Radio Resource Management in Cognitive Radio Networks

认知无线电是一个新的概念，它的引入是为了解决无线通信中的频谱稀缺问题，允许非授权用户共享授权频谱。对于基于认知无线电的无线网络来说，提供高效的频谱利用率和稳定的服务是至关重要的，也是技术上的挑战。建议的研究将在考虑硬件、频谱移动性、多跳传输和无线信道的实际限制的情况下，通过在许可用户和非许可用户之间实现动态频谱分配来解决这一问题。特别是，拟议的研究将开发(I)分布式资源分配算法，以改善频谱利用率和服务提供质量；(Ii)稳健的资源管理机制，以对抗潜在的频谱感知错误；(Iii)分布式呼叫接纳控制方法，以保证新的和现有的呼叫的服务质量；(Iv)用于分组和呼叫级别的容量分析的数学模型；以及(V)有效的频谱切换方法，以在未经许可的用户之间平滑和无缝地传播信息。 该研究将有助于加快认知无线电技术在无线通信中的商业化应用。它将开发新的网络协议和控制算法，对于在未经许可的用户之间实现连接至关重要，即使在没有基础设施的动态网络拓扑中也是如此。前沿研究将在认知无线电领域产生新的想法和知识，并使新产品的开发成为可能，这将为加拿大信息和通信技术行业在国际市场上培养至关重要的竞争优势。 这项提议将为加拿大用户带来重大好处，例如新的无线通信服务和应用、安全和节能的设备以及全球互联网接入。

Cognitive radio is a new concept, which is introduced to solve the spectrum scarcity issue in wireless communications by allowing the share of licensed spectrum with unlicensed users. For cognitive radio based wireless networks, the provisioning of both efficient spectrum utilization and stable services is critical and technically challenging. The proposed research will address this issue through achieving dynamic spectrum allocation between licensed and unlicensed users under the consideration of practical limitations on hardware, spectrum mobility, multihop transmission, and wireless channels. In particular, the proposed research will develop (i) distributed resource allocation algorithms for improved spectrum utilization and quality of service provisioning; (ii) robust resource management mechanisms to combat the potential spectrum sensing errors; (iii) distributed call admission control methods to guarantee the quality of service satisfaction to both new and existing calls; (iv) mathematical models for capacity analysis at both packet and call levels; and (v) effective spectrum handoff methods for smooth and seamless information dissemination among unlicensed users. The research will help to accelerate the commercial applications of the cognitive radio technology in wireless communications. It will develop new networking protocols and control algorithms critical for implementing connections among unlicensed users, even in a dynamic network topology without infrastructure. The cutting-edge research will generate new ideas and knowledge in cognitive radio and enable the development of new products, which will foster a vital competitive edge for Canadian Information and Communication Technology industry in the international market place. The proposal will result in significant benefits to Canadian users, such as new wireless communication services and applications, safe and energy efficient equipments, and global Internet access.