Increasing energy efficiency with channel condition based activation for a cognitive radio mobile network

Abstract

Cognitive radio is an uprising technique designed to solve the problem of spectrum utilization effectively. In a cooperative cognitive radio mobile network (CRMN), battery-powered cognitive mobile node (CMN) frequently sense and report primary user's (PU's) existence to exploit a spectrum hole. The energy consumption increases when all CMN sense and report to centralized controller (CC) in order to make a final global decision. An appropriate strategy is needed to be developed in order to decrease the overall energy consumption, improving energy efficiency (EE). This paper proposes communication channel based activation (CCBA) for CMN in a CRMN. Numerical results shows that even with CCBA limiting some CMN to be activated, helps in increasing EE and global probability of false alarm (FA/W) for the CRMN.