Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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FlexRay: Protocol, Time Hierarchy, Message Frame, Communication Controller, and Conformance Test

FlexRay: 프로토콜, 시간 계층, 메시지 프레임, 커뮤니케이션 컨트롤러, 적합성 시험

  • Seokjun Hahn (School of Electronic Engineering and Department of Intelligent Semiconductor, Soongsil University) ;
  • Sua Shin (School of Electronic Engineering and Department of Intelligent Semiconductor, Soongsil University) ;
  • Naeun Park (School of Electronic Engineering and Department of Intelligent Semiconductor, Soongsil University) ;
  • Chan Park (School of Electronic Engineering and Department of Intelligent Semiconductor, Soongsil University) ;
  • Daegi Lee (School of Electronic Engineering and Department of Intelligent Semiconductor, Soongsil University) ;
  • Seongsoo Lee (School of Electronic Engineering and Department of Intelligent Semiconductor, Soongsil University)
  • Received : 2023.12.18
  • Accepted : 2023.12.22
  • Published : 2023.12.31
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Abstract

FlexRay is an in-vehicle network with maximum two channels and maximum transmission speed of 10Mbps per channel. FlexRay exploits TDMA (Time Division Multiple Access) and FTDMA (Flexible Time division Multiple Access) to ensure real-time communication with efficient transmission, so it is used for real-time electronic control of safety-critical vehicular modules such as powertrain. This paper explains FlexRay protocol, time hierarchy, message frame, communication controller, and conformance test in detail based on ISO 17458 standard and FlexRay consortium documents.

FlexRay는 차량 내 네트워크(In-Vehicle Network)로 최대 2개의 채널로 각 채널당 최대 10Mbps 전송 속도를 가진다. FlexRay는 TDMA(Time Division Multiple Access)와 FTDMA(Flexible Time division Multiple Access) 방식을 사용하여 효율적으로 데이터를 전송하면서도 실시간 통신을 보장하기 때문에 파워트레인 등 안전성이 필수적인 차량 모듈의 실시간 전자 제어에 사용된다. 본 논문에서는 ISO 17458 표준과 FlexRay 컨소시엄 문서를 바탕으로 FlexRay의 프로토콜(Protocol), 시간 계층(Time Hierarchy), 메시지 프레임(Message Frame), 커뮤니케이션 컨트롤러(Communication Controller), 적합성 시험(Conformance Test)에 대해 자세히 설명한다.

Keywords

Acknowledgement

This work was supported by the R&D Program of the Ministry of Trade, Industry, and Energy (MOTIE) and Korea Evaluation Institute of Industrial Technology (KEIT). (20023805, RS-2022-00154973, RS-2023-00232192)

References

  1. ISO 11898-1:2015, "Road Vehicles-Controller Area Network (CAN)-Part 1: Data Link Layer and Physical Signaling," https://www.iso.org/standard/63648.html
  2. ISO 11898-1:2015, "Road Vehicles-Controller Area Network (CAN)-Part 1: Data Link Layer and Physical Signaling," https://www.iso.org/standard/63648.html
  3. ISO 17458-1:2013, "Road Vehicles-FlexRay Communications System-Part 1: General Information and Use Case Definition," https://www.iso.org/standard/59804.html
  4. ISO 17458-2:2013, "Road Vehicles-FlexRay Communications System-Part 2: Data Link Layer Specification," https://www.iso.org/standard/59806.html
  5. ISO 17458-3:2013, "Road Vehicles-FlexRay Communications System-Part 3: Data Link Layer Conformance Test Specification," https://www.iso.org/standard/59807.html
  6. ISO 17458-4:2013, "Road Vehicles-FlexRay Communications System-Part 4: Electrical Physical Layer Specification," https://www.iso.org/standard/59808.html
  7. ISO 17458-5:2013, "Road Vehicles-FlexRay Communications System-Part 5: Electrical Physical Layer Conformance Test Specification," https://www.iso.org/standard/59809.html
  8. FlexRay Consortium, "FlexRay Communications System Protocol Specification, Version 3.0.1," 2010.
  9. FlexRay Consortium, "FlexRay Communications System Electrical Physical Layer Specification Version 3.0.1," 2010.
  10. FlexRay Consortium, "FlexRay Communications System Protocol Conformance Test Specification Version 3.0.1," 2010.
  11. FlexRay Consortium, "FlexRay Preliminary Node-Local Bus Guardian Specification Version 2.0.9," 2010.
  12. ISO/IEC 9646-1:1994, "Information Technology-Open Systems Interconnection-Conformance Testing Methodology and Framework," https://www.iso.org/standard/17473.html