Benchmark reference clock system with high reliability and high performance

Abstract

The invention discloses a benchmark reference clock system with high reliability and high performance. Time frequency signals can be traced in various modes, particularly the general GNSS one-way timeservice is not mainly used any more; optical fiber time service, precise real-time single-point positioning, carrier phase, satellite common view, high-performance PTP and other technologies are fused; real-time performance correction data is received, tracing in various modes is realized by combining a precise time signal regulation and control device and functions in the system, so that the reliability of the time service system is improved, the common problem that satellite signals are easily interfered is overcome, the time service precision is obviously improved from the current 30ns orabove to the sub-nanosecond level, and the frequency accuracy reaches E-13 or above. The system provided by the invention realizes a novel PRTC and ePRTC equipment system with high precision, high reliability and low cost, and can be widely applied to network timing and a source part of a synchronous network.

Description

technical field [0001] The invention belongs to the field of communication synchronous network, in particular to a time frequency reference clock system. Background technique [0002] The reference master clock PRTC device refers to the device that uses the time input signal from UTC to provide one or more types of time and frequency output functions, and has a timekeeping function. PRTC is an independent communication synchronization device. The enhanced reference master clock ePRTC is higher than PRTC in terms of performance. Typical PRTCs and ePRTCs provide a reference signal for time, phase and frequency synchronization to other clocks within the network or part of the network. In particular, PRTC and ePRTC can also provide reference signals to the Telecom Master Clock (T-GM) of the network node where they are located. There are many technical standards on reference clocks at home and abroad, such as ITU-T G.811 "Timing Characteristics of Reference Clocks", ITU-T G.827...

AI Technical Summary

Problems solved by technology

[0006] However, the existing PRTC, ePRTC and other equipment in the industry are mainly based on satellite one-way time service, which are susceptible to interference and low reliability, and the time service accuracy can only reach tens of nanoseconds

Existing patent technology discloses timing equipment using optical fiber timing technology, but the technical method is relatively single and the reliability is not high

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