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IJSTR >> Volume 9 - Issue 2, February 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Channel Sensing Mechanisms In Cognitive Radio System

[Full Text]



J. Divya Lakshmi, Rangaiah L



Bandwidth, Channel sensing, Cognitive Radio, Network analysis tools, Network Design, Network performance, QualNet.



Cognitive radio is an advancement of the wireless technologies in which different licensed and unlicensed users can be accommodated into the same network spectrum. Cognitive radio allows the effective utilization of the network resources and the bandwidth which is idle most of the time if only primary users are allowed. Accommodating secondary unlicensed bands into the network spectrum is a complex process. The first step involved in this process is to sense the channel to check if all the network parameters allow a new user in the unlicensed band. There are several channel sensing mechanisms and approaches that can be used for specific requirements. This paper lists and analyzes several channels sensing approaches and compares the efficiency. Among the channel sensing mechanisms are analyzed for their efficiency in various conditions and requirements. The implementation complexity and accuracy of each approach are analyzed qualitatively. A generic algorithm on how the secondary users can sense the network and transmit the data is also provided. The implementation guidelines can be followed to simulate the channel sensing mechanism in any network tool.



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