Date Added: Nov 2012
By enabling opportunistic Secondary Users' (SUs) usage of licensed spectrum, Cognitive Radio (CR) technology notably improves spectrum utilization. However, the fundamental multicast throughput optimization problem in Cognitive Radio Networks (CRNs) is still under-explored. Considering spectrum availability and sharing fairness, in this paper, the authors propose a cross-layer approach to maximize the multicast throughput in multi-hop CRNs. They introduce a new service provider, called Secondary Service Provider (SSP), to harvest the available spectrum and allocate the collected bands among SUs. The SSP also guides the transmissions of multicast CR sessions w.r.t. their contention and spectrum sharing fairness.