WO2009152762A1 - 多点控制单元级联系统及其通信方法、装置 - Google Patents
多点控制单元级联系统及其通信方法、装置 Download PDFInfo
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- WO2009152762A1 WO2009152762A1 PCT/CN2009/072301 CN2009072301W WO2009152762A1 WO 2009152762 A1 WO2009152762 A1 WO 2009152762A1 CN 2009072301 W CN2009072301 W CN 2009072301W WO 2009152762 A1 WO2009152762 A1 WO 2009152762A1
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- mcu
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- mcus
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- cascading
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004891 communication Methods 0.000 title claims abstract description 21
- 230000006855 networking Effects 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 abstract description 22
- 230000007423 decrease Effects 0.000 abstract 1
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 description 23
- 238000012545 processing Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
- H04N7/152—Multipoint control units therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
- H04L65/403—Arrangements for multi-party communication, e.g. for conferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/562—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities where the conference facilities are distributed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/567—Multimedia conference systems
Definitions
- the present invention relates to the field of communications, and in particular, to a multipoint control unit cascade system, a communication method thereof, a multipoint control unit, and a service management center.
- a multipoint control unit (MCU) can be cascaded with each other.
- MCU2 and MCU4 are hung under MCU1
- MCU3 and MCU5 are hung under MCU2 and MCU4 respectively.
- T31 to T3m are the sites that are mounted under MCU3
- T51 to T5n are the sites that are mounted under MCU5 (m and n are integers greater than 1).
- the MCU has more cascading levels (more than level 2 MCUs)
- the media stream delay caused by the MCU cascading, and the loss of multiple codecs will be severe. Affects audio and video effects.
- the T51 site connected to the MCU5 in Figure 1 receives the media stream from T31 under MCU3. Due to the forwarding of multi-level MCUs in the middle
- Embodiments of the present invention provide a multipoint control unit cascading system, a communication method thereof, a multipoint control unit, and a service management center, to solve the problem of reducing media stream delay and video and audio quality degradation caused by transmission.
- An embodiment of the present invention provides a multi-point control unit MCU cascading system, which includes a plurality of MCUs under the management of a service management center, and a cascading mode between the MCUs in the system is a mesh cascading;
- the MCU is configured to receive information about the conference sent by the service management center;
- the MCU is further configured to schedule the conference according to the information of the conference, establish linked list information of all MCUs to participate in the conference, and join other MCUs to participate in the conference;
- the MCU is further configured to: synchronously obtain site information of the conference according to the linked list information; and the MCU is further configured to send video and audio data according to the site information selection path of the conference.
- the embodiment of the present invention further provides a communication method of a multi-point control unit MCU cascading system, wherein the cascading mode between the MCUs in the system is a network cascading, including the following steps:
- the video and audio data is sent according to the site information selection path of the conference.
- the embodiment of the present invention further provides a multi-point control unit MCU, where the MCU is located in an MCU cascading system, including a creating unit, a synchronizing unit, and a sending unit, and the cascading mode between the MCUs in the system is a network.
- the creating unit is configured to schedule the conference according to the information of the conference sent by the service management center, establish a linked list information of all MCUs to participate in the conference, and join other MCU calls to participate in the conference;
- the synchronization unit is configured to synchronously obtain site information of the conference according to the linked list information;
- the sending unit is configured to send video and audio data according to the site information selection path of the conference.
- the embodiment of the invention further provides a service management center, where the service management center is located at
- the cascading mode between the MCUs in the system is a mesh cascading
- the service management center is configured to send information about the conference to all MCUs in the system that are to participate in the conference, where the information of the conference includes the MCU cascading situation of the conference.
- the MCU cascading situation of the conference includes whether the information and the networking mode of all the MCUs to participate in the conference are mesh cascading, and the information of all the MCUs to participate in the conference includes all MCUs to participate in the conference.
- the embodiment of the present invention is easier to operate than the prior art solution because the connection networking mode between the MCUs in the cascade system is changed to form a mesh cascade structure.
- the cost is not high, and in this networking mode, each MCU can be cascaded with other MCUs, so that the video and audio media streams between different MCUs can be selected according to the connection between the MCUs.
- the minimum transmission path of the MCU can effectively avoid the transmission delay caused by the MCU multiple forwarding and the degradation of the video quality, thereby reducing the transmission time of the media stream and ensuring the playback quality of the media stream.
- FIG. 1 is a schematic diagram of networking of a prior art MCU cascading system
- FIG. 2 is a schematic diagram of networking of an MCU cascading system according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram of an MCU according to an embodiment of the present invention.
- FIG. 4 is a flowchart of a communication method of an MCU cascading system according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of networking of an MCU cascading system according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram of networking of an MCU cascading system according to still another embodiment of the present invention.
- An embodiment of the present invention provides a multipoint control unit cascading system.
- a plurality of MCUs and a service management center (not shown) for managing the plurality of MCUs are provided.
- the cascading mode between these MCUs is a mesh cascading.
- There are multiple sites such as T31 and T3m in the MCU3 (m is an integer greater than 1), and the T51 site is hung under the MCU5.
- the service management center in the system is a functional entity that manages the MCU.
- the user can manage one or more MCUs, set the attribute characteristics of the MCU, and control the MCU to schedule the conference.
- the service management center determines the information of the conference, including the MCU cascading situation of the conference, and the MCU cascading situation includes whether the information and the networking mode of all the MCUs to participate in the conference are mesh cascading, and the conference is to participate in the conference. All MCU information includes all MCUs that will attend the conference.
- the information of all the MCUs that are to participate in the conference further includes the number of all the MCUs that are to participate in the conference;
- the MCU cascading situation of the conference further includes the relationship between the upper and lower levels between the MCU and the MCU connected to the MCU, and And a connection relationship between the MCU and other MCUs that are to participate in the conference.
- the service management center needs to determine the networking mode of each MCU, that is, whether to adopt mesh cascading, specify all MCUs to participate in the conference, and assign the number of each MCU (M).
- the service management center allocates the relationship between the M number of each MCU and the MCU to ensure that there is no conflict between the M number and the MCU.
- the service management center can only determine whether the networking mode of the MCU in the cascading system is mesh cascading, and all MCUs to participate in the conference. Other information is determined by the MCU in the system to participate in the conference: The number of all MCUs in the conference, the relationship between the MCU and the MCU connected to the MCU, the connection relationship between the MCU and other MCUs to participate in the conference. The connection relationship refers to whether the MCU and the other MCUs that are going to participate in the conference are directly connected.
- the service management center is configured to send the information of the conference to each MCU in the system to participate in the conference.
- the cascading mode of each MCU in the system is a network cascading; the conference information includes the MCU of the current cascading conference. Cascade situation.
- the MCU is configured to schedule a conference according to the information of the conference, obtain the MCU cascading situation of the current cascading conference, establish a linked list information of all MCUs to participate in the conference, and establish a cascade port on the MCU, and join the cascading port call;
- the master and slave MCUs need to be confirmed according to the relationship between the upper and lower levels of each MCU.
- the specific implementation may be that the connected upper-level MCU calls the lower-level MCU. Since the information of the foregoing conference includes the MCU cascading situation of the current cascading conference, the linked list information of each MCU is established according to the acquired MCU cascading situation of the current cascading conference.
- the linked list information of the current MCU includes: the number of other MCUs to participate in the conference and the list of conference sites to be connected, the connection path and distance between other MCUs and the current MCU.
- the MCU is further configured to synchronize the site information of the multi-point control unit cascading system according to the linked list information; specifically: the MCU selects the MCU connected thereto according to the linked list information; and sends the site information to the MCU connected thereto; The connected MCU requests the site information of the MCU connected to the MCU. After the MCU receives the site information of the MCU connected to the MCU, the MCU combines the site information with the site information of the MCU to form the site information of the conference.
- the MCU is also used to send video and audio data according to the synchronized site information selection path, and the optimal path can be selected.
- the optimal path may be a combined result of one or more of the following information: The shortest path of the video and audio data transmission selected by the MCU based on the synchronized venue information, the network quality optimal path, and the path with the highest network security. These AV data can be forwarded from different cascade ports of the MCU according to the above requirements.
- each MCU can be cascaded with other MCUs, so that the views between different MCUs are made.
- the transmission path of the MCU can be selected according to the connection condition between the MCUs, the forwarding and transmission delay of the media stream are reduced, and the number of times of encoding and decoding of the media stream on each MCU is also reduced.
- the quality loss of video and audio since the system can be upgraded on the existing MCU device, the circuit does not need to be modified, so the overall scalability is good and easy to implement.
- the embodiment of the present invention further provides a multi-point control unit MCU.
- the MCU is located in an MCU cascade system, including a creation unit, a synchronization unit, a sending unit, and a level between MCUs in the system.
- the connection mode is a mesh cascade.
- the creating unit is configured to schedule the conference according to the information of the conference sent by the service management center, establish a linked list information of all MCUs to participate in the conference, and join other MCU calls to participate in the conference; a synchronization unit, configured to: synchronously obtain site information of the conference according to the linked list information; and the sending unit is configured to send video and audio data according to the site information selection path of the conference.
- the MCU may also negotiate with the MCU connected to the MCU to determine the following one.
- One or more kinds of information the number of all MCUs to participate in the conference, the relationship between the MCU and the MCU connected to the MCU, and the connection relationship between the MCU and other MCUs to participate in the conference.
- the connection relationship refers to whether the MCU is directly connected to other MCUs that are going to participate in the conference.
- the service management center determines the MCU cascading status of all the current cascading conferences, the MCUs to be logged in by the service management center only need to save the MCU cascading status of the current cascading conference.
- the creating unit schedules the meeting according to the information of the meeting sent by the service management center, and establishes linked list information of all MCUs to participate in the meeting, and the other MCU calls to participate in the meeting are specifically: According to the information of the meeting, Obtain the MCU cascading status of the current cascading conference, and establish the linked list information of all MCUs in the conference.
- the linked list information includes the number of other MCUs to participate in the conference, the list of conference sites connected to the MCU, and the connection path and distance between other MCUs and the MCU.
- the synchronization unit obtains the conference site information synchronously according to the linked list information, and more specifically: selects the MCU connected to the MCU according to the linked list information of the MCU; sends the MCU site information to the MCU connected thereto; and requests the site information from the MCU connected thereto
- the MCU After receiving the site information of the MCU connected to the MCU, the MCU combines the site information with its own site information to form the site information of the conference.
- the MCU selects the best path to send the video and audio data according to the synchronized site information, wherein selecting the best path may be a combination of one or more of the following information: the shortest path of the video and audio data selected by the MCU according to the synchronized site information, The network quality optimal path and the path with the highest network security.
- each MCU can be cascaded with other MCUs, so that different When the video and audio media streams between the MCUs are transmitted, the transmission path through the MCU can be selected according to the connection situation between the MCUs, the forwarding and transmission delay of the media streams are reduced, and the media streams are reduced on the MCUs.
- the number of codecs and processing times greatly reduces the quality loss of video and audio.
- the software implementation can be upgraded on the existing MCU device, and the circuit does not need to be modified, so the overall scalability is good and easy to implement.
- the embodiment of the present invention further provides a service management center, which is located in an MCU cascading system, where the cascading mode between the MCUs in the system is a network cascading, and the service management center is used to participate in the conference in the system.
- All MCUs send information about the conference, and the conference information includes the MCU cascading situation of the conference.
- the MCU cascading situation of the conference includes whether the information and networking mode of all MCUs to participate in the conference are mesh cascading, and the information of all MCUs to participate in the conference includes all MCUs to participate in the conference.
- the MCU and the MCU connected to the MCU are also required to determine the following one.
- One or more kinds of information, as the MCU cascading situation of the current cascading conference: the number of all MCUs to participate in the conference, the subordinate relationship between the MCU and the MCU connected to the MCU, and the MCU and other MCUs to participate in the conference The connection between the two.
- the connection relationship refers to whether the MCU and the other MCUs that are going to participate in the conference are directly connected.
- the service management center determines the MCU cascading status of all the current cascading conferences, the MCUs to be logged in by the service management center only need to save the MCU cascading status of the current cascading conference.
- the service management center according to the embodiment of the present invention, because the service management center sends the MCU cascading situation of the current cascade conference to the MCU that it manages to participate in the conference, and specifies the relevant information of the MCU to participate in the conference, This facilitates the subsequent meeting and the delivery of meeting data.
- An embodiment of the present invention further provides a communication method of an MCU cascading system. Referring to FIG. 4, the following steps are included:
- the service management center determines the information of the conference, including the MCU cascading situation of the conference, and the MCU cascading situation includes whether the information and the networking mode of all the MCUs to participate in the conference are mesh-level.
- the information of all MCUs to participate in the conference includes all MCUs to attend the conference.
- the information of all MCUs to participate in the conference also includes the numbers of all MCUs to participate in the conference;
- the MCU cascading situation of the conference also includes the relationship between the MCU and the MCU connected to the MCU, and the MCU and The connection relationship between other MCUs to participate in the conference.
- the service management center sends the conference information to each MCU in the system, and the cascading mode between the MCUs in the system is a network cascading; sending a conference to each MCU in the system.
- the service management center also needs to determine whether the networking mode of the mesh cascading is a mesh cascading, all MCUs to participate in the conference, the number of each MCU, the upper and lower levels between the MCU and the MCU connected to the MCU. Relationship, and the connection between the MCU and other MCUs that are going to participate in the conference.
- the conference information includes the MCU cascading status of the current cascade conference.
- the MCU schedules the conference according to the information of the conference, obtains the MCU cascading situation of the current cascade conference, establishes the linked list information of all MCUs to participate in the conference, and establishes a cascade port on the MCU, which will be cascaded.
- the port call joins the conference.
- the master and slave MCUs need to be confirmed according to the relationship between the upper and lower levels of each MCU.
- the specific implementation may be that the connected upper-level MCU calls the lower-level MCU to join the conference.
- the linked list information of each MCU is established according to the acquired MCU cascading situation of the current cascading conference.
- the linked list information includes the number of other MCUs in the system to participate in the conference and the list of the conference sites to be connected, the connection path and distance between other MCUs and the current MCU.
- the establishment of the linked list information is specifically: each MCU obtains the MCU cascading situation of the current cascade conference according to the information of the conference, Establish linked list information of each MCU in the cascade conference.
- the MCU-level contact system shown in Figure 5 belongs to one of the MCU networking forms in which there is no cascade channel between some MCUs, that is, all MCUs in the system do not form a fully connected network.
- MCU1 is only connected to MCU2 and MCU4;
- MCU2 is connected to MCU3 and MCU4 in addition to MCU1;
- MCU3 is connected to MCU5 in addition to MCU2;
- MCU5 is connected to MCU4 in addition to MCU3.
- the linked list information shown in Table 1 can be formed on the MCU1:
- M is the number of each MCU except MCU1
- m, n, x, and y are integers greater than 1, respectively.
- similar cascading linked list information is also established on other MCUs. Through the linked list information, the connection between each MCU in the system and other MCUs can be realized, so that the MCU cascading situation of the entire cascading conference is prepared.
- the MCU synchronizes the site information of the multi-point control unit cascading system according to the linked list information; specifically: the MCU selects the MCU connected thereto according to the linked list information; the MCU sends the site information to the connected
- the MCU requests the site information of the MCU connected to the MCU to which the MCU is connected.
- the MCU combines the site information with the site information of the MCU to form the site information of the conference. .
- the MCU sends the video and audio data according to the synchronized site information selection path, where the best path may be selected, and the selection process may be a comprehensive result of one or more of the following information:
- the MCU is based on the synchronized site. Shortest path, network quality of video and audio data transmission selected by information The optimal path and the path with the highest network security.
- the current MCU uses the mixing process for the audio, that is, each site sends its own audio data to the MCU, and after the MCU performs the mixing process, the MCU sends the mixed data to each venue. .
- the sound of the cascade port may be mixed multiple times.
- the audio on MCU1 will be sent to MCU2 and MCU3 respectively, and the mix of MCU2 will be sent to MCU3, because each MCU may forward the sound the most. Or the smallest sound, so the MCU2 mix and MCU1 mix received on the MCU3 may contain the same sound, that is, the sound in the MCU1 appears, resulting in accent.
- the audio data sent by the MCU to the cascaded conference site cannot contain audio data from other cascade ports, so that the sound can be repeatedly mixed.
- the audio stream sent by MCU1 to MCU2 does not include audio from the cascade ports of MCU 3, MCU4, and MCU5.
- the method of switching is determined according to the situation of the source site and the destination site in the MCU. If the two conference sites belong to the same MCU, no special processing is required. If the two conference sites belong to different MCUs, the best path for the video data transmission (which may be the shortest path) is selected according to the currently saved MCU linked list information. For example, if the networking mode shown in Figure 5 is used, the linked list information in Table 1 can be queried to find the M number of the destination MCU, and the path between the MCU and the destination MCU can be obtained, and the MCU can be controlled according to the path. Video switching.
- the MCU3 searches for the MCU linked list information after receiving the video switching command. It is found that T31 belongs to MCU3, T51 belongs to MCU5, and MCU3 is the shortest between MCU3 and MCU5. MCU5, so it can be determined that the video transmission path is T31->MCU3->MCU5->T5L
- the line passing through the shortest MCU path between the source site and the destination site may be determined according to the cascading information between the MCUs, and the video data is switched and transmitted according to the line. .
- the MCU of the non-synthesized multi-screen needs to send the video data of the corresponding site to the MCU that synthesizes the multi-screen according to the site distribution of each sub-picture.
- the site on the current MCU belongs to the synthesized sub-picture (MCU) In this case it is MCU1).
- MCU1 the synthesized sub-picture
- the forwarding of video data is the same as described above. It is assumed that the MCU2, the MCU3, the MCU4, and the MCU5 all have the sub-pictures of the composite, and they respectively send the corresponding video data to the MCU1 through the shortest path.
- MCU1 can synthesize multiple pictures and forward multi-picture data to other MCUs.
- the forwarding method is the same as the previous one.
- Embodiments of the present invention also provide a communication method of an MCU cascading system.
- FIG. 6 unlike the MCU cascading system of FIG. 5, in the MCU cascading system in this embodiment, there is no link directly connected between the MCU2 and the MCU4, and the link directly connected between the MCU1 and the MCU5. Replaced by the road. Then, the following linked list information will be formed on MCU1:
- the audio data sent by the MCU to the cascaded conference site cannot contain audio data from other cascade ports.
- the audio stream sent from MCU1 to MCU5 does not include audio from the cascade ports of MCU2 and MCU4.
- MCU switches video data
- the method of switching is determined. If the two conference sites belong to the same MCU, no special processing is required. If the two conference sites belong to different MCUs, the best path for video data transmission (which may be the shortest path) is selected according to the currently saved MCU linked list information. As shown in Figure 6, the MCU1 has the site T1 attached to it, and the MCU5 has the site T5. If the site T5 needs to view the image of the site T1, the MCU5 searches for the MCU linked list after receiving the video switching command. T1 belongs to MCU1, T5 belongs to MCU5, and the shortest between MCU1 and MCU5 is MCU1 to MCU5. Therefore, it can be determined that the video transmission path is T1->MCU1->MCU5->T5.
- the processing method of the video multi-picture in the embodiment is the same as the processing method of the video multi-picture in the foregoing embodiment, and details are not described herein again.
- each MCU can be cascaded with other MCUs, making different When the video and audio media streams between the MCUs are transmitted, the transmission path through the MCU can be selected according to the connection situation between the MCUs, the forwarding and transmission delay of the media streams are reduced, and the media streams are reduced on the MCUs.
- the number of codecs and processing times greatly reduces the quality loss of video and audio.
- the software implementation can be upgraded on the existing MCU device, and the circuit is not required to be modified, so the overall scalability is good and easy to implement.
- the spirit and scope of the invention it is intended that the present invention cover the modifications and variations of the inventions The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.
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Description
多点控制单元级联系统及其通信方法、 装置
本申请要求 2008年 6月 20日提交的, 申请号为 200810067960. 4 , 发明 名称为 "多点控制单元级联系统及其通信方法、 装置" 的中国申请的优先 权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域, 尤其涉及一种多点控制单元级联系统及其通信方 法、 多点控制单元和业务管理中心。
背景技术
随着现代网络技术和宽带建设的不断发展, 视讯会议系统已广泛应用 于工作和生活领域。 在会议电视应用中, 多点控制单元 ( Multipoint Control Unit, MCU )之间可相互级联, 通过召开级联会议, 可将不同 MCU下的终 端会场调度在同一会议中, 即存在如图 1的级联方式的组网。 其中 MCU1下 挂有 MCU2和 MCU4 , MCU2和 MCU4下分别挂有 MCU3和 MCU5。 T31到 T3m 是 MCU3下挂载的会场, T51到 T5n是 MCU5下挂载的会场(m、 n均为大于 1 的整数) 。 而使用如图 1所示的视讯系统召开级联 MCU会议时, 因为 MCU 级联层次较多 (2级 MCU以上) , 则 MCU级联引起的媒体流延时、 多次编 解码的损耗将严重影响视音频效果。 例如图 1中的 MCU5下挂的 T51会场接 收到来自 MCU3下 T31的媒体流。 由于中间经过了多级 MCU的转发
( MCU3->MCU2->MCU1->MCU4->MCU5 ) , T51会场在收到 T31会场的 数据时, 由于传送路径较长, 其视音频将产生较大的延时, 同时经过各级 MCU的混音和多次编码处理, 也将导致视音频质量大幅下降。
现有技术中 , 有改造级联 MCU之间线路的方案。 例如通过改变 MCU 间的线路材质等线路本身的改造, 来达到减少因为传输引起的媒体流延时 和视音频质量下降的目的。 但这种对传输线路改造的方法, 投入成本高, 而且不易操作。 从提升效果来看, 对 MCU多次转发引起的延时无能为力, 因此该方案对整体延时的解决效果不明显。
发明内容
本发明实施例提供一种多点控制单元级联系统及其通信方法、 多点控制 单元和业务管理中心, 以解决减少因为传输引起的媒体流延时和视音频质量 下降的问题。
根据上述目的, 本发明实施例的技术方案是这样实现的:
本发明实施例提供了一种多点控制单元 MCU级联系统, 包括在业务管理 中心管理下的多个 MCU , 所述系统中的各 MCU之间的级联方式为网状级联; 所述 MCU用于接收业务管理中心发送的会议的信息;
所述 MCU还用于根据所述会议的信息调度所述会议, 建立要参加所述会 议的所有 MCU的链表信息, 并将要参加所述会议的其他 MCU呼叫入会;
所述 MCU还用于根据所述链表信息, 同步获得所述会议的会场信息; 所述 MCU还用于根据所述会议的会场信息选择路径发送视音频数据。 本发明实施例还提供了一种多点控制单元 MCU级联系统的通信方法, 所 述系统中的 MCU之间的级联方式为网状级联, 包括以下步骤:
接收业务管理中心发送的会议的信息;
根据所述会议的信息调度所述会议, 建立要参加所述会议的所有 MCU 的 链表信息, 并将要参加所述会议的其他 MCU呼叫入会;
根据所述链表信息 , 同步获得所述会议的会场信息;
根据所述会议的会场信息选择路径发送视音频数据。
本发明实施例还提供了一种多点控制单元 MCU,所述 MCU位于一个 MCU级 联系统中, 包括创建单元、 同步单元、 发送单元, 所述系统中的 MCU之间的 级联方式为网状级联;
所述创建单元, 用于根据业务管理中心发送的会议的信息, 调度所述会 议, 建立要参加所述会议的所有 MCU 的链表信息, 并将要参加所述会议的其 他 MCU呼叫入会;
所述同步单元, 用于根据所述链表信息, 同步获得所述会议的会场信息;
所述发送单元, 用于根据所述会议的会场信息选择路径发送视音频数据。 本发明实施例还提供了一种业务管理中心, 所述业务管理中心位于一个
MCU级联系统中,
所述系统中的 MCU之间的级联方式为网状级联;
所述业务管理中心用于向所述系统中要参加会议的所有 MCU发送会议的 信息, 所述会议的信息包括所述会议的 MCU级联情况,
所述会议的 MCU级联情况包括所述要参加会议的所有 MCU的信息和组网 模式是否为网状级联, 所述要参加会议的所有 MCU 的信息包括要参加会议的 所有 MCU。
从上述方案可以看出, 和现有技术相比, 本发明实施例由于改变了级联 系统中 MCU之间的连接组网方式, 形成网状级联结构, 较现有技术的方案更 易于操作且成本不高, 并且采用这种组网方式, 每一个 MCU 可以和其他 MCU 之间进行级联, 使得不同 MCU之间的视音频媒体流在传送时, 可以根据 MCU 之间的连接情况, 选择经过 MCU最少的传输路径, 因此能够有效地避免由于 MCU多次转发引起的传输延时以及视音频质量的下降,从整体减少媒体流的传 输时间并保证媒体流的播放质量。
附图说明
图 1是现有技术的 MCU级联系统的组网示意图;
图 2是本发明实施例的 MCU级联系统的组网示意图;
图 3是本发明实施例的 MCU的结构示意图;
图 4是本发明实施例的 MCU级联系统的通信方法的流程图;
图 5是本发明一实施例的 MCU级联系统的组网示意图;
图 6是本发明又一实施例的 MCU级联系统的组网示意图。
具体实施方式
为使本发明的目的、 技术方案和优点更加清楚, 下面结合附图对本发明 实施例作进一步的详细描述。
本发明的实施例提供了一种多点控制单元级联系统, 如图 2 所示, 包括 多个 MCU以及管理上述多个 MCU的业务管理中心(图中未画出)。 这些 MCU间 的级联方式为网状级联。 系统中的每两个 MCU之间均存在双向级联通道。 即 MCU MCU2、 MCU3、 MCU4以及 MCU5彼此之间都有连接。 其中 MCU3下挂有 T31 到 T3m等多个会场 (m为大于 1的整数), MCU5下挂有 T51的会场。
系统中的业务管理中心是管理 MCU 的功能实体, 可由用户操作对一个或 多个 MCU进行管理, 设定 MCU的属性特征, 并控制 MCU调度会议。 业务管理 中心确定会议的信息, 包括所述会议的 MCU级联情况, MCU级联情况包括所述 要参加会议的所有 MCU 的信息和组网模式是否为网状级联, 所述要参加会议 的所有 MCU的信息包括要参加会议的所有 MCU。所述要参加会议的所有 MCU的 信息还包括所述要参加会议的所有 MCU的编号; 所述会议的 MCU级联情况还 包括 MCU和与所述 MCU相连的 MCU之间的上下级关系, 以及, 所述 MCU和与 所述要参加所述会议的其他 MCU之间的连接关系。 例如, 在本实施例中, 业 务管理中心在 MCU调度会议之前, 需要确定各 MCU的组网方式, 即是否采用 网状级联, 指定要参加会议的所有 MCU, 分配每个 MCU的编号 (M号), 同时 还需指定每两个相连 MCU之间的上下级关系, 以及 MCU和与要参加会议的其 他 MCU之间的连接关系。 由业务管理中心分配每个 MCU的 M号和 MCU之间的 上下级关系, 可以保证 MCU级联协商时不会出现 M号发生冲突等情况。
可以理解, 也可以业务管理中心仅确定级联系统中 MCU 的组网模式是否 网状级联, 以及要参加会议的所有 MCU, 其他的信息由系统中要参加会议的 MCU协商确定: 如要参加会议的所有 MCU的编号、 MCU和与该 MCU相连的 MCU 之间的上下级关系、 MCU和与要参加会议的其他 MCU之间的连接关系等。 连接 关系即指 MCU和与要参加会议的其他 MCU之间是否直接相连。
在以上的关系分配完毕后, 即进入该系统下 MCU会议的具体处理。 其中, 业务管理中心用于向系统中要参加会议的各 MCU发送会议的信息, 系统中的 各 MCU之间的级联方式为网状级联; 会议的信息中包含当前级联会议的 MCU
级联情况。
MCU用于根据会议的信息调度会议, 获取当前级联会议的 MCU级联情况, 建立要参加会议的所有 MCU的链表信息, 并在 MCU上建立级联端口, 将级联 端口呼叫入会; 在将级联端口呼叫入会时, 还需根据各 MCU之间的上下级关 系进行主从 MCU的确认, 具体实现可以是相连的上级 MCU将下级 MCU呼叫入 会。 由于上述的会议的信息包括当前级联会议的 MCU级联情况, 故各 MCU的 链表信息是根据获取的当前级联会议的 MCU级联情况建立的。 其中, 当前 MCU 的链表信息包括: 系统中要参加会议的其他 MCU的编号及其下挂的会场列表, 其他 MCU与当前 MCU间的连接路径以及距离。
MCU还用于根据其链表信息, 同步多点控制单元级联系统的会场信息; 具 体为: MCU根据其链表信息选择与其相连的 MCU; 将其会场信息发送给该与其 相连的 MCU; 向该与其相连的 MCU请求该与其相连的 MCU的会场信息; 等 MCU 接收到该与其相连的 MCU的会场信息后, MCU将该会场信息和 MCU的会场信 息组合形成会议的会场信息。
MCU还用于根据同步的会场信息选择路径发送视音频数据,具体可以选择 最佳的路径。 最佳路径可以是以下一种或多种信息的综合结果: MCU根据同步 的会场信息选择的视音频数据传送的最短路径、 网络质量最优路径和网络安 全性最高的路径。 这些视音频数据可以根据上述需要从 MCU 的不同级联端口 转发。
综上所述, 本发明实施例的多点控制单元级联系统, 由于采用了网状级 联的组网方式, 每一个 MCU可以和其他 MCU之间进行级联, 使得不同 MCU之 间的视音频媒体流在传送时, 可以根据 MCU之间的连接情况, 选择经过 MCU 最少的传输路径, 减少媒体流的转发和传输延时, 同时也减少了媒体流在各 个 MCU上的编解码处理次数, 大幅减少了视音频的质量损耗。 同时, 由于本 系统可在现有的 MCU设备上升级软件实现, 不需要对线路进行改造, 故整体 的扩展性好, 便于实现。
本发明的实施例还提供了一种多点控制单元 MCU, 如图 3所示, 该 MCU位 于一个 MCU级联系统中, 包括创建单元、 同步单元、 发送单元, 系统中的 MCU 之间的级联方式为网状级联。 其中所述创建单元, 用于根据业务管理中心发 送的会议的信息, 调度所述会议, 建立要参加所述会议的所有 MCU 的链表信 息, 并将要参加所述会议的其他 MCU呼叫入会; 所述同步单元, 用于根据所 述链表信息, 同步获得所述会议的会场信息; 所述发送单元, 用于根据所述 会议的会场信息选择路径发送视音频数据。
当业务管理中心确定当前级联会议的 MCU级联情况, 包括组网模式是否 网状级联、 以及要参加会议的所有 MCU时, MCU还可以和与该 MCU相连的 MCU 之间协商确定以下一种或多种信息: 要参加会议的所有 MCU的编号、 MCU和与 该 MCU相连的 MCU之间的上下级关系以及 MCU和与要参加会议的其他 MCU之 间的连接关系。 连接关系即指 MCU和与要参加会议的其他 MCU之间是否直接 相连。
当业务管理中心确定上述的所有当前级联会议的 MCU级联情况时, 业务 管理中心管理下的要参加会议的 MCU仅需保存当前级联会议的 MCU级联情况 即可。
其中创建单元根据业务管理中心发送的会议的信息, 调度所述会议, 建 立要参加所述会议的所有 MCU 的链表信息, 并将要参加所述会议的其他 MCU 呼叫入会具体为: 根据会议的信息, 获取当前级联会议的 MCU级联情况, 建 立会议中所有 MCU的链表信息。 链表信息包括要参加所述会议的其他 MCU的 编号及所述 MCU下挂的会场列表, 其他 MCU与所述 MCU间的连接路径以及距 离。
其中同步单元根据链表信息, 同步获得会议的会场信息更具体为: 根据 MCU 的链表信息选择与其相连的 MCU; 将 MCU 的会场信息发送给与其相连的 MCU; 向该与其相连的 MCU请求其会场信息; 接收到该与其相连的 MCU的会场 信息后, MCU将该会场信息和自身的会场信息组合形成会议的会场信息。
而 MCU根据同步的会场信息选择最佳路径发送视音频数据, 其中选择最 佳路径可以是以下一种或多种信息的综合结果: MCU根据同步的会场信息选择 的视音频数据传送的最短路径、 网络质量最优路径和网络安全性最高的路径。 这些视音频数据可以根据上述需要从 MCU的不同级联端口转发。
综上所述, 采用本发明实施例的多点控制单元, 由于多点控制单元所在 的系统使用了网状级联的组网方式, 每一个 MCU可以和其他 MCU之间进行级 联, 使得不同 MCU之间的视音频媒体流在传送时, 可以根据 MCU之间的连接 情况, 选择经过 MCU最少的传输路径, 减少媒体流的转发和传输延时, 同时 也减少了媒体流在各个 MCU上的编解码处理次数, 大幅减少了视音频的质量 损耗。 同时, 由于使用本发明实施例的多点控制单元, 可在现有的 MCU设备 上升级软件实现, 不需要对线路进行改造, 故整体的扩展性好, 便于实现。
本发明的实施例还提供了一种业务管理中心, 其位于一个 MCU级联系统 中, 系统中的 MCU之间的级联方式为网状级联, 业务管理中心用于向系统中 要参加会议的所有 MCU发送会议的信息, 会议的信息包括所述会议的 MCU级 联情况。 会议的 MCU级联情况包括要参加会议的所有 MCU的信息和组网模式 是否为网状级联, 要参加会议的所有 MCU的信息包括要参加会议的所有 MCU。
当业务管理中心确定当前级联会议的 MCU级联情况, 包括组网模式是否 网状级联、 以及要参加会议的所有 MCU时,还需要 MCU和与该 MCU相连的 MCU 之间协商确定以下一种或多种信息, 作为当前级联会议的 MCU级联情况: 要 参加会议的所有 MCU的编号、 MCU和与该 MCU相连的 MCU之间的上下级关系以 及 MCU和与要参加会议的其他 MCU之间的连接关系。 连接关系即指 MCU和与 要参加会议的其他 MCU之间是否直接相连。
当业务管理中心确定上述的所有当前级联会议的 MCU级联情况时, 业务 管理中心管理下的要参加会议的 MCU仅需保存当前级联会议的 MCU级联情况 即可。
在以上的关系分配完毕后, 进入该系统下 MCU会议的具体处理。
综上所述, 采用本发明实施例的业务管理中心, 由于业务管理中心向其 所管理的要参加会议的 MCU发送当前级联会议的 MCU级联情况, 明确要参加 会议的 MCU的相关信息, 从而方便后续的会议召开以及会议数据的传递。
本发明的实施例还提供了一种 MCU级联系统的通信方法,请参考图 4 , 包 括以下步骤:
首先, 如步骤 401 所示, 业务管理中心确定会议的信息, 包括所述会议 的 MCU级联情况, MCU级联情况包括所述要参加会议的所有 MCU的信息和组网 模式是否为网状级联, 所述要参加会议的所有 MCU 的信息包括要参加会议的 所有 MCU。要参加会议的所有 MCU的信息还包括要参加会议的所有 MCU的编号; 会议的 MCU级联情况还包括 MCU和与所述 MCU相连的 MCU之间的上下级关系, 以及, 所述 MCU和与所述要参加所述会议的其他 MCU之间的连接关系。 在本 实施例中, 确定了上述信息后, 业务管理中心向系统中各 MCU发送会议的信 息, 系统中的各 MCU之间的级联方式为网状级联; 在向系统中各 MCU发送会 议的信息之前, 业务管理中心还需确定网状级联的组网模式是否是网状级联、 要参加会议的所有 MCU、 各 MCU的编号、 MCU和与该 MCU相连的 MCU之间的上 下级关系, 以及 MCU和与要参加会议的其他 MCU之间的连接关系。 其中, 会 议的信息包含当前级联会议的 MCU级联情况。
其次, 如步骤 403所示, MCU根据会议的信息调度会议, 获取当前级联会 议的 MCU级联情况, 建立要参加会议中所有 MCU的链表信息, 并在 MCU上建 立级联端口, 将级联端口呼叫入会; 在将级联端口呼叫入会的同时, 还需根 据各 MCU之间的上下级关系进行主从 MCU的确认, 具体实现可以是相连的上 级 MCU将下级 MCU呼叫入会。由于上述的会议的信息包括当前级联会议的 MCU 级联情况, 故各 MCU的链表信息是根据获取的当前级联会议的 MCU级联情况 建立的。 其中链表信息包括与系统中要参加会议的其他 MCU 的编号及其下挂 的会场列表, 其他 MCU与当前 MCU间的连接路径以及距离。 链表信息的建立 具体为, 各 MCU根据所述会议的信息, 获取当前级联会议的 MCU级联情况,
建立级联会议中各 MCU的链表信息。
关于链表信息, 可参考图 5所示的组网示意图。 图 5所示的 MCU级联系 统属于某些 MCU之间没有级联通道的 MCU组网形式之一,即系统中的所有 MCU 没有形成全连接的网络的组网形式。 MCU1仅和 MCU2、 MCU4相连; MCU2除和 MCU1的连接外, 和 MCU3、 MCU4相连; MCU3除和 MCU2连接外, 还和 MCU5连 接; MCU5除和 MCU3的连接外, 还有和 MCU4的连接。 根据图中各 MCU之间的 连接关系, 在 MCU1上可形成表 1所示的链表信息:
MCU1上的链表信息
其中, M号是除 MCU1外各 MCU的编号, m、 n、 x、 y分别是大于 1的整数。 同理, 其他 MCU上也建立了类似的级联链表信息。 通过该链表信息, 可以体 现系统中每个 MCU和其他 MCU之间的联系, 从而为获取整个级联会议的 MCU 级联情况做好了准备。
再次, 如步骤 405所示, MCU根据其链表信息, 同步多点控制单元级联系 统的会场信息; 具体包括: MCU根据其链表信息选择与其相连的 MCU; MCU将 其会场信息发送给该与其相连的 MCU; MCU向该与其相连的 MCU请求该与其 相连的 MCU的会场信息;等 MCU接收到该与其相连的 MCU的会场信息后, MCU 将该会场信息和 MCU的会场信息组合形成会议的会场信息。
最后, 如步骤 407所示, MCU根据同步的会场信息选择路径发送视音频数 据, 其中可以为选择最佳路径, 而选择过程可以是以下一种或多种信息的综 合结果: MCU根据同步的会场信息选择的视音频数据传送的最短路径、 网络质
量最优路径和网络安全性最高的路径。 这些视音频数据可以根据上述需要从
MCU的不同级联端口转发。
下面分别就音频数据和视频数据的转发进行描述。
对于音频数据的转发, 当前 MCU对音频都采用了混音的处理, 即各会场 将自己的音频数据发给 MCU, 由 MCU进行混音处理后, 再由 MCU将混音后数据 发给各会场。 但级联端口的声音可能被多次混音, 如图 2所示, MCU1上的音 频将分别发给 MCU2和 MCU3 , 而 MCU2的混音也将发给 MCU3 , 由于各 MCU均可 能转发声音最大或最小的声音, 因此在 MCU3上收到的 MCU2混音和 MCU1混音 可能包含一样的声音, 即都出现 MCU1中的声音, 从而导致出现重音。 因此, 需要控制 MCU的混音, 即 MCU发给级联会场的混音数据中, 不能包含来自其 他级联端口的音频数据,这样就可以避免声音反复混音。例如, MCU1发给 MCU2 的混音码流中, 不包含来自 MCU 3、 MCU4、 MCU5这些级联端口的音频。
对于视频数据的转发, 同样也适用于音频数据。 MCU对视频数据进行切换 时, 则根据源会场和目的会场所在 MCU 的情况, 确定切换的方法。 如果两会 场所属同一 MCU, 则无需特殊处理; 如果两会场属于不同 MCU, 则根据当前保 存的 MCU链表信息,选出视频数据传送的最佳路径(可以是最短路径)。例如, 若采用图 5所示的组网方式, 可查询表 1 中的链表信息, 查找目的 MCU的 M 号, 即可获得本 MCU和目的 MCU之间的路径, 并根据该路径来控制 MCU上视 频的切换。
如图 2所示, 如果 T51会场需要观看 T31会场的图像, 则 MCU3在收到该 视频切换命令后, 查找 MCU链表信息, 发现 T31属于 MCU3 , T51属于 MCU5 , MCU3 和 MCU5 之间最短为 MCU3 到 MCU5 , 因此可确定视频传送路径为 T31->MCU3->MCU5->T5L
如上例的原理, 对于每一个视频切换的请求, 都可以根据 MCU之间的级 联信息, 确定源会场和目的会场之间经过最短 MCU路径的线路, 并根据该线 路实现视频数据的切换和传送。
下面就视频多画面的处理进行具体说明。 若采用如图 2所示的组网方式, 在需要进行多画面处理时, 业务管理中心需要指定进行多画面合出的 MCU,假 设在图 2中, 指定在 MCU1上进行多画面合成。 MCU1在收到业务管理中心的合 成多画面的处理指令后, 通知系统中其他 MCU设置多画面。 通知的方式可以 是广播方式。 非合成多画面的 MCU在收到通知消息后, 根据各子画面的会场 分布, 如果当前 MCU上的会场属于合成的子画面, 则 MCU需要将对应会场的 视频数据发给合成多画面的 MCU (在本例中是 MCU1 )。 视频数据的转发同前文 介绍。 假定 MCU2、 MCU 3 , MCU4、 MCU5下均有会场属于合成的子画面, 则它们 分别将相应的视频数据通过最短路径发送给 MCU1。 MCU1在接收到来自各 MCU 的视频数据后, 即可合成多画面, 并可将多画面数据转发给其他 MCU。 其转发 方式同前文介绍。
本发明的实施例还提供了一种 MCU级联系统的通信方法。 如图 6所示, 不同于图 5的 MCU级联系统,本实施例中的 MCU级联系统中不存在 MCU2和 MCU4 之间直接连接的链路, 而被 MCU1和 MCU5之间直接连接的链路所取代。 那么 , 在 MCU1上将形成如下的链表信息:
MCU1上的链表信息
对于音频数据的转发, 如图 6 所示, 为了避免声音反复混音, 需要控制 MCU的混音, 即 MCU发给级联会场的混音数据中, 不能包含来自其他级联端口 的音频数据。 例如可以在 MCU1发给 MCU5的混音码流中, 不包含来自 MCU2和 MCU4这些级联端口的音频。
对于视频数据的转发, 同样也适用于音频数据。 MCU对视频数据进行切换
时, 则根据源会场和目的会场所在 MCU 的情况, 确定切换的方法。 如果两会 场所属同一 MCU, 则无需特殊处理; 如果两会场属于不同 MCU, 则根据当前保 存的 MCU链表信息, 选出视频数据传送的最佳路径(可以是最短路径)。 如图 6所示, ^^设 MCU1下挂有会场 Tl , MCU5下挂有会场 T5 , 如果会场 T5需要观 看会场 T1的图像, 则 MCU5在收到该视频切换命令后, 查找 MCU链表信息, 发现 T1属于 MCU1 , T5属于 MCU5 , MCU1和 MCU5之间最短为 MCU1到 MCU5 , 因 此可确定视频传送路径为 T1->MCU1->MCU5->T5。
本实施例中对于视频多画面的处理方式和上述实施例对于视频多画面的 处理方式相同, 此处不再赘述。
综上所述, 采用本发明实施例的多点控制单元级联系统的通信方法, 由 于系统使用了网状级联的组网方式, 每一个 MCU可以和其他 MCU之间进行级 联, 使得不同 MCU之间的视音频媒体流在传送时, 可以根据 MCU之间的连接 情况, 选择经过 MCU最少的传输路径, 减少媒体流的转发和传输延时, 同时 也减少了媒体流在各个 MCU上的编解码处理次数, 大幅减少了视音频的质量 损耗。 同时, 由于采取本 MCU级联系统的通信方法, 可在现有的 MCU设备上 升级软件实现, 不需要对线路进行改造, 故整体的扩展性好, 便于实现。 发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。 以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护 范围应所述以权利要求的保护范围为准。
Claims
1、 一种多点控制单元 MCU 级联系统, 包括在业务管理中心管理下的多个 MCU , 其特征在于, 所述系统中的各 MCU之间的级联方式为网状级联;
所述 MCU用于接收业务管理中心发送的会议的信息;
所述 MCU还用于根据所述会议的信息调度所述会议, 建立要参加所述会议 的所有 MCU的链表信息, 并将要参加所述会议的其他 MCU呼叫入会;
所述 MCU还用于根据所述链表信息, 同步获得所述会议的会场信息; 所述 MCU还用于根据所述会议的会场信息选择路径发送视音频数据。
2、 如权利要求 1所述的 MCU级联系统, 其特征在于, 所述业务管理中心用 于确定并发送所述会议的信息,所述会议的信息包括所述会议的 MCU级联情况; 其中所述会议的 MCU级联情况包括所述要参加会议的所有 MCU的信息和组 网模式是否为网状级联, 所述要参加会议的所有 MCU的信息包括要参加会议的 所有 MCU。
3、 如权利要求 2所述的 MCU级联系统, 其特征在于, 所述要参加会议的所 有 MCU的信息还包括所述要参加会议的所有 MCU的编号;
所述会议的 MCU级联情况还包括 MCU和与所述 MCU相连的 MCU之间的上下 级关系, 以及,
所述 MCU和与所述要参加所述会议的其他 MCU之间的连接关系。
4、 如权利要求 1所述的 MCU级联系统, 其特征在于, 所述选择路径依据所 述视音频数据传送的链路距离、 网络质量、 网络安全性中的一种或多种信息。
5、 一种多点控制单元 MCU级联系统的通信方法, 其特征在于, 所述系统中 的 MCU之间的级联方式为网状级联, 包括以下步骤:
接收业务管理中心发送的会议的信息;
根据所述会议的信息调度所述会议, 建立要参加所述会议的所有 MCU的链 表信息, 并将要参加所述会议的其他 MCU呼叫入会;
根据所述链表信息 , 同步获得所述会议的会场信息;
根据所述会议的会场信息选择路径发送视音频数据。
6、 如权利要求 5所述的级联系统的通信方法, 其特征在于, 所述会议的信 息包括所述会议的 MCU级联情况;
其中所述会议的 MCU级联情况包括所述要参加会议的所有 MCU的信息和组 网模式是否为网状级联, 所述要参加会议的所有 MCU的信息包括要参加会议的 所有 MCU。
7、 如权利要求 6所述的级联系统的通信方法, 其特征在于,
所述要参加会议的所有 MCU的信息还包括所述要参加会议的所有 MCU的编 号;
所述会议的 MCU级联情况还包括 MCU和与所述 MCU相连的 MCU之间的上下 级关系, 以及,
所述 MCU和与所述要参加所述会议的其他 MCU之间的连接关系。
8、 如权利要求 6所述的级联系统的通信方法, 其特征在于, 在所述接收业 务管理中心发送的会议的信息后, 还包括所述 MCU和与所述 MCU相连的 MCU之 间协商确定以下一种或多种信息:
所述要参加会议的所有 MCU的编号;
所述 MCU和与所述 MCU相连的 MCU之间的上下级关系, 以及,
所述 MCU和与所述要参加所述会议的其他 MCU之间的连接关系。
9、 如权利要求 7或 8所述的级联系统的通信方法, 其特征在于, 将要参加 所述会议的其他 MCU呼叫入会为:
根据所述 MCU和与所述 MCU相连的 MCU之间的上下级关系, 将与所述 MCU 相连的下级 MCU呼叫入会。
10、 如权利要求 6 - 9任一项所述的级联系统的通信方法, 其特征在于, 所 述根据所述会议的信息调度所述会议, 建立包括要参加所述会议的所有 MCU的 链表信息, 包括:
根据所述会议的信息, 获取所述会议的 MCU级联情况, 建立所述会议中所 有 MCU的链表信息;
所述链表信息包括所述要参加所述会议的其他 MCU的编号及所述 MCU下挂
的会场列表, 所述其他 MCU与所述 MCU间的连接路径以及距离。
11、 如权利要求 5所述的级联系统的通信方法, 其特征在于, 所述根据所 述链表信息, 同步获得所述会议的会场信息为:
根据所述链表信息选择与 MCU相连的 MCU;
将所述 MCU的会场信息发送给所述与 MCU相连的 MCU;
向所述与 MCU相连的 MCU请求其会场信息;
在接收到所述与 MCU相连的 MCU的会场信息后,将所述会场信息和所述 MCU 的会场信息组合形成所述会议的会场信息。
12、 如权利要求 5所述的 MCU级联系统的通信方法, 其特征在于, 所述选 择路径依据所述视音频数据传送的链路距离、 网络质量、 网络安全性中的一种 或多种信息。
13、 一种多点控制单元 MCU, 所述 MCU位于一个 MCU级联系统中, 其特征 在于, 包括创建单元、 同步单元、 发送单元, 所述系统中的 MCU之间的级联方 式为网状级联;
所述创建单元, 用于根据业务管理中心发送的会议的信息,调度所述会议, 建立要参加所述会议的所有 MCU的链表信息, 并将要参加所述会议的其他 MCU 呼叫入会;
所述同步单元, 用于根据所述链表信息, 同步获得所述会议的会场信息; 所述发送单元, 用于根据所述会议的会场信息选择路径发送视音频数据。
14、 如权利要求 13所述的 MCU, 其特征在于, 所述会议的信息包括所述会 议的 MCU级联情况;
其中所述会议的 MCU级联情况包括所述要参加会议的所有 MCU的信息和组 网模式是否为网状级联, 所述要参加会议的所有 MCU的信息包括要参加会议的 所有 MCU。
15、 如权利要求 14所述的 MCU, 其特征在于,
所述要参加会议的所有 MCU的信息还包括所述要参加会议的所有 MCU的编 号;
所述会议的 MCU级联情况还包括 MCU和与所述 MCU相连的 MCU之间的上下 级关系, 以及,
所述 MCU和与所述要参加所述会议的其他 MCU之间的连接关系。
16、 如权利要求 14所述的 MCU, 其特征在于, 所述 MCU还用于确定以下一 种或多种信息:
所述要参加会议的所有 MCU的编号,
MCU和与所述 MCU相连的 MCU之间的上下级关系,
以及所述 MCU和与所述要参加所述会议的其他 MCU之间的连接关系。
17、 如权利要求 13所述的 MCU, 其特征在于, 所述选择路径依据所述视音 频数据传送的链路距离、 网络质量、 网络安全性中的一种或多种信息。
18、 一种业务管理中心, 所述业务管理中心位于一个 MCU级联系统中, 其 特征在于,
所述系统中的 MCU之间的级联方式为网状级联;
所述业务管理中心用于向所述系统中要参加会议的所有 MCU发送会议的信 息, 所述会议的信息包括所述会议的 MCU级联情况,
所述会议的 MCU级联情况包括所述要参加会议的所有 MCU的信息和组网模 式是否为网状级联, 所述要参加会议的所有 MCU的信息包括要参加会议的所有 MCU。
19、 如权利要求 18所述的业务管理中心, 其特征在于, 所述要参加会议的 所有 MCU的信息包括所述要参加会议的所有 MCU的编号;
所述会议的 MCU级联情况还包括 MCU和与所述 MCU相连的 MCU之间的上下 级关系, 以及,
所述 MCU和与所述要参加所述会议的其他 MCU之间的连接关系。
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US20110085019A1 (en) | 2011-04-14 |
US8576273B2 (en) | 2013-11-05 |
CN101316351A (zh) | 2008-12-03 |
EP2306714A4 (en) | 2011-07-06 |
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