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A Seamless Vertical Handover Approach

机译:无缝的垂直切换方法

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摘要

Today, wireless network devices are equipped with multiple access technologies like UMTS and Wireless LAN. The handover between the technologies has been widely studied in literature. Several of these research papers build their handover mechanisms on top of existing protocols like Mobile IP. These protocols operate on the network layer and recognize link layer changes only by timeouts. Consequently, if no cross layer approach is implemented, a seamless vertical handover between Wireless LAN and UMTS cannot be provided.rnIn this paper, we introduce a vertical handover protocol based on a tightly-coupled network architecture. With this architecture, it is possible to perform the handover on the link layer and thus, reducing the handover delays. The protocol is implemented in a simulation environment and the results reveal that a seamless vertical handover can be performed with blackout times of only a few milliseconds.
机译:如今,无线网络设备配备了多种访问技术,例如UMTS和无线LAN。技术之间的切换已经在文献中进行了广泛的研究。这些研究论文中有几篇是在现有协议(例如Mobile IP)的基础上构建其切换机制的。这些协议在网络层上运行,并且仅通过超时来识别链路层更改。因此,如果不实施跨层方法,则无法提供无线局域网和UMTS之间的无缝垂直切换。在本文中,我们介绍了一种基于紧密耦合网络体系结构的垂直切换协议。利用这种架构,可以在链路层上执行切换,从而减少切换延迟。该协议是在仿真环境中实现的,结果表明,可以在仅几毫秒的中断时间内执行无缝的垂直切换。

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