Passive Optical Network Path Identifiers for Flexible Upstream Wavelengths
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Solution Overview
Problem
Conventional passive optical network (PON) technologies face challenges in flexibly indicating upstream wavelength paths, leading to inefficient bandwidth utilization and increased costs due to the need for pre-stored binding relationships between downstream and upstream wavelength paths.
Innovation Solution
A communication method that allows flexible indication of upstream wavelength paths in a PON system by using downstream frames with path identifiers, enabling separate transmission of upstream service data and registration requests without pre-stored bindings, thus improving bandwidth utilization and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pre-stored binding relationships between downstream and upstream wavelength paths are used, then the system structure is simple, but the flexibility of indicating upstream wavelength paths is reduced and bandwidth utilization is inefficient
Solution Approach 1:
The patent extracts the binding relationship information from the system structure and embeds it directly into downstream frames as path identifier fields. This allows the upstream wavelength path indication to be carried within the data stream itself rather than requiring pre-configured external bindings, thereby improving flexibility without significantly increasing system complexity
Solution Approach 2:
The patent introduces path identifiers as an intermediary element that mediates between downstream and upstream wavelength paths. These identifiers are carried in downstream frames and enable the OLT to flexibly indicate which upstream wavelength path should be used without requiring direct pre-established bindings between downstream and upstream paths
2Productivity
If multiple upstream wavelength paths are supported, then bandwidth utilization improves, but the complexity of path management increases
Solution Approach 1:
The patent enables the system to self-manage multiple wavelength paths through automated path identifier allocation and assignment. The OLT automatically assigns path identifiers to upstream wavelength paths and embeds them in downstream frames, eliminating the need for manual path management and reducing the complexity associated with supporting multiple paths while maximizing bandwidth utilization
3Productivity
If upstream service data and registration requests are transmitted separately, then transmission efficiency improves, but the need for separate path management increases
Solution Approach 1:
The patent makes the downstream frame structure universal by incorporating path identifier fields that can indicate different upstream wavelength paths based on the service type. The same frame structure is used for both upstream service data and registration requests, with the path identifier dynamically adjusted to indicate the appropriate upstream path, thereby enabling separate transmission without increasing path management complexity
Data Source
AI summary
A communication method, a device, and a system, the method including sending, by an optical line terminal (OLT) of a passive optical network that comprises the OLT and a plurality of optical network units (ONUs), a first downstream frame to the activated ONU using at least one downstream wavelength path, where the OLT and the at least one ONU of the plurality of ONUs communicate with each other using at the least one downstream wavelength path and a plurality of upstream wavelength paths, the plurality of ONUs comprises an activated ONU, wherein the first downstream frame comprises a first path identifier used to identify a first upstream wavelength path, and the first upstream wavelength path is one of the plurality of upstream wavelength paths, and receiving, by the OLT, upstream service data from the activated ONU using the first upstream wavelength path.