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Title: RF-Spectrum Opportunities for Cognitive Radio Networks Operating Over GSM Channels
Authors: Dinis, Rui
Luís, Miguel
Oliveira, Rodolfo
Bernardo, Luis
Keywords: Cognitive radio
ANSI escape code
Radio frequency
Maximum throughput scheduling
Computer simulation
Issue Date: 2017
Publisher: IEEE
Abstract: In this paper, we characterize the radio frequency spectrum opportunities available in a common global system for mobile communications (GSM) channel to support the operation of a cognitive radio network (CRN). In a first step, we describe the technical details involved to sample the channel using a software defined radio device. Adopting a simple energy-based detector, we identify the two energy regions where the GSM system is active or inactive and evaluate the spectrum sensing accuracy. Based on the output of the detector, we show that the distribution of the durations of busy and idle periods are approximated by geometric distributions. Finally, we validate a theoretical model for the distribution of the service time. The validation results indicate that the service time can be successfully represented by a discrete generalized Pareto distribution, which is confirmed by the Kolmogorov–Smirnov test. Because the throughput of the CRN is represented by the inverse of the service time, the proposed analysis provides an upper bound for the networks’ throughput, indicating the maximum throughput that can be attained when a single secondary user transmits over a GSM cellular channel. The results presented in this paper are validated with real data, confirming the accuracy of the proposed service time model.
Peer Reviewed: yes
metadata.dc.identifier.doi: 10.1109/TCCN.2017.2771558
ISSN: 2332-7731
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Appears in Collections:DCT - Artigos/Papers

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