Dynamic Spectrum Access for Delay-sensitive Multimedia Applications in Cognitive Radio

This paper investigates the channel selection strategy for secondary users’ delay-sensitive multimedia applications over cognitive radio networks with heterogeneous channel capacity. We claim that in order to avoid the costly collision due to the miss-detection and false alarm of primary users, a secondary user may desire an optimal policy which maximizes its reward. In case of explicit model of the channel statistics, Markov decision process (MDP) is applied to derive the optimal channel selection strategy.