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Energy Efficient Channel Sensing Scheduling in Cognitive Radio Networks  

Choi, Woo-Jeong (인하대학교 정보통신공학과)
Yoo, Sang-Jo (인하대학교 정보통신공학과)
Seo, Myunghwan (삼성탈레스)
Cho, Hyung-Weon (삼성탈레스)
Publication Information
Journal of Satellite, Information and Communications / v.10, no.2, 2015 , pp. 1-9 More about this Journal
Abstract
Recently, cognitive radio technology has been spotlighted for the efficient use of limited frequency technology. The most important part of CR is to protect the incumbent user's communications. Therefore, CR user should be sensing the currently using channel and another hopping channel for sudden appearance of the Incumbent User. In this paper, we propose the cooperative channel sensing to protect the IU considering each CR user's remained power and sensing-zone, sense the spectrum bands in a fairly distributed manner and share the results among the users within respective sensing zone. Sensing scheme including inband sensing and outband sensing is utilized. The inband sensing is in charge of current using channel scanning while the outband sensing mainly cares about other channels. The performance results by computer simulations show that our sensing scheduling scheme reduces the number of sensing nodes and saves energy need to channel sensing.
Keywords
cognitive radio; energy efficient; channel sensing; sensing scheduling; sensing;
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