NeTS: Small: Collaborative Research: Enabling Robust Communication in Cognitive Radio Networks with Multiple Lines of Defense

认知频谱接入（OSA）是认知无线电技术的核心，其核心是提高频谱利用效率和可靠性。尽管有这些好处，但现有的OSA协议受到其确定性的影响，无法防止恶意干扰者破坏合法通信。认知干扰机可以利用公共信道统计信息对空闲信道进行有效干扰，造成严重的频谱利用率不足。该项目解决了通过多道防线方法在认知无线电网络（CRN）中建立鲁棒抗干扰通信的挑战。该研究考虑了各种网络环境，并从不同维度集成了防御技术，包括自适应非协调跳频（AUFH），功率控制和信号处理。防御方法实现了反应性和主动性保护，从躲避干扰到与干扰竞争，以及驱逐干扰信号，从而确保CRN中的鲁棒用户通信。该项目的研究有可能显着推进最先进的技术，并使用所提出的多道防线方法开发创新和复杂的防御策略。所提出的解决方案将有助于最终建立对未来通信系统至关重要的鲁棒和可靠的CRN。该项目还将直接有助于课程开发，教学，学生监督和未来的安全工程师培训。该项目的主要成果将通过专题介绍、出版物以及教程和软件包形式的在线材料传播。

Opportunistic spectrum access (OSA) is at the core of the cognitive radio technologies with the focus on improving spectrum utilization efficiency and reliability. Despite the benefits, existing OSA protocols suffer from their deterministic nature and cannot prevent an ill-intended jammer from disrupting legitimate communications. A cognitive jammer can always effectively jam the idle channels by exploiting public-available channel statistics and causes serious spectrum underutilization. This project addresses the challenge of establishing robust anti-jamming communication in cognitive radio networks (CRNs) through a multiple-line of defense approach. The research considers a variety of network environments and integrates defense technologies from different dimensions, including adaptive uncoordinated frequency hopping (AUFH), power control, and signal processing. The defense approach enables both reactive and proactive protections, from evading jammers to competing against jammers, and to expelling jamming signals, and thus ensures robust user communications in CRNs. The research in this project has a potential to significantly advance the state-of-the-art and develop innovative and sophisticated defense strategies using the proposed multiple lines of defense approach. The proposed solutions will contribute towards eventually building robust and dependable CRNs that are critical to the future communication systems. The project will also contribute directly to the curriculum development, teaching, student supervising and future security engineer training. Major results of this project will be disseminated through presentations, publications, as well as online materials in the forms of tutorials and software packages.