一种SAE异构网络中的预测辅助切换判决算法  

Handoff decision algorithm based on prediction in SAE network

作　　者：杨森[1] 汤红波[1] 柏溢[1] 

机构地区：[1]国家数字交换系统工程技术研究中心,郑州450002

出　　处：《计算机应用研究》2010年第8期3104-3106,3109,共4页Application Research of Computers

基　　金：国家科技重大专项课题"全IP宽带移动网络关键技术"(2009ZX03004-002)

摘　　要：针对3GPPR8中基于SAE(system architecture evolution,系统演进架构)的全IP异构网络,提出一种预测辅助的切换判决算法。以往的算法没有考虑移动终端高速运动时对切换效果的不利影响,在此算法中首先提出了一种最大速度的预判决方法,然后根据信号接收强度的历史信息,合理运用卡尔曼滤波预测算法对下一抽样时刻作出快速、准确预测,使移动节点可以对切换触发时机作出准确判断。仿真结果表明该算法提高了切换中的整体性能,并有利于系统运行效率的提升。Accoording to the all-IP mobility network based on the system architecture evolution（ SAE） in 3GPP Release 8,visioned the next generation wireless network as a heterogeneous wireless access networks. This paper proposed a handoff decision algorithm assisted by the prediction. The previous algorithms had not cosidered the negative effect caused by the terminal’ s high speed. So proposed a pre-decision method by using the max-velocity. And applyed the Kalman prediction method combined with the forward signal strength to pedicted the next time’s strength accuracy. The mobile terminal can trigger the handoff appropriately. Simulaton results of the algorithm show that it provides a highly performance of the handoff,and it is benefit for the communcation system efficiency’s improvement.

关 键 词：切换判决 预测 异构网络 接收信号强度 

分 类 号：TN929.5[电子电信—通信与信息系统]