基于虚拟拓扑的低轨卫星路由切换算法仿真  

Simulation of LEO Satellite Route Switching Algorithm Based on Virtual Topology

作　　者：童文婷 黄圣春[2] 王玲[1] TONG Wen-ting;HUANG Sheng-chun;Wang Lin(College of Electrical and Information Engineering,Hunan University,Changsha Hunan 410082,China;College of Electronic Science,National University of Defense Technology,Changsha Hunan 410073,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙420082 [2]国防科技大学电子科学学院,湖南长沙410073

出　　处：《计算机仿真》2021年第9期31-34,75,共5页Computer Simulation

基　　金：国家自然科学基金项目(61601482)。

摘　　要：针对低轨卫星网络中星地链路、星间链路的不断切换会造成路由重构,而星地路由重构时间过长将严重影响数据传输时延稳定性的问题,提出一种卫星路由切换算法。算法结合了卫星网络拓扑可预测性和地面电台动态性的特点,在动态路由计算的过程中加入静态可预测信息以降低动态路由的计算开销,并基于OPNET搭建了一个低轨卫星系统仿真平台来验证该协议。仿真结果表明,上述协议能有效的解决低轨卫星系统路由重构的问题,降低了丢包率,减少了系统端到端时延。Aiming at the problem that the continuous switching of satellite-ground links and inter-satellite links in Low-Earth-Orbit satellite networks will cause route reconstruction, and the long-time of satellite-ground route reconstruction will seriously affect the stability of data transmission delay, a satellite routing Switching algorithm is proposed.This algorithm combines the characteristics of satellite network topology predictability and ground station dynamics.It adds static predictable information to the dynamic routing calculation process to reduce the calculation overhead of dynamic routing.Based on OPNET, a Low-Earth-Orbit satellite system simulation platform was built to verify the agreement.Simulation results show that the protocol can effectively solve the problem of routing reconfiguration of Low-Earth-Orbit satellite systems, reduce the packet loss rate, and reduce the end-to-end delay.

关 键 词：低轨卫星系统 路由重构 虚拟拓扑 路由切换 

分 类 号：TN927.23[电子电信—通信与信息系统]