Research Article
Sensing Order Dispersion for Autonomous Cognitive Radios
@INPROCEEDINGS{10.4108/icst.crowncom.2011.246247, author={Zaheer Khan and Janne J. Lehtom\aa{}ki and Miia Mustonen and Marja Matinmikko}, title={Sensing Order Dispersion for Autonomous Cognitive Radios}, proceedings={6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2012}, month={5}, keywords={}, doi={10.4108/icst.crowncom.2011.246247} }- Zaheer Khan
Janne J. Lehtomäki
Miia Mustonen
Marja Matinmikko
Year: 2012
Sensing Order Dispersion for Autonomous Cognitive Radios
CROWNCOM
IEEE
DOI: 10.4108/icst.crowncom.2011.246247
Abstract
When autonomous cognitive radios (CRs) have to search multiple potential channels for spectrum opportunities, they face competition from one another to access the channel. The end result of this competition is reduced CR throughput due to collisions among CRs that transmit in the same channel. In this context, the channel sensing order, i.e., the order in which CRs competing for the channels visit those channels, will affect their probability of successful access. This paper presents an investigation into the sensing order dispersion problem, where two or more autonomous CRs attempt to avoid one another by selecting those sensing orders that reduce the likelihood of collisions among one another. We present adaptive strategies that enable the CRs to achieve sensing order dispersion. We evaluate the performance of the presented adaptive strategies in terms of expected time for the autonomous CRs to reach collision-free sensing orders and also in terms of average number of successful transmissions in the network.
