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http://dx.doi.org/10.5302/J.ICROS.2008.14.3.318

A Dynamic Backoff Adjustment Method of IEEE 802.15.4 Networks for Real-Time Sporadic Data Transmission  

Lee, Jung-Il (금오공과대학교 전자공학부)
Kim, Dong-Sung (금오공과대학교 전자공학부)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.14, no.3, 2008 , pp. 318-325 More about this Journal
Abstract
In this paper, a dynamic backoff adjustment method of IEEE 802.15.4 is proposed for time-critical sporadic data in a noisy factory environment. For this, a superframe of IEEE 802.15.4 is applied to a real-time mixed data (periodic data, sporadic data, and non real-time message) transmission in factory communication systems. To guarantee a channel access of real-time sporadic(non-periodic) data, a transmission method using the dynamic backoff is applied to wireless control networks. For the real-time property, different initial BE, CW parameters are used for the dynamic backoff adjustment method. The simulat-ion results show an enhancement of the real-time performance of sporadic emergency data. The proposed method provides the channel access of real-time sporadic data efficiently, and guarantee real-time transmission simultaneously within a limite-d timeframe.
Keywords
dynamic backoff adjustment method; IEEE 802.15.4 superframe; wireless control network; real-time sporadic data;
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