Mining Frequent Closed Patterns in Microarray Data
ICDM '04 Proceedings of the Fourth IEEE International Conference on Data Mining
Chicago spectrum occupancy measurements & analysis and a long-term studies proposal
TAPAS '06 Proceedings of the first international workshop on Technology and policy for accessing spectrum
Frequent pattern mining: current status and future directions
Data Mining and Knowledge Discovery
Cooperative relay to improve diversity in cognitive radio networks
IEEE Communications Magazine
Mining frequent episodes for relating financial events and stock trends
PAKDD'03 Proceedings of the 7th Pacific-Asia conference on Advances in knowledge discovery and data mining
Direction finding and “smart antennas” using software radio architectures
IEEE Communications Magazine
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Cooperation among wireless service providers: opportunity, challenge, and solution
IEEE Wireless Communications
On the feasibility of effective opportunistic spectrum access
IMC '10 Proceedings of the 10th ACM SIGCOMM conference on Internet measurement
Cognitive radios for dynamic spectrum access: from concept to reality
IEEE Wireless Communications
SpecNet: spectrum sensing sans frontières
Proceedings of the 8th USENIX conference on Networked systems design and implementation
Proceedings of the Nineteenth International Workshop on Quality of Service
The problem of sensing unused cellular spectrum
NETWORKING'11 Proceedings of the 10th international IFIP TC 6 conference on Networking - Volume Part II
Revenue maximization in spectrum auction for dynamic spectrum access
Proceedings of the 5th International ICST Conference on Performance Evaluation Methodologies and Tools
Application-aware dynamic spectrum access
Wireless Networks
Mining frequent partial periodic patterns in spectrum usage data
Proceedings of the 2012 IEEE 20th International Workshop on Quality of Service
DSASync: managing end-to-end connections in dynamic spectrum access wireless LANs
IEEE/ACM Transactions on Networking (TON)
The effectiveness of opportunistic spectrum access: a measurement study
IEEE/ACM Transactions on Networking (TON)
Exploring indoor white spaces in metropolises
Proceedings of the 19th annual international conference on Mobile computing & networking
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Dynamic spectrum access has been a subject of extensive research activity in recent years. The increasing volume of literature calls for a deeper understanding of the characteristics of current spectrum utilization. In this paper we present a detailed spectrum measurement study, with data collected in the 20MHz to 3GHz spectrum band and at four locations concurrently in South China. We examine the first and second order statistics of the collected data, including channel occupancy/vacancy statistics, channel utilization within each individual wireless service, and the temporal, spectral, and spatial correlation of these measures. Main findings include that the channel vacancy durations follow an exponential-like distribution, but are not independently distributed over time, and that significant spectral and spatial correlations are found between channels of the same service. We then exploit such spectrum correlation to develop a 2-dimensional frequent pattern mining algorithm that can accurately predict channel availability based on past observations.