Route exchange method suitable for GEO/LEO double layered constellation network

A routing and network technology, applied in the field of GEO/LEO double-layer satellite network routing and switching, can solve the problems of frequent update of routing tables, easy loss of information, node failure, etc., to reduce the number of topology snapshots, improve processing capacity, and reduce storage The effect of spending

Inactive Publication Date: 2014-07-02
中国人民解放军西安通信学院
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Problems solved by technology

It can be used to solve problems such as frequent update of routing tables and easy loss of information caused by link congestion, node failure, and continuous high-load traffic in satellite communications.

Method used

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  • Route exchange method suitable for GEO/LEO double layered constellation network
  • Route exchange method suitable for GEO/LEO double layered constellation network
  • Route exchange method suitable for GEO/LEO double layered constellation network

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Embodiment Construction

[0075] 1. Constellation model

[0076] The GEO / LEO double-layer satellite constellation model applicable to the present invention is as follows figure 1 As shown, it mainly includes GEO constellation, LEO constellation and ground system (including ground control center, ground gateway and user terminal). Among them, the GEO constellation is responsible for the routing calculation of the entire satellite network, network status monitoring, LEO satellite management and other tasks. When the workload of the LEO satellites in the management group is too heavy, it will timely divert some non-real-time data services; the LEO constellation is polar orbit or Polar-orbit constellation, responsible for ground gateway and terminal user access, packet data transmission and exchange, link status information collection and other tasks; the ground control center monitors the entire satellite network through GEO satellites, and can also modify or control it through the injection function The...

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Abstract

The invention discloses a route exchange method suitable for a GEO/LEO double layered constellation network. According to the method, a system period is divided into equal-duration time sections based on a dynamic boundary value; a GEO layer satellite high in on-board processing capacity is used for calculating the best route and the second best route for each LEO satellite; in the processes of information transmission and exchange, when loads of the LED satellites are large, the GEO satellite shares part of low priority services in time for the LED satellites, and it is guaranteed that important information is reliably transmitted in real time; when link congestion, node ineffectiveness and other emergency conditions happen in the satellite network, in order to avoid rerouting of the whole network, and the GEO satellite only calculates rerouting for affected routes; after link congestion is eliminated, the LED satellites recover route information in time before congestion in order to avoid link resource waste in the network. In the network that topology time varying happens, links are prone to congestion, on-board resources are limited, continuous high-load flows are prone to being generated, and nodes are prone to being ineffective at the special period, the method can reduce constellation system cost, shorten convergence time, save the on-board resources, increase the utilization rate of the link resources, guarantee that important information is reliably transmitted in real time and improve invulnerability and robustness of the satellite network.

Description

technical field [0001] The invention relates to a GEO / LEO double-layer satellite network routing exchange method, which belongs to the technical field of communication. Background technique [0002] Routing and switching technology is one of the key technologies for the normal operation of the network, and it is also the basis of information transmission and exchange. However, due to the problems of real-time topology changes, frequent link switching, sparse node distribution, dynamic traffic changes, transmission delays, and limited on-board processing capabilities in satellite networks, the existing routes in ground fixed networks and Ad hoc networks Switching techniques cannot be directly applied. At present, most researches on multi-layer satellite network routing and switching technology are based on certain or some specific conditions to solve specific routing and switching problems, and there is still a certain gap from the actual application requirements. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/721H04L12/751H04L12/851H04L45/02
Inventor 张景斌刘炯申普兵严丽娜马军骥王喆耶亚林樊勇
Owner 中国人民解放军西安通信学院
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