Efficient Spectrum Sharing and Power Control in Cognitive Radio Networks

Cognitive radio technology solves the spectrum under utilization problem by enabling the secondary users access the spectrum holes opportunistically. In this paper, the authors are interested in how to share the spectrum holes among the secondary users, with the objective of maximizing the total spectrum utilization. They present a cross-layer design including spectrum sharing and power control. Spectrum sharing determines which neighbor a node will communicate with and which channel this communication will take place; power control decides which power level a node will use. They propose a Binary Integer Linear Programming (BILP) formulation, and use LINGO to find the optimal solution.