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

Time synchronization device and method for automatically detecting optical fiber asymmetry

A time synchronization device and asymmetric technology, applied in the field of communication, can solve problems such as poor time synchronization accuracy

Active Publication Date: 2014-06-04
ZTE CORP
View PDF7 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of poor time synchronization accuracy caused by bidirectional length asymmetry in the related art, the present invention provides a time synchronization device and method for automatically detecting optical fiber asymmetry to at least solve the above problems

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
  • Time synchronization device and method for automatically detecting optical fiber asymmetry
  • Time synchronization device and method for automatically detecting optical fiber asymmetry
  • Time synchronization device and method for automatically detecting optical fiber asymmetry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] In this embodiment, the time synchronization device for automatically detecting optical fiber asymmetry is divided into an optical module device, an OTDR asymmetry detection device, a delay compensation module, a time correction module, and a 1588 protocol module, wherein the optical module device, 1588 The protocol module belongs to a part of the time synchronization device for automatically detecting optical fiber asymmetry. The OTDR asymmetry detection device, time delay compensation module, and time synchronization correction module belong to the content of this patent and will be mainly described.

[0147] To realize automatic detection of bidirectional fiber asymmetry, first ensure that the system clocks of the network elements (Master / Slave) at both ends are in a state of frequency synchronization. On this basis, the Master and Slave network elements send and receive messages at the same frequency, and the Slave side extracts asymmetric delay data, performs two-wa...

Embodiment 2

[0161] Figure 8 It is a flow chart of a scheme for automatically detecting optical fiber asymmetry according to Embodiment 2 of the present invention, such as Figure 8 As shown, the specific steps of the solution for automatic detection of optical fiber asymmetry include:

[0162] Step S801, Master side: initiate a 1588 protocol message. The packet is normally processed by the optical module and sent to the Slave end.

[0163] Step S802, Slave side: receiving the 1588 protocol message, recording the time stamp, and replying the message. The packets are normally processed by the optical module and sent to the Master end at the normal service packet wavelength.

[0164] Step S803, Slave end: the controller initiates an OTDR optical fiber asymmetry delay detection, and the OTDR asymmetry detection device sends an OTDR optical pulse. On-line detection of bidirectional asymmetric delay of optical fiber.

[0165] Step S804, Slave end: learn the asymmetric time delay of the bi...

Embodiment 3

[0169] Figure 9 It is the Slave end OTDR optical fiber asymmetric delay detection flow chart of embodiment 3 of the present invention, as Figure 9 As shown, the specific steps include:

[0170] In step S901, the controller initiates an OTDR optical fiber asymmetry delay detection, and the OTDR asymmetry detection device sends the detection wavelength, and records the OTDR detection light pulse transmission time t11 at the same time.

[0171] OTDR optical pulses can be sent in one direction, such as sending OTDR asymmetry detection optical pulses only on the fiber sending side or fiber receiving side; they can also be sent in two directions, such as sending OTDR asymmetry on both the fiber sending side and receiving fiber side Detect light pulses.

[0172] Step S902, multiplex optical pulses of different wavelengths (normal service message optical pulses and OTDR asymmetry detection optical pulses) via the WDM wavelength division multiplexing device, and send them to the pe...

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 provides a time synchronization device and method for automatically detecting optical fiber asymmetry. The device comprises an OTDR asymmetry detection module, a time delay compensation module and a time synchronization correction module. The OTDR asymmetry detection module comprises: a transmitting unit for transmitting a detection signal to an optical fiber; a receiving unit for receiving the detection signal returned by the optical fiber; a transmission time delay determination unit for determining the detection signal transmission time delay of the detection signal in the optical fiber according to the time difference between the detection signal transmitting time and the returned detection signal receiving time, and determining the service signal transmission time delay of a service signal in the optical fiber according to the detection signal transmission time delay; a time delay compensation module for calculating the asymmetry time delay between a first optical fiber and a second optical fiber according to the service signal transmission time delay of the first optical fiber and the service signal transmission time delay of the second optical fiber; and a time synchronization correction module for performing time synchronization correction according to the asymmetry time delay. According to the scheme, the time synchronization accuracy can be improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a time synchronization device and method for automatically detecting optical fiber asymmetry. Background technique [0002] Due to the needs of wireless TDD services for time synchronization, 1588 time synchronization based on synchronous Ethernet has gradually become the mainstream technology of time synchronization technology in the communication industry. [0003] In the existing network, due to various reasons such as the error of the fiber core of the optical cable, the error of the connection of the optical cable construction, the error of the connection of the cable fault, and the error of the pigtail, the bidirectional length of the optical fiber may be asymmetrical, resulting in bidirectional asymmetry of the transmission delay. The current network data shows that the probability of the time error caused by optical fiber asymmetry is greater than 100 ns. Therefore, when buildin...

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): H04B10/071H04B10/25H04L7/00
CPCH04B10/071H04J3/0667H04B10/25H04L7/0075
Inventor 徐健新何力夏靓
Owner ZTE CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com