CTMC Based Spectrum Sharing Scheme for Cognitive Radio Networks

The radio spectrum is a scarce natural resource. The study report shows that the licensed bands are underutilized. Cognitive radio technology is an emerging technology for the efficient use of radio spectrum. Spectrum sharing is the important function in spectrum management in cognitive radio network. In this paper a spectrum sharing scheme is proposed, in which there are two primary users and multiple secondary users who share frequency spectrum with the primary users. A continuous time Markov chain (CTMC) analysis model is presented to derive the statistics of the proposed scheme. Numeric experiments are presented to examine impacts of various parameters on the derived statistics of the proposed scheme.