Packet Delay and Energy Consumption Based on Markov Chain Model of the Frame-Based S-MAC Protocol under Unsaturated Conditions

Authors:
Seokjin Sung;Seok Woo;Kiseon Kim
Affiliations:
Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea 500-712;Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea 500-712;Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea 500-712
Venue:
Information Networking. Towards Ubiquitous Networking and Services
Year:
2008

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Abstract

In this paper, we analyze packet delay and energy consumption of the sensor-medium access control (S-MAC) protocol under unsaturated conditions. Since the S-MAC protocol always behaves with a fixed frame length, the frame-based architecture should be reflected in the S-MAC analysis. In addition, the node contention for transmitting a packet is also considered for more practical analysis on packet delay than that in the original paper suggested by Ye et al. [2]. Hence, we employ a Markov chain model to express the S-MAC behavior for the consideration of back-off delay, including node contention. Numerical results show the average packet delay and energy consumption of the node according to offered load and duty cycle where a practical mote running S-MAC is used.