CISE PostDOC: Experimental Research on Wireless ATM Network

9805538休斯，赫尔曼D. 密歇根州立大学 CISE Postdoc：无线ATM网络实验研究 本研究的重点是调查扩展的异步传输模式（ATM）信令协议，以支持在混合网络环境中的连接切换。提出了一种分层切换方案，以支持无线和有线ATM网络集成的连接切换。这种切换方案结合了分簇、增量连接重建和虚拟分层网络技术，提供快速有效的连接重路由。在这个方案中包括一个特殊的机制，重新路由未交付和错误路由的细胞到他们的目的地，这反过来又减少了由于连接切换信元丢失。正在考虑的切换过程中使用两种方法进行评估。首先，要进行的分析提出了理论性能，确定指标，如连接中断时间，缓冲区的要求，信元丢失率。第二，实验（通过无线设备和仿真）进行使用高速网络和性能（HSNP）实验室ATM测试床。 这项研究是有意义的，因为它涉及到无线ATM网络的关键互操作性问题。博士后研究助理将在这方面发挥关键作用 项目，包括实验部分。

9805538 Hughes, Herman D. Michigan State University CISE Postdoc: Experimental Research on Wireless ATM Network This research focuses on investigating extensions of the Asynchronous Transfer Mode (ATM) signaling protocol to support connection hand-offs in a hybrid network environment. A hierarchical hand-off scheme is developed to support connection hand-offs for the integration of the wireless and wireline ATM networks. This hand-off scheme combines the clustering, the incremental connection re-establishment, and the virtual hierarchical network techniques to provide fast and efficient connection re-routings. A special mechanism is included in this scheme to reroute undelivered and mis-routed cells to their destination, which in turn reduces cell loss due to connection hand-offs. The hand-off procedure under consideration is evaluated by using two approaches. First, an analysis to be conducted presents the theoretical performance, determining metrics such as connection disruption time, buffer requirement, and cell loss rate. Second, experiments (via wireless devices and emulations) are to be conducted by using the High Speed Networking and Performance (HSNP) Laboratory ATM testbed. This research is significant because it deals with key interoperability issues relating to wireless ATM networks. The Postdoctoral Research Associate will play a pivotal role in all aspects of this project, including the experimental portion.