GEO卫星与地面移动通信网络多覆盖下切换研究  

Strategy of handover in integrated GEO satellite and terrestrial networks

作　　者：张一杰[1,2] 陈建州[1,2] 刘立祥[1] 

机构地区：[1]中国科学院软件研究所天基综合信息系统重点实验室,北京100190 [2]中国科学院大学信息工程与技术学院,北京100049

出　　处：《计算机工程与设计》2013年第10期3361-3365,共5页Computer Engineering and Design

基　　金：国家共性软件预研基金项目(615010305)

摘　　要：通过分析GEO卫星与地面移动通信网络多覆盖下的信号分布特点和终端运动特点,提出了终端在通话过程中切换次数的估计方法。利用切换过程中产生的信令数目、切换延迟、信号质量和丢包情况建立了切换代价模型,以量化切换对通话质量的影响。在此基础上提出了基于代价估计的切换判决算法。仿真结果表明,该算法相比于传统算法,能显著降低高速终端的切换次数和切换延迟,提高了切换效率。By analyzing the receiving signal strength and mobility of terminals in GEO satellite and terrestrial networks,a method to estimate times of handover is derived.Then the number of handover signals,handover delay,signal quality and packet loss are used to form a model of handover cost.Based on the model,a handover strategy is proposed to choose different network to handover by different mobile terminals.Simulation results demonstrate that the strategy based on the model reduces handover times and delay in high speed terminal compared with the traditional methods.

关 键 词：多覆盖 信号分布 切换次数估计 切换代价模型 切换判决 

分 类 号：TN915.02[电子电信—通信与信息系统]