CN102647402B - A kind of machinery of consultation of Multimedia session, relevant device and system - Google Patents
A kind of machinery of consultation of Multimedia session, relevant device and system Download PDFInfo
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- CN102647402B CN102647402B CN201110043386.0A CN201110043386A CN102647402B CN 102647402 B CN102647402 B CN 102647402B CN 201110043386 A CN201110043386 A CN 201110043386A CN 102647402 B CN102647402 B CN 102647402B
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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
- H04L69/24—Negotiation of communication capabilities
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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 kind of machinery of consultation of Multimedia session, relevant device and system.Wherein, the machinery of consultation of Multimedia session comprises: terminal called receives a first session negotiation message from calling terminal, and the property parameters that the Session Description Protocol SDP message in described first session negotiation message carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media; Terminal called is chosen the property parameters that the described SDP message received carries according to local session ability; Terminal called according to described in the property parameters chosen generate new SDP message; The SDP message of described generation is sent to described calling terminal by the second session negotiation message by terminal called.Technical scheme provided by the invention efficiently solves the existing problem only carrying out redundancy in a session to single class media.
Description
Technical field
The present invention relates to communication field, particularly relate to a kind of machinery of consultation of Multimedia session, relevant device and system.
Background technology
Along with multimedia conferencing is widely used, the requirement of people to the service quality of multimedia application is also more and more higher.In actual applications, affecting a lot of because have of multimedia conferencing quality, wherein, be apparent that data-bag lost problem most, and data redundancy proposes as one of scheme solving this problem.
Data redundancy refers to the technology same data be stored in different pieces of information bag, when average continual data package dropout rate is lower, if data wrap in transmitting procedure and lost, then recipient still to recombinate to the data message lost by the redundant data in follow-up data bag and recovers, the problem of the voice quality difference caused to avoid factor data packet loss, at present, data redundancy is widely applied, and define (RFC, Request For Comments) 2198 standards that request for comments.
Use Session Description Protocol (SDP at present more, Session Description Protocol) redundant ability of the media in session is retrained, calling party and recipient are by interactive sessions initializtion protocol (SIP, Session Initiation Protocol) message sets up session, to be conversated negotiation (negotiation as contents such as the redundant ability to media, media formats, media encoding and decoding, media receiver address, ports) by the SDP data of carrying in sip message.
But, above-mentioned RFC2198 standard is only described for the SDP of single class data redundancy ability, namely based on existing RFC2198 standard, calling party and callee can only hold consultation to the redundant ability of single class medium type, but, in a session, often there is multiple media type (as voice, video etc.), therefore, existing can only exist obvious limitation to the mode that the redundant ability of single class medium type is held consultation.
Summary of the invention
Embodiments provide a kind of machinery of consultation of Multimedia session, relevant device and system, for solving the existing problem only carrying out redundancy in a session to single class media.
For solving the problems of the technologies described above, the embodiment of the present invention provides following technical scheme:
A machinery of consultation for Multimedia session, comprising:
Terminal called receives the first session negotiation message from calling terminal, and the property parameters that the SDP message in above-mentioned first session negotiation message carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media;
Terminal called is chosen the property parameters that the above-mentioned SDP message received carries according to local session ability;
Terminal called generates new SDP message according to the above-mentioned property parameters chosen;
The SDP message of above-mentioned generation is sent to above-mentioned calling terminal by the second session negotiation message by terminal called.
A kind of terminal, comprising:
Receiving element, for receiving the first session negotiation message from calling terminal, the property parameters that the SDP message in above-mentioned first session negotiation message carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media;
Choose unit, for choosing the property parameters that the above-mentioned SDP message received carries according to local session ability;
Generation unit, for according to the above-mentioned property parameters choosing unit selection, generates new SDP message;
Transmitting element, sends to above-mentioned calling terminal for the SDP message generated by above-mentioned generation unit by the second session negotiation message.
A kind of terminal, comprising:
Transmitting element, for sending the first session negotiation message to terminal called, the property parameters that the SDP message in above-mentioned first session negotiation message carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media;
Receiving element, for receiving the second session negotiation message that above-mentioned terminal called returns;
Dialog processing unit, for the SDP message in the second session negotiation message of receiving according to above-mentioned receiving element, sets up or refreshes and the session of above-mentioned terminal called.
A kind of Multimedia session system, comprising:
First terminal and the 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 above-mentioned first session negotiation message carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media; Receive the second session negotiation message that above-mentioned second terminal returns, and set up according to the SDP message in above-mentioned second session negotiation message or refresh and the session of above-mentioned second terminal.
Above-mentioned second terminal is for receiving the first session negotiation message from above-mentioned first terminal, and the property parameters that the SDP message in above-mentioned first session negotiation message carries comprises the Media Redundancy parameter of at least two kinds of media; According to local session ability, the property parameters that the above-mentioned SDP message received comprises is chosen; New SDP message is generated according to the above-mentioned property parameters chosen; The SDP message of above-mentioned generation is sent to above-mentioned first terminal by the second session negotiation message.
Therefore, the technical scheme that the embodiment of the present invention provides is expanded existing RFC2198 standard, make can state the redundant ability of media based on the message under SDP agreement simultaneously, thus calling terminal and terminal called can be held consultation to the redundant ability of media before new session in foundation or more simultaneously, and then solve existing only can the problem of single class media being carried out to redundancy in a session.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is machinery of consultation embodiment schematic flow sheet of Multimedia session in the embodiment of the present invention;
Fig. 2 is another embodiment schematic flow sheet of machinery of consultation of Multimedia session in the embodiment of the present invention;
Fig. 3 is another embodiment schematic flow sheet of machinery of consultation of Multimedia session in the embodiment of the present invention;
Fig. 4 is the structural representation of a kind of terminal in the embodiment of the present invention;
Fig. 5 is the structural representation of another kind of terminal in the embodiment of the present invention;
Fig. 6 is the structural representation of Multimedia session system in the embodiment of the present invention.
Embodiment
Embodiments provide a kind of machinery of consultation of Multimedia session, relevant device and system.
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, and not all embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Be described a kind of in embodiment of the present invention machinery of consultation of Multimedia session below, refer to Fig. 1, in the embodiment of the present invention, an embodiment of the machinery of consultation of Multimedia session comprises:
101, terminal called receives the first session negotiation message from calling terminal;
When certain terminal (i.e. calling terminal) initiates the session with opposite end (i.e. terminal called) in advance, set up or upgrade and the session of terminal called time, calling terminal sends the first session negotiation message to terminal called, with triggering session initialization, wherein, above-mentioned first session negotiation message can be Session Initiation Protocol message, or also can be other end-to-end peer protocol message based on SDP agreement, is not construed as limiting herein.Calling and called terminal comprises the SDP message of new session parameters (if session identification, session duration and property parameters are as media parameter, Media Redundancy parameter etc.) by carrying in mutual session negotiation message, new session is held consultation, so that calling terminal can be set up or more new session according to the session parameter after consulting.
In actual applications, when calling terminal is to terminal called initiation session, the media parameter of medium type corresponding for the media data of pre-transmission (can comprise one or more media) can be encapsulated in SDP message by it.Wherein, above-mentioned media parameter includes but not limited to medium type indication parameter, media encoding and decoding indication parameter, the media encoding and decoding that above-mentioned media encoding and decoding indication parameter can indicate a kind of calling terminal to support, calling terminal can carry multiple media encoding and decoding indication parameter, to make above-mentioned terminal called when receiving the SDP message that calling terminal sends, know the media encoding and decoding that calling terminal is supported.Further, if calling terminal supports the redundant ability of above-mentioned medium type, also can corresponding Media Redundancy parameter be also encapsulated in this SDP message, by the first session negotiation message, above-mentioned SDP message be sent to terminal called.
In embodiments of the present invention, the property parameters that the SDP message that calling terminal sends carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media, wherein, above-mentioned Media Redundancy parameter includes but not limited to the media encoding and decoding indication parameter that redundancy type indication parameter, redundancy encoding and decoding are corresponding.Wherein, the value of above-mentioned redundancy type indication parameter, media encoding and decoding indication parameter can be load type (PT, the Payload Type) value mapped mutually with various media encoding and decoding and redundancy encoding and decoding.
102, terminal called is chosen the property parameters that the SDP message received carries according to local session ability;
When terminal called receives the SDP message from calling terminal, can choose the property parameters (as media parameter, Media Redundancy parameter etc.) that the SDP message received carries according to local session ability (medium type, the media encoding and decoding of support, the redundant ability of the medium type of support and redundancy encoding and decoding etc. as supported).
In actual applications, when terminal called is chosen media parameter, Media Redundancy parameter, the medium type that terminal called can be supported according to this locality and media coding/decoding capability, corresponding media parameter (as the medium type indication parameter corresponding with the medium type that this locality is supported, the media encoding and decoding indication parameter corresponding with the media encoding and decoding that this locality is supported) is chosen from the SDP message received; According to the redundant ability of the media coding/decoding capability of this locality and the medium type of support, from the SDP message received, choose corresponding Media Redundancy parameter, as redundancy type indication parameter and media encoding and decoding indication parameter etc. corresponding to redundancy encoding and decoding.
103, terminal called generates new SDP message according to the above-mentioned property parameters chosen;
After the process of terminal called execution of step 102, new SDP message can be generated according to the above-mentioned property parameters chosen.
Will be understood that, if terminal called have chosen whole property parameters that the SDP that receives carries, then its SDP message generated can be just the same with the SDP message received.
104, the SDP message of above-mentioned generation is sent to above-mentioned calling terminal by the second session negotiation message by terminal called;
The SDP message of above-mentioned generation is sent to above-mentioned calling terminal by the second session negotiation message by terminal called so that calling terminal according to terminal called return SDP message set up or refresh and the session of this terminal called.
Wherein, above-mentioned second session negotiation message can be Session Initiation Protocol message, or also can be other end-to-end peer protocol message based on SDP agreement, is not construed as limiting herein.
It should be noted that, in the negotiations process of the Multimedia session of reality, possible terminal called also can be modified to other session parameter except above-mentioned property parameters in the SDP message received, the operations such as deletion, but due to this process belong to prior art and with the technical scheme not relating to the present invention and will set forth, therefore, the embodiment of the present invention is (such as to session duration when giving tacit consent to terminal called without the need to modifying to other session parameter in the SDP message received, the isoparametric retouching operation of redundancy progression), to the description that technical scheme of the present invention is carried out.
The technical scheme that the embodiment of the present invention provides can be applicable in the session context of monotype, also can be applicable in multimodal session context.
Therefore, the technical scheme that the embodiment of the present invention provides is expanded existing RFC2198 standard, make can state the redundant ability of media based on the message under SDP agreement simultaneously, thus calling terminal and terminal called can be held consultation to the redundant ability of media before new session in foundation or more simultaneously, and then solve existing only can the problem of single class media being carried out to redundancy in a session.
Be described a kind of in embodiment of the present invention machinery of consultation of Multimedia session below, refer to Fig. 2, in the embodiment of the present invention, another embodiment of the machinery of consultation of Multimedia session comprises:
201, calling terminal sends the first session negotiation message to terminal called;
In actual applications, when calling terminal is to terminal called initiation session, the media parameter of medium type corresponding for the media data of pre-transmission (can comprise one or more media) can be encapsulated in SDP message by it.Wherein, above-mentioned media parameter includes but not limited to medium type indication parameter, media encoding and decoding indication parameter, the media encoding and decoding that above-mentioned media encoding and decoding indication parameter can indicate a kind of calling terminal to support, calling terminal can carry multiple media encoding and decoding indication parameter, to make above-mentioned terminal called when receiving the SDP message that calling terminal sends, know the media encoding and decoding that calling terminal is supported.Further, if calling terminal supports the redundant ability of above-mentioned medium type, also can corresponding Media Redundancy parameter be also encapsulated in this SDP message, by the first session negotiation message, above-mentioned SDP message be sent to terminal called.
In embodiments of the present invention, the property parameters that the SDP message that calling terminal sends carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media, wherein, above-mentioned Media Redundancy parameter includes but not limited to the media encoding and decoding indication parameter that redundancy type indication parameter, redundancy encoding and decoding are corresponding.Wherein, the value of above-mentioned redundancy type indication parameter, media encoding and decoding indication parameter can be the PT value mapped mutually with various media encoding and decoding and redundancy encoding and decoding.
Wherein, above-mentioned first session negotiation message can be Session Initiation Protocol message, or also can be other end-to-end peer protocol message based on SDP agreement, is not construed as limiting herein.
202, calling terminal receives the second session negotiation message that above-mentioned terminal called returns, and sets up according to the SDP message in this second session negotiation message or refresh and the session of above-mentioned terminal called;
The SDP message foundation that calling terminal can return according to terminal called or the session of refreshing and above-mentioned terminal called, if still include the Media Redundancy parameter of two or more media in the SDP message that terminal called returns, then calling terminal can carry out redundancy to the media transmitted in the session of above-mentioned foundation or renewal simultaneously.
Wherein, above-mentioned second session negotiation message can be Session Initiation Protocol message, or also can be other end-to-end peer protocol message based on SDP agreement, is not construed as limiting herein.
Therefore, the technical scheme that the embodiment of the present invention provides is expanded existing RFC2198 standard, make can state the redundant ability of media based on the message under SDP agreement simultaneously, thus calling terminal and terminal called can be held consultation to the redundant ability of media before new session in foundation or more simultaneously, and then solve existing only can the problem of single class media being carried out to redundancy in a session.
For ease of understanding technical solution of the present invention better, with an embody rule example, the machinery of consultation of a kind of Multimedia session in the embodiment of the present invention being described below, referring to Fig. 3.
First suppose that subscriber equipment (UE, User Equipment) 1 is session setup end, i.e. calling terminal, UE2 is terminal called.Wherein, UE1 supports RFC2833 coded data and speech data, and the speech data that G.711A, G.729 support encodes, possess the redundant ability of RFC2833 coded data, the redundant ability of speech data; UE2 support voice data, do not support that RFC2833 encodes, only support the speech data of G.729 encoding, possess the redundant ability of speech data.
301, UE1 sends the first session negotiation message to UE2;
The session parameter of holding consultation in advance (comprising property parameters) is encapsulated in SDP message by UE1, and sends to UE2 by the first session negotiation message.
In the present embodiment, suppose the media parameter and the Media Redundancy parameter that comprise RFC2833 coded data and speech data two kinds of media in the SDP message that UE1 sends, concrete, comprise sound-type indication parameter; G.711A corresponding media encoding and decoding indication parameter (as PT value 8); G.729 corresponding media encoding and decoding indication parameter (as PT value 18); The media encoding and decoding indication parameter (as PT value 18) that the media encoding and decoding indication parameter (as PT value 8) that the redundancy type indication parameter (if PT value is 96) that speech data is corresponding, redundancy encoding and decoding are G.711A corresponding, redundancy encoding and decoding are G.729 corresponding; The media encoding and decoding indication parameter (as PT value 97) that RFC2833 is corresponding; Redundancy type indication parameter (as PT value 98) corresponding to RFC2833 coded data, the media encoding and decoding indication parameter (as PT value 97) that redundancy encoding and decoding RFC2833 is corresponding.
302, UE2 chooses the property parameters that the SDP message received carries according to local session ability;
When UE2 receives the above-mentioned first session negotiation message sent by UE1, can choose the property parameters that the SDP message in the first session negotiation message received carries according to local session ability.
In the present embodiment, because UE2 only supports the speech data of G.729 encoding, do not support that RFC2833 encodes, possess the redundant ability of speech data.Therefore, UE2 chooses sound-type indication parameter and G.729 corresponding media encoding and decoding indication parameter (as PT value 18) from the SDP message received, then from SDP message, choose redundancy type indication parameter corresponding to speech data (if PT value is 96), redundancy encoding and decoding media encoding and decoding indication parameter (as PT value 18) G.729.
In above-mentioned choosing, UE2 does not support that RFC2833 encodes, therefore do not choose the media parameter (media encoding and decoding indication parameter that RFC2833 corresponding) relevant to RFC2833 and Media Redundancy parameter (the redundancy type indication parameter that RFC2833 coded data is corresponding and media encoding and decoding indication parameter corresponding to redundancy encoding and decoding RFC2833), in addition, although the redundant ability of UE2 support voice data, but because it does not support G.711A encoding and decoding, therefore G.711 corresponding also can not utilization carry out redundancy encoding to speech data, therefore do not choose the G.711A corresponding media encoding and decoding indication parameter of redundancy encoding and decoding.Can understand, in technical solution of the present invention, if UE2 supports RFC2833 codec data, but do not support the redundant ability of RFC2833 data, then UE2 will choose media parameter corresponding to RFC2833 coded data, but does not choose Media Redundancy parameter corresponding to RFC2833 coded data.
303, UE2 generates new SDP message according to the above-mentioned property parameters chosen;
After the process of terminal called execution of step 302, new SDP message can be generated according to the above-mentioned property parameters chosen.
304, the SDP message of above-mentioned generation is sent to above-mentioned UE1 by the second session negotiation message by UE2;
The SDP message of above-mentioned generation is sent to UE2 by the second session negotiation message by UE1 so that UE2 according to UE1 return SDP message set up or refresh and the session of this terminal called.
305, the SDP message in the second session negotiation message of returning according to UE2 of UE1 is set up or is refreshed and the session of UE2;
The SDP message foundation that UE2 can return according to UE1 or the session of refreshing and above-mentioned terminal called.
In embodiments of the present invention, when UE1 receives the SDP message that UE2 returns, can know that UE2 supports the speech data of G.729 encoding and the speech data redundancy of G.729 encoding, then it can be about to transmit the speech data of G.729 encoding in the session of setting up, and G.729 encodes to utilization and carry out redundancy to this speech data.
Can understand, if UE2 supports the redundant ability of RFC2833 coded data and RFC2833 data, then UE1 to being about to transmit the speech data and RFC2833 coded data of G.729 encoding in the session of setting up, and can carry out redundancy to these two kinds of data simultaneously.
Above-mentioned first session negotiation message and the second meeting negotiation message can be Session Initiation Protocol message, or also can be other end-to-end peer protocol message based on SDP agreement, are not construed as limiting herein.
It should be noted that, in the negotiations process of the Multimedia session of reality, above-mentioned UE1 may also can modify to other session parameter except above-mentioned property parameters in the SDP message received, the operations such as deletion, but due to this process belong to prior art and with the technical scheme not relating to the present invention and will set forth, therefore, the embodiment of the present invention is (such as to session duration when giving tacit consent to UE1 without the need to modifying to other session parameter in the SDP message received, the isoparametric retouching operation of redundancy progression), to the description that technical scheme of the present invention is carried out.
Therefore, the technical scheme that the embodiment of the present invention provides is expanded existing RFC2198 standard, make can state the redundant ability of media based on the message under SDP agreement simultaneously, thus calling terminal and terminal called can be held consultation to the redundant ability of media before new session in foundation or more simultaneously, and then solve existing only can the problem of single class media being carried out to redundancy in a session.
Be described for a kind of terminal realizing the machinery of consultation of above-mentioned Multimedia session in the embodiment of the present invention below, refer to Fig. 4, a kind of terminal that the embodiment of the present invention provides comprises:
Receiving element 401, for receiving the first session negotiation message from calling terminal;
Wherein, the property parameters that the SDP message in above-mentioned first session negotiation message carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media.
Choose unit 402, for choosing the property parameters that the SDP message received carries according to local session ability;
When receiving element 401 receives the SDP message from calling terminal, can trigger and choose unit 402 and according to local session ability (medium type, the media encoding and decoding of support, the redundant ability of the medium type of support and redundancy encoding and decoding etc. as supported), the property parameters (as media parameter, Media Redundancy parameter etc.) that the SDP message received carries is chosen.
In actual applications, when above-mentioned terminal is chosen media parameter, Media Redundancy parameter, particularly, choosing unit 402 can according to the medium type of this locality support and media coding/decoding capability, corresponding media parameter (as the medium type indication parameter corresponding with the medium type that this locality is supported, the media encoding and decoding indication parameter corresponding with local media coding/decoding capability) is chosen from the SDP message received; According to the redundant ability of the media coding/decoding capability of this locality and the medium type of support, from the SDP message received, choose corresponding Media Redundancy parameter, as redundancy type indication parameter and media encoding and decoding indication parameter etc. corresponding to redundancy encoding and decoding.
It can be Session Initiation Protocol message that above-mentioned first session negotiation disappears, or also can be other end-to-end peer protocol message based on SDP agreement, is not construed as limiting herein.
Generation unit 403, for according to choosing the property parameters that unit 402 chooses, generates new SDP message;
Transmitting element 404, sends to above-mentioned calling terminal for the SDP message generated by generation unit 403 by the second session negotiation message.
Above-mentioned second meeting negotiation message can be Session Initiation Protocol message, or also can be other end-to-end peer protocol message based on SDP agreement, is not construed as limiting herein.
It should be noted that, the terminal of the present embodiment can as the terminal called in above-mentioned embodiment of the method, may be used for the whole technical schemes realized in said method embodiment, the function of its each functional module can according to the method specific implementation in said method embodiment, its specific implementation process can refer to the associated description in above-described embodiment, repeats no more herein.
Be described for the another kind of terminal realizing the machinery of consultation of above-mentioned Multimedia session in the embodiment of the present invention below, refer to Fig. 5, a kind of terminal that the embodiment of the present invention provides comprises:
Transmitting element 501, for sending conversation initialized protocol first session negotiation message to terminal called;
Wherein, the property parameters that the Session Description Protocol SDP message in above-mentioned first session negotiation message carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media; Above-mentioned media parameter includes but not limited to medium type indication parameter, media encoding and decoding indication parameter; Above-mentioned Media Redundancy parameter includes but not limited to the media encoding and decoding indication parameter that redundancy type indication parameter, redundancy encoding and decoding are corresponding.Wherein, the value of above-mentioned redundancy type indication parameter, media encoding and decoding indication parameter can be the PT value mapped mutually with various media encoding and decoding and redundancy encoding and decoding.
Receiving element 502, for receiving the second session negotiation message that above-mentioned terminal called returns;
Dialog processing unit 503, for the SDP message in the second session negotiation message of receiving according to receiving element 502, sets up or refreshes and the session of above-mentioned terminal called;
Above-mentioned first session negotiation message and the second meeting negotiation message can be Session Initiation Protocol message, or also can be other end-to-end peer protocol message based on SDP agreement, are not construed as limiting herein.
The SDP message foundation that Dialog processing unit 503 can return according to terminal called or the session of refreshing and above-mentioned terminal called, if still include the Media Redundancy parameter of two or more media in the SDP message that terminal called returns, then the media transmitted in the session that above-mentioned terminal can be set up Dialog processing unit 503 or upgrade carries out redundancy simultaneously.
It should be noted that, the terminal of the present embodiment can as the calling terminal in above-mentioned embodiment of the method, may be used for the whole technical schemes realized in said method embodiment, the function of its each functional module can according to the method specific implementation in said method embodiment, its specific implementation process can refer to the associated description in above-described embodiment, repeats no more herein.
Therefore, the technical scheme that the embodiment of the present invention provides is expanded existing RFC2198 standard, make can state the redundant ability of media based on the message under SDP agreement simultaneously, thus calling terminal and terminal called can be held consultation to the redundant ability of media before new session in foundation or more simultaneously, and then solve existing only can the problem of single class media being carried out to redundancy in a session.
Be described the Multimedia session system in the embodiment of the present invention below, refer to Fig. 6, the Multimedia session system in the embodiment of the present invention comprises:
First terminal 601 and the second terminal 602;
Wherein, first terminal 601 is for sending the first session negotiation message to the second terminal 602, and wherein, the property parameters that the SDP message in the first session negotiation message carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media; Receive the second session negotiation message that the second terminal 602 returns, and set up according to the SDP message in the second session negotiation message received or refresh and the session of the second terminal 602.
In actual applications, when first terminal 601 is to the second terminal 602 initiation session, the media parameter of medium type corresponding for the media data of pre-transmission (can comprise one or more media) can be encapsulated in SDP message by it.Wherein, above-mentioned media parameter includes but not limited to medium type indication parameter, media encoding and decoding indication parameter, the media encoding and decoding that above-mentioned media encoding and decoding indication parameter can indicate a kind of first terminal 601 to support, first terminal 601 can carry multiple media encoding and decoding indication parameter, to make above-mentioned second terminal 602 when receiving the SDP message that first terminal 601 sends, know the media encoding and decoding that first terminal 601 is supported.Further, if first terminal 601 supports the redundant ability of above-mentioned medium type, also can corresponding Media Redundancy parameter be also encapsulated in this SDP message, by the first session negotiation message, above-mentioned SDP message be sent to the second terminal 602.
Wherein, the second terminal 602 is for receiving 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 Media Redundancy parameter of at least two kinds of media; According to local session ability, the property parameters that the SDP message received carries is chosen; New SDP message is generated according to the above-mentioned property parameters chosen; The SDP message of above-mentioned generation is sent to first terminal 601 by the second session negotiation message.In actual applications, when the second terminal 602 pairs of media parameter, Media Redundancy parameter are chosen, the medium type that second terminal 602 can be supported according to this locality and media coding/decoding capability, corresponding media parameter (as the medium type indication parameter corresponding with the medium type that this locality is supported, the media encoding and decoding indication parameter corresponding with local media coding/decoding capability) is chosen from the SDP message received; According to the redundant ability of the media coding/decoding capability of this locality and the medium type of support, from the SDP message received, choose corresponding Media Redundancy parameter, as redundancy type indication parameter and media encoding and decoding indication parameter etc. corresponding to redundancy encoding and decoding.
Above-mentioned first session negotiation message and the second meeting negotiation message can be Session Initiation Protocol message, or also can be other end-to-end peer protocol message based on SDP agreement, are not construed as limiting herein.
It should be noted that, the first terminal 601 of the present embodiment can as the calling terminal in above-mentioned embodiment of the method, second terminal 602 of the present embodiment can as the terminal called in above-mentioned embodiment of the method, it all may be used for the whole technical schemes realized in said method embodiment, the function of its each functional module can according to the method specific implementation in said method embodiment, its specific implementation process can refer to the associated description in above-described embodiment, repeats no more herein.
Therefore, the technical scheme that the embodiment of the present invention provides is expanded existing RFC2198 standard, make can state the redundant ability of media based on the message under SDP agreement simultaneously, thus calling terminal and terminal called can be held consultation to the redundant ability of media before new session in foundation or more simultaneously, and then solve existing only can the problem of single class media being carried out to redundancy in a session.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, random asccess memory, disk or CD etc.
Above the machinery of consultation of Multimedia session provided by the present invention, relevant device and system are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, to sum up, this description should not be construed as limitation of the present invention.
Claims (10)
1. a machinery of consultation for 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 described first session negotiation message carries comprises the media parameter of at least two kinds of media and the Media Redundancy parameter of described at least two kinds of media;
The media parameter of at least two kinds of media that terminal called carries the described SDP message received according to local session ability and the Media Redundancy parameter of described at least two kinds of media are chosen;
Terminal called according to described in the media parameter chosen and Media Redundancy parameter generate new SDP message;
The SDP message of described generation is sent to described calling terminal by the second session negotiation message by terminal called.
2. method according to claim 1, is characterized in that,
Described terminal called to be chosen the property parameters that the described SDP message received carries according to local session ability and is specially:
The medium type that terminal called is supported according to this locality and media coding/decoding capability, from the described SDP message received, choose corresponding media parameter, described media parameter comprises medium type indication parameter and media encoding and decoding indication parameter;
Terminal called is according to the redundant ability of the media coding/decoding capability of this locality and the medium type of support, from the described SDP message received, choose corresponding Media Redundancy parameter, described Media Redundancy parameter comprises redundancy type indication parameter and media encoding and decoding indication parameter corresponding to redundancy encoding and decoding.
3. method according to claim 2, is characterized in that,
The value of described media encoding and decoding indication parameter is specially load type PT value corresponding to described media encoding and decoding;
And/or the value of described redundancy type indication parameter is specially load type PT value corresponding to described redundancy type.
4. according to the method in any one of claims 1 to 3, it is characterized in that,
Described first session negotiation message is specially Session initiation protocol SIP message or is the end-to-end peer protocol message based on SDP agreement;
Described second session negotiation message is specially Session initiation protocol SIP message or is the end-to-end peer protocol message based on SDP agreement.
5. a terminal, is characterized in that, comprising:
Receiving element, for receiving the first session negotiation message from calling terminal, the property parameters that the Session Description Protocol SDP message in described first session negotiation message carries comprises the media parameter of at least two kinds of media and the Media Redundancy parameter of described at least two kinds of media;
Choose unit, choose for the media parameter of at least two kinds of media of carrying the described SDP message received according to local session ability and the Media Redundancy parameter of described at least two kinds of media;
Generation unit, for choosing media parameter and the Media Redundancy parameter of unit selection described in basis, generates new SDP message;
Transmitting element, sends to described calling terminal for the SDP message generated by described generation unit by the second session negotiation message.
6. terminal according to claim 5, is characterized in that,
Described choose unit specifically for, according to this locality support medium type and media coding/decoding capability, from the described SDP message received, choose corresponding media parameter, described media parameter comprises medium type indication parameter and media encoding and decoding indication parameter; According to the redundant ability of the media coding/decoding capability of this locality and the medium type of support, from the described SDP message received, choose corresponding Media Redundancy parameter, described Media Redundancy parameter comprises redundancy type indication parameter and media encoding and decoding indication parameter corresponding to redundancy encoding and decoding.
7. a terminal, is characterized in that, comprising:
Transmitting element, for sending the first session negotiation message to terminal called, the property parameters that the Session Description Protocol SDP message in described first session negotiation message carries comprises media parameter and the Media Redundancy parameter of at least two kinds of media;
Receiving element, for receiving the second session negotiation message that described terminal called returns;
Dialog processing unit, for the SDP message in the second session negotiation message of receiving according to described receiving element, sets up or refreshes and the session of described terminal called.
8. terminal according to claim 7, it is characterized in that, when described Dialog processing unit also for carrying the Media Redundancy parameter of two or more media in described second session negotiation message, redundancy is carried out to the media transmitted in the session of described foundation or renewal.
9. a Multimedia session system, is characterized in that, comprising:
First terminal and the second terminal;
Described first terminal is used for sending the first session negotiation message to described second terminal, and the property parameters that the Session Description Protocol SDP message in described first session negotiation message carries comprises the media parameter of at least two kinds of media and the Media Redundancy parameter of described at least two kinds of media; Receive the second session negotiation message that described second terminal returns, and set up according to the SDP message in described second session negotiation message or refresh and the session of described second terminal;
Described second terminal is for receiving the first session negotiation message from described first terminal, and the property parameters that the SDP message in described first session negotiation message carries comprises the media parameter of at least two kinds of media and the Media Redundancy parameter of described at least two kinds of media; The media parameter of at least two kinds of media comprised the described SDP message received according to local session ability and the Media Redundancy parameter of described at least two kinds of media are chosen; New SDP message is generated according to the described media parameter chosen and Media Redundancy parameter; The SDP message of described generation is sent to described first terminal by the second session negotiation message.
10. system according to claim 9, is characterized in that,
When described first terminal also for carrying the Media Redundancy parameter of two or more media in described second session negotiation message, redundancy is carried out to the media transmitted in the session of described foundation or renewal.
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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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| CN102984493B (en) * | 2012-11-21 | 2016-03-02 | 华为终端有限公司 | The method of video data transmission, device and communication equipment |
| CN105847225B (en) * | 2015-01-16 | 2019-02-05 | 中国移动通信集团公司 | Encrypted negotiation method and device end to end based on IP multimedia subsystem |
| CN106254354B (en) * | 2016-08-10 | 2019-04-26 | 东北大学 | A kind of SDP negotiation method of asymmetric media parameter |
| CN111193941B (en) * | 2020-01-07 | 2021-09-17 | 北京东土科技股份有限公司 | Method, device and equipment for transmitting media data and storage medium |
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| CN101247388A (en) * | 2007-02-15 | 2008-08-20 | 华为技术有限公司 | Method and system for negotiating media and method for transmitting media description information |
| CN101316385A (en) * | 2007-05-30 | 2008-12-03 | 华为技术有限公司 | Conversation description protocol negotiation method and correlated equipment |
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| US7656861B2 (en) * | 2004-07-09 | 2010-02-02 | Cisco Technology, Inc. | Method and apparatus for interleaving text and media in a real-time transport session |
| CN100542177C (en) * | 2006-11-06 | 2009-09-16 | 华为技术有限公司 | A kind of machinery of consultation and system |
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| CN101316385A (en) * | 2007-05-30 | 2008-12-03 | 华为技术有限公司 | Conversation description protocol negotiation method and correlated equipment |
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