Finite-time Analysis of the Multiarmed Bandit Problem
Machine Learning
IEEE 802.11 rate adaptation: a practical approach
MSWiM '04 Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Fundamentals of wireless communication
Fundamentals of wireless communication
Prediction, Learning, and Games
Prediction, Learning, and Games
Robust rate adaptation for 802.11 wireless networks
Proceedings of the 12th annual international conference on Mobile computing and networking
Optimal channel probing and transmission scheduling for opportunistic spectrum access
Proceedings of the 13th annual ACM international conference on Mobile computing and networking
Opportunistic spectral usage: bounds and a multi-band CSMA/CA protocol
IEEE/ACM Transactions on Networking (TON)
SMARTA: a self-managing architecture for thin access points
CoNEXT '06 Proceedings of the 2006 ACM CoNEXT conference
In-band spectrum sensing in cognitive radio networks: energy detection or feature detection?
Proceedings of the 14th ACM international conference on Mobile computing and networking
Proceedings of the 14th ACM international conference on Mobile computing and networking
Scheduling with limited information in wireless systems
Proceedings of the tenth ACM international symposium on Mobile ad hoc networking and computing
Optimality of myopic sensing in multichannel opportunistic access
IEEE Transactions on Information Theory
Algorithms for dynamic spectrum access with learning for cognitive radio
IEEE Transactions on Signal Processing
Dynamic multichannel access with imperfect channel state detection
IEEE Transactions on Signal Processing
Opportunistic spectrum access with multiple users: learning under competition
INFOCOM'10 Proceedings of the 29th conference on Information communications
Predictable 802.11 packet delivery from wireless channel measurements
Proceedings of the ACM SIGCOMM 2010 conference
AccuRate: constellation based rate estimation in wireless networks
NSDI'10 Proceedings of the 7th USENIX conference on Networked systems design and implementation
Cognitive Medium Access: Exploration, Exploitation, and Competition
IEEE Transactions on Mobile Computing
Decentralized cognitive MAC for opportunistic spectrum access in ad hoc networks: A POMDP framework
IEEE Journal on Selected Areas in Communications
Optimal joint probing and transmission strategy for maximizing throughput in wireless systems
IEEE Journal on Selected Areas in Communications
CSpy: finding the best quality channel without probing
Proceedings of the 19th annual international conference on Mobile computing & networking
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We investigate dynamic channel, rate selection and scheduling for wireless systems which exploit the large number of channels available in the White-space spectrum. We first present measurements of radio channel characteristics from an indoor testbed operating in the 500 to 600MHz band and comprising 11 channels. We observe significant and unpredictable (non-stationary) variations in the quality of these channels, and demonstrate the potential benefit in throughput from tracking the best channel and also from optimally adapting the transmission rate. We propose adaptive learning schemes able to efficiently track the best channel and rate for transmission, even in scenarios with non-stationary channel condition variations. We also describe a joint scheduling scheme for providing fairness in an Access Point scenario. Finally, we implement the proposed adaptive scheme in our testbed, and demonstrate that it achieves significant throughput improvement (typically from 40% to 100%) compared to traditional fixed channel selection schemes.