標題: On Synchronized Channel Sensing and Accessing for Cognitive Radio Users in IEEE 802.11 Wireless Networks
作者: Lou, TakChon
Chao, Hsi-Lu
Tsai, Tzu-Jane
資訊工程學系
Department of Computer Science
關鍵字: Cognitive radio;channel sensing;channel accessing;synchronized channel hopping;channel vacating
公開日期: 2009
摘要: One of the most challenging issues in cognitive radio systems is channel sensing and channel accessing. In this paper, a synchronized channel-sensing and accessing for cognitive radio users in IEEE 802.11 wireless networks is proposed. The mechanism consists of two phases: fast channel sensing and proactive channel vacating. Fast channel sensing is for a pair of cognitive radio users to search an available channel time-efficiently; proactive channel vacating is for the pair of cognitive radio users to be aware of the presence of primary users and vacate the occupied channel as quick as possible. We utilize the concept of channel hopping to reduce the average channel sensing time of cognitive radio users. Besides, through the designed interruption mechanism, cognitive radio users can create opportunities for primary users to claim the spectrum and thus minimize the caused interference to primary users. From the simulation results, our proposed protocol can efficiently balance the tradeoff between throughput performance of a cognitive radio network and waiting time of primary users to claim channels.
URI: http://hdl.handle.net/11536/17060
http://dx.doi.org/10.1109/PIMRC.2009.5450103
ISBN: 978-1-4244-5123-4
DOI: 10.1109/PIMRC.2009.5450103
期刊: 2009 IEEE 20TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS
起始頁: 757
結束頁: 761
Appears in Collections:Conferences Paper


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