A+MAC: A streamlined variable duty-cycle MAC protocol for wireless sensor networks

Sang Hoon Lee, Lynn Choi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


To improve the energy efficiency and the transmission performance of a sensor network MAC protocol under time varying traffic conditions, recent researches have adopted a variable duty cycle operation that makes each node dynamically adjust its own wakeup and sleep schedule according to a predefined trigger condition. However, most of the existing protocols still waste energy on a long preamble packet for waking up a receiver or long idle listening for checking potential communications. To address the energy waste problem, this paper introduces a hybrid MAC protocol called A+MAC that exploits a complementary cooperation between CSMA/CA and preamble sampling. In A+MAC CSMA/CA is used for carrying out communication processes, and preamble sampling is used for checking potential communications. Therefore, A+MAC minimizes both idle listening and the length of a preamble packet by exploiting a short preamble that makes nodes check only the event occurrence. A+MAC also optimizes control packet formats and eliminates both virtual carrier sensing and a separate clock synchronization period from conventional CSMA/CA based MAC protocols. We evaluated both the energy and the network performance of the protocol by using both NS-2 and MICA2 platforms. Our experimentation results show that A+MAC can achieve an order of magnitude energy savings while providing near optimal latency compared to the existing solutions.

Original languageEnglish
Article number784509
JournalInternational Journal of Distributed Sensor Networks
Publication statusPublished - 2013

ASJC Scopus subject areas

  • Engineering(all)
  • Computer Networks and Communications


Dive into the research topics of 'A+MAC: A streamlined variable duty-cycle MAC protocol for wireless sensor networks'. Together they form a unique fingerprint.

Cite this