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Cooperative communications among nodes is an efficient method to decrease signal fading and interference in MAC layer of wireless Ad hoc networks. However, the previous cooperative MAC protocols are designed for IEEE 802.11b, but not for later standard IEEE 802.11g or 802.11n. To increase performance, improve reliability and reduce energy consumption in communications, we propose a cooperative MAC...
Wireless sensor networks use battery-operated computing and sensing devices. Because of the limitation of battery power in the sensor nodes, energy conservation is a crucial issue in wireless sensor networks. Consequently, there is much literature presenting energy-efficient MAC protocols based on active/sleep duty cycle mechanisms to conserve energy. Convergecast is a common communication pattern...
In this paper, we propose an asynchronous duty cycle adjustment MAC protocol, called ADCA, for the wireless sensor network (WSN). ADCA is a sleep/wakeup schedule-based protocol to reduce power consumption without lowering network throughput or lengthening transmission delay. It is asynchronous; it allows each node in the WSN to set its own sleep/wakeup schedule independently. The media access is thus...
When we exploit multiple channels in MAC protocol, we can achieve a higher network throughput than using one single channel due to that multiple transmissions can take place simultaneously. In this paper, we proposed a novel group-based multichannel MAC protocol which cannot only utilize multiple channels to transmit data packets but allow using multiple channels to propagate control packets. The...
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