摘要
低轨卫星移动通信系统是当前通信领域研究的一个热点,它的移动性管理策略对整个系统的性能有着至关重要的作用,本文从位置管理和切换管理两个方面介绍了目前国内外较为先进的策略,并且重点介绍了目前处理低轨卫星通信系统独有的多星覆盖问题效果最好的仰角和覆盖时间加权策略和把切换和路由有机结合的最小跳数切换策略,它们都很大的提高了系统的性能。
In recent years, research of LEO mobile satellite communication systems is a hot point and its mobile management strategy plays an important role system＇s performance.This paper introduced some forerunner strategies domestic and abroad in both location management and handover management, emphasized two advance strategies improve perfoance of the system. One solves the problem of MT（Mobile Terminal） covered by more than one satellite simultanceously in LEO satellite network much better than other ways currently that considers both the devation angle factor and the time during which the MT remains covered by the same satellite.The other is named minlmal-hops handover strategy that combines the handover procedure with routing and solves the inter-satellite handover issue efficiently.
出处
《中国测试技术》
2006年第4期113-116,共4页
CHINA MEASUREMENT & TESTING TECHNOLOGY
关键词
LEO
移动性管理
位置管理
切换
多星选择策略
仰角
LEO
Mobile management
Location management
Handover
Multi-satellite selection strategy
Elevation angle
