空间无线Adhoc网络切换管理及性能优化

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。文章分析了空间卫星网络移动性特性，探讨了几种卫星网络移动管理方案，并结合网络交叉层设计方法优化移动管理及切换性能，并进行仿真分析。%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 round the earth, the connection between satellite and 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. Firstly this paper discuss the mobility characteristics of space satellite network and mobility management schemes;Secondly the cross-layer design approach is proposed and the handoff performance is improved. At last the simulation is done.