DSL Communication Noise Detection and Adaptive Protection
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Solution Overview
Problem
Communication systems, particularly DSL systems, are severely affected by repetitive electrical impulse noise (REIN) during initialization and handshake phases, leading to bit-errors that do not meet quality of service requirements, as existing methods fail to account for REIN presence before data transfer.
Innovation Solution
A method is introduced to detect REIN during a communication or training phase, where if detected, a message is transmitted to signal its presence, and adaptive noise protection parameters are proposed to adjust impulse noise protection, including an adaptive handshake with multi-time symbol detection using over-sampled transforms and REIN training phase to identify and communicate REIN characteristics, enabling effective protection during data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If impulse noise protection is applied only during data transfer, then data transfer reliability is improved, but initialization and handshake phases remain vulnerable to REIN
Solution Approach 1:
The patent applies preliminary action by detecting REIN during the initialization and handshake phases before data transfer begins. The system performs noise detection and characterizes REIN parameters (duration, frequency, amplitude) in advance, allowing protective measures to be prepared and configured before actual data transmission occurs. This ensures that protection mechanisms are already in place when data transfer starts.
Solution Approach 2:
The patent implements dynamics by making the noise protection parameters adaptive rather than fixed. The system dynamically adjusts protection parameters based on detected REIN characteristics during different communication phases. Protection measures are activated, modified, or deactivated according to real-time noise conditions, enabling the system to optimize performance across varying operational states.
2Reliability
If REIN detection is performed during initialization phase, then protection can be activated in advance, but communication setup time increases
Solution Approach 1:
The patent applies partial action by implementing REIN detection during specific critical phases (initialization and handshake) rather than continuously throughout the entire communication process. The system performs detection only when necessary to establish protective parameters, avoiding unnecessary detection operations during stable data transfer phases, thus balancing thoroughness with time efficiency.
Solution Approach 2:
The patent utilizes feedback by continuously monitoring channel conditions during initialization and using the detected REIN information to adjust protection parameters for subsequent data transfer. The system feeds back noise characteristics to the protection mechanism, enabling dynamic adaptation that optimizes both reliability and setup time by learning from initial observations.
3Reliability
If adaptive noise protection parameters are applied, then REIN effects are reduced, but system complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying existing protection parameters (such as FEC coding rates, interleaving depths, and signal processing thresholds) based on detected REIN characteristics. Rather than implementing entirely new complex protection systems, the system adapts existing parameters dynamically - adjusting coding strength, filtering characteristics, and error correction parameters to match the actual noise conditions, thereby achieving effective protection with manageable complexity.
Data Source
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AI summary
A method limits the effect of repetitive electrical impulse noise (208) in a communication system (200). The presence of the repetitive electrical impulse noise (208) is detected during communication service. If the repetitive electrical impulse noise (208) is detected, then a message is transmitted which signals that the repetitive electrical impulse noise (208) is present. Other systems and methods are disclosed.