PON FEC Switching via OLT-ONU Burst Profile Binding
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Solution Overview
Problem
The existing PON systems have fixed upstream and downstream FEC algorithms, limiting improvements in user experience and communication quality due to inflexible FEC configurations.
Innovation Solution
A communication control method for OLT and ONU that allows for adaptive FEC switching by reporting and binding FEC code capabilities to burst profile indices, enabling dynamic FEC code selection based on reported FEC code sets and service scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed FEC algorithms are used in PON systems, then system stability is maintained, but adaptability to different service scenarios is limited
Solution Approach 1:
The patent implements dynamic FEC code switching by allowing the system to transition between different FEC algorithms (RS and LDPC) based on real-time service requirements and channel conditions. The OLT can dynamically select and configure appropriate FEC codes for different ONUs and service types, making the previously static FEC configuration adaptive and flexible.
Solution Approach 2:
The patent changes the FEC code parameter from a fixed value to a variable that can be selected from multiple options (RS(255,239), RS(255,216), LDPC(17280,14592), etc.). By introducing parameter variability and allowing selection among different FEC algorithms with different error correction capabilities, the system achieves adaptability while managing complexity through standardized configuration procedures.
2Reliability
If multiple FEC codes are supported for switching, then user experience is improved, but system complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the OLT monitors communication quality metrics and service requirements, then selects appropriate FEC codes based on this feedback. The system continuously evaluates channel conditions and adjusts FEC configuration accordingly, creating a closed-loop control system that improves reliability while automating the management of multiple FEC codes to reduce operational complexity.
Solution Approach 2:
The patent performs preliminary configuration of FEC code capabilities during ONU initialization and registration phases. The OLT queries ONU FEC capabilities in advance and pre-configures appropriate FEC codes before actual data transmission begins. This preliminary action prepares the system for reliable communication while simplifying real-time decision-making by having FEC configurations ready beforehand.
Data Source
AI summary
The present disclosure provides a communication control method applied to an Optical Line Terminal (OLT), including: receiving a Forward Error Correction (FEC) code capability set reported by an Optical Network Unit (ONU); issuing a binding strategy to the ONU according to the FEC code capability set, the binding strategy representing a binding relationship between an FEC code in the FEC code capability set and a burst profile index; and instructing the ONU to perform FEC code switching. The present disclosure further provides a communication control method applied to an ONU, including: reporting an FEC code capability set; receiving a binding strategy issued by an OLT; and performing FEC code switching as instructed by the OLT. The present disclosure further provides an OLT, an ONU, and a computer-readable medium.