异构无线网络中融合SA的改进垂直切换算法  被引量:2

An Improved Vertical Handoff Algorithm Based on SA for Heterogeneous Wireless Networks

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作  者:刘帅[1] 赵康[1] 张少辉[2] 

机构地区:[1]商丘职业技术学院汽车建筑工程系,河南商丘476100 [2]周口师范学院网络工程学院,河南周口466001

出  处:《控制工程》2017年第8期1713-1717,共5页Control Engineering of China

基  金:河南省科技厅软科学研究计划项目(142400411213);河南省高等学校重点科研项目(15A520118);河南省教育厅科技重点项目(14B520014)

摘  要:为保证业务的连续性,移动节点在异构无线网络间需要进行无缝垂直切换,针对现有基于服务质量(QoS)切换算法的搜索精度低、计算时间长且不能处理大量QoS参数等缺陷,提出一种融合模拟退火(SA)算法的改进型权重组合快速搜索(SEFI)算法:SA-SEFI。首先,根据具体应用,利用SEFI获得多个QoS参数权重组合的较优解,然后利用SA算法获取最优解,最后根据最优参数权重组合计算每个网络QoS参数的适应度来决定切换策略。实验结果表明,SA-SEFI能够精确的搜索最优解、计算量小且能够处理多达6个QoS参数。To ensure business continuity, the mobile node needs to switch seamlessly in heterogeneous wireless networks, for the issues that the existing handoff algorithm based on quality of service (QoS) has low search precision and long calculation, and can not deal with a large number of QoS parameters, an improved weight combination fast search (SEFI) algorithm using simulated annealing (SA) algorithm (SA-SEFI) is proposed. First, the SEFI is used to solve the multiple QoS parameter combination weights to obtain the better solutions according to the specific application. Then, the SA algorithm is used to obtain the optimal solution. Finally, the adaptation of each network QoS parameter is calculated according to the optimal parameter combination weights, and to decide the switching strategy. Experimental results show that SA-SEFI can accurately search the optimal solution, has small computation and can handle up to 6 QoS parameters.

关 键 词:异构无线网络 垂直切换 QOS参数 模拟退火算法 快速搜索算法 

分 类 号:TP393[自动化与计算机技术—计算机应用技术]

 

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