NDLI: A slotted Aloha based random access cognitive radio network and its performance evaluation

Content Provider	IEEE Xplore Digital Library
Author	Bayrakdar, M.E. Atmaca, S. Karahan, A.
Copyright Year	2012
Description	Author affiliation: Kocaeli University, Technical Education Faculty, Kocaeli, Turkey (Bayrakdar, M.E.; Atmaca, S.; Karahan, A.)
Abstract	In this paper, a slotted Aloha based cognitive radio (CR) network that consists of two classes of users, primary users (PUs) and CR users is considered and its throughput performance is evaluated. PUs and CR users share the time slotted based common communication channel. PUs are authorized to access the channel and utilize Time Division Multiple Access (TDMA) as a Medium Access Control (MAC) technique. CR users employ slotted Aloha as a random access scheme and can access the channel when it is not occupied by the PUs. We have derived new expressions for the throughput of both CR network and overall network to evaluate the channel utilization. In addition, an example network scenario has been developed, modeled and simulated by using the OPNET Modeler simulation software with the aim of verifying the analytical throughput results. The simulation results obtained under various network load conditions are precisely match with the analytical results. This study has also shown that the overall channel utilization can be improved by well exploiting the spectrum holes without interfering with the PUs' transmissions.
Starting Page	1
Ending Page	5
File Size	255895
Page Count	5
File Format	PDF
ISBN	9781467327107
e-ISBN	9789532900361
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-11
Publisher Place	Croatia
Access Restriction	Subscribed
Rights Holder	University of Split
Subject Keyword	Time division multiple access Analytical models Base stations Throughput Sensors Cognitive radio
Content Type	Text
Resource Type	Article

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