Patent ID: 8571007

Claim:
A method for synchronizing two communication networks of an electronic data-processing system, one or more respective nodes being connected to each of the two communication networks, the method comprising: establishing for each of the two communication networks a respective time schedule, each of the time schedules defining at least one respective time slot for a respective synchronization message, the respective synchronization message time slots of the two communication networks coinciding; on a first of the communication networks, generating, by one of the nodes of the first communication network, the respective synchronization message of the first communication network for a selected synchronization message time slot; and on a second of the communication networks, providing the respective synchronization message of the second communication network for the selected synchronization message time slot as a function of the respective synchronization message of the first communication network for the selected synchronization message time slot; wherein providing the respective synchronization message of the second communication network for the selected synchronization message time slot includes transferring a switch that connects the first and second communication networks into a closed state when the selected synchronization time slot of the first communication network is present.