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Journal of Information Science and Engineering, Vol. 23 No. 4, pp. 1057-1071 (July 2007)

C-MAC: An Energy-Efficient MAC Scheme Using Chinese-Remainder-Theorem for Wireless Sensor Networks

Yuh-Shyan Chen and Yun-Wei Lin
 1Department of Computer Science and Information Engineering
National Taipei University
Taipei, 237 Taiwan
E-mail: yschen@csie.ntpu.edu.tw
2Department of Computer Science and Information Engineering
National Chung Cheng University
Chiayi, 621 Taiwan
E-mail: jyneda@giam.dynu.com

This paper investigates a new TDMA-based MAC, called C-MAC (MAC using Chinese remainder theorem), protocol with low power consumption while maintaining low packet latency for largescale cluster-based WSNs. To offer low power consumption, each node and coordinator to be active and sleep states based on the time-slot schedule of Chinese remainder theorem. To provide low packet latency, our C-MAC protocol provides an adaptive time-slot scheme to distributively and dynamically wake up time slots for the burst data transmission in a duty cycle. Finally, simulation results illustrate our performance achievements to verify that C-MAC performs better than existing TDMAbased MAC protocols, BMA and EMAC, in terms of power consumption and average packet latency.

Keywords: wireless sensor networks, MAC, latency, energy efficient operation, energyefficient scheduling

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Received September 15, 2006; accepted February 6, 2007.
Communicated by Ten H. Lai, Chung-Ta King and Jehn-Ruey Jiang.