naa a22 4500 510793061 CHVBK 20180411083326.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11277-012-0858-1 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0858-1 A Distributed MAC Protocol Using Virtual Control Channels for CRSNs [Elektronische Daten] [Youngdoo Lee, Insoo Koo] A cognitive radio sensor network (CRSN) is a promising fusion network that combines conventional wireless sensor network (WSN) with cognitive radio (CR) functionalities. With abilities to sense for available channels and to adapt to the radio environment, a CRSN is able to be more opportunistic in accessing spectrums than a WSN, but it also has problems due to hardware constraints and energy limitations. In many studies on distributed CR MAC protocols, establishing dedicated control channels (DCCs) has been considered as an important problem because it is essentially used for coordination and negotiation of spectrum assignments. However, directly applying DCCs into CRSNs is impractical, due to its high-cost complexity in hardware and deployment. To solve it, in this paper we propose a distributed MAC protocol using virtual control channels for CRSNs, in which CR sensor nodes called secondary users are grouped into clusters, and commonly shared available channels are utilized as virtual DCCs. In addition, a channel selection scheme is developed, based on an approximated partially observable Markov decision process. Our numerical simulation results indicate that the proposed MAC protocol can not only improve the throughput rate but also reduce the energy consumption under no DCCs. Springer Science+Business Media New York, 2012 Cognitive radio sensor network nationallicence Hardware constraint nationallicence Virtual control channel nationallicence Partially observable Markov decision process nationallicence Lee Youngdoo Electrical Engineering, University of Ulsan, Ulsan, South Korea aut Koo Insoo Electrical Engineering, University of Ulsan, Ulsan, South Korea aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/2(2013-07-01), 1021-1048 0929-6212 71:2<1021 2013 71 11277 https://doi.org/10.1007/s11277-012-0858-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0858-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lee Youngdoo Electrical Engineering, University of Ulsan, Ulsan, South Korea aut NATIONALLICENCE 700 1- Koo Insoo Electrical Engineering, University of Ulsan, Ulsan, South Korea aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/2(2013-07-01), 1021-1048 0929-6212 71:2<1021 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer