US Patent 7953009 Vehicle communication method and communication device

In a vehicle communication method in which communication between a plurality of communication devices is performed and an amount of communication data sent from each communication device is changed, features are as follows. That is, if the amount of communication data sent from the first communication device is to be increased, the amount of communication data sent from the second communication device is decreased so that a total sum of the amounts of communication data sent from all the communication devices does not exceed a predetermined value.