Dynamic Modulation Profile Adjustment for Interference Mitigation
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Solution Overview
Problem
Communication networks, such as those using the Multimedia over Coax Alliance (MoCA) protocol, face interference issues that lead to increased packet error rates due to varying modulation densities and dynamic interference, causing network nodes to malfunction and resulting in poor network performance.
Innovation Solution
A method where network nodes monitor message reception and adjust their modulation profiles based on error rates, disconnecting and reconnecting as needed to mitigate interference by switching to more robust modulation schemes during interference events, thereby maintaining network stability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a denser modulation profile is used to transmit more information bits, then the data transmission capacity is improved, but the communication robustness deteriorates and packet error rate increases
Solution Approach 1:
The patent implements dynamic modulation profile adjustment where the network controller monitors packet error rates and adapts the modulation density in real-time. When interference is detected (high error rate), the system automatically switches to less dense modulation schemes, and when conditions improve, it transitions back to denser modulation to maximize throughput. This dynamic adaptation resolves the contradiction by making the modulation profile flexible rather than fixed.
Solution Approach 2:
The system changes the modulation parameter (modulation profile density) based on channel conditions. By monitoring packet error rates and adjusting the modulation scheme accordingly, the system optimizes the balance between data capacity and communication reliability. Different modulation profiles (e.g., QPSK, 16-QAM, 64-QAM) are selected based on current interference levels.
2Reliability
If network nodes continuously monitor and adjust modulation profiles, then interference mitigation capability is improved, but system complexity increases
Solution Approach 1:
The patent employs a feedback mechanism where packet error rates are monitored and used to automatically adjust modulation profiles. The network controller receives feedback about communication quality and dynamically modifies transmission parameters accordingly. This feedback-driven approach improves interference mitigation without requiring complex manual intervention or overly sophisticated algorithms.
Solution Approach 2:
The network controller autonomously monitors packet error rates and self-adjusts modulation profiles without external intervention. The system performs self-diagnosis of interference conditions and self-correction by switching modulation schemes, reducing the need for complex external control mechanisms while maintaining reliable interference mitigation.
3Productivity
If disconnection and reconnection is used to mitigate interference, then network performance is restored, but network stability deteriorates due to frequent reconnections
Solution Approach 1:
The system performs preliminary interference detection by monitoring packet error rates before complete communication failure occurs. By detecting interference early and proactively switching to more robust modulation profiles, the system prevents the need for disconnection and reconnection, thereby maintaining network stability while still restoring performance when interference is detected.
Solution Approach 2:
The network controller dynamically adjusts modulation profiles in real-time based on interference conditions, avoiding the need for rigid disconnection/reconnection cycles. This dynamic adaptation allows the system to maintain continuous connectivity while adjusting to changing channel conditions, thus preserving network stability while restoring performance.
Data Source
AI summary
In a method for adjusting modulation on a network, a modulation profile of a network node on the network is set a specified density. A plurality of messages that are received at the network node are monitored on an ongoing basis. The modulation profile of the network node is updated continually based on the monitored messages. A determination is made that a predetermined class of messages is received incorrectly at the network node. The network node is disconnected from the network based on the incorrectly received predetermined class of messages and is reconnected to the network to initiate the network node on the network.