Synchronization Character Coding for Noise-Resistant EPON Detection
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Solution Overview
Problem
The existing Ethernet passive optical network (EPON) systems face high probabilities of incorrect synchronization due to noise interference, leading to errors in data reception, which affects the reliability of data transmission.
Innovation Solution
A method and device for information block coding and synchronization detecting that utilize a specific synchronization character sequence, where the difference between consecutive synchronization characters is greater than 1 and the difference between every other pair of characters is greater than 0, to reduce the likelihood of incorrect synchronization without increasing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional synchronization characters (01 or 10) are used in EPON systems, then the system can achieve basic synchronization, but the probability of incorrect synchronization increases due to noise interference
Solution Approach 1:
The patent changes the parameters of synchronization characters from traditional single-bit differences (01 or 10) to multi-bit patterns with specific constraints (consecutive characters differ by more than 1, every other character differs by more than 0). This parameter transformation increases the Hamming distance between valid synchronization sequences, making them more resistant to noise-induced bit errors and reducing the probability of incorrect synchronization.
Solution Approach 2:
The patent implements error protection mechanisms by designing synchronization character sequences with built-in redundancy and constraints before transmission. The specific structural constraints (|Ti - Ti-1| > 1 and |Ti - Ti-2| > 0) act as a cushion against noise interference, allowing the receiver to detect and correct certain types of errors without losing synchronization.
2Reliability
If more robust synchronization mechanisms are implemented to reduce incorrect synchronization, then synchronization reliability improves, but system complexity increases
Solution Approach 1:
The patent achieves improved synchronization reliability through parameter changes in the synchronization character sequences rather than through complex algorithms. By imposing simple structural constraints on the sequences (difference constraints between consecutive and alternate characters), the system gains robustness without requiring complex encoding or detection mechanisms, thus avoiding significant increases in device complexity.
Data Source
AI summary
A method and a device for information block coding and synchronization detecting are provided. Information block coding and synchronization detecting may be performed according to a synchronization character sequence satisfying certain conditions. Thus, the probability of incorrect synchronization may be effectively reduced without increasing the complexity. Optimal synchronization character sequences in different lengths are provided to further reduce the probability of incorrect synchronization.