NeTS-WN: Opportunistic Bandwidth Sharing Using MIMO: Beyond Time and Frequency

NeTS-WN：使用 MIMO 的机会性带宽共享：超越时间和频率

• 批准号: 0721529
• 负责人: Kang Shin
• 金额: $ 30万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0721529&HistoricalAwards=false
• 关键词: NeTS; WN; Opportunistic; Bandwidth; Sharing

There is an expected shortage in bandwidth resources due to the recent success of, and hence the explosive demand for, wireless services and networks. This expected shortage is not so much due to the scarcity of bandwidth, but due to its inefficient use. There exist plenty of ``opportunities" available along time and frequency dimensions that wireless networks can potentially exploit. It is therefore important to develop a new way of exploiting these opportunities effectively and efficiently. Recent technological advances make it possible to realize SDRs (Software-Defined Radios) or smart radios that, unlike traditional radios, can switch from one frequency to another at minimum cost, thereby enabling ''opportunistic'' spectrum access along time and frequency dimensions. SDRs empower next-generation wireless networks with adaptive and dynamic multi-band access, but introduce several unique cross-layer challenges. On the other hand, the newly-emerging MIMO (Multiple-Input Multiple-Output) technology has great potential for significant throughput enhancements, better interference suppression, and substantial energy savings. SDRs and MIMOs together form a complete means of enabling opportunistic spectrum access along not only time and frequency dimensions (via SDR), but also space dimension (via MIMO). This project will, therefore,1. Model, characterize, and analyze the maximum achievable throughput in MIMO-equipped wireless networks;2. Derive guidelines for network designers to determine the optimal parameters of wireless networks;3. Develop innovative techniques that exploit MIMO to reliably support and maintain QoS in MIMO wireless networks; and4. Implement and evaluate the performance of the developed techniques via simulation and experimentation on a multi-band capable wireless testbed that we are currently building with commercial off-the-shelf components.The intellectual merit of the proposed research will be: (1) establishment of both theoretical and practical foundations for next-generation wireless networks to be built with advanced technological components such as SDRs and MIMO; (2) design guidelines for selecting the optimal parameters of wireless networks equipped with these advanced components; (3) solutions to the bandwidth-shortage problem, which is key to next-generation wireless networks; and (4) innovative techniques enabling next-generation wireless networks to support and maintain QoS of multimedia applications. This research will also make broader impacts on: (1) basic research by providing fundamental solutions to challenging problems to be encountered in future wireless networks; (2) regulatory bodies such as FCC by providing rigorously-proven solutions and guidelines for establishing flexible and efficient spectrum policies; and (3) undergraduate and graduate education via integration of research, teaching, and learning, especially the use of the developed solutions and their implementations on the proposed testbed in students' classes and independent study projects.

由于最近无线服务和网络的成功，以及对无线服务和网络的爆炸性需求，预计带宽资源将出现短缺。这种预期的短缺并不是由于带宽的短缺，而是由于带宽的低效使用。在时间和频率维度上存在着大量可供无线网络利用的“机会”。因此，重要的是开发一种有效和高效地利用这些机会的新方法。最近的技术进步使实现sdr（软件定义无线电）或智能无线电成为可能，与传统无线电不同，它们可以以最低的成本从一个频率切换到另一个频率，从而实现沿时间和频率维度的“机会主义”频谱访问。sdr为下一代无线网络提供了自适应和动态的多频段接入，但也带来了一些独特的跨层挑战。另一方面，新兴的MIMO（多输入多输出）技术在显著提高吞吐量，更好的干扰抑制和大量节能方面具有巨大的潜力。SDR和MIMO共同构成了一种完整的机会频谱接入手段，不仅可以实现时间和频率维度（通过SDR），还可以实现空间维度（通过MIMO）。因此，这个项目将……建模、表征和分析配备mimo的无线网络的最大可实现吞吐量；2 .推导出网络设计者确定无线网络最优参数的准则；开发利用MIMO的创新技术，以可靠地支持和维持MIMO无线网络中的QoS；and4。通过在多频段无线测试平台上的模拟和实验，实现和评估所开发技术的性能，我们目前正在使用商用现货组件构建该测试平台。所提出的研究的智力价值将是：(1)建立理论和实践基础，为下一代无线网络建立先进的技术组件，如sdr和MIMO；(2)配备这些先进元件的无线网络的最佳参数选择的设计准则；(3)解决带宽短缺问题，这是下一代无线网络的关键；(4)使下一代无线网络能够支持和维持多媒体应用的QoS的创新技术。本研究还将在以下方面产生更广泛的影响：(1)基础研究，为未来无线网络中遇到的挑战性问题提供根本性的解决方案；(2) FCC等监管机构，为制定灵活高效的频谱政策提供经过严格验证的解决方案和指导方针；(3)研教结合的本科和研究生教育，特别是在学生课堂和自主学习项目中使用所开发的解决方案及其在拟议测试平台上的实施。