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Passive optical network (PON) wavelength assignment method, device and system

A passive optical network, wavelength allocation technology, applied in the field of optical network, can solve the problem of ONU unable to access PON network, laser aging wavelength, change and other problems, to achieve the effect of ensuring successful access to PON network

Active Publication Date: 2013-06-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] All ONUs need to work at the initial wavelength state. If the initial operating wavelength of the ONU is uncertain, the wavelength changes due to laser aging, and if the ONU fails, the optical transmitter and / or optical receiver cannot work at the operating wavelength or part of the wavelength. Then the ONU will not be able to access the PON network

Method used

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  • Passive optical network (PON) wavelength assignment method, device and system
  • Passive optical network (PON) wavelength assignment method, device and system
  • Passive optical network (PON) wavelength assignment method, device and system

Examples

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example 1

[0069] Such as image 3 As shown, the initial working wavelength of the ONU cannot be determined, and the working wavelength is determined through the following steps to complete the registration activation, including:

[0070] Step 300: The OLT starts the ONU registration process synchronously on all supported downstream wavelengths, and prepares to receive the registration response message of the ONU on all upstream wavelengths, and broadcasts the sequence number request message synchronously on all downstream wavelengths;

[0071] according to figure 2 In the process shown, the OLT will synchronously broadcast an upstream overhead (upstream_overhead) message, an extended burst length (Extended_Burst_length) message (this message is optional) and a serial number request (Serial_Number request) message on each downstream wavelength channel.

[0072] Step 301: the ONU to be registered responds to the serial number request, sends its serial number to the OLT, and reports the ...

example 2

[0094] The initial working wavelength of the ONU cannot be determined, and the working wavelength is determined through the following steps to complete the registration activation, such as Figure 4 As shown, it specifically includes the following steps:

[0095] Step 400: OLT synchronously starts the ONU registration process on all supported downstream wavelengths, prepares to receive ONU registration response messages on all upstream wavelengths, and broadcasts serial number request messages synchronously on all downstream wavelengths;

[0096] according to figure 2As shown, the OLT will synchronously broadcast an upstream overhead (upstream_overhead) message, an extended burst length (Extended_Burst_length) message (this message is optional) and a serial number request (Serial_Number request) message on each downstream wavelength channel.

[0097] Step 401: the ONU to be registered sends the optical transmitter and / or optical receiver information to the OLT, and sends the...

example 3

[0107] The initial working wavelength of the ONU cannot be determined, and the working wavelength is determined through the following steps to complete the registration activation, such as Figure 5 The process shown in , as an example, specifically includes the following steps:

[0108] Step 500: The OLT starts the ONU registration process synchronously on all supported downstream wavelengths, prepares to receive ONU registration response messages on all upstream wavelengths, broadcasts multiple available wavelength information synchronously on all downstream wavelengths, and Synchronous broadcast sequence number request message on wavelength;

[0109] according to figure 2 In the process shown, the OLT will synchronously broadcast an upstream overhead (upstream_overhead) message, an extended burst length (Extended_Burst_length) message (this message is optional) and a serial number request (Serial_Number request) message on each downstream wavelength channel.

[0110] The...

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PUM

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Abstract

The embodiment of the invention relates to a passive optical network (PON) wavelength assignment method in the technical field of optical communication, which comprises the following steps: using an optical line terminal (OLT) for starting the registration process of an optical network unit (ONU), and determining the temporary working wavelength used in the registration process for the ONU, wherein the temporary working wavelength is the wavelength which is temporarily used before the ONU sets the OLT to assign the working wavelength during the registration process of the ONU; and using the OLT for assigning the working wavelength for the ONU, carrying the assigned working wavelength on the temporary working wavelength and sending to the ONU, thereby facilitating the setting of an opticaltransmitter and / or an optical receiver of the ONU according to the assigned working wavelength. The embodiment of the invention further provides a passive optical network (PON) wavelength assignment device and a system. The embodiment of the invention can realize that the ONU can access into a PON network without using the fixed initial working wavelength, thereby effectively ensuring the successful access of the ONU into the PON network.

Description

technical field [0001] The present invention relates to the technical field of optical networks, in particular to a PON wavelength allocation method, device and system. Background technique [0002] As the cost of a Passive optical network (PON, Passive optical network) drops sharply, the PON is getting more and more attention from operators. Among them, Gigabit-capable PON (GPON) is a main PON access technology for point-to-multipoint transmission. [0003] The GPON system mainly includes: an optical line terminal (OLT, Optical Line Terminator) placed in the operator's central office (CO, Central Office), a remote node (RN, Remote Node) composed of a power splitter (splitter) and An optical network unit (ONU, Optical Network Unit) placed at the user end. The downlink data of the OLT is transmitted to each ONU through Time Division Multiplexing (TDM, Time Division Multiplexing), and each ONU receives its own downlink data according to the identifier in the downlink data. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04B10/25H04J14/02
Inventor 叶飞杨素林
Owner HUAWEI TECH CO LTD