文章基本信息

标题：ADAPTIVE SENSING RANGE FOR CO-OPERATIVE SENSING COGNITIVE RADIO.
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作者：AARTI MANDAL ; A. KARTHIKEYAN ; T.SHANKAR 等
期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2013
卷号：53
期号：3
出版社：Journal of Theoretical and Applied
摘要：Cognitive radio is emerging as an effective solution against the spectrum scarcity issue. The main processes which make up the cognitive radio working are the spectrum sensing, learning and adapting procedures. Co-operative sensing is a method in which the nodes share the spectrum sensed data. In ad-hoc network the decentralized nature makes it quite difficult to gather sensing data with constraints like energy consumption, shadowing, hidden terminal and fading effect. In cognitive radio ad-hoc network these effects creates issues in spectrum allocation and management. In this paper, the hidden terminal issue is considered with the solution of adaptive sensing range in a static network. The nodes in the ad-hoc network have sensing and transmitting ranges. The sensing helps to gain knowledge about the channels which are occupied by overhearing the RTS/CTS or ACK transmission or reception by the nearby nodes. The sensing range of a node is always greater than the transmitting range of a terminal. The sensing range if varied as per the transmission to the receiver then hidden node issue can be dealt to a great level. With the help Cognitive radio Network Simulator (CR-NS) adaptive sensing is simulated for an ad-hoc network and also its effect on throughput, packet loss, normalized routing load, end-to-end packet delay is also compared with respected to a fixed sensing environment.
关键词：Cognitive Radio; Hidden Node; Co-Operative Sensing; Cognitive Radio Network Simulator (CR-NS)