| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication system and communication method in which each of a plurality of electronic control units can communicate through one twisted pair wire at various communication speeds without using a repeater, and the electronic control unit included in the communication system. <P>SOLUTION: Each of ECU 3a, 3b, 3c, and 3d connected to a twisted pair wire 2 communicates at one or a plurality of communication speeds of 500 kbps and 125 kbps. Each of the ECU 3a, 3b, 3c, and 3d generates a signal obtained by modulating amplitude of a carrier of a frequency band corresponding to the communication speed, and outputs the generated signal to the twisted pair wire 2. Each of the ECU 3a, 3b, 3c, and 3d extracts one or a plurality of signals of signals having a frequency band of 22 to 27 MHz corresponding to the communication speed of 500 kbps and signals having a frequency band of 7 to 11 MHz corresponding to the communication speed of 125 kbps from the signals propagated through the twisted pair wire 2, and detects the extracted signals. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
