Opportunistic Spectrum Access in Self-Similar Primary Traffic

We take a stochastic optimization approach to opportunity tracking and access in self-similar primary traffic. Based on a multiple time-scale hierarchical Markovian model, we formulate opportunity tracking and access in self-similar primary traffic as a Partially Observable Markov Decision Process....

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Bibliographic Details
Published in:EURASIP journal on advances in signal processing 2009-01, Vol.2009 (1), Article 762547
Main Authors: Xiao, Xiangyang, Liu, Keqin, Zhao, Qing
Format: Article
Language:English
Subjects:
Dynamic Spectrum Access for Wireless Networking
Engineering
Quantum Information Technology
Research Article
Signal,Image and Speech Processing
Spintronics
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Summary:We take a stochastic optimization approach to opportunity tracking and access in self-similar primary traffic. Based on a multiple time-scale hierarchical Markovian model, we formulate opportunity tracking and access in self-similar primary traffic as a Partially Observable Markov Decision Process. We show that for independent and stochastically identical channels under certain conditions, the myopic sensing policy has a simple round-robin structure that obviates the need to know the channel parameters; thus it is robust to channel model mismatch and variations. Furthermore, the myopic policy achieves comparable performance as the optimal policy that requires exponential complexity and assumes full knowledge of the channel model.
ISSN:1687-6180
1687-6172
1687-6180
DOI:10.1155/2009/762547