WO2017185967A1

WO2017185967A1 - Mcu cascade structure and control method, system and storage medium

Info

Publication number: WO2017185967A1
Application number: PCT/CN2017/079935
Authority: WO
Inventors: 卢昊旗
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-04-26
Filing date: 2017-04-10
Publication date: 2017-11-02
Also published as: CN107317995A

Abstract

Provided in the present invention are a cascade structure for a multi-control unit (MCU), as well as a control method, a system and a storage medium, wherein the MCU cascade structure comprises: a plurality of MCUs; each MCU is provided thereon with cascade interfaces of at least two cascade modes; by means of the cascade interfaces of the at least two cascade modes, the plurality of MCUs are cascaded mutually in the at least two cascade modes. On the basis of the MCU cascade structure, when an instruction for holding a MCU cascade conference is acquired, determining whether the plurality of MCUs are successfully cascaded in a first cascade mode of the at least two cascade modes; if the determination result is no, detecting a first MCU in the plurality of MCUs which has failed in cascading in the first cascade mode, and switching the first MCU to cascade in a second cascade mode of the at least two cascade modes; when the first MCU is successfully cascaded in the second cascade mode, commencing the MCU cascade conference.

Description

MCU cascade structure and control method, system and storage medium thereof

Cross-reference to related applications

The present application is filed on the basis of the Chinese Patent Application Serial No. No. No. No. No. No. No. No. No. No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

Technical field

The invention belongs to the field of video conferences, and particularly relates to an MCU (Multi Control Unit) cascade structure, a control method thereof, a control system and a storage medium.

Background technique

Today, with the rapid development of electronic information technology, video conferencing systems have been widely used in military, government, and large enterprises. The stability and reliability of conference systems need to be guaranteed. The MCU is a core component of the conference system. To ensure reliability, we often use two or more MCUs for backup protection. However, the current MCU cascading structure and cascading mode during the operation of the video conferencing system, the MCU device itself, the MCU cascading line will be faulty or use loss for various reasons, causing damage to the stable operation of the system, the existing MCU The cascade structure and the cascade mode cannot be solved in time and effectively when the system fails, and the stability and reliability of the channel cannot be guaranteed.

Summary of the invention

In order to overcome the above problems, the present invention provides an MCU cascade structure, a control method thereof, a control system and a storage medium, so as to solve the problem that the existing MCU cascade structure and the cascade mode cannot be solved in time and effectively when the system fails. The problem of stability and reliability of the channel cannot be guaranteed.

In order to solve the above technical problem, the present invention adopts the following technical solutions:

In one aspect, the present invention provides an MCU cascade structure, including:

Multiple MCUs;

Each of the MCUs is configured with a cascade port of at least two cascading modes, and the plurality of MCUs are cascaded with each other by using at least two cascading modes.

Optionally, the number of the multiple MCUs is at least three, and the cascading structure further includes:

a relay device configured with cascade ports of at least two cascade modes;

The relay device is connected to each of the MCUs in at least two cascading modes by using the cascading ports of at least two cascading modes;

Through the relay device, a plurality of the MCUs are cascaded with each other in at least two cascade modes.

In the above solution, the at least two cascading modes include: a 4E1 cascading mode and an IP cascading mode.

On the other hand, the present invention also provides a control method for the MCU cascade structure as described above, which is applied to a video conference system, and the control method includes:

Obtain a conference open command for starting an MCU cascade conference;

Determining whether a plurality of the MCUs are successfully cascaded in a first cascading mode of the at least two cascading modes;

When the determination result is no, detecting a first MCU that fails in the first cascade mode in a plurality of the MCUs;

Switching the first MCU to perform cascading in a second cascading mode of the at least two cascading modes;

And when the first MCU is successfully cascaded in the second cascading mode, the MCU cascading conference is held according to the conference open command.

In the above solution, after the MCU cascading conference is held according to the conference open command, the control method further includes:

Detecting, during the convening of the MCU cascading conference, whether there is a second MCU that fails the cascading failure in the first cascading mode of the at least two cascading modes;

When the detection result is YES, switching the first cascading mode of the second MCU to cascading the second cascading mode of the at least two cascading modes.

Detecting whether a third MCU that opens the MCU cascading conference among the plurality of MCUs fails during the convening of the MCU cascading conference;

When detecting that the third MCU is faulty, determining whether there is a fourth MCU that is successfully cascaded with the third MCU in the first cascading mode of the at least two cascading modes;

When the judgment result is yes, the MCU cascade conference is backed up to the fourth MCU.

Optionally, when detecting that the third MCU is faulty, determining whether there is a fourth MCU that is successfully cascaded with the third MCU in a first cascading mode of the at least two cascading modes. Thereafter, the control method further includes:

When the determination result is no, determining whether there is a fourth MCU that is successfully cascaded with the third MCU in the second cascading mode of the at least two cascading modes;

In still another aspect, the present invention also provides a control system for an MCU cascade structure as described above, the control system comprising:

Obtaining a module, configured to obtain a conference open command for starting an MCU cascade conference;

a first determining module, configured to determine whether a plurality of the MCUs are successfully cascaded in a first cascading mode of the at least two cascading modes;

a first detecting module, configured to detect, when the determination result is no, the first MCU that fails in the first cascade mode in the plurality of MCUs;

a first mode switching module configured to switch the first MCU to the at least two cascading modes The second cascade mode in the formula is cascaded;

The conference convening module is configured to convene the MCU cascading conference according to the conference open command when the first MCU succeeds in cascading in the second cascading mode.

In the above solution, the control system further includes:

a second detecting module, configured to detect, during the convening of the MCU cascading conference, whether there is a second MCU that fails in cascade in the first cascading mode of the at least two cascading modes;

And a second mode switching module configured to: when the detection result is yes, switch the first cascading mode of the second MCU to perform cascading for the second cascading mode of the at least two cascading modes.

In the above solution, the control system further includes:

a third detecting module, configured to detect whether a third MCU that opens the MCU cascading conference in the plurality of MCUs fails during the convening of the MCU cascading conference;

a second determining module, configured to: when it is detected that the third MCU is faulty, determine whether there is a fourth cascading success with the third MCU in the first cascading mode of the at least two cascading modes MCU;

The first conference backup module is configured to back up the MCU cascade conference to the fourth MCU when the judgment result is yes.

In the above solution, the control system further includes:

a third determining module, configured to: when the determination result is no, determine whether there is a fourth MCU that is successfully cascaded with the third MCU in the second cascading mode of the at least two cascading modes;

The second conference backup module is configured to back up the MCU cascade conference to the fourth MCU when the judgment result is yes.

The embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores computer executable instructions for executing the foregoing control method of the MCU cascade structure.

The beneficial effects of the invention are:

In the foregoing solution, at least two cascaded ports of the cascading mode are configured on multiple MCUs, and at least two cascading modes are provided to implement mutual cascading between multiple MCUs, and cascading through at least two modes. When one of the problems occurs, it can switch to another mode to provide different line switching and backup selection for the conference opening and holding process of the video conference system, ensuring the reliability and stability of the cascade between the MCUs, and improving the video. The fault tolerance of the conference system improves the stability and overall fluency of the video conferencing system.

DRAWINGS

Figure 1 is a flow chart 1 showing a second embodiment of the present invention;

Figure 2 is a flow chart 2 showing the second embodiment of the present invention;

Figure 3 is a flow chart 3 showing the second embodiment of the present invention;

Figure 4 is a block diagram showing a block diagram of a third embodiment of the present invention;

Figure 5 is a block diagram 2 of the module in the third embodiment of the present invention;

6 is a first schematic diagram of an MCU cascade structure in the first embodiment of the present invention;

FIG. 7 shows a second schematic diagram of the MCU cascade structure in the first embodiment of the present invention.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

First embodiment

As shown in FIG. 6 and FIG. 7 , the present invention discloses an MCU cascading structure, which includes: a plurality of MCUs; each of the MCUs is configured with at least two cascaded cascading ports, through at least two The cascade port of the cascading mode, at least two cascading modes are used between the plurality of MCUs Cascade.

When the number of the multiple MCUs is two, the two MCUs are directly cascaded with each other through the cascade ports of at least two cascaded modes configured. The two directly cascaded MCUs are configured with cascaded lines corresponding to the at least two cascaded modes, and each of the cascaded lines corresponds to a different cascaded mode. The at least two cascading modes include: a 4E1 cascading mode and an IP cascading mode. The number of the at least two cascading modes is specifically preferably two, and the two cascading modes preferably correspond to the 4E1 cascading mode and the IP cascading mode, respectively.

Specifically, when the number of the multiple MCUs is at least three, the cascading structure further includes: a relay device configured with a cascade port of at least two cascading modes; the level of the at least two cascading modes And the relay device is connected to each of the MCUs by using at least two cascading modes; and the plurality of MCUs are cascaded with each other by using at least two cascading modes.

The at least three MCUs are cascaded with each other by a relay device configured with at least two cascaded cascade ports, and each of the MCUs and the relay device is configured with the at least two cascade modes. Corresponding cascaded lines. The at least three MCUs are cascaded with each other through a relay device disposed between the at least three MCUs.

The MCU cascading structure is configured with at least two cascaded expansion ports on multiple MCUs, and at least two cascading modes are provided to implement mutual cascading between multiple MCUs for the conference of the video conference system. The opening and holding process provides different line switching and backup options, improves the fault tolerance of the video conferencing system, and improves the stability and overall fluency of the video conferencing system.

Second embodiment

The invention also discloses a control method of the MCU cascade structure, which is applied to a video conference system. The MCU cascade structure is specifically an MCU cascade structure as mentioned in the first embodiment.

The number of the cascading modes involved in the method is at least two. Here, the cascading mode is specifically two. The two cascading modes are preferably a 4E1 cascading mode and an IP cascading mode. The specific instructions in the following sections.

Specifically, as shown in FIG. 1, the control method includes:

Step 101: Acquire a conference open command for starting an MCU cascade conference.

Step 102: Determine whether the cascading success of the first cascading mode in the at least two cascading modes is successful between the multiple MCUs.

The first cascading mode in this step may be a cascading mode in which the highest priority is set in the at least two cascading modes. Specifically, when the cascading mode is two, and the two cascading modes are the 4E1 cascading mode and the IP cascading mode, respectively, the 4E1 cascading mode is set to the cascading mode with high priority, when the MCUs are respectively separated. After the cascading lines corresponding to the 4E1 cascading mode and the IP cascading mode are connected, if both lines are good, the MCUs are cascaded in the 4E1 private network mode to ensure the security and reliability of the conference system.

Step 103: When the result of the determination is no, detecting, by the plurality of MCUs, the first MCU that fails in the first cascade mode.

In this step, when it is determined that the plurality of MCUs are not cascaded successfully in the first cascading mode of the at least two cascading modes, the cascading fails due to a problem of the cascading line, and the cascading fails. The problem line is not the first MCU that is successfully cascaded in the first cascade mode, and the MCU is detected to solve the problem.

Correspondingly, when the determination result is yes, the MCU cascade conference will be held according to the conference opening instruction.

Step 104: Switch the first MCU to perform cascading in a second cascading mode of the at least two cascading modes.

When detecting the first MCU that fails to cascade in the first cascading mode, switching the first cascading mode to the second cascading mode of the first MCU to implement the cascading line corresponding to the second cascading mode The overall ultimate success cascade. After the cascading mode switching is completed, it is determined whether the first MCU is successfully cascaded in the second cascading mode after the switching.

Step 105: When the first MCU is successfully cascaded in the second cascading mode, according to the The conference opens an instruction to hold the MCU cascade conference.

Specifically, in the foregoing process, when the cascading mode is two, and the two cascading modes are the 4E1 cascading mode and the IP cascading mode, respectively, the dual-mode cascade port (4E1) is configured on the MCU that needs to be cascaded. Mode and IP mode), and cascading them, and networking according to the number of MCUs, as shown in Figure 6 and Figure 7. Opening the MCU cascading conference to determine whether the 4E1 cascading mode is successful. If 4E1 If the cascading mode is successful, the cascading conference in the 4E1 cascading mode is successfully convened. If the cascading conference fails, the cascading line of the MCU is switched to the IP cascading mode line to determine whether the MCU is The cascading mode of the IP cascading mode succeeds. If the cascading is successful, the cascading conference in the IP cascading mode is successfully convened. If it is unsuccessful, the cascading fails. When both lines are good, the MCU is cascaded in the 4E1 cascading mode to ensure security and reliability. When a fault occurs in a certain line, the MCU performs the cascade connection mode, and the line corresponding to the switched cascade mode is successfully cascaded to ensure the cascading is normal. When the first MCU is unsuccessful in the second cascade mode cascade, no processing is performed.

In the method provided in this embodiment, in a video conference system in which two or more MCUs are cascaded, two or more MCUs are cascaded in at least two cascade modes, and the levels are through at least two modes. When one of the problems occurs, it can switch to another mode to ensure the reliability and stability of the cascade between MCUs, improve the fault tolerance of the video conferencing system, and improve the stability and overall fluency of the video conferencing system. .

Next, in the process of the MCU cascading conference, when the cascading line has a problem, the control process of the MCU cascading structure is described.

Specifically, as shown in FIG. 2, after the MCU cascading conference is held according to the conference opening instruction, the control method further includes:

Step 201: Detect whether there is a second MCU that fails the cascade connection in the first cascading mode of the at least two cascading modes during the convening of the MCU cascading conference.

In this step, the cascading failure occurs due to a problem with the cascading line during the convening of the MCU cascading conference. At this time, it is necessary to detect that the cascading mode is not successful in the first cascading mode due to the problem line. The second MCU to further solve the problem.

Step 202: When the detection result is yes, switching the first cascading mode of the second MCU to perform cascading for the second cascading mode of the at least two cascading modes.

When detecting the second MCU that fails to cascade in the first cascading mode, switching the first cascading mode to the second cascading mode of the second MCU to implement the cascading line corresponding to the second cascading mode The overall success of the cascade is ensured to ensure the stability of the conference system.

Specifically, when the cascading mode is two, and the two cascading modes are respectively the 4E1 cascading mode and the IP cascading mode, after the cascading conference is successfully held, if the cascading line corresponding to the 4E1 cascading mode has a problem Then, switch to the IP cascading mode, and cascade the cascading lines corresponding to the IP cascading mode; if there is a problem with the cascading line corresponding to the IP cascading mode, switch to the 4E1 cascading mode, and Cascade by 4E1 The cascaded lines corresponding to the mode are cascaded.

Next, specifically for the MCU cascading conference, when the MCU has a problem, the control process of the MCU cascading structure is described.

Specifically, as shown in FIG. 3, after the MCU cascading conference is held according to the conference opening instruction, the control method further includes:

Step 301: Detect whether a third MCU that opens the MCU cascading conference in the plurality of MCUs fails during the convening of the MCU cascading conference.

Specifically, in the process before the step is performed, after receiving the conference open command, the MCU cascade conference needs to be started on one of the plurality of MCUs according to the conference open command. After the MCU cascading conference is successfully convened, it is necessary to detect in real time whether the third MCU that opens the MCU cascading conference has a fault, so as to ensure stable operation of the conference system and timely fault tolerance processing.

Step 302: When it is detected that the third MCU is faulty, determine whether there is a third The MCU cascades the succeeding fourth MCU in a first cascade mode of at least two cascaded modes.

Step 303: When the judgment result is yes, the MCU cascade conference is backed up to the fourth MCU.

If the third MCU that opens the MCU cascading conference fails, check whether the cascading line between the MCU and the MCU cascading in the 4E1 mode is good, and if there is a cascading line, the cascading is performed in the 4E1 cascading mode. The fourth MCU indicates that there is a fourth MCU that is successfully cascaded with the third MCU in the first cascading mode of the at least two cascading modes, and then the MCU cascading conference is backed up to the fourth MCU.

Specifically, after detecting that the third MCU is faulty, determining whether there is a fourth MCU that is successfully cascaded with the third MCU in the first cascading mode of the at least two cascading modes, the control method further includes :

Step 304: When the determination result is no, it is determined whether there is a fourth MCU that is successfully cascaded with the third MCU in the second cascading mode of the at least two cascading modes. When the judgment result is yes, the MCU cascade conference is backed up to the fourth MCU.

If there is no fourth MCU in the 4E1 cascading mode in which the cascading line is good, it indicates that there is no fourth MCU that is successfully cascaded with the third MCU in the first cascading mode of the at least two cascading modes, and this At the same time, looking for a fourth MCU that is cascaded in an IP cascade mode with a good cascading line, indicating that there is a fourth MCU that is successfully cascaded with the third MCU in the second cascading mode of the at least two cascading modes. , the MCU cascade conference is backed up to this fourth MCU.

Preferably, the at least two cascading modes comprise: a 4E1 cascading mode and an IP cascading mode.

In the above process, when an MCU fails, it can find the MCU with good line to perform backup and recovery of the conference according to the existing networking conditions, and at least two cascading modes, so as to ensure that the conference can be restored and restored. To ensure the reliability of the business application of the video conferencing system.

Third embodiment

The present invention also provides a control system for an MCU cascade structure, wherein the MCU cascade structure is specifically an MCU cascade structure as mentioned in the first embodiment.

As shown in FIG. 4 and FIG. 5, the control system includes: an obtaining module 401, a first determining module 402, a first detecting module 403, a first mode switching module 404, and a conference holding module 405.

The obtaining module 401 is configured to obtain a conference open command for starting an MCU cascade conference.

The first determining module 402 is configured to determine whether a plurality of the MCUs are successfully cascaded in the first cascading mode of the at least two cascading modes. The first cascading mode may be a cascading mode in which the highest priority is set in the at least two cascading modes.

The first detecting module 403 is configured to detect, when the determination result is no, the first MCU that fails in the first cascade mode in the plurality of MCUs.

The first mode switching module 404 is configured to switch the first MCU to perform cascading in a second cascading mode of the at least two cascading modes.

The conference holding module 405 is configured to: when the first MCU is successfully cascaded in the second cascading mode, hold the MCU cascading conference according to the conference open command.

Specifically, the control system further includes: a second detection module 406 and a second mode switching module 407.

The second detecting module 406 is configured to detect whether there is a second MCU that fails in the first cascading mode of the at least two cascading modes during the convening of the MCU cascading conference.

The second mode switching module 407 is configured to switch the first cascading mode of the second MCU to the second cascading mode of the at least two cascading modes to perform cascading when the detection result is YES.

Specifically, the control system further includes: a third detecting module 408, a second determining module 409, and a first meeting backup module 410.

The third detecting module 408 is configured to detect whether a third MCU that opens the MCU cascading conference among the plurality of MCUs fails during the convening of the MCU cascading conference.

The second determining module 409 is configured to: when it is detected that the third MCU is faulty, determine whether there is a cascading success with the third MCU in the first cascading mode of the at least two cascading modes Four MCUs.

The first conference backup module 410 is configured to back up the MCU cascade conference to the fourth MCU when the determination result is yes.

Specifically, the control system further includes: a third judging module 411 and a second conference backup module 412.

The third determining module 411 is configured to: when the determination result is no, determine whether there is a fourth MCU that is successfully cascaded with the third MCU in the second cascading mode of the at least two cascading modes.

The second conference backup module 412 is configured to back up the MCU cascade conference to the fourth MCU when the determination result is yes.

Preferably, the at least two cascading modes comprise: a 4E1 cascading mode and an IP cascading mode. The control system of the MCU cascade structure is preferably a video conference system.

The above control system, in a plurality of MCU cascaded video conference systems, uses at least two modes to perform multiple MCU cascading to ensure line backup and MCU backup switching, and provides a video conference system to be opened and operated. Different line switching and backup selection, through the cascade of at least two modes, ensure the reliability and stability of cascading between MCUs. Ensure the reliability of the video application system's service application, improve the fault tolerance of the video conferencing system, and improve the stability and overall fluency of the video conferencing system.

The acquiring module, the first determining module, the first detecting module, the first mode switching module, the conference holding module, the second detecting module, and the second mode switching in the control system of the MCU cascade structure proposed in the embodiment of the present invention The module, the third detecting module, the second determining module, the first meeting backup module, the third determining module, and the second meeting backup module can all be implemented by a processor, and can also be implemented by a specific logic circuit; , the processor can be centrally Processor (CPU), microprocessor (MPU), digital signal processor (DSP) or field programmable gate array (FPGA).

In the embodiment of the present invention, if the control method of the MCU cascade structure is implemented in the form of a software function module, and is sold or used as an independent product, it may also be stored in a computer readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a computer program, and the computer program is used to execute the control method of the MCU cascade structure of the embodiment of the present invention.

While a preferred embodiment of the present invention has been described, it will be apparent that those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

Finally, it should also be noted that in the embodiments of the present invention, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, without necessarily requiring or Imply that there is any such actual relationship or order between these entities or operations. Furthermore, the terms "comprises" or "comprising" or "comprising" or any other variations are intended to encompass a non-exclusive inclusion, such that a process, method, article, or terminal device that includes a plurality of elements includes not only those elements but also Other elements that are included, or include elements inherent to such a process, method, article, or terminal device. In the absence of more restrictions In other words, an element defined by the phrase "comprising a ..." does not exclude the presence of the same element in the process, method, article or terminal device including the element.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. Within the scope of protection of the invention.

Industrial applicability

In the embodiment of the present invention, the MCU cascading structure includes a plurality of MCUs; each of the MCUs is configured with at least two cascading ports of the cascading mode, and the cascading ports of the at least two cascading modes are multiple. The MCUs are cascaded with each other using at least two cascade modes. In this way, the backup of the line and the backup of the MCU can be guaranteed, and different line switching and backup selections are provided for the video conference system to be opened and operated, and the cascading of at least two modes ensures the reliability of the cascade between the MCUs. stability. Ensure the reliability of the video application system's service application, improve the fault tolerance of the video conferencing system, and improve the stability and overall fluency of the video conferencing system.

Claims

A multi-point control unit MCU cascade structure, comprising:

Multiple MCUs;

Each of the MCUs is configured with a cascade port of at least two cascading modes, and the plurality of MCUs are cascaded with each other by using at least two cascading modes.
The cascading structure according to claim 1, wherein the number of the plurality of MCUs is at least three, and the cascading structure further comprises:

a relay device configured with cascade ports of at least two cascade modes;

The relay device is connected to each of the MCUs in at least two cascading modes by using the cascading ports of at least two cascading modes;

Through the relay device, a plurality of the MCUs are cascaded with each other in at least two cascade modes.
The cascading structure according to claim 1, wherein the at least two cascading modes comprise: a 4E1 cascading mode and an IP cascading mode.
A control method for a multi-point control unit MCU cascading structure is applied to a video conference system, and the control method includes:

Obtain a conference open command for starting an MCU cascade conference;

Determining whether a plurality of the MCUs are successfully cascaded in a first cascading mode of the at least two cascading modes;

When the determination result is no, detecting a first MCU that fails in the first cascade mode in a plurality of the MCUs;

Switching the first MCU to perform cascading in a second cascading mode of the at least two cascading modes;

When the first MCU succeeds in cascading in the second cascading mode, according to the conference Initiate the instruction to hold the MCU cascading conference.
The control method according to claim 4, wherein after the convening the MCU cascading conference according to the conference opening instruction, the control method further includes:

Detecting, during the convening of the MCU cascading conference, whether there is a second MCU that fails the cascading failure in the first cascading mode of the at least two cascading modes;

When the detection result is YES, switching the first cascading mode of the second MCU to cascading the second cascading mode of the at least two cascading modes.
The control method according to claim 4, wherein after the convening the MCU cascading conference according to the conference opening instruction, the control method further includes:

Detecting whether a third MCU that opens the MCU cascading conference among the plurality of MCUs fails during the convening of the MCU cascading conference;

When detecting that the third MCU is faulty, determining whether there is a fourth MCU that is successfully cascaded with the third MCU in the first cascading mode of the at least two cascading modes;

When the judgment result is yes, the MCU cascade conference is backed up to the fourth MCU.
The control method according to claim 6, wherein when it is detected that the third MCU is faulty, it is determined whether there is a first cascade with the third MCU in the at least two cascade modes After the mode cascades the succeeding fourth MCU, the control method further includes:

When the determination result is no, determining whether there is a fourth MCU that is successfully cascaded with the third MCU in the second cascading mode of the at least two cascading modes;

When the judgment result is yes, the MCU cascade conference is backed up to the fourth MCU.
A control system for a multi-point control unit MCU cascade structure, the control system comprising:

Obtaining a module, configured to obtain a conference open command for starting an MCU cascade conference;

a first determining module, configured to determine whether the at least two levels are between the plurality of MCUs The cascade of the first cascade mode in the joint mode is successful;

a first detecting module, configured to detect, when the determination result is no, the first MCU that fails in the first cascade mode in the plurality of MCUs;

a first mode switching module, configured to switch the first MCU to perform cascading in a second cascading mode of the at least two cascading modes;

The conference convening module is configured to convene the MCU cascading conference according to the conference open command when the first MCU succeeds in cascading in the second cascading mode.
The control system of claim 8 wherein said control system further comprises:

a second detecting module, configured to detect, during the convening of the MCU cascading conference, whether there is a second MCU that fails in cascade in the first cascading mode of the at least two cascading modes;

And a second mode switching module configured to: when the detection result is yes, switch the first cascading mode of the second MCU to perform cascading for the second cascading mode of the at least two cascading modes.
The control system of claim 8 wherein said control system further comprises:

a third detecting module, configured to detect whether a third MCU that opens the MCU cascading conference in the plurality of MCUs fails during the convening of the MCU cascading conference;

a second determining module, configured to: when it is detected that the third MCU is faulty, determine whether there is a fourth cascading success with the third MCU in the first cascading mode of the at least two cascading modes MCU;

The first conference backup module is configured to back up the MCU cascade conference to the fourth MCU when the judgment result is yes.
The control system of claim 10 wherein said control system further comprises:

a third determining module, configured to: when the determination result is no, determine whether there is a fourth MCU that is successfully cascaded with the third MCU in the second cascading mode of the at least two cascading modes;

The second conference backup module is configured to back up the MCU cascade conference to the fourth MCU when the judgment result is yes.
A computer storage medium storing computer executable instructions for performing the control method of the multipoint control unit MCU cascade structure according to any one of claims 4 to 7.