System, apparatus and method for implementing transparent transmission clock in accurate clock synchronization protocol

A technology of accurate clock synchronization and transparent clock transmission, which is applied in the direction of synchronization devices, transmission systems, digital transmission systems, etc., can solve the problems of synchronization accuracy jitter, constraints, etc., and achieve the effects of improving accuracy, improving feasibility, and saving hardware development time

Active Publication Date: 2009-04-08
ZTE CORP
View PDF0 Cites 41 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, routing and switching devices generally use software to implement the IEEE 1588 protocol and obtain time stamp related information, which has certain uncertainty and volatility, and the synchronization accuracy will be severely restricted by software jitter.

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
  • System, apparatus and method for implementing transparent transmission clock in accurate clock synchronization protocol
  • System, apparatus and method for implementing transparent transmission clock in accurate clock synchronization protocol
  • System, apparatus and method for implementing transparent transmission clock in accurate clock synchronization protocol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0041] see figure 1 , this figure shows the structure of the transparent transmission clock device in the present invention, the device has two modes of operation, input and output (when the external network inputs a message to the device, the device is in the input mode; the device outputs the message to the external network , the device is in the output working mode), including: a message identification module, a message processing module, a message buffer module, and an output control module connected in sequence; module;

[0042] The message identification module is used for receiving messages and identifying IEEE1588 protocol event messages therein. Since Ethernet frame data encapsulates IP data, IP data encapsulates UDP data, and UDP encapsulates PTP protocol messages, it can first identify whether it is an IEEE1588 protocol through releva...

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

The invention discloses a system, a device and a method thereof for realizing an unvarnished transmission clock in a precise clock synchronization protocol. In the method, when a route switching device receives messages which are input from external network, an IEEE1588 protocol event message is recognized by an unvarnished transmission clock device and a time stamp of the input time is written into the message; when the route switching device outputs messages to the external network, the time stamp of the input time of the IEEE1588 protocol event message is extracted by another unvarnished transmission clock device and a time stamp of a preset fixed delay time is rewritten into the message. With the input time regarded as the reference time, the message is output after the fixed delay time is delayed. With the system, the device and the method adopted, precise time stamp can be obtained. The synchronous time precision is improved. And the unvarnished transmission clock device can be directly applied to current route switching devices. The hardware developing time is saved. The supporting feasibility on PTP protocol under the condition of current experiment is improved.

Description

technical field [0001] The present invention relates to the technical field of synchronizing routing and switching equipment in Ethernet, and in particular to a transparent PTP protocol (Precision Time Protocol, Precision Time Protocol) based on IEEE 1588 (precision clock synchronization protocol standard for network measurement and control systems). System, device and method for clock transmission. Background technique [0002] With the development of network technology, in distributed communication systems or data processing systems, there are high requirements for the time synchronization of its system groups. PTP is a clock synchronization protocol defined by IEEE 1588, which is used for sub-microsecond synchronization of clocks in sensors, actuators and other terminal devices in standard Ethernet or other distributed bus systems using multicast technology. The precise network synchronization protocol defined by IEEE 1588 achieves a high degree of synchronization in the...

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
IPC IPC(8): H04L12/56H04L29/08H04L7/00H04L12/755
Inventor 陈红旗郭欣周昶翟红健
Owner ZTE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap