An Energy-Efficient MAC Protocol Using Dynamic Queue Management for Delay-Tolerant Mobile Sensor Networks

Sensors

Jie Li¹  Qiyue Li²  Yugui Qu¹ 

[1] Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui 230027, China; E-Mails:;Department of Computer Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China; E-Mail:

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

DOI  :  10.3390/s110201847

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.