Communication Channel Modeling and Capacity Analysis of Controller Area Network (CAN)

Abstract

Controller area network (CAN) has been widely used for in-vehicle networks. The demand of data rate of in-vehicle network has risen sharply, while traditional CAN communication cannot support this demand of data rate with limited bandwidth around DC. To overcome the limitation, passband communication systems can be considered where wider bandwidth may be available. In order to use the passband, we need to understand and analyze the CAN communication channel. However, since real measurement of the channel response takes so much time and efforts, it will be convenient if channel modeling of CAN communication system is available. In this paper, we perform modeling of passband CAN communication systems by using a transmission matrix and a cascade of two port network methods. Instead of real measurement, we expect to reduce the time and efforts significantly to obtain a passband CAN communication channel response by using the channel modeling result. Using channel modeling result, we suggest the bridge tap length and bandwidth for suitable designing passband CAN system. Furthermore, using channel modeling and noise measurement results described in this paper, we perform capacity analysis of each channel state in order to know maximum throughput of the system. ⓒ 2015 DGIST