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Sensors (Basel). 2011;11(2):1847-64. doi: 10.3390/s110201847. Epub 2011 Feb 1.

An energy-efficient MAC protocol using dynamic queue management for delay-tolerant mobile sensor networks.

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Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui 230027, China.


Conventional MAC protocols for wireless sensor network perform poorly when faced with a delay-tolerant mobile network environment. Characterized by a highly dynamic and sparse topology, poor network connectivity as well as data delay-tolerance, delay-tolerant mobile sensor networks exacerbate the severe power constraints and memory limitations of nodes. This paper proposes an energy-efficient MAC protocol using dynamic queue management (EQ-MAC) for power saving and data queue management. Via data transfers initiated by the target sink and the use of a dynamic queue management strategy based on priority, EQ-MAC effectively avoids untargeted transfers, increases the chance of successful data transmission, and makes useful data reach the target terminal in a timely manner. Experimental results show that EQ-MAC has high energy efficiency in comparison with a conventional MAC protocol. It also achieves a 46% decrease in packet drop probability, 79% increase in system throughput, and 25% decrease in mean packet delay.


Ready to Receive; Wait to Send; delay-tolerant mobile sensor networks; medium access control; minimal probe frame; priority; queue management

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