2198 standard; Make and to explain the redundant ability of multiple medium simultaneously based on the message under the SDP agreement; Thereby make calling terminal and terminal called can set up or more before the new session redundant ability of multiple medium is held consultation simultaneously, and then solves existing only can be in session single type of medium are carried out redundant problem.
Describe in the face of the Multimedia session system in the embodiment of the invention down, see also Fig. 6, the Multimedia session system in the embodiment of the invention comprises:
Wherein, first terminal 601 is used for sending the first session negotiation message to second terminal 602, and wherein, the property parameters that the SDP message in the first session negotiation message carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium; Receive the second session negotiation message that second terminal 602 is returned, and set up the session that perhaps refreshes with second terminal 602 according to the SDP message in the second session negotiation message that receives.
In practical application, when first terminal 601 during to second terminal, 602 initiation session, the media parameter of the medium type that it can be corresponding with the media data that transmits in advance (can comprise one or more medium) is encapsulated in the SDP message.Wherein, Above-mentioned media parameter includes but not limited to medium type indication parameter, medium encoding and decoding indication parameter; The medium encoding and decoding that above-mentioned medium encoding and decoding indication parameter can indicate a kind of first terminal 601 to support; The a plurality of medium encoding and decoding of first terminal, 601 portabilities indication parameter is so that the medium encoding and decoding that first terminal 601 is supported are known in above-mentioned second terminal 602 when receiving the SDP message that sends at first terminal 601.Further,, also can corresponding medium nuisance parameter also be encapsulated in this SDP message, above-mentioned SDP message be sent to second terminal 602 through the first session negotiation message if the redundant ability of above-mentioned medium type is supported at first terminal 601.
Wherein, second terminal 602 is used to receive the first session negotiation message from first terminal 601, and wherein, the property parameters that the SDP message in the first session negotiation message carries comprises the medium nuisance parameter of at least two kinds of medium; According to the local session ability property parameters that the SDP message that receives carries is chosen; Generate new SDP message according to the above-mentioned property parameters of choosing; The SDP message of above-mentioned generation is sent to first terminal 601 through the second session negotiation message.In practical application; When the 602 pairs of media parameter in second terminal, when the medium nuisance parameter is chosen; Second terminal 602 can be according to the medium type and the medium coding/decoding capability of this locality support; From the SDP message that receives, choose corresponding media parameter (like the corresponding medium type indication parameter of supporting with this locality of medium type, the medium encoding and decoding indication parameter corresponding) with the local media coding/decoding capability; According to the redundant ability of the medium type of the medium coding/decoding capability of this locality and support, from the SDP message that receives, choose corresponding medium nuisance parameter, like the corresponding medium encoding and decoding indication parameter of redundancy type indication parameter and redundant encoding and decoding etc.
The above-mentioned first session negotiation message and the second meeting negotiation message can be Session Initiation Protocol message, perhaps also can be other end-to-end peer protocol message based on the SDP agreement, do not limit here.
Need to prove; First terminal 601 of present embodiment can be like the calling terminal among the above-mentioned method embodiment; Second terminal 602 of present embodiment can be like the terminal called among the above-mentioned method embodiment, and it all can be used for realizing whole technical schemes of said method embodiment, and the function of its each functional module can specifically realize according to the method among the said method embodiment; Its concrete implementation procedure can repeat no more with reference to the associated description in the foregoing description here.
Therefore; The technical scheme that the embodiment of the invention provides is expanded existing RFC2198 standard; Make and to explain the redundant ability of multiple medium simultaneously based on the message under the SDP agreement; Thereby make calling terminal and terminal called can set up or more before the new session redundant ability of multiple medium is held consultation simultaneously, and then solves existing only can be in session single type of medium are carried out redundant problem.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; The above-mentioned storage medium of mentioning can be a read-only memory, random asccess memory, disk or CD etc.
More than machinery of consultation, relevant device and the system of Multimedia session provided by the present invention carried out detailed introduction; For one of ordinary skill in the art; Thought according to the embodiment of the invention; The part that on embodiment and range of application, all can change, to sum up, this description should not be construed as limitation of the present invention.
Claims (10)
1. the machinery of consultation of a Multimedia session is characterized in that, comprising:
Terminal called receives the first session negotiation message from calling terminal, and the property parameters that the Session Description Protocol SDP message in the said first session negotiation message carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium;
Terminal called is chosen the property parameters that the said SDP message that receives carries according to the local session ability;
Terminal called generates new SDP message according to the said property parameters of choosing;
Terminal called sends to said calling terminal with the SDP message of said generation through the second session negotiation message.
2. method according to claim 1 is characterized in that,
The property parameters that said terminal called carries the said SDP message that receives according to the local session ability is chosen and is specially:
Medium type and medium coding/decoding capability that terminal called is supported according to this locality are chosen corresponding media parameter from the said SDP message that receives, said media parameter comprises medium type indication parameter and medium encoding and decoding indication parameter;
Terminal called is according to the redundant ability of the medium type of the medium coding/decoding capability of this locality and support; From the said SDP message that receives, choose corresponding medium nuisance parameter, said medium nuisance parameter comprises redundancy type indication parameter and the corresponding medium encoding and decoding indication parameter of redundant encoding and decoding.
3. method according to claim 2 is characterized in that,
The value of said medium encoding and decoding indication parameter is specially the corresponding load type PT value of said medium encoding and decoding;
And/or the value of said redundancy type indication parameter is specially the corresponding load type PT value of said redundancy type.
4. according to each described method in the claim 1 to 3, it is characterized in that,
The said first session negotiation message is specially Session initiation protocol SIP message or is the end-to-end peer protocol message based on the SDP agreement;
The said second session negotiation message is specially Session initiation protocol SIP message or is the end-to-end peer protocol message based on the SDP agreement.
5. a terminal is characterized in that, comprising:
Receiving element is used to receive the first session negotiation message from calling terminal, and the property parameters that the Session Description Protocol SDP message in the said first session negotiation message carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium;
Choose the unit, be used for the property parameters that the said SDP message that receives carries being chosen according to the local session ability;
Generation unit is used for the property parameters of choosing unit selection according to said, generates new SDP message;
Transmitting element is used for the SDP message that said generation unit generates is sent to said calling terminal through the second session negotiation message.
6. terminal according to claim 5 is characterized in that,
The said unit of choosing specifically is used for, and according to medium type and the medium coding/decoding capability that this locality is supported, from the said SDP message that receives, chooses corresponding media parameter, and said media parameter comprises medium type indication parameter and medium encoding and decoding indication parameter; Redundant ability according to the medium type of the medium coding/decoding capability of this locality and support; From the said SDP message that receives, choose corresponding medium nuisance parameter, said medium nuisance parameter comprises redundancy type indication parameter and the corresponding medium encoding and decoding indication parameter of redundant encoding and decoding.
7. a terminal is characterized in that, comprising:
Transmitting element is used for sending the first session negotiation message to terminal called, and the property parameters that the Session Description Protocol SDP message in the said first session negotiation message carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium;
Receiving element is used to receive the second session negotiation message that said terminal called returns;
The session processing unit, the SDP message of the second session negotiation message that is used for receiving according to said receiving element is set up or is refreshed the session with said terminal called.
8. terminal according to claim 7; It is characterized in that; Said session processing unit also is used for when the said second session negotiation message is carried the medium nuisance parameter of two or more medium, the multiple medium that in the session of said foundation or renewal, transmit being carried out redundancy.
9. a Multimedia session system is characterized in that, comprising:
First terminal and second terminal;
Said first terminal is used for sending the first session negotiation message to said second terminal, and the property parameters that the Session Description Protocol SDP message in the said first session negotiation message carries comprises the media parameter and the medium nuisance parameter of at least two kinds of medium; Receive the second session negotiation message that said second terminal is returned, and set up the session that perhaps refreshes with said second terminal according to the SDP message in the said second session negotiation message;
Said second terminal is used to receive the first session negotiation message from said first terminal, and the property parameters that the SDP message in the said first session negotiation message carries comprises the medium nuisance parameter of at least two kinds of medium; According to the local session ability property parameters that the said SDP message that receives comprises is chosen; Generate new SDP message according to the said property parameters of choosing; The SDP message of said generation is sent to said first terminal through the second session negotiation message.
10. system according to claim 9 is characterized in that,
Said first terminal also is used for when the said second session negotiation message is carried the medium nuisance parameter of two or more medium, the multiple medium that in the session of said foundation or renewal, transmit being carried out redundancy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110043386.0A CN102647402B (en) | 2011-02-22 | 2011-02-22 | A kind of machinery of consultation of Multimedia session, relevant device and system |
| PCT/CN2011/081401 WO2012113240A1 (en) | 2011-02-22 | 2011-10-27 | Multimedia session negotiation method, related device and system |
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| CN201110043386.0A CN102647402B (en) | 2011-02-22 | 2011-02-22 | A kind of machinery of consultation of Multimedia session, relevant device and system |
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| WO2012113240A1 (en) | 2012-08-30 |
| CN102647402B (en) | 2015-07-29 |
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