标题: | 在WiMAX/WiFi 异质网路上跨层媒介独立换手机制 A Cross-Layering Media-Independent Handover Mechanism in Heterogeneous WiMAX/WiFi Networks |
作者: | 黄月慧 Huang, Yue-Huei 陈耀宗 Chen, Yaw-Chung 资讯科学与工程研究所 |
关键字: | WiMAX;WiFi;MIH;异质性换手;WiMAX;WiFi;MIH;Heterogeneous handover |
公开日期: | 2008 |
摘要: | 无线技术普及在最近几年,共存多种无线技术是一个研究议题。在发展未来无线通讯系统过程有一重要的挑战是在跨不同的无线存取技术时,提供使用者一个无缝隙的服务,并且透过单一行动装置去维持服务品质。然而,当行动节点跨不同网路移动时,多样化的设计会导致服务品质下降。对于下一世代网路来说,整合异质性网路将是一个重要议题。在一个无线存取网路换到另一个无线存取网路时,由于降低整个换手时间以及服务中断时间,来支持无缝隙移动并且确保进行中的连结不会被中断。 在这篇论文中,我们为了实行整合IEEE 802.11无线区域网路和IEEE 802.16无线都会区域网路,使用一个由IEEE所发展的新标准。IEEE 802.21也叫做媒介独立换手 (MIH),提供一个架构来帮助同质性换手以及异质性换手。首先,我们描述在IEEE 802.21换手程序,并且与其他文献上提出之方法比较。再来是,我们说明我们所提出的方法运用FMIPv6,换手在异质性网路上,并且对于不同的方法进行数学分析。最后,我们在NS2模拟器上,模拟以及比较我们的方法和其它已提出的方案。 Wireless technologies have been popularized these recent years and it is a research issue to the coexistence and seamless service across multiple wireless technologies. The main challenge in the development of future wireless communication systems is to provide users with a wide range of services across different radio access technologies through a single mobile node, while maintaining the quality of service requirements. However, design varieties can lead to service degradation as the mobile node move across different systems. The integration of heterogeneous networks will be a trend for next generation networks. For supporting seamless mobility and ensuring the ongoing session not to be disrupted from one access network to another, it is necessary to reduce total handover time and service disruption time. In this thesis, we try to integrate IEEE 802.11 WLANs and IEEE 802.16 WMANs, using the new standard developed by IEEE standard group. IEEE 802.21 is also called Media Independent Handover (MIH) which provides a framework for facilitating homogeneous handover and heterogeneous handover. First, we describe handover procedure of IEEE 802.21 and compare it with the completed method from the literature. Second, we discuss our proposed scheme using FMIPv6 to handover across networks and use mathematical analysis for different schemes. Last, we perform experiment on the NS2 simulator and compare it with the other existed methods from the literatures. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT079655622 http://hdl.handle.net/11536/43429 |
显示于类别: | Thesis |
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