NeTS: Small: Collaborative Research: Fine-Grained Spectrum Access for Carrier-Aggregation Based Wireless Networks

NeTS：小型：协作研究：基于载波聚合的无线网络的细粒度频谱接入

• 批准号: 1617321
• 负责人: Xinyu Zhang
• 金额: $ 17.5万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2020-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1617321&HistoricalAwards=false
• 关键词: NeTS; Small; Collaborative; Research; Fine

Dynamic spectrum access brings great benefits for users in overcrowded radio spectrum to opportunistically harvest spectrum resources, which is especially useful for high date rate applications such as video conferencing and multimedia streaming. Since available spectrum may be fragmented, carrier aggregation becomes a critical enabling technique. Many recent and emerging protocols (e.g., 802.11ac WiFi, 802.11af TV whitespace networks, 3GPP LTE unlicensed, and 802.11ay millimeter-wave networks) have been incorporating carrier aggregation mechanisms. However, these mechanisms are still preliminary and heavily rely on conventional MAC/PHY which is designed for nodes sharing the same contiguous channel. As carrier aggregation networks evolve to new generations, three inherent problems will become the fundamental barrier to their efficiency, fairness, and scalability: (i) a transmitter is unable to sense medium state during transmission, (ii) more users and high spectrum dynamics worsen the medium access contention, and (iii) the need of fast spectrum agreement to aggregate multiple fragmented spectrum chunks. The objective of this research is to explore general primitives to effectively realize carrier aggregation with three research components: (i) Migrate the spectrum sensing paradigm from "detect and then transmit" to "simultaneously transmit and detect". The end goal is to overcome the efficiency and fairness problems in standard spectrum sensing mechanisms to enable asynchronous, out-of-band OFDM spectrum sensing and multi-antenna based full-duplex sensing. (ii) Address the contention issue in wideband fragmented spectrum sharing with low collision probabilities and low overhead. A spectrum arbitration mechanism is proposed, enabled by a parallel bitwise signaling scheme and a novel compound packet preamble design. (iii) Design a light-weight in-band mechanism that achieves fast synchronization and spectrum agreement, so as to overcome the substantial control channel overhead for spectrum agreement under high spectrum dynamics. The success of the proposed research will enhance radio spectrum sharing, and inspire standardization bodies to incorporate the proposed new protocol primitives for much higher performance. A continuous effort will be made to integrate the proposed research to education program, to mentor undergraduate researchers, and recruit women and minority students.

动态频谱访问为人满为患的无线电频谱中的用户带来了巨大的好处，从而有机会收获频谱资源，这对于诸如视频会议和多媒体流媒体等高约会率应用程序尤其有用。由于可用的光谱可能是分散的，因此载体聚集成为一种关键的启用技术。许多最近和新兴方案（例如802.11ac WiFi，802.11AF电视Whitespace网络，3GPP LTE未经许可和802.11日毫米波网络）已结合了运营商聚集机制。但是，这些机制仍然是初步的，并且在很大程度上依赖于常规的MAC/PHY，该MAC/PHY旨在共享相同连续通道的节点。随着运营商聚集网络发展到新一代，三个固有的问题将成为其效率，公平性和可扩展性的基本障碍：（i）发射器在传输过程中无法感知中等状态，（ii）更多的用户和高频谱动态使中等访问权限变得更加恶化，并且（iii）（iii）快速杂货的多型杂货不好的景点。这项研究的目的是探索一般原始物，以有效地实现载体聚集，并通过三个研究组成部分：（i）将频谱传感范式从“检测到然后传输”到“同时传输和检测”。最终目标是克服标准频谱传感机制中的效率和公平问题，以使异步，外部OFDM频谱传感和基于多ANTENNA的全双链传感。 （ii）以低碰撞概率和低空费用的宽带分散的频谱共享中解决争议问题。提出了频谱仲裁机制，通过平行的位信号方案和新颖的复合数据包前序设计启用。 （iii）设计一种实现快速同步和频谱一致性的轻型内部机制，以克服高光谱动力学下的频谱一致性的实质控制通道开销。拟议的研究的成功将增强无线电频谱共享，并激发标准化机构，以纳入提出的新协议基础，以提高性能。将不断努力将拟议的研究纳入教育计划，指导本科研究人员，并招募妇女和少数族裔学生。