卫星网络切换问题研究及性能优化  

Research of Satellite Network Handoff Problem and Performance Optimization

作　　者：王春锋 

机构地区：[1]钱学森空间技术实验室,北京100094

出　　处：《中国电子科学研究院学报》2016年第1期36-39,共4页Journal of China Academy of Electronics and Information Technology

基　　金：863国家高技术研究发展计划资助项目(2012AA120601);973国家重点基础研究发展计划项目(2014CB845303)

摘　　要：对地观测系统已经从单一平台发展成为多星组网系统,基于星间链路的卫星组成了一个空间无线Ad hoc网络系统,在卫星运动的过程中,不同的卫星与地面站在不同的时刻连通,需要解决卫星网络的移动管理和切换问题。本文讨论了空间卫星网络移动性特性,对已有的卫星切换方法进行了分析,指出了这些方法的缺陷,提出了采用交叉层设计和网络编码联合设计方案,减少切换时延和丢包率,从而改善卫星网络切换性能。The earth observation system has evolved from a single satellite platform to a multi-satellite network system. The satellites based on inter-satellite links form a space wireless Ad hoc network system.When the satellites move around the earth,the connection of the satellite with ground will transfer from a ground station to another ground station. In order to ensure the continuity of communication,the mobile and handoff management problem of satellite network must be solved. This paper discuss the mobility characteristics of space satellite network,analyses existing handoff method for satellite network and points out the limitations of these methods. A joint design scheme of cross layer design and network is proposed and the scheme can reduce the handoff delay and packet loss rate,so the handoff performance of satellite network is optimized.

关 键 词：空间无线Ad HOC网络 移动管理 切换 网络编码 

分 类 号：TP393.02[自动化与计算机技术—计算机应用技术]