Calibration method and optical network unit of uplink wavelength channel of passive optical network system

A passive optical network and wavelength channel technology, which is applied in transmission monitoring/testing/fault measurement systems, etc., can solve problems such as increased cost, difficult industrial production, and low detection signal transmission power, so as to improve network service quality and reduce complexity sexual effect

Active Publication Date: 2020-04-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the second method also brings a relatively large disadvantage, mainly in the PON network, in order to prevent the detection signal from causing crosstalk to the data signal, the transmission power of the detection signal is kept very low, which greatly increases the OLT receiver capabilities, technically difficult to achieve and industrially produced
And if the ONU uses low frequency to send data, additional low frequency filtering and modulation devices need to be added, and the cost will also increase

Method used

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  • Calibration method and optical network unit of uplink wavelength channel of passive optical network system
  • Calibration method and optical network unit of uplink wavelength channel of passive optical network system
  • Calibration method and optical network unit of uplink wavelength channel of passive optical network system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0111] There are multiple TWDM channels in the TWDM PON system, each TWDM channel corresponds to a TWDM channel terminal and a group of ONUs, each TWDM channel corresponds to a downlink wavelength channel, and corresponds to one or more uplink wavelength channels. Different TWDM channels correspond to different downlink wavelength channels and different uplink wavelength channels. The OLT command is connected to each ONU in the PON system to work on a certain TWDM channel. The ONU uses the downlink wavelength channel corresponding to the above TWDM channel to receive downlink data, and uses the uplink wavelength channel corresponding to the above TWDM channel to send uplink data. After the ONU is powered on, if the ONU does not have a downstream wavelength calibration record, the ONU tunes its own receiving wavelength from low to high, or from high to low. The corresponding relationship between the current TWDM channel or the current downlink wavelength identifier completes th...

Embodiment approach 2

[0125] There are multiple TWDM channels in the TWDM PON system, each TWDM channel corresponds to a TWDM channel terminal and a group of ONUs, each TWDM channel corresponds to a downlink wavelength channel, and corresponds to one or more uplink wavelength channels. Different TWDM channels correspond to different downlink wavelength channels and different uplink wavelength channels. The OLT command is connected to each ONU in the PON system to work on a certain TWDM channel. The ONU uses the downlink wavelength channel corresponding to the above TWDM channel to receive downlink data, and uses the uplink wavelength channel corresponding to the above TWDM channel to send uplink data. After the ONU is powered on, if the ONU does not have a downstream wavelength calibration record, the ONU tunes its own receiving wavelength from low to high, or from high to low. The corresponding relationship between the current TWDM channel or the current downlink wavelength identifier completes th...

Embodiment approach 3

[0140]There are multiple TWDM channels in the TWDM PON system, each TWDM channel corresponds to a TWDM channel terminal and a group of ONUs, each TWDM channel corresponds to a downlink wavelength channel, and corresponds to one or more uplink wavelength channels. Different TWDM channels correspond to different downlink wavelength channels and different uplink wavelength channels. The OLT command is connected to each ONU in the PON system to work on a certain TWDM channel. The ONU uses the downlink wavelength channel corresponding to the above TWDM channel to receive downlink data, and uses the uplink wavelength channel corresponding to the above TWDM channel to send uplink data. After the ONU is powered on, if the ONU does not have a downstream wavelength calibration record, the ONU tunes its own receiving wavelength from low to high, or from high to low. The corresponding relationship between the current TWDM channel or the current downlink wavelength identifier completes the...

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Abstract

The invention discloses a calibration method for uplink wavelength channels of PON and an ONU. The calibration method comprises that the ONU calibrates the uplink wavelength channels according to the sequence of the uplink wavelength channels and / or the sequence of related values of the uplink wavelength channels, and uplink wavelength channels and / or related values thereof are ordered from high to low or from low to high to form the sequence. Thus, the uplink wavelength is calibrated.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method for calibrating an uplink wavelength channel of a passive optical network (Passive Optical Network, PON for short) system and an optical network unit. Background technique [0002] With the development of network technology, the network can be used to transmit a large number of voice, data, video and other services, so the requirements for bandwidth are constantly increasing, and PON is produced under this demand. The topology of the PON system is as follows figure 1 As shown, the PON system usually consists of an optical line terminal (Optical Line Terminal, referred to as OLT) at the office side, an optical network unit (Optical Network Unit, referred to as ONU) at the user side, and an optical distribution network (Optical Distribution Network, referred to as ODN). Composition, usually using a point-to-multipoint network structure. ODN consists of single-mode optic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/07
Inventor 耿丹张德智张伟良
Owner ZTE CORP
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