摘要： 现有垂直切换算法的切换判决指标大多为网络侧参数,较少考虑用户业务对网络的实际需求。为此,以业务为切换单元,提出一种基于模糊层次分析法的切换判决算法。通过分析影响业务的参数因子,采用模糊层次分析法为不同业务选取最优网络进行切换。仿真结果显示,该算法能够及时合理地做出切换判决,保障业务QoS需求,提高切换判决的稳定性,减少错误切换次数,降低网络阻塞率,提高用户的通信满足度。

关键词: 业务需求, 服务质量, 模糊逻辑, 模糊层次, 垂直切换

Abstract: Most vertical handoff algorithms do not think about the actual demands of network and the mobility of user,but take network properties as the standards of judgment．In order to solve the above problems,the switching decision algorithm based on Fuzzy Analytic Hierarchy Process(FAHP) is proposed.By analyzing the influencing factors of business,ituses FAHP for different business to select the optimal network to switch.Simulation results show that the algorithm is able to make the switching decision more reasonably,can ensure the Quality of Service(QoS)of application requirements,improve the stability of the switching decision,reduce the error switching times and the network blocking probability,and improve the communication satisfaction of users.

Key words: business requirement, Quality of Service(QoS), fuzzy logic, fuzzy hierarchy, vertical handoff

中图分类号: 

• TP393