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Satellite relay selection optimization method based on geographic location information

A technology of geographical location information and optimization method, which is applied in the field of satellite relay selection optimization based on geographical location information, can solve the problems of communication system performance to be improved, high frequency of interruption, etc., and achieve the effect of reducing the probability of interruption and improving performance

Active Publication Date: 2017-09-12
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Under the traditional round-robin scheduling relay selection scheme, the frequency of system interruption is high, and the performance of the communication system needs to be improved

Method used

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  • Satellite relay selection optimization method based on geographic location information
  • Satellite relay selection optimization method based on geographic location information
  • Satellite relay selection optimization method based on geographic location information

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] Such as figure 1 As shown, the system model of this embodiment includes a source node on the earth's surface, a destination node and multiple satellite relays located in the sky. The purpose of using multiple satellite relays is to improve the reliability of system transmission information.

[0033] A satellite relay selection optimization method based on geographical location information, considering the actual situation such as the geographical location inform...

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Abstract

The invention discloses a satellite relay selection optimization method based on geographic location information. A spatial transmission distance between two hops of links from a source node to a destination node via a candidate satellite relay is measured and corresponding instantaneous channel state information is obtained by estimation; a relay satellite capable of decoding source node information is selected from all satellite relay nodes; a relay satellite with optimal channel state information to the destination node is selected to forward source node information; and then the destination node receives and decodes the source node information forwarded by the satellite relay. Compared with the traditional cyclic scheduling plan, the provided relay selection optimization plan enables the system interruption probability to be reduced and the system performance to be improved.

Description

technical field [0001] The present invention belongs to the technical field of wireless communication, and in particular relates to a satellite relay selection optimization method based on geographic position information. Background technique [0002] Satellite mobile communication, with its advantages of wide coverage and unaffected by geographical conditions, can complement ground communication systems and is widely used in areas where ground communication systems are difficult to cover or where construction costs are too high. When the ground wireless network base station is damaged (such as during earthquake relief), satellite communication can guarantee communication services in a timely and reliable manner, which plays an extremely important role. [0003] However, when the source node on the earth's surface sends information to the satellite relay and the satellite relay forwards the information back to the destination node on the earth's surface, the wireless signal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/18515H04B7/18519H04B7/18547H04B7/18573
Inventor 邹玉龙吴杭曹未丰朱佳
Owner NANJING UNIV OF POSTS & TELECOMM
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