Discrete-time Queuing Analysis of Opportunistic Spectrum Access: Single User Case
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Abstract
This article studies the discrete-time queuing dynamics of opportunistic spectrum access (OSA) systems, in which the secondary user seeks spectrum vacancies between bursty transmissions of the primary user to communicate. Since spectrum sensing and data transmission can not be performed simultaneously, the secondary user employs a sensing-then-transmission strategy to detect the presence of the primary user before accessing the licensed channel. Consequently, the transmission of the secondary user is periodically suspended for spectrum sensing. To capture the discontinuous transmission nature of the secondary user, we introduce a discrete-time queuing subjected to bursty preemption to describe the behavior of the secondary user. Specifically, we derive some important metrics of the secondary user, including secondary spectrum utilization ratio, buffer length, packet delay and packet dropping ratio. Finally, simulation results validate the proposed theoretical model and reveal that the theoretical results fit the simulated results well.
Copyright © 2011 De Gruyter
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Artikel in diesem Heft
- Modal Ellipticity Characterization of Thermally Expanded Core Polarization Maintaining Optical Fibers
- Intra-channel Fiber Nonlinearity Mitigation Based on DBP in Single Channel and WDM Coherent Optical Transmission Systems Using Different Pulse Shapes
- Performance Analysis of Amplify-and-Forward Relaying over Shadowed Nakagami-m Fading Channels
- Performance Analysis of SSC/SC Combiner at Two Time Instants in the Presence of Rayleigh Fading
- Iterative Suboptimal Maximum Likelihood Receiver for Nonlinearly Distorted SC-FDMA Symbols
- Discrete-time Queuing Analysis of Opportunistic Spectrum Access: Single User Case
- Multi-Domain Cognition for Cognitive Wireless Networks
- Reliable Multicast MAC Protocol for IEEE 802.11 Wireless LANs with Extended Service Range
