FIELD: physics, communications.
SUBSTANCE: invention relates to means of controlling access to a transmission medium for controlling access of a busbar user station, having first and second channels, to a second busbar channel shared by multiple user stations. The first channel is opened for exclusive access by a user station during at least one time interval for granting access, the beginning of which is defined by the user station through bitwise arbitration of the first channel, the end of which is defined once the user station frees it again after successful arbitration of the first channel. Access to the second channel shared by multiple user stations is controlled so as to open the second channel for access by the user station only during said time interval for granting access without separate arbitration to obtain access to the second channel.
EFFECT: high volume of transmitted data without deterioration of system performance in real time.
13 cl, 5 dwg
