MACAW: a media access protocol for wireless LAN's
SIGCOMM '94 Proceedings of the conference on Communications architectures, protocols and applications
An adaptive energy-efficient MAC protocol for wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
IEEE Communications Magazine
MAC protocols for wireless sensor networks: a survey
IEEE Communications Magazine
ISWPC'09 Proceedings of the 4th international conference on Wireless pervasive computing
An novel energy-efficient MAC protocol based on collision avoidance for wireless sensor networks
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
A review of wireless sensors and networks' applications in agriculture
Computer Standards & Interfaces
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Energy consumption is one of the most crucial design issues in wireless sensor networks since prolonging the network lifetime depends on the efficient management of sensing node energy resource. In this research study, a new TDMA based MAC protocol, which is not only energy aware but also delay sensitive, is introduced for wireless sensor networks. In the proposed MAC, to achieve energy conservation, sensing nodes employing the proposed MAC sleeps periodically to reduce duty cycle and minimize idle listening. In addition, to provide lower message delay, any time critical sensing node requests extra time slots form the central node when its queue size exceeds the upper threshold value. Unlike common wireless sensor network models with a multi-hop topology, the proposed WSN architecture has a centralized structure especially for energy efficiency and fulfillment of the delay requirement of time critical networking applications. The proposed MAC has been modeled and simulated using OPNET Modeler Software for performance evaluation. Simulation results of the WSN model employing the new MAC are also presented including comparisons with those of a WSN counterpart employing conventional IEEE 802.11 DCF MAC protocol. By varying the interarrival time between 1 and 8 s for 100 wireless sensing nodes, in the best case, as a consequence of the new scheduling algorithms developed 9448 times better end to end message delay result and 1.9 times lower energy consumption ratio have been obtained for WSN employing the proposed MAC when compared with the WSN model employing IEEE 802.11 DCF MAC.