SU1095218A1 - Method of distributing standard time signals via communication lines with variable propagation time - Google Patents

Abstract

METHOD OF TRANSMITTING SIGNALS OF EXACT TIME BY A LOSE line of 25 Hz impellance a.). . Prma I /// f iOSpat. OK. Ofatn is insensitive (I m 1 Ztalonn I of CONNECTION WITH VARIABLE DISTRIBUTION TIME on bus St. 858058, characterized in that, in order to increase the information content, at each intermediate point, the moments of reception of the same fronts of each binary pulse transmitted in forward and in the opposite direction, and form a time signal at the time corresponding to the middle of the interval between the same edges of binary pulses. WMC i (L co el HCHE 00

Description

The invention relates to communication technology and can be used to transmit accurate time signals over channels and communication lines with variable parameters.

According to the main author. St. No. 858058 is known a method of transmitting accurate time signals over communication lines with variable propagation time and a device for implementing it. According to a known method, time signals in the form of binary code pulse sequences are cyclically transmitted over a communication line with a lead time equal to the propagation time of signals from the transmitter to the receiver. In this case, binary pulse code sequences are transmitted with interruptions exceeding twice their propagation time in the communication line, and the lead time is corrected by continuously averaging the deviation (fluctuation) time of the propagation time of all pulses paging through the communication line. The transmission of code sequences from transmitter to receiver and back is carried out on the same two-wire link 1.

The aim of the invention is to increase the information content.

This goal is achieved by the fact that, according to the method, at each intermediate point, the moments of reception of the same fronts of each binary pulse transmitted in the forward and backward directions are fixed, and an exact time signal is generated at the time corresponding to the middle of the interval between the same

fronts of binary pulses.

The drawing shows diagrams of sequences of operations in the implementation of the method, when the time interval between the received combinations of the same name following in the forward and reverse

directions, manager (for example, 20 ms) or more than the specified one (diagrams a and b), respectively.

The proposed method involves using for extracting time signals at intermediate points of the line LINE of pulses in the forward and backward directions, and determining times that are equally spaced from these sysials, as well as averaging the binary fluctuations of 1x pulses of which the transmitted In-line signals, separately for each direction, which allows the selection of exact Efemenia signals at any point of the two-wire communication line, over which the signals are transmitted. The information content of the proposed method is higher, since, in contrast to the known om, it allows to provide T

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Claims (1)

METHOD FOR TRANSMITTING EXACT TIME SIGNALS BY LINE COMMUNICATIONS WITH VARIABLE DISTRIBUTION TIME by ed. St. No. 858058, characterized in that, in order to increase information content, the moments of reception of the same fronts of each binary pulse transmitted in the forward and reverse directions are recorded at each intermediate point, and an accurate time signal is generated at the moment corresponding to the middle of the interval between the same edges of binary pulses . Sequences of impulses 25G and a.) M <2ms. *. Direct ί ~ 1 ^ drift ~ _ I --- rrd ___ G ~) I1. iBMXOff Bp I L__t ± _ Reference! L 00ns -ί 20ms Inverse / Inverse δ)? > 20 mc Straight ΓΣ ~ Ί ___E The odd inverse p Γ ~ Σ ~ 1 Llrz. Pp output L ___ t ± i Reference L____I____ □ ΓΠ • f ί t i t SU,.,. 1095218