A New Dimension in Radio Spectrum Sharing through Network Cooperation

现有的频谱共享范例在主要网络和次要网络之间设置了明确的边界。主要网络和次要网络之间的节点级合作非常有限。该项目开发了一种新的大胆范例，探索基于策略的网络合作，将其作为主要网络和次要网络之间频谱共享的新维度。这种模式的好处很多，因为它允许集成来自两个网络的资源。为了将这一新范式从概念转化为现实，该项目旨在(1)通过数学模型和优化来发展对基于策略的合作的基本理解，(2)通过使用先进的物理层技术来探索新的可实现的速率区域，以及(3)开发能够提供接近理论极限的性能的分布式优化算法。在原型方面，该项目在一个48节点的试验台上实现了基于政策的合作。该项目研究了一种新的范式和技术，使无线电频谱能够更灵活和高效地共享。这项研究开发的新数学模型将有助于从根本上理解新范式的好处。先进物理层技术的使用将进一步推动可实现速率区域的性能范围。新的教科书将在弗吉尼亚理工大学和其他大学的课堂上开发和使用。计划通过正在进行的NSF REU认知无线电通信网站和弗吉尼亚理工大学参与由国家妇女和信息技术中心组织的项目Peesetters，特别努力扩大女性和代表性不足学生的参与。

Existing spectrum-sharing paradigms have set clear boundaries between primary and secondary networks. There is very limited node-level cooperation between primary and secondary networks. This project develops a new and bold paradigm that explores policy-based network cooperation as a new dimension for spectrum sharing between primary and secondary networks. The benefits of this paradigm are numerous, as it allows integrating resources from two networks. To move this new paradigm from concept to reality, this project aims to (1) develop fundamental understanding of policy-based cooperation through mathematical models and optimization, (2) explore new achievable rate regions through the use of advanced physical layer technologies, and (3) develop distributed optimization algorithms that can offer performance approaching the theoretical limits. For prototype, the project implements the policy-based cooperation on a 48-node testbed.The project investigates a new paradigm and technologies that enable more flexible and efficient sharing of the radio spectrum. New mathematical models developed in this research will help gain fundamental understanding of the benefits of the new paradigm. The use of advanced physical layer technologies will further push the performance envelopes of achievable rate regions. New textbooks will be developed and used in classrooms at Virginia Tech and other universities. Special efforts to broadening participation by female and underrepresented students are planned through an on-going NSF REU site for cognitive radio communications and Virginia Tech's participation in Pacesetters, a program organized by the National Center for Women and Information Technology.