CAREER: Cross Layer Resource Allocation in Wireless Networks

在通信网络中，分层一直是一个基本的体系结构原则。然而，最近人们对探索各种技术产生了浓厚的兴趣，这些技术允许跨传统层边界的更强耦合，特别是在无线网络中的物理层和更高的网络层之间。在物理层，在许多情况下，信息理论给出的基本性能权衡是很容易理解的。当更高层次的目标，如延迟，进入画面时，基本的理解就会少得多。本研究旨在解决无线网络跨层资源分配中的几个关键问题。在这些问题中，物理层“无线电资源”随时间和用户之间动态分配，以同时满足网络层和物理层的性能要求。利用信息论和通信论的思想对物理通信通道进行建模。采用排队理论模型来考虑网络级服务质量问题。这项工作的重点是提高对这些设置中的基本体系结构权衡和基本性能限制的理解。

Layering has long been a basic architectural principal in communication networks. Recently, however, there has been much interest in exploring various techniques that allow for a stronger coupling across traditional layer boundaries, in particular between the physical layer and higher network layers in wireless networks. At the physical layer, the fundamental performance trade-offs as given by information theory are, in many cases, well understood. When higher layer objectives, such as delay, enter the picture, there is much less fundamental understanding.This research is addressing several key problems in cross-layer resource allocation in wireless networks. In these problems, physical layer "radio resources" are dynamically allocated over time and between users in order to satisfy both network layer and physical layer performance requirements. Ideas from information theory and communication theory are used for modeling the physical communication channels. Queueing theoretic models are used for incorporating network-level quality of service issues. The emphasis of this effort is to improve understanding of the basic architectural trade-offs and fundamental performance limitations in these settings.