Collaborative Research: Robust and Secure Cognitive Radio Networks

认知无线电是一种很有前途的范例，可以显著提高无线频谱的利用率，以支持无线业务的持续指数增长。对认知网络的研究主要集中在感知频谱机会和管理无线电资源，使得主用户的服务质量不受损害。很少有人注意到二次用户的共存，这可能是与不同的认知网络，并寻求在相同的频带操作。这些用户的有效共存对于未来认知网络的成功至关重要，也是本项目的主要目标。此外，认知无线电特别开放的性质对传输数据的安全性和隐私性提出了重要的新问题，以及认知或外部实体之间恶意行为的新机会。该项目在一个整体框架中解决了所有这些问题。共存需要在多个认知次用户之间在时间、频率和空间上有效分配无线电资源，同时尊重主干扰约束。研究人员正在开发这种无线电资源管理方案的理论界限，并设计低开销的分布式算法，这些算法考虑了竞争二级服务提供商的激励以及认知环境中所需的更强的安全和隐私措施。信息理论的物理层安全技术正在被用来开发可证明安全的范例，为次要的认知用户和博弈论模型正在适应研究这些网络的鲁棒性，各种干扰攻击和其他恶意行为。

Cognitive radio is a promising paradigm for dramatically increasing the utilization of wireless spectrum to support the continuing exponential growth in wireless traffic. Research on cognitive networks has mainly focused on sensing of spectrum opportunities and managing radio resources such that the primary users' quality of service is not compromised. Much less attention has been paid to the coexistence of secondary users, which may be associated with different cognitive networks and seek to operate in the same frequency bands. Effective coexistence of such users is essential for the success of future cognitive networks, and is the main objective of this project. In addition, the particularly open nature of cognitive radio raises significant new issues for the security and privacy of the transmitted data, as well as new opportunities for malicious behavior among cognitive or outside entities. The project addresses all of these issues in a holistic framework.Coexistence requires effective allocation of radio resources in time, frequency, and space among multiple cognitive secondary users, while respecting primary interference constraints. The investigators are developing theoretical bounds for such radio resource management schemes and designing low-overhead distributed algorithms, which account for the incentives of competing secondary service providers as well as the stronger security and privacy measures needed in a cognitive environment. Information-theoretic physical-layer security techniques are being utilized to develop provably secure paradigms for secondary cognitive users and game-theoretic models are being adapted to study the robustness of these networks to various jamming attacks and other malicious behavior.