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

迫切需要更有效地使用现有频谱，以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和Wi-Fi，它们传统上在非常不同的频谱监管域中运行：许可频谱上的蜂窝允许独占使用，而Wi-Fi被设计用于未许可频带，其中没有规则的干扰保护。这种差异导致了根本上不同的系统架构：蜂窝系统是集中控制的，其中用户以最小化小区内和小区间干扰的方式被分配频率和/或时间上的资源。另一方面，Wi-Fi被设计为在必须容忍相似和不相似系统之间的干扰的环境中运行。最近，人们越来越有兴趣将最初用于授权蜂窝频带的系统部署在当前主要由Wi-Fi使用的未授权频带中，而变化最小。这就产生了一种新的、在很大程度上未被探索的异构干扰场景：与冲突避免协议（Wi-Fi）共存的调度系统（蜂窝）。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。这些不同的解决方案的公正的研究是必要的，以解决正在进行的辩论就这个问题，并可以有重要的影响，使用一个大的频谱正在考虑中。在这个项目中，这个基本的共存问题之间的不同系统将在一个公正的方式进行研究，使用分析，模拟和实验。该研究将有三个主要的推力和一个并行的实验计划，重点是系统级仿真的硬件测试台的补充。在制定公平分享计划之前，需要适当界定公平的概念。这将是第一个推力的重点，其中空中时间，吞吐量和访问是将被评估的公平性指标。第二和第三个重点将提出，分析，模拟和测试蜂窝系统可以部署以确保与Wi-Fi公平共享的共存方案，以及Wi-Fi可以部署以确保与蜂窝系统公平共享的共存方案。后一个研究领域是必要的，因为在未经许可的频谱中，Wi-Fi不具有优于其他系统的任何优先级，只要两者都遵守联邦通信委员会的规则。实验软件和硬件平台将用于测试项目中开发的共存方案。该项目的成果，包括软件代码和数据集，将持续公开，并用于影响规范未授权频段共存的标准化和法规。

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.