Modelling and Analysis of Spectrum Handoff Schemes

Bisma Bashir, Tajinder Pal Singh

Abstract


Cognitive radio is an intelligent technique which is used to improve spectrum utilization. Radio frequency becomes very valuable due to the increase in the number of mobile devices and different types of wireless services. Each wireless service has its own spectrum in which the user operates. However, some of the wireless services have a wide spectrum with not many users as could be accommodated. The bandwidth becomes very expensive due to the shortage of frequency. Spectrum efficiency through cognitive radio (CR) is achieved via four main functions; spectrum sensing, spectrum decision, spectrum sharing, and spectrum mobility. In this thesis we focus on spectrum mobility which is called as SPECTRUM HANDOFF which is a procedure that’s initiated when the primary users (PUs) appear to occupy its licensed band that was being utilized by the secondary users (SUs) during its idle time and enables the SUs to have an efficient and less delayed mode of communication.

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DOI: https://doi.org/10.23956/ijarcsse.v8i10.894

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