Method and device making it possible to synchronize a master station and one or more subscriber stations in a wireless communications network, comprising at least one processor disposed at the level of each of the subscriber stations and suitable for calculating each subscriber's transmit time adjustment by taking account of the rate of variation of the satellite-subscriber path, a master station side processor suitable for measuring the loop error and a processor suitable for comparing the value of the error with a threshold value and as soon as the loop error value for a subscriber station is less than or equal to the threshold value, for giving said subscriber station permission to send its traffic.