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

机会频谱接入（OSA）是认知无线电技术的核心，其重点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协议存在确定性的缺点，无法防止恶意干扰者破坏合法通信。认知干扰器总是能够利用公共可用信道统计信息有效地干扰空闲信道，并导致严重的频谱利用率不足。该项目通过多道防御方法解决了在认知无线电网络（crn）中建立强大抗干扰通信的挑战。该研究考虑了多种网络环境，并集成了不同维度的防御技术，包括自适应非协调跳频（AUFH）、功率控制和信号处理。这种防御方法可以实现被动和主动保护，从躲避干扰器到与干扰器竞争，再到驱逐干扰信号，从而确保crn中可靠的用户通信。该项目的研究有可能显著推进最先进的技术，并利用拟议的多防线方法开发创新和复杂的防御战略。所提出的解决方案将有助于最终构建健壮可靠的crn，这对未来的通信系统至关重要。该项目还将直接促进课程开发、教学、学生监督和未来安全工程师培训。该项目的主要成果将通过演讲、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.