基于业务优先级的认知卫星网络频谱分配方法

doi:10.11959/j.issn.1000-436x.2019080

Abstract

Abstract:

By using spectrum allocation technology of cognitive radio into integrated satellite and terrestrial networks,the satellite communication network can share spectrum with the terrestrial network and improve utilization efficiency of frequency spectrum in the satellite communication system.Firstly,a spectrum resource sharing model in integrated satellite and terrestrial networks was introduced,and the scenery that cognitive satellite downlinks use the vacant spectrum of terrestrial network was analyzed.Then,the interference and signal model was analyzed.Finally,considering different priority types of satellite terrestrial terminals,a spectrum allocation scheme based on priority was proposed,which could ensure the total throughput in satellite downlink communication and increase the throughput of high-priority terrestrial terminals.

Key words: integrated satellite and terrestrial networks, spectrum allocation, priority, cognitive radio

CLC Number:

TN91

Min JIA,Xiaoye JING,Xiaofeng LIU,Feng LIU,Qing GUO,Xuemai GU. Spectrum allocation method for cognitive satellite network based on service priorities[J]. Journal on Communications, 2019, 40(4): 140-148.

Figures/Tables 6

卫星网络参数	数值
下行链路信道带宽/ MHz	66
认知频带/ GHz	17.7～19.7（共30信道）
GEO卫星位置	13oE
全向辐射功率（EIRP）/ dBW	65
$G_{T}^{SAT} (m) / d B i$	49.60～54.63
$I_{down}^{co} / d B i$	-7.37～-14.16
小区复用方式	4色复用
$G_{R}^{FSS} (0) / d B i$	42.1
卫星高度/ km	35 786
$N_{0} / d B W$	-126.46
地面终端高度/m	15

References 26

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FS地面系统参数	数值
天线类型	ITU-F F.1245-2
天线增益/dBi	5.3～41
全向辐射功率（EIRP）/dBW	32.9～54.3
天线高度/m	0～187
带宽/MHz	13.7～55

权重数值	P ₁优先级的地面终端全部分配到信道/次	P ₂优先级的地面终端全部分配到信道/次	P ₃优先级的地面终端分配到信道/次
P₁=0.45,P₂=0.3,P₃=0.25	91	87	15
P ₁=0.5,P₂=0.3,P₃=0.2	95	91	11
P ₁=0.6,P₂=0.3,P₃=0.1	99	98	2

Spectrum allocation method for cognitive satellite network based on service priorities

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