一种无中心FDMA卫星通信系统资源控制策略及其半实物仿真  

Resource control strategy and semi⁃physical simulation for acentric FDMA satellite communication system

作　　者：孙凯[1] 陆振宇[1] SUN Kai;LU Zhenyu(Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学,江苏南京210044

出　　处：《现代电子技术》2021年第15期28-34,共7页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(61773220);江苏省自然科学基金资助项目(BK20150523)。

摘　　要：针对特定需求应用环境下存在中心卫星通信系统抗毁性差的问题,提出一种基于FDMA体制的无中心卫星通信自组网方法,充分考虑了卫星通信流程中不可避免会出现的各类异常情形(如信道检测出错、多用户抢占信道资源发生碰撞以及在CSC信道中以ALOHA争用的方式发送通信申请产生丢包等),更加贴近工程应用需求。同时,提出一种具有C/S架构的半实物仿真验证方法,构建了半实物的仿真验证平台,模拟仿真得到呼通率与信道数、用户数、业务平均到达时间、业务平均通话时长四者之间的关系曲线图,对比分析在不同条件下呼通率的变化情况,验证了文中提出的无中心FDMA卫星通信系统资源控制策略的可行性和正确性。In view of the poor survivability of centralized satellite communication system in special application environment,an acentric satellite communication ad hoc network method based on FDMA(frequency division multiple access)system is proposed.In the method,all kinds of abnormal situations(such as inaccurate channel detection,collision caused by the fact that multiple users preempt channel resources and packet loss caused by sending communication application by ALOHA contention in CSC channel)that will inevitably occur in the satellite communication process are fully considered,which is more close to the engineering application requirements.A semi⁃physical simulation verification method with C/S architecture is proposed to construct a semi⁃physical simulation verification platform.The relation curve graph of call completion rate and channel number,call completion rate and number of users,call completion rate and average service arrival time and call completion rate and average service call duration were obtained by simulation.The change of call completion rate under different conditions is compared and analyzed.The feasibility and correctness of the resource control strategy for the acentric FDMA satellite communication system proposed in this paper have been verified.

关 键 词：无中心 FDMA 卫星通信 资源控制策略 半实物仿真 C/S架构 甚小孔径终端 5G 

分 类 号：TN927.2-34[电子电信—通信与信息系统]