NeTS: Small: Toward High-Performance WLANs: Bridging the Physical Layer Divide

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。本项目通过了解物理层属性对性能的影响，并将其纳入下一代wlan的设计和控制，构建高性能无线局域网（wlan）。本研究由三个部分组成。第一部分开发了空间分集模型，这是主要的物理层特征，有助于理解和预测基础设施模式wlan的性能。第二部分将空间多样性与跨层协议分析相结合，允许评估物理层属性对低层和高层协议的影响。第三部分研究新的网络控制，利用空间多样性提供的机会，帮助减轻，在某些情况下，超越其有害的性能影响，包括不公平和吞吐量下降。控制维度扩展到覆盖城市街区和校园的大规模无线局域网，注入了复杂的空间耦合。该项目采用模拟、实验和分析相结合的方法来实现其目标。该项目更广泛的影响在于缩小无线和有线网络之间的性能差距，从而促进无处不在的高速互联网接入。该项目还有助于教育学生无线通信的基础知识和复杂性。该项目的成果将在会议、研讨会上传播，并通过公开提供数据和工具的项目网站传播。

This award is funded under the American Recovery and Reinvestment Actof 2009 (Public Law 111-5). This project architects high-performance wireless local area networks (WLANs) by understanding the impact of physical layer attributes on performance and incorporating them in the design and control of next generation WLANs. The research is comprised of three parts. The first part develops models of spatial diversity, the dominant physical layer feature, that help understand and predict the performance of infrastructure mode WLANs. The second part integrates spatial diversity with cross-layer protocol analysis that allows evaluation of the influence of physical layer attributes on both lower- and higher-layer protocols. The third part investigates new network controls that harness opportunities provided by spatial diversity that help mitigate, and in some cases, transcend their detrimental performance effect including unfairness and throughput degradation. The control dimension extends to large-scale WLANs covering city blocks and campuses that inject complex spatial coupling. The project employs a combination of simulation, experimentation, and analysis to achieve its goals. The broader impact of this project lies in narrowing the performance gap between wireless and wired networks, which facilitates ubiquitous high-speed Internet access. The project also helps educate students in the fundamentals and intricacies of wireless communication. The results from the project will be disseminated at conferences, seminars, and through the project web site where data and tools are made publicly available.