CN103384247A - Video multicast achieving method based on session initiation protocol (SIP) monitoring system - Google Patents
Video multicast achieving method based on session initiation protocol (SIP) monitoring system Download PDFInfo
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Abstract
The invention provides a video multicast achieving method based on a session initiation protocol (SIP) monitoring system. The video multicast achieving method includes: when media streams between SIP monitoring client sides and IP cameras (IPCs) are transferred by a server and the first SIP monitoring client side is connected with one IPC through the server, the second SIP monitoring client side is assumed to monitor the IPC and transmit INVITE requests; the server preferably confirms authority of the second SIP monitoring client side, if the second SIP monitoring client side is authorized, media ports are distributed to the server directly through media services, and the server provides 2000K response; the second SIP monitoring client side responds to ACK, then RTP streams are built between the second SIP monitoring client side and the server, and the server is responsible for forwarding IPC audio/video streams to the first SIP monitoring client side and the second SIP monitoring client side. By means of the video multicast achieving method based on the SIP monitoring system, a plurality of users can look over one IPC at the same time, and the monitoring quality can be ensured.
Description
Technical field
The present invention relates to a kind of communication and areas of information technology, be specifically related to a kind of Video Multicast implementation method based on the SIP supervisory control system.
Background technology
The characteristics such as at present, SIP (Session Initiation Protocol) agreement is open by means of it, and is flexible, and autgmentability is strong have become the consensus standard that IP network is communicated by letter, and especially at NGN, play the part of the core protocol role in the IMS network.Moreover, SIP also replaces some other agreement gradually, becomes the consensus standard of supervisory control system.We know, the primary video monitor session is substantially similar with an audio frequency and video session, the former can be considered the latter's subset, main difference is, audio/video communication is that two-way audio and video stream and video monitoring only have the video flowing (audio stream can be two-way) from the camera to the monitoring client. a typical SIP supervisory control system and a SIP audio frequency and video telephone system are also basically identical.
In the practical application of supervisory control system, there is such demand, a plurality of exactly users check that simultaneously an IPC (IP Camera) is according to the call flow of Session Initiation Protocol.Each client can be set up a session with IPC, and this makes on IPC can transmit multipath media stream simultaneously, for IPC, is difficult to reply on performance, and as accessing terminal, transmission bandwidth also is difficult to guarantee simultaneously.These will cause whole video monitor quality greatly to reduce.For fear of this class situation, some IPC only allows one tunnel video session, if when the second road video monitor request is arranged, it can provide 486 responses, is refused, and tells opposite end IPC just busy; Some can enter the Call Waiting flow process.And these methods can not solve practical application request.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Video Multicast implementation method based on the SIP supervisory control system, can realize that a plurality of users check an IPC simultaneously, and can guarantee to monitor quality.
The present invention is achieved in that a kind of Video Multicast implementation method based on the SIP supervisory control system, and described SIP supervisory control system comprises server, IPC and at least two SIP monitor clients, and described server comprises again the service of SIP signaling and media services; It is characterized in that: described Video Multicast implementation method comprises following A, B, three kinds of situations of C:
Media Stream between A, SIP monitor client and IPC is during via transit server, and after a SIP monitor client and an IPC connect by server, supposes that this moment, the 2nd SIP monitor client will monitor this IPC, and send the INVITE request;
The first-selected authority of confirming the 2nd SIP monitor client of steps A 1, server, if having the right, this moment server directly by media services allocation medium port, and provide the 200OK response;
Suppose a SIP monitor client, the 2nd SIP monitor client, the IP address of the media services of IPC and server is respectively: IP1, IP2, IP3, IP4; The one SIP monitor client, the 2nd SIP monitor client monitors IPC simultaneously, 6 RTP of audio frequency and video supervision are connected to:
The one SIP monitor client:
Audio stream: ip1/portA1＜-〉 ip4/portA4-1;
Video flowing: ip1/portV1＜-〉 ip4/portV4-1;
The 2nd SIP monitor client:
Audio stream: ip2/portA2＜-〉 ip4/portA4-2;
Video flowing: ip2/portV2＜-〉 ip4/portV4-2;
IPC:
Audio stream: ip3/portA3＜-〉 ip4/portA4-3;
Video flowing: ip3/portV3＜-〉 ip4/portV4-3;
B, set up session with the SIP monitor client as IPC, and Media Stream is direct-connected, and after a SIP monitor client and an IPC connect by server, supposes that this moment, the 2nd SIP monitor client will monitor this IPC, and initiate INVITE;
Step B1, server check the session status of IPC, first reply the 2nd SIP monitor client 100Trying;
Step B2, server are initiated Re-Invite to a SIP monitor client and IPC simultaneously; In the SDP that carries, media address is the IP address of media services and the echo port of distribution, redirects on media server with the media with a SIP monitor client and IPC;
Step B3, a SIP monitor client and IPC provide the 200OK response;
Step B4, server send the ACK confirmation message to a SIP monitor client and IPC respectively;
Step B5, simultaneously providing the 200OK response to the 2nd SIP monitor client, to carry the media address information of SDP be IP address and the port of media server;
Step B6, the 2nd SIP monitor client provide ACK; So far, whole system is completed the switching of Media Stream;
The dismounting of C, session: entered the Video Multicast pattern at a SIP monitor client, the 2nd SIP monitor client and an IPC, and hypothesis the one SIP monitor client this moment withdraws from;
Step C1, a SIP monitor client send BYE;
On step C2, server judgement IPC, the two-way session is arranged, therefore can not hang up IPC, it directly responds 200OK, simultaneously the media link between dismounting and a SIP monitor client; At this moment, the session of the 2nd SIP monitor client and IPC is proceeded;
Step C3, the 2nd SIP monitor client withdraw from, and send BYE;
Session on step C4, service judgement IPC is all withdrawed from, and therefore sends BYE to IPC;
The bye of IPC is received in step C5, service; Send 200OK for the 2nd SIP monitor client, so far session is all removed.
Further, a described SIP monitor client and the 2nd SIP monitor client have the function of propagandaing directed to communicate and when propagandaing directed to communicate simultaneously, media services at described server increase the stereo process module, after mixing the audio stream from a SIP monitor client and the 2nd SIP monitor client, are sent to IPC; Perhaps the described server client that only allows to obtain microphone is propagandaed directed to communicate, and realizes by expansion SIP INFO, MESSAGE message.
The present invention has following advantage: the present invention has well solved the application demand that a plurality of SIP monitor clients monitor an IPC simultaneously, whole calling control and distribution of media and media processing etc. are all completed by server, Service control is flexible. for terminal, need not extra realization, just can support this application, compatible strong.
Description of drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the structural representation of typical SIP supervisory control system.
Fig. 2 is the process chart that the inventive method the first adds the supervision situation.
Fig. 3 is the RTP connection diagram that the inventive method the first adds the supervision situation.
Fig. 4 is the process chart that the inventive method the second adds the supervision situation.
Fig. 5 is the process chart of the inventive method session teardown situation.
Embodiment
As shown in Figure 1, be a kind of structural representation of typical SIP supervisory control system, it mainly contains 3 class roles and forms:
Server, the core of whole system consists predominantly of the service of SIP signaling and media services, and it is responsible for realizing endpoint registration, authentication, session route and management, and the functions such as transfer of Media Stream.
IPC is exactly the IP camera, and it is also SIP UA.And the audio frequency and video compressed encoding that gathers can be transmitted by RTP, can play the audio frequency and video rtp streaming that the opposite end transmits simultaneously.
The SIP monitor client is also a SIP UA, and it can receive the RTP audio/video flow of IPC, and the decoding broadcast, has in the supervisory control system of the function of propagandaing directed to communicate at some simultaneously, and supervisor's sound collection can also be encoded and is packaged into rtp streaming is transferred to IPC.
In the application of reality, described server can be an equipment, can be also the set of some equipment, wherein media server(media services), the service of SIP server(SIP signaling) can be man-to-man relation, it can be also the relation of multi-to-multi, wherein database can be arranged, authentication, storage server etc., but this does not affect content of the present invention, description the present invention for simplicity, we are referred to as a logic entity of realizing aforementioned all functions with server.
It is in said system, have the design of P2P due to some system, therefore exist Media Stream between terminal via transit server and direct-connected two kinds of situations, thus, Video Multicast implementation method of the present invention comprises following A, B, three kinds of situations of C, and wherein, A and B are after a SIP monitor client and an IPC connect by server, the situation that adds again a SIP monitor client, and C is the situation of session teardown:
A, as shown in Figure 2, the Media Stream between SIP monitor client and IPC be during via transit server,
At first a SIP monitor client and IPC1 are as follows by the process that server connects:
1, a SIP monitor client is initiated the INVITE request, calls out IPC1;
2, after server is confirmed the authority of a SIP monitor client, provide 100TRYING;
3, server is initiated the INVITE request to IPC1 simultaneously, and wherein SDP carries IP and the port of media services;
4, IPC1 provides the 200OK response;
5, server to a SIP monitor client, is replied 200OK, and what SDP carried is the IP of media services and the port of distribution;
6, a SIP monitor client sends ACK.So far the monitor session of a SIP monitor client and IPC1 is set up, and the Media Stream between a SIP monitor client and IPC1 is via the transit server intercommunication.
At this moment, suppose that this moment, the 2nd SIP monitor client will monitor this IPC1, and send the INVITE request, processing method of the present invention is carried out in the steps below;
The first-selected authority of confirming the 2nd SIP monitor client of steps A 1, server, if having the right, this moment server directly by media services allocation medium port, and provide the 200OK response;
As shown in Figure 3, be the path profile of above-mentioned Media Stream, suppose a SIP monitor client, the 2nd SIP monitor client, the IP address of the media services of IPC1 and server is respectively: IP1, IP2, IP3, IP4; The one SIP monitor client, the 2nd SIP monitor client monitors IPC1 simultaneously, 6 RTP of audio frequency and video supervision are connected to:
The one SIP monitor client:
Audio stream: ip1/portA1＜-〉 ip4/portA4-1;
Video flowing: ip1/portV1＜-〉 ip4/portV4-1;
The 2nd SIP monitor client:
Audio stream: ip2/portA2＜-〉 ip4/portA4-2;
Video flowing: ip2/portV2＜-〉 ip4/portV4-2;
IPC1:
Audio stream: ip3/portA3＜-〉 ip4/portA4-3;
Video flowing: ip3/portV3＜-〉 ip4/portV4-3;
Some details that should be noted that:
Because monitoring is used, it is unidirectional video communication.Monitoring client is slightly different for processing and the audio frequency and video conversation of audio/video flow.Wherein, for video flowing, monitoring client can not send video flowing, if after monitoring client is positioned at NAT, monitoring client must initiatively outwards send the packet of some after session establishment, and purpose is to get through the NAT link.For the audio frequency media link, in like manner, a described SIP monitor client and the 2nd SIP monitor client have the function of propagandaing directed to communicate and when propagandaing directed to communicate simultaneously, media services at described server increase the stereo process module, after the audio stream of mixing from a SIP monitor client and the 2nd SIP monitor client, be sent to IPC; Perhaps the described server client that only allows to obtain microphone is propagandaed directed to communicate, and the methods such as the INFO by expansion SIP or MESSAGE realize.
B, set up session with the SIP monitor client as IPC, and Media Stream is when being direct-connected.
As shown in Figure 4, at first a SIP monitor client and IPC1 connect by server, step 1 in its connection procedure and A～6 one to, will not repeat herein, after a SIP monitor client and an IPC connect by server, suppose that this moment, the 2nd SIP monitor client will monitor this IPC, and initiate INVITE; Processing method of the present invention is carried out in the steps below:
Step B1, server check the session status of IPC, first reply the 2nd SIP monitor client 100Trying;
Step B2, server are initiated Re-Invite to a SIP monitor client and IPC simultaneously; In the SDP that carries, media address is the IP address of media services and the echo port of distribution, redirects on media server with the media with a SIP monitor client and IPC;
Step B3, a SIP monitor client and IPC provide the 200OK response;
Step B4, server send the ACK confirmation message to a SIP monitor client and IPC respectively;
Step B5, simultaneously providing the 200OK response to the 2nd SIP monitor client, to carry the media address information of SDP be IP address and the port of media server;
Step B6, the 2nd SIP monitor client provide ACK; So far, whole system is completed the switching of Media Stream;
The dismounting of C, session:
As shown in Figure 5, entered the Video Multicast pattern at a SIP monitor client, the 2nd SIP monitor client and an IPC, and hypothesis the one SIP monitor client this moment withdraws from;
Step C1, a SIP monitor client send BYE;
On step C2, server judgement IPC, the two-way session is arranged, therefore can not hang up IPC, it directly responds 200OK, simultaneously the media link between dismounting and a SIP monitor client; At this moment, the session of the 2nd SIP monitor client and IPC is proceeded;
Step C3, the 2nd SIP monitor client withdraw from, and send BYE;
Session on step C4, service judgement IPC is all withdrawed from, and therefore sends BYE to IPC;
The BYE of IPC is received in step C5, service, sends 200OK for the 2nd SIP monitor client, and so far session is all removed.
As above, the present invention has well solved the application demand that a plurality of SIP monitor clients monitor an IPC simultaneously, whole calling control and distribution of media and media processing etc. are all completed by server, Service control is flexible. for terminal, need not extra realization, just can support this application, compatible strong.
Although more than described the specific embodiment of the present invention; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; rather than for the restriction to scope of the present invention; those of ordinary skill in the art are in modification and the variation of the equivalence of doing according to spirit of the present invention, all should be encompassed in the scope that claim of the present invention protects.
Claims (2)
1. Video Multicast implementation method based on the SIP supervisory control system, described SIP supervisory control system comprises server, IPC and at least two SIP monitor clients, described server comprises again the service of SIP signaling and media services; It is characterized in that: described Video Multicast implementation method comprises following A, B, three kinds of situations of C:
Media Stream between A, SIP monitor client and IPC is during via transit server, and after a SIP monitor client and an IPC connect by server, supposes that this moment, the 2nd SIP monitor client will monitor this IPC, and send the INVITE request;
The first-selected authority of confirming the 2nd SIP monitor client of steps A 1, server, if having the right, this moment server directly by media services allocation medium port, and provide the 200OK response;
Steps A 2, the 2nd SIP monitor client send ACK, so far, set up rtp streaming between the 2nd SIP monitor client and server, and server is responsible for the audio/video flow of IPC is forwarded to a SIP monitor client and the 2nd SIP monitor client;
Suppose a SIP monitor client, the 2nd SIP monitor client, the IP address of the media services of IPC and server is respectively: IP1, IP2, IP3, IP4; The one SIP monitor client, the 2nd SIP monitor client monitors IPC simultaneously, 6 RTP of audio frequency and video supervision are connected to:
The one SIP monitor client:
Audio stream: ip1/portA1＜-〉 ip4/portA4-1;
Video flowing: ip1/portV1＜-〉 ip4/portV4-1;
The 2nd SIP monitor client:
Audio stream: ip2/portA2＜-〉 ip4/portA4-2;
Video flowing: ip2/portV2＜-〉 ip4/portV4-2;
IPC:
Audio stream: ip3/portA3＜-〉 ip4/portA4-3;
Video flowing: ip3/portV3＜-〉 ip4/portV4-3;
B, set up session with the SIP monitor client as IPC, and Media Stream is direct-connected, and after a SIP monitor client and an IPC connect by server, supposes that this moment, the 2nd SIP monitor client will monitor this IPC, and initiate INVITE;
Step B1, server check the session status of IPC, first reply the 2nd SIP monitor client 100Trying;
Step B2, server are initiated Re-Invite to a SIP monitor client and IPC simultaneously; In the SDP that carries, media address is the IP address of media services and the echo port of distribution, redirects on media server with the media with a SIP monitor client and IPC;
Step B3, a SIP monitor client and IPC provide the 200OK response;
Step B4, server send the ACK confirmation message to a SIP monitor client and IPC respectively;
Step B5, simultaneously providing the 200OK response to the 2nd SIP monitor client, to carry the media address information of SDP be IP address and the port of media server;
Step B6, the 2nd SIP monitor client provide ACK; So far, whole system is completed the switching of Media Stream;
The dismounting of C, session: entered the Video Multicast pattern at a SIP monitor client, the 2nd SIP monitor client and an IPC, and hypothesis the one SIP monitor client this moment withdraws from;
Step C1, a SIP monitor client send BYE;
On step C2, server judgement IPC, the two-way session is arranged, therefore can not hang up IPC, it directly responds 200OK, simultaneously the media link between dismounting and a SIP monitor client; At this moment, the session of the 2nd SIP monitor client and IPC is proceeded;
Step C3, the 2nd SIP monitor client withdraw from, and send BYE;
Session on step C4, service judgement IPC is all withdrawed from, and therefore sends BYE to IPC;
The bye of IPC is received in step C5, service; Send 200OK for the 2nd SIP monitor client, so far session is all removed.
2. a kind of Video Multicast implementation method based on the SIP supervisory control system according to claim 1, it is characterized in that: a described SIP monitor client and the 2nd SIP monitor client have the function of propagandaing directed to communicate and when propagandaing directed to communicate simultaneously, media services at described server increase the stereo process module, after the audio stream of mixing from a SIP monitor client and the 2nd SIP monitor client, be sent to IPC; Perhaps the described server client that only allows to obtain microphone is propagandaed directed to communicate, and realizes by expansion SIP INFO, MESSAGE message.
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| WO2018129758A1 (en) * | 2017-01-13 | 2018-07-19 | 邦彦技术股份有限公司 | Monitor video distribution method and device thereof |
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