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Prediction-Based Adaptive Topology Discovery and Maintenance Method for Satellite Networks

A topology discovery and satellite network technology, applied in the field of satellite communications, can solve the problems of high discovery and maintenance costs, and achieve the effects of improving resource utilization, reducing the number of transmissions, and reducing storage costs

Active Publication Date: 2019-12-10
XIDIAN UNIV
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Problems solved by technology

[0008] The purpose of the present invention is to propose a satellite network adaptive topology discovery and maintenance method based on prediction, to solve the problem of high topology discovery and maintenance overhead caused by frequent changes in network topology in the prior art, and reduce the load of network nodes. Improve utilization of satellite network resources

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  • Prediction-Based Adaptive Topology Discovery and Maintenance Method for Satellite Networks

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[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Refer to attached figure 1 , the concrete steps of the present invention are as follows:

[0028] Step 1, start the network node.

[0029] (1a) Set the six numbers of the orbits of the network nodes, that is, set the semi-major axis a of the network nodes, the eccentricity e, the orbital inclination i, the argument of perigee ω, the right ascension of ascending node Ω and the moment of perigee τ;

[0030] (1b) Set the ID of each network node in the network: that is, the ID of each node is a 128-bit unsigned integer;

[0031] (1c) Initializing the adjacency table is empty;

[0032] (1d) Initialize the link state database to be empty;

[0033] (1e) The network node periodically broadcasts a topology discovery and maintenance message with its own ID.

[0034] Step 2, the network node judges whether to reduce the broadcast period of the topology discovery and m...

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Abstract

The invention discloses a prediction-based satellite network self-adaptive topology discovery and maintenance method, which mainly solves the problem of high topology discovery and maintenance overhead caused by frequent network topology changes in the existing satellite network. The implementation steps are: 1) The network node calculates the orbital data of the node for a period of time in the future, and exchanges the orbital data with the neighbor nodes, and predicts the on-off situation with the neighbor nodes in the future based on the exchanged orbital data 2) Dynamically adjust the sending frequency of topology discovery and maintenance messages by using the predicted on-off situation; 3) When the network node finds that the actual on-off situation of the neighbor node is inconsistent with the predicted on-off situation, it will communicate with the neighbor node Re-exchange orbital data to predict the on-off situation in a new period of time in the future and synchronize it in the whole network. Compared with the prior art, the invention can realize the discovery and maintenance of the dynamic topology of the satellite network while reducing the overhead, and can be used in the satellite communication network.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and further relates to an adaptive topology discovery and maintenance method, which can be used in a satellite communication network. Background technique [0002] The satellite communication network has the characteristics of wide coverage, long communication distance, not limited by geographical conditions, good transmission quality, and flexible networking. It provides an effective solution for the realization of global real-time seamless information transmission. [0003] Satellite network topology discovery and maintenance is an important part of routing protocols and the basis for routing algorithms to calculate routes. An efficient topology discovery and maintenance protocol can reduce the energy consumption of satellite nodes, prolong the life of the network and improve link utilization. However, due to the movement of satellite nodes, the topology of satellite networks c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/751H04L12/26H04B7/185H04W84/06H04L45/02
CPCH04B7/18521H04L41/12H04L41/147H04L43/0811H04L45/02H04W84/06
Inventor 李红艳张连城李建东盛敏张琰王玺钧何润滋
Owner XIDIAN UNIV
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