The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Personal locator services emerge
IEEE Spectrum
Localized algorithms in wireless ad-hoc networks: location discovery and sensor exposure
MobiHoc '01 Proceedings of the 2nd ACM international symposium on Mobile ad hoc networking & computing
A Probabilistic Room Location Service for Wireless Networked Environments
UbiComp '01 Proceedings of the 3rd international conference on Ubiquitous Computing
IEEE 802.11 Wireless Local Area Networks
IEEE Communications Magazine
GUESS: gossiping updates for efficient spectrum sensing
MobiShare '06 Proceedings of the 1st international workshop on Decentralized resource sharing in mobile computing and networking
Reliable open spectrum communications through proactive spectrum access
TAPAS '06 Proceedings of the first international workshop on Technology and policy for accessing spectrum
Dynamic Channel Selection for Cognitive Radios with Heterogenous Primary Bands
Wireless Personal Communications: An International Journal
International Journal of Sensor Networks
Operating point selection for primary and secondary users in cognitive radio networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Modeling and analysis of opportunistic spectrum sharing with unreliable spectrum sensing
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Analysis of opportunistic spectrum sharing with Markovian arrivals and phase-type service
IEEE Transactions on Wireless Communications
Management System for Terminals in the Wireless B3G World
Wireless Personal Communications: An International Journal
Telematics and Informatics
Optimal sensing strategy for opportunistic secondary users in a cognitive radio network
Proceedings of the 13th ACM international conference on Modeling, analysis, and simulation of wireless and mobile systems
Context Matching for Realizing Cognitive Wireless Network Segments
Wireless Personal Communications: An International Journal
Distributed iterative quantization for interference characterization in wireless networks
Digital Signal Processing
Utility-Aware Cognitive Network Selections in Wireless Infrastructures
Wireless Personal Communications: An International Journal
Non-intrusive Cognitive Radio Using Adaptive Nulls-Steering
Wireless Personal Communications: An International Journal
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Enabled by regulatory initiatives and advanced radio technologies, more flexible opportunistic spectrum access has great potential to alleviate the spectrum scarcity. In this paper, we study the channel selection issue of secondary users in spectrum-agile communication systems. We focus on the sensing-based approach because it is simple and has low infrastructure requirements. We propose a two-step approach for channel selection. The first step is to determine whether or not a channel is idle and thus accessible to secondary users. We propose three algorithms to perform the accessibility check based on measurements of primary signals. Then we address the question whether an accessible channel is a good opportunity for a secondary user.