低轨卫星星座动态波束关闭算法

doi:10.11959/j.issn.1000-436x.2020065

Abstract

Abstract:

Aiming at the problems of the relatively dense coverage of the satellites in the space segment of the low earth orbit (LEO) multibeam satellite constellation network,which resulted in relatively dense areas in some regions,causing severe inter-beam interference and unnecessary beam resource overhead,a beam shut-off algorithm was proposed with global coverage requirements.The dynamic beam shut-off (DBSO) optimization problem was formulated in LEO multibeam satellite constellation network.Then,the problem was proved to be NP-complete and a heuristic DBSO algorithm was proposed.Simulation scenario considers the Iridium constellation network scenario with total 3 168 beams,and it shows that the number of required activated beams is only 1 913 with 39.61% beam resource reduction.

Key words: satellite network, low earth orbit satellite constellation, beam shut-off, heuristic method

CLC Number:

TN927+.2

Shuaijun LIU,Yuemei HU,Chunshi FAN,Teng LING,Lixiang LIU. Dynamic beam shut-off algorithm for LEO satellite constellation[J]. Journal on Communications, 2020, 41(4): 190-196.

Figures/Tables 9

参数名称	参数设置
LEO卫星星座	铱星星座
卫星个数	N_S=66
轨道面个数	6
顺行相邻轨道面RAAN差	31.6°
逆行相邻轨道面RAAN差	22°
轨道面内卫星个数	11
相邻轨道面平近点角差	16.4°
轨道高度/km	h=780
轨道倾角	i=86.4°
单星波束个数	N_B=48
星座总波束个数	N_B,tot=3 168
正在进行业务传输的波束	$B_{serving} = {b_{i, j} \| j = 1}$
终端分布	全球，1纬度×1经度
终端个数	N_G=86 400
终端通信最小仰角	8.2°
迭代控制门限参数	N_Th=100

References 14

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波束	波束宽度	方位角	俯仰角
波束1	22.00°	120.00°	11.00°
波束2	22.00°	100.89°	29.10°
波束3	22.00°	139.11°	29.10°
波束4	22.00°	-180.00°	22.00°
波束5	22.00°	96.59°	47.95°
波束6	22.00°	120.00°	44.00°
波束7	22.00°	143.41°	47.95°
波束8	22.00°	166.10°	39.66°
波束9	22.00°	-42.62°	39.66°
波束10	22.00°	80.00°	66.91°
波束11	22.00°	15.94°	61.25°
波束12	22.00°	-15.94°	61.25°
波束13	22.00°	-80.00°	66.91°
波束14	22.00°	-90.00°	58.21°
波束15	22.00°	-90.00°	55.00°
波束16	22.00°	-90.00°	58.21°

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Dynamic beam shut-off algorithm for LEO satellite constellation

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