Efficient Resource Allocation Schemes for Cognitive Radio Networks: Agile Spectrum Sharing and Enabling Technologies
Source de subvention
Natural Sciences and Engineering Research Council of Canada (NSERC) – Discovery Grant
Professeur(e)s impliqués
Résumé
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 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 focuses on developing original and innovative efficient resource allocation schemes for the integration of CR technology in emerging wireless networking techniques. First, we 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. Second, we study the integration of dynamic spectrum access into femtocell cellular systems. Femtocell benefits can be significantly curtailed without efficient resource allocation, spectrum access and interference control schemes.
