一种新的无线异构网络的自适应垂直切换算法  

A new adaptive vertical handoff algorithm of wireless heterogeneous network

作　　者：张丽丽[1] 刘大鹏[1] 杨帆[1] 徐昌庆[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《信息技术》2011年第6期4-7,共4页Information Technology

基　　金：国家自然科学基金项目(61071079);科技部"863"计划资助项目(2007AA01Z224)

摘　　要：针对当前无线异构网络融合技术中的垂直切换机制,提出了一种以平均接收信号强度为评价指标,并由此指标判断可能的运动趋势的自适应垂直切换算法。仿真结果表明:相比于传统的固定门限的平均接收信号强度垂直切换算法,提出的方法能较好地预测并提前触发该发生的切换,改善切换性能。For the vertical handoff mechanism of the current wireless heterogeneous network convergence technology, this paper provides an adaptive vertical handoff algorithm which uses the received signal strength （RSS） as the evaluating indicator and changes the detection threshold by the variation tendency of the RSS. Compared to the traditional average RSS handoff algorithm with fixed threshold, the simulation result shows the proposed algorithm can predict and trigger the handoff switch in advance to improve the handoff performance.

关 键 词：无线异构网络 垂直切换 3G网络 

分 类 号：TN925[电子电信—通信与信息系统]