ITR: Collaborative Research: Achieving Innovative and Reliable Services in Unlicensed Spectrum

摘要 免许可通信频段的建立成功地鼓励了创新，最近在使用免许可频谱提供互联网连接的无线设备和基础设施方面。互联网使用的一个关键方面是几乎无限的增长能力。对于免许可无线，从 11 Mb/s 802.11b 到 54 Mb/s 802.11a 的过渡标志着行业向更高数据速率竞赛的开始。由于过度使用和未能开发有效共享资源的机制，不断增加的数据速率和设备的激增很容易导致未经许可频谱的使用效率低下。虽然任何有限频段的过载可能是不可避免的，但该项目正在尽可能地解决可用未授权频段容量的增加问题，并正在开发能够预测过载并防止突然、意外故障模式的方法。这个多学科项目将工程和技术视角与监管、产权和经济协调文献中的见解相结合，寻求有效利用未授权频谱。该团队包括在产权、网络公平以及无线通信和网络工程方面拥有专业知识的研究人员。该团队正在通过研究以下问题来开发一个理解非授权频段无线网络合作的通用框架：应用于频谱管理的产权技术中立无线设备之间的协作协议有效和公平共享拥塞非授权频谱的定价机制无线电级干扰避免技术正在结合形式和概念分析、模拟和实验方法来研究上述问题，包括实现潜在协作协议和合作模型的动态频谱管理测试台。其主旨是保留未经许可乐队的“创造性混乱”，同时创造一定程度的长期稳定性和可预测性，以适应所进行的投资规模以及这些用途对国家的战略重要性。该项目的结果对于政策制定者和新兴的非授权频段无线互联网提供商以及无线技术专家都很有价值。

ABSTRACTThe establishment of unlicensed communication bands has successfully encouraged innovation, most recently in wireless devices and infrastructure that use unlicensed spectrum to provide connections to the Internet. A key aspect of Internet usage is an almost unlimited capacity for growth. For unlicensed wireless, the transition from 11 Mb/s 802.11b to 54 Mb/s 802.11a marks the start of an industry race toward ever-higher data rates. The combination of increasing data rates and a proliferation of devices could easily lead to inefficiency in the use of unlicensed spectrum due to a combination of overuse and failure to develop mechanisms for efficient sharing of this resource. While the overload of any finite band may be inevitable, this project is addressing the increase in capacity of the available unlicensed bands as much as possible, and is developing approaches that can predict overloads and prevent sudden, unexpected failure modes.This multi-disciplinary project seeks efficient use of unlicensed spectrum by combining an engineering and technology perspective with insights from the literatures on regulation, property rights, and economic coordination. The team includes researchers with expertise in property rights, networking fairness, and wireless communications and network engineering. This team is developing a general framework for understanding cooperation in unlicensed band wireless networks by studying the following issues:Property rights as applied to spectrum managementProtocols for collaboration between technology neutral wireless devicesPricing mechanisms for efficient and fair sharing of congested unlicensed spectrumRadio-level interference avoidance techniquesThe above problems are being studied with a combination of formal and conceptual analysis, simulation and experimental methods, including a dynamic spectrum management testbed which implements potential collaboration protocols and cooperation models. The thrust is to preserve the "creative chaos" of the unlicensed bands while creating a degree of long term stability and predictability that is appropriate to the size of the investments being made and the strategic importance of these uses to the nation. Results from the project are of value to both policy makers and emerging unlicensed band wireless Internet providers as well as wireless technologists.