An efficient link-building strategy for cross seam in LEO satellite network

doi:10.7523/j.ucas.2021.0039

Abstract

Abstract: Recently, the low earth orbit (LEO) satellite communication system has received wide attention from academia and industry, due to its global coverage and flexible construction. In the LEO satellite communication system, satellites are connected to a dynamic network through the inter-satellite link (ISL). How to reduce the communication delay of the network is an urgent research problem to be solved. For the problem of cross seam link-building of the Walker polar orbit constellation, this paper proposes a star cross looping link-building strategy (SCLBS). SCLBS divides the orbits into multiple cross link-building areas on both sides of cross seam and the transmission delay can be optimized by dynamically established ISL, providing a stable link-building scheme for polar orbit cross seam. SCLBS is applied to actual business scenarios such as the airplane and ship, and the test results show that SCLBS can effectively reduce the transmission delay by 30% to 60% compared with the link-building strategies based on the nearest satellite criterion and the longest visible time criterion, and significantly improve system performance.

Key words: LEO satellite, ISL, time delay, cross seam, link-building strategy

CLC Number:

TN927+.2

LIU Yuting, TIAN Feng, LI Guotong. An efficient link-building strategy for cross seam in LEO satellite network[J]. Journal of University of Chinese Academy of Sciences, 2023, 40(2): 240-249.

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