An efficient transmission strategy in 802.11 MAC in wireless delay-tolerant sensor network

In a wireless delay-tolerant sensor network, the sensors must carry the data and wait for the delivery opportunity to forward the data. The probability of delivery largely depends on the current wireless channel connections. The sensors can optimally use the delivery opportunities to transmit the data while considering the data and nodes attributes. In this paper, we propose a transmission strategy in MAC 802.11 to efficiently transmit different types of data with energy saving considerations in one contact interval. The transmission power consumption and data throughput are the main measurements in our strategy to evaluate the transmission performance. We also consider the node buffer and data types as elements that impact the transmission throughput and power consumption. The simulation results show that the strategy efficiently transmits different data in an energy-saving and data-throughput-balanced way in one contact interval.