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基于业务的新型动态权重设定网络选择算法
发表时间：2009-06-30 浏览量：2005 下载量：911
| 全部作者： | 朱丽凤，崔鸿雁，严强君 |
| 作者单位： | 北京邮电大学信息与通信工程学院 |
| 摘 要： | 在未来多种接入网络并存的无线通信环境中，针对现有的切换判决方案不能同时兼顾用户需求与网络状况、切换代价函数中的指标单一等问题，从业务角度出发，提出了一种新的基于动态权重设定的主客观相结合的网络选择算法(network selection algorithm based on dynamic weight)。算法兼顾到切换中网络选择的用户偏好、当前网络状况和不同类业务的需求因素，采用基于可能度的不确定多属性判决法（uncertainly multi-attribute decision making, UMADM），遵循优先选择最适合的网络（always suitable connected, ASC)原则以实现整个无线网络资源的有效利用。仿真结果分析表明：算法能提高重叠异构网络环境下业务运行的整体QoS性能，提高选择网络的性价比。� |
| 关 键 词： | 通信技术；动态权重；层次分析法；变异系数；基于可能度的不确定多属性判决；最合适连接 |
| Title： | A novel service-based dynamic weight setting network �selection algorithm |
| Author： | ZHU Lifeng， CUI Hongyan， YAN Qiangjun |
| Organization： | Telecommunications Institute of Information and Communication Engineering, �Beijing University of Posts and Telecommunications |
| Abstract： | In the future mobile systems, various wireless access technologies will exist simultaneously and constitute a complicated heterogeneous network environment. Considering the services, a novel network selection algorithm based on dynamic weight setting is proposed in order to solve the existing problems that there is not a tradeoff among users’ preference and network conditions, and only considers single handoff parameter in the present handoff decision schemes. A possibility-based method is used for handoff cost function. Network selection adopts principle in order for the efficient wireless source utilization. Simulation results show that the proposed algorithm is favorable to improve the whole QoS performance of services, and enhance the performance-price ratio of the selected networks. |
| Key words： | communication technology; dynamic weight; analytic hierarchy process; coefficient of variation; uncertainly multi-attribute decision making; always suitable connected |
| 发表期数： | 2009年6月第12期 |
| 引用格式： | 朱丽凤，崔鸿雁，严强君. 基于业务的新型动态权重设定网络选择算法[J]. 中国科技论文在线精品论文，2009，2（12）：1295-1299. |
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