CIF: Small: Fundamental Limits of Layered Wireless Networks

CIF：小：分层无线网络的基本限制

• 批准号: 1017436
• 负责人: Natasha Devroye
• 金额: $ 49.9万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2015-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1017436&HistoricalAwards=false
• 关键词: CIF; Small; Fundamental; Limits; Layered

The goal of the research is to determine the fundamental, information theoretic limits of when and how to layer multiple wireless networks on shared and/or unlicensed bands in a seamless and spectrally efficient manner.Wireless networks are everywhere: WiFi, Bluetooth, cordless phones populate increasingly dense unlicensed frequency bands. Cellular, satellite, military and first-responder networks occupy exclusively licensed bands that are gradually giving way to dynamic, secondary spectrum sharing forms of licensing. For both types of licensing, it is crucial that multiple wireless networks co-exist in the same finite spectral resources in an intelligent, efficient and scalable manner.The time is ripe for a fresh look at how to optimally layer wireless networks, reaching far-beyond today's ``interference-limited'' solutions which combine orthogonal access and the treatment of interference as noise. The research moves away from classical information theoretic single-layer, homogeneous networks to include realistic oblivion constraints on how different layers should interact in a hierarchical fashion. Understanding how to best layer networks constitutes a major step towards eliminating current spectral inefficiencies. The fundamental bounds on the performance of layered networks developed will reveal when incentives for networks to adopt a layered policy exist, which is expected to significantly impact the design of future networks.Both distributed and centralized layered networks are investigated, with goals to:1) develop a structured framework for layered networks, 2) derive capacity regions for deterministic layered networks and associated Gaussian layered networks to within a constant gap, 3) understand layered networks through asymptotic metrics by considering the generalized degrees of freedom of the layered network, the throughput scaling laws with number of nodes in each layer, and the throughput scaling law with number of layers.

该研究的目标是确定何时以及如何以无缝和频谱高效的方式在共享和/或未授权频段上分层多个无线网络的基本信息理论限制。无线网络无处不在：WiFi、蓝牙、无绳电话占据越来越密集的未授权频段。蜂窝、卫星、军事和第一响应者网络占用专门许可的频段，这些频段正逐渐让位于动态的二级频谱共享许可形式。 对于这两种类型的许可，关键是多个无线网络以智能、高效和可扩展的方式共存于相同的有限频谱资源中。重新审视如何优化无线网络分层的时机已经成熟，远远超出了当今的“干扰限制”解决方案，该解决方案结合了联合收割机正交接入和将干扰视为噪声的处理。 该研究远离经典的信息论单层，同质网络，包括现实的遗忘约束，不同的层应该如何以分层的方式进行交互。 了解如何最好地分层网络是消除当前频谱效率低下的重要一步。 分层网络性能的基本界限将揭示何时存在网络采用分层策略的激励，这预计将对未来网络的设计产生重大影响。分布式和集中式分层网络都进行了研究，目标是：1）开发分层网络的结构化框架，2）导出确定性分层网络和相关联的高斯分层网络的容量区域，使其处于恒定间隙内，3）通过考虑分层网络的广义自由度、吞吐量与每层节点数的比例关系以及吞吐量与层数的比例关系，通过渐近度量来理解分层网络。