The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Implementation of IEEE1588 for Clock Synchronization

CAN 네트워크의 시간동기를 위한 IEEE1588 구현

  • 박성원 (경북대학교 전자공학부 고신뢰성 임베디드 제어 시스템 연구실) ;
  • 김인성 (경상공업고등학교 지능형로봇과) ;
  • 이동익 (경북대학교 전자공학부 고신뢰성 임베디드 제어 시스템 연구실)
  • Received : 2014.02.04
  • Accepted : 2014.02.21
  • Published : 2014.02.28
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Abstract

In this paper, an IEEE1588 based clock synchronization technique for CAN (Controller Area Network) is presented. Clock synchronization plays a key role to the success of a networked embedded system. Recently, the IEEE1588 algorithm making use of dedicated chipsets has been widely adopted for the synchronization of various industrial applications using Ethernet. However, there is no chipset available for CAN. This paper presents the implementation of IEEE1588 for CAN, which is implemented using only software and CAN packets without any dedicated chipset. The proposed approach is verified by the comparison between the estimated synchronization precision with a simple model and the measured precision with experimental setup.

본 논문에서는 CAN(Controller Area Network)의 시간동기를 위한 IEEE1588 알고리즘의 구현에 관한 연구결과를 제시한다. 시간동기는 네트워크 기반 임베디드 시스템의 안정성, 효율, 신뢰성 개선 측면에서 매우 중요하다. 최근 전용 칩을 이용하는 IEEE1588 표준이 Ethernet 기반 임베디드 시스템의 시간동기에 폭넓게 적용되고 있다. IEEE1588과 같은 표준화된 시간동기 기법은 기존의 'in-house' 시간동기 기법에 비해 많은 장점들을 제공하지만, CAN을 위한 IEEE1588 전용 칩은 현재까지 상용화된 제품을 찾아보기 어렵다. 본 논문에서는 전용 칩을 사용하지 않고 소프트웨어와 CAN 메시지만을 이용하여 IEEE1588 알고리즘을 구현한다. 제안된 방법의 효용성을 확인하기 위해 간단한 모델을 이용하여 추정한 동기정밀도와 실험용 네트워크를 통해 측정한 동기정밀도를 비교분석 한다.

Keywords

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