LEO卫星通信中基于服务质量的综合加权接入策略

黄飞; 许辉; 周恒; 吴诗其

doi:10.3724/SP.J.1146.2007.00471

LEO卫星通信中基于服务质量的综合加权接入策略

doi: 10.3724/SP.J.1146.2007.00471

基金项目:

国家自然科学基金(60496313)资助课题

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出版历程
- 收稿日期: 2007-03-29
- 修回日期: 2007-10-08
- 刊出日期: 2008-10-19

QoS Based Average Weighted Scheme for LEO Satellite Communications

摘要

摘要: 该文首先建立了LEO卫星全球业务密度，提出4种卫星接入和卫星间切换策略，并对LEO卫星通信的新呼叫阻塞概率和强制中断概率在这4种策略下的性能进行了仿真分析，然后在简单综合加权策略的基础上，根据全球各个地区不同的地形、地表以及通信业务的特点，提出了基于服务质量的综合加权策略。仿真结果表明根据实际地理情况采用改进的综合加权策略，新呼叫阻塞率和切换失败率得到了较大的改善。
- LEO卫星通信 /
- 服务质量(QoS) /
- 接入策略
Abstract: A LEO global traffic model is first built, then four access and handoff strategies for LEO satellite communication are proposed, and these strategies performance, including call blocking probability and call termination probability, is evaluated through computer simulation. Based on the simple average weighted scheme, a QoS based average weighted scheme is proposed according to the characteristics of the topography and traffic density all over the world. The simulation results show that the proposed scheme can reduce Call Blocking Probability (CBP) and Call Dropping Probability (CDP) considerably.
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