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Agile Spectrum Evacuation in Cognitive Radio Networks |
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Cognitive radio networks technology is becoming more and more appealing in utilizing the RF spectrum in modern days. One of the most important aspect of this technology is to avoid the interference on the primary system through agile evacuation of spectrum by secondary users. This task is generally accomplished by means of spectrum sensing. The interference is typically avoided by sensing a particular spectrum band for the existence of primary transmitter while no secondary user is using that band. Hence, a periodic sensing method is used which incorporates alternate phases of sensing and transmission by secondary user. In this paper, we introduce a new method of agile spectrum evacuation that allows any secondary user to continue using the band until the return of the primary user is detected through the formation of a set of users that exclusively engages in sensing primary user in a cooperative manner. The proposed method yields better interference protection and enhanced spectrum utilization. |
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Mohammad Iqbal Bin Shahid is doing PhD in IT in GSIT, Monash University. His supervisor is Dr. Joarder Kamruzzaman. His research topic is dynamic spectrum access management in cognitive radio networks. He completed his M. Sc. from the Department of Computer Science and Engineering and B.Sc. from the Department of Electrical and Electronic Engineering of Bangladesh University of Engineering and Technology. Before joining here he was serving as an Assistant Professor of Department of Computer Science and Engineering in Dhaka University of Engineering and Technology, Bangladesh. |
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