CNS: NETS: SMALL: Collaborative research: Collision: Friend or Foe?

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。传统上，无线网络中传输数据包的碰撞被视为一种障碍。然而，如果数据包中包含的信息即使在数据包碰撞后也能被恢复，那么在无线系统中可以获得显着更高的传输速率。该项目正在开发一种新颖的网络友好方法来解决冲突。通过复杂的信号处理和与物理层技术相结合的更高层资源分配方案，从碰撞包中提取相关信息。信号处理技术通过利用碰撞中存在的分集源（如小用户延迟和载波频率偏移）来恢复相关信息。更高层的资源分配技术通过利用物理层的冲突解决能力，使端到端信息传递的吞吐量最大化，延迟最小化。这项研究将导致无线系统性能的巨大飞跃，从而促进大量先进应用，如通过无线网络进行高质量多媒体传输，救援和恢复操作等。研究结果将通过以下方式传播：(i)在主要期刊和会议上发表学术论文，并通过万维网提供；（ii）与无线行业和非营利组织直接互动，这将有助于设计可在日常生活中有效使用的无线系统。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Traditionally collisions of transmitted packets in wireless networks have been treated as a hindrance. If however the information contained in the packets is recovered even after the packets collide, significantly higher transmission rates can be attained in wireless systems. The project is developing a novel network-friendly approach for resolving collisions. The relevant information is being extracted from collided packets through sophisticated signal processing and higher layer resource allocation schemes that function in conjunction with the physical layer techniques. The signal processing techniques recover the relevant information by exploiting source of diversity that are present in a collision, such as small user delays and carrier frequency offsets. The higher layer resource allocation techniques maximize the throughput and minimize the delay in end-to-end delivery of information through the exploitation of collision resolution capabilities at the physical layer. This research will lead to a quantum leap in performance of wireless systems which will in turn facilitate a plethora of advanced applications such as high quality multimedia transmission over wireless networks, rescue and recovery operations, etc. Results will be disseminated through (i) publications of scholarly papers in premier journals and conferences and available through the world-wide-web, and (ii) direct interactions with wireless industry and non-profit organizations which will facilitate the design of wireless systems that can be effectively used in daily lives.