CAREER: Survivability and Selfcoexistence in the Battle of Cognitive Radio Network Societies

基于认知无线电(CR)的动态频谱接入(DSA)允许未使用的授权频段被非授权(次级)网络以机会主义/动态的方式使用，条件是这些网络在授权用户返回时将腾出。DSA允许未经许可的用户共享频率，但该模式不能提供良好的干扰保护。这带来了二级网络之间自我共存的严重挑战，以及恶意CR设备/网络通过各种非传统频谱攻击中断的风险。该项目研究了认知无线电网络在对抗条件下的自我共存挑战，并研究了基于博弈论、行为适应、随机学习和网络取证的跨学科方法，以帮助这些网络的生存性。为了评估这些机制的有效性，我们在CR原型试验台上实现了这些机制。该项目的智力价值在于：1)构建研究频谱冲突演化动力学的行为框架，2)利用频谱敏捷性的最细粒度，系统地了解恶意CRS独特的影子干扰性质，3)开发一套针对认知中断的生存机制，并探索其有效性。该项目对无线技术/政策有更广泛的影响，预计将有助于未来认知无线电的高效和安全设计。该项目致力于将研究和教育计划紧密结合在一起，围绕学生指导、研究生/本科生课程改进和基于实践项目的学习、从研究结果获得反馈和K-12扩展。研究成果将通过出版物、研讨会和教程进行传播。

Dynamic spectrum access (DSA) based on cognitive radio (CR) allows unused licensed bands to be used by unlicensed (secondary) networks in an opportunistic/dynamic manner under the provision that they would vacate upon the return of the licensed users. DSA allows unlicensed users to share frequencies, but the paradigm does not provide good protection from interference. This raises serious challenge of self-coexistence among the secondary networks as well as risks of disruption from malicious CR devices/networks through various non-traditional spectrum attacks. This project studies the self-coexistence challenges of CR networks under adversarial conditions and investigates inter-disciplinary methodologies based on game theory, behavioral adaptation, stochastic learning and network forensics that aid survivability of these networks. To assess effectiveness, the mechanisms are implemented on CR prototype testbed. The intellectual merit of this project lies in: 1) constructing behavioral frameworks studying the evolutionary dynamics of spectrum conflict, 2) systematically understanding the unique shadow-disruptive nature of the malicious CRs exploiting the finest granularity of spectrum agility, and 3) developing a suite of survival mechanisms against cognitive disruptions and exploring their effectiveness. The project has broader impact on wireless technologies/policies and is expected to help in the efficient and secure design of future cognitive radios. This project is committed to tightly integrate research and educational plans which revolve around student mentoring, graduate/undergraduate curriculum enhancement and hands-on project based learning taking feedback from research findings and K-12 outreach. Research results will be disseminated through publications, seminars, and tutorials.