多层卫星通信网络结构设计与星际链路分析  

Design and Analysis of Multilayer Satellite Communication Network Structure

作　　者：王伟[1] 梁俊[1] 肖楠[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《电视技术》2011年第23期114-117,共4页Video Engineering

摘　　要：针对单层卫星网络时延高、网络阻塞概率大等问题,研究了多层卫星网络的系统结构及其特点。为解决单一轨道对卫星性能发挥的限制问题,结合不同轨道卫星特点,引入分层卫星网络结构,采用Walker和极轨星座覆盖带设计法,设计了多层卫星网络星座。针对"强连接"模型中星际链路冗余度过高的问题,采用"弱连接"模型作为星际链路建立的基本原则,并对星座的覆盖性能和星际链路特性进行了仿真分析,结果表明,多层卫星网络在覆盖特性和星际链路性能上更具优势。The structure and characteristics of the multilayer satellite network is studied in allusion to the problems of single satellite network such as long time-delay, high snarl-up rate. In order to solve the problem as constrains of satellite performance in single orbit, structure of layered satellite net- work is introduced combined with the features of satellites in different orbit heights, and a constellation of multilayer satellite network is designed by walker and coverage band of polar-orbit. As the redundancy in strong-connect model is too high, the weak-connect model is introduced as the basic principle of ISL foundation. The coverage rate of the constellation and the identity of ISL are simulated and analyzed, the result indicates that the multilayer satel- lite network has more advantages on coverage ability and ISL identity.

关 键 词：卫星通信 多层网络 星座设计 星际链路 “弱连接”模型 

分 类 号：TN915[电子电信—通信与信息系统]