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

A communication network and time synchronization technology, applied in the direction of time division multiplexing system, multiplexing communication, electrical components, etc., can solve the problems of single time service means, large environmental impact, and satellite navigation system susceptible to interference, etc., to achieve Guarantee the effect of high synchronization, safety and reliability

Active Publication Date: 2018-11-06
武汉中元通信股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0019] Example 1:

[0020] like figure 1 As shown, Embodiment 1 of the present invention provides a communication network timing method based on a PTP time synchronization signal, including the following steps:

[0021] Step S1, generating an initial clock frequency signal, and generating a local initial PPS signal according to the initial clock frequency signal;

[0022] Step S2, obtain the master clock PPS signal, and compare the master clock PPS signal with the local initial PPS signal, adjust the initial clock frequency signal according to the comparison result, obtain a standard clock frequency signal, and according to the standard clock frequency signal Generate a local calibration PPS signal;

[0023] Step S3, dividing the frequency of the standard clock frequency signal to obtain a frequency-divided clock frequency signal, and dividing the frequency of the frequency-dividing clock frequency signal again to obtain a high-precision clock frequency signal;

[0024] S...

Example Embodiment

[0047] Example 2:

[0048] like figure 2 As shown, Embodiment 2 of the present invention provides a communication network timing system based on a PTP time synchronization signal, including a constant temperature crystal oscillator module U1, an FPGA module U2, a CPU module U3 and an Ethernet module U4; the constant temperature crystal oscillator module U1 passes through the The FPGA module U2 is electrically connected to the CPU module U3, and the FPGA module U2 is electrically connected to the Ethernet module U4 through the CPU module U3;

[0049] The constant temperature crystal oscillator module U1 is used to generate a standard clock frequency signal and send it to the FPGA module U2;

[0050] The FPGA module U2 is configured to generate a local calibration PPS signal according to the standard clock frequency signal, and divide the standard clock frequency signal to obtain a frequency-divided clock frequency signal;

[0051] The Ethernet module U4 is used to divide t...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): H04J3/06
CPCH04J3/0667
Inventor 李格张阳钟斌飞程晓畅姚洁
Owner 武汉中元通信股份有限公司
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