Wireless and personal communications systems
Wireless and personal communications systems
Channel Occupancy Times and Handoff Rate for Mobile Computing and PCS Networks
IEEE Transactions on Computers
An Introduction to GSM
On handoff performance for an integrated voice/data cellular system
Wireless Networks
Modeling and performance evaluation of a cellular mobile network
IEEE/ACM Transactions on Networking (TON)
IEEE Spectrum
Modeling and analysis of interference in listen-before-talk spectrum access schemes
International Journal of Network Management
Sensing-based opportunistic channel access
Mobile Networks and Applications
International Journal of Communication Systems
System Modeling and Analysis: Foundations of System Performance Evaluation
System Modeling and Analysis: Foundations of System Performance Evaluation
A measurement-based model for dynamic spectrum access in WLAN channels
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
A multi-channel MAC for opportunistic spectrum sharing in cognitive networks
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
IEEE Transactions on Wireless Communications
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
Analysis of opportunistic spectrum sharing with Markovian arrivals and phase-type service
IEEE Transactions on Wireless Communications
Opportunistic spectrum sharing with multiple cochannel primary transmitters
IEEE Transactions on Wireless Communications
Spectrum sharing in cognitive radio networks with imperfect sensing: A discrete-time Markov model
Computer Networks: The International Journal of Computer and Telecommunications Networking
Reconnection Analysis for a Cognitive Radio Network with Unreliable Sensing
Wireless Personal Communications: An International Journal
CogNS: A Simulation Framework for Cognitive Radio Networks
Wireless Personal Communications: An International Journal
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We analyze the performance of a wireless system consisting of a set of secondary users opportunistically sharing bandwidth with a set of primary users over a coverage area. The secondary users employ spectrum sensing to detect channels that are unused by the primary users and hence make use of the idle channels. If an active secondary user detects the presence of a primary user on a given channel, it releases the channel and switches to another idle channel, if one is available. In the event that no channel is available, the call waits in a buffer until either a channel becomes available or a maximum waiting time is reached. Spectrum sensing errors on the part of a secondary user cause false alarm and misdetection events, which can potentially degrade the quality-of-service experienced by primary users. We derive system performance metrics of interest such as blocking probabilities. Our results suggest that opportunistic spectrum sharing can significantly improve spectrum efficiency and system capacity, even under unreliable spectrum detection. The proposed model and analysis method can be used to evaluate the performance of future opportunistic spectrum sharing systems.