System of transmitting information between a central station and sub-stations

Abstract

The system for transmitting information between a central station (SP) and sub-stations (SS1, SS2, SS3) operates, for the transmission from the sub-stations to the central station in accordance with a method (TDMA method) which consists in providing time slots in each of which only one sub-station can transmit, the arrangement of these time slots being determined by a synchronizing signal transmitted via a link from the central station to the substations; this system is characterized in that it comprises at the sub-station ends delay adjustment means (MR1, MR2, MR3 . . . ) so as to ensure that the transmission from the sub-stations will be properly situated in the time slots assigned to them, while at the central station end it comprises means (MMR) for measuring the transmission delay between the sub-stations and the central station and in that the said link between the central station and the sub-stations has for its function to transmit, inter alia, the delay measurement information while the means (PR1, PR2, PR3) receiving the said measurement information provided in the sub-stations are used to act on the said adjusting means.

Dependencies are inferred from the claim text.