BCDR Parameter Mapping for Faster ONU Burst Clock Recovery
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Solution Overview
Problem
Existing technologies lack a method to effectively acquire, store, and utilize operation parameters for Burst Clock Data Recovery (BCDR) chips in Optical Line Terminals (OLTs) of Passive Optical Networks (PONs), which are necessary for efficient burst clock recovery and equalization due to varying signal power, device bandwidth, and transmission distance of upstream burst packets from Optical Network Units (ONUs).
Innovation Solution
A method and device for configuring BCDR chip operation parameters by performing training on burst signals from ONUs, associating ONU identity information with these parameters, and using message instructions to manage configuration and deletion, enabling efficient parameter acquisition, storage, and utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If pre-configuration of operation parameter is implemented in BCDR chip, then burst clock recovery and equalization time is reduced, but there is no available solution for how to acquire, store, and use the operation parameter
Solution Approach 1:
The patent performs operation parameter training in advance before actual burst packet reception. The BCDR chip acquires operation parameters through training on burst signals from ONUs and stores them in a parameter table, so that when actual data reception occurs, the parameters are already ready for immediate use, reducing recovery time.
Solution Approach 2:
The patent introduces an intermediary mechanism involving the OLT (Optical Line Terminal) and BCDR chip communication protocol. The OLT sends training signals and control instructions to the BCDR chip, which processes these signals to acquire and store parameters. This intermediary communication framework solves the complexity of parameter acquisition by providing a structured interaction protocol.
2Measurement precision
If operation parameter is acquired through training on burst signals, then parameter accuracy for specific ONU is improved, but training process increases system complexity
Solution Approach 1:
The patent applies local quality by acquiring operation parameters specifically tailored to each ONU's characteristics (signal power, bandwidth, transmission distance) rather than using generic parameters. The BCDR chip performs training separately for each ONU to obtain ONU-specific parameters, ensuring optimal performance for each individual connection.
Solution Approach 2:
The patent uses copying by creating a parameter table that stores acquired operation parameters as copies for future reference. Instead of re-acquiring parameters for each ONU every time, the system creates and stores parameter copies during training phase, then retrieves these pre-acquired parameter copies during actual operation, reducing real-time processing complexity.
3Speed
If correspondence between ONU identity information and operation parameter is established, then parameter configuration speed is improved, but memory storage requirement increases
Solution Approach 1:
The patent applies segmentation by organizing the parameter storage into a structured parameter table with specific fields for ONU identity information and corresponding operation parameters. This segmented structure allows efficient retrieval of parameters for specific ONUs without storing all possible parameters for all devices, optimizing the balance between access speed and storage requirements.
Data Source
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AI summary
Embodiments of the present disclosure provide a burst clock data recovery (BCDR) chip working parameter configuration method and device. The method comprises: a BCDR chip performs working parameter training according to a burst signal of a passive optical network ONU to obtain working parameters of the ONC; and the BCDR chip associates first identity information of the ONU from an optical line terminal (OLT) with the working parameters to establish a correspondence between the first identity information and the working parameters, so as to perform working parameter configuration on the BCDR chip according to the correspondence.