一种基于多属性决策理论的改进垂直切换算法

An improved vertical handoff algorithm based on multiple attribute decision making

提出一种基于多属性决策理论的垂直切换算法,并对异构无线网络的4类典型业务进行了仿真研究.该算法利用层次分析法设计双层层次结构,通过主客观权重相结合解决分配权重时过于主观的问题,同时结合利用逼近理想解法来解决网络排序异常的问题.仿真结果表明该算法能够自适应用户终端设备的移动速度,在保证4类典型业务的Qo S同时减少乒乓效应.

In this paper we propose an vertical handoff algorithm based on multiple attributes decision making theory,and simulatie the four types of typical business of heterogeneous wireless network. The proposed algorithm use AHP to design two layers of structure, through the combination of subjective and objective weights in order to solving the problem about weights assigned too subjective. Then the proposed algorithm combines with TOPSIS to solve the problem when making decision only by a single TOPSIS, which may result in networks abnormal rank. The simulation results show that the improved algorithm can be adaptively fit the speed of user terminal. In the premise of guarantee QoS of four types of typical business,at the same time reduce the ping-pang effect.