V. Soldatov
National Scientific Centre “Institute of Metrology”, Myronosytska Str., 42, Kharkiv, 61002, Ukraine
time.metrology@ukr.net
Abstract
The article deals with the issues of time synchronization using the Internet protocols NTP and PTP. These issues
are considered as an example of the state of affairs and the prospects of development of the Service of Universal Time
and Reference Frequencies (hereinafter referred to as the Time and Frequency Service) in terms of the dissemination of
time and frequency via the Internet and increase of the reliability and immunity of the entire system as a whole. With the
development of information technology and communication systems 3G, 4G, 5G, network synchronization has become unreliability of this technology. The problem is that the signal from the satellite is very weak, and it is extremely easy to
muffle it with generating noise at the same frequency. At the same time, as the needs increase, the bandwidth of existing
NTP and PTP servers will not be able to process all requests. This requires a major reorganization and implementation of
organizational measures, such as: firstly, the rendering of the nodes of time synchronization with UTC (UA) by Ukraine’s
national measurement standard of time, and secondly, the development of NTP and PTP servers controlled by the Time
and Frequency Service of Ukraine as an alternative to GPS synchronization, that is the best way to develop the Time and
Frequency Service.
Keywords: control and correction stations; measurement standard of time and frequency; time scale; NTP and PTP
protocols; network synchronization; GPS principles; GPS active interference system.
more important than ever before. The need for synchronization for some sectors of the economy has come close to existing
possibilities. Today, there are several options for device synchronization in Ukraine: via the Internet, using PTP, NTP, and
locally using GNSS. The latter option provides high-precision synchronization up to 40 ns, but has a major disadvantage:
poor noise immunity. According to some experts, our dependence on GPS is becoming very dangerous, given the extreme