Impact of the primary user on the secondary user blocking probability in cognitive radio sensor networks

Abstract

With the increasing usage of wireless sensor network technologies, their unlicensed bands become overcrowded.To address this challenge, cognitive radio technology with the dynamic spectrum access policy has merged with WirelessSensor Network to overcome spectrum underutilization. The Cognitive Radio Sensor Network (CRSN) has emerged asa promising solution to overcome spectrum scarcity in a resource-constrained wireless sensor network. In CRSN, TCPhas to cope with a new type of packet loss due to the primary users (PU) arrival, known here as a secondary user (SU)blocking loss. In this paper SU blocking loss is modelled by a discrete-time Markov chain. The experimental results areverified using the NS2.