A Method of Realizing Synchronous Data Acquisition Based on Passive Optical Network

A passive optical network and synchronous data technology, applied in the field of communication, can solve the problems of poor stability and reliability of synchronous sampling and data interaction, high networking costs, difficult management and maintenance, etc., and achieve high time transfer accuracy, high bandwidth, The effect of high communication bandwidth

Active Publication Date: 2019-03-01
南京智汇电力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional data acquisition and communication technologies such as PLC, RS232 optical modem, RS485 serial bus, microwave, GSM / CDMA / 3G, B code or GPS time synchronization, etc., even the emerging industrial Ethernet switch technology and WIMAX technology in recent years There are certain defects, mainly manifested in the poor stability and reliability of synchronous sampling and data interaction; difficult management and maintenance; high networking costs, etc.

Method used

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  • A Method of Realizing Synchronous Data Acquisition Based on Passive Optical Network
  • A Method of Realizing Synchronous Data Acquisition Based on Passive Optical Network
  • A Method of Realizing Synchronous Data Acquisition Based on Passive Optical Network

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Embodiment 1

[0029] like figure 1 , 2 Described, a kind of method based on passive optical network realizes synchronous data acquisition, comprises the following steps:

[0030] (1) In the PON host, by sharing the clock or clock synchronization method, each passive optical network realizes the synchronization between the OLT and the OLT of the passive optical network based on a unified clock counter;

[0031] (2) The optical line terminal OLT of the passive optical network performs distance measurement on the optical network unit ONU to obtain the loop transmission delay, and generates a synchronous data acquisition time stamp under the pulse of the reference clock counter at the OLT end;

[0032] (3) OLT issues synchronous data acquisition time information to each ONU, including the time and synchronous data acquisition time stamp of sending synchronous data acquisition information to different ONUs;

[0033] (4) The ONU generates a synchronous data acquisition pulse according to the is...

Embodiment 2

[0036] like figure 1 , 3 Described, a kind of method based on passive optical network realizes synchronous data acquisition, comprises the following steps:

[0037] (1) In the PON host, by sharing the clock or clock synchronization method, each passive optical network realizes the synchronization between the OLT and the OLT of the passive optical network based on a unified clock counter;

[0038] (2) The optical line terminal OLT of the passive optical network performs distance measurement on the optical network unit ONU to obtain the loop transmission delay, and generates a synchronous data acquisition time stamp under the pulse of the reference clock counter at the OLT end;

[0039] (3) OLT issues synchronous data acquisition time information to each ONU, including loop delay and synchronization time;

[0040] (4) The ONU generates synchronous data acquisition pulses according to the issued time information; the OLT only issues the loop time delay RTT and synchronization t...

Embodiment 3

[0043] like figure 1 , 4 Described, a kind of method based on passive optical network realizes synchronous data acquisition, comprises the following steps:

[0044] (1) In the PON host, by sharing the clock or clock synchronization method, each passive optical network realizes the synchronization between the OLT and the OLT of the passive optical network based on a unified clock counter;

[0045] (2) The optical line terminal OLT of the passive optical network performs distance measurement on the optical network unit ONU to obtain the loop transmission delay, and generates a synchronous data acquisition time stamp under the pulse of the reference clock counter at the OLT end;

[0046] (3) OLT issues synchronous data acquisition time information to each ONU, including the time and synchronous data acquisition time stamp of sending synchronous data acquisition information to different ONUs;

[0047] (4) The ONU generates a synchronous data acquisition pulse according to the issu...

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Abstract

The present invention discloses a method for realizing synchronization data acquisition based on a passive optical network. Multiple passive optical networks are in one PON host or multiple PON hosts, through the method of clock sharing or clock synchronization, the synchronization among passive optical networks is realized, and a unified clock counter is ensured between an OLT and an OLT. With a passive optical network as a communication media, based on the cyclical synchronization data acquisition time stamp of an OLT reference clock counter, by using ranging and time delay compensation technology, the synchronization data collection by the ONUs of the passive optical networks at the same time is realized, thus the whole network synchronization data collection is realized, and the method has high time transfer precision. The e synchronization data is transferred to the ONU local processor for processing, or according to different application requirements, a suitable communication protocol is customized, after the protocol is completed, the synchronization data is packaged and is uploaded through a fiber network for processing, and the method has the advantages of reliable transmission and high communication bandwidth.

Description

technical field [0001] The invention belongs to the technical field of communication, and mainly relates to a method for synchronous data collection in wireless communication, in particular to a method for realizing synchronous data collection based on a passive optical network. Background technique [0002] The passive optical network (PON) system is a new type of optical fiber access network technology that appeared in the early 1990s, and is a typical point-to-multipoint transmission network. Compared with active optical access technology or Ethernet technology, PON eliminates the active equipment between the central office and the user end, which makes maintenance simple, high reliability, low cost, and can save fiber resources. It is the future The main solution for optical fiber access network. [0003] The synchronous data acquisition communication system relies on the synchronous sampling of multi-point electrical quantity information of the system and the reliable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06H04Q11/00
Inventor 刘智兵臧佳
Owner 南京智汇电力技术有限公司
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