阅读说明：本技术 一种会议终端更新方法和视联网系统 (Conference terminal updating method and video networking system ) 是由 周逸芳 王艳辉 亓娜 陈鑫 于 2019-09-03 设计创作，主要内容包括：本发明实施例提供了一种会议终端更新方法和视联网系统,所述方法应用于视联网中的会议管理平台,所述会议管理平台包括：运维服务器、调度服务器、前端设备,所述方法包括：响应于终端设备的会议状态变更,运维服务器生成变更信息；运维服务器将变更信息分包发送给调度服务器；响应于变更信息,调度服务器根据终端标识、变更内容、会议标识对第一终端列表进行更新,得到第二终端列表；前端设备获取第二终端列表并展示。通过运维服务器在会议进行时根据终端设备状态信息的变更向调度服务器发送变更内容,以使得调度服务器对终端列表进行更新并存储至数据库供前端设备获取展示,提高了直播会议中终端设备监控的实时性,提高了监控效率。(the embodiment of the invention provides a conference terminal updating method and a video networking system, wherein the method is applied to a conference management platform in the video networking, and the conference management platform comprises: the operation and maintenance server, the scheduling server and the front-end equipment, wherein the method comprises the following steps: responding to the conference state change of the terminal equipment, and generating change information by the operation and maintenance server; the operation and maintenance server sends the change information sub-package to the scheduling server; in response to the change information, the scheduling server updates the first terminal list according to the terminal identifier, the change content and the conference identifier to obtain a second terminal list; and the front-end equipment acquires and displays the second terminal list. The operation and maintenance server sends the change content to the scheduling server according to the change of the state information of the terminal equipment when the conference is in progress, so that the scheduling server updates the terminal list and stores the terminal list to the database for the front-end equipment to obtain and display, the real-time performance of the terminal equipment monitoring in the live conference is improved, and the monitoring efficiency is improved.)

1. A conference terminal updating method is applied to a conference management platform in a video network, and the conference management platform comprises: the operation and maintenance server is in communication connection with the scheduling server, and the method comprises the following steps:

In response to a conference state change of the terminal device, the operation and maintenance server generates change information, wherein the change information comprises: the terminal identification, the changed content and the conference identification of the terminal equipment;

The operation and maintenance server sends the change information sub-package to the scheduling server;

in response to the change information, the scheduling server updates the first terminal list according to the terminal identifier, the change content and the conference identifier to obtain a second terminal list;

And the front-end equipment acquires and displays the second terminal list.

2. the method according to claim 1, wherein, after the step of updating, by the scheduling server in response to the change information, the first terminal list according to the terminal identifier, the change content, and the conference identifier to obtain a second terminal list, the method further comprises:

And the scheduling server stores the second terminal list to a database.

3. The method of claim 2, wherein the meeting query request comprises: and the step of acquiring and displaying the second terminal list by the front-end equipment comprises the following steps:

the front-end equipment acquires the second terminal list from the database according to the target conference identifier;

The front-end equipment obtains the number of terminals corresponding to the target conference identifier according to the terminal list;

the front-end equipment displays the number of the terminals on a conference query page;

and responding to preset operation aiming at the number of the terminals, and displaying the second terminal list in the conference inquiry page by the front-end equipment.

4. the method according to claim 1, wherein the step of updating the first terminal list by the scheduling server according to the terminal identifier, the modified content, and the conference identifier to obtain the second terminal list comprises:

the scheduling server inquires a corresponding first terminal list according to the conference identifier;

the scheduling server inquires corresponding equipment state information in the first terminal list according to the terminal identification;

And the scheduling server updates the equipment state information according to the change content to obtain a second terminal list.

5. the method of claim 1, wherein the step of generating change information by the operation and maintenance server in response to the conference state change of the terminal device is preceded by:

the operation and maintenance server establishes communication connection of a plurality of terminal devices according to the preset conference configuration corresponding to the conference identifier so as to start a target conference and change the device state information of the terminal devices which are successfully connected into a conference entering state;

The operation and maintenance server establishes a mapping relationship between the terminal identifiers of the plurality of terminal devices and the conference identifier to obtain a first terminal list, wherein the terminal list comprises: device state information of the terminal device;

and the operation and maintenance server sends the first terminal list to the scheduling server.

6. a conference management system applied to a video network, the conference management system comprising: the system comprises an operation and maintenance server, a scheduling server and front-end equipment, wherein the operation and maintenance server is in communication connection with the scheduling server;

the operation and maintenance server comprises: the generating module is used for responding to the conference state change of the terminal equipment and generating change information; the change information includes: the terminal identification, the changed content and the conference identification of the terminal equipment;

The sending module is used for sending the change information sub-package to the scheduling server;

the dispatch server includes: the updating module is used for responding to the change information, updating the first terminal list according to the terminal identification, the change content and the conference identification, and obtaining a second terminal list;

the front-end device includes: and the display module is used for acquiring and displaying the second terminal list.

7. the system of claim 6, further comprising:

The dispatch server includes: and the storage module is used for storing the second terminal list to a database.

8. the system of claim 7, wherein the meeting query request comprises: a target meeting identifier, the presentation module comprising:

the acquisition submodule is used for acquiring the second terminal list from the database according to the target conference identifier;

The processing submodule is used for obtaining the number of terminals corresponding to the target conference identifier according to the terminal list;

The first display sub-module is used for displaying the number of the terminals on a conference query page;

and the second display sub-module is used for responding to preset operation aiming at the number of the terminals and displaying the second terminal list in the conference inquiry page.

9. The system of claim 6, wherein the update module comprises:

The first query submodule is used for querying a corresponding first terminal list according to the conference identifier;

the second query submodule is used for querying corresponding equipment state information in the first terminal list according to the terminal identification;

and the updating submodule is used for updating the equipment state information according to the change content so as to obtain a second terminal list.

10. the system of claim 6, further comprising:

The operation and maintenance server comprises: the conference establishing module is used for establishing communication connection of a plurality of terminal devices according to the preset conference configuration corresponding to the conference identifier so as to start a target conference and change the device state information of the terminal devices which are successfully connected into a conference entering state;

A list generating module, configured to establish a mapping relationship between the terminal identifiers of the multiple terminal devices and the conference identifier, to obtain a first terminal list, where the terminal list includes: device state information of the terminal device;

and the list sending module is used for sending the first terminal list to the scheduling server.

Technical Field

the invention relates to the technical field of video networking, in particular to a conference terminal updating method and a video networking system.

background

The video networking is an important milestone for network development, is a higher-level form of the Internet, is a real-time network, can realize the real-time transmission of full-network high-definition videos which cannot be realized by the existing Internet, and pushes a plurality of Internet applications to high-definition video. The conference management platform is a multifunctional large-scale comprehensive platform realized based on the video networking, and can realize a multi-user online high-definition video conference.

In general, an operation and maintenance server in a conference management platform sends terminal list information of a conference to a scheduling server after the conference is created or the conference is finished, and a manager can query a conference terminal of the conference through front-end equipment of the conference management platform.

However, due to various factors, the terminal devices participating in the conference may be changed at any time during the conference, and this way prevents the manager from obtaining the real-time status of the terminal devices participating in the conference through the front-end device, thereby reducing the efficiency of the manager in monitoring the conference.

disclosure of Invention

In view of the above problems, embodiments of the present invention are proposed to provide a conference terminal update method and a video networking system that overcome the above problems or at least partially solve the above problems.

in order to solve the above problem, a first aspect of the embodiments of the present invention discloses a method for updating a conference terminal, where the method is applied to a conference management platform in a video network, and the conference management platform includes: the operation and maintenance server is in communication connection with the scheduling server, and the method comprises the following steps:

in response to a conference state change of the terminal device, the operation and maintenance server generates change information, wherein the change information comprises: the terminal identification, the changed content and the conference identification of the terminal equipment;

The operation and maintenance server sends the change information sub-package to the scheduling server;

In response to the change information, the scheduling server updates the first terminal list according to the terminal identifier, the change content and the conference identifier to obtain a second terminal list;

and the front-end equipment acquires and displays the second terminal list.

Optionally, after the step of updating, by the scheduling server, the first terminal list according to the terminal identifier, the change content, and the conference identifier to obtain a second terminal list in response to the change information, the method further includes:

And the scheduling server stores the second terminal list to a database.

Optionally, the conference query request includes: the target conference identifier, in response to the received conference query request, the front-end device obtains and displays the second terminal list, including:

The front-end equipment acquires the second terminal list from the database according to the target conference identifier;

the front-end equipment obtains the number of terminals corresponding to the target conference identifier according to the terminal list;

The front-end equipment displays the number of the terminals on a conference query page;

and responding to preset operation aiming at the number of the terminals, and displaying the second terminal list in the conference inquiry page by the front-end equipment.

Optionally, the step of updating, by the scheduling server, the first terminal list according to the terminal identifier, the change content, and the conference identifier to obtain a second terminal list includes:

the scheduling server inquires a corresponding first terminal list according to the conference identifier;

the scheduling server inquires corresponding equipment state information in the first terminal list according to the terminal identification;

and the scheduling server updates the equipment state information according to the change content to obtain a second terminal list.

Optionally, before the step of generating change information by the operation and maintenance server in response to the change of the conference state of the terminal device, the method further includes:

The operation and maintenance server establishes communication connection of a plurality of terminal devices according to the preset conference configuration corresponding to the conference identifier so as to start a target conference and change the device state information of the terminal devices which are successfully connected into a conference entering state;

the operation and maintenance server establishes a mapping relationship between the terminal identifiers of the plurality of terminal devices and the conference identifier to obtain a first terminal list, wherein the terminal list comprises: device state information of the terminal device;

And the operation and maintenance server sends the first terminal list to the scheduling server.

the second aspect of the embodiment of the present invention discloses a conference management system, which is applied to a video network, and the conference management system includes: the system comprises an operation and maintenance server, a scheduling server and front-end equipment, wherein the operation and maintenance server is in communication connection with the scheduling server;

The operation and maintenance server comprises: the generating module is used for responding to the conference state change of the terminal equipment and generating change information; the change information includes: the terminal identification, the changed content and the conference identification of the terminal equipment;

The sending module is used for sending the change information sub-package to the scheduling server;

the dispatch server includes: the updating module is used for responding to the change information, updating the first terminal list according to the terminal identification, the change content and the conference identification, and obtaining a second terminal list;

the front-end device includes: and the display module is used for acquiring and displaying the second terminal list.

optionally, the system further includes:

the dispatch server includes: the storage module is used for storing the second terminal list to a database;

Optionally, the conference query request includes: a target meeting identifier, the presentation module comprising:

The acquisition submodule is used for acquiring the second terminal list from the database according to the target conference identifier;

The processing submodule is used for obtaining the number of terminals corresponding to the target conference identifier according to the terminal list;

The first display sub-module is used for displaying the number of the terminals on a conference query page;

and the second display sub-module is used for responding to preset operation aiming at the number of the terminals and displaying the second terminal list in the conference inquiry page.

Optionally, the update module includes:

the first query submodule is used for querying a corresponding first terminal list according to the conference identifier;

the second query submodule is used for querying corresponding equipment state information in the first terminal list according to the terminal identification;

And the updating submodule is used for updating the equipment state information according to the change content so as to obtain a second terminal list.

Optionally, the system further includes:

The operation and maintenance server comprises: the conference establishing module is used for establishing communication connection of a plurality of terminal devices according to the preset conference configuration corresponding to the conference identifier so as to start a target conference and change the device state information of the terminal devices which are successfully connected into a conference entering state;

A list generating module, configured to establish a mapping relationship between the terminal identifiers of the multiple terminal devices and the conference identifier, to obtain a first terminal list, where the terminal list includes: device state information of the terminal device;

And the list sending module is used for sending the first terminal list to the scheduling server.

the embodiment of the invention has the following advantages:

The embodiment of the invention provides a conference terminal updating method and a video networking system, wherein the method is applied to a conference management platform in the video networking, and the conference management platform comprises: the operation and maintenance server is in communication connection with the scheduling server, and the method comprises the following steps: in response to a conference state change of the terminal device, the operation and maintenance server generates change information, wherein the change information comprises: the terminal identification, the changed content and the conference identification of the terminal equipment; the operation and maintenance server sends the change information sub-package to the scheduling server; in response to the change information, the scheduling server updates the first terminal list according to the terminal identifier, the change content and the conference identifier to obtain a second terminal list; and the front-end equipment acquires and displays the second terminal list. The operation and maintenance server sends the change content to the scheduling server according to the change of the state information of the terminal equipment when the conference is in progress, so that the scheduling server updates the terminal list and stores the terminal list to the database for the front-end equipment to obtain and display, the real-time performance of the terminal equipment monitoring in the live conference is improved, and the monitoring efficiency is improved.

Drawings

FIG. 1 is a schematic networking diagram of a video network of the present invention;

FIG. 2 is a schematic diagram of a hardware architecture of a node server according to the present invention;

fig. 3 is a schematic diagram of a hardware structure of an access switch of the present invention;

fig. 4 is a schematic diagram of a hardware structure of an ethernet protocol conversion gateway according to the present invention;

Fig. 5 is a schematic diagram of a data transmission process during updating of a conference terminal according to the present invention;

FIG. 6 is a flow chart of the steps of a conference terminal update method of the present invention;

FIG. 7 is a flow chart of steps of another conference endpoint update method of the present invention;

Fig. 8 is a block diagram of a video networking system of the present invention.

Detailed Description

in order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.

the video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like on a system platform on a network platform, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.

To better understand the embodiments of the present invention, the following description refers to the internet of view:

some of the technologies applied in the video networking are as follows:

Network Technology (Network Technology)

Network technology innovation in video networking has improved over traditional Ethernet (Ethernet) to face the potentially enormous video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network circuit Switching (circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the whole network switching type virtual circuit and the seamless connection of data protocols.

switching Technology (Switching Technology)

The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any protocol conversion throughout the network. The video networking is a higher-level form of the Ethernet, is a real-time exchange platform, can realize the real-time transmission of the whole-network large-scale high-definition video which cannot be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.

Server Technology (Server Technology)

The server technology on the video networking and unified video platform is different from the traditional server, the streaming media transmission of the video networking and unified video platform is established on the basis of connection orientation, the data processing capacity of the video networking and unified video platform is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of video networking and unified video platform streaming media processing is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.

Storage Technology (Storage Technology)

the super-high speed storage technology of the unified video platform adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is directly sent to the user terminal instantly, and the general waiting time of the user is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.

network Security Technology (Network Security Technology)

The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.

Service Innovation Technology (Service Innovation Technology)

the unified video platform integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video platform to obtain various multimedia video services in various forms. The unified video platform adopts a menu type configuration table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes infinite new service innovation.

networking of the video network is as follows:

The video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.

As shown in fig. 1, the video network is divided into an access network and a metropolitan network.

the devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.

The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.

similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.

The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.

the metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.

Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.

the access network part can form a unified video platform (the part in the dotted circle), and a plurality of unified video platforms can form a video network; each unified video platform may be interconnected via metropolitan area and wide area video networking.

Video networking device classification

1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: servers, switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.

1.2 wherein the devices of the access network part can be mainly classified into 3 types: node servers, access switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.).

the specific hardware structure of each access network device is as follows:

A node server:

As shown in fig. 2, the system mainly includes a network interface module 201, a switching engine module 202, a CPU module 203, and a disk array module 204;

The network interface module 201, the CPU module 203, and the disk array module 204 all enter the switching engine module 202; the switching engine module 202 performs an operation of looking up the address table 205 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a queue of the corresponding packet buffer 206 based on the packet's steering information; if the queue of the packet buffer 206 is nearly full, it is discarded; the switching engine module 202 polls all packet buffer queues for forwarding if the following conditions are met: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero. The disk array module 204 mainly implements control over the hard disk, including initialization, read-write, and other operations on the hard disk; the CPU module 203 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 205 (including a downlink protocol packet address table, an uplink protocol packet address table, and a data packet address table), and configuring the disk array module 204.

the access switch:

As shown in fig. 3, the network interface module mainly includes a network interface module (a downlink network interface module 301 and an uplink network interface module 302), a switching engine module 303 and a CPU module 304;

Wherein, the packet (uplink data) coming from the downlink network interface module 301 enters the packet detection module 305; the packet detection module 305 detects whether the Destination Address (DA), the Source Address (SA), the packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 303, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 302 enters the switching engine module 303; the incoming data packet of the CPU module 304 enters the switching engine module 303; the switching engine module 303 performs an operation of looking up the address table 306 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 303 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 307 in association with the stream-id; if the queue of the packet buffer 307 is nearly full, it is discarded; if the packet entering the switching engine module 303 is not from the downlink network interface to the uplink network interface, the data packet is stored in the queue of the corresponding packet buffer 307 according to the guiding information of the packet; if the queue of the packet buffer 307 is nearly full, it is discarded.

The switching engine module 303 polls all packet buffer queues, which in this embodiment of the present invention is divided into two cases:

If the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;

If the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.

The rate control module 308 is configured by the CPU module 304, and generates tokens for packet buffer queues from all downstream network interfaces to upstream network interfaces at programmable intervals to control the rate of upstream forwarding.

The CPU module 304 is mainly responsible for protocol processing with the node server, configuration of the address table 306, and configuration of the code rate control module 308.

Ethernet protocol conversion gateway：

As shown in fig. 4, the apparatus mainly includes a network interface module (a downlink network interface module 401 and an uplink network interface module 402), a switching engine module 403, a CPU module 404, a packet detection module 405, a rate control module 408, an address table 406, a packet buffer 407, a MAC adding module 409, and a MAC deleting module 410.

Wherein, the data packet coming from the downlink network interface module 401 enters the packet detection module 405; the packet detection module 405 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;

the downlink network interface module 401 detects the sending buffer of the port, and if there is a packet, obtains the ethernet MAC DA of the corresponding terminal according to the destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MACSA of the ethernet coordination gateway, and the ethernet length or frame type, and sends the packet.

The other modules in the ethernet protocol gateway function similarly to the access switch.

a terminal:

The system mainly comprises a network interface module, a service processing module and a CPU module; for example, the set-top box mainly comprises a network interface module, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.

1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.

2. Video networking packet definition

2.1 Access network packet definition

The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.

As shown in the following table, the data packet of the access network mainly includes the following parts:

DA

SA

Reserved

Payload

CRC

wherein:

The Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various protocol packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;

The Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);

The reserved byte consists of 2 bytes;

The payload part has different lengths according to different types of datagrams, and is 64 bytes if the datagram is various types of protocol packets, and is 32+1024 or 1056 bytes if the datagram is a unicast packet, of course, the length is not limited to the above 2 types;

The CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.

2.2 metropolitan area network packet definition

The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.

In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.

As shown in the following table, the data packet of the metro network mainly includes the following parts:

DA

SA

Reserved

Label (R)

Payload

CRC

Namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The protocol of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.

Based on the above characteristics of the video network, one of the core concepts of the embodiments of the present invention is proposed, and the video network gateway device is responsible for coordinating establishment of the communication tunnel between the terminal devices, following the protocol of the video network.

in embodiments of the present invention, an video networking system may comprise a video networking gateway device.

Referring to fig. 5, in the embodiment of the present invention, the operation and maintenance server 501 is responsible for detecting device state information of the terminal device 505, generating a first terminal list and sending change information to the scheduling server 502, the scheduling server 502 is responsible for generating a second terminal list, and storing the first terminal list and the second terminal list in the database 504, and the front-end device 503 is responsible for obtaining and displaying the second terminal list from the database 504.