OLT Control Device Dynamic Splitter Ratio for PON Resilience
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Passive optical networks (PONs) face challenges in maintaining communication when failures such as facility failures occur.
Innovation Solution
A communication system with a dual OLT setup and an OLT control device that manages distribution ratios at splitters to ensure optical signals are reliably distributed to ONUs, even in the event of failures, by dynamically switching between OLTs and adjusting splitter distribution ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single OLT is used in a PON, then the system structure is simple, but communication cannot be maintained when facility failures occur
Solution Approach 1:
The system divides the single OLT function into multiple independent OLT units (first OLT and second OLT), each capable of independently providing communication services. This segmentation allows the system to isolate failures to specific segments while maintaining overall communication capability through the remaining operational OLTs.
Solution Approach 2:
The control device dynamically adjusts the distribution ratio parameter at splitters based on the operational status of OLTs. When an OLT fails, the system changes the distribution ratio to redirect optical signals to alternative OLTs, enabling flexible adaptation to failure conditions and maintaining communication reliability.
2Reliability
If the distribution ratio at the splitter is fixed, then the system operation is simple, but the optical signal cannot be reliably distributed when OLT failures occur
Solution Approach 1:
The distribution ratio at the splitter is transformed from a fixed parameter to a dynamically adjustable parameter. The control device modifies the distribution ratio in real-time based on the operational status of OLTs, enabling the system to adapt to failure conditions and ensure reliable optical signal distribution to remaining operational ONUs.
Solution Approach 2:
The control device monitors the operational status of OLTs and uses this feedback information to adjust the distribution ratio at splitters. This closed-loop feedback mechanism ensures that the system automatically redirects optical signals to functional OLTs when failures occur, maintaining reliable communication without requiring manual intervention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration increases the likelihood of maintaining communication across the network even during failures by ensuring that optical signals are reliably routed to ONUs, enhancing network resilience.
Implementation Method 1
The splitter distributes and outputs an optical signal transmitted from the OLT system to the ONU connected to the splitter and a succeeding device that is another splitter or the OLT system
Data Source
AI summary
A communication system of a passive optical communication network includes an optical line terminal (OLT) system including a first OLT, a second OLT, and an OLT control device that controls the first OLT and the second OLT, a plurality of splitters that connect the first OLT and the second OLT with an optical communication path, and an ONU that is connected to each of the splitters with an optical communication path. The splitter distributes and outputs an optical signal transmitted from the OLT system to the ONU connected to the splitter and a succeeding device that is another splitter or the OLT system, and the OLT control device determines a distribution ratio at the splitter, the distribution ratio indicating a ratio between the intensity of the optical signal distributed to the succeeding device and the intensity of the optical signal distributed to the ONU.