Communication network time service method and system based on PTP time synchronization signal

Abstract

The invention discloses a communication network time service method based on a PTP time synchronization signal. The method comprises the following steps: step S1, producing an initial clock frequencysignal, and generating a local initial PPS signal according to the initial clock frequency signal; step S2, acquiring a main clock PPS signal, and comparing the main clock PPS signal with the local initial PPS signal, regulating the initial clock frequency signal according to a comparison result so as to obtain a standard clock frequency signal, and generating a local check PPS signal according tothe standard clock frequency signal; step S3, performing frequency division on the standard clock frequency signal to obtain a frequency-dividing clock frequency signal, and preforming the frequency-division on the frequency-dividing clock frequency signal to obtain a high-precision clock frequency signal; and step S4, producing a PTP clock synchronization message timestamp according to the high-precision clock frequency signal and the local check PPS signal, and analyzing the PTP clock synchronization message timestamp to produce the local time. The method and system disclosed by the invention have the technical effect of being high in reliability and synchronization.

Description

technical field [0001] The invention relates to the technical field of communication timing, in particular to a communication network timing method and system based on a PTP time synchronization signal. Background technique [0002] In the design process of the traditional frequency hopping radio, it is limited by the low-precision temperature compensation crystal, which makes the establishment time of the frequency hopping communication network relatively long, and the synchronization maintaining time is relatively short, and the synchronization information needs to be continuously sent during the communication process. The network overhead is increased; the traditional frequency hopping radio station has a long recovery time from the silent state to the combat state; the multi-level networking time is long, which cannot meet the requirements of the frequency hopping radio network establishment time and synchronization maintenance time. Therefore, a communication network ti...

AI Technical Summary

Problems solved by technology

However, the time service equipment of the Beidou / GPS-based communication network is completely dependent on the space-based satellite navigation system, and the time service method is single. Once the satellite navigation system is unavailable, the external time reference will be lost immediately. security risk

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