STUDY OF ENERGY EFFICIENT SENSOR NETWORK USING AD-HOC COGNITIVE RADIOS

Abhinav Lall, O. P. Singh, G. R. Mishra, Ashish Dixit

Abstract: An Energy Efficient network is proposed that consists of Ad-Hoc (mobile) Cognitive Radios (CR’s) and infrastructure wireless sensor nodes. Sensor nodes within communication range of each CR are grouped into a cluster and the clusters of cognitive radios are regularly updated according to the random mobility of the cognitive radios. We reduce the energy consumption and end-to-end delay of the network by dividing by each cluster in disjoint subsets with overlapped sensing coverage of primary user (PU) activity. Respective subsets of CR provide target detection and false alarm probability. Substantial energy efficient is achieved by activating only one subset of the cluster, while putting rest of the subsets in the clusters into sleep mode. Additional gain in energy efficient is achieved by two promising propositions: Selecting nodes from the active subsets to sleep mode by scheduling. The sensor nodes for Real Time Spectrum sensing are chosen considering their respective time durations for sensing. We compare the proposed CR networks with existing approaches to demonstrate the network performance in terms of the energy consumption and the end-to-end delay.

Keywords: Cognitive Radios, Ad-Hoc CR Network, Sensor Network

DOI: https://doi.org/10.15623/ijret.2016.0518004