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Method for implementing time synchronization of telecommunication network node equipment and apparatus thereof

A node equipment, time synchronization technology, applied in the field of telecommunications, can solve the problems of low precision, poor safety and economy, poor reliability and safety, etc., and achieve the effect of high practicability and economic value

Inactive Publication Date: 2012-12-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has high precision, it is not safe and economical.
[0007] (3) In the public switched telephone network (PSTN, Public Switched Telephone Network), the automatic time adjustment of the program-controlled telephone exchange is realized through the standard time label provided by the network management system from the time server. This method has low precision, and reliability and bad security

Method used

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  • Method for implementing time synchronization of telecommunication network node equipment and apparatus thereof
  • Method for implementing time synchronization of telecommunication network node equipment and apparatus thereof
  • Method for implementing time synchronization of telecommunication network node equipment and apparatus thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] For the Beijing time code carried in analog mode, the device used to realize the time synchronization of telecommunication network node equipment is as follows: figure 2 As shown, the device 200 includes an integrated high-frequency front end 210 (built-in intermediate frequency amplifier 2101), a TV signal graphic-text receiving decoder 220, a CPU (80C51) 230, a memory 240, and a dedicated interface 250; wherein, the TV signal graphic-text receiving decoding The device 220 includes a video signal detector 2201 , a sync signal separator 2202 , a line sync counter 2203 and a video decoder 2204 .

[0061] The integrated high-frequency front-end 210 down-converts the analog TV high-frequency carrier signal (CATV-in) into an intermediate frequency video carrier signal. signal) into the video signal detector 2201 for detection, and the detected signal is sent to the video decoder 2204; the other way is sent into the sync signal separator 2202 to separate the parity field sy...

Embodiment 2

[0065] For the Beijing time carried in digital form, the device used to realize the time synchronization of the node equipment of the telecommunication network is as follows: image 3 As shown, the device 300 includes an integrated high-frequency front-end 310 , a TV signal image-text receiving decoder 320 , a CPU 330 , a memory 340 and a dedicated interface 350 .

[0066] Among them, the integrated high-frequency front-end 310 down-converts the digital TV high-frequency carrier signal into an intermediate-frequency video carrier signal, and sends it to the TV signal graphic-text receiving decoder 320 after being amplified. This embodiment adopts the TVP5147 video digital signal processing chip of IT company (But other video digital signal processing chips can also be used).

[0067] The TV signal image-text receiving decoder 320 first converts the digital video carrier signal through A / D, and then performs quadrature amplitude modulation (QAM, Quadrature Amplitude Modulation)...

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Abstract

The invention discloses a device for realizing the time synchronization between telecommunication network node equipment. The device comprises an integrated high-frequency front end, a television signal graphics context receiving decoder, a controller, a memory and an interface connected with the controller, which are orderly connected, wherein the integrated high-frequency front end is provided inside with an intermediate-frequency amplifying circuit, which converts the television high-frequency carrier wave signal into the intermediate-frequency video carrier wave signal by the down conversion; the television signal graphics context receiving decoder processes the intermediate-frequency video carrier wave signal to obtain all types of information carried by the video data stream, and demodulates and decodes the Beijing standard time signal broadcasted in the sixteenth line at the field blanking intervals; the controller reads out the time code by decoding and stores and outputs the time code by the interface. In the invention, the highly accurate Beijing standard time is easily and economically acquired from the television broadcasting signal, and the synchronizing precision, the safety and the stability can be ensured at the same time.

Description

technical field [0001] The invention relates to time synchronization technology in the field of telecommunication, in particular to a method and device for realizing time synchronization of telecommunication network node equipment. Background technique [0002] With the rapid development of the telecommunication network, the data flow speed of the channel is getting faster and faster, the content of the telecommunication network service is more and more abundant, and the real-time information requirement is getting higher and higher. Therefore, the time (moment) synchronization requirement of each node device in the network becomes more and more important. [0003] Since the local time (moment) of the network node equipment is not uniform or the accuracy is not enough, various problems will arise in the telecommunications network. For example, authentication and billing issues, consistency of local and long distance billing systems, tracking of signaling by the telecom mana...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/54H04N7/025
Inventor 吴跃庭
Owner ZTE CORP