移动卫星网络中卫星切换调度研究

摘要 针对卫星切换调度问题,提出了一种最大服务时长切换调度算法. 该算法利用了现有的GPS基础设施和卫星网络中卫星的多样性(即在任意时刻多颗卫星覆盖相同的区域),减少了用户在通信过程中的切换次数,从而最终降低了用户的掉话率,实现了用户在低轨(LEO)卫星网络中实时高效的切换. 在Iridium卫星网络中的仿真结果验证了该算法的有效性.
A new satellite handover scheduling algorithm based on the maximum residual service time was proposed. The algorithm exploits both global positioning system (GPS) infrastructure and satellite diversity, providing a simple and real-time handover management in low earth orbit (LEO) satellite networks to minimize the expected number of satellite handovers. It reduces the users' call drop probability ultimately. Simulations were carried out on the typical Iridium satellite network and the simulation results corroborate the advantages gained by the proposed algorithm.