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 ...
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)
关键词
卫星通信
滞后
低轨道
马尔可夫链
satellite communication
hysteresis
LEO
Markov chain
