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Space-based network broadcasting method

A space-based network and broadcasting network technology, applied in the field of routing broadcasting and space-based network broadcasting, can solve the problems of reducing the success rate of message transmission, wasting satellite network bandwidth, and not finding related patents, so as to improve the anti-destroy performance and reduce the number of channels The effect of congestion and broadcast overhead reduction

Inactive Publication Date: 2012-02-15
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventors found that in the space-based network, uncontrolled "flooding" will bring the following broadcast storm (Broadcast Storm) problem: (1) generate a large number of repeated messages, which makes the bandwidth of the satellite network wasted; (2) due to Shared transmission medium causes a large number of conflicts and collisions, reducing the success rate of message transmission
[0011] Searched with the keyword "MEO AND broadcasting", but found no related patents

Method used

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Examples

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Effect test

Embodiment 1

[0087] The present invention is a space-based network broadcasting method, referring to figure 1 , the realization of the present invention in MEO layer satellite network broadcasting comprises:

[0088] Each satellite node in the MEO layer of the space-based network sets and maintains a Figure 4 The repeating message table of format, this repeating message table is used for recording the information such as the source satellite node address (such as CDMA code) of the broadcast message that receives, the sequence number of message (monotonically increasing) and sending time (time stamp), and satellite node utilizes These information determine whether the received message is a duplicate message, so that a large amount of duplicate information can be discarded, saving bandwidth consumption for the satellite network;

[0089] Each satellite node in the MEO layer of the space-based network is set up and maintains a Figure 5 The single-step adjacency table shown (MEO satellites...

Embodiment 2

[0105] The present invention is a space-based network broadcasting method, referring to figure 2 , the realization of the present invention at the LEO layer satellite network broadcasting includes:

[0106] Each satellite node in the LEO layer of the space-based network sets and maintains a Figure 4 The repeating message table of format, this repeating message table is used for recording the information such as the source satellite node address (such as CDMA code) of the broadcast message that receives, the sequence number of message (monotonically increasing) and sending time (time stamp), and satellite node utilizes This information determines whether the received message is a duplicate message;

[0107] LEO layer satellites are set up and maintain an attached Figure 6 The two-step adjacency table shown (the number of LEO satellites is large, the coverage area is small, and the number of retransmissions is relatively large, so the two-step adjacency table needs to be se...

Embodiment 3

[0125] The broadcasting method of the space-based network is the same as that in Embodiment 1 and Embodiment 2. The duplicate information table established in the initial state is shown in Figure 4, set the source satellite node address, message sequence number and sending time in the repeat information table, where the message sequence number is presented in the form of monotonically increasing. The repeated message table is used to record information such as the source satellite node address (such as the CDMA code) of the broadcast message received, the sequence number (monotonically increasing) and the sending time (time stamp) of the message, and the present invention arranges the repeated message table so that the MEO satellite node And LEO satellite nodes can use this information to determine whether the received message is a duplicate message, so that a large amount of duplicate information can be discarded, so that the broadcast overhead is greatly reduced, and bandwi...

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Abstract

The invention discloses a space-based network broadcasting method, which solves the problem of waste of satellite network bandwidth caused by a large amount of repeated messages generated by a Flooding broadcasting mode in the existing space-based network routing protocol and the problem of a large amount of collision and crash and low success rate of message transmission caused by sharing of the transmission medium. The method comprises the following steps of: respectively setting a repetition information sheet on an MEO (Medium Earth Orbit) satellite and LEO (Low Earth Orbit) satellite to record broadcast messages received by satellite nodes; setting a single-step adjacency table on the MEO satellite, and setting a two-step adjacency table on the LEO satellite; and selecting some satellite nodes from adjacent nodes by the MEO satellite and the LEO satellite, wherein the selected satellite nodes are used as broadcasting nodes, only the broadcasting nodes broadcast and forward the messages, and the messages are finally transmitted to all the satellite nodes in the same layer through the broadcasting nodes. In the method, based on selective forwarding operation, same-layer satellite network broadcasting overhead caused by Flooding is effectively reduced. And the method can be used for the MEO layer satellite and the LEO layer satellite to execute efficient broadcasting among the networks in the same layer.

Description

technical field [0001] The invention belongs to the technical field of space-based satellite communication, and mainly relates to a routing broadcasting technology in a satellite network, in particular to a space-based network broadcasting method. It can be used for medium-orbit satellite (Medium Earth Orbit, MEO) layer and low-orbit satellite (Low Earth Orbit, LEO) layer satellites to perform efficient broadcasting between networks of the same layer. Background technique [0002] In recent years, with the rapid development and rapid application of aerospace technology, more and more satellites have been deployed in space, which has greatly expanded the communication range. The modern satellite system has developed from a single satellite to multiple satellites according to a certain constellation. Regularly formed satellite network. The strategic position of space in the military, political and economic fields is becoming increasingly important, and the development of a sp...

Claims

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Application Information

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IPC IPC(8): H04H20/74H04L12/56H04B7/185H04L45/16
Inventor 郝选文马建峰曾勇任方刘小跃钟焰涛
Owner XIDIAN UNIV
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