CN102325245B - The automatic circuit reverse method of TV conference system and device - Google Patents
The automatic circuit reverse method of TV conference system and device Download PDFInfo
- Publication number
- CN102325245B CN102325245B CN201110255335.4A CN201110255335A CN102325245B CN 102325245 B CN102325245 B CN 102325245B CN 201110255335 A CN201110255335 A CN 201110255335A CN 102325245 B CN102325245 B CN 102325245B
- Authority
- CN
- China
- Prior art keywords
- circuit
- line
- communication
- normal
- line switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 147
- 238000001514 detection method Methods 0.000 claims description 39
- 230000009467 reduction Effects 0.000 claims description 8
- 230000006978 adaptation Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 230000006855 networking Effects 0.000 description 9
- 230000001737 promoting effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention discloses a kind of automatic circuit reverse method and device of TV conference system.In automatic circuit reverse method of the present invention, communication two ends are connected with call setup while of at least one E1 circuit by IP circuit in advance, and this at least one E1 circuit is as primary circuit, IP circuit is as extension wire, current employing is at the enterprising Serial Communication of this E1 circuit, when line status E1 circuit being detected is fault, then carry out corresponding line switching according to predetermined line switching strategy, comprising when the line status of whole E1 circuit is fault, is IP circuit by video/audio code stream communication from E1 line switching; When detecting after line switching that the line status of all or part of E1 circuit is normal, be normal E1 circuit by IP line switching loop line line state.The present invention, by opening primary communication port and alternate communication channels simultaneously, when making E1 line fault, can directly be switched to IP circuit, thus accelerate the speed of line switching.
Description
Technical field
The present invention relates to electronic communication field, particularly relate to a kind of automatic circuit reverse method and device of TV conference system.
Background technology
Along with development, IP (Internet Protocol, Internet protocol) network more and more becomes the major way of network service, but there is the problems such as intrinsic congested, out of order, shake due to IP network, and the application quality causing IP network to communicate is not high.And E1 circuit is because network-specific, the advantage such as the circuit error rate is low, line attachment quality is good can the quality that communicate of effective guarantee.Therefore, in the communications applications that some are important, adopt the communication mode that E1 circuit builds.But due to the expense of E1 circuit, comparatively IP circuit is expensive, therefore, in order to provide better service to user on expense, communication quality, adopt the communication line of the TV conference system jointly built based on E1 circuit and IP circuit, by E1 circuit as primary circuit, IP circuit is as extension wire.。
Summary of the invention
The main technical problem to be solved in the present invention is, what provide a kind of TV conference system realizes automatic circuit reverse method and device on heterogeneous network, and the method and device can accelerate the speed of line switching.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of automatic circuit reverse method of TV conference system, comprise between communication two ends and connect IP circuit and E1 circuit simultaneously, described E1 circuit is at least one, wherein said E1 circuit is primary circuit, described IP circuit is extension wire, and described communication two ends are called out by described E1 circuit and described IP circuit and connected in advance simultaneously, the described E1 circuit of current employing carries out video/audio code stream communication;
Detect the line status of described E1 circuit, if the line status of described E1 circuit is fault, then carry out corresponding line switching according to predetermined line switching strategy.
Further, described predetermined line switching strategy comprises: when the line status of whole E1 circuit is fault, video/audio code stream communication communicated from described E1 line switching to described IP circuit; After video/audio code stream communication is switched to IP circuit, when the line status all or part of described E1 circuit being detected is normal, described E1 circuit is switched back in video/audio code stream communication.
Further, detect the step of the line status of described E1 circuit, comprising:
Adopt end-to-end line status judgment model, judge the described E1 circuit that communicates between two ends whether fault, if judge described E1 line fault, then determine that described E1 line status is fault; If judge described E1 circuit fault-free, then determine that described E1 line status is normal.
Further, after video/audio code stream communication is switched to IP circuit, when the line status all or part of described E1 circuit being detected is normal, and the line status of this all or part of described E1 circuit, in predetermined time T, all continue normal, then video/audio code stream communication is switched back described E1 circuit and communicate.
Further, described predetermined line switching strategy also comprises: when the line status of the described E1 circuit of part is fault, reduces the video/audio code stream traffic rate at communication two ends.
Further, if the conference rate that the traffic rate after reduction of speed at communication two ends configures lower than multipoint control unit, then described multipoint control unit carries out adaptation processing to the video/audio code stream between communication equipment each in meeting.
Further, described predetermined line switching strategy also comprises: when in E1 circuit fault being detected, when having at least the line status of an E1 circuit to revert to normal, promote the video/audio code stream traffic rate at communication two ends, if and the conference rate that configures lower than multipoint control unit of the traffic rate after raising speed at communication two ends, then described multipoint control unit carries out adaptation processing to the video/audio code stream between communication equipment each in meeting.
An automatic circuit changeover apparatus for TV conference system, communication comprises IP circuit and E1 circuit between two ends, and described E1 circuit is at least one, and wherein said E1 circuit is primary circuit, and described IP circuit is extension wire; Described automatic circuit changeover apparatus comprises control module, detection module and line switching module, wherein,
Described control module, connect described IP circuit and described E1 circuit for controlling communication two ends simultaneously, and called out by described E1 circuit and described IP circuit in advance simultaneously, and adopt described E1 circuit to carry out video/audio code stream communication, simultaneously, trigger described detection module to detect in real time described E1 circuit, and formulate corresponding line switching strategy according to described IP circuit and described E1 circuit, and send to described detection module, described line switching strategy is when the line status of whole described E1 circuit is fault, the described E1 line switching of video/audio code stream communication from current employing is communicated to described IP circuit, when after line switching, when the line status all or part of described E1 circuit being detected is normal, be normal described E1 circuit by described IP line switching loop line line state,
Described detection module, be connected with described control module, for detecting the line status of described E1 circuit in real time, if the line status of described E1 circuit is fault, then triggers the described line switching strategy that described line switching module formulates according to described control module and carry out corresponding line switching;
Described line switching module, is connected with described detection module, during for detecting that when detection module the line status of described E1 circuit is fault, carries out corresponding line switching according to described line switching strategy.
Further, described detection module comprises end-to-end judgement submodule and line status determination submodule, describedly end-to-endly judges that submodule is for the described E1 circuit that adopts end-to-end line status judgment model and judge to communicate between two ends whether fault; Described line status determination submodule, be connected with described end-to-end judgement submodule, for when described end-to-end judgement submodule judges described E1 line fault, the line status determining the described E1 circuit between described communication two ends is fault, and when described end-to-end judgement submodule judges the described E1 circuit fault-free communicated between two ends, determine that the line status of the described E1 circuit between described communication two ends is normal.
Further, described automatic circuit changeover apparatus, also comprises Postponement module; Described detection module also for when by video/audio code stream communication from described E1 line switching to IP circuit after, when detecting that the line status of all or part of described E1 circuit reverts to normal, trigger described Postponement module to schedule T start timing, and for detecting all or part of line status recovering normal E1 circuit, in described scheduled time T, whether continue normal, if so, then triggering described line switching module by video/audio code stream communication is normal described E1 circuit from described IP line switching loop line line state; Described Postponement module is connected with described detection module, for detecting when described detection module, when described E1 circuit is to after being changed to IP circuit, when the line status of all or part of described E1 circuit reverts to normal, starts timing according to predetermined time T; Described line switching module is also for detecting when described detection module, and in described scheduled time T, the line status of all or part of E1 circuit all continues normal, be then normal described E1 circuit by described IP line switching loop line line state.
Further, described predetermined line switching strategy also comprises: when the line status of the described E1 circuit of part is fault, adopts residue line status to be that normal E1 circuit communicates; When in E1 circuit disconnection being detected, when having at least the line status of an E1 circuit to revert to normal, all line statuss are adopted to be that normal described E1 circuit carries out video/audio code stream communication; Described line switching module, time also for detecting that when described detection module the line status of the described E1 circuit of part is fault, declining the video and audio communication speed at communication two ends, namely adopting residue line status to be that normal E1 circuit communicates; And for detecting in the E1 circuit of disconnection when described detection module, when having at least the line status of an E1 circuit to revert to normal, the video and audio communication speed at communication two ends is raised, namely adopts all line statuss to be that normal E1 circuit carries out video/audio code stream communication; And if the conference rate that the communication traffic rate of two ends after reduction of speed/raising speed configures lower than MCU, then multipoint control unit carries out adaptation processing to the video/audio code stream between communication equipment each in meeting.
The invention has the beneficial effects as follows:
Automatic circuit reverse method of the present invention carries out call setup connection by E1 circuit and IP circuit by communication two ends simultaneously, and adopt at primary circuit, namely on E1 circuit, video/audio code stream communication is carried out, and when E1 circuit breaks down, carry out corresponding line switching according to predetermined line switching strategy.Owing to being called out by E1 circuit and this IP circuit in advance simultaneously, namely open primary communication channel and spare communication channel simultaneously, when carrying out line switching, direct is IP circuit by E1 line switching, or direct is E1 circuit by this IP line switching, avoid temporarily by this IP circuit to call out the situation of corresponding terminal, thus accelerate circuit switch speed.
Automatic circuit reverse method of the present invention, by by after E1 line switching to IP circuit, when detecting that all or part of E1 circuit recovers normal, and in predetermined time T, this all or part of E1 circuit continues normal, again IP line switching is returned this line status for normal all or part of E1 circuit, thus avoid frequently the switching of causing due to E1 circuit instability.
Because the present invention adopts end-to-end synchronization character alarm judgment model to judge the line status of the E1 circuit communicated between two ends, when making the E1 line fault communicated between two ends, corresponding E1 line fault can be learnt in communication two ends simultaneously, and line switching is carried out in communication two ends simultaneously, avoid because the xegregating unit in network is as the setting of switch etc., when only having a route road to break down, only have one end to receive alarm instruction that this xegregating unit (as switch) produces, namely line fault can not be learnt in communication two ends simultaneously, and cause the problem of switching simultaneously can not carrying out circuit, thus judgement when accelerating line fault and after line fault recovery, improve and actually switch speed, and be suitable for the environment of multiple E1 networking.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the automatic circuit changeover apparatus of TV conference system of the present invention;
Fig. 2 is the flow chart of an embodiment of the automatic circuit reverse method of TV conference system of the present invention;
Fig. 3 is the schematic network structure of the multiple spot networking of TV conference system of the present invention;
Fig. 4 be the automatic circuit reverse method of TV conference system of the present invention with the flow chart of specific embodiment;
Fig. 5 is the network diagram that reflection ATM exchanges networking model.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.Please refer to Fig. 1, is the structural representation of an embodiment of the automatic circuit changeover apparatus of the TV conference system of present embodiment.Communicate in the TV conference system of present embodiment between two ends and comprise IP circuit and at least one E1 circuit, and adopt E1 circuit to be primary circuit, IP circuit is extension wire, and communication two ends are provided with the automatic circuit changeover apparatus of present embodiment.
The automatic circuit changeover apparatus of the TV conference system of present embodiment comprises control module 100, detection module 101, line switching module 102 and Postponement module 103, wherein, control module 100 is connected with call setup while of IP circuit by this E1 circuit in advance for controlling communication two ends, and adopting this E1 circuit to carry out video/audio code stream communication, detection trigger module 101 detects in real time to E1 circuit between communication two ends simultaneously; And formulate corresponding line switching strategy according to this IP circuit and all E1 circuits, and send to detection module 101.Wherein, this predetermined line switching strategy is when the line status of whole E1 circuit is fault, and all E1 line switchings are carried out video/audio code stream communication to IP circuit, after video/audio code stream communication is switched to IP circuit, again detect the line status of all E1 circuits, if wherein have at least the line status of an E1 circuit to be normal, namely, when the line status of whole E1 circuit or part E1 circuit is normal, video/audio code stream communication is returned this line status for normal all or part of E1 circuit from IP line switching, detection module 101 is connected with control module 100, for detecting the line status of the E1 circuit between communication two ends in real time, have at least the line status of an E1 circuit to be fault if detect, then carry out corresponding line switching according to predetermined line switching strategy, even detect that the line status of whole E1 circuit is fault, then triggering this line switching module 102 by video/audio code stream communication is IP circuit from E1 line switching, and for after all E1 line switchings are IP circuit, when again detecting that the line status of all or part of E1 circuit reverts to normal in real time, shot clock 104 starts timing, and in the scheduled time T of this clock 104 timing, detecting this line status is whether the line status of normal E1 circuit continues normal, if, then triggering line switches module 102 be line status by video/audio code stream communication from IP line switching is normal E1 circuit, line switching module 102, be connected with detection module 101, for when the line status that this detection module 101 detects whole E1 circuit is fault, be IP circuit by video/audio code stream communication from E1 line switching, and when detection module 101 detects that the line status of all or part of E1 circuit is normal again, and when continuing normal in Postponement module 103 predetermined time T, be normal E1 circuit by video/audio code stream communication from IP line switching loop line line state, Postponement module 103 is connected with detection module 101, during for detecting that the line status of all or part of E1 circuit is normal when detection module 101, timing is started according to predetermined time T, and when detection module 101 is in this predetermined time T, first time when detecting that the line status wherein having an E1 circuit at least is fault again, then stops timing.
The line switching strategy that the control module of the automatic circuit changeover apparatus of present embodiment is formulated also comprises: detect that the line status of part E1 circuit is fault when at the beginning, adopt the mode of the video/audio code stream traffic rate reducing communication two ends, thus reduce the bandwidth used; And when detect in this faulty component E1 circuit have at least the line status of an E1 circuit recover normal time, adopt promote communication two ends video/audio code stream traffic rate; Then line switching module 102 is also for when the line status of part E1 circuit is fault, for the E1 circuit that open-circuit line state is fault, line status is adopted to be that normal E1 circuit carries out video/audio code stream communication, namely adopt the mode of reduction of speed to reduce the bandwidth of use, and ought again be checked through in the part E1 circuit of this fault, when having at least the line status of an E1 circuit to recover normal, then adopt all line statuss to be that normal E1 circuit communicates, namely adopt the mode of the video/audio code stream traffic rate promoting communication two ends.
In one specific embodiment of present embodiment, if line status is normal E1 circuit n bar, when promoting/reduce the speed of video/audio code stream communication at communication two ends, the traffic rate at communication two ends is no more than n*2Mbps; And if the traffic rate of communication two ends after reduction of speed the latter raising speed is lower than MCU (MutipointControl Unit, multipoint control unit) conference rate that configures, then multipoint control unit carries out adaptation processing to the video/audio code stream between communication equipment each in meeting.
In one specific embodiment of present embodiment, n bar E1 circuit is had when between communication two ends, when there being an E1 line fault, then line switching module 102 disconnects this E1 circuit, thus become n-1 bar E1 circuit from n bar E1 circuit between communication two ends, traffic rate reduces, thus reduces the bandwidth of use; When another bar E1 line fault, then line switching module 102 disconnects this E1 circuit, thus become n-2 bar E1 circuit from n-1 bar E1 circuit between communication two ends, traffic rate reduce further, and reduce further the bandwidth of use, the like, when whole E1 line fault, then direct by whole E1 line switching to IP circuit, and when having the line status of one or two E1 circuit to revert to normal in 2 E1 circuits of this fault, then this employing line status is for this n-1 bar E1 circuit or n bar E1 circuit communicate normally.
In the another embodiment of present embodiment, when communication two ends between have n bar E1 circuit, after line switching to IP circuit, when detection module has detected that an E1 circuit is normal, then line switching module 102 by IP line switching to this E1 circuit; When detecting that again an E1 circuit is normal, then by these normal two E1 line traffics, thus become 2 E1 circuits from 1 E1 circuit between communication two ends, communication speed improves, and further increase the bandwidth of use, the like, when whole E1 circuit is normal, then directly adopt whole E1 circuit to communicate.
The line status of the E1 circuit of present embodiment comprises fault with normal.
The checking module of present embodiment comprises end-to-end judgement submodule and line status determination submodule, and wherein, end-to-end judgement submodule, for adopting end-to-end line status judgment model, judges the E1 circuit that communicates between two ends whether fault; Line status determination submodule, be connected with this end-to-end judgement submodule, for when this end-to-end judgement submodule judges E1 line fault, the line status determining this E1 circuit communicated between two ends is fault, and when this end-to-end judgement submodule judges this E1 circuit fault-free, determine that the line status of this E1 circuit between these communication two ends is normal.
The E1 circuit adopting end-to-end circuit shape body judgment model to judge to communicate between two ends in present embodiment whether fault, the working time slot (the 0-15 time slot of E1 circuit and 17-31 time slot) that E1 circuit is all passed through at the two ends that namely communicate sends end-to-end frame alignment synchronization character so that two ends communication equipment judges end-to-end line status.
Present embodiment adopts end-to-end line status judgment model to judge the line status of the E1 circuit communicated between two ends, make communication two ends can learn that whether corresponding E1 circuit is normal simultaneously, if abnormal, then communication two ends can receive end-to-end frame alignment alarm instruction simultaneously, if normal, communication two ends can receive end-to-end frame alignment simultaneously and normally indicate, avoid and adopt common E1 the 0th slot synchronization word alarm judgment model, make communication two ends can not learn E1 line fault simultaneously, and cause communication two ends can not carry out line switching simultaneously, namely present embodiment adopts the judgment model of circuit alarm end to end, make communication two ends can learn corresponding E1 line fault simultaneously, thus carry out line switching simultaneously, and then improve actual speed of switching.
The automatic circuit changeover apparatus of present embodiment is controlled communication two ends by control module 100 and is connected with call setup while of E1 circuit by IP circuit in advance, and adopt E1 circuit to carry out video/audio code stream communication, and formulate corresponding line switching strategy, the line status of primary circuit is detected again in real time by detection module 101, if the line status of part E1 circuit is fault, then adopt the bandwidth reducing the communication speed between communication two ends and use with reduction, if all the line status of E1 circuit is fault, then triggering line switches module 102 by the E1 line switching of current employing is IP circuit, namely present embodiment is connected with call setup while of IP circuit by this E1 circuit in advance by controlling communication two ends, namely open the transmission channel of primary communication channel and spare communication channel in advance simultaneously, make when whole E1 line fault being detected, can immediately by E1 line switching to IP circuit, what namely accelerate circuit switches speed, and have the line status of an E1 circuit at least for after normal when detection module after line switching 101 detects, start delay module 104, and detect in this Postponement module 104 predetermined time T, line status is that normal E1 circuit all continues normally, be then line status by IP line switching be normal E1 circuit, namely present embodiment adopts and postpones Switchover mechanism, avoids when immediately IP line switching being returned E1 circuit, the line switching frequently caused due to the instability of E1 circuit.
Postponement module in present embodiment is clock, can certainly for playing other modules or the device of phase same-action in the present embodiment.
Based on above-mentioned automatic circuit changeover apparatus, present embodiment also provides a kind of automatic circuit reverse method of TV conference system.
Please refer to Fig. 2, is the flow chart of an embodiment of the automatic circuit reverse method of the TV conference system of present embodiment.The automatic circuit reverse method of the TV conference system of present embodiment comprises:
S201, communication two ends are connected with call setup while of at least one E1 circuit by IP circuit in advance.
E1 circuit in present embodiment is primary circuit, and IP circuit is extension wire.Communication two ends in present embodiment are connected with call setup while of E1 circuit by IP circuit in advance, that is to say that the equipment (terminal or MCU) at circuit two ends all can be called out by E1 circuit and IP circuit, namely on E1 circuit, H.221 frame synchronization is carried out, H.323, IP circuit is called out, capabilities exchange, and the logical channel opening video, audio frequency, data.
S203, current employing E1 circuit carries out video/audio code stream communication.
Current employing E1 circuit in present embodiment carries out communicating and that is to say current the transmitting-receiving carrying out video, audio frequency, data code flow on primary circuit and E1 circuit; Extension wire and IP circuit do not carry out the transmitting-receiving of code stream.
Communicate in the automatic circuit reverse method of present embodiment two ends in advance by connect IP circuit and E1 circuit simultaneously call setup be connected, namely by opening the transmission channel of alternate communication channels and primary communication port simultaneously, make when whole E1 line fault, IP circuit can be switched at once, when avoiding the transmission channel only opening primary communication port, after whole E1 line fault, after whole E1 circuit must be disconnected, reconnect IP circuit, namely again by IP line call-up (H.323 calling out on IP circuit), capabilities exchange, and open video, audio frequency, the logical channel of data, and the line switching speed caused is low, thus accelerate the speed of line switching.
S205, detects the line status of every bar E1 circuit in real time, judges whether that the line status of at least one E1 circuit is fault, if then perform step S207, otherwise continuation execution detects in real time.
In present embodiment, the line status of E1 circuit comprises fault with normal.
The line status of E1 circuit is detected in one specific embodiment of present embodiment, thus judge whether to have the line status of E1 circuit to be fault, its testing process is that the line status of the E1 circuit communicated between two ends is as fault or normal by adopting end-to-end line status judgment model to judge, if fault, then communication two ends can receive end-to-end frame synchronization alarm instruction simultaneously, if normal, the two ends that then communicate can receive end-to-end frame synchronization simultaneously and normally indicate, avoid and adopt common E1 the 0th slot synchronization word alarm judgment model, make communication two ends can not learn E1 line fault simultaneously, and cause communication two ends can not carry out line switching simultaneously, namely present embodiment adopts the judgment model of circuit alarm end to end, make communication two ends can learn corresponding E1 line fault simultaneously, thus carry out line switching simultaneously, and then improve actual speed of switching.
S207, judges whether that the line status of whole E1 circuit is fault, if so, then performs step S209a, otherwise performs step S209b.
Please refer to Fig. 5, due under the networking model with ATM switch, when only having an equipment, when such as, terminal on the left of switch or MCU to switch E1 circuit break down, terminal then on the left of this or MCU have the alarm of E1 line synchronization word, but the terminal on the right side of switch or MCU then can not receive the alarm of E1 line synchronization word, namely the terminal at two ends of communicating or MCU can not communicate on this E1 circuit, although left side receive alarm after can carry out line switching, but because the terminal of right-hand member or MCU do not receive alarm, line switching can not be carried out at once, thus on the contrary the terminal of switch both sides or MCU can not communicate.
When present embodiment is by this end-to-end synchronization character alarm judgment model, when judging that this E1 circuit breaks down, communication two ends can obtain end-to-end circuit alarm simultaneously, thus carry out subsequent treatment and carry out corresponding line switching, avoid communication two ends and can not receive alarm instruction simultaneously, namely can not carry out the problem of line switching simultaneously.
End-to-end line status judgment model in present embodiment refers in the load of 1-31 time slot, add self-defining information field, thus the interference of ATM switch networking can be got rid of, namely the working time slot (the 0-15 time slot of E1 circuit and 17-31 time slot) that two ends all pass through E1 circuit that communicates sends end-to-end frame alignment synchronization character, so that two ends communication equipment judges that whether end-to-end circuit is unimpeded, if not smooth, then communication two ends can receive end-to-end frame alignment alarm instruction simultaneously, thus judge that end-to-end line status is fault, if unimpeded, then communication two ends receive end-to-end normal instruction, thus judge that end-to-end line status is normal.
S209a, by video/audio code stream communication from current E1 line switching to IP circuit, performs step S211.
S209b, adopts line status to be normal E1 line traffic, namely adopts the mode of reduction of speed, performs step S207.
Be the E1 circuit of fault by open-circuit line state in present embodiment, adopt line status to be normal E1 line traffic, the mode namely by reducing communication speed reduces the bandwidth of use.
After reducing the traffic rate at communication two ends in present embodiment, the conference rate that the traffic rate at these communication two ends configures lower than MCU, then carry out corresponding rate adapted by MCU according to the corresponding circuit between this terminal to other-end.
S211, whether real-time detection has at least the line status of an E1 circuit to be normal, if so, then performs step S213, otherwise continues to detect in real time.
In one specific embodiment of present embodiment, when detecting that the line status having an E1 circuit at least is normal, be normal E1 circuit by IP line switching loop line line state, and whether the line status detecting other E1 circuits is in real time normal simultaneously, if, be then that normal all E1 circuits communicate by line status, namely the mode by promoting communication speed improves the bandwidth of use, and after circuit switched, namely after promoting the traffic rate at communication two ends, the conference rate that the traffic rate at these communication two ends configures lower than MCU, then carry out corresponding rate adapted by MCU according to the corresponding circuit between this terminal to other-end.
In another specific embodiment of present embodiment, only having when detecting that the line status of whole E1 circuits is normal, is just normal E1 circuit by video/audio code stream communication from IP line switching loop line line state.
S213, judges in preset time T, and the line status detected is whether the line status of normal E1 circuit continues normal, if so, then performs step S215, otherwise, perform step S211.
In one embodiment of the automatic circuit switchover mode of present embodiment, judge whether that the line status of at least one E1 circuit is normal step, that whether the line status of the every bar E1 circuit communicated between two ends is normal by adopting end-to-end line status judgment model to judge, and in the time T preset, communication two ends do not receive end-to-end frame alignment alarm instruction, namely to be that the line status of normal E1 circuit all continues in presetting time T normal for this line status, the IP line switching loop line line state of current employing is normal E1 circuit by, namely adopt and postpone Switchover mechanism, avoid in time detecting that E1 circuit recovers all normally immediately IP circuit to be reverted to E1 circuit, line switching is frequently caused due to the instability of E1 circuit.
IP line switching loop line line state between communication two ends is normal E1 circuit by S215.
The automatic circuit reverse method of present embodiment is whether the line status of normal E1 circuit continues normal by detecting this line status in preset time T, namely line switching is delayed, thus avoid and ought receive end-to-end frame alignment for the first time and normally indicate, when namely detecting that the line status of E1 circuit recovers normal, when just IP line switching being returned this E1 circuit, cause line switching frequently due to the instability of this E1 circuit at once.
The automatic circuit reverse method of present embodiment is in multiple spot networking situation, and during the line fault alarm that MCU is connected with certain terminal, circuit switching only occurs between this terminal and MCU, and other-end is unaffected.
Certainly principle according to the present embodiment, using IP circuit as master channel, using E1 circuit as alternate channel, and the reverse method between IP circuit according to the present embodiment and E1 circuit carries out line switching, is also understandable.
Be described in detail below in conjunction with the automatic circuit reverse method of specific embodiments and the drawings to the TV conference system of present embodiment.
Please refer to Fig. 3, is the schematic network structure of an embodiment of the TV conference system of the present embodiment.The video conferencing networking of the present embodiment is multiple spot networking, communication two ends are respectively first terminal 301 and MCU303, and second terminal 302 and MCU303, wherein, first terminal 301 and MCU303, and the second terminal 302 and MCU303, all each via optical transmitter and receiver on E1 interface, connected by main line networks such as optical-fiber networks, and this first terminal 301, second terminal is also respectively by Ethernet switch 304 upstream routers, is connected with MCU303 by IP network.
Please refer to Fig. 4, is the flow chart of an embodiment of the automatic circuit reverse method of the TV conference system of present embodiment.Based on above-mentioned multiple spot networking structure, the automatic circuit reverse method of the present embodiment comprises:
S401, first terminal 301 and MCU303, and the second terminal 302 and MCU303 separately between n bar E1 circuit and IP circuit in advance simultaneously call setup be connected.
Be connected by call setup while of respective corresponding n bar E1 circuit and IP circuit in present embodiment, namely first terminal 301 and MCU303 carry out calling out each via corresponding n bar E1 circuit and IP circuit and (on E1 circuit, carry out H.221 frame synchronization, H.323, IP circuit is called out), capabilities exchange, and the logical channel opening video, audio frequency, data; In like manner, second terminal 302 (carries out H.221 frame synchronization to also carrying out calling out each via corresponding n bar E1 circuit and IP circuit between MCU303 on E1 circuit, H.323, IP circuit is called out), capabilities exchange, and the logical channel opening video, audio frequency, data.
S403, first terminal 301 and MCU303, and between the second terminal 302 and MCU303, all adopt n bar E1 circuit to be master channel, IP circuit is alternate channel.Namely on this n bar E1 circuit, all carry out the transmitting-receiving of video, audio frequency, data code flow; Extension wire does not carry out the transmitting-receiving of code stream.
Whether S405, adopts end-to-end line status mode detection first terminal 301 and MCU303, have at least the line status of an E1 circuit to be fault in the n bar E1 circuit between the second terminal 302 and MCU303, if so, then performs step S407, otherwise continues to detect.
S407, judges whether the line status of this n bar E1 circuit between this first terminal 301 and MCU303 is all fault, if so, then performs step S409a, otherwise performs step S409b.
S409a, be IP circuit by this n bar E1 line switching of fault whole between this first terminal 301 and MCU303, namely first terminal 301 carries out video/audio code stream with MCU303 by corresponding IP circuit and communicates, and that is to say the transmitting-receiving logical channel opened at extension wire being carried out data code flow; Perform step S411.
S409b, disconnecting line status between first terminal 301 and MCU303 is the E1 circuit of fault, namely only adopts line status to be that normal E1 circuit carries out video/audio code stream communication, and performs step S405.
Make this remaining line status be that normal E1 circuit has L (L < n) bar in the present embodiment, then the traffic rate between the communication two ends adopting this L bar E1 circuit to carry out video/audio code stream communication is no more than L*2Mbps.
If again detect in real time in the present embodiment, line status between this first terminal 301 and MCU303 is that the line status of normal L bar E1 circuit is when becoming fault, then continue to adopt reduction of speed pattern, namely open-circuit line state is the E1 circuit of fault, and when whole E1 circuits all disconnects, then perform step S409a; If when the line status that the line status detecting between this first terminal 301 and MCU303 is in real time the L bar E1 circuit of fault reverts to normal, then adopt the mode of raising speed, namely adopt current all line statuss to be that normal E1 circuit carries out video and audio communication.
Whether S411, have at least the line status of a circuit E1 circuit to revert to normally in the n bar E1 circuit adopting end-to-end line status judgment model to detect between first terminal 301 and MCU303 in real time, if so, then performs step S413, otherwise, continue to detect.
In the present embodiment, order has the line status of L1 bar E1 circuit to revert to normally, wherein 1 < L1≤n.
In the present embodiment, also can adopt when end-to-end line status judgment model detects that n bar E1 circuit between first terminal 301 and MCU303 is all normal in real time, just execution step S413.
S413, first terminal 301 and MCU303 start 1 timer simultaneously, and start timing.
Adopt 10 seconds timers in the present embodiment, its predetermined time T is 10 seconds, namely needs to detect in 10 seconds of this timer, and whether end-to-end circuit has any alarm.
S415, judges at timer predetermined time T, namely in 10 seconds, whether end-to-end circuit has any alarm, if so, then performs step S417a, otherwise to be namely that the line status of normal E1 circuit all continued in these 10 seconds normal for this line status, and perform step S417b.
In the present embodiment, whether test side has any alarm to end line, and namely whether detection first terminal 301 had any alarm to all E1 circuits of MCU303 in 10 seconds of timer timing, i.e. end-to-end location alarm instruction.
S417a, when obtaining first alarm instruction, stopping this 10 seconds timers, performing step S411.
S417b, the IP line switching between first terminal 301 and MCU303 being returned this line status is normal L1 bar E1 circuit, namely adopts raising speed mode.
Traffic rate between the communication two ends adopting this L1 bar E1 circuit to carry out video/audio code stream communication in the present embodiment is no more than L1*2Mbps.
After adopting the mode of raising speed in present embodiment, if the conference rate that the traffic rate at these communication two ends configures lower than MCU, then carry out corresponding rate adapted by MCU according to the corresponding circuit between this terminal to other-end.
Certainly, when video conference terminal is more, need by MCU cascade, then also can realize backuping each other by the circuit that E1 circuit is different with two kinds, IP circuit between MCU from main MCU.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. the automatic circuit reverse method of a TV conference system, it is characterized in that, comprise between communication two ends and connect IP circuit and E1 circuit simultaneously, described E1 circuit is at least one, wherein said E1 circuit is primary circuit, described IP circuit is extension wire, and described communication two ends are called out simultaneously by described E1 circuit and described IP circuit and connected in advance, and the described E1 circuit of current employing carries out video/audio code stream communication;
Detect the line status of described E1 circuit, if the line status of described E1 circuit is fault, then carries out corresponding line switching according to predetermined line switching strategy, specifically comprise:
Adopt end-to-end frame alignment synchronization character, judge the described E1 circuit that communicates between two ends whether fault, communication two ends can be learnt simultaneously, and whether corresponding E1 circuit is normal, if abnormal, corresponding line switching is carried out according to predetermined line switching strategy in communication two ends simultaneously.
2. the method for claim 1, is characterized in that, described predetermined line switching strategy comprises: when the line status of whole E1 circuit is fault, video/audio code stream communication communicated from described E1 line switching to described IP circuit; After video/audio code stream communication is switched to IP circuit, when the line status all or part of described E1 circuit being detected is normal, described E1 circuit is switched back in video/audio code stream communication.
3. method as claimed in claim 2, it is characterized in that, after video/audio code stream communication is switched to IP circuit, when the line status all or part of described E1 circuit being detected is normal, and the line status of this all or part of described E1 circuit, in predetermined time T, all continue normal, then video/audio code stream communication is switched back described E1 circuit and communicate.
4. method as claimed in claim 2 or claim 3, it is characterized in that, described predetermined line switching strategy also comprises: when the line status of the described E1 circuit of part is fault, reduces the video/audio code stream traffic rate at communication two ends.
5. method as claimed in claim 4, is characterized in that, if the conference rate that the traffic rate of communication two ends after reduction of speed configures lower than multipoint control unit, then multipoint control unit carries out adaptation processing to the video/audio code stream between communication equipment each in meeting.
6. method as claimed in claim 5, it is characterized in that, described predetermined line switching strategy also comprises: when in E1 circuit fault being detected, when having at least the line status of an E1 circuit to revert to normal, promote the video and audio communication speed at communication two ends, if and the conference rate that the communication traffic rate of two ends after raising speed configures lower than multipoint control unit, then multipoint control unit carries out adaptation processing to the video/audio code stream between communication equipment each in meeting.
7. an automatic circuit changeover apparatus for TV conference system, communication comprises IP circuit and E1 circuit between two ends, and described E1 circuit is at least one, and wherein said E1 circuit is primary circuit, and described IP circuit is extension wire; It is characterized in that, described automatic circuit changeover apparatus comprises control module, detection module and line switching module, wherein,
Described control module, connect described IP circuit and described E1 circuit for controlling communication two ends simultaneously, and called out by described E1 circuit and described IP circuit in advance simultaneously, and adopt described E1 circuit to carry out video/audio code stream communication, simultaneously, trigger described detection module to detect in real time described E1 circuit, and formulate corresponding line switching strategy according to described IP circuit and described E1 circuit, and send to described detection module, described line switching strategy is when the line status of whole described E1 circuit is fault, by video/audio code stream communication from the described E1 line switching of current employing to described IP circuit, when after line switching, when the line status all or part of described E1 circuit being detected is normal, be normal described E1 circuit by video/audio code stream communication from described IP line switching loop line line state,
Described detection module, be connected with described control module, for detecting the line status of described E1 circuit in real time, if the line status of described E1 circuit is fault, then triggers the described line switching strategy that described line switching module formulates according to described control module and carry out corresponding line switching;
Described line switching module, is connected with described detection module, during for detecting that when detection module the line status of described E1 circuit is fault, carries out corresponding line switching according to described line switching strategy;
Described detection module comprises end-to-end judgement submodule and line status determination submodule, describedly end-to-endly judges that submodule is for the described E1 circuit that adopts end-to-end frame alignment synchronization character and judge to communicate between two ends whether fault; Described line status determination submodule, be connected with described end-to-end judgement submodule, for when described end-to-end judgement submodule judges described E1 line fault, the line status determining the described E1 circuit between described communication two ends is fault, and when described end-to-end judgement submodule judges the described E1 circuit fault-free communicated between two ends, determine that the line status of the described E1 circuit between described communication two ends is normal.
8. device as claimed in claim 7, is characterized in that, also comprise Postponement module; Described detection module is also for after being switched to IP circuit by video/audio code stream communication, when detecting that the line status of all or part of described E1 circuit reverts to normal, trigger described Postponement module to schedule T start timing, and for detecting all or part of line status recovering normal E1 circuit, in described scheduled time T, whether continue normal, if so, then triggering described line switching module by described IP line switching loop line line state is normal described E1 circuit; Described Postponement module is connected with described detection module, for detecting when described detection module, after described E1 line switching is IP circuit, when the line status of all or part of described E1 circuit reverts to normal, starts timing according to predetermined time T; Described line switching module is also for detecting when described detection module, and in described scheduled time T, the line status of all or part of E1 circuit all continues normal, be then normal described E1 circuit by described IP line switching loop line line state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110255335.4A CN102325245B (en) | 2011-08-31 | 2011-08-31 | The automatic circuit reverse method of TV conference system and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110255335.4A CN102325245B (en) | 2011-08-31 | 2011-08-31 | The automatic circuit reverse method of TV conference system and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102325245A CN102325245A (en) | 2012-01-18 |
| CN102325245B true CN102325245B (en) | 2015-08-26 |
Family
ID=45452908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110255335.4A Expired - Fee Related CN102325245B (en) | 2011-08-31 | 2011-08-31 | The automatic circuit reverse method of TV conference system and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102325245B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739982A (en) * | 2012-05-29 | 2012-10-17 | 浙江大华技术股份有限公司 | Digital video matrix cascade system as well as communication device and method thereof |
| CN107317995A (en) * | 2016-04-26 | 2017-11-03 | 中兴通讯股份有限公司 | A kind of MCU cascade structures and its control method and control system |
| CN108040218A (en) * | 2017-12-20 | 2018-05-15 | 苏州科达科技股份有限公司 | The means of communication and communication apparatus of a kind of video conference |
| CN108418721B (en) * | 2018-05-13 | 2024-05-10 | 刘俊杰 | Broadcast television rebroadcast emergency system based on multi-network hot backup |
| CN110769207B (en) * | 2019-11-19 | 2022-04-01 | 深圳开立生物医疗科技股份有限公司 | Electronic endoscope signal transmission method, device, equipment and system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100559866C (en) * | 2007-07-23 | 2009-11-11 | 杭州华三通信技术有限公司 | A kind of changing method of video terminal and multipoint control unit |
| CN100550760C (en) * | 2007-10-16 | 2009-10-14 | 中兴通讯股份有限公司 | A kind of video conference terminal and mixing network method thereof |
| CN101321087B (en) * | 2008-07-01 | 2010-12-15 | 杭州华三通信技术有限公司 | Backup network switching method, system and device |
| CN101510990A (en) * | 2009-02-27 | 2009-08-19 | 深圳华为通信技术有限公司 | Method and system for processing remote presentation conference user signal |
| CN101557498B (en) * | 2009-05-21 | 2011-03-16 | 中兴通讯股份有限公司 | Method and device for controlling videoconference terminal communication |
| CN101895716B (en) * | 2010-05-25 | 2014-11-05 | 中兴通讯股份有限公司 | Circuit switching method for remote presence system and multi-point control unit |
-
2011
- 2011-08-31 CN CN201110255335.4A patent/CN102325245B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102325245A (en) | 2012-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102325245B (en) | The automatic circuit reverse method of TV conference system and device | |
| CN101510991B (en) | Method, system and multi-point control unit for implementing port thermal backup of video signal conference | |
| CN102014019B (en) | Aggregated link switching method and device | |
| CN102075390B (en) | Transmission state detection method and related device thereof | |
| CN104639867B (en) | A kind of video conference restoration methods and system | |
| GB2444170A (en) | Ethernet protection using a redundant link, with link up of a remote port being triggered using a "link status control mechanism". | |
| WO2011137797A1 (en) | Method and system for data transmission in ethernet | |
| CN106888142B (en) | E1 double-ring network with ring self-healing function | |
| CN111669255A (en) | Loopback test method, device, circuit, equipment and medium for communication equipment network port | |
| CN101895447A (en) | SIP (Session Initiation Protocol) trunk gateway and failure monitoring method thereof | |
| CN101931550A (en) | Method and device for synchronizing main and standby main control boards | |
| CN100563201C (en) | A kind of method for detecting route unit fault and device | |
| CN106100988A (en) | A kind of realize the method that link aggregation is switched fast | |
| CN101764731A (en) | Ethernet ring network algorithm switching method | |
| CN113645312B (en) | Sub-ring network link protection method and device based on ERPS protocol | |
| WO2012159570A1 (en) | Link switchover method and apparatus | |
| CN1512675A (en) | Conversion method for main and spare communication channels | |
| CN101667863B (en) | Device and method for enhancing channel alarm triggering in multiplex section shared ring net protection | |
| CN102025437A (en) | Method, system and device for protection switching | |
| CN1855838B (en) | Interface inverting method | |
| CN114401038B (en) | 5G fusion network shunting method and device based on optical bypass protection | |
| CN103840965B (en) | Method for enhancing quick fault convergence in RSTP | |
| CN210222738U (en) | Interrupt reconnection quick response device and communication equipment | |
| CN101465767B (en) | Alarm detection method and device for medium gateway network interface | |
| CN107579770B (en) | Communication network system, shunt device and method for accessing unidirectional transmission network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 518055 Guangdong city of Shenzhen province Nanshan District Xili town tea light road on the south side of Shenzhen integrated circuit design and application of Industrial Park 306-1, 307, 407, 409. Applicant after: SHENZHEN DVISION VIDEO Co.,Ltd. Address before: 518057, No. 2, No. 2, No. 402-406, No. fourth, No. fifth, No. 501-503, West West Road, North West Zone, Shenzhen hi tech Zone, Guangdong Applicant before: SHENZHEN DVISION VIDEO Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Nanshan District Xili Street Tea Light Road Shenzhen City, Guangdong province 518055 No. 1089 Shenzhen integrated circuit design and application of Industrial Park 306-1, room 307-2, 306-2 Patentee after: Shenzhen Di vision Limited by Share Ltd. Address before: 518055 Guangdong city of Shenzhen province Nanshan District Xili town tea light road on the south side of Shenzhen integrated circuit design and application of Industrial Park 306-1, 307, 407, 409. Patentee before: SHENZHEN DVISION VIDEO Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP02 | Change in the address of a patent holder |
Address after: Room 1202-1203, building 3, R & D building 3, Fangda Plaza, No. 28, Gaofa West Road, Taoyuan community, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Di vision Limited by Share Ltd. Address before: Nanshan District Xili Street Tea Light Road Shenzhen City, Guangdong province 518055 No. 1089 Shenzhen integrated circuit design and application of Industrial Park 306-1, room 307-2, 306-2 Patentee before: Shenzhen Di vision Limited by Share Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20210831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |