低轨道卫星通信中越区切换信道分配算法研究  

A Study to Channel Allocation Scheme for Handoff in LEO Satellite Communications

作　　者：肖英[1] 叶强[1] 

机构地区：[1]中国计量学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2009年第5期58-61,共4页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家公益检测专项资助项目(10461)

摘　　要：该文根据低轨道卫星通信中,呼叫请求到达的特点,以带滞后结构的马尔可夫链模型来模拟信道的占用和分配状态,对新呼叫阻塞率和切换呼叫中断率进行评估。仿真结果表明:较低通信量负载时,这种信道分配策略简单有效,在保证切换呼叫中断率小于0.05%的情况下,呼叫阻塞率大大降低,同时提高资源利用率。This paper simulates the states of occupied channels and allocated channels using Markov Chain model with hysteresis based on the characteristics of input traffic in low earth orbit(LEO) satellite communications,to e-valuate the call blocking probability and dropping probability.The simulation results show that with lower traffic load,this method is simple and efficient,blocking probability decreases dramatically,and resource utilization is im-proved little in the case of handoff dropping probability being ...

关 键 词：卫星通信 滞后 低轨道 马尔可夫链 

分 类 号：TN927.2[电子电信—通信与信息系统]