비주기적 실시간 데이터 전송을 위한 IEEE 802.15.4 망의 동적 백오프 조정 기법에 대한 연구

다국어 초록 (Multilingual 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.

목차 (Table of Contents)

• Abstract
• Ⅰ. 서론
• Ⅱ. 실시간 혼합 데이터 전송을 위한 슈퍼프레임 구조의 설계
• Ⅲ. 비주기적 긴급 메시지 데이터 전송 기법
• Ⅳ. 컴퓨터 시뮬레이션
• Ⅴ. 결론 및 향후과제
• 참고문헌

참고문헌 (Reference)

1 A. Willig, "Wireless technology in industrial network" 93 (93): 2005

2 K. Koumpis, "Wireless industrial control and monitoring beyond cable replacement" 2005

3 M.Maury, "Realtime communications over IEEE 802.11e in industrial environments" 2005

4 M. Petrova, "Performance Study of IEEE 802.15.4 Using Measurements and Simulations" 487-492, 2006

5 IEEE 802.15.4 Standard-2003, "Part 15.4: Wireless Medium Access Control(MAC) and Physical Layer(PHY) Specifications for Low-Rate Wireless Personal Area Networks(LR-WPANs)" 2003

6 F. De Pellegrini, "On the Use of Wireless Networks at Low Level of Factory Automation Systems" 2 (2): 129-143, 2006

7 L.-C. Ko, "Design and Implementation of IEEE 802.15.4 Beacon-enabled Network Devices" 13-17, 2006

8 A. Koubaa, "A comprehensive simulation study of slotted CSMA/CA for IEEE 802.15.4 wireless sensor networks" 183-192, 2006