Optimized SOD Delimiter Sequences for PON Data Synchronization
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Solution Overview
Problem
Conventional data synchronization techniques in Passive Optical Networks (PONs) are inadequate due to high bit error probabilities in synchronization delimiters, leading to false locking and degraded system performance.
Innovation Solution
The implementation of optimized Start of Data (SOD) delimiter sequences with a Hamming distance of 32 between the SOD delimiter and False Synchronization Candidates, reducing false locking probability and improving synchronization reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional synchronization delimiters are used in PON systems, then the system can maintain basic synchronization functionality, but high bit error probabilities occur leading to false locking and degraded system performance
Solution Approach 1:
The patent applies parameter changes by modifying the synchronization delimiter sequence to achieve a Hamming distance of 32 between the SOD delimiter and false synchronization candidates. This parameter modification (changing the delimiter sequence) directly reduces the bit error probability and prevents false locking, thereby improving synchronization reliability without adding system complexity
2Reliability
If optimized SOD delimiter sequences with Hamming distance 32 are implemented, then false locking probability is reduced and synchronization reliability is improved, but the complexity of the synchronization mechanism increases
Solution Approach 1:
The patent resolves the contradiction by changing the parameter of the synchronization delimiter sequence to achieve Hamming distance 32. This parameter change improves reliability while the patent argues that the complexity increase is minimal since it only affects the delimiter sequence design rather than the overall synchronization mechanism structure
Data Source
AI summary
A system and method for data synchronization in Passive Optical Networks are disclosed. According to an embodiment, the present invention provides a method for providing upstream data synchronization in an optical communication network. The method includes sending data from an Optical Network Unit. The data includes a first data frame, which includes a header sequence, a synchronization segment, and a data segment. The synchronization segment includes 66 bits, which includes a first number of bits having nonzero values and a second number of bits having a value of zero. The first number is different from the second number. The method further includes receiving at least the first data frame by an Optical Line Terminal. The method also includes processing the first data frame. The method additionally includes selecting a first segment of the first data frame, the first segment including 66 bits.