CN109714706B

CN109714706B - Video networking communication method and device

Info

Publication number: CN109714706B
Application number: CN201910002633.9A
Authority: CN
Inventors: 韩杰; 殷新; 王艳辉; 杨春晖
Original assignee: Visionvera Information Technology Co Ltd
Current assignee: Hainan Shilian Communication Technology Co ltd
Priority date: 2019-01-02
Filing date: 2019-01-02
Publication date: 2020-10-27
Anticipated expiration: 2039-01-02
Also published as: CN109714706A

Abstract

The embodiment of the invention provides a video networking communication method and device. The method comprises the following steps: the first video network terminal searches a target second-level node; the target second-level node establishes a link with the first video network terminal; the first video network terminal sends second identification information of the second video network terminal to the target second-level node based on the link; the target second-level node forwards the second identification information to the accessed first-level node; the accessed first-level node determines a forwarding second-level node identifier and a forwarding sequence between the first video network terminal and the second video network terminal based on the network access information; and the first video network terminal communicates with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding sequence. The communication delay is avoided to be large, and the communication pressure of the first-level node is relieved.

Description

Video networking communication method and device

Technical Field

The invention relates to the technical field of video networking, in particular to a video networking communication method and device.

Background

The video network can realize real-time and rapid transmission of full-network high-definition audio and video, and the like, so the application is wide.

At present, each node of the space-based network stores a relatively fixed static information table, each first video network terminal serving as a child node corresponding to the node is recorded in the static information table, each node in the space-based network only allows the first video network terminal in the static information table to access, and then communication between different first video network terminals is realized through forwarding of each node in the space-based network.

The inventor finds in the research process that the prior art proposal has the following disadvantages: in the prior art, the satellite as each node in the space-based network moves, so that the distance between each node in the space-based network and the first video network node of the child node in the space-based network can be changed dynamically, each first video network terminal still communicates according to the space-based network node corresponding to the relatively fixed static information table, the distance between the first video network terminal and the corresponding space-based network node is far, the time delay is increased, and the real-time communication of each first video network terminal is not facilitated.

Disclosure of Invention

In view of the above, embodiments of the present invention are proposed to provide a method and apparatus for video networking communication that overcome or at least partially solve the above problems.

In order to solve the above problem, an embodiment of the present invention discloses a method for communication in a video network, where the method is applied to the video network, and the video network includes: the system comprises a space-based network, a first video network terminal and a second video network terminal; the space-based network includes: a space-based backbone network and a space-based access network; the space-based backbone network comprises: a first level node; the space-based access network comprises: a second level node; the first-level node stores the network access information of all the second-level nodes and all the access video network terminals; the method comprises the following steps:

when the distance between the first video network terminal and the accessed second-level node is larger than a first preset distance, the first video network terminal searches a target second-level node; the target second-level node is a second-level node which is located in a geographical area of a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold;

the first video network terminal sends a first network access request to the target second-level node;

the target second-level node establishes a link with the first video network terminal based on the first network access request, and writes first identification information of the first video network terminal and position information of the first video network terminal into a dynamic information table of the target second-level node;

the first video network terminal sends second identification information of the second video network terminal to the target second-level node based on the link;

when the second identification information does not exist in the dynamic information table, the target second-level node forwards the second identification information to the accessed first-level node;

the accessed first-level node determines a forwarding second-level node identifier and a forwarding sequence between the first video network terminal and the second video network terminal based on the network access information;

the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node;

and the first video network terminal communicates with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding sequence.

Optionally, the method further includes: when the distance between the second-level node and the accessed first-level node is larger than a second preset distance, the second-level node searches a target first-level node; the target first-level node is a first-level node which is located in a geographic area of a second preset range of the second-level node and has a bandwidth exceeding a second preset bandwidth threshold;

the second level node sends a second network access request to the target first level node;

and the target first-level node establishes a link with the second-level node based on the second network access request.

Optionally, after the first identification information of the first video network terminal is written in the dynamic information table of the target second-level node, the method further includes:

and the target second-level node sends the updated dynamic information table to the first-level node accessed by the target second-level node.

Optionally, when the second identification information exists in the dynamic information table of the target second-level node, the method further includes:

and the first video network terminal communicates with the second video network terminal based on the link.

Optionally, the network access information includes: the dynamic information tables of all the second-level nodes, the position information of all the second-level nodes and the position information of all the access video network terminals;

the accessed first-level node determines the forwarding second-level node identification and the forwarding sequence between the first video network terminal and the second video network terminal based on the network access information, and the method comprises the following steps:

and the accessed first-level node determines the forwarding second-level node identifier and the forwarding sequence with the shortest distance between the first video network terminal and the second video network terminal based on the dynamic information tables of all the second-level nodes, the position information of all the second-level nodes and the position information of all the accessed video network terminals.

Another aspect of the present invention also provides a device for communication in a video network, the device being applied to the video network, the video network including: the system comprises a space-based network, a first video network terminal and a second video network terminal; the space-based network includes: a space-based backbone network and a space-based access network; the space-based backbone network comprises: a first level node; the space-based access network comprises: a second level node; the first-level node stores the network access information of all the second-level nodes and all the access video network terminals; the device comprises:

the target second-level node searching module is used for searching a target second-level node by the first video network terminal when the distance between the first video network terminal and the accessed second-level node is greater than a first preset distance; the target second-level node is a second-level node which is located in a geographical area of a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold;

the first network access request sending module is used for sending a first network access request to the target second-level node by the first video network terminal;

a first link establishing module, configured to establish a link with the first video network terminal by the target second-level node based on the first network access request, and write first identification information of the first video network terminal and location information of the first video network terminal in a dynamic information table of the target second-level node;

a second identification information sending module, configured to send, by the first video networking terminal, second identification information of the second video networking terminal to the target second-level node based on the link;

a second identification information forwarding module, configured to forward, to an accessed first-level node, the second identification information by the target second-level node when the second identification information does not exist in the dynamic information table;

a forwarding order determination module, configured to determine, by the accessed first-level node, a forwarding second-level node identifier and a forwarding order between the first video network terminal and the second video network terminal based on the network access information;

a forwarding sequence sending module, configured to send, by the accessed first-level node, the forwarding second-level node identifier and the forwarding sequence to the first video network terminal through the target second-level node;

and the first communication module is used for the first video network terminal to communicate with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding sequence.

Optionally, the apparatus further comprises:

the target first-stage node searching module is used for searching a target first-stage node by the second-stage node when the distance between the second-stage node and the accessed first-stage node is greater than a second preset distance; the target first-level node is a first-level node which is located in a geographic area of a second preset range of the second-level node and has a bandwidth exceeding a second preset bandwidth threshold;

a second network access request sending module, configured to send, by the second-level node, a second network access request to the target first-level node;

and the second link establishing module is used for establishing a link with the second-level node by the target first-level node based on the second network access request.

Optionally, the apparatus further comprises:

and the dynamic information table sending module is used for sending the updated dynamic information table to the first-level node accessed by the target second-level node.

and the second communication module is used for the first video network terminal to communicate with the second video network terminal based on the link.

the forwarding order determination module includes:

and the forwarding sequence determining unit is used for determining the forwarding second-level node identifier and the forwarding sequence with the shortest distance between the first video network terminal and the second video network terminal by the accessed first-level node based on the dynamic information tables of all the second-level nodes, the position information of all the second-level nodes and the position information of all the accessed video network terminals.

The embodiment of the invention has the following advantages: the method is applied to an eye-networking, which comprises the following steps: the system comprises a space-based network, a first video network terminal and a second video network terminal; the space-based network includes: a space-based backbone network and a space-based access network; the space-based backbone network comprises: a first level node; the space-based access network comprises: a second level node; the first-level node stores the network access information of all the second-level nodes and all the access video network terminals; when the distance between the first video network terminal and the accessed second-level node is larger than a first preset distance, the first video network terminal searches a target second-level node; the target second-level node is a second-level node which is located in a geographical area of a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold; the first video network terminal sends a first network access request to the target second-level node; the target second-level node establishes a link with the first video network terminal based on the first network access request, and writes first identification information of the first video network terminal and position information of the first video network terminal into a dynamic information table of the target second-level node; the first video network terminal sends second identification information of the second video network terminal to the target second-level node based on the link; when the second identification information does not exist in the dynamic information table, the target second-level node forwards the second identification information to the accessed first-level node; the accessed first-level node determines a forwarding second-level node identifier and a forwarding sequence between the first video network terminal and the second video network terminal based on the network access information; the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node; and the first video network terminal communicates with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding sequence. When the distance between the first video network terminal and the accessed second-level node is greater than a first preset distance, the first video network terminal searches for a target second-level node which is located in a geographical area within a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold value, and accesses the target second-level node; meanwhile, when the second identification information does not exist in the dynamic information table of the target second-level node, namely the target second-level node is not a common father node of the first video network terminal and the second video network terminal, the target second-level node sends the second identification information of the second video network terminal to the accessed first-level node, the first-level node stores the network access information of all the second-level nodes and all the accessed video network terminals, the accessed first-level node determines the forwarding second-level node identification and the forwarding sequence between the first video network terminal and the second video network terminal based on the network access information, the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node, and the first video network terminal forwards the second-level node corresponding to the second-level node identification based on the forwarding sequence, the communication with the second video network terminal is not carried out through the first-level node, so that the communication pressure of the first-level node can be relieved.

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 video network according to an embodiment of the present invention;

FIG. 6 is a schematic view of a corresponding view networking entity structure of FIG. 5

FIG. 7 is a flow chart of the steps of a method of video networking of the present invention;

FIG. 8 is a flow chart of steps of yet another method of video networking of the present invention;

FIG. 9 is a block diagram of an apparatus for video networking communication according to an embodiment of the present invention;

fig. 10 is a block diagram of another apparatus for video networking communication according to an embodiment 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 seamless connection of the whole network switching type virtual circuit and the data format.

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 format conversion across the entire 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 data packet coming from the CPU module 204 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 208 is configured by the CPU module 204, 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, acquires the ethernet MAC DA of the corresponding terminal according to the video networking 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 format 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 characteristics of the video network, one of the core concepts of the embodiments of the present invention is provided, when the distance between the first video network terminal and the accessed second-level node is greater than the first preset distance, the first video network terminal searches for a target second-level node, which is located in the geographic area of the first video network terminal in the first preset range and has a bandwidth exceeding the first preset bandwidth threshold, and accesses the target second-level node, and in the process of moving the second-level node, the first video network terminal can be ensured to access the target second-level node, which is closest to the first video network terminal and has good bandwidth performance, in real time, and the problem of large communication delay between the second-level node and the first video network terminal due to the movement of the second-level node is avoided; meanwhile, when the second identification information does not exist in the dynamic information table of the target second-level node, namely the target second-level node is not a common father node of the first video network terminal and the second video network terminal, the target second-level node sends the second identification information of the second video network terminal to the accessed first-level node, the first-level node stores the network access information of all the second-level nodes and all the accessed video network terminals, the accessed first-level node determines the forwarding second-level node identification and the forwarding sequence between the first video network terminal and the second video network terminal based on the network access information, the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node, and the first video network terminal forwards the second-level node corresponding to the second-level node identification based on the forwarding sequence, the communication with the second video network terminal is not carried out through the first-level node, so that the communication pressure of the first-level node can be relieved.

Fig. 5 is a schematic structural diagram of an internet of view according to an embodiment of the present invention, and fig. 6 is a schematic structural diagram of an entity of the internet of view corresponding to fig. 5. The video network may include a space based network 501, a first video network terminal 5031, and a second video network terminal 5032. The first network terminal 5031 may be any network terminal, and the second network terminal 5032 may be any network terminal except the first network terminal 5031. The space-based network 501 may include a space-based backbone network 5011 and a space-based access network 5012, the space-based backbone network 5011 may include first-level nodes, and the space-based access network 5012 may include second-level nodes, and the first-level nodes store network access information of all the second-level nodes and all the access video network terminals.

It can be understood that the above-mentioned video network terminal, the second level node, and the first level node may perform data interaction through a video network protocol. In the embodiment of the present invention, this is not particularly limited.

Referring to fig. 7, it is a flowchart of the steps of a communication method of the video network, which may be applied to the video network, and the video network may include: a space-based network 501, a first video network terminal and a second video network terminal; the space based network may include: a space-based backbone network 5011 and a space-based access network 5012; the space-based backbone network may include: a first level node; the space-based access network 5012 may include: a second level node; the first-level node stores all network access information of the second-level nodes and all terminals accessing the video network, and the first-level nodes and the second-level nodes may be communication satellites.

In the embodiment of the present invention, optionally, the space-based backbone network may include 6 first-level nodes, that is, the space-based backbone network may be composed of 6 communication satellites, where 2 first-level nodes serve as root node servers, and each root node server may correspond to 2 first-level nodes, so that one root node server and its corresponding 2 first-level nodes may implement global communication coverage. Meanwhile, one root node server and 2 first-level nodes corresponding to the root node server can be used as a replacement for another root node server and 2 first-level nodes corresponding to the root node server, and when one root node server and 2 first-level nodes corresponding to the root node server are abnormal, another root node server and 2 first-level nodes corresponding to the root node server can provide global communication services. In the embodiment of the present invention, this is not particularly limited.

The method may specifically include steps 701-708:

step 701: when the distance between the first video network terminal and the accessed second-level node is larger than a first preset distance, the first video network terminal searches a target second-level node; the target second-level node is a second-level node which is located in a geographical area of a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold.

In this embodiment of the present invention, the first video network terminal may be any one video network terminal, and the first video network terminal may be a video network server or a single video network terminal, which is not specifically limited in this embodiment of the present invention. For example, referring to fig. 5 or fig. 6, the first video network terminal may be video network terminal 5031.

In the embodiment of the present invention, when the distance between the first video network terminal 5031 and the accessed second level node is greater than the first preset distance, the first video network terminal may search for the target second level node 50121, where the target second level node 50121 may be a second level node located in a geographic area of a first preset range of the first video network terminal 5031 and having a bandwidth exceeding a first preset bandwidth threshold.

In the embodiment of the present invention, the first preset range and the first preset bandwidth threshold may be set according to actual needs, which are not specifically limited in the embodiment of the present invention.

For example, for the above example, if the distance between the first video network terminal 5031 and the accessed second level node 50121 is greater than the first preset distance, the first video network terminal 5031 may search for the target second level node 50122, where the target second level node 50122 may be a second level node located in the first preset geographic area of the first video network terminal 5031 and having a bandwidth exceeding the first preset bandwidth threshold. That is, when the second level node 50121 moves to a distance greater than a first predetermined distance from the first internet-of-things terminal 5031, the first internet-of-things terminal 5031 can search for a target second level node 50122 which is closer to the first internet-of-things terminal 5031 and has better bandwidth.

In this embodiment of the present invention, optionally, one second-level node may access multiple video network terminals, for example, one second-level node may access 512 video network terminals, and this is not particularly limited in this embodiment of the present invention.

Step 702: and the first video network terminal sends a first network access request to the target second-level node.

In the embodiment of the invention, the first video network terminal can send the first network access request to the target second-level node. The first network access request may include first identification information of the first visual contact terminal, and the like. The first identification information of the first video network terminal may be identity information capable of identifying the first video network terminal, and the like. In the embodiment of the present invention, this is not particularly limited.

For the above example, the first video network terminal 5031 may send a first network access request to the target second level node 51222. The first network access request may include identification information of the first contact terminal, and the like. The first video network endpoint 5031 can send a first network access request to the target second level node 51222 based on a video network protocol. In the embodiment of the present invention, this is not particularly limited.

Step 703: and the target second-level node establishes a link with the first video network terminal based on the first network access request, and writes first identification information of the first video network terminal and position information of the first video network terminal into a dynamic information table of the target second-level node.

In the embodiment of the present invention, each second-level node may be provided with a dynamic information table, and the dynamic information table may store identification information, location information, and the like of the accessed video network terminal. The target second-level node may establish a link with the first video network terminal based on the first network access request, and write the first identification information of the first video network terminal and the location information of the first video network terminal in the dynamic information table of the target second-level node.

For the above example, the target second-level node 51222 may establish a link with the first internet-of-view terminal 5031 based on the first network access request, and the target second-level node 51222 writes the first identification information of the first internet-of-view terminal 5031, the location information of the first internet-of-view terminal 5031, and the like in its dynamic information table.

In the embodiment of the present invention, while or after the first video network terminal establishes the link with the target second-level node, in order to avoid resource waste and the like, the first video network terminal may disconnect the link with the aforementioned second-level node. Meanwhile, the second-level node linked with the first-level node can delete the first identification information of the first video network terminal from the dynamic information table. In the embodiment of the present invention, this is not particularly limited.

For example, for the above example, at the same time or after the target second level node 51222 establishes a link with the first video network terminal 5031, the first video network terminal 5031 may disconnect the link with the second level node 50121, which establishes the link with the target second level node, thereby avoiding waste of resources. Meanwhile, the second-level node 50121 may delete the first identification information of the first internet-of-things terminal from its dynamic information table, thereby ensuring that the latest information is stored in the dynamic information table.

Step 704: and the first video network terminal sends second identification information of the second video network terminal to the target second-level node based on the link.

In the embodiment of the present invention, the second video network terminal may be a video network terminal to be communicated with by the first video network terminal, in addition to the first video network terminal. For example, as shown with reference to fig. 5 or fig. 6, the second video network terminal can be video network terminal 5032.

In this embodiment of the present invention, the first video network terminal may send the second identification information of the second video network terminal to the target second level node based on the link. The second identification information can also be related information capable of representing the identity of the second video network terminal, and the like. In the embodiment of the present invention, this is not particularly limited.

For the above example, the first internet-of-view terminal 5031 can send the second identification information of the second internet-of-view terminal 5032 to the target second level node 50122 based on the link. The first video network endpoint 5031 can send the second identification information of the second video network endpoint 5032 to the target second level node 50122 based on the video network protocol based on the link. In the embodiment of the present invention, this is not particularly limited.

Step 705: and when the second identification information does not exist in the dynamic information table, the target second-level node forwards the second identification information to the accessed first-level node.

In this embodiment of the present invention, the target second level node may search for the second identification information in its dynamic information table, and when the second identification information does not exist in the dynamic information table, the target second level node may send the second identification information to the accessed first level node.

For example, for the above example, if the first level node 50111 accessed by the target second level node 50122 is the target second level node 50122, the target second level node 50122 may look up the second identification information in its dynamic information table, and if the second identification information does not exist in the dynamic information table, the target second level node 50122 may send the second identification information of the second internet-of-view terminal 5032 to the accessed first level node 50111.

In this embodiment of the present invention, optionally, each second-level node and the first-level node connected thereto may communicate based on an internet protocol or based on an internet protocol, which is not specifically limited in this embodiment of the present invention. For example, for the above example, the target second level node 50122 may send the second identification information to the accessing first level node 50111 based on a video networking protocol.

Step 706: and the accessed first-level node determines the forwarding second-level node identification and the forwarding sequence between the first video network terminal and the second video network terminal based on the network access information.

In the embodiment of the invention, the accessed first-level node determines the forwarding second-level node identifier and the forwarding sequence between the first video network terminal and the second video network terminal based on the network access information. That is, the first-level node to which the target second-level node accesses may determine, based on the network access information, a communication path between the first video network terminal and the second video network terminal, that is, the first-level node may implement addressing of the accessed video network terminal. The communication path may include a forwarding second-level node identifier and a forwarding order, where the second-level node identifier may be related information capable of characterizing an identity of the second-level node, and this is not particularly limited in this embodiment of the present invention.

In the embodiment of the invention, forwarding can be realized among all the second-level nodes, so that the first-level nodes are not needed, and the video networking terminals under different second-level nodes can realize communication through forwarding of the second-level nodes.

For example, for the above example, if the first level node 50111 accessed by the target second level node 50122 is the target second level node 50122, the target second level node 50122 may look up the second identification information in its dynamic information table, and if the second identification information does not exist in the dynamic information table, the target second level node 50122 may send the second identification information of the second internet-of-view terminal 5032 to the accessed first level node 50111. The first level node 50111 may determine, based on its stored network entry information, that the forwarding second level node identification and forwarding order between the first view network terminal 5031 and the second view network terminal 5032 may be: the second level node 50122 forwards to the second level node 50121, and the second level node 50121 forwards to the second level node 50123 accessed by the second video networking terminal 5032, and the second level node 50123 forwards to the second video networking terminal 5032. Alternatively, the first level node 50111 may determine, based on its stored network access information, that the forwarding second level node identity and forwarding order between the first internet-of-view terminal 5031 and the second internet-of-view terminal 5032 may be: the second level node 50122 forwards the second level node 50123 accessed by the second video networking terminal 5032, and the second level node 50123 forwards the second video networking terminal 5032. This is not particularly limited in the embodiments of the present invention.

In the embodiment of the present invention, the network access information stored in each first-level node may store location information of all second-level nodes, and the like, and identifiers of the second-level nodes accessed by all terminals accessing the video network, and the like. The first-level node to which the target second-level node is accessed can determine whether the two second-level nodes are forwarded by other second-level nodes according to the distance between the target second-level node and the second-level node to which the second video network terminal is accessed and the like. This is not particularly limited in the embodiments of the present invention.

For example, for the above example, the first level node 50111 may first determine the second level node 50123 accessed by the second video network terminal 5032 based on the stored access information, determine the distance between the target second level node 50122 and the second level node 50123 from the access information, determine whether the target second level node 50122 and the second level node 50123 are forwarded by other second level nodes according to the distance between the target second level node 50122 and the second level node 50123, and the like. This is not particularly limited in the embodiments of the present invention.

Step 707: and the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node.

In the embodiment of the invention, the accessed first-level node can send the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node.

For example, for the above example, the first level node 50111, based on its stored network access information, may determine that the forwarding second level node identification and forwarding order between the first view network terminal 5031 and the second view network terminal 5032 may be: the second level node 50122 forwards to the second level node 50121, and the second level node 50121 forwards to the second level node 50123 accessed by the second video networking terminal 5032, and the second level node 50123 forwards to the second video networking terminal 5032. Then the first level node 50111 can send the forwarding second level node identification and forwarding order, etc. described above, to the first internet of things terminal 5031 through the target second level node 50122.

Step 708: and the first video network terminal communicates with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding sequence.

In this embodiment of the present invention, the first video network terminal may communicate with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding order.

For example, for the above example, the first level node 50111, based on its stored network access information, may determine that the forwarding second level node identification and forwarding order between the first view network terminal 5031 and the second view network terminal 5032 may be: the second level node 50122 forwards to the second level node 50121, and the second level node 50121 forwards to the second level node 50123 accessed by the second video networking terminal 5032, and the second level node 50123 forwards to the second video networking terminal 5032. Then, the first internet-of-view terminal 5031 may forward, based on the forwarding order, the second-level nodes such as: the second level node 50122, the second level node 50121, and the second level node 50123 communicate with the second sighting terminal 5032. That is, for the first video networking terminal 5031 and the second video networking terminal 5032 accessing different second-level nodes, the forwarding among the second-level node 50122, the second-level node 50121, and the second-level node 50123 is passed to implement communication, and the first-level node 50111 only determines the forwarding second-level node identifier and the forwarding order, and does not specifically participate in the communication between the first video networking terminal 5031 and the second video networking terminal 5032, so that the communication pressure of the first-level node 50111 can be reduced, and meanwhile, the first-level node 50111 does not specifically participate in the communication between the first video networking terminal 5031 and the second video networking terminal 5032, so that the communication delay caused by the specific participation of the first-level node 50111 can be reduced.

In the embodiment of the invention, the method is applied to a video network, and the video network comprises the following steps: the system comprises a space-based network, a first video network terminal and a second video network terminal; the space-based network includes: a space-based backbone network and a space-based access network; the space-based backbone network comprises: a first level node; the space-based access network comprises: a second level node; the first-level node stores the network access information of all the second-level nodes and all the access video network terminals; when the distance between the first video network terminal and the accessed second-level node is larger than a first preset distance, the first video network terminal searches a target second-level node; the target second-level node is a second-level node which is located in a geographical area of a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold; the first video network terminal sends a first network access request to the target second-level node; the target second-level node establishes a link with the first video network terminal based on the first network access request, and writes first identification information of the first video network terminal and position information of the first video network terminal into a dynamic information table of the target second-level node; the first video network terminal sends second identification information of the second video network terminal to the target second-level node based on the link; when the second identification information does not exist in the dynamic information table, the target second-level node forwards the second identification information to the accessed first-level node; the accessed first-level node determines a forwarding second-level node identifier and a forwarding sequence between the first video network terminal and the second video network terminal based on the network access information; the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node; and the first video network terminal communicates with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding sequence. When the distance between the first video network terminal and the accessed second-level node is greater than a first preset distance, the first video network terminal searches for a target second-level node which is located in a geographical area within a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold value, and accesses the target second-level node; meanwhile, when the second identification information does not exist in the dynamic information table of the target second-level node, namely the target second-level node is not a common father node of the first video network terminal and the second video network terminal, the target second-level node sends the second identification information of the second video network terminal to the accessed first-level node, the first-level node stores the network access information of all the second-level nodes and all the accessed video network terminals, the accessed first-level node determines the forwarding second-level node identification and the forwarding sequence between the first video network terminal and the second video network terminal based on the network access information, the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node, and the first video network terminal forwards the second-level node corresponding to the second-level node identification based on the forwarding sequence, the communication with the second video network terminal is not carried out through the first-level node, so that the communication pressure of the first-level node can be relieved.

Referring to fig. 8, it is a step flow chart of another video network communication method of the present invention, which may be applied to the video network, and for the related description of the video network, reference may be made to the related description above, and details are not repeated here to avoid repetition. Specifically, the method can comprise steps 801-:

step 801: when the distance between the second-level node and the accessed first-level node is larger than a second preset distance, the second-level node searches a target first-level node; the target first-level node is a first-level node which is located in a geographic area of a second preset range of the second-level node and has a bandwidth exceeding a second preset bandwidth threshold.

In the embodiment of the present invention, when the distance between the second-level node and the accessed first-level node is greater than a second preset distance, the second-level node may search for a target first-level node, where the target first-level node is a first-level node located in a geographic area of a second preset range of the second-level node and having a bandwidth exceeding a second preset bandwidth threshold. The second preset range and the second preset bandwidth threshold may be set according to actual situations, and in the embodiment of the present invention, this is not specifically limited.

In an embodiment of the present invention, for example, referring to fig. 5 or fig. 6, the first level node and the second level node may be communication satellites, and when the distance between the second level node 50122 and the accessed first level node 50112 is greater than a second predetermined distance during the movement of the first level node and the second level node, the second level node 50122 may search for a target first level node 50111, where the target first level node 50111 may be a first level node located in a geographic area of the second level node 50122 and having a bandwidth exceeding a second predetermined bandwidth threshold.

Step 802: and the second-level node sends a second network access request to the target first-level node.

In this embodiment of the present invention, the second level node may send a second network access request to the target first level node. The second network access request may include an identification of the second level node, etc., and the second level node may send the second network access request to the target first level node based on a video networking protocol or an internet protocol. In the embodiment of the present invention, this is not particularly limited.

For the above example, when the second level node 50122 is a distance from the accessed first level node 50112 that is greater than a second predetermined distance, the second level node 50122 may search for a target first level node 50111, which target first level node 50111 may be the first level node located within a geographic area of the second level node 50122 that is within a second predetermined range and has a bandwidth that exceeds a second predetermined bandwidth threshold. The second level node 50122 may send a second network access request to the target first level node 50111.

Step 803: and the target first-level node establishes a link with the second-level node based on the second network access request.

In an embodiment of the present invention, the target first-level node may establish a link with the second-level node based on the second network-entry request.

For example, for the above example, the target first level node 50111 can establish a link with the second level node 50122 based on the second network access request.

In the embodiment of the invention, when the distance between the second-level node and the accessed first-level node is greater than a second preset distance, the second-level node can be searched; and the target first-level node is close to the second-level node, and the bandwidth exceeds a second preset bandwidth threshold value, so that the problem of time delay caused by long communication distance due to the movement of the first-level node and the second-level node can be avoided.

Step 804: when the distance between the first video network terminal and the accessed second-level node is larger than a first preset distance, the first video network terminal searches a target second-level node; the target second-level node is a second-level node which is located in a geographical area of a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold.

Step 805: and the first video network terminal sends a first network access request to the target second-level node.

Step 806: and the target second-level node establishes a link with the first video network terminal based on the first network access request, and writes first identification information of the first video network terminal and position information of the first video network terminal into a dynamic information table of the target second-level node.

In the embodiment of the present invention, the steps 804-806 may refer to the steps 701-703 respectively, and are not described herein again to avoid repetition.

Step 807: and the target second-level node sends the updated dynamic information table to the first-level node accessed by the target second-level node.

In the embodiment of the present invention, the target second level node may send the updated dynamic information table to the first level node to which the target second level node accesses.

For example, for the above example, if the first level node 50111 accessed by the target second level node 50122 is the target second level node 50122, the target second level node 50122 may send the dynamic information table written with the network access information of the first video network terminal 5031 to the first level node 50111 accessed by the target second level node 50122. Further, the latest network access information may be stored in the first-level node 50111, and the accuracy and the real-time performance of the forwarding of the second-level node and the forwarding sequence may be further ensured based on the latest network access information when the first-level node 50111 determines the forwarding of the second-level node and the forwarding sequence between the first-type networking terminal 5031 and the second-type networking terminal 5032.

In the embodiment of the present invention, optionally, each first-level node may update the network access information mutually, which is not specifically limited in the embodiment of the present invention.

Step 808: and the first video network terminal sends second identification information of the second video network terminal to the target second-level node based on the link.

Step 809: and when the second identification information does not exist in the dynamic information table, the target second-level node forwards the second identification information to the accessed first-level node.

In the embodiment of the present invention, the

steps

808 and 809 can refer to the

steps

704 and 705, respectively, and are not described herein again to avoid repetition.

Step 810: the network access information comprises: the dynamic information tables of all the second-level nodes, the position information of all the second-level nodes and the position information of all the access video network terminals; and the accessed first-level node determines the forwarding second-level node identifier and the forwarding sequence with the shortest distance between the first video network terminal and the second video network terminal based on the dynamic information tables of all the second-level nodes, the position information of all the second-level nodes and the position information of all the video network terminals.

In the embodiment of the present invention, the network access information stored by the first level node may include a dynamic information table of all second level nodes, location information of all terminals accessing the video network, and the like. For example, the first level node 50111 may store dynamic information tables of all second level nodes, location information of all access video network terminals, and the like.

In the embodiment of the present invention, the accessed first-level node may determine, based on the above dynamic information tables of all second-level nodes, the location information of all access video network terminals, and the like, the forwarding second-level node identifier and the forwarding order, which are the shortest distance between the first video network terminal and the second video network terminal.

For example, for the above example, if the first level node 50111 accessed by the target second level node 50122 is the target second level node 50122, the target second level node 50122 may look up the second identification information in its dynamic information table, and if the second identification information does not exist in the dynamic information table, the target second level node 50122 may send the second identification information of the second internet-of-view terminal 5032 to the accessed first level node 50111. The first level node 50111 may determine the forwarding second level node identifier and forwarding order with the shortest distance between the first view network terminal 5031 and the second view network terminal 5032 based on the network access information stored therein. For example, the determined forwarding second-level node identifier and forwarding order for which the distance between the first internet-of-view terminal 5031 and the second internet-of-view terminal 5032 is the shortest may be: the second level node 50122 forwards to the second level node 50121, and the second level node 50121 forwards to the second level node 50123 accessed by the second video networking terminal 5032, and the second level node 50123 forwards to the second video networking terminal 5032. Alternatively, the determined forwarding second-level node identifier and forwarding order with the shortest distance between the first internet-of-view terminal 5031 and the second internet-of-view terminal 5032 may be: the second level node 50122 forwards the second level node 50123 accessed by the second video networking terminal 5032, and the second level node 50123 forwards the second video networking terminal 5032. This is not particularly limited in the embodiments of the present invention.

In the embodiment of the present invention, the accessed first-level node may determine, based on the dynamic information tables of all second-level nodes, the location information of all access video network terminals, and the like, the forwarding second-level node identifier and the forwarding order with the shortest distance between the first video network terminal and the second video network terminal, so as to accelerate the communication speed between the first video network terminal and the second video network terminal.

Step 811: and the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node.

Step 812: and the first video network terminal communicates with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding sequence.

In the embodiment of the present invention, the step 811 and the step 812 may refer to the step 707 and the step 708, respectively, and are not described herein again to avoid repetition.

In this embodiment of the present invention, optionally, after the communication between the first video network terminal 5031 and the second video network terminal 5032 is finished, the target second node 50122 may notify the first level node 50111 to release the communication link resource between the forwarding second nodes, so as to save the communication resource. In the embodiment of the present invention, this is not particularly limited.

Step 813: and when the second identification information exists in the dynamic information table of the target second-level node, the first video network terminal communicates with the second video network terminal based on the link.

In this embodiment of the present invention, when the second identification information exists in the dynamic information table of the target second-level node, that is, the target second-level node is a common parent node of the first video network terminal and the second video network terminal, in this case, the method may not perform the above steps 809 to 812, and then the first video network terminal may communicate with the second video network terminal based on the link.

For example, referring to fig. 5 or fig. 6, if the first video network terminal 5031, the second video network terminal 5033, and the second level node accessed by the second video network terminal 5033 is also the target second level node 50122, that is, the target second level node 50122 is a parent node common to the first video network terminal 5031 and the second video network terminal 5033, the first video network terminal 5031 may communicate with the second video network terminal 5033 based on the link between the first video network terminal and the target second level node 50122. Specifically, the first video network endpoint 5031 may communicate based on its link with the target second level node 50122 and the second video network endpoint 5031 with the target second level node 50122.

It should be noted that for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently depending on the embodiment of the invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.

Referring to fig. 9, it is a block diagram of a communication apparatus of video network according to an embodiment of the present invention, where the apparatus 900 is applied to a video network, and the video network includes: the system comprises a space-based network, a first video network terminal and a second video network terminal; the space-based network includes: a space-based backbone network and a space-based access network; the space-based backbone network comprises: a first level node; the space-based access network comprises: a second level node; the first-level node stores the network access information of all the second-level nodes and all the access video network terminals; the apparatus may include:

a target second-level node searching module 904, configured to search for a target second-level node by the first video network terminal when a distance between the first video network terminal and an accessed second-level node is greater than a first preset distance; the target second-level node is a second-level node which is located in a geographical area of a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold;

a first network access request sending module 905, configured to send a first network access request to the target second-level node by the first video networking terminal;

a first link establishing module 906, configured to establish a link with the first video network terminal by the target second-level node based on the first network access request, and write first identification information of the first video network terminal and location information of the first video network terminal in a dynamic information table of the target second-level node;

a second identification information sending module 908, configured to send, by the first video network terminal, second identification information of the second video network terminal to the target second-level node based on the link;

a second identification information forwarding module 909, configured to forward, to an accessed first-level node, the second identification information to the target second-level node when the second identification information does not exist in the dynamic information table;

a forwarding order determining module 910, configured to determine, by the accessed first-level node, a forwarding second-level node identifier and a forwarding order between the first video network terminal and the second video network terminal based on the network access information;

a forwarding sequence sending module 911, configured to send, by the accessed first-level node, the forwarding second-level node identifier and the forwarding sequence to the first internet of things terminal through the target second-level node;

a first communication module 912, configured to communicate, by the first video network terminal, with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding order.

Optionally, on the basis of fig. 9, referring to fig. 10, the apparatus may further include:

a target first-stage node searching module 901, configured to search a target first-stage node by a second-stage node when a distance between the second-stage node and an accessed first-stage node is greater than a second preset distance; the target first-level node is a first-level node which is located in a geographic area of a second preset range of the second-level node and has a bandwidth exceeding a second preset bandwidth threshold;

a second network access request sending module 902, configured to send, by the second level node, a second network access request to the target first level node;

a second link establishing module 903, configured to establish a link with the second level node by the target first level node based on the second network access request.

Optionally, the apparatus may further include:

a dynamic information table sending module 907, configured to send, by the target second-level node, the updated dynamic information table to the first-level node to which the target second-level node accesses.

Optionally, when the second identification information exists in the dynamic information table of the target second-level node, the method may further include:

and a second communication module 913, configured to enable the first video networking terminal to communicate with the second video networking terminal based on the link.

the forwarding order determination module 910 may include:

a forwarding order determining unit 9101, configured to determine, by the accessed first-level node, a forwarding second-level node identifier and a forwarding order, which are the shortest distances between the first video network terminal and the second video network terminal, based on the dynamic information tables of all second-level nodes, the location information of all second-level nodes, and the location information of all access video network terminals.

For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

In the embodiment of the invention, the method is applied to the video network, and the video network comprises the following steps: the system comprises a space-based network, a first video network terminal and a second video network terminal; the space-based network includes: a space-based backbone network and a space-based access network; the space-based backbone network comprises: a first level node; the space-based access network comprises: a second level node; the first-level node stores the network access information of all the second-level nodes and all the access video network terminals; when the distance between the first video network terminal and the accessed second-level node is larger than a first preset distance, the first video network terminal searches a target second-level node; the target second-level node is a second-level node which is located in a geographical area of a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold; the first video network terminal sends a first network access request to the target second-level node; the target second-level node establishes a link with the first video network terminal based on the first network access request, and writes first identification information of the first video network terminal and position information of the first video network terminal into a dynamic information table of the target second-level node; the first video network terminal sends second identification information of the second video network terminal to the target second-level node based on the link; when the second identification information does not exist in the dynamic information table, the target second-level node forwards the second identification information to the accessed first-level node; the accessed first-level node determines a forwarding second-level node identifier and a forwarding sequence between the first video network terminal and the second video network terminal based on the network access information; the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node; and the first video network terminal communicates with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identifier based on the forwarding sequence. When the distance between the first video network terminal and the accessed second-level node is greater than a first preset distance, the first video network terminal searches for a target second-level node which is located in a geographical area within a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold value, and accesses the target second-level node; meanwhile, when the second identification information does not exist in the dynamic information table of the target second-level node, namely the target second-level node is not a common father node of the first video network terminal and the second video network terminal, the target second-level node sends the second identification information of the second video network terminal to the accessed first-level node, the first-level node stores the network access information of all the second-level nodes and all the accessed video network terminals, the accessed first-level node determines the forwarding second-level node identification and the forwarding sequence between the first video network terminal and the second video network terminal based on the network access information, the accessed first-level node sends the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node, and the first video network terminal forwards the second-level node corresponding to the second-level node identification based on the forwarding sequence, the communication with the second video network terminal is not carried out through the first-level node, so that the communication pressure of the first-level node can be relieved.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The foregoing detailed description of the communication method and apparatus of video networking according to the present invention is provided, and the principles and embodiments of the present invention are explained herein by using specific examples, which are merely used to help understand the method and core ideas of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A method for communication in a video network, the method being applied to the video network, the video network comprising: the system comprises a space-based network, a first video network terminal and a second video network terminal; the space-based network includes: a space-based backbone network and a space-based access network; the space-based backbone network comprises: a first level node; the space-based access network comprises: a second level node; the first-level node stores the network access information of all the second-level nodes and all the access video network terminals; the network access information comprises: the dynamic information tables of all the second-level nodes, the position information of all the second-level nodes and the position information of all the access video network terminals; the method comprises the following steps:

2. The method of claim 1, further comprising: when the distance between the second-level node and the accessed first-level node is larger than a second preset distance, the second-level node searches a target first-level node; the target first-level node is a first-level node which is located in a geographic area of a second preset range of the second-level node and has a bandwidth exceeding a second preset bandwidth threshold;

3. The method according to claim 1, wherein after writing the first identification information of the first video network terminal in the dynamic information table of the target second level node, further comprising:

4. The method of claim 1, wherein when the second identification information exists in the dynamic information table of the target second level node, further comprising:

5. The method of claim 1, wherein the accessing first level node determining a forwarding second level node identification and a forwarding order between the first video network terminal and the second video network terminal based on the network access information comprises:

6. A video networking communication system, the system being applied to a video networking, the video networking comprising: the system comprises a space-based network, a first video network terminal and a second video network terminal; the space-based network includes: a space-based backbone network and a space-based access network; the space-based backbone network comprises: a first level node; the space-based access network comprises: a second level node; the first-level node stores the network access information of all the second-level nodes and all the access video network terminals; the network access information comprises: the dynamic information tables of all the second-level nodes, the position information of all the second-level nodes and the position information of all the access video network terminals; the system comprises: the first video network terminal, the target second-level node and the accessed first-level node;

the first video network terminal is used for searching a target second-level node when the distance between the first video network terminal and the accessed second-level node is greater than a first preset distance; the target second-level node is a second-level node which is located in a geographical area of a first preset range of the first video network terminal and has a bandwidth exceeding a first preset bandwidth threshold; and is used for sending a first network access request to the target second level node;

the target second-level node is used for establishing a link with the first video network terminal based on the first network access request, and writing first identification information of the first video network terminal and position information of the first video network terminal into a dynamic information table of the target second-level node;

the first video network terminal is further used for sending second identification information of the second video network terminal to the target second-level node based on the link;

the target second-level node is further configured to forward the second identification information to the accessed first-level node when the second identification information does not exist in the dynamic information table;

the accessed first-level node is used for determining a forwarding second-level node identifier and a forwarding sequence between the first video network terminal and the second video network terminal based on the network access information; sending the forwarding second-level node identification and the forwarding sequence to the first video network terminal through the target second-level node;

and the first video network terminal is also used for communicating with the second video network terminal through the forwarding second-level node corresponding to the forwarding second-level node identification based on the forwarding sequence.

7. The system of claim 6, further comprising: the second level node and a target first level node;

the second-level node is used for searching a target first-level node when the distance between the second-level node and the accessed first-level node is greater than a second preset distance; the target first-level node is a first-level node which is located in a geographic area of a second preset range of the second-level node and has a bandwidth exceeding a second preset bandwidth threshold; and the network access control unit is used for sending a second network access request to the target first-level node;

and the target first-level node is used for establishing a link with the second-level node based on the second network access request.

8. The system of claim 6, wherein the target second level node is further configured to send the updated dynamic information table to the first level node to which the target second level node has access.

9. The system of claim 6, wherein the first video network terminal is further configured to communicate with the second video network terminal based on the link when the second identification information is present in the dynamic information table of the target second level node.

10. The system according to claim 6, wherein the accessed first-level node is further configured to determine a forwarding second-level node identifier and a forwarding order with the shortest distance between the first video network terminal and the second video network terminal based on the dynamic information table of all second-level nodes, the location information of all second-level nodes, and the location information of all access video network terminals.