多目标遗传优化ABC支持型切换决策机制

张成博;王兴伟;黄敏

【期刊名称】《计算机科学与探索》

【年(卷),期】2013(007)008

【摘要】In heterogeneous wireless networks,handoff decision schemes need to consider plenty of factors,such as quality of service (QoS) requirements,service costs,user preferences,mobile terminal conditions and access network conditions,and make users and network providers reach win-win situations.This paper characterizes the factors which influence handoff decisions with the knowledge of fuzzy mathematics and microeconomics.On this basis,this paper proposes an always best connected (ABC) supported handoff decision scheme with multi-objective genetic optimization,which improves the decisions quality with the help of elitist selection and individual migration.Based on game analysis,this paper finds an optimal handoff solution of assigning multiple terminals to multiple access networks to make user utilities and network provider utilities achieve or approach Pareto optimum under Nash equilibrium.Simulation results show that this scheme is feasible and effective and has better performance than certain existing schemes.%异构无线网络中的切换决策机制,需要综合考虑应用服务质量(quality of service,QoS)需求、服务费用、用户偏好、移动终端状态和接入网络状态等多维因素,进而实现用户和网络提供商的双赢.引入模糊数学和微观经济学知识,对