低轨卫星通信网络中改进的综合加权接入算法

摘要

针对用户终端有效与可靠接入低轨卫星通信网络的需求,基于现有的接入算法,综合考虑了卫星对用户终端的覆盖时间、卫星空闲信道数以及卫星接收信号的信噪比因素,提出了一种改进的综合加权接入算法,对该算法的目标函数和参数进行了设计与计算.仿真结果表明,采用改进的综合加权接入算法,新呼叫阻塞率和强制中断率等性能都得到了明显的改善.%According to the problem of the demand that the user terminal accesses LEO satellite communication networks effectively and safely,the coverage time of the satellite for the terminals,the number of the idle channels of the satellite and the SNR of the access signals based on the existing access algorithm are synthesized to propose an improved average weighted access algorithm.The objective function and parameters of the algorithm are also designed and calculated in this paper.The simulation results show that the improved weighted access algorithm can reduce call blocking probability(CBP) and call dropping probability(CDP) considerably.