Abstract
Conference Title: 2013 International Conference on Computing, Management and Telecommunications (ComManTel) Conference Start Date: 2013, Jan. 21 Conference End Date: 2013, Jan. 24 Conference Location: Ho Chi Minh City Cognitive radio networks (CRNs) significantly improve spectrum utilization efficiency by allowing secondary users (SUs) to opportunistically share unused spectrum bands with primary users (PUs). In this paper, we present a spectrum assignment model and propose a genetic algorithm (GA) and a heuristic algorithm to determine the proper spectrum assignment, which optimizes the SUs' reward and the network operator's revenue while satisfying capacity constraints, interference constraints and rate requirement constraints. We show that both algorithms greatly outperform the random assignment approach.