NeTS: Small: Collaborative Research: Can LTE & WiFi Live Happily Ever After?

NeTS：小型：协作研究：可以 LTE

• 批准号: 1618920
• 负责人: Sumit Roy
• 金额: $ 20.3万
• 依托单位: University of Chicago
• 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: 2016-10-01 至 2020-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1618920&HistoricalAwards=false
• 关键词: NeTS; Small; Collaborative; Research; LTE

There is a pressing need for more efficient use of existing spectrum to sustain the explosive growth in wireless data. The two most common and widely used broadband wireless access networks are cellular and Wi-Fi which traditionally have operated in very different spectrum regulatory domains: cellular over licensed spectrum allowing exclusive use whereas Wi-Fi has been designed for the unlicensed bands where there is no interference protection by rule. This difference has led to fundamentally different system architectures: cellular systems are centrally controlled where users are allocated resources in frequency and/or time in a way so as to minimize intra-cell and inter-cell interference. Wi-Fi on the other hand, has been designed to operate in an environment where interference between like and unlike systems must be tolerated. Of late, there has been increasing interest in deploying systems originally intended for licensed, cellular bands in the unlicensed bands that are currently primarily used by Wi-Fi, with minimal changes. This creates a new and largely under-explored heterogeneous interference scenario: a scheduled system (cellular) coexisting with a collision avoidance protocol (Wi-Fi). Currently, multiple coexistence solutions have been proposed by industry players, often reflecting existing vested interests and selective use-cases and test scenarios that promote one side or the other. An unbiased study of these various solutions is necessary to settle the ongoing debate on this issue, and can have vital impact on the usage of a large swath of spectrum under consideration.In this project, this fundamental coexistence problem between dissimilar systems will be studied in an unbiased manner, using analysis, simulation and experiments. The research will have three main thrusts and a parallel experimental plan that focuses on system level simulation complemented by a hardware test-bed. Prior to developing schemes for fair sharing, the very concept of fairness needs to be defined suitably. This will be the focus of the first thrust where air-time, throughput and access are the fairness metrics that will be evaluated. The second and third thrusts will propose, analyze, simulate and test coexistence schemes that cellular systems can deploy to ensure fair sharing with Wi-Fi, and that Wi-Fi can deploy to ensure fair sharing with cellular. The latter research area is necessary since in the unlicensed spectrum Wi-Fi does not have any priority over other systems as long as both obey the the Federal Communications Commission rules. The experimental software and hardware platforms will be used to test the coexistence schemes developed in the project. The results of the project, including software code and data sets, will be made public on an ongoing basis and also be used to influence standardization and regulations governing coexistence in the unlicensed bands.

迫切需要更有效地利用现有频谱来维持无线数据的爆炸性增长。两个最常用且使用广泛的宽带无线访问网络是蜂窝和Wi-Fi，传统上在非常不同的频谱调节域操作：允许独家使用的蜂窝频谱，而Wi-Fi则是针对无限制的频段设计的，而无限制地没有干扰。这种差异导致了根本不同的系统体系结构：蜂窝系统受到集中控制，其中用户以某种方式分配了频率和/或时间的资源，以最大程度地减少细胞内和细胞间的干扰。另一方面，Wi-Fi旨在在必须耐受性和不同系统之间的干扰环境中进行操作。最近，人们对最初针对未经许可频段中的许可的细胞频段部署系统的兴趣越来越大，这些系统目前主要由Wi-Fi使用，而变化很小。这创建了一种新的且在很大程度上探索的异质干扰方案：与碰撞避免协议（WI-FI）共存的计划系统（蜂窝）。目前，行业参与者提出了多种共存解决方案，通常反映了现有的既得利益和选择性用例以及促进一方或另一方的测试场景。对这些各种解决方案的无偏研究是必要的，以解决有关此问题的持续辩论，并且可能会使用分析，仿真和实验来研究这个项目之间的大量频谱的使用至关重要。这项研究将具有三个主要推力和平行的实验计划，该计划的重点是由硬件测试床补充的系统级仿真。在制定公平共享计划之前，需要适当地定义公平的概念。这将是第一个推力的重点，即播放时间，吞吐量和访问是将要评估的公平指标。第二和第三个推力将提出，分析，模拟和测试共存方案，即蜂窝系统可以部署以确保与Wi-Fi的公平共享，并且Wi-Fi可以部署以确保与蜂窝的公平共享。后者的研究领域是必要的，因为在未经许可的频谱中，Wi-Fi只要遵守联邦通信委员会规定，Wi-Fi就没有其他系统优先级。实验软件和硬件平台将用于测试项目中开发的共存方案。该项目的结果（包括软件代码和数据集）将持续公开，还用于影响无牌频段共存的标准化和法规。