kumoh national institute of technology
Networked Systems Lab.

J.I.Lee and Dong-Seong Kim, "A Dynamic Backoff Adjustment Method of IEEE 802.15.4 Networks for Real-Time Sporadic Data Transmission", Vol. 14, No. 2, Journal of Control, Automation and Systems Engineering, Feb. 2008.
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Date : 2013-02-04
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J.I.Lee and Dong-Seong Kim, "A Dynamic Backoff Adjustment Method of IEEE 802.15.4 Networks for Real-Time Sporadic Data Transmission", Vol. 14, No. 2, pp. 318-325, Journal of Control, Automation and Systems Engineering, Feb. 2008.


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.


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