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）允许未使用的持牌频带以机会/动态的方式供未持牌（辅助）网络使用，但须在持牌用户返回时腾出这些频带。DSA允许未经许可的用户共享频率，但这种模式不能很好地防止干扰。这提出了二级网络之间自我共存的严峻挑战，以及恶意CR设备/网络通过各种非传统频谱攻击造成破坏的风险。该项目研究对抗条件下CR网络的自我共存挑战，并研究基于博弈论、行为适应、随机学习和网络取证的跨学科方法，这些方法有助于这些网络的生存能力。为了评估这些机制的有效性，在CR原型试验台上实现了这些机制。本项目的智力价值在于：1)构建行为框架，研究频谱冲突的演化动力学；2)系统地理解恶意cr利用频谱敏捷性的最细粒度的独特阴影破坏性质；3)开发一套针对认知破坏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。该项目致力于紧密整合研究和教育计划，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，从研究成果和K-12外展中获得反馈。研究成果将通过出版物、研讨会和教程传播。

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.