The invention relates to a method for controlling
data transmission in a data network (2) of a vehicle (1), which comprises a
bus system (20) with a
bus (22), a plurality of control units (ECU1 - ECUm), and a central
control unit (21). The method is characterized in that the
data transmission in the data network (2) takes place according to a
transmission protocol that uses a transmission model with
time windows (30), and the method comprises the following steps, which are carried out at the central
control unit (21): - Monitoring of
data transmission in the data network (2) by the central
control unit (21), - Determining information about data transmission, - Adjusting the
time windows (30) based on the information obtained, - Generating a customized time slot table (32) with the customized time slots (30), and - Transmission of the adapted time window table (32) to all control units (ECU1 - ECUm) of the
bus system (20). In addition, a bus
system (20) and a vehicle (1) are described.