IN-VEHICLE COMMUNICATION SYSTEM, AND COMMUNICATION CONTROL METHOD IN IN-VEHICLE COMMUNICATION SYSTEM

An in-vehicle communication system includes: electronic control devices; communication transmission paths; a transmission path switch; and a network control device, the network control device includes: a control communication unit performing a control communication with the transmission path switch; and a control communication management unit managing an operation of the control communication in the control communication unit, each of the electronic control device includes: a data communication unit performing a data communication with another of the electronic control devices; and a data communication management unit managing an operation of the data communication in the data communication unit, and the control communication management unit and the data communication management unit manage the respective operations of the control communication unit and the data communication unit, such that the control communication and the data communication are performed on the communication transmission paths in different time periods.