Utility-Based Power Control for Cognitive Radio Networks: Monotonic Optimization Approach
Tran Quang Khai Nguyen, Choong Seon Hong · 2012
Because of the properties of cognitive radio networks (CRNs), which coexist with primary network, power control problem is very important. In this paper, we propose a power control algorithm for cognitive radio networks (CRNs) that maximizes total utility of secondary users (SUs). Primary users (PUs) need to be protected from interference of secondary users. We use interference temperature constraints that keep interference under a threshold to protect primary users (PUs). Utility functions of SUs can be any increasing functions. We formulate our power control problem as a monotonic optimization that can be solved in centralization to achieve global optimum.