Double-layer satellite packet routing method based on virtual LEO group node

A node and routing technology, applied in the field of double-layer satellite packet routing based on virtual LEO group nodes, can solve problems such as failure to achieve high-level satellite constellation load balancing, GEO congestion, system performance bottlenecks, etc., to reduce snapshot switching and reduce complexity Degree, guarantee the effect of QoS routing

Active Publication Date: 2017-05-31
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, since the delay-insensitive services of LEO satellites with high link load are forwarded through the same GEO manager, it is easy to cause the congestion of the GEO, which will become the bottleneck of system performance, and the high-level satellite constellation has not been realized. load balancing

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  • Double-layer satellite packet routing method based on virtual LEO group node
  • Double-layer satellite packet routing method based on virtual LEO group node
  • Double-layer satellite packet routing method based on virtual LEO group node

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[0046] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0047] The double-layer satellite packet routing method based on virtual LEO group nodes provided by the present invention is a routing algorithm used in a MEO / LEO two-layer satellite networking system, and can be used in network protocols to solve frequent and frequent topological snapshot switching in satellite networks. The problem of unbalanced traffic load. Specifically, include the following steps:

[0048] Step S1: According to the many-to-many coverage relationship between MEO and LEO, all LEOs...

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Abstract

The invention provides a double-layer satellite packet routing method based on a virtual LEO group node. The method comprises step 1, grouping LEOs; step 2, obtaining an intra-group local routing algorithm and a border routing algorithm according to an LEO intra-group link state report and a link state report of the virtual LEO group node, and forwarding data; step 3, updating an algorithm during LEO layer intra-group ISL switching, LEO layer inter-group ISL switching and LEO / MEO layer IOL state switching; and step 4, performing congestion control and load balance on the situation of congestion in the LEO group and / or congestion at the border outside the LEO group. The method solves the problem of frequent satellite snapshot switching and the problem of load imbalance in network topology, hides LEO layer ISL link state changes and LEO / MEO interlayer IOL link state changes, reduces unnecessary snapshot switching, and improves the working efficiency of satellites by corresponding congestion control.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a double-layer satellite packet routing method based on a virtual LEO group node. Background technique [0002] The satellite network has the advantages of providing global coverage and not being restricted by geographical conditions, supports flexible and scalable network configuration, and provides high-bandwidth communication services for global users. According to the satellite's working orbit classification, different constellations have different advantages and disadvantages. LEO satellites have a small propagation delay, but the coverage of LEO satellites is limited, and more satellites are needed for global coverage, resulting in too many data packet hops in long-distance transmission dependence, thereby wasting satellite resources. The height of the GEO constellation is relatively high, and fewer satellites can be used to achieve global coverage. However, direct ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04L12/715H04L12/803
CPCH04B7/18513H04L45/04H04L47/125
Inventor 唐飞龙李书坤陈静陈龙李旭
Owner SHANGHAI JIAO TONG UNIV
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