Load balancing routing method based on ant colony optimization in low earth orbit satellite network

A low-orbit satellite, load balancing technology, applied in the field of satellite communications, can solve the problems of complex algorithm calculation, unable to provide service quality, reduce the effectiveness of inter-satellite routing, etc., to achieve improved reliability, low latency, and good load balancing. Effect

Active Publication Date: 2021-02-05
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] At present, the most commonly used on-board routing algorithm is still based on the continuous snapshot routing algorithm under the virtual topology control strategy. This algorithm is not only computationally complex, but also needs to calculate

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  • Load balancing routing method based on ant colony optimization in low earth orbit satellite network
  • Load balancing routing method based on ant colony optimization in low earth orbit satellite network
  • Load balancing routing method based on ant colony optimization in low earth orbit satellite network

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] figure 1 It is a flowchart of a load balancing routing method based on ant colony optimization in a low-orbit satellite network, such as figure 1 As shown, it specifically includes the following steps:

[0020] S1. Any ant calculates the routing probability of the link adjacent to the current satellite based on the link distance, delay jitter and congestion level between satellites, and selects the next hop satellite based on the principle of maximum p...

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Abstract

The invention belongs to the technical field of satellite communication, and relates to a load balancing routing method based on ant colony optimization in a low earth orbit satellite network. The routing method comprises the steps that any ant calculates the routing probability of a link adjacent to a current satellite based on the link distance, delay jitter and congestion degree between satellites, and selects a next hop satellite according to the maximum probability principle; forwarding the data packet to a next-hop satellite, updating pheromones on a current satellite passing path according to a local updating formula, and continuing to select the next-hop satellite according to a maximum probability principle; otherwise, forwarding the data packet to a target satellite, and updatingpheromones on all links on the routing topology according to local update and global update formulas; after all ants complete link routing of the satellite, selecting a path with the lowest time delay as a routing path of the current satellite. According to the invention, low time delay can be ensured, the flow can be guided to be distributed on an idle link, and the reliability of the whole network is improved.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and relates to a load balancing routing method based on ant colony optimization in a low-orbit satellite network. Background technique [0002] Since the height of Low Earth Orbit (LEO) satellites is generally about 1000km, compared with medium and high orbit satellites with altitudes above 20,000km, low earth orbit satellites have shorter signal transmission paths, smaller signal delay and power loss, and are becoming increasingly popular. A hot topic in the field of satellite communications. However, in addition to the low orbital altitude, the LEO satellite network also has the characteristics of frequent link switching and highly dynamic topology changes, and the routing calculation overhead will greatly occupy limited on-board computing resources. In addition, due to the large scale of the constellation, it is difficult for the routing protocols of the terrestrial network to...

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Application Information

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IPC IPC(8): H04L12/803H04B7/185
CPCH04L47/125H04B7/185
Inventor 李云郑丹吴广富
Owner CHONGQING UNIV OF POSTS & TELECOMM
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