ONU Bandwidth Map Extraction for Real-Time PON Analysis
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Solution Overview
Problem
Existing equipment is expensive, specialized, and limited in capability for directly accessing and analyzing bandwidth maps in optical distribution networks, making it difficult to debug and optimize new technologies like 25G PON systems.
Innovation Solution
Implementing a method and apparatus on the ONU to extract and collect upstream transmission opportunities and Alloc-IDs from layer-2 headers in downstream frames, allowing for real-time analysis and processing of bandwidth allocation data without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional monitoring methods are used, then bandwidth allocation can be monitored, but direct and easy access to bandwidth maps is lacking
Solution Approach 1:
The patent extracts bandwidth map information from the layer-2 header of downstream frames and outputs it as a separate layer-3 payload. This extraction allows the ONU to access bandwidth allocation data directly without complex monitoring systems, resolving the contradiction between ease of access and system complexity.
Solution Approach 2:
The ONU is enhanced to perform multiple functions: it processes downstream frames for normal operation while simultaneously extracting and outputting bandwidth map data. This multi-functionality allows a single device to provide both network operation and monitoring capabilities, improving ease of access without adding separate complex monitoring equipment.
2Measurement precision
If additional monitoring devices are deployed, then bandwidth allocation analysis capability is improved, but system cost and complexity increase
Solution Approach 1:
The ONU is enhanced to perform multiple functions: it processes downstream frames for normal operation while simultaneously extracting and outputting bandwidth map data. This multi-functionality allows a single device to provide both network operation and monitoring capabilities, improving ease of access without adding separate complex monitoring equipment.
Solution Approach 2:
The patent creates a copy of the bandwidth map information from the layer-2 header and transmits it as a layer-3 payload. This copying mechanism allows analysis devices to obtain precise bandwidth allocation data without requiring direct access to the OLT or complex monitoring infrastructure, improving measurement precision while maintaining simple system configuration.
3Productivity
If bandwidth maps are captured continuously, then real-time analysis is enabled, but data processing load increases
Solution Approach 1:
The patent extracts only the essential bandwidth map information from the layer-2 header and outputs it as a compact layer-3 payload. This selective extraction reduces the volume of data that needs to be processed and transmitted, enabling real-time analysis while minimizing the processing power and energy consumption required.
Data Source
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AI summary
A method for collecting data, the method comprising, at an ONU of an optical distribution network: receiving downstream data packets in a downstream frame, each downstream data packet including a layer-2 header comprising at least upstream transmission opportunities and corresponding Alloc-ID's, wherein each Alloc-ID identifies a T-CONT of an ONU of the optical distribution network, wherein the upstream transmission opportunities define upstream bandwidth allocation for the T-CONT of the ONU; extracting at least part of the upstream transmission opportunities and their corresponding Alloc- IDs from the layer-2 headers; and collecting the at least part of the upstream transmission opportunities and the corresponding Alloc-ID for transmission as a layer-3 output payload.