PON ONU Activation via Dedicated Wavelength
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Solution Overview
Problem
Transmission delays in Passive Optical Networks (PON) occur due to the need for a quiet window during ONU activation, which affects normal ONU communication and can lead to signal attenuation when using an optical splitter for Dedicated Activation Wavelength (DAW) channels.
Innovation Solution
The proposed solution involves an ONU activation method where a first OLT in an existing system activates a new-system ONU through a DAW channel, acquires activation information, and sends it to a second OLT in a new system, bypassing the need for an optical splitter and reducing signal attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a quiet window is opened by OLT for ONU activation, then ONU activation can be performed, but transmission delay occurs for normal ONU communication
Solution Approach 1:
The patent divides the activation process into two separate channels: a dedicated activation channel (DAW) for ONU activation and a service channel for normal communication. This segmentation allows activation operations to occur without blocking service traffic, eliminating the transmission delay caused by quiet windows while ensuring reliable ONU activation.
2Adaptability or versatility
If optical splitter is used for DAW channel, then activation channel is established, but signal attenuation of about 3 dB occurs
Solution Approach 1:
The patent extracts the activation function from the service channel and establishes a dedicated activation wavelength (DAW) channel. By taking out the activation traffic and separating it from service traffic, the system avoids using optical splitters for activation signals, thereby eliminating the 3 dB signal attenuation that would otherwise occur while still providing adaptability for dual-channel operations.
Data Source
AI summary
Embodiments of the present disclosure provide an activation method, an activation device, a control device, a network device and an optical network system. A new-system ONU is activated on a first OLT in an existing system, and then activation information of the new-system ONU is sent to a second OLT in a new system by the first OLT or by an activation agent ONU which has been activated on the second OLT, thereby enabling activation of the new-system ONU on the second OLT.