Vehicle communication system, a communication error monitoring method of in-vehicle communication system, and the in-vehicle communications system communication error monitoring program of

摘要

PROBLEM TO BE SOLVED: To reduce a monitoring load of monitoring means for monitoring a state of a network.SOLUTION: An in-vehicle communication system mounted on a vehicle includes: a plurality of units of information processing means connected with a network for periodically outputting pieces of data to the network; and monitoring means for determining data output by the respective units of information processing means in the shortest period from among the pieces of data periodically output to the network by the respective units of information processing means, and monitoring whether or not the data output in the shortest period is output to the network, and thereby detecting communication abnormality of the in-vehicle communication system.