PON Wavelength Indication for Reliable Upstream ONU Transmission

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Solution Overview

Problem

In passive optical network systems, ONUs accessing a 50GPON OLT cannot determine the upstream wavelength option used by the OLT, leading to conflicts with conventional PON systems when transmitting SN PLOAM messages, reducing communication reliability.

Innovation Solution

A method for transmitting wavelength indication information from a first communication node to a second node, allowing the second node to determine the appropriate wavelength for transmission and either mute or switch to the indicated wavelength to avoid conflicts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the ONU continuously transmits SN PLOAM messages to respond to SN windows, then the ONU remains in O2 to O3 state and attempts to communicate, but this causes upstream conflicts with conventional PON systems when wavelength mismatch occurs

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidupstream conflict with conventional PON system

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The OLT performs preliminary action by announcing the upstream wavelength option to the ONU before the ONU starts transmitting SN PLOAM messages. This allows the ONU to know in advance which wavelength to use, preventing wavelength mismatch conflicts with conventional PON systems before they occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback by having the OLT announce the upstream wavelength option to the ONU. This feedback mechanism allows the ONU to adjust its transmission wavelength according to the OLT's configuration, preventing conflicts with conventional PON systems that operate on different wavelengths.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If the ONU uses a wavelength that matches the conventional PON network, then the ONU can communicate with conventional PON OLT, but this causes the ONU to be received or processed incorrectly by the 50GPON OLT or cause conflicts

Engineering Contradiction:

Improvewavelength compatibilityVSAvoidmessage transmission reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system applies local quality by having different wavelength options (option1: 1260-1280nm, option2: 1290-1310nm, option3: 1284-1288nm) available for different operational contexts. The OLT announces which local wavelength quality the ONU should use, ensuring the ONU transmits on the correct wavelength for the specific network environment.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The OLT performs preliminary action by announcing the upstream wavelength option to the ONU before communication begins. This preliminary information allows the ONU to configure its transmission wavelength correctly, preventing both types of conflicts: with conventional PON systems and with the 50GPON OLT.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260082143A1Methods for transmitting and receiving information, communication nodes, and storage medium

Publication Date: 2026.03.19 ZTE CORP

AI summary

Embodiments of the present disclosure provide methods for transmitting and receiving information, a communication node, and a storage medium. The transmitting method includes: transmitting, by a first communication node, wavelength indication information to a second communication node, where the wavelength indication information is for indicating a wavelength that the second communication node should use when transmitting information to the first communication node.