FIELD: radio engineering, communication.
SUBSTANCE: method for time synchronisation of a digital subscriber line (DSL) involves transmitting, by a first apparatus, a first symbol to a second apparatus, and obtaining time Ts2 indicating the moment when the first symbol is transmitted; receiving, by the first apparatus, a second symbol transmitted by the second apparatus, and obtaining time Ts1 indicating the moment when the second symbol is received; obtaining, by the first apparatus, time Tm2 indicating the moment when the first symbol is received by the second apparatus and time Tm1 indicating the moment when the second symbol is transmitted by the second apparatus; calculating, by the first apparatus, an offset between a clock generator of the first apparatus and a clock generator of the second apparatus according to the times Ts1, Ts2, Tm1, Tm2; and adjusting, by the first apparatus, the clock generator of the first apparatus with the offset to achieve synchronisation with the clock generator of the second apparatus, wherein the times Ts1, Ts2, Tm1 and Tm2 correspond to transmitting/receiving sampling in the initial position of the first or second symbols.
EFFECT: high accuracy of time synchronisation.
25 cl, 8 dwg
