Efficient resource allocation schemes for cognitive radio networks: agile spectrum sharing and enabling technologies

认知无线电网络的高效资源分配方案：敏捷频谱共享和支持技术

• 批准号: 327646-2011
• 负责人: Ajib, Wessam
• 金额: $ 2.04万
• 依托单位: Université du Québec à Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=549159
• 关键词: Efficient; resource; allocation; schemes; cognitive

In recent years, wireless applications have become increasingly crucial while the number of wireless users has constantly been growing. However, the radio spectrum is a scarce natural resource; and its majority is allocated to well-identified licensed users. In general, licensed users are unwilling to share their spectrum with other unknown users and a large part of the licensed spectrum is not fully utilised. Cognitive Radio (CR) technology (based on software defined radio) presents a practical approach to spectrum scarcity and to its underutilisation. This is achieved by implementing the concept of dynamic spectrum access such that unlicensed CR users can dynamically access the licensed spectrum, without causing harmful interference to licensed users. This research program focuses on developing original and innovative efficient resource allocation schemes for the integration of CR technology in emerging wireless networking techniques. First, we will investigate CR nodes operating with cooperative communication - that builds a virtual multi-antenna system by making use of the antennas available in the neighbour nodes. This integration creates a cognitive cooperative system where efficient resource allocation algorithms are critical for extracting the benefits of both the cognition and the cooperation. Second, we will study the integration of dynamic spectrum access into femtocell cellular systems. Femtocell systems provide a high-throughput high-mobility service to answer the more-challenging requirements of new wireless applications. Each femtocell contains one low-power low-cost high-throughput base station connected to the wide cellular network through a reliable high speed connection. Femtocell benefits can be significantly curtailed without efficient resource allocation, spectrum access and interference control schemes.

近年来，随着无线用户数量一直在增长，无线应用程序变得越来越重要。但是，无线电频谱是一种稀缺的自然资源。它的大多数分配给了认可的有执照用户。通常，有执照的用户不愿与其他未知用户共享其频谱，并且很大一部分许可频谱尚未完全利用。认知无线电（CR）技术（基于软件定义的无线电）提出了一种实用的频谱稀缺方法及其不足的方法。这是通过实现动态频谱访问的概念来实现的，以便无执照的CR用户可以动态访问许可频谱，而不会造成对许可用户的有害干扰。该研究计划着重于开发原始和创新的有效资源分配方案，以集成新兴的无线网络技术中CR技术。首先，我们将调查使用合作通信运行的CR节点 - 该节点通过利用邻居节点中的天线来构建虚拟的多Antenna系统。这种集成创建了一个认知合作系统，在该系统中，有效的资源分配算法对于提取认知和合作的好处至关重要。其次，我们将研究动态频谱访问到fomtocell细胞系统中的整合。 Femtocell系统提供了高通量的高机动性服务，以回答新无线应用程序的挑战性要求。每个Femtocell都包含一个通过可靠的高速连接连接到宽蜂窝网络的低功率高成本高通量基站。无需有效的资源分配，频谱访问和干扰控制方案，可以大大减少fomtocell福利。