摘要
异构无线网络技术的发展、智能移动终端的普及、用户无线业务的快速增长以及QoS需求的个性化给网络接入选择带来巨大挑战。基于多属性决策理论和模糊逻辑理论,提出了一种新的面向用户多业务QoS需求的网络接入选择算法,其步骤主要包括选择预评估、构造关键参数量化决策矩阵、层次分析参数权重、确定理想方案、综合网络评估、网络选择。实验数据表明,本算法能够准确进行网络接入触发选择,减少乒乓效应,在移动终端速度和网络负载的变化情况下,能有效地进行网络选择,很好地解决了呼叫掉线和负载不均衡的问题。
With the advance in heterogeneous wireless networks and smart mobile terminals,user’s wireless services become more and more common.The challenge is the network selection based on QoS requirement.Based on multiattribute decision making theory and fuzzy logic,a normalization algorithm for network selection in heterogeneous wireless network was presented.It includes six main steps：network pre-selection,constructing normalized decision-making matrix,calculating analytical hierarchy weights,determining the positive-ideal and negative-ideal solution,network evaluation and network selection.Experimental results show that the proposed algorithm can trigger the handoff precisely and reduce the ping-pong effect.Moreover,when the mobile station’s speed and network’s load are changed,the system can select the network effectively and solve the problem of call dropping and load balancing.
出处
《计算机科学》
CSCD
北大核心
2015年第3期55-59,共5页
Computer Science
基金
北京市自然科学基金重大项目(4110001)
北京市教育委员会科技发展计划项目(KM201010005011)资助
关键词
异构无线网络
接入选择
服务质量
Heterogeneous wireless network
Network selection
QoS
