CN1968111A - Method for realizing quick start of multimedia communication - Google Patents
Method for realizing quick start of multimedia communication Download PDFInfo
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- CN1968111A CN1968111A CN 200610021784 CN200610021784A CN1968111A CN 1968111 A CN1968111 A CN 1968111A CN 200610021784 CN200610021784 CN 200610021784 CN 200610021784 A CN200610021784 A CN 200610021784A CN 1968111 A CN1968111 A CN 1968111A
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Abstract
The invention relates to a method for realizing multimedia communication quick start in H.323 multimedia communication system, wherein said method comprises that: a, caller sets quick start mark; b, caller builds block start message for call and opens relative quick start channel; c, caller sends call build message with quick start block; d, called user checks if it supports quick start, sets quick start mark; if support, entering into step e, or else, rejecting said call; e, called user checks if there is channel met with caller, if there is, entering into step f; or else, rejecting said call; f, called user sends prompt message and sends the connecting message with quick start block; g, caller receives the connecting message, and builds quick start. The invention has the advantages that: multimedia communication quick start can simplify the process and reduce transmission delay.
Description
Technical field
The present invention relates to a kind of implementation method of multimedia communication service, be specifically related to a kind of implementation method of the quick start of multimedia communication in multimedia communications system H.323.
Background technology
Usually, the implementation method of the multimedia communication call setup flow process in multimedia communications system H.323 adopts as shown in Figure 1, set up through calling, called prompting, connect to set up after, also through caller, called both sides' capabilities exchange request, capabilities exchange request response, open the logical channel request message, open H.245 process such as logical channel request response.
In real-time multimedia communication, the delay that the user connects audio frequency and video is very sensitive, reduces to postpone, and can effectively improve user's experience.Can improve product competitiveness for businessman.Start flow process more as can be known soon by having adopted fast startup flow process and not adopted, adopt and open information mutual between the terminal of flow process soon and want much less, and the delay that begins audio/video flow after connecting is mainly by these ability comparisons of transmission with open the messages affect of passage.The fast flow process that starts need not transmit these message, makes the delay of communication process reduce, and the flow by network also reduces, and is all useful for Virtual network operator and the user that charges by flow.
At present, H.323 communication protocol flow is very complicated, and the realization of each producer is variant, has increased difficulty for interconnecting, and adopts method such as fast startup to simplify its communication process, to the development of multimedia communication highly significant.
Summary of the invention
The technical problem to be solved in the present invention is that a kind of implementation method of quick start of multimedia communication is provided.
The present invention addresses the above problem the technical scheme that is adopted to be: a kind of implementation method of quick start of multimedia communication may further comprise the steps:
The a caller is provided with fast startup flag bit;
The b caller is the fast initiation message structure of call setup and opens relative quick start channel;
The c caller sends the call setup message that includes fast startup piece;
The call setup message of the called reception of d has fast startup piece, sends reminder message to caller, and detects oneself and whether support fast startup, and fast startup flag bit is set; If enter step e; If not, refuse this calling;
The called capability set of e according to the local terminal, whether have the passage that meet calling connection, if enter step f if detecting; If not, refuse this calling;
The called transmission of f includes the connection message of fast startup piece;
After called connection message was received in the g caller, the fast startup set up, and caller sends and receiving media stream by the passage of called selection.
In the step g, fast start set up after, when H.245 calling features was used in caller or called requirement, the side of requirementing switched to the multimedia passage by on the media channel of H.245 controlling.
Fast initiation message structure comprises a plurality of combination passages, and each combination passage comprises optional sendaisle, optional gating road, the combination channel data type accepted; Described combination passage comprises a voice-grade channel at least, a video channel.
Optional sendaisle, the optional passage of accepting all comprise a plurality of fast unblanks road, and each passage is by its passage name, RTP address, RTCP address, dtd.
The fast startup piece of call setup message comprises the logical channel of opening with prioritization, and each is opened logical channel and is made of optional sendaisle in the fast initiation message and the optional gating road of accepting.
The invention has the beneficial effects as follows that quick start of multimedia communication reduces video, audio message transmission delay by simplifying the communication process of Multimedia Message, promote user's audiovisual sense organ.
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 is common multimedia communication call setup flow process;
Fig. 2 is the quick start of multimedia communication flow process based on H.323;
Fig. 3 is the data structure of fast initiation message: fast initiation message;
Fig. 4 starts block structure soon for caller;
Fig. 5 is called fast startup block structure.
Embodiment
H.323 in the consensus standard of ITU-T issue, fast startup flow process done be described in detail as follows: connection procedure allows end points to set up a basic point to point call with the least possible message back and forth fast, makes Media Stream can be immediately connect transmission calling out.Calling endpoint is initiated quick connection procedure by sending the call setup message that comprises fast startup piece to the called end point.The called end point just can begin to send medium after transmission comprises the Q.931 message of fast startup; Calling endpoint just can get started the transmission medium when receiving the Q.931 message that comprises fast startup.
Realize the fast requirements of process expansion call setup message that starts, do not increase new message and process, existing ripe H.323 communication system almost can both be supported fast start-up course, but implementation method has nothing in common with each other.The present invention describes the implementation method based on H.323 quick start of multimedia communication at this, has defined the structure of the fast initiation message of quick start of multimedia communication, and caller starts block structure soon, called fast startup block structure.
One, caller starts flow process soon, as shown in Figure 2:
1) fast startup sign is set;
2) be the fast initiation message structure of call setup and open relative quick start channel;
According to local capability set and simultaneously capability set make up the fast startup RTP session channel of Voice ﹠ Video respectively and with the reference record of these passages in fast initiation message;
Wherein, fast initiation message structure, as shown in Figure 3:
A fast message that starts can comprise the several combinations passage, has two combinations of Voice ﹠ Video passage at least, other as data and non-standardly wait that to make up passage optional.And transmission is arranged and accept two kinds of interchange channels in each combination passage, and have this combination channel type definition.Comprise several fast passages that starts in the interchange channel, each such passage all has its name, call number, attributes such as RTP transport address, RTCP transport address, data type handle.RTP address, RTCP address all include its address properties, enumerate attributes such as class, distribution type, route as length, IP value, port, address.
According to the fast startup channel parameters in the fast initiation message, open corresponding fast unblank road and prepare receiving media stream.
Accept the possibility of connection fast if calling endpoint requires to increase, it should propose many to optional capability set passage.
3) calling terminal is initiated quick connection procedure by sending the call setup message that comprises fast startup piece to the called end point.The fast startup block structure of the call setup message of its calling terminal is as shown in Figure 4:
To be end application come by the call setup message format conversion coding of system H.323 according to the structure of fast initiation message and content this structure.
Caller starts piece soon and comprises 6 projects, and each project comprises one and opens logical channel, and each is opened logical channel and is made of the optional passage in the fast initiation message.Open logical channel and propose to be included in the fast startup piece with preferred order, preference is in first of fast initiating sequence; The proposal of opening voice-grade channel must be in the front of other any medium type.Wherein open logical channel and comprise forward direction logical channel parameter, reverse logic channel parameters; Forward direction, reverse logic channel parameters comprise its data type, multiplexing parameters; Wherein include H.255.0 protocol stack definition logical channel parameter in the multiplexing parameters, constitute by a plurality of media channels; Each media channel comprises its unicast address IP address; The IP address comprises its network ip address, information such as TSAP sign.
The Q.931 message that comprises fast startup is sent out as the response of call setup message, wherein each to open logical channel be acceptable proposal media channel, and indicate this channel to set up and can be used for medium immediately and send.
Opening in the logical channel of transmission channel from the calling endpoint to the called end point, forward direction logical channel parameter block must comprise the parameter that regulation is proposed the characteristic of channel, the optional proposal of other of same transmitting channel must comprise identical item id value in H.225.0 opening the logical channel parameter.The media channel piece must omit in proposal, provides whether accept this proposal by the called end point.
4) just wait to receive behind the called connection message and to send on the passage of selecting by the other side and receiving media flows.
5) after using quick connection procedure foundation calling, both sides' end points can determine whether need to use the H.245 calling features of process, can switch to by H.245 controlling media channel.
When using quick connection procedure to set up to call out when connecting, Q.931 both sides' end points all must keep call signaling channel to open, and stops or set up independent H.245 connection up to calling out.
6) end of calling.
Two, called response starts flow process soon, as shown in Figure 2:
1) called party to calling party sends reminder message, represents called ring, and checks whether the call setup message that receives has fast startup piece, detects oneself and whether supports fast startup, and fast startup flag bit is set.
2), and revise local express and start piece according to the passage of all requests of capability set automatic-answering back device of local terminal.If can find the passage that meets then continue following flow process, if can not find then refuse this calling.
Called fast startup block structure as shown in Figure 5.Its structure is similar to the fast startup block structure of called call setup message, the fast startup block structure of called call setup message comprises 2 projects, each project comprises one and opens logical channel, and each is opened logical channel and is made of the optional passage in the fast initiation message.
The called end point begins media delivery during the stage in the preparation of receiving the call setup message that comprises fast startup, wish to carry out quick connection procedure and proceeding to connection procedure, it must be selected from the opening the logical channel structure of reverse logic channel parameters piece that comprise that is proposed at each medium type that will send, and the medium type that it will receive at each is selected from the opening the logical channel structure of forward direction logical channel parameter block (omitting reverse logic channel parameters piece) that comprise that is proposed.If optional proposal exists, then from each option set (wherein each option has identical item id), must can only select one and open the logical channel structure.The called end point by any Q.931 message (to call setup until and comprise the response of connection) in return and open the channel that the logical channel structure is accepted to propose accordingly.Media Stream can not selected to open in specific direction or for specific medium type in the called end point, and this does not comprise by the fast startup piece in response Q.931 opens the logical channel structure accordingly and realize.
3) notify the user to have calling to enter.
4) if the user accepts this to be called out, then send the fast connection message that starts piece of band, this starts piece soon and comprises accepted channel parameters.If the user refuses then forwards 5 to); If the user does not support or refuses quick connection procedure, should in any Q.931 message, not return fast startup piece, require calling and called to carry out capabilities exchange and open media channel with process H.245.
5) end of calling.
Local side apparatus between multimedia communication platform calling and called does not need to do special change and supports fast startup.
Claims (5)
1, a kind of implementation method of quick start of multimedia communication is characterized in that, may further comprise the steps:
A, caller are provided with fast startup flag bit;
B, caller are the fast initiation message of call setup and open relative quick start channel;
C, caller send the call setup message that includes fast startup piece;
D, called party to calling party send reminder message, and detect oneself and whether support fast startup, and fast startup flag bit is set; If enter step e; If not, refuse this calling;
E, called capability set according to the local terminal, whether have the passage that meet calling connection, if enter step f if detecting; If not, refuse this calling;
F, called transmission include the connection message of fast startup piece;
After called connection message was received in g, caller, the fast startup set up, and caller sends and receiving media stream by the passage of called selection.
2, the implementation method of a kind of quick start of multimedia communication as claimed in claim 1, it is characterized in that, in the step g, the fast startup after the foundation, when H.245 calling features was used in caller or called requirement, the side of requirementing switched to the multimedia passage by on the media channel of H.245 controlling.
3, the implementation method of a kind of quick start of multimedia communication as claimed in claim 1 is characterized in that, described fast initiation message comprises a plurality of combination passages, comprises a voice-grade channel at least, a video channel; Each combination passage comprises optional sendaisle, optional gating road, the combination channel data type accepted.
4, the implementation method of a kind of quick start of multimedia communication as claimed in claim 3, it is characterized in that, described optional sendaisle, the optional passage of accepting all comprise a plurality of fast unblanks road, and each passage is by its passage name, RTP address, RTCP address, dtd.
5, the implementation method of a kind of quick start of multimedia communication as claimed in claim 4, it is characterized in that, the fast startup piece of call setup message, comprise the logical channel of opening with prioritization, each is opened logical channel and is made of optional sendaisle in the fast initiation message and the optional gating road of accepting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610021784 CN1968111A (en) | 2006-09-07 | 2006-09-07 | Method for realizing quick start of multimedia communication |
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| CN 200610021784 CN1968111A (en) | 2006-09-07 | 2006-09-07 | Method for realizing quick start of multimedia communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221868A (en) * | 2020-09-03 | 2022-03-22 | 迈络思科技有限公司 | Improving port connection time |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221868A (en) * | 2020-09-03 | 2022-03-22 | 迈络思科技有限公司 | Improving port connection time |
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Open date: 20070523 |