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A routing exchange method suitable for geo/leo two-layer 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: 2017-03-15
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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  • A routing exchange method suitable for geo/leo two-layer constellation network
  • A routing exchange method suitable for geo/leo two-layer constellation network
  • A routing exchange method suitable for geo/leo two-layer 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 routing exchange method suitable for GEO / LEO double-layer satellite constellation network. This method divides the system cycle based on long periods of time such as dynamic boundary values; uses GEO layer satellites with strong processing capabilities on the satellite to calculate the optimal path and suboptimal path for each LEO satellite; in the process of information transmission and exchange, when the LEO satellite When the load is heavy, GEO satellites will share some low-priority services for it in time to ensure real-time and reliable transmission of important information; Only rerouting calculations are performed for the affected paths; after the link congestion is eliminated, in order to avoid the waste of link resources in the network, LEO satellites restore the pre-congestion routing information in time. In the satellite network with time-varying topology, easy link congestion, limited on-board resources, continuous high-load traffic and easy node failure in special periods, this method can reduce constellation system overhead, shorten convergence time, and save on-board resources. Improve link resource utilization, ensure real-time and reliable transmission of important information, and enhance the 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 Patents(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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