AN ENERGY EFFICIENT SPECTRUM SENSING, ACCESS AND HANDOFF CONCEPT USING LOOK UP TABLE FOR COGNITIVE RADIOS NETWORKS

Abstract

Spectrum scarcity is an major issue in latest wireless technologies used now a days. Literature shows 70% of spectrum is either underutilized or not utilized at all. The main process in determination of spectrum scarcity starts with Spectrum sensing in cognitive radio. We are using Look up Table (LUT) which hold the status of the current spectrum which is updated after every time slot (sensing and transmission process). Sensing should be reliable, fast and robust. This paper mainly focused on spectrum sensing, access and handoff using LUT based fuzzy switch to improve transmission time and avoid traffic congestion hence improve throughput keeping Cognitive radios system more energy efficient. We have achieved Energy consumption vs throughput coefficient significantly improved by 5-8%, Energy consumption vs delay coefficient significantly decreased by 5-15% with respect to existing methods.