CAREER: A Theoretical Foundation for Supporting Delay-Sensitive Applications on Wireless Networks

新兴的无线网络被设想同时支持延迟容忍和延迟敏感的应用。不幸的是，由于(I)不可靠和资源受限的无线信道，以及(Ii)跨多个协议层的固有的复杂交互，在无线网络中提供延迟保证一直是一个具有挑战性的问题。该职业项目的目标是提供一套先进的理论工具、算法和协议，用于支持无线网络上的延迟敏感型应用。通过将大偏差和Lyapunov稳定性相结合，本项目首次提出了一种新的统一理论来表征高级MAC/PHY机制的时延性能。然后将其集成到针对延迟敏感型应用的统一跨层控制和优化框架中，从而产生用于MAC调度、高级速率自适应、准入控制、多路径路由和基于定价的控制的高性能算法和协议。最后，在重点应用领域之一的车载网络中，该项目开发了量身定制的分析工具和控制算法，以满足高速公路安全应用的独特实时需求。研究成果将为支持延迟敏感应用的无线网络提供新颖的分析技术和实用的控制协议，从而对无线行业产生广泛影响。通过无线系统和应用中心，PI将积极与行业合作伙伴分享成果。这项研究紧密地融入了普渡大学的本科生和研究生课程。特别是，成立了一个垂直整合的项目团队，让本科生参与研究。该项目还将通过改善高速公路安全和拯救人类生命来造福我们的社会。

Emerging wireless networks are envisioned to simultaneously support both delay-tolerant and delay-sensitive applications. Unfortunately, providing delay guarantees in wireless networks has been a challenging problem due to (i) the unreliable and resource-constrained wireless channel, and (ii) the inherent complex interactions across multiple protocol layers. The goal of this CAREER project is to provide an advanced suite of theoretical tools, algorithms, and protocols for supporting delay-sensitive applications on wireless networks. By combining large-deviation with Lyapunov stability, this project first develops a new unified theory for characterizing the delay performance of advanced MAC/PHY mechanisms. This is then integrated into a unified cross-layer control and optimization framework for delay-sensitive applications, which leads to high-performance algorithms and protocols for MAC scheduling, advanced rate adaptation, admission control, multi-path routing, and pricing-based control. Finally, in one of the focused application areas, vehicular networks, the project develops tailored analytical tools and control algorithms to address the unique real-time requirements of highway safety applications.Research results will have a broad impact on the wireless industry by providing novel analytical techniques and practical control protocols for wireless networks supporting delay-sensitive applications. Through the Center for Wireless Systems and Applications, the PI will actively share the results with industrial collaborators. The research is tightly integrated into the undergraduate and graduate curricula at Purdue. In particular, a vertically integrated Project team is formed to involve undergraduate students in research. The project will also benefit our society by improving highway safety and saving human lives.