%0 Journal Article
%T An Energy-Efficient MAC Protocol Using Dynamic Queue Management for Delay-Tolerant Mobile Sensor Networks
%A Jie Li
%A Qiyue Li
%A Yugui Qu
%A Baohua Zhao
%J Sensors
%D 2011
%I MDPI AG
%R 10.3390/s110201847
%X 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.
%K delay-tolerant mobile sensor networks
%K minimal probe frame
%K Wait to Send
%K Ready to Receive
%K queue management
%K priority
%K medium access control
%U http://www.mdpi.com/1424-8220/11/2/1847