Power Control Scheme for Underlay Approach in Cognitive Radio Networks

In this paper, a conflict-graph based power control scheme for spectrum underlay in cognitive radio networks is proposed, which helps avoiding the interference and saving power when the primary and secondary users share the same channel simultaneously. Simulations results using the OMNet++ simulator are provided, showing the effectiveness of the proposed approach in terms of number of users in the network, interference imposed by the secondary users on the primary users, Signal to Interference plus Noise Ratio (SINR), and power saving.