一种智能ABC支持型QoS切换决策机制

摘要

In this paper, a QoS (quality of service) handover decision scheme with ABC (always best connected) supported is proposed. With knowledge of fuzzy mathematics and microeconomics introduced, application types, QoS requirements, access networks and terminals are described. With application QoS requirements, costs user willing to pay, user preferences to access network coding schemes, user preferences to access network providers, terminal velocities, terminal battery capacities and access network conditions considered comprehensively, an optimal handover solution of assigning N terminals to M access networks is found based on niche PSO (Particle Swarm Optimization) algorithm. With the help of gaming analysis,Pareto optimum under Nash equilibrium of user utility and network provider utility is achieved or approached for the found solution. Simulation results showed that the proposed scheme was effective.%本文提出了一种总最佳连接ABC(Always Best Connected)支持型服务质量QoS(Quality of Service)切换决策机制,引入模糊数学和微观经济学等相关知识,刻画应用类型、QoS需求、接入网络和移动终端,综合考虑应用QoS需求、用户愿付费用、用户对接入网络编码制式偏好、用户对接入网络供应商偏好、终端当前运动速度、终端当前剩余电量和接入网络状况等因素,通过博弈分析,基于小生境粒子群优化算法,寻找把N个终端分配到M个接入网络的最佳切换决策方案,使用户和网络提供方效用达到或接近Nash均衡下的Pareto最优.仿真结果表明,该机制是有效的.