An energy-efficient MAC protocol using dynamic queue management for delay-tolerant mobile sensor networks.
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.
Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui 230027, China. myl@mail.ustc.edu.cn
Jie
J
Li
Qiyue
Q
Li
Yugui
Y
Qu
Baohua
B
Zhao
D000465:Algorithms; D003195:Computer Communication Networks / Q000295:instrumentation*; D008390:Markov Chains; D012815:Signal Processing, Computer-Assisted; D013223:Statistics as Topic / Q000379:methods*; D013816:Thermodynamics; D059015:Wireless Technology / Q000295:instrumentation*