Performance Evaluation of Secondary Users Operating on a Heterogeneous Spectrum Environment

Authors:
Mohamed A. Kalil;Hassan Al-Mahdi;Andreas Mitschele-Thiel
Affiliations:
Integrated Communications Systems Group, Ilmenau University of Technology, Ilmenau, Germany and Faculty of Science, Suez University, Suez, Egypt;Faculty of Computers and Informations, Suez Canal University, Ismailia, Egypt and Faculty of Arts and Sciences, AlJouf University, Al Quryyat, Saudi Arabia;Integrated Communications Systems Group, Ilmenau University of Technology, Ilmenau, Germany
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

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Abstract

Radio spectrum is a limited natural resource and with the increasing number of wireless devices, an efficient spectrum management concept to make a better utilization of this resource is essential. Opportunistic spectrum access (OSA) concept is a solution to increase the spectrum capacity and thus reducing the data collision for wireless ad hoc networks. Cognitive radio (CR) technology is developed to realize OSA. Based on CR, the secondary users access opportunistically the spectrum owned by primary users. However, the consequence appearance of primary users affects greatly the performance of secondary users within OSA. Thus, a new spectrum management scheme is a must to reduce such effect. In this paper, a new spectrum management scheme over a heterogeneous spectrum environment is proposed. The proposed scheme is based on using channels from both licensed and unlicensed bands as spectrum environment for ad hoc networks. An analytical model based on Markov chains is developed to evaluate the proposed scheme.