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Opportunistic Spectrum Access via Periodic Channel Sensing (2008)
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| Venue: | IEEE Trans. Sig. Proc |
| Citations: | 80 - 13 self |
BibTeX
@ARTICLE{Zhao08opportunisticspectrum,
author = {Qianchuan Zhao and Stefan Geirhofer and Student Member and Lang Tong and Brian M. Sadler},
title = {Opportunistic Spectrum Access via Periodic Channel Sensing},
journal = {IEEE Trans. Sig. Proc},
year = {2008}
}
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Abstract
Abstract—The problem of opportunistic access of parallel channels occupied by primary users is considered. Under a continuoustime Markov chain modeling of the channel occupancy by the primary users, a slotted transmission protocol for secondary users using a periodic sensing strategy with optimal dynamic access is proposed. To maximize channel utilization while limiting interference to primary users, a framework of constrained Markov decision processes is presented, and the optimal access policy is derived via a linear program. Simulations are used for performance evaluation. It is demonstrated that periodic sensing yields negligible loss of throughput when the constraint on interference is tight. Index Terms—Constrained Markov decision processes, dynamic spectrum access, resource allocation. I.
Keyphrases
primary user opportunistic spectrum access periodic channel index term linear program continuoustime markov chain modeling parallel channel periodic sensing strategy resource allocation yield negligible loss markov decision slotted transmission protocol constrained markov decision secondary user channel utilization optimal dynamic access performance evaluation channel occupancy optimal access policy dynamic spectrum access opportunistic access
