Optical Network Unit Registration via Power-Based Grouping
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Solution Overview
Problem
Current Passive Optical Network (PON) systems face challenges in meeting low-delay demands due to the need for large quiet windows during ONU registration, which delays low-delay services like virtual reality and 5G wireless services.
Innovation Solution
The proposed solution involves an OLT grouping ONUs based on receiving optical power values and allocating corresponding uplink bandwidths to different groups, allowing ONUs to send registration information using specific bandwidths, thereby reducing the quiet window size and ensuring timely data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large quiet window is used during ONU registration to accommodate all possible distances, then all ONUs can be registered, but the registration delay increases excessively
Solution Approach 1:
The patent divides the ONU registration process into multiple groups based on receiving optical power values. Each group is assigned a specific time slot within the quiet window for registration. This segmentation allows the system to register all ONUs while significantly reducing the required quiet window size compared to accommodating all ONUs simultaneously, thereby resolving the contradiction between registration completeness and registration delay.
2Loss of time
If a small quiet window is used to reduce registration delay, then low-delay services can be transmitted faster, but ONUs with certain receiving optical power values cannot be registered
Solution Approach 1:
The patent dynamically adjusts the allocation of time slots within the quiet window based on the receiving optical power values of different ONUs. By measuring the actual optical power and assigning appropriate time slots, the system optimizes the quiet window utilization, ensuring that all ONUs can be registered while keeping the window size minimal, thus resolving the contradiction between registration delay and registration completeness.
Data Source
AI summary
The present disclosure provides a ranging method and a registration method for an optical network, an Optical Line Terminal (OLT), an Optical Network Unit (ONU), and an optical network system. An OLT groups ONUs controlled by the OLT according to receiving optical power values of the ONUs. The OLT allocates corresponding uplink bandwidths to the ONUs in different groups, the uplink bandwidths being used to send registration information by the ONUs to be registered.