Unlock instant, AI-driven research and patent intelligence for your innovation.

Frequency offset detection method and device

A frequency offset detection and frequency offset technology, which is applied in the field of communication and can solve the problems of inaccurate detection results of reference clock signals.

Active Publication Date: 2017-06-27
HUAWEI TECH CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a frequency offset detection method and device to solve the problem in the prior art that the detection result of the frequency offset of the reference clock signal is inaccurate due to the frequency offset of the local crystal oscillator itself and the parameter drift caused by aging.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Frequency offset detection method and device
  • Frequency offset detection method and device
  • Frequency offset detection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0080] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0081] figure 1 It is a flow chart of the frequency offset detection method provided by Embodiment 1 of the present invention. The method in this embodiment is applicable to the case of performing frequency offset detection on a reference clock signal in an SDH synchronous network. The method is executed by a frequency offset detection device co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Embodiments of the present invention provide a frequency offset detection method and device. The frequency offset detection method of the present invention includes: calibrating the frequency offset of the clock signal output by the local crystal oscillator of the network element equipment, and performing frequency offset detection on the tracked reference clock signal through the clock signal output by the calibrated local crystal oscillator. The embodiment of the present invention solves the problem in the prior art that the detection result of the frequency offset of the reference clock signal is inaccurate due to the frequency offset of the local crystal oscillator itself and the parameter drift caused by aging, and realizes the problem of inaccurate detection of the frequency offset of the reference clock signal without replacing the hardware. Improve detection accuracy.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a frequency offset detection method and device. Background technique [0002] The synchronous digital sequence (Synchronous Digital Hierarchy, referred to as SDH) network adopts a hierarchical master-slave synchronization method, that is, a single reference clock (Primary Reference Clock, referred to as PRC) is used to control the synchronization of the entire network through the synchronization link of the synchronization distribution network. The SDH network uses a A series of hierarchical clocks, each level of clock is synchronized with its upper level clock or the same level clock. The current-level network element equipment in the SDH network uses the clock signal transmitted by the upper-level network element equipment it tracks as a reference clock signal, and continues to transmit the reference clock signal to its lower-level network element equipmen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06H04J3/14
CPCH04J3/0691H03L7/07H04L7/0037H04L7/042
Inventor 刘旺刘永亮
Owner HUAWEI TECH CO LTD