Distributed node self-adaptive routing algorithm for LEO satellite network

A distributed node and satellite network technology, applied in the field of distributed node adaptive routing algorithm for LEO satellite network, can solve the problems of poor adaptability, satellite system computing performance, storage capacity, transmission and reception capabilities, etc., to achieve Avoid the effect of route discovery

Active Publication Date: 2017-05-10
NANJING UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

Existing solutions are not very adaptable, and do not fully consider the problem of unbalanced network application scenarios and traffic distribution. They have strict requirements on the computing performance, storage capacit

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  • Distributed node self-adaptive routing algorithm for LEO satellite network
  • Distributed node self-adaptive routing algorithm for LEO satellite network
  • Distributed node self-adaptive routing algorithm for LEO satellite network

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0047] A distributed node adaptive routing algorithm facing LEO satellite network, comprising the following steps:

[0048] Step 1: Construct a grid-like LEO satellite communication system similar to the Iridium constellation.

[0049] The orbital altitude is set at 680 kilometers and the orbital inclination is 86°. Intra-orbit links can be formed between adjacent satellites in the same orbit, and inter-orbit links can be formed between satellites in adjacent orbits. After the topological structure of the entire satellite network is expanded two-dimensionally, each satellite and other satellites on the same and adjacent orbital planes establish a fast packet switching network and communication links through cross-border channels. A single satellite node can establish four inter-satellite links ISL (Inter-Satellite Link), for example, in figure 1 shown in, S 22 The...

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Abstract

The invention discloses a distributed node self-adaptive routing algorithm for an LEO satellite network. The technical characteristics are that the algorithm includes the following steps: a latticed LEO satellite communication system similar to an Iridium constellation is constructed; according to an interstar link design in a longitude and latitude direction, each satellite node is independently responsible for forwarding datagrams in a queue through a netted topological structure of a satellite constellation; and through increases and transmission of additional network state information in the datagrams, the satellite nodes sense and predict network states in different routing directions, and then the datagrams are guided to select forwarding links. The distributed node self-adaptive routing algorithm is reasonable in design. The determined self-adaptive routing mechanism balances traffic to prevent congestion through a load balancing means, and is applied to a low earth orbit Iridium-like constellation satellite network system. The network performance index of the algorithm is better than network performance indexes of other conventional algorithms. Particularly in a condition that a few routing hops is increased, the network load balancing degree is substantially increased, and the performance of the algorithm is more excellent than the conventional algorithms.

Description

technical field [0001] The invention belongs to the technical field of satellite network routing, and specifically relates to a distributed node adaptive routing algorithm for LEO satellite networks according to the state of the inter-satellite link and the load situation of the network nodes, and each satellite node is independently responsible for forwarding the data in the queue By adding and transmitting additional network status information in datagrams, individual nodes can perceive and predict network status in different routing directions, and then guide the selection of outbound links for datagrams to achieve network load balancing and performance optimization. Adaptive multipath routing algorithm. Background technique [0002] Starting with the Intelsat-1 practical commercial communication satellite, after nearly half a century of development, the communication satellite has become the space spacecraft with the largest number in orbit. Various communication satelli...

Claims

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Application Information

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IPC IPC(8): H04B7/185H04L12/707H04L12/721H04L12/751H04L12/803H04L12/863H04L12/24H04L45/02H04L45/24
CPCH04B7/1851H04L41/12H04L41/147H04L45/02H04L45/24H04L45/44H04L47/125H04L47/50
Inventor 魏松杰程浩时召伟赵茹东
Owner NANJING UNIV OF SCI & TECH
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