摘要
星地融合组网能够有效补充地面蜂窝网络覆盖,满足6G全时全域通信需求。为深入分析星地融合组网下行成功传输概率,利用随机几何工具,采用二项式点过程和泊松点过程分别对卫星和地面基站的空间分布进行建模,推导了典型用户下行成功传输概率表达式。通过蒙特卡洛仿真验证了理论推导的正确性,并研究了星地异频组网下地面基站部署空洞半径、空间链路中正交频率信道的数量和基站密度等网络参数对下行成功传输概率的影响。研究结果表明,星地融合组网可有效解决地面基站存在部署空洞的问题;在一定范围内提高卫星频域信道划分数和增加地面基站密度均可有效提高下行成功传输概率。
Satellite-terrestrial integrated network can effectively complement the coverage of terrestrial cellular networks,meeting the full-time,full-area communication requirements of the 6G.To thoroughly analyze the downlink successful transmission probability in satellite-terrestrial integrated networks,stochastic geometry tools were employed,where binomial point processes(BPP)and Poisson point processes(PPP)were adopted to model the spatial distributions of satellites and terrestrial base stations(BSs).A closed-form expression for the downlink successful transmission probability of a typical user was derived.The accuracy of the theoretical derivation was verified through Monte Carlo simulations,and the impacts of key network parameters-including the deployment void radius of terrestrial BSs,the number of orthogonal frequency channels in spatial links,and BSs density-on the downlink successful transmission probability were investigated under satellite-terrestrial heterogeneous frequency networking.The results indicated that:the satellite-terrestrial integrated network effectively addressed the deployment void problem of terrestrial BSs;within a certain range,increasing the number of satellite frequency-domain channel partitions or terrestrial BSs density significantly improved the downlink successful transmission probability.
作者
宋紫旭
孙耀华
李睿雯
彭木根
SONG Zixu;SUN Yaohua;LI Ruiwen;PENG Mugen(State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China)
出处
《电信科学》
北大核心
2025年第5期72-83,共12页
Telecommunications Science
基金
国家自然科学基金资助项目(No.62371071)。
关键词
星地融合组网
随机几何
下行成功传输概率
二项式点过程
泊松点过程
satellite-terrestrial integrated network
stochastic geometry
downlink successful transmission probability
BPP
PPP
