A terminal‐controlled vertical handover decision scheme in IEEE 802.21‐enabled heterogeneous wireless networks
A terminal‐controlled vertical handover decision scheme in IEEE 802.21‐enabled heterogeneous wireless networks
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DOI：
10.1002/dac.996
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发表时间：
2009-07
影响因子：
2.1
通讯作者：
Jung-Shyr Wu;Shun-Fang Yang;B. Hwang
中科院分区：
文献类型：
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作者：
Jung-Shyr Wu;Shun-Fang Yang;B. Hwang
异构网络之间的无缝互联对于随时随地提供具有服务质量（QoS）规定的“始终在线”连接服务具有极大的需求。无线保真（Wi-Fi）和无线城域网（WiMAX）网络的集成可以将它们的最佳功能联合收割机结合起来，提供无处不在的接入，同时弥补两种网络的弱点。虽然获得优化的基于切换决策的动态QoS信息具有挑战性，但用户可以通过在配备有多个无线电接口的单个设备中使用终端控制的切换决策来改善其感知的QoS。IEEE 802.21旨在提供定义支持跨异构网络的无缝切换的媒体无关切换（MIH）机制的框架。本文提出了一种基于多属性决策的终端控制垂直切换决策方案，该方案在Wi-Fi和WiMAX融合网络中使用MIH业务提供“永远在线”的连接QoS服务。仿真结果表明，与基于RSS和基于代价函数的垂直切换方案相比，该方案具有更短的切换时间和更低的丢包率.版权所有© 2009约翰威利父子有限公司。
The seamless internetworking among heterogeneous networks is in great demand to provide ‘always‐on’ connectivity services with quality of service (QoS) provision, anywhere at anytime. The integration of wireless‐fidelity (Wi‐Fi) and wireless metropolitan area networks (WiMAX) networks can combine their best features to provide ubiquitous access, while mediating the weakness of both networks. While it is challenging to obtain optimized handover decision‐based dynamic QoS information, users can improve their perceived QoS by using the terminal‐controlled handover decision in a single device equipped with multiple radio interfaces. The IEEE 802.21 aims at providing a framework that defines media‐independent handover (MIH) mechanism that supports seamless handover across heterogeneous networks. In this paper, an multiple attributes decision making‐based terminal‐controlled vertical handover decision scheme using MIH services is proposed in the integrated Wi‐Fi and WiMAX networks to provide ‘always‐on’ connectivity QoS services. The simulation results show that the proposed scheme provides smaller handover times and lower dropping rate than the RSS‐based and cost function‐based vertical handover schemes. Copyright © 2009 John Wiley & Sons, Ltd.