Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Passive optical network data collection method based on secondary sampling

A passive optical network and data acquisition technology, applied in the field of communication, can solve the problems of difficult management and maintenance, low timing accuracy, and high networking cost, and achieve the effects of easy expansion, small acquisition error, and high time transmission accuracy.

Active Publication Date: 2016-04-06
南京智汇电力技术有限公司
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are more or less problems in the traditional synchronous data acquisition (for example, the area protection of the intelligent distribution network system) communication technology, especially when multiple hosts need to sample the synchronous data, it is required to maintain time synchronization between the hosts The relationship between traditional time synchronization technologies such as IRIG-B code time synchronization with GPS / Beidou as the reference time, 1PPS time synchronization based on the second pulse or IEEE-1588 time synchronization based on Ethernet, although these methods can complete time synchronization, but There are problems such as low time synchronization accuracy, poor reliability, difficult management and maintenance, and high networking costs

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
  • Passive optical network data collection method based on secondary sampling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Because generally speaking the clock that the ONU end carries out AD (AnalogtoDigital) conversion is the respective local clock of ONU, so each ONU end obtains at different times by the sampling data that AD converts, and is asynchronous, therefore, in the present invention , in order to get the sampling data at the same time at the ONU side, we send the time information to each ONU side through the OLT, and the ONU side uses the unified time information to get the second sampling time, so that the ONU side gets the second sampling time. Based on the time information sent by the OLT, the synchronization of each ONU is realized. Specifically, as figure 1 Shown is a schematic flow chart of the PON data acquisition method based on subsampling in the present invention, including the following steps:

[0026] The S1OLT periodically generates synchronization time information according to the first local clock counter. Specifically, here the OLT uses the first local clock 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

The present invention discloses a passive optical network data collection method based on secondary sampling. The method comprises the following steps that: an OLT periodically generates synchronization time information according to a first local clock counter; the OLT carries out ranging on an ONU, obtains a loop time delay and sends the time delay to the ONU; the ONU outputs synchronization sampling pulse according to received time information; the ONU latches the value of a second local clock counter at the rising edge of the synchronization sampling pulse; the sampling values of N periods before the synchronization sampling pulse are obtained through cache; the ONU sends the values to an interpolation module to carry out interpolation operation to obtain a synchronization sampling interpolation result and outputs the interpolation result at the falling edge of the synchronization sampling pulse, the result can be sent to an ONU local processor to carry out processing to realize data synchronous acquisition and transmission, the establishment of a time synchronization relation among multiple passive optical networks is not needed according to the provided method, the independent sampling frequency can be employed by each passive optical network, and stable and reliable synchronization collection data is obtained.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a data collection method of a passive optical network. Background technique [0002] Passive Optical Network (PON) system is a new type of optical fiber access network technology that appeared in the early 1990s. It is a typical point-to-multipoint transmission. The central office equipment (optical line terminal, OLT) and multiple users The network connected by the Optical Distribution Network (ODN) composed of passive optical cables, optical splitters / combiners, etc. , Flexible and convenient application. [0003] The work of the existing information collection and communication system mainly depends on multi-point data information and unified and accurate time reference information in the system, especially for a large number of synchronous data collection and transmission in the system, which requires synchronization, real-time and reliability. However, there are more...

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 Applications(China)
IPC IPC(8): H04Q11/00H04J3/06
Inventor 臧佳赵志中
Owner 南京智汇电力技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products