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Published in: Wireless Personal Communications 4/2016

01-08-2016

Cooperative Prediction for Cognitive Radio Networks

Authors: Simon D. Barnes, Bodhaswar T. Maharaj, Attahiru S. Alfa

Published in: Wireless Personal Communications | Issue 4/2016

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Abstract

Combining spectrum sensing (SS) and primary user (PU) traffic forecasting provides a cognitive radio network with a platform from which informed and proactive operational decisions can be made. The success of these decisions is largely dependent on prediction accuracy. Allowing secondary users (SU) to perform these predictions in a collaborative manner allows for an improvement in the accuracy of this process, since individual SUs may suffer from SS and prediction inaccuracies due to poor channel conditions. To overcome these problems a collaborative approach to forecasting PU traffic behaviour, that combines SS and forecasting through SU cooperation, has been proposed in this article. Both pre-fusion and post-fusion scenarios for cooperative prediction were investigated and a number of binary prediction methods were considered (including the authors’ own simple technique). Cooperative prediction performance was investigated, under various PU traffic conditions, for a group of ten SUs experiencing different channel conditions and a sub-optimal cooperative forecasting algorithm was proposed to minimise cooperative prediction error. Simulation results indicated that the accuracy of the prediction methods was influenced by the PU traffic pattern and that cooperative prediction lead to a significant improvement in prediction accuracy under most of the traffic conditions considered. However, this came at the cost of increased computational complexity. The pre-fusion scenario was found to be the most accurate scenario (up to 25 % improvement), but was also eleven times more complex than when no fusion was employed. The cooperative forecasting algorithm was found to further improve these results.

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Appendix
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Metadata
Title
Cooperative Prediction for Cognitive Radio Networks
Authors
Simon D. Barnes
Bodhaswar T. Maharaj
Attahiru S. Alfa
Publication date
01-08-2016
Publisher
Springer US
Published in
Wireless Personal Communications / Issue 4/2016
Print ISSN: 0929-6212
Electronic ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-016-3311-z

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