EP-MAC: Early Preamble MAC To Achieve Low Delay And Energy Consumption In Duty Cycle Based Asynchronous Wireless Sensor Networks

• Jeong-Yeob Oak,
• Young-June Choi,
• Wooguil Pak,

Vol. 6, No. 11, November 29, 2012
10.3837/tiis.2012.11.013, Download Paper (Free):

• Wireless Sensor Networks
• Duty cycle
• preamble
• Energy efficient
• anycast

Abstract

Since wireless sensor networks are broadly used in various areas, there have been a number of protocols developed to satisfy specific constraints of each application. The most important and common requirements regardless of application types are to provide a long network lifetime and small end-to-end delay. In this paper, we propose Early Preamble MAC (EP-MAC) with improved energy conservation and low latency. It is based on CMAC but adopts a new preamble type called ‘early preamble’. In EP-MAC, a transmitting node can find quickly when a next receiving node wakes up, so EP-MAC enables direct data forwarding in the next phase. From numerical analysis, we show that EP-MAC improves energy consumption and latency greatly compared to CMAC. We also implemented EP-MAC with NS-2, and through extensive simulation, we confirmed that EP-MAC outperforms CMAC.

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