星地网络中基于感知的频谱共享方法

Sensing-Based Spectrum Sharing Method in Satellite-Terrestrial Network

针对星地网络中卫星上行链路与地面网络频率共享问题,挖掘频率共享空间可能性,搭建基于周期感知的机会频谱接入模型;研究感知时长与卫星上行链路吞吐量权衡问题,证明吞吐量是关于感知时长的凹函数;对时变信道引入多时隙感知和协作感知方法,分析两种方法对感知性能的提升。仿真结果表明,设计卫星网络的感知时长可以最大化上行链路吞吐量,多时隙感知和协作感知策略可以进一步提升卫星网络吞吐量。

Considering the spatial possibility of opportunistic spectrum sharing,sensing-based spectrum sharing method ws applied in the satellite-terrestrial network.The sensing-throughput tradeoff problem was studied,and the throughput is a concave function of the sensing duration was proved.In order to further improved the satellite uplink throughput,the multi-slots sensing method and the cooperative sensing method were proposed.Computer simulations showed that the optimal sensing duration could maximized the uplink throughput,and the multi-slot sensing method or the cooperative sensing method could further improved the throughput of satellite network.