METHOD AND DEVICE FOR DETECTING DATA COLLISION IN OPTICAL DATA BUS

摘要

In an asychronously operating optical data bus: (a) data collisions are detected via two analog comparators by amplitude evaluation if the input optical power fluctuations at the site of a receiver as a function of all transmitters do not exceed approximately 3 dB; or (b) at first only one or more transmitting subscribers detect collisions and communicate this to other subscribers by one or more JAM signals; or (c) each subscriber interrogates, during the time which corresponds to its bus turn-around time, whether in its receiver, data signals are arriving from the bus.