Extended PSBu Delimiter for High-Rate Burst Detection
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Solution Overview
Problem
Existing optical communication systems face challenges in accurately detecting and recovering burst payloads due to issues such as missing bursts or severely errored bursts, particularly at higher transmission rates, which are not adequately addressed by current delimiter detection schemes.
Innovation Solution
The implementation of an extended delimiter constructed through the concatenation of multiple physical synchronization block sub-segments, such as a 128-bit delimiter formed from 64-bit sequences in different segments, enhances burst detection by providing improved delineation and payload recovery in burst mode communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional delimiter detection schemes are used in optical communication systems, then the system structure remains simple and compatible with existing standards, but the accuracy of burst detection deteriorates at higher transmission rates leading to missing bursts or severely errored bursts
Solution Approach 1:
The physical synchronization block is segmented into multiple sub-segments, and the delimiter is constructed by concatenating selected sub-segments from different segments. This segmentation approach allows the system to create a longer, more distinctive delimiter pattern that improves detection accuracy while maintaining compatibility with existing PON standards through structured recombination of standard components.
Solution Approach 2:
The extended delimiter is formed as a composite structure by concatenating multiple physical synchronization block sub-segments (e.g., a 32-bit sub-segment and a 64-bit sub-segment to form a 96-bit delimiter, or two 64-bit sub-segments to form a 128-bit delimiter). This composite approach creates a more robust detection pattern that reduces the probability of missing bursts or detecting severely errored bursts at higher transmission rates.
2Measurement precision
If an extended delimiter is constructed by concatenating multiple physical synchronization block sub-segments, then burst detection accuracy improves, but the complexity of delimiter configuration and management increases
Solution Approach 1:
The system performs preliminary configuration by defining the extended delimiter structure in advance through management messages (PLOAM messages) that specify the concatenation pattern of sub-segments. This preliminary setup allows the transceiver to automatically construct the appropriate extended delimiter without real-time complex decision-making, reducing operational complexity while maintaining high detection accuracy.
Solution Approach 2:
Management messages (PLOAM messages) serve as intermediaries to convey the extended delimiter configuration from the optical line terminal to the optical network unit. This intermediary mechanism simplifies the complexity by providing a standardized communication channel for delimiter configuration, allowing the transceiver to automatically apply the configured pattern without requiring complex manual setup or real-time negotiation.
3Reliability
If multiple physical synchronization block sub-segments are concatenated to form an extended delimiter, then the robustness of burst mode transmission improves, but the processing overhead for delimiter management increases
Solution Approach 1:
The extended delimiter configuration is established in advance through management message exchange, allowing the transceiver to pre-compute and store the concatenation pattern of sub-segments. During actual burst mode transmission, the pre-configured delimiter structure enables rapid detection without requiring complex real-time processing, thus improving robustness while minimizing processing time overhead.
Data Source
AI summary
Various example embodiments for supporting burst mode communications in an optical communication system may be configured to support burst mode communications based on use of an extended delimiter for improved burst detection. The extended delimiter for a burst may be constructed within an upstream physical synchronization block (PSBu) of the burst for enabling detection of the burst and recovery of the burst payload of the burst based on delineation of the burst payload using the extended delimiter. The extended delimiter may be constructed within a PSBu of a burst based on concatenation of multiple PSBu sub-segments of one or more PSBu segments of the PSBu. The extended delimiter may be used for burst detection within various types of optical communication networks, including passive optical networks (PONs).