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Colorless onu and method and pon system for calibrating alternate operating wavelengths

A technology of working wavelength and wavelength, which is applied to the selection device of multiplexing system, transmission monitoring/testing/fault measurement system, electrical components, etc. experience good results

Active Publication Date: 2018-11-30
CHINA TELECOM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, when the colorless ONU calibrates the backup wavelengths, it must first interrupt the normal business, and then switch the optical transceiver to these backup wavelengths for calibration, which will affect the normal business of users, and the service experience is relatively poor.

Method used

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  • Colorless onu and method and pon system for calibrating alternate operating wavelengths
  • Colorless onu and method and pon system for calibrating alternate operating wavelengths
  • Colorless onu and method and pon system for calibrating alternate operating wavelengths

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Embodiment Construction

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0018] figure 1 is a schematic diagram of the TWDM PON system of the present invention. Such as figure 1 As shown, the TWDM PON system includes several colorless ONUs 102 and OLTs 104 . Include multiple groups of transceivers in the OLT104, each group of transceivers includes a pair of transmitters and receivers, each group of transceivers is connected to the wavelength division multiplexer through different OLT ports, and the uplink and downlink wavelengths used by different OLT ports are different for each Not the same, several colorless ONUs 102 are connected to OLT 104 through optical splitters. The OLT 104 can provide the colorless ONU 102 with newly-added standby working wavelength information in the current network, and the colorless ONU 102 can calibrate the standby...

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Abstract

The invention discloses a colorless ONU and a method thereof for carrying out calibration on standby working wavelength and a PON system, and relates to the field of an optical access network. The method comprises the following steps: a colorless ONU sends a dormancy application to an OLT according to service load conditions of itself; after receiving a dormancy permission notification sent by the OLT, the colorless ONU decides whether to carry out calibration on newly-added standby working wavelength; if determining to carry out calibration on the newly-added standby working wavelength, the colorless ONU carries out calibration on newly-added standby working wavelength, and then, enters a dormancy mode; and if determining not to carry out calibration on the newly-added standby working wavelength, the colorless ONU enters the dormancy mode directly, and decides whether to carry out calibration on the newly-added standby working wavelength when the next dormancy process begins. The colorless ONU carries out calibration on the standby working wavelength before entering dormancy, so that normal service of the colorless ONU does not need to be interrupted, and user service experience is good.

Description

technical field [0001] The present invention relates to the field of optical access networks, in particular to a colorless ONU (optical network unit) and a method for calibrating a standby working wavelength thereof and a TWDM (time division wavelength division multiplexing) PON (passive optical access network) system . Background technique [0002] The TWDM PON system is different from the traditional time division multiplexing PON system. TWDM PON adds a new service dimension by introducing wavelength division multiplexing technology. In the TWDM PON system, the uplink and downlink wavelength pairs used by different OLT (optical line terminal) ports are different, and each ONU is colorless. The so-called colorless ONU means that the optical transceiver wavelength of the ONU is also tunable. It can work under any OLT port as required. [0003] The wavelength tunable feature of the colorless ONU enables it to work at any working wavelength. However, in actual deployment, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/07H04Q11/00
Inventor 金嘉亮蒋铭沈成彬
Owner CHINA TELECOM CORP LTD
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