Data transfer method in a restraint system connected to a bus line

A method for performing a data transmission in a vehicle-occupant restraint system connected through a bus line, a central control unit and a plurality of data processing units being coupled to the bus line, the central control unit and the plurality of data processing units triggering restraint devices at locations in a vehicle, the method comprising the steps of:

• transmitting data of a high priority and a high time-related urgency with a high signal level and a high bit rate;
• transmitting data of a lower priority and a lower time-related urgency with a low signal level and a low bit rate;
• transmitting data of the high priority and the lower time-related urgency with the high signal level and the low bit rate;
• and
• transmitting data of the lower priority and the high time-related urgency with the low signal level and the high bit rate.