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QoS-Aware Channel Sensing Scheduling for Cognitive Radio Network  

Kwon, Ki-Hyuk (인하대학교 정보통신대학원 멀티미디어통신망 연구실)
Choi, Jae-Kark (인하대학교 정보통신대학원 멀티미디어통신망 연구실)
Yoo, Sang-Jo (인하대학교 정보통신대학원)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.6A, 2009 , pp. 484-493 More about this Journal
Abstract
For the flexible frequency utilization, cognitive radio technique has been prominently considered. The most important requirement in cognitive radio networks is to protect the communications of primary users. Spectrum sensing task by secondary users should be seriously considered in cognitive radio networks, since the spectrum sensing process makes their current quality of service worse. In this paper, we propose the channel sensing scheduling method that keeps the requirements for protecting the primary and guarantee the secondary user's quality of service as possible. The quality of service of secondary user is analyzed in terms of packet delay and loss while the protection-requirements in terms of sensing interval and sensing time predefined. In numerical analysis, we can get appropriate parameters which guarantee QoS in various environment. And simulation results show that this method can improve the performance, delay and the number of transmitted packets against consecutive sensing method.
Keywords
Cognitive Radio; Channel Sensing; Sensing Scheduling;
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