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A Study on Distributed Message Allocation Method of CAN System with Dual Communication Channels

중복 통신 채널을 가진 CAN 시스템에서 분산 메시지 할당 방법에 관한 연구

  • 김만호 (부산대학교 기계공학부) ;
  • 이종갑 (부산대학교 기계공학부) ;
  • 이석 (부산대학교 기계공학부) ;
  • 이경창 (부경대학교 제어계측공학과)
  • Received : 2010.03.29
  • Accepted : 2010.07.13
  • Published : 2010.10.01

Abstract

The CAN (Controller Area Network) system is the most dominant protocol for in-vehicle networking system because it provides bounded transmission delay among ECUs (Electronic Control Units) at data rates between 125Kbps and 1Mbps. And, many automotive companies have chosen the CAN protocol for their in-vehicle networking system such as chassis network system because of its excellent communication characteristics. However, the increasing number of ECUs and the need for more intelligent functions such as ADASs (Advanced Driver Assistance Systems) or IVISs (In-Vehicle Information Systems) require a network with more network capacity and the real-time QoS (Quality-of-Service). As one approach to enhancing the network capacity of a CAN system, this paper introduces a CAN system with dual communication channel. And, this paper presents a distributed message allocation method that allocates messages to the more appropriate channel using forecast traffic of each channel. Finally, an experimental testbed using commercial off-the-shelf microcontrollers with two CAN protocol controllers was used to demonstrate the feasibility of the CAN system with dual communication channel using the distributed message allocation method.

Acknowledgement

Supported by : 한국연구재단

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