CN1592212A - Terminal dynamic turn-on method based on multi-point control unit - Google Patents
Terminal dynamic turn-on method based on multi-point control unit Download PDFInfo
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Abstract
This invention provides a terminal dynamic access method based on amultipoint control unit which divides the said user terminals into a static and a dynamic interactive terminals in the video conference system composed of a multipoint control unit and user terminals and sets single-play static and dynamic access points, and a multicast access point, connects the static interactive terminal with the single-play static access point, connects the dynamic interaction terminal with the multicast access point, the dynamic interaction end sends an acc request to the MCU which receives the request and connects with it transferring multimedia information to the multipoint control unit, then, said MCU cuts off connection between the single-play dynamic acc point and the dynamic interaction end.
Description
Technical field
The present invention relates to the wideband multimedia communication technology, it is particularly related to video conference, video monitoring technology, is a kind of terminal dynamic access method based on multipoint control unit (MCU) concretely.
Background technology
Video conferencing technology is started in the eighties in 20th century, begins large-scale production and application in the nineties in 20th century.H.323 the system of the IP based network communication technology is owing to be applicable to the network communication platform of block exchange mode, IP network communications platform particularly, and it is low to have resources occupation rate, networking flexibility, advantage such as implement and operation cost is low, so become the mainstream technology standard in this field gradually.Mainly comprise two kinds of products based on the system of standard H.323: multipoint control unit (MCU:Multipoint Control Unit) and terminal.The function that MCU mainly realizes comprises: multiple spot connects, multiple spot is controlled, the synthetic and forwarding of multiple spot data.Generally, pass through multi-medium datas such as mode of unicast interactive video, audio frequency between MCU and the each point.Terminal is the ustomer premises access equipment of video conference, and the main function that realizes comprises: the reception of information datas such as voice, image and transmission, and communicate to connect (be connected to another terminal constitute two side communication of point-to-point or be connected to MCU participate in multi-point).The user uses terminal to watch the image of other points, listens to the sound of other points, and oneself sound and image sent to MCU and handle.With the MCU use of cooperating with terminal equipment, just can be that a multiple spot, real-time, mutual communication environment are built in the video conference that has a plurality of points to participate in.
Be no more than in number of access point under the situation of certain limitation, prior art can realize stable smooth multi-point really.But in actual applications, well beyond this restriction, this has limited the application of video technique to participant's quantity to a great extent through regular meeting.For instance, for a meeting that has 100 people to participate in, just have 100 user terminals and MCU exchange multimedia data.Suppose that each terminal and the needed bandwidth of MCU swap data all are 1Mbps, MCU just must possess the ability of sending and receiving and processing 100Mbps data transfer rate so, and this data-handling capacity and network bandwidth resources to MCU has all proposed stern challenge.Certainly, the simplest direct solution is upgrading MCU, makes it can handle access point more than 100, but that such cost that increases is most of users is all unaffordable.In addition, the voice and video data that irrelevant access point sent also can cause white elephant to network, even may cause the total collapse of whole system.
Summary of the invention
The objective of the invention is to, a kind of terminal dynamic access method based on multipoint control unit is provided,, significantly improve MCU and handle the ability that multiple spot inserts with under the prerequisite of limited increase cost; The present invention relies on international standard, and the Related product in complete compatible present technique field promotes the application solution of this technical field comprehensively, thereby enlarges the range of application of video conferencing technology and product.
Technical scheme of the present invention is:
A kind of terminal dynamic access method based on multipoint control unit, it is divided into static interactive terminal and dynamic interaction terminal to described user terminal in the video conferencing system of being made of multipoint control unit and user terminal; And the static access point of clean culture, the dynamic access point of clean culture and multicast access point be set on described multipoint control unit;
The static access point of described static interactive terminal and described clean culture is connected;
Described dynamic interaction terminal is connected with described multicast access point;
Described dynamic interaction terminal is sent clean culture to described multipoint control unit and is inserted request, described multipoint control unit is accepted this access request, and by the dynamic access point of the clean culture of self with send the dynamic interaction terminal that clean culture inserts request and be connected, this dynamic interaction terminal transmits multimedia messages to described multipoint control unit, after this multimedia messages transmitted and finishes, described multipoint control unit was with the be connected disconnection of the dynamic access point of clean culture with described dynamic interaction terminal.
Comprise in that the dynamic access point of clean culture is set on the described multipoint control unit: dynamic access control module is set on described multipoint control unit, and this dynamic access control module is carried out following steps:
Real-time listening inserts request from the clean culture of described dynamic interaction terminal;
When receiving a clean culture access request, adopt communication protocol and the dynamic interaction terminal of sending request to carry out capability negotiation and Control on Communication, set up the full duplex unicast communication channels between multipoint control unit and this dynamic interaction terminal, this full duplex unicast communication channels comprises control channel, voice channel and picture channel;
The notice multipoint control unit uses newly-built described full duplex unicast communication channels to send the meeting-place information data to this dynamic interaction terminal;
When receiving the disconnection request, remove multipoint control unit with the unicast communication channels between this dynamic interaction terminal, and the notice multipoint control unit stops to send the meeting-place information data to this dynamic interaction terminal.
The multicast access point is set on described multipoint control unit to be comprised: in multipoint control unit, a multicast transmission module is set; This multicast transmission module receiver, video meeting-place information data, and this information data sent by multicast channel.
The multicast access point is set on described multipoint control unit to be comprised: a multicast transmission device is set, this multicast transmission device is connected with described multipoint control unit, this multicast transmission device receiver, video meeting-place information data, and this information data sent by multicast channel.
Comprise in that the dynamic access point of clean culture is set on the described multipoint control unit: dynamic access control module is set on described multipoint control unit, and this dynamic access control module is carried out following steps:
Real-time listening inserts request from the clean culture of described dynamic interaction terminal; When receiving a clean culture access request, adopt communication protocol and the dynamic interaction terminal of sending request to carry out capability negotiation and Control on Communication, set up the full duplex unicast communication channels between multipoint control unit and this dynamic interaction terminal, this full duplex unicast communication channels comprises voice channel, picture channel and control channel; The notice multipoint control unit uses newly-built described full duplex unicast communication channels to send the meeting-place information data to this dynamic interaction terminal; When receiving the disconnection request, remove multipoint control unit with the unicast communication channels between this dynamic interaction terminal, and the notice multipoint control unit stops to send the meeting-place information data to this dynamic interaction terminal;
The multicast access point is set on described multipoint control unit to be comprised: in multipoint control unit, a multicast transmission module is set; This multicast transmission module receiver, video meeting-place information data, and this information data sent by multicast channel;
The multicast access point is set on described multipoint control unit to be comprised: a multicast transmission device is set, this multicast transmission device is connected with described multipoint control unit, this multicast transmission device receiver, video meeting-place information data, and this information data sent by multicast channel.
In described user terminal inside, a seamless switching module is set, this seamless switching module is carried out following steps:
Real-time listening when receiving a request, sends the request of access by call communication to the dynamic access control module of multipoint control unit from user's access request;
Through after the Signalling exchange, set up the full duplex unicast communication channels between local terminal and the multipoint control unit;
The data reception module of notice local terminal switches to the unicast tunnel of newly setting up with receive channel from multicast channel;
Capturing and coding is carried out to the image and the sound of this locality in the notice local terminal, sends by newly-built unicast tunnel then;
After user's speech finishes, send the request of disconnection by this local terminal, after receiving the request of disconnection, described seamless switching module at first notifies the data reception module of this local terminal that receive channel is switched to multicast channel from unicast tunnel, and sends the request of disconnection to multipoint control unit;
After the affirmation that obtains from the dynamic access control module of multipoint control unit, the unicast communication channels between this local terminal and the multipoint control unit is removed in collection, coding and transmit operation that the seamless switching module notifies this local terminal to stop local data.
Described multipoint control unit disconnects being connected of dynamic access point of clean culture and described dynamic interaction terminal and comprises: adopt the first in first out strategy, promptly disconnect the longest user's connection turn-on time.
Described multipoint control unit disconnects dynamic access point of clean culture and being connected of described dynamic interaction terminal and comprises: adopt lru algorithm, disconnect the longest user of quiet hour and connect.
In the video conferencing system of forming by multipoint control unit and user terminal, can adopt the mode of cascade to constitute multistage cascade structure with main multipoint control unit with from multi-point control unit cascading.Master and slave multipoint control unit all can possess the dynamic access function of above-mentioned terminal.Its main points are: arbitraryly can only be connected with the static access point of the clean culture of described main multipoint control unit from multipoint control unit.
Effect of the present invention is:
Owing to adopted dynamic access technology and multicasting technology, therefore greatly reduce the transmission quantity of data, alleviate the burden of network, thereby reduced the possibility of system crash.Use dynamic access technology to make MCU needn't handle the information data of uncorrelated access point, thereby reduced requirement the MCU data-handling capacity.Realized large-scale multipoint videoconference environment with relatively low cost.Rely on international standard, the product of fully compatible this technical field.Promote the application solution of video conferencing technology comprehensively, enlarge the application of video conferencing technology greatly.
Description of drawings
Fig. 1 is traditional static allocation access way block diagram;
Fig. 2 a is that static allocation adds dynamic access channel block diagram;
Fig. 2 b is that static allocation adds the concrete channel block diagram of implementing of dynamic access;
Fig. 3 is the workflow diagram of the dynamic access control module of MCU inside terminals;
Fig. 4 is the workflow diagram of the inner seamless switching module of user terminal.
Embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention:
Invention thought of the present invention is: in most cases, have only the sub-fraction participant to make a speech in meeting, most people serve as audience's role always in whole conference process.In other words, they only need to receive the meeting-place information data, and there is no need fully oneself sound and image information are sent to MCU.Therefore, the terminal that we have adopted a kind of traditional static allocation (as shown in Figure 1) to add dynamic requests (as shown in Figure 2) inserts thought, the user terminal that promptly only be the very little important participant of ratio is set up fixing unicast tunnel, and distributes N terminal accessing-point dynamically for other participants.When common participant wished speech in conference process, MCU can be connected to his user terminal on these dynamic access points; When he finishes to make a speech, his user terminal is disconnected from dynamic access point, there is the user who needs to use for other.If the situation that does not have idle access point to use, can adopt following several strategy to handle: (First In First Out, FIFO) strategy promptly disconnect turn-on time the longest user and connect to adopt first in first out; Adopt LRU (least recently used) algorithm, disconnect the longest user of quiet hour and connect; Also can adopt priority to add timeslice in conjunction with the method for using.This scheme can reduce the demand to network bandwidth resources and MCU disposal ability greatly.
Embodiment: dynamic access control module of terminal and multicast transmission module are set in the MCU inside of standard, and the seamless switching module is set on the standard terminal.The dynamic access control module of MCU terminal is responsible for monitoring access or the disconnection request from user terminal, sets up and remove the unicast communication channels between MCU and the request user terminal.The multicast transmission module is responsible for sending the meeting-place information data, and common participant only need watch the meeting field picture and listen to meeting-place sound usually by multicast channel, and only just can be linked on the dynamic access point to the request of MCU control module in the hope speech.Seamless switching module on the user terminal is responsible for initiating to insert or disconnect request, the unicast communication channels of setting up and removing MCU and user terminal, and the switching back and forth of unicast communication channels and cast communication interchannel.
The dynamic access control module of MCU terminal:
In the MCU of standard equipment, place a dynamic access control module of terminal (as shown in Figure 3).Its groundwork flow process is described below:
1. dynamically the access control module continues access or the disconnection request of monitoring from user terminal.
2. when receiving an access request, control module uses corresponding communication agreement and requesting terminal to carry out capability negotiation and Control on Communication, thereby set up the full duplex unicast communication channels between MCU and the user terminal, comprise voice channel, picture channel and control channel.
3. after setting up good above-mentioned channel, dynamically access control module notice MCU uses newly-built channel to send the meeting-place information data to user terminal.
4. when receiving user's disconnection request, this module is removed MCU with the unicast communication channels between the user terminal, and notice MCU stops to send the meeting-place information data to user terminal.
The multicast transmission module:
At the MCU device interior, the multicast transmission module of a special use is set.It is responsible for receiving the meeting-place information data, and its multicast channel by special use is sent.The implementation of multicast transmission module is very flexible: both can be used as independently hardware device realization, also can be used as special software module.
The seamless switching module of user terminal:
In user terminal inside, place a seamless switching module (as shown in Figure 4).The groundwork flow process of this module is described below:
1. continue to monitor access request from the user.When receiving a request, the seamless switching module is enabled the call communication control module and is sent the request of access to the dynamic access control module of the terminal of MCU.
2. the seamless switching module is set up the full duplex unicast communication channels between local terminal and the MCU after through a series of Signalling exchanges such as capability negotiations.
3. then, the data reception module of seamless switching module notice terminal switches to the unicast tunnel of newly setting up with receive channel from multicast channel.
4. then, the notice terminal is carried out capturing and coding to the image and the sound of this locality, sends by newly-built unicast tunnel then.
5. after user's speech finishes, can send the request of disconnection by terminal.After receiving the request of disconnection, the seamless switching module at first notifies the data reception module of terminal that receive channel is switched to multicast channel from unicast tunnel, and sends the request of disconnection to MCU.
6. after the affirmation that obtains from the MCU control module, seamless switching module notice terminal stops collection, coding and the transmit operation of local data, removes the unicast communication channels between user terminal and the MCU then.
Advantage and effect that the relative prior art of the present invention has are:
Owing to adopted dynamic access technology and multicasting technology, therefore greatly reduce the data transfer amount, Alleviate the burden of network, thereby reduced the possibility of system crash.
Use the dynamic access technology so that MCU needn't process the information data of uncorrelated access point, thereby fall Low requirement to the MCU data-handling capacity.
Realized large-scale multipoint videoconference environment with relatively low cost.
Rely on international standard, the product of fully compatible existing and following this technical field.
The application solution of General Promotion video conferencing technology enlarges answering of video conferencing technology greatly Use the field.
The above specific embodiment only is used for explanation the present invention, but not is used for limiting the present invention.
Claims (9)
1. the terminal dynamic access method based on multipoint control unit is characterized in that, in the video conferencing system of being made up of multipoint control unit and user terminal, described user terminal is divided into static interactive terminal and dynamic interaction terminal; And the static access point of clean culture, the dynamic access point of clean culture and multicast access point be set on described multipoint control unit;
The static access point of described static interactive terminal and described clean culture is connected;
Described dynamic interaction terminal is connected with described multicast access point;
Described dynamic interaction terminal is sent clean culture to described multipoint control unit and is inserted request, described multipoint control unit is accepted this access request, and by the dynamic access point of the clean culture of self with send the dynamic interaction terminal that clean culture inserts request and be connected, this dynamic interaction terminal transmits multimedia messages to described multipoint control unit, after this multimedia messages transmitted and finishes, described multipoint control unit was with the be connected disconnection of the dynamic access point of clean culture with described dynamic interaction terminal.
2. method according to claim 1 is characterized in that, comprises in that the dynamic access point of clean culture is set on the described multipoint control unit: dynamic access control module is set on described multipoint control unit, and this dynamic access control module is carried out following steps:
Real-time listening inserts request from the clean culture of described dynamic interaction terminal;
When receiving a clean culture access request, adopt communication protocol and the dynamic interaction terminal of sending request to carry out capability negotiation and Control on Communication, set up the full duplex unicast communication channels between multipoint control unit and this dynamic interaction terminal, this full duplex unicast communication channels comprises control channel, voice channel and picture channel;
The notice multipoint control unit uses newly-built described full duplex unicast communication channels to send the meeting-place information data to this dynamic interaction terminal;
When receiving the disconnection request, remove multipoint control unit with the unicast communication channels between this dynamic interaction terminal, and the notice multipoint control unit stops to send the meeting-place information data to this dynamic interaction terminal.
3. method according to claim 1 is characterized in that, the multicast access point is set on described multipoint control unit comprises: in multipoint control unit, a multicast transmission module is set; This multicast transmission module receiver, video meeting-place information data, and this information data sent by multicast channel.
4. method according to claim 1, it is characterized in that, the multicast access point is set on described multipoint control unit to be comprised: a multicast transmission device is set, this multicast transmission device is connected with described multipoint control unit, this multicast transmission device receiver, video meeting-place information data, and this information data sent by multicast channel.
5. method according to claim 1 is characterized in that,
Comprise in that the dynamic access point of clean culture is set on the described multipoint control unit: dynamic access control module is set on described multipoint control unit, and this dynamic access control module is carried out following steps:
Real-time listening inserts request from the clean culture of described dynamic interaction terminal; When receiving a clean culture access request, adopt communication protocol and the dynamic interaction terminal of sending request to carry out capability negotiation and Control on Communication, set up the full duplex unicast communication channels between multipoint control unit and this dynamic interaction terminal, this full duplex unicast communication channels comprises voice channel, picture channel and control channel; The notice multipoint control unit uses newly-built described full duplex unicast communication channels to send the meeting-place information data to this dynamic interaction terminal; When receiving the disconnection request, remove multipoint control unit with the unicast communication channels between this dynamic interaction terminal, and the notice multipoint control unit stops to send the meeting-place information data to this dynamic interaction terminal;
The multicast access point is set on described multipoint control unit to be comprised: in multipoint control unit, a multicast transmission module is set; This multicast transmission module receiver, video meeting-place information data, and this information data sent by multicast channel;
The multicast access point is set on described multipoint control unit to be comprised: a multicast transmission device is set, this multicast transmission device is connected with described multipoint control unit, this multicast transmission device receiver, video meeting-place information data, and this information data sent by multicast channel.
6. method according to claim 5 is characterized in that, in described user terminal inside, a seamless switching module is set, and this seamless switching module is carried out following steps:
Real-time listening when receiving a request, sends the request of access by call communication to the dynamic access control module of multipoint control unit from user's access request;
Through after the Signalling exchange, set up the full duplex unicast communication channels between local terminal and the multipoint control unit;
The data reception module of notice local terminal switches to the unicast tunnel of newly setting up with receive channel from multicast channel;
Capturing and coding is carried out to the image and the sound of this locality in the notice local terminal, sends by newly-built unicast tunnel then;
After user's speech finishes, send the request of disconnection by this local terminal, after receiving the request of disconnection, described seamless switching module at first notifies the data reception module of this local terminal that receive channel is switched to multicast channel from unicast tunnel, and sends the request of disconnection to multipoint control unit;
After the affirmation that obtains from the dynamic access control module of multipoint control unit, the unicast communication channels between this local terminal and the multipoint control unit is removed in collection, coding and transmit operation that the seamless switching module notifies this local terminal to stop local data.
7. method according to claim 5 is characterized in that, described multipoint control unit disconnects being connected of dynamic access point of clean culture and described dynamic interaction terminal and comprises: adopt the first in first out strategy, promptly disconnect the longest user's connection turn-on time.
8. method according to claim 5 is characterized in that, described multipoint control unit disconnects dynamic access point of clean culture and being connected of described dynamic interaction terminal and comprises: adopt lru algorithm, disconnect the longest user of quiet hour and connect.
9. method according to claim 1 or 5 is characterized in that, in the video conferencing system of being made up of multipoint control unit and user terminal, described multipoint control unit is divided into main multipoint control unit and from multipoint control unit;
Adopt the mode of cascade to constitute multistage cascade structure with described main multipoint control unit with from multi-point control unit cascading; Described main multipoint control unit and all can possess the dynamic access function of described terminal from multipoint control unit, wherein: arbitraryly can only be connected with the static access point of the clean culture of described main multipoint control unit from multipoint control unit.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976374B (en) * | 2006-12-08 | 2010-12-22 | 王祥贵 | Radio digital conference system |
| CN101228803B (en) * | 2005-09-06 | 2012-03-28 | 中兴通讯股份有限公司 | Method for fast establishing call in code division multiple access cluster communication system |
| CN102780974A (en) * | 2012-05-17 | 2012-11-14 | 江苏中科梦兰电子科技有限公司 | Method for transmitting data distribution in multimedia session |
| WO2019128266A1 (en) * | 2017-12-28 | 2019-07-04 | 中兴通讯股份有限公司 | Video conference transmission method and apparatus, and mcu |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895719B (en) * | 2010-08-05 | 2012-03-14 | 杭州华三通信技术有限公司 | Method for controlling video playing by utilizing video conference terminal, system and equipment thereof |
-
2003
- 2003-08-28 CN CNB031564615A patent/CN100502295C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101228803B (en) * | 2005-09-06 | 2012-03-28 | 中兴通讯股份有限公司 | Method for fast establishing call in code division multiple access cluster communication system |
| CN1976374B (en) * | 2006-12-08 | 2010-12-22 | 王祥贵 | Radio digital conference system |
| CN102780974A (en) * | 2012-05-17 | 2012-11-14 | 江苏中科梦兰电子科技有限公司 | Method for transmitting data distribution in multimedia session |
| WO2019128266A1 (en) * | 2017-12-28 | 2019-07-04 | 中兴通讯股份有限公司 | Video conference transmission method and apparatus, and mcu |
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