Performance Evaluation of Spectrum Sensing and Channel Access in Cognitive Radio Networks
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2012 by IJETT Journal|
|Year of Publication : 2012|
|Authors : Soudilya.P|
Soudilya.P. " Performance Evaluation of Spectrum Sensing and Channel Access in Cognitive Radio Networks". International Journal of Engineering Trends and Technology (IJETT). V3(2):253-257 Mar-Apr 2012. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
Spectrum sensing is an essential functionality of cognitive radio networks. In the existing Cognitive Radio spectrum detection techniques secondary nodes base their channel access decisions solely on the outcome of the spectrum sensor without taki ng into consideration the possibility that those outco mes are incorrect. To alleviate the se negative effects a combined design is proposed for the secondary nodes to have better channel access where the spectrum sensor outcome and reliability measure of sp ectrum sensor decisions are considered. Simulation for characterizing the detrimental effects of spectrum sensor errors and effectiveness of combined design is done using binary hypothesis condition. Results show considerable increase in secondary access p robabilities which eventually increases the throughput and decreases the delay of both primary and secondary networks.
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Cognitive Radio, soft sensing, multiple access .