CN101090476A - Switchover method for video terminal and multi-point control unit - Google Patents
Switchover method for video terminal and multi-point control unit Download PDFInfo
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Abstract
This invention provides a switch method for video terminals and MCU, which monitors video terminals and switches to a backup video terminal automatically when a main video terminal is broken and reduces switch time of video terminals.
Description
Technical field
The present invention relates to the multi-media communication technical field, particularly a kind of in the video conference process changing method and the multipoint control unit (MCU, Multipoint Control Unit) of video terminal.
Background technology
Along with the internet popularize and based on the continuous development of TCP (TCP/IP, TransferControl Protocol/Internet Protocol) network technology, video conference becomes a kind of common exchange way gradually.Video conferencing system realizes virtual meeting by the network communications technology, and the user who disperses on the geography is accumulated in a place, by multiple mode exchange of information such as image, sound, carries out collaborative work.Space length has been shortened in video conference to the full extent, has made things convenient between the cooperation member in real time, has exchanged intuitively.
In video conference application, people are more and more higher for the reliability requirement of video conference.This reliability is mainly reflected in the fault-tolerance such as video conferencing system under network failure or the video terminal failure condition, requires video conferencing system still can keep normally carrying out of video conference when above abnormal conditions.Especially in some application scenario, for example, the video conference scene of government, electric power, public security etc. is to the reliability requirement strictness more of video conference.
In view of above demand, some video manufacturers are by increasing expansion card at MCU and video terminal at present, E1 (E1 is the speed standard of the pulse code modulation multiplex system digital hierarchy primary group in Europe) interface or Integrated Service Digital Network(ISDN) (ISDN are set on the expansion card, Integrated Services Digital Network) interface switches to realize the backup between multiple meeting link; Or, switch to realize the backup between the active and standby terminal by in the meeting-place, increasing the backup video terminal.
Figure 1 shows that a kind of video conferencing system that backup functionality is provided of prior art, in Fig. 1, dotted line is represented the E1 circuit, solid line is represented the IP circuit, by the backup functionality of E1 circuit realization to the IP circuit, be that video terminal and MCU are provided with IP interface and E1 interface simultaneously, the video terminal in each meeting-place (video terminal A, B) is connected with MCU with the IP circuit by the E1 circuit respectively.Use the IP circuit to call a meeting under the normal condition, and when the IP in certain meeting-place circuit disconnected unusually, the keeper was manually switched to and convene this meeting-place on the E1 circuit, kept video conference by the circuit with this meeting-place.
The another kind that Figure 2 shows that prior art provides the video conferencing system of backup functionality, in this system, two video terminals are set in each meeting-place respectively: main video terminal (as video terminal A and video terminal B) and backup video terminal (as video terminal a and video terminal b).The primary, spare video terminal in each meeting-place all is connected with MCU by IP network.Under the normal condition, participate in video conference by the main video terminal in each meeting-place.When main video terminal breaks down, for example, when the video terminal A in the meeting-place 1 breaks down, the keeper can be by manually adding backup video terminal a at the MCU place, invite video terminal a affiliation, thereby meeting-place 1 is switched on the video terminal a, to keep video conference.
From the above as can be seen, in the prior art, the backup handover operation of video terminal all needs administrator hand to carry out, and this operating process is loaded down with trivial details, and switching time is longer, must cause the broken string meeting-place long period not join, and influences the effect of whole video meeting.
Summary of the invention
Technical problem to be solved by this invention provides a kind of changing method and MCU of video terminal, is used for automatically switching to the backup video terminal when main video terminal goes offline.
For solving the problems of the technologies described above, it is as follows to the invention provides scheme:
A kind of changing method of video terminal comprises step:
Steps A, configuration and preserve the call information of the backup video terminal of main video terminal correspondence on multipoint control unit MCU;
Step B, in the video conference process, MCU monitors the presence of main video terminal;
Step C, when main video terminal went offline, MCU called out the backup video terminal of described main video terminal correspondence and sets up the meeting link according to described call information.
Changing method of the present invention, wherein, in the described steps A, the call information of described backup video terminal comprises: the terminal type and the corresponding call parameter of backup video terminal.
Changing method of the present invention, wherein, described terminal type comprises E1 terminal and IP terminal; Described calling parameter comprises: the IP address of the e1 port of E1 terminal number and IP terminal.
Changing method of the present invention, wherein, described step B comprises:
MCU is periodically to main video terminal transmitting supervisory signaling, and receives the response signaling of described main video terminal to described monitoring signaling, if do not receive described response signaling in the given time, judges that described main video terminal goes offline.
Changing method of the present invention, wherein,
Among the described step C, when described main video terminal went offline, MCU further judged whether to automatically switch to the backup video terminal: if then set up the meeting link between the backup video terminal of MCU and described main video terminal correspondence; Otherwise whether the prompting user switches to the backup video terminal, and when the user selects to switch, calls out described backup video terminal and set up the meeting link, when the user selects not switch, periodically sends linking request to described main video terminal.
Changing method of the present invention wherein, also comprises after the described step C:
Step D, MCU monitors the described main video terminal that goes offline; When described main video terminal was reached the standard grade, MCU disconnected the meeting link between itself and the described backup video terminal, rebulid the meeting link between itself and the described main video terminal.
Changing method of the present invention, wherein,
Among the described step D, the described main video terminal that goes offline is monitored be, MCU periodically sends linking request to described main video terminal, if link successfully, judges that described main video terminal reaches the standard grade.
Changing method of the present invention, wherein,
Described linking request is a H.225 transmission control protocol TCP linking request of call control protocol; Described link successfully is, sets up H.225 at MCU with described main video terminal that TCP links, and after finishing H.225 Signalling exchange, judges to link successfully.
Changing method of the present invention, wherein, MCU further preserves the conference status of participant video terminal;
Among the described step C, behind the meeting link of setting up between MCU and the described backup video terminal, MCU further is provided with the conference status of described backup video terminal according to the conference status of the described main video terminal that goes offline.
A kind of multipoint control unit MCU comprises:
Back-up terminals information configuration unit is used to dispose and preserve the call information of the backup video terminal of main video terminal correspondence;
The SOT state of termination monitoring unit is used for the presence at the main video terminal of video conference process monitoring;
Meeting link establishment unit, be used for when described SOT state of termination monitoring unit judges that described main video terminal goes offline, preserve the call information that the unit is preserved according to described back-up terminals information, call out the backup video terminal of the described main video terminal correspondence that goes offline and set up the meeting link.
Multipoint control unit of the present invention, wherein, described back-up terminals information is preserved the backup video terminal information of stating of preserving the unit and is comprised: the terminal type and the corresponding call parameter of backup video terminal.
Multipoint control unit of the present invention, wherein, described SOT state of termination monitoring unit, be further used for periodically to described main video terminal transmitting supervisory signaling, and receive the response signaling of described main video terminal to described detection signaling, if do not receive described response signaling in the given time, judge that described main video terminal goes offline.
Multipoint control unit of the present invention, wherein,
Described meeting link establishment unit is further used for the automatic switchover of configuration backup video terminal;
When described main video terminal went offline, described meeting link establishment unit further judged whether to have disposed and automatically switches to the backup video terminal, if then call out described backup video terminal and set up the meeting link.
Multipoint control unit of the present invention, wherein, after meeting link between MCU and the described backup video terminal was set up in described meeting link establishment unit, described SOT state of termination monitoring unit was further used for the described main video terminal that goes offline is monitored;
Described meeting link establishment unit is further used for when the described main video terminal of described terminal monitoring unit judges is reached the standard grade, and disconnects the meeting link between MCU and the described backup video terminal, rebulids the meeting link between MCU and the described main video terminal.
Multipoint control unit of the present invention, wherein, also comprise conference status preservation unit, be used to preserve the conference status of participant video terminal, and MCU and meeting between the described backup video terminal link set up after, the conference status of described backup video terminal is set according to the conference status of the described main video terminal that goes offline.
From the above as can be seen, the changing method of video terminal provided by the invention and MCU, monitor the presence of main video terminal by MCU, when main video terminal goes offline, automatically switch to the backup video terminal, make the handoff procedure automation, significantly reduced conference administrator's workload, shorten switching time simultaneously, made video conference smooth more; Among the present invention, after main video terminal went offline, MCU still monitored it, after main video terminal is reached the standard grade again, main video terminal was switched back in this meeting-place again, with reasonable use video terminal; And, MCU can be by preserving the conference status of participant video terminal among the present invention, and the conference status before switching according to video terminal is provided with the conference status of the video terminal of work at present, continuity in order to the conference status that keeps meeting-place, video terminal place guarantees normally carrying out of video conference.
Description of drawings
Fig. 1 is a kind of structural representation that the video conferencing system of backup functionality is provided of prior art;
Fig. 2 provides the structural representation of the video conferencing system of backup functionality for the another kind of prior art;
Fig. 3 is the described a kind of structural representation that the video conferencing system of backup functionality is provided of the embodiment of the invention;
Fig. 4 is the flow chart of the changing method of the described video terminal of the embodiment of the invention;
Fig. 5 monitors the schematic diagram of the presence of main video terminal for MCU in the embodiment of the invention;
Fig. 6 is the schematic flow sheet of the handover operation of video terminal in the embodiment of the invention;
Fig. 7 rebulids flow chart with the meeting link of main video terminal for MCU in the embodiment of the invention;
Fig. 8 is the structural representation of the described MCU of the embodiment of the invention.
Embodiment
The invention provides a kind of changing method and MCU of video terminal, at MCU place configuration backup end message, presence by MCU monitoring participant video terminal, automatically realize the seamless switching between main video terminal and the backup video terminal, shortened switching time, made video conference smooth more.The present invention is described in detail by specific embodiment below in conjunction with accompanying drawing.
Figure 3 shows that the described a kind of video conferencing system that backup functionality is provided of the embodiment of the invention, each meeting-place in this system is equipped with two video terminals, promptly main video terminal and backup video terminal.These two video terminals are connected with MCU respectively, and concrete connected mode can be by IP network or E1 circuit etc.Under the normal condition, represent the meeting-place to participate in video conference by main video terminal.When main video terminal break down or main video terminal and MCU between network when reason such as unusual taking place causing main video terminal to go offline, MCU switches to this meeting-place on the backup video terminal automatically, and video conference is normally carried out.
The changing method of the described video terminal of the embodiment of the invention as shown in Figure 4, may further comprise the steps:
Here, the call information of described backup video terminal comprises: the terminal type and the corresponding call parameter of backup video terminal.Wherein, described terminal type can comprise E1 terminal and IP terminal etc.; Described calling parameter comprises: the IP address of the e1 port of E1 terminal number and IP terminal etc.By above-mentioned configuration, MCU is with main video terminal and corresponding backup video terminal binding.
Here, can also further be the option of the automatic switchover of main video terminal configuration backup video terminal at the MCU place, be used for when main video terminal goes offline, MCU disposes according to this, and the meeting-place whether decision automatically will this main video terminal switches to the backup video terminal of correspondence.
Here, MCU can monitor the presence of main video terminal in several ways, and for example, as shown in Figure 5, MCU can be periodically to main video terminal transmitting supervisory signaling roundTripDelayRequest; Main video terminal returns response signaling roundTripDelayResponse to described monitoring signaling to MCU after receiving this signaling, be used for keeping calling out.If MCU does not receive described response signaling roundTripDelayResponse in the given time, judge that then described main video terminal goes offline.
Here, if MCU has disposed the option of the automatic switchover of backup video terminal, then when main video terminal goes offline, MCU is further according to this configuration, judge whether to automatically switch to the backup video terminal: if, then call out described backup video terminal and set up MCU and described backup video terminal between the meeting link; Otherwise, can point out the user whether to switch to the backup video terminal by User Interface, and select to handle accordingly according to the user, for example, when the user selects to switch, call out described backup video terminal and set up the meeting link, when the user selects not switch, periodically send linking request to the described main video terminal that goes offline.
When judging that main video terminal goes offline, MCU is according to the call information that is disposed for the backup video terminal of this main video terminal correspondence in the step 41, call out this backup video terminal, be used to set up the meeting link between MCU and the backup video terminal, guarantee normally carrying out of video conference, concrete handover operation can may further comprise the steps as shown in Figure 6:
By above-mentioned steps, MCU has realized the meeting-place is switched to the backup video terminal.Please continue with reference to figure 4, after switching to the backup video terminal, the changing method of the described video terminal of the embodiment of the invention also comprises:
Here, MCU can periodically send linking request to the described main video terminal that goes offline, realization is to the monitoring of described main video terminal, if link successfully with described main video terminal, judge that described main video terminal reaches the standard grade, and disconnect itself and the meeting link of backup video terminal, rebulid the meeting link of itself and described main video terminal.With main video terminal is that the IP terminal is an example, and concrete operating process as shown in Figure 7.
Among Fig. 7, MCU periodically sends H.225 TCP linking request of call control protocol to described main video terminal, if success set up H.225 with described main video terminal that TCP links, MCU further comprises the H.225 Signalling exchange of signalings such as setup, alerting, connect with described main video terminal, if above-mentioned H.225 Signalling exchange success, judge then to link successfully that described main video terminal is reached the standard grade.Why after Signalling exchange success H.225, just judge described main video terminal reach the standard grade be because: after described main video terminal goes offline, may occur other non-video terminal in the network and use the former IP address of described main video terminal, even thereby H.225 MCU and this non-video terminal set up TCP and linked and can not think that described main video terminal reaches the standard grade, so further carry out H.225 Signalling exchange, to improve the reliability of judged result.After judging that described main video terminal is reached the standard grade again, MCU sends to described backup video terminal and disconnects call request signaling releaseComplete, and by closing logical channel signaling closeLogicalChannel, signalings such as conversation end signaling endSessionCommand disconnect itself and the meeting link of backup between the video terminal, and with described main video terminal set up the medium control protocol H.245 TCP link, by comprising that terminal capability is provided with signaling setTerminalCapability, signaling masterSlaveDetermination is set the principal and subordinate and logical channel is set up H.245 Signalling exchange such as signaling openLogicalChannel, set up the meeting link between itself and the described main video terminal, thereby the meeting link is switched back described main video terminal again.
It is pointed out that in video conference the participant video terminal has different conference status, for example comprise chairman, spokesman and common meeting-place etc.MCU can be by preserving the conference status of participant video terminal among the present invention, thereby after video terminal switches, the conference status of the video terminal of work at present is set according to the conference status before switching, continuity in order to the conference status that keeps meeting-place, video terminal place guarantees normally carrying out of video conference.
From the above as can be seen, the present invention monitors the presence of main video terminal by MCU, and after going offline, main video terminal automatically switches to the backup video terminal, make the handoff procedure automation, significantly reduced conference administrator's workload, also shorten switching time simultaneously, made video conference smooth more.
Based on the changing method of above-mentioned video terminal, present embodiment also provides a kind of MCU accordingly, and as shown in Figure 8, this MCU comprises:
Back-up terminals information configuration unit 81 is used to dispose and preserve the call information of the backup video terminal of main video terminal correspondence.Here, the backup video terminal information of stating of described back-up terminals information preservation unit 81 preservations comprises: the terminal type and the corresponding call parameter of backup video terminal.
SOT state of termination monitoring unit 82 is used for the presence at the main video terminal of video conference process monitoring.Here, described SOT state of termination monitoring unit 82, be further used for periodically to main video terminal transmitting supervisory signaling, and receive the response signaling of described main video terminal to described detection signaling, if do not receive described response signaling in the given time, judge that described main video terminal goes offline.
Meeting link establishment unit 83, be used for when described SOT state of termination monitoring unit 82 judges that described main video terminal goes offline, preserve the call information that unit 81 is preserved according to described back-up terminals information, call out the backup video terminal of the described main video terminal correspondence that goes offline and set up the meeting link.
Conference status is preserved unit 84, be used to preserve the conference status of participant video terminal, and MCU and meeting between the described backup video terminal link set up after, the conference status of described backup video terminal is set according to the conference status of the described main video terminal that goes offline.
In the present embodiment, described meeting link establishment unit 83 can also be further used for the automatic switchover of configuration backup video terminal; When described main video terminal went offline, described meeting link establishment unit 83 further judged whether to have disposed and automatically switches to the backup video terminal, if then call out described backup video terminal and set up the meeting link.
In the present embodiment, after meeting link between MCU and the described backup video terminal was set up in described meeting link establishment unit 83, described SOT state of termination monitoring unit 82 was further used for the described main video terminal that goes offline is monitored; Described meeting link establishment unit 83 is further according in described terminal monitoring unit 82 when judging that described main video terminal is reached the standard grade, disconnect the meeting link between MCU and the described backup video terminal, rebulid the meeting link between MCU and the described main video terminal.
In sum, the changing method of the described video terminal of the embodiment of the invention and MCU monitor the presence of main video terminal by MCU, when main video terminal goes offline, automatically switch to the backup video terminal, shortened switching time, make video conference smooth more.
The changing method of video terminal of the present invention and MCU, be not restricted to listed utilization in specification and the execution mode, it can be applied to various suitable the present invention's field fully, for those skilled in the art, can easily realize additional advantage and make amendment, therefore under the situation of the spirit and scope of the universal that does not deviate from claim and equivalency range and limited, the examples shown that the present invention is not limited to specific details, representational equipment and illustrates here and describe.
Claims (15)
1. the changing method of a video terminal is characterized in that comprising step:
Steps A, configuration and preserve the call information of the backup video terminal of main video terminal correspondence on multipoint control unit MCU;
Step B, in the video conference process, MCU monitors the presence of main video terminal;
Step C, when main video terminal went offline, MCU called out the backup video terminal of described main video terminal correspondence and sets up the meeting link according to described call information.
2. changing method as claimed in claim 1 is characterized in that, in the described steps A, the call information of described backup video terminal comprises: the terminal type and the corresponding call parameter of backup video terminal.
3. changing method as claimed in claim 2 is characterized in that, described terminal type comprises E1 terminal and IP terminal; Described calling parameter comprises: the IP address of the e1 port of E1 terminal number and IP terminal.
4. changing method as claimed in claim 1 is characterized in that, described step B comprises:
MCU is periodically to main video terminal transmitting supervisory signaling, and receives the response signaling of described main video terminal to described monitoring signaling, if do not receive described response signaling in the given time, judges that described main video terminal goes offline.
5. changing method as claimed in claim 1 is characterized in that,
Among the described step C, when described main video terminal went offline, MCU further judged whether to automatically switch to the backup video terminal: if then set up the meeting link between the backup video terminal of MCU and described main video terminal correspondence; Otherwise whether the prompting user switches to the backup video terminal, and when the user selects to switch, calls out described backup video terminal and set up the meeting link, when the user selects not switch, periodically sends linking request to described main video terminal.
6. changing method as claimed in claim 1 is characterized in that, also comprises after the described step C:
Step D, MCU monitors the described main video terminal that goes offline; When described main video terminal was reached the standard grade, MCU disconnected the meeting link between itself and the described backup video terminal, rebulid the meeting link between itself and the described main video terminal.
7. changing method as claimed in claim 6 is characterized in that,
Among the described step D, the described main video terminal that goes offline is monitored be, MCU periodically sends linking request to described main video terminal, if link successfully, judges that described main video terminal reaches the standard grade.
8. changing method as claimed in claim 7 is characterized in that,
Described linking request is a H.225 transmission control protocol TCP linking request of call control protocol; Described link successfully is, sets up H.225 at MCU with described main video terminal that TCP links, and after finishing H.225 Signalling exchange, judges to link successfully.
9. the method for claim 1 is characterized in that, MCU further preserves the conference status of participant video terminal;
Among the described step C, behind the meeting link of setting up between MCU and the described backup video terminal, MCU further is provided with the conference status of described backup video terminal according to the conference status of the described main video terminal that goes offline.
10. multipoint control unit MCU is characterized in that comprising:
Back-up terminals information configuration unit is used to dispose and preserve the call information of the backup video terminal of main video terminal correspondence;
The SOT state of termination monitoring unit is used for the presence at the main video terminal of video conference process monitoring;
Meeting link establishment unit, be used for when described SOT state of termination monitoring unit judges that described main video terminal goes offline, preserve the call information that the unit is preserved according to described back-up terminals information, call out the backup video terminal of the described main video terminal correspondence that goes offline and set up the meeting link.
11. multipoint control unit as claimed in claim 10 is characterized in that, described back-up terminals information is preserved the backup video terminal information of stating of preserving the unit and is comprised: the terminal type and the corresponding call parameter of backup video terminal.
12. multipoint control unit as claimed in claim 10, it is characterized in that, described SOT state of termination monitoring unit, be further used for periodically to described main video terminal transmitting supervisory signaling, and receive the response signaling of described main video terminal to described detection signaling, if do not receive described response signaling in the given time, judge that described main video terminal goes offline.
13. multipoint control unit as claimed in claim 10 is characterized in that,
Described meeting link establishment unit is further used for the automatic switchover of configuration backup video terminal;
When described main video terminal went offline, described meeting link establishment unit further judged whether to have disposed and automatically switches to the backup video terminal, if then call out described backup video terminal and set up the meeting link.
14. multipoint control unit as claimed in claim 10, it is characterized in that, after meeting link between MCU and the described backup video terminal was set up in described meeting link establishment unit, described SOT state of termination monitoring unit was further used for the described main video terminal that goes offline is monitored;
Described meeting link establishment unit is further used for when the described main video terminal of described terminal monitoring unit judges is reached the standard grade, and disconnects the meeting link between MCU and the described backup video terminal, rebulids the meeting link between MCU and the described main video terminal.
15. multipoint control unit as claimed in claim 10, it is characterized in that also comprising conference status preservation unit, be used to preserve the conference status of participant video terminal, and MCU and meeting between the described backup video terminal link set up after, the conference status of described backup video terminal is set according to the conference status of the described main video terminal that goes offline.
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| CN101877706A (en) * | 2010-06-24 | 2010-11-03 | 北京邮电大学 | Multi-terminal multimedia conference control system and implementation method |
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| CN103685144A (en) * | 2012-08-31 | 2014-03-26 | 中兴通讯股份有限公司 | Media stream transmission method and device |
| CN103685980A (en) * | 2013-12-20 | 2014-03-26 | 广东威创视讯科技股份有限公司 | Video signal backup method and system and video signal transmission method and system |
| CN103685980B (en) * | 2013-12-20 | 2017-02-08 | 广东威创视讯科技股份有限公司 | Video signal backup method and system and video signal transmission method and system |
| WO2016197795A1 (en) * | 2015-06-11 | 2016-12-15 | 中兴通讯股份有限公司 | Conference backup method, management node and conference system |
| CN105898357A (en) * | 2015-12-22 | 2016-08-24 | 乐视网信息技术（北京）股份有限公司 | Video switching method and device |
| WO2017128601A1 (en) * | 2016-01-27 | 2017-08-03 | 中兴通讯股份有限公司 | Method and device for backing up voice call |
| WO2017177879A1 (en) * | 2016-04-15 | 2017-10-19 | 中兴通讯股份有限公司 | Video conference terminal, and method and system thereof for interworking with internet video software |
| CN110784683A (en) * | 2019-10-08 | 2020-02-11 | 视联动力信息技术股份有限公司 | Management method, device and storage medium for monitoring resources |
| CN113497714A (en) * | 2020-03-20 | 2021-10-12 | 钉钉控股（开曼）有限公司 | Method for joining conference, method, device and equipment for locking conference |
| CN113497714B (en) * | 2020-03-20 | 2023-11-21 | 钉钉控股（开曼）有限公司 | Conference joining method, conference locking method, device and equipment |
| CN114189647A (en) * | 2021-10-29 | 2022-03-15 | 帜扬信通科技股份有限公司 | Terminal private line switching method, device, equipment and system |
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