Communication system and communication control method

Abstract

Provided is a communication system including: a first communication bus available for communication of at least a first communication scheme; a second communication bus available for both communication of the first communication scheme and communication of a second communication scheme having a lower processing load than the first communication scheme; a plurality of first communication devices connected to both the first communication bus and the second communication bus; a plurality of second communication devices, connected to the second communication bus, which perform communication through the second communication scheme using the second communication bus; and a processor that detects an abnormality of the first communication bus, wherein each of the plurality of first communication devices performs communication through the first communication scheme using the first communication bus in a case where the abnormality of the first communication bus is not detected by the processor, and performs communication through the first communication scheme using the second communication bus in a case where the abnormality of the first communication bus is detected by the processor.