PON Wavelength Indication for Upstream Conflict Avoidance
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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 wavelength mismatches occur, causing communication reliability issues.
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
Engineering Contradiction Analysis
1Reliability
If the ONU continuously transmits SN PLOAM messages to respond to SN opening windows, then the ONU can maintain its state and attempt to communicate, but this causes upstream wavelength conflicts with conventional PON systems when wavelength mismatches occur
Solution Approach 1:
The OLT performs preliminary action by announcing the upstream wavelength option through broadcast messages (such as GEMC or PLOAM messages) before the ONU begins transmitting SN PLOAM messages. This allows the ONU to know in advance which wavelength option the OLT supports, preventing wavelength conflicts before they occur. The wavelength option information is included in the broadcast messages sent during the initial communication setup phase.
2Ease of operation
If the ONU does not know which upstream wavelength option the OLT supports, then the ONU cannot determine the correct transmission wavelength, but announcing this information requires additional communication mechanisms
Solution Approach 1:
The invention reuses existing broadcast message types (GEMC or PLOAM messages) that are already part of the standard communication protocol, adding wavelength option information to these existing messages. This approach allows the system to convey additional information without introducing entirely new message types or communication mechanisms, maintaining ease of operation while providing necessary wavelength selection capabilities.
Data Source
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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 used for indicating a wavelength to be used when the second communication node transmits information to the first communication node.