CISE PostDOC: Experimental Research on Wireless ATM Network

9805538休斯，赫尔曼D.密歇根州立大学cise博士后：无线ATM网络的实验研究这项研究的重点是研究异步传输模式信令协议的扩展，以支持混合网络环境中的连接切换。为了支持无线和有线ATM网络的融合，提出了一种支持连接切换的分层切换方案。该切换方案结合了分簇、增量连接重建和虚拟分层网络技术，以提供快速高效的连接重路由。在该方案中包括了一种特殊的机制来将未递送和错误路由的信元重新路由到它们的目的地，这进而减少了由于连接切换而造成的信元丢失。使用两种方法对正在审议的移交程序进行评估。首先，要进行的分析提供了理论性能，确定了连接中断时间、缓冲区要求和信元丢失率等指标。其次，实验(通过无线设备和模拟)将使用高速网络和性能(HSNP)实验室ATM试验台进行。这项研究具有重要意义，因为它涉及与无线ATM网络相关的关键互操作性问题。博士后研究助理将在该项目的所有方面发挥关键作用，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.