On spectrum sensing, resource allocation, and medium access control in cognitive radio networks

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2015-05, 2014-08, 2013-11, 2013-06, 2012-12
Karaputugala Gamacharige, Madushan Thilina
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IEEE Transactions on Vehicular Technology
IEEE Communications Magazine
IEEE Transactions on Vehicular Technology
IEEE Journal on Selected Areas in Communications
IEEE International Conference on Communication (ICC’13)
IEEE Global Communications Conference (Globecom’ 12)
The cognitive radio-based wireless networks have been proposed as a promising technology to improve the utilization of the radio spectrum through opportunistic spectrum access. In this context, the cognitive radios opportunistically access the spectrum which is licensed to primary users when the primary user transmission is detected to be absent. For opportunistic spectrum access, the cognitive radios should sense the radio environment and allocate the spectrum and power based on the sensing results. To this end, in this thesis, I develop a novel cooperative spectrum sensing scheme for cognitive radio networks (CRNs) based on machine learning techniques which are used for pattern classification. In this regard, unsupervised and supervised learning-based classification techniques are implemented for cooperative spectrum sensing. Secondly, I propose a novel joint channel and power allocation scheme for downlink transmission in cellular CRNs. I formulate the downlink resource allocation problem as a generalized spectral-footprint minimization problem. The channel assignment problem for secondary users is solved by applying a modified Hungarian algorithm while the power allocation subproblem is solved by using Lagrangian technique. Specifically, I propose a low-complexity modified Hungarian algorithm for subchannel allocation which exploits the local information in the cost matrix. Finally, I propose a novel dynamic common control channel-based medium access control (MAC) protocol for CRNs. Specifically, unlike the traditional dedicated control channel-based MAC protocols, the proposed MAC protocol eliminates the requirement of a dedicated channel for control information exchange.
Cognitive radio networks, Resource allocation, Medium access control, MAC protocol, Spectrum sensing, Machine learning, Dynamic common control channel, Spectral footprint, Generalized spectral footprint minimization, pattern recognition, SVM, KNN, K-Meam, GMM, OFDMA, Multiuser, cellular
K. M. Thilina, and E. Hossain, ”Cognitive Radio Networks and Spectrum Sharing” book chapter in Transmission Techniques for Digital Communications (Eds. Sarah Kate Wilson and Stephen Wilson), Elsevier - to appear
K. M. Thilina, E. Hossain, and D.I. Kim, “DCCC-MAC: A Dynamic Common Control Channel-Based MAC Protocol for Cognitive Radio Networks,” IEEE Transactions on Vehicular Technology, to appear.
K.M. Thilina, H. Tabassum, E. Hossain, and D.I. Kim, ”Medium access control design for full duplex wireless systems: challenges and approaches,” IEEE Communications Magazine , vol.53, no.5, pp.112,120, May 2015
K. Thilina, E. Hossain, and M. Moghadari, “Cellular OFDMA Cognitive Radio Networks: Generalized Spectral Footprint Minimization,” IEEE Transactions on Vehicular Technology, August 2014
K. M. Thilina, K.W. Choi, N. Saquib, and E. Hossain, “Machine Learning Techniques for Cooperative Spectrum Sensing in Cognitive Radio Networks,” IEEE Journal on Selected Areas in Communications, vol. 31, no.11 pp. 2209–2221, November 2013
K. M. Thilina, M. Moghadari and E. Hossain, “Generalized Spectral Footprint Minimization for Multiuser Cognitive Radio Networks,” in Proc. IEEE Int. Conf. on Communication (ICC’13) , Sydney, Australia, 10-14 June 2013.
K. M. Thilina, K. W. Choi, N. Saquib, and E. Hossain, “Pattern Classification Techniques for Cooperative Spectrum Sensing in Cognitive Radio Networks: SVM and W-KNN Approaches,” in Proc. IEEE Global Communications Conference (Globecom’ 12), Anaheim, California, USA, 2012.