Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Tramsmission Method of Periodic and Aperiodic Real-Time Data on a Timer-Controlled Network for Distributed Control Systems

분산제어시스템을 위한 타이머 제어형 통신망의 주기 및 실시간 비주기 데이터 전송 방식

  • 문홍주 (한국전력공사 전력연구원 원전계전그룹) ;
  • 박홍성 (강원대학교 전기전자정보통신공학부)
  • Published : 2000.07.01
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Abstract

In communication networks used in safety-critical systems such as control systems in nuclear power plants there exist three types of data traffic : urgent or asynchronous hard real-time data hard real-time periodic data and soft real-time periodic data. it is necessary to allocate a suitable bandwidth to each data traffic in order to meet their real-time constraints. This paper proposes a method to meet the real-time constraints for the three types of data traffic simultaneously under a timer-controlled token bus protocol or the IEEE 802.4 token bus protocol and verifies the validity of the presented method by an example. This paper derives the proper region of the high priority token hold time and the target token rotation time for each station within which the real-time constraints for the three types of data traffic are met, Since the scheduling of the data traffic may reduce the possibility of the abrupt increase of the network load this paper proposes a brief heuristic method to make a scheduling table to satisfy their real-time constraints.

Keywords

References

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