Performance Analysis of Hybrid MAC Protocol for Cognitive Radio Networks

Nasir Faruk, Mohammed I. Gumel, Abdulkarim A. Oloyode, Adeseko A. Ayeni

Bayero University, Kano, Nigeria.
Departement of Electronics, University of York, York, UK.
Department of Telecommunication Science, University of Ilorin, Ilorin, Nigeria.

DOI: 10.4236/ijcns.2013.61003                

Abstract

The rapid growth in demand for broadband wireless services coupled with the recent developmental work on wireless communications technology and the static allocation of the spectrum have led to the artificial scarcity of the radio spectrum. The traditional command and control model (Static allocation) of spectrum allocation policy allows for severe spectrum underutilization. Spectrum allocated to TV operators can potentially be shared by wireless data services, either when the primary service is switched off or by exploiting spatial reuse opportunities. This paper describes a hybrid access scheme based on CSMA/CA and TDMA MAC protocols for use in the TV bands. The approach allows secondary users (SU) to operate in the presence of the primary users (PU) and the OPNET simulation and modelling software has been used to model the performance of the scheme. An analysis of the results shows that, the proposed schemes protect the primary user from harmful Interference from the secondary user. In terms of delay, it was found that packet arrival rates, data rates and the number of secondary users have significant effects on delay.

Keywords

Dynamic Spectrum Access (DSA); Optimized Network Engineering Tool (OPNET); TV White Space; Cognitive Radio Networks; Signal-To-Interference Ratio (SIR); Hybrid MAC

Conflicts of Interest

The authors declare no conflicts of interest.

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