摘要：Recently, cognitive radio (CR) technology is broadly applied even to sensor networks. Cognitive radio sensor networks (CRSNs) have been studied and, apparently, sensor nodes equipped with directional antennas achieve higher energy efficiency. This paper proposes a medium access control (MAC) protocol named directional CR-aware MAC (DC-MAC) for CRSNs. To the best of the authors' knowledge, this is the first work to propose a MAC protocol for CRSNs with directional antennas. The simulation study shows that DC-MAC is more energy efficient than the conventional protocol by 50%–60% for the RMF TR 1001 transceiver and by 20%–50% for the Bluetooth transceiver.
关键词：Cognitive radio sensor network; cognitive radio; directional antenna; ; medium access control; energy efficiency
