A POMDP Based Distributed Adaptive Opportunistic Spectrum Access Strategy for Cognitive Ad Hoc Networks

Yichen WANG  Pinyi REN  Zhou SU  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.6   pp.1621-1624
Publication Date: 2011/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.1621
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on New Generation Mobile and Sensor Networking and Future Networks)
Category: 
Keyword: 
cognitive radio,  opportunistic spectrum access,  partially observable Markov decision process (POMDP),  optimal stopping,  

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Summary: 
In this letter, we propose a Partially Observable Markov Decision Process (POMDP) based Distributed Adaptive Opportunistic Spectrum Access (DA-OSA) Strategy for Cognitive Ad Hoc Networks (CAHNs). In each slot, the source and destination choose a set of channels to sense and then decide the transmission channels based on the sensing results. In order to maximize the throughput for each link, we use the theories of sequential decision and optimal stopping to determine the optimal sensing channel set. Moreover, we also establish the myopic policy and exploit the monotonicity of the reward function that we use, which can be used to reduce the complexity of the sequential decision.