CN100420194C - Video conference system and its data transmission method and device - Google Patents
Video conference system and its data transmission method and device Download PDFInfo
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- CN100420194C CN100420194C CNB2006101404385A CN200610140438A CN100420194C CN 100420194 C CN100420194 C CN 100420194C CN B2006101404385 A CNB2006101404385 A CN B2006101404385A CN 200610140438 A CN200610140438 A CN 200610140438A CN 100420194 C CN100420194 C CN 100420194C
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Abstract
This method includes that: the protocol conversion entity (PCE) receives the protocol message (PM) involving the conference beacon (CB) sent by the terminal, converts PM into video conference standard interface message (VCSIM) and re-transfers to the server. According to CB, the server inquires the relation between the CB pre-stored and the user beacon of the terminal attending conference, obtains the terminal user beacon (TUB) and sends the VCSIM and TUB to PCE. PCE converts VCSIM into PM and sends it to the related terminal via TUB. This invention can realizes the video conference under any protocol terminal. Every terminal can flexibly control the conference. This scheme is easy to realize. A videoconference system and its data transfer device are disclosed as well.
Description
Technical field
The present invention relates to the data transmission technology of the communications field, relate in particular to a kind of video conferencing system and data transmission method thereof, reach device.
Background technology
Video conference is as the novel conferencing that occurs cybertimes, greatly promoted meeting efficient and effect of meeting with abundant in content multimedia application, convenient real-time occupation mode, the long-range interchange of cross-region, cheap convention expense.
Mainly comprise the user terminal and the webserver in the general video conferencing system, user terminal is mainly realized the collection and the coding of audio frequency, video and is sent to the webserver, receives remote data and the decoding broadcast transmitted from the webserver simultaneously.Different webserver implementation method differences, but general main multipoint control unit (MCU) and the meeting management system of comprising.MCU is the core of whole video conference system, and it is an end points on the network, be mainly the three parts or more the multiple terminals add the meeting providing capability.MCU mainly is made up of multipoint controller (MC) and multiple spot Media Processor (MP), MC be mainly the three parts or more the multiple terminals add meeting signaling control, conferencing resource control, capability negotiation etc. be provided.MP mainly provides the processing of media resources such as audio frequency, video, data flow, mainly comprises exchange and other control messages of audio mixing, Media Stream.Meeting management system provides the management and the controlled function of video conference, and functions such as similar scheduling meeting, meeting prolongation, meeting interruption mainly are provided.
As shown in Figure 1, existing video conference is based on agreement H.323 mostly, mainly comprises gatekeeper, gateway, MCU, equipment such as terminal H.323.Wherein, the gatekeeper is not the necessary equipment of video conferencing system, and its main effect is to provide address translation, access control and Bandwidth Management etc. for the network equipment H.323; Gateway be other network (such as public switch telephone network PSTN, integrated services digital network ISDN and public relations land mobile PLMN etc.) and H.323 network interworking protocol conversion and medium access are provided; MCU is the nucleus equipment of video conference, realizes the signaling control and the medium control of video conference; H.323 terminal provides the terminal equipment of audio frequency, video, data communication for the user.Gatekeeper and gateway, MCU and H.323 between the terminal by protocol transmission data H.323, gateway, MCU and H.323 between the terminal by real-time transport protocol (rtp) transmission data.
In the prior art, having only H.323, protocol terminal can insert video conference, if want to realize that other protocol terminals insert meetings then the gateway that needs to carry out protocol conversion, for example SIP (SIP) terminal wants to insert meeting then needs to increase and Session Initiation Protocol can be converted to the H.323 gateway of agreement.Simultaneously, in video conference based on agreement H.323, be inconvenient to realize user terminal control meeting, therefore if realize user terminal control meeting, no matter user terminal is telephone set or the terminal by IP network, all need user terminal to use the dual-tone multifrequency key, this dual-tone multifrequency key information passes to meeting management system with H.323 agreement or inband signaling and realizes control to meeting.In addition, because H.323 agreement itself is very complicated, the realization that can cause video conference is more complicated also.
Summary of the invention
The embodiment of the invention provides a kind of video conferencing system and data transmission method and device, have only H.323 to solve to exist in the prior art that protocol terminal can insert meeting, and be inconvenient to realize terminal control meeting, the problem of realization more complicated that makes video conference.
A kind of videoconference data transmission method that the embodiment of the invention provides is applied in the video conferencing system of the soft switch entity that comprises server, Open Service Gateway and be connected an above terminal, and this method comprises:
The protocol message that contains meeting identification that the described terminal that described soft switch entity will receive sends is converted to the SIP sip message and sends to described Open Service Gateway, and Open Service Gateway is converted to this sip message video conference standard interface CORBA/Web Service message and is transmitted to described server;
Described server is according to described meeting identification, the corresponding relation of the user ID of the terminal of the described meeting identification that inquiry is preserved in advance and this meeting of participation, obtain terminal user identification, CORBA/Web Service message and described terminal user identification are sent to Open Service Gateway, and this Open Service Gateway is to send to described soft switch entity behind the sip message with CORBA/Web Service message conversion;
Described soft switch entity is converted to protocol message with this sip message, and utilizes described terminal user identification that this message is sent to counterpart terminal.
The embodiment of the invention also provides a kind of video conferencing system, and this system comprises server, Open Service Gateway and be connected the soft switch entity of an above terminal,
Server, be used to receive the video conference standard interface CORBA/Web Service message that contains meeting identification, according to described meeting identification, the corresponding relation of the user ID of the terminal of the described meeting identification that inquiry is preserved in advance and this meeting of participation, obtain terminal user identification, CORBA/Web Service message and described terminal user identification are sent to described Open Service Gateway;
Open Service Gateway, be used to receive the sip message that contains meeting identification that the soft switch entity sends, this protocol message is converted to CORBA/Web Service message sends to server, and the described terminal user identification and the CORBA/Web Service message of reception server transmission, be that sip message and described terminal user identification send to described soft switch entity with this CORBA/Web Service message conversion;
Described soft switch entity, be used for the protocol message that contains meeting identification that receiving terminal sends, this protocol message is converted to sip message sends to described Open Service Gateway, and receive sip message and the terminal user identification that described Open Service Gateway sends, this sip message is converted to protocol message sends to this terminal user identification counterpart terminal.
The embodiment of the invention also provides a kind of server, this server comprises the interface unit that contains video conference standard interface CORBA/Web Service, described interface unit is used to receive the CORBA/Web Service message that contains meeting identification that Open Service Gateway sends, wherein, this CORBA/Web Service message is that Open Service Gateway obtains the sip message conversion that protocol message is converted to according to the soft switch entity; According to described meeting identification, the corresponding relation of the user ID of the terminal of the described meeting identification that inquiry is preserved in advance and this meeting of participation, obtain terminal user identification, CORBA/Web Service message and described terminal user identification are sent to Open Service Gateway.
The embodiment of the invention also provides a kind of protocol conversion entity, and this protocol conversion entity application is between terminal and server, and described protocol conversion entity comprises:
The soft switch entity, the protocol message that the terminal that is used for receiving sends is converted to Session Initiation Protocol message; The Session Initiation Protocol message conversion that the Open Service Gateway that receives is sent is the protocol message of described terminal;
Open Service Gateway, the Session Initiation Protocol message conversion that the soft switch entity that is used for receiving sends is a video conference standard interface CORBA/Web Service message; The video conference standard interface message CORBA/Web Service that the server that receives is sent is converted to Session Initiation Protocol message.
The embodiment of the invention is by the protocol conversion entity, after the protocol message that the terminal that receives is sent is converted to CORBA/Web Service message, sends to server again; And after the CORBA/Web Service message conversion that the server that receives sends is protocol message, send to corresponding terminal again.So just realized audio conferencing, video conference and the audio frequency of any protocol terminal, the mixing meeting of video, and terminal can control meeting flexibly, various notice of meeting method is arranged, implementation method is simple, and function and capacity extensions are convenient.
Description of drawings
Fig. 1 is that the video conference structure is formed schematic diagram in the prior art;
Fig. 2 is a videoconference system architecture schematic diagram in the embodiment of the invention;
Fig. 3 is a video conference networking diagram in the embodiment of the invention;
Fig. 4 is the signaling process schematic diagram of predetermined conference in the embodiment of the invention;
Fig. 5 is for entering the signaling process schematic diagram of meeting in concentrated incoming call mode in the embodiment of the invention;
Fig. 6 enters the signaling process schematic diagram of meeting in the embodiment of the invention in center exhalation mode;
Fig. 7 is the signaling process schematic diagram that arrives the closing session mode in the embodiment of the invention with the time of meeting;
The signaling process schematic diagram of Fig. 8 closing session mode when leaving with control terminal in the embodiment of the invention;
Fig. 9 invites the participant for control terminal in the conference process in the embodiment of the invention and enters the signaling process schematic diagram of conferencing;
Figure 10 withdraws from the signaling process schematic diagram of conferencing for control terminal in the conference process in the embodiment of the invention requires the participant;
Figure 11 is for showing the signaling process schematic diagram of all participants' information mode to the participant in the embodiment of the invention.
Embodiment
In order to solve can only be that single protocol terminal can insert meeting, and the problem of inconvenience realization terminal control meeting, and the embodiment of the invention has proposed the video-meeting method based on the protocol conversion entity.This protocol conversion entity can comprise Open Service Gateway (Parlay/Parlay X GW) and soft switch entity (Call Server).
Because Call Server can realize the conversion between the various hello protocols, and Parlay/Parlay X GW can realize various callings and non-hello protocol and video conference standard interface message mapping, so server (VC App) can utilize Call Server and Parlay/Parlay X GW to realize that the variety of protocol terminal inserts meeting and control meeting, and can realize notifying the participant very simply.
Be described in further detail below in conjunction with the method for Figure of description the embodiment of the invention.
As shown in Figure 2, be system configuration schematic diagram in the embodiment of the invention, this system comprises server 11, protocol conversion entity 12.Wherein, server 11 is used to receive the video conference standard interface message that contains meeting identification, according to described meeting identification, the corresponding relation of the user ID of the terminal of the described meeting identification that inquiry is preserved in advance and this meeting of participation, obtain terminal user identification, video conference standard interface message and described terminal user identification are sent to described protocol conversion entity; Protocol conversion entity 12 is used for the protocol message that contains meeting identification that receiving terminal sends, this protocol message is converted to video conference standard interface message sends to described server, and receive video conference standard interface message and the terminal user identification that described server sends, be that protocol message sends to this terminal user identification counterpart terminal with this video conference standard interface message conversion.
In embodiments of the present invention, the video conference standard interface message that adopts between server and the protocol conversion entity can comprise common object request broker agreement (CORBA) interface message/network service (WebService) interface message.
This system operating mode is: the protocol message that contains meeting identification that soft switch entity receiving terminal sends, what this protocol message adopted is this terminal corresponding protocols, it is that sip message sends to Open Service Gateway that the soft switch entity is received behind this protocol message this message conversion, and Open Service Gateway is converted to this sip message CORBA/Web Service interface message again and sends to server; After server receives this CORBA/Web Service interface message, corresponding relation according to the meeting identification of preserving and the user ID of the terminal that participates in this meeting finds out this user ID, and this user ID and CORBA/WebService interface message are sent to Open Service Gateway; Open Service Gateway is converted to sip message with this CORBA/Web Service interface message, and the sip message after will changing and user ID send to the soft switch entity, the soft switch entity is judged this terminal corresponding protocols message according to user ID, this sip message is converted to this terminal corresponding protocols information and sending gives terminal.
As shown in Figure 3, be the networking diagram of the video conference in the embodiment of the invention.When predetermined conference, the protocol terminal that control terminal is promptly initiated meeting application request passes through Web portal (WebPortal) page that page server provides to VC App predetermined conference, and the protocol terminal that inserts meeting can be sip terminal, H.323 terminal, gateway control protocol (MGCP) terminal or fixing arbitrarily, portable terminal.VC App accepts predetermined back and preserves conferencing information and notify the participant, and advice method can be lettergram mode or short message way.In meeting, can carry out video, audio frequency or look, the audio mix meeting; Carry out data conferencing if desired, can increase then T.120MP that the realization data is shared, application program is shared and file transfer etc.; Because the corresponding a kind of conferencing resource of MP provides the coding and decoding video ability such as Video MP, Audio MP provides the audio coding decoding ability, the meeting number that MP can provide, also be that conferencing resource is limited, if therefore will just only need to increase corresponding M P to capacity extensions.
With the sip terminal is that example explanation terminal is controlled meeting, this terminal is carried out meeting control by Simple Object Access Protocol (SOAP), carry out signaling control by Session Initiation Protocol, describe terminal capability by Session Description Protocol (SDP), carry out the media data transmission by real-time transport protocol (rtp)/RTCP Real-time Transport Control Protocol (RTCP).
The video conference process can be decomposed into: scheduling meeting, meeting are held, end and meeting control.The protocol message that terminal is initiated, as the meeting control messages, enter the Conference Calling request, release message and response message, this meeting control messages comprises at least: invite participant's request message, require the participant to withdraw from conference request, show participant's information request message, the participant applies for control terminal request message and the new control terminal request message of current control terminal appointment, these message can become the CORBA/WebService interface message by protocol conversion and enter server, and the CORBA/Web Service interface message information translation of server initiation simultaneously is for receiving message terminal corresponding protocols message.
Scheduling meeting is that terminal is passed through the predetermined of CORBA/Web Service interfac message notification VC App realization meeting on Web Portal.When scheduling meeting, the terminal of initiating meeting application request is control terminal, but the whole session then not necessarily, ordinary terminal can apply to become control terminal, current control terminal also can specify ordinary terminal to become control terminal.
Meeting is held can dual mode: concentrate incoming call formula and center exhalation formula.Concentrate the incoming call mode to be: dial " meeting Number for access+Conference ID+meeting password " by the participant and enter meeting when the time of meeting arrives, wherein, Conference ID is exactly a meeting identification.Exhalation mode in center is: call out the participant by VC App according to participant's terminal user identification when the time of meeting arrives, the participant answers the call and enters meeting.Mode that meeting adjourned can have two kinds: when meeting adjourned time arrives, by VC App each meeting person's terminal in meeting is sent releases (release) message, discharge and all participants' calling; Also do not arrive when the time of meeting, but control terminal withdraws from meeting, then VC App closing session and release conferencing resource.
Meeting control can be divided into control terminal meeting control, participant's meeting control, listen hearer's meeting control etc.Control terminal meeting control mainly comprises: invite certain participant, require certain participant to withdraw from meeting, close all or certain participant's audio stream, close all or certain participant's video flowing, specify new control terminal, show all participants' role and state etc.Participant's session control function mainly comprises: close local audio stream, close local video stream, the application control terminal shows all participants' role and state etc.Listening hearer's session control function mainly comprises: close local audio stream, close the local video flow process, show all participants' role and state etc.Meeting control can be passed through CORBA/Web Service interface by Web Portal and realize; When the participant is sip terminal, then control messages can be encapsulated as soap message, information (INFO) message by the SIP expansion is carried to Parlay/Parlay X GW with packaged soap message, and Parlay/Parlay X GW realizes meeting control with this message conversion for the CORBA/WebService interface message offers video conferencing system.
Be that embodiment describes embodiment of the invention method in detail with these steps respectively below.
Embodiment 1 is the predetermined conference process, and setting control terminal in the present embodiment is sip terminal.As shown in Figure 4, the predetermined conference step is:
Step 401: control terminal passes through Web Portal and initiates meeting application request to VCApp.
In the embodiment of the invention, when predetermined conference, the terminal of initiating meeting application request (ApplyConference) just is identified as control terminal.Page server provides a Web Portal page to be the predetermined page to this terminal, this sip terminal is imported the time of meeting, conference content, conference model, participant's information, is notified conferencing informations such as participant's mode in this page, this participant's information comprises contents such as participant's number, number of short message, e-mail address and participant's terminal user identification again.
The page server at Web Portal page place passes through CORBA/Web Service interface and initiates meeting application request to VCApp, comprises conferencing information in this request.After VC App receives this request, meeting number when holding according to meeting judges whether to also have enough conferencing resources, if satisfy condition, then reserve corresponding conferencing resource for meeting, be meeting and reserve corresponding association, and the information such as Conference ID and meeting password that generate send application response message (ApplyRes) to Web Portal; If do not satisfy condition, then send the refusal response message to WebPortal.Simultaneously, VC App preserves this conferencing information.
Step 402:VC App sends to the participant according to the participant's mode of notifying that comprises in the conferencing information with meeting information.
VC App obtains to notify participant's mode according to the conferencing information in the meeting application request, can be short message notification, mail notification or mail and short message notification etc.If advice method is a short message notification, VCApp sends message by CORBA/Web Service interface to Short Message Service Center (SMSC), because Parlay/Parlay X GW can realize calling out the mapping with non-hello protocol and CORBA/Web Service interface, so VC App is earlier to the Parlay/Parlay X GW business information (Sms) that sends SMS message, number of short message and content of short message have been comprised in this information, Parlay/Parlay X GW submits to this Sms to Short Message Service Center again, then Short Message Service Center the most at last content of short message send to the participant, this content of short message has comprised the time of meeting, the meeting Number for access, information such as Conference ID and meeting password.If advice method is a mail notification, VC App sends e-mail messages (Email) by Simple Mail Transfer protocol (SMTP) to mail server (Email Center), addresses of items of mail and Mail Contents have been comprised in this information, mail server finally sends to the participant according to addresses of items of mail with Mail Contents then, has comprised information such as the time of meeting, meeting Number for access, Conference ID and meeting password in this Mail Contents.
Control terminal can also input be set in during conferencing information meeting begin before a certain period remind participant's conference participation once more, alerting pattern can be the same with lettergram mode with above-mentioned short message way.
Step 403: control terminal is inquired about conference status by Web Portal to VC App.
When VC App accepted this scheduling meeting and with conferencing information in after the mode that requires notifies the participant, control terminal can be once more by Web Portal inquiry conference status at this moment.Web Portal initiates the various states that status query request (StateQuery) is inquired about meeting to VC App, and control terminal such as comprised in this StateQuery whether meeting is scheduled to successfully, whether conferencing information successfully sends to the participant is wished the active conference state known.After VC App receives this State Query,, inform the conference status that Web Portal is current to Web Portal return state response message (StateRes).
After control terminal is by the success of Web Portal predetermined conference, when arriving, just can hold a meeting the time of meeting.Embodiment 2 for the participant with concentrate the incoming call mode enter meeting be the example explanation when holding a meeting the participant enter the process of meeting, set the participant to enter meeting in the present embodiment and be terminal H.323, this terminal is an IP phone, as shown in Figure 5, concentrates the incoming call mode mainly to may further comprise the steps:
Step 501:VC App initiates to create request for conference to Parlay/Parlay X GW.
When scheduling meeting success and the time of meeting arrive, VC App sends to Parlay/Parlay X GW and creates request for conference (CreateConference), comprised meeting Number for access, Conference ID and meeting encrypted message in this request, Parlay/Parlay X GW accepts this request and returns and create meeting response message (CreateConfResp).
Step 502: the participant initiates to enter the Conference Calling request by Call Server and Parlay/Parlay X GW to VC App.
In the present embodiment, the participant is terminal H.323.After the time of meeting arrives, H.323 terminal is initiated the H.323 Conference Calling request that enters (Setup) of agreement, has comprised meeting Number for access, Conference ID, meeting password, this call capabilities information of terminal user identification and this terminal H.323 in this request.Call capabilities in embodiments of the present invention is meant media processing capacity, mainly refers to the IP address and the port of a coding/decoding capability set and receipts/medium.
After Call Server receives this call request, number in the request is analyzed and Route Selection, and incite somebody to action the call request (Invite/SDP) that the H.323 call request of agreement is converted to Session Initiation Protocol, again the call request after the protocol conversion is routed to Parlay/Parlay X GW.Call Server is the entity of access aspect, variety of protocol can be changed, but can only use Session Initiation Protocol to communicate between it and the Parlay/Parlay X GW.Therefore, the terminal of variety of protocol can both be converted to Session Initiation Protocol by Call Server and communicate by letter with Parlay/Parlay X GW, and then communicates by letter with VC App.
Parlay/Parlay X GW is converted to CORBA/Web Service interface message (JoinConference) once more with this call request after receiving the call request that Call Server route goes out, and the call request after VC APP submits to this to change once more.
Receive the call request of Parlay/Parlay X GW forwarding as VC App after, check whether the Conference ID that comprises in this call request exists, whether the meeting password is correct, when checking that when confirming that this terminal is correct participant, VC App accepts this call request.
Step 503:MP is corresponding destination node and respond the destination node call capabilities for the participant distributes.
Be initiated as this H.323 terminal distribution destination node request (AttachMedia) to Parlay/Parlay X GW immediately after the VCApp call accepted request, contain meeting identification in this request and be Conference ID, this H.323 user ID and call capabilities of terminal.
After Parlay/Parlay X GW received this request that distributes corresponding destination node, the ADD order by agreement H.248 was the corresponding related destination node that increases of meeting identification to the MP request.In the present embodiment, MP is the multiple spot Media Processor according to the H.248/MGCP agreement realization of standard, MP is according to destination node of user ID establishment of order of the interpolation of agreement (ADD) H.248 and terminal, with this terminal be one-to-one relationship, promptly each terminal is corresponding one by one with a destination node.
MP is according to this call capabilities of terminal H.323 of receiving subsequently, selects optimum coding/decoding ability that communicating pair all the supports medium load as intercommunication.MP returns (Reply) order to Parlay/Parlay X GW response, comprises the call capabilities of above-mentioned MP in this order, and the call capabilities of MP also comprises IP address and the port that receives and send Media Stream.If any coding/decoding ability in the terminal call ability that MP does not support to receive is then by Reply order notice terminal call release.
Parlay/Parlay X GW does protocol conversion after receiving this Reply order once more, H.248 agreement Reply command conversion is Session Initiation Protocol (200OK/SDP), will contain the call capabilities of above-mentioned MP and the 200OK/SDP order of the user ID of the terminal of correspondence again and send to Call Server.
After Call Server received the order that Parlay/Parlay X GW sends, the user ID according to the terminal of the correspondence that contains in this order was converted to H.323 agreement (Connect) with 200OK/SDP, is transmitted to this H.323 terminal again.
H.323 after terminal is received the Connect message that Call Server returns, open media channel according to the optimum call capabilities that the communicating pair that returns is all supported, promptly IP address and the port to the receiving media of the call capabilities of returning stream sends Media Stream, reception sends the IP address of Media Stream and the Media Stream that port is sent from call capabilities, wherein the Media Stream load format is the medium coding/decoding form in the call capabilities, so just finish capability negotiation and calling, and terminal successfully enters meeting.
Embodiment 3 is the process that example explanation participant enters meeting in center exhalation mode, and setting in the present embodiment and calling out the participant who enters meeting by VC App is sip terminal, and as shown in Figure 6, center exhalation mode mainly may further comprise the steps:
Step 601:VC App initiates to create request for conference to Parlay/Parlay X GW.
When scheduling meeting success and the time of meeting arrive, VC App sends to Parlay/Parlay X GW and creates request for conference (CreateConference), comprised meeting Number for access, Conference ID and meeting encrypted message in this request, Parlay/Parlay X GW accepts this request and returns and create meeting response message (CreateConfResp).
Step 602:VC App initiates the Conference Calling request to Parlay/Parlay X GW.
VC App initiates Conference Calling request (CreateCallReq) to Parlay/Parlay X GW, comprise meeting identification in this Conference Calling request and be Conference ID, participant's terminal user identification promptly with the information of terminal telephone number.
After Parlay/Parlay X GW received this call request, the ADD order by agreement H.248 was the corresponding related destination node that increases of meeting identification to the MP request.
MP sends the Reply order to Parlay/Parlay X GW subsequently, has comprised the call capabilities of MP and the association identification of this destination node in this order.Parlay/Parlay X GW does protocol conversion after receiving this Reply order, initiates the call request message (Invite/SDP) of Session Initiation Protocol to Call Server according to the call capabilities of the MP that receives.This call request message comprises call capabilities, the terminal user identification of MP.
Call Server does number analysis and Route Selection according to the telephone number in the call request after receiving the call request of Parlay/Parlay X GW transmission, gives this sip terminal with this call request route.
Step 603: participant's call accepted request also responds call capabilities.
After this sip terminal is received the call request message of Call Server transmission, select the medium load of the coding/decoding ability of the optimum that communicating pair all supports according to MP call capabilities in the call request as communicating pair, guarantee data can be between terminal and destination node normal transmission.
Return the response message (200OK/SDP) of the Session Initiation Protocol that accepts request behind user's off-hooks such as this sip terminal to Call Server, this response message comprises the user ID and the call capabilities of terminal, call capabilities comprises the optimum coding/decoding ability of having consulted, and terminal receives and the IP address and the port of transmission Media Stream, and Call Server sends to Parlay/Parlay X GW with the response message of this Session Initiation Protocol.
The response message of step 604:VC App receiving terminal.
Parlay/Parlay X GW receives the response message status report (StatusReport) that sends CORBA/Web Service interface message behind the response message of this Session Initiation Protocol to VC App.VC App is according to the call capabilities request (ModifyMedia) of call capabilities destination node of establishment before Parlay/Parlay X GW initiates to revise of the terminal in the response message.Parlay/Parlay X GW revises the call capabilities of this destination node by modification (Modify) the command request MP in the agreement H.248 subsequently, MP opens media channel after receiving this modify order, promptly the IP address of receiving media stream and port send Media Stream in the call capabilities of terminal, and sending the IP address of Media Stream and the Media Stream of port in the call capabilities of receiving terminal, the Media Stream loadtype of communicating pair is the optimum coding/decoding ability with terminal protocol.So just finish the foundation of ability agreement and media channel.
MP returns the H.248 Reply message of agreement to Parlay/Parlay X GW after having revised the call capabilities of this destination node, and Parlay/Parlay X GW receives the modification call capabilities response message (ModifyMediaResp) that sends CORBA/Web Service interface message after this Reply message to VC App.
The step that repeats embodiment 2 and embodiment 3 just can make the participant enter meeting, and for the participant of other protocol terminal, they are only different with the Signalling exchange agreement of Call Server, and all the other steps are identical.
It is example explanation meeting adjourned process that embodiment 4 arrives closing session with the time of meeting, sets in the present embodiment to also have two participants when the time arrives in meeting, and they are respectively sip terminal and terminal H.323.VC App can ask to discharge this two terminals simultaneously, also can initiate to discharge request respectively and discharge this two terminals successively.Present embodiment is an example to discharge these two terminals successively, and as shown in Figure 7, this mode mainly may further comprise the steps:
Step 701:VC App initiates to discharge request to Parlay/Parlay X GW.
When the predetermined the time of meeting that finishes arrives, VC App asks to the release (Release) that Parlay/Parlay X GW initiates CORBA/Web Service interface message according to the present also participant's information in meeting, has comprised the user ID of the terminal of needs releases in this request.In the present embodiment, VC App at first discharges sip terminal.
Step 702: the participant withdraws from meeting and initiates response message.
Parlay/Parlay X GW receives after the Release of VC App initiation asks and initiates two call release request simultaneously.Initiate to be converted to the H.248 release of agreement (Subtract) order to MP on the one hand, require the destination node of this sip terminal correspondence in the MP deletion meeting.Parlay/Parlay X GW finds the destination node corresponding with it according to the user ID in this Release request message, and MP deletes this destination node by the Subtract order request, MP returns the H.248 Reply response message of agreement to Parlay/Parlay X GW after deleting this destination node and closing media channel.
On the other hand, Open Service Gateway initiates to be converted to release (Bye) message of Session Initiation Protocol to Call Server, has also comprised the user ID of the sip terminal of needs releases in this message.Call Server sends to sip terminal according to this user ID with Bye message again.
After sip terminal is received and closed media channel after this Bye message immediately and discharge related resource, initiate the status response message (200OK) of Session Initiation Protocol to CallServer.This related resource mainly contains media channel, the internal memory when setting up calling etc.
Step 703: inform that VC App discharges successfully.
Call Server transmits the response message of sip terminal initiation and gives Parlay/Parlay X GW, Parlay/Parlay X GW receives the release success state report (StatusReport) that sends CORBA/Web Service interface message behind this response message to VC App, and this sip terminal of notice VC App successfully withdraws from meeting.
After this sip terminal withdraws from meeting, repeating step 701 to 703 makes that H.323 terminal also successfully withdraws from meeting, but with sip terminal withdraw from meeting different what be that H.323 the information interaction between terminal and the Call Server adopts is not Session Initiation Protocol but agreement H.323, Call Server does the H.323 conversion between the agreement and Session Initiation Protocol.
Closing session was an example when embodiment 5 left with control terminal, and setting control terminal in the present embodiment is sip terminal, also had a H.323 participant of terminal simultaneously.As shown in Figure 8, this mode mainly may further comprise the steps:
Step 801: meeting is withdrawed from the control terminal request.
It's not time yet when reaching when meeting adjourned, and control terminal is initiated the release message (Bye) of Session Initiation Protocol to Call Server, comprised the user ID of sip terminal in this message.Call Server is transmitted to Parlay/Parlay X GW after receiving this message.After Parlay/Parlay X GW receives this message, find the destination node sign corresponding, delete this destination node by the Subtract order request MP of agreement H.248 then with this terminal according to the terminal user identification that obtains.MP deletes this destination node and closes media channel simultaneously, and then returns Reply to Parlay/Parlay X GW.
Step 802:VC App response control terminal withdraws from meeting, and initiates to discharge request.
Parlay/Parlay X GW sends CORBA/Web to VCApp after receiving this Reply message
The call release incident (NotifyCallEvent) of Service interface message has comprised the user ID of sip terminal in this call release incident.Whether after VC App receives this call release incident, finding out this terminal according to the sip terminal user ID from the conferencing information of preserving is control terminal.If not control terminal then directly sends call release event response (NotifyCallEventRsp) to Parlay/Parlay X GW, in meeting adjourned continuation meeting before the time arrives; If control terminal then sends the call release event response to Parlay/Parlay X GW on the one hand, Parlay/Parlay X GW sends the response message of Session Initiation Protocol to Call Server, Call Server transmits this message again and gives control terminal, control terminal call release success this moment; On the other hand, VCApp also initiates the Release request of other participants' of release CORBA/Web Service interface message to Parlay/Parlay X GW according to present participant's information of being somebody's turn to do in meeting.
Step 803: the participant withdraws from meeting and initiates response message.
Parlay/Parlay X GW receives after the Release of VC App initiation asks and initiates two call release request simultaneously.Parlay/Parlay X GW finds the destination node corresponding with this terminal according to the user ID in this Release request message on the one hand, deletes this destination node by Subtract order request MP then.The MP deletion is somebody's turn to do middle node and is closed media channel, and then returns Reply to Parlay/Parlay X GW.
On the other hand, Parlay/Parlay X GW initiates the Bye message of Session Initiation Protocol to Call Server, has also comprised the user ID of the H.323 terminal of needs releases in this message.After Call Server receives the Bye message of this Session Initiation Protocol, knowing that according to user ID terminal is terminal H.323, is release (release) message of H.323 agreement with the Bye message conversion of this Session Initiation Protocol, sends to H.323 terminal again.
The H323 terminal is closed media channel after receiving this release message immediately, and discharges related resource, initiates to discharge the response message of finishing (release complete) to Call Server simultaneously.
Step 804: notice VC App discharges successfully.
The response message of the H.323 agreement that Call Server will receive is converted to Session Initiation Protocol and sends to Parlay/Parlay X GW, Parlay/Parlay X GW receives the release success state report (StatusReport) that sends CORBA/Web Service interface message behind the response message after this conversion to VC App, notice VC App this H.323 terminal successfully withdraw from meeting.
Embodiment 6 is that to invite the participant to enter meeting with control terminal in the conference process be example, and setting control terminal in the present embodiment is sip terminal, and the participant who is invited is a terminal H.323.As shown in Figure 9, this mode mainly may further comprise the steps:
Step 901: control terminal invites the participant to enter meeting.
After meeting began, this sip terminal was to the invitation participant's of the INFO of Call Server initiation Session Initiation Protocol request, and the message body of this INFO is a soap message, and the content of this soap message is this H.323 terminal user identification information of being invited.Call Server is transmitted to Parlay/Parlay X GW with this request, Parlay/Parlay X GW does the corresponding protocol conversion, INFO is converted to CORBA/Web Service interface control messages (ControlReq) sends to VC App, comprised this H.323 user ID of terminal in this control messages.VC App initiates to set up call request according to invitee's user ID after receiving this control messages.
The participant that step 902:VC App invites to quilt initiates the Conference Calling request.
Step 903: the participant accepts request and responds call capabilities.
Step 904: destination node is revised self call capabilities.
Step 902 is to 904 the same with the center call-out type process of embodiment 3, the terminal that different is is invited in the present embodiment is terminal H.323, therefore Call Server and H.323 the Signalling exchange between the terminal be to use H.323 agreement, Call Server will carry out the H.323 conversion of agreement and Session Initiation Protocol.
After this invitee enters meeting, VC App sends response control messages (ControlResp) by Parlay/Parlay X GW and Call Server to this sip terminal, the user ID that comprises the invitee in this message informs that this participant of control terminal has added meeting.
Embodiment 7 is that to leave meeting with control terminal requirement participant in the conference process be example, sets control terminal in the present embodiment and is terminal H.323, is required that the participant who withdraws from is a sip terminal.As shown in figure 10, this mode mainly may further comprise the steps:
Step 1001: control terminal requires the participant to withdraw from meeting.
After meeting begins, this H.323 terminal transmit control message to VC App by Web Portal, this control messages is a CORBA/Web Service interface message (ControlReq), has comprised the user totem information of this sip terminal in this interface message.VC App initiates to discharge request according to the user ID that is required the bolter after receiving this interface message.
Step 1002: the participant who is required withdraws from meeting and initiates response message.
Step 1003: notice VC App discharges successfully.
To withdraw from the process of meeting consistent with the sip terminal of embodiment 4 to 1003 for step 1002.
Step 1004: after this is required that the participant who withdraws from withdraws from meeting, Call Server sends the corresponding message of Session Initiation Protocol to Parlay/Parlay X GW, Parlay/Parlay X GW is again to VC App status report (StatusReport), VC App sends control response message (ControlResp) to Web Portal subsequently, shows that this participant withdraws from.
Embodiment 8 shows that to the participant all participants' information process is an example descriptive information procedure for displaying with VC App, but have only in embodiments of the present invention when terminal is sip terminal, the information that just may show the participant, other-end all can not show participant's information.Therefore setting the participant in the present embodiment is sip terminal A and sip terminal B.As shown in figure 11, this mode mainly may further comprise the steps:
Step 1101:VC App initiates to show the request of all participant's information to Parlay/Parlay X GW.
Add or withdraw from meeting as the participant, or when participant's information has change, VC App has comprised all participants' information and user ID to the demonstration request message (ShowReq) that Parlay/Parlay X GW initiates CORBA/Web Service interface message in this request message.
Step 1102: the information that sends all participants to the participant.
After receiving this request, Parlay/Parlay X GW does protocol conversion, this CORBA/Web Service interface message is converted to the INFO of sip message and is transmitted to Call Server, the message body of INFO is SOAP, and the content of this message body is all participants' information and a user ID.Because one the INFO correspondence is a terminal, so all should initiate a ShowReq for each terminal VC App, Call Server sends all participants' information to the participant according to each participant's user ID.In the present embodiment, Call Server directly is transmitted to sip terminal A and terminal B with the INFO of the sip message received.
Step 1103: notice VC App shows successfully.
This sip terminal A and terminal B receive response message from participant's information to Call Server that transmit Session Initiation Protocol after.Call Server directly is transmitted to Parlay/Parlay X GW with the response message of sip terminal, and Parlay/Parlay X GW notifies VC App to show successfully to the status report that VC App sends CORBA/Web Service interface message immediately.
The data transmission method of the video conference by the embodiment of the invention can realize that any protocol terminal inserts meeting, meeting control flexibly, the notice of meeting mode is various, realizes fairly simple.
The embodiment of the invention also provides a kind of server, this server comprises the interface unit that contains the video conference standard interface, described interface unit is used to receive the video conference standard interface message that contains meeting identification, according to described meeting identification, the corresponding relation of the user ID of the terminal of the described meeting identification that inquiry is preserved in advance and this meeting of participation, obtain terminal user identification, video conference standard interface message and described terminal user identification are sent to the protocol conversion entity.
The embodiment of the invention also provides a kind of protocol conversion entity, this protocol conversion entity application is between terminal and server, described protocol conversion entity comprises converting unit, and the protocol message that the terminal that described converting unit is used for receiving sends is converted to video conference standard interface message; And the video conference standard interface message conversion that the server that is used for receiving sends is a protocol message.
Converting unit comprises soft switch entity and Open Service Gateway.Wherein, the soft switch entity be used for will receive the protocol message that sends of terminal be converted to Session Initiation Protocol message; The Session Initiation Protocol message conversion that the Open Service Gateway that receives is sent is the protocol message of described terminal; The Session Initiation Protocol message conversion that the soft switch entity that Open Service Gateway is used for receiving sends is a video conference standard interface message; The video conference standard interface message conversion that the server that receives is sent is a Session Initiation Protocol message.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. videoconference data transmission method is applied to it is characterized in that this method comprises in the video conferencing system of the soft switch entity that comprises server, Open Service Gateway and be connected an above terminal:
The protocol message that contains meeting identification that the described terminal that described soft switch entity will receive sends is converted to the SIP sip message and sends to described Open Service Gateway, and Open Service Gateway is converted to this sip message video conference standard interface CORBA/Web Service message and is transmitted to described server;
Described server is according to described meeting identification, the corresponding relation of the user ID of the terminal of the described meeting identification that inquiry is preserved in advance and this meeting of participation, obtain terminal user identification, CORBA/Web Service message and described terminal user identification are sent to Open Service Gateway, and this Open Service Gateway is to send to described soft switch entity behind the sip message with CORBA/Web Service message conversion;
Described soft switch entity is converted to protocol message with this sip message, and utilizes described terminal user identification that this message is sent to counterpart terminal.
2. the method for claim 1 is characterized in that, described protocol message comprises at least: the meeting control messages, enter one or more in Conference Calling request, release message and the response message;
Described meeting control messages comprises at least: invite participant's request message, require the participant to withdraw from conference request, show that participant's information request message, participant apply for that control terminal request message and current control terminal specify one or more in the new control terminal request message.
3. the method for claim 1 is characterized in that, described terminal comprises at least: sip terminal, one or more in terminal and the gateway control protocol terminal H.323.
4. the method for claim 1 is characterized in that, the method for the corresponding relation of the user ID of the terminal of described preservation meeting identification and this meeting of participation is:
Terminal to server initiates to contain the meeting application request of conferencing information, and described conferencing information comprises the corresponding relation of the meeting identification and the user ID of the terminal that participates in this meeting;
Described conferencing information also comprises the time of meeting, meeting identification, meeting password and conferencing information advice method, described conferencing information advice method comprises sms notification or mail notification at least, or the combination of this dual mode, this conferencing information advice method of server by utilizing sends conferencing information to the terminal of conference participation.
5. a video conferencing system is characterized in that, this system comprises server, Open Service Gateway and be connected the soft switch entity of an above terminal,
Server, be used to receive the video conference standard interface CORBA/Web Service message that contains meeting identification, according to described meeting identification, the corresponding relation of the user ID of the terminal of the described meeting identification that inquiry is preserved in advance and this meeting of participation, obtain terminal user identification, CORBA/Web Service message and described terminal user identification are sent to described Open Service Gateway;
Open Service Gateway, be used to receive the sip message that contains meeting identification that the soft switch entity sends, this protocol message is converted to CORBA/Web Service message sends to server, and the described terminal user identification and the CORBA/Web Service message of reception server transmission, be that sip message and described terminal user identification send to described soft switch entity with this CORBA/Web Service message conversion;
Described soft switch entity, be used for the protocol message that contains meeting identification that receiving terminal sends, this protocol message is converted to sip message sends to described Open Service Gateway, and receive sip message and the terminal user identification that described Open Service Gateway sends, this sip message is converted to protocol message sends to this terminal user identification counterpart terminal.
6. server, it is characterized in that, this server comprises the interface unit that contains video conference standard interface CORBA/Web Service, described interface unit is used to receive the CORBA/Web Service message that contains meeting identification that Open Service Gateway sends, wherein, this CORBA/Web Service message is that Open Service Gateway obtains the sip message conversion that protocol message is converted to according to the soft switch entity;
According to described meeting identification, the corresponding relation of the user ID of the terminal of the described meeting identification that inquiry is preserved in advance and this meeting of participation, obtain terminal user identification, CORBA/Web Service message and described terminal user identification are sent to Open Service Gateway.
7. protocol conversion entity, this protocol conversion entity application is characterized in that between terminal and server described protocol conversion entity comprises:
The soft switch entity, the protocol message that the terminal that is used for receiving sends is converted to Session Initiation Protocol message; The Session Initiation Protocol message conversion that the Open Service Gateway that receives is sent is the protocol message of described terminal;
Open Service Gateway, the Session Initiation Protocol message conversion that the soft switch entity that is used for receiving sends is a video conference standard interface CORBA/Web Service message; The video conference standard interface message CORBA/Web Service that the server that receives is sent is converted to Session Initiation Protocol message.
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| EP2628089A1 (en) * | 2010-10-15 | 2013-08-21 | Hewlett-Packard Development Company, L.P. | Input/output communication |
| CN101986696A (en) * | 2010-11-30 | 2011-03-16 | 上海华平信息技术股份有限公司 | Information transfer equipment and video conference system |
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