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。两种最常见和广泛使用的宽带无线接入网络是蜂窝网络和 Wi-Fi，它们传统上在截然不同的频谱监管领域中运行：蜂窝网络在许可频谱上允许独占使用，而 Wi-Fi 则专为没有许可的频段而设计。通过规则进行干扰保护。这种差异导致了根本不同的系统架构：蜂窝系统是集中控制的，其中用户被分配频率和/或时间资源，以最小化小区内和小区间干扰。另一方面，Wi-Fi 被设计为在必须容忍相似和不同系统之间干扰的环境中运行。最近，人们越来越有兴趣在目前主要由 Wi-Fi 使用的非授权频段中部署最初用于授权蜂窝频段的系统，并进行最小的更改。这创造了一种新的、很大程度上尚未充分探索的异构干扰场景：调度系统（蜂窝）与冲突避免协议（Wi-Fi）共存。目前，行业参与者已经提出了多种共存解决方案，通常反映了现有的既得利益以及促进一方或另一方的选择性用例和测试场景。对这些不同的解决方案进行公正的研究对于解决这个问题上正在进行的争论是必要的，并且可以对正在考虑的大范围频谱的使用产生至关重要的影响。在这个项目中，将研究不同系统之间的这一基本共存问题。通过分析、模拟和实验，以公正的方式进行。该研究将有三个主要目标和一个并行实验计划，该计划侧重于系统级仿真，并辅以硬件测试台。在制定公平共享方案之前，需要对公平的概念进行适当的定义。这将是第一个重点，其中通话时间、吞吐量和访问是要评估的公平性指标。第二个和第三个重点将提出、分析、模拟和测试蜂窝系统可以部署的共存方案，以确保与 Wi-Fi 的公平共享，以及 Wi-Fi 可以部署以确保与蜂窝的公平共享。后一个研究领域是必要的，因为在免许可频谱中，只要 Wi-Fi 都遵守联邦通信委员会的规则，Wi-Fi 并不比其他系统具有任何优先权。实验软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，并用于影响非授权频段共存的标准化和法规。