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Author(s):
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Pangun Park, Royal institute of technology, Sweden ; Piergiuseppe Di Marco, Royal Institute of Technology, Sweden; Pablo Soldati, Royal Institute of Technology, Sweden; Carlo Fischione, Royal Institute of Technology, Sweden; Karl Johansson, KTH, Sweden
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Abstract:
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A generalized analysis of the IEEE 802.15.4 medium access control (MAC) protocol in terms of reliability, delay and energy consumption is presented. The IEEE 802.15.4 exponential backoff process is modeled through a Markov chain taking into account retry limits, acknowledgements, and unsaturated traffic. Simple and effective approximations of the reliability, delay and energy consumption under low traffic regime are proposed. It is demonstrated that the delay distribution of IEEE 802.15.4 depends mainly on MAC parameters and collision probability. In addition, the impact of MAC parameters on the performance metrics is analyzed. The analysis hereby derived is much more general and accurate than previous results from the literature. Monte Carlo simulations confirm that the accurate analysis performs quite well, and that the approximations offer a satisfactory accuracy.
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