Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Fault-tolerant clock synchronization for low-cost networked embedded systems

저비용 네트워크 기반 임베디드 시스템을 위한 시간동기 기술

  • Lee, Dong-Ik (School of Electrical Engineering and Computer Science, Kyungpook National University)
  • 이동익 (경북대학교 전자전기컴퓨터학부)
  • Published : 2007.01.31
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Abstract

Networked embedded systems using the smart device and fieldbus technologies are now found in many industrial fields including process automation and automobiles. However the discrepancy between a node's view of current time and the rest of the system can cause many difficulties in the design and implementation of a networked system. To provide a networked system with a global reference time, the problem of clock synchronization has been intensively studied over the decades. However, many of the existing solutions, which are mainly developed for large scale distributed computer systems, cannot be directly applied to embedded systems. This paper presents a fault-tolerant clock synchronization technique that can be used for a low-cost embedded system using a CAN bus. The effectiveness of the proposed method is demonstrated with a set of microcontrollers and DC motor-based actuators.

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