一种基于代价函数的3G-WLAN垂直切换算法  

A vertical handoff algorithm in 3G-WLAN based on cost function

作　　者：张建伟[1] 李朝阳[2] 郭鹏飞[2] 王玲艳[2] 

机构地区：[1]郑州轻工业学院软件学院,河南郑州450002 [2]郑州轻工业学院计算机与通信工程学院,河南郑州450002

出　　处：《郑州轻工业学院学报（自然科学版）》2011年第6期83-87,共5页Journal of Zhengzhou University of Light Industry:Natural Science

基　　金：国家973重点基础研究发展计划(2007CB307102;2007CB307100);河南省基础与前沿技术研究计划项目(082300410280);郑州轻工业学院博士基金项目(2010BSJJ011)

摘　　要：针对目前切换算法没有综合考虑多种属性,因而容易产生乒乓效应的问题,提出了一种基于代价函数的3G-WLAN垂直切换算法.该算法采用基于代价函数对接入网络进行评估的思想,根据网络的特点,分析网络参数并对参数归一化,使其能够自适应地进行切换判断,实现移动节点自适应的切换判决.实验结果表明,该算法能有效减少不必要的切换,增强异构网络的适应性.To solve the problem that current handoff algorithm is not taken into account a variety of properties and prone to ping-pong effect, an algorithm of 3G-WLAN vertical handoff based on the cost function was proposed.This algorithm adopts for the thought of evaluating access network based on cost functions and according to the features of network to analyze the parameters of network and normalized them,so it can handoff decision adaptively and realize the handoff sentence adaptively to the mobile node.The results showed that the algorithm can effectively decrease unnecessary handoff and improve adaptablity of heterogeneous network.

关 键 词：异构网络 垂直切换 网络参数 代价函数 归一化 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TN929.5[自动化与计算机技术—计算机科学与技术]