Patent ID: 7953009

Claim:
A vehicle communication method in which communication between a plurality of communication devices is performed, wherein the plurality of communication devices include a first communication device and a second communication device, comprising: determining beforehand the total sum of the amounts of communication data per unit time sent from all the communication devices that does not exceed a predetermined value of communication data, executing a process by each of the communication devices at predetermined time intervals, in which if an amount of communication data per unit time sent from the first communication device is increased, an amount of communication data per unit time sent from the second communication device is decreased so that a total sum of the amounts of communication data per unit time sent from all the communication devices does not exceed a predetermined value, receiving, via a reception device, data output patterns ordered by a higher-level device, the data output patterns being notified by the second communication device, and detecting, via an equality detection device, whether the data output patterns notified by the second communication device are substantially equal, wherein when the equality detection device detects that the data output patterns are substantially equal, a data output pattern switching device changes the amount of communication data.