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 consump- tion, 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.