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Journal of Applied Mathematics
Volume 2014 (2014), Article ID 934610, 15 pages
http://dx.doi.org/10.1155/2014/934610
Research Article

Analysis and Enhancement of IEEE 802.15.4e DSME Beacon Scheduling Model

Department of Embedded Systems Engineering, Incheon National University, Incheon 402-772, Republic of Korea

Received 23 January 2014; Accepted 6 April 2014; Published 6 May 2014

Academic Editor: Young-Sik Jeong

Copyright © 2014 Kwang-il Hwang and Sung-wook Nam. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In order to construct a successful Internet of things (IoT), reliable network construction and maintenance in a sensor domain should be supported. However, IEEE 802.15.4, which is the most representative wireless standard for IoT, still has problems in constructing a large-scale sensor network, such as beacon collision. To overcome some problems in IEEE 802.15.4, the 15.4e task group proposed various different modes of operation. Particularly, the IEEE 802.15.4e deterministic and synchronous multichannel extension (DSME) mode presents a novel scheduling model to solve beacon collision problems. However, the DSME model specified in the 15.4e draft does not present a concrete design model but a conceptual abstract model. Therefore, in this paper we introduce a DSME beacon scheduling model and present a concrete design model. Furthermore, validity and performance of DSME are evaluated through experiments. Based on experiment results, we analyze the problems and limitations of DSME, present solutions step by step, and finally propose an enhanced DSME beacon scheduling model. Through additional experiments, we prove the performance superiority of enhanced DSME.