Power Line Communication Interference Reduction via Dynamic Power Control
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Solution Overview
Problem
Modern communication systems face interference issues due to overlapping frequency usage, particularly between power line communication networks and radio services, leading to radio reception impairment and potential system shutdowns, which hinders the adoption of power line communication technology.
Innovation Solution
An automated interference reduction method where a faulty network system detects excessive noise and sends control information via a dedicated channel to potential disruptors, reducing transmission power in the interfering frequency range, allowing for efficient identification and suppression of interference sources without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PLC networks use wide frequency ranges for high data rates, then data transmission performance is improved, but radio reception quality deteriorates due to interference emissions
Solution Approach 1:
The system dynamically changes transmission parameters (frequency ranges, power levels) based on detected interference conditions. The PLC network automatically adjusts its operating parameters to reduce interference with radio services while maintaining acceptable data transmission performance.
Solution Approach 2:
The patent implements a feedback mechanism where radio reception quality is monitored and this information is used to control PLC transmission behavior. The system receives feedback about interference levels and automatically adjusts its operation accordingly, creating a closed-loop control system.
2Object-affected harmful factors
If manual interference suppression procedures are used to identify and eliminate disruptors, then radio reception quality is improved, but operational complexity and time consumption increase
Solution Approach 1:
The system enables automatic self-diagnosis and self-correction of interference problems. The PLC network automatically detects interference sources, identifies disruptors through coordinated measurement, and implements suppression measures without requiring manual intervention, thereby simplifying operation.
Solution Approach 2:
The patent introduces an intermediary control system that coordinates between PLC networks and radio services. This intermediary entity manages the interference suppression process, automating what would otherwise require manual coordination between different network operators and technicians.
3Object-affected harmful factors
If transmission power of interferers is reduced to eliminate interference, then radio reception quality is improved, but data transmission performance of the interferer deteriorates
Solution Approach 1:
The system applies selective power reduction only in the specific frequency ranges where interference occurs, rather than reducing overall transmission power. This allows the PLC network to maintain high data rates in non-interfering frequency bands while suppressing interference in affected bands.
Solution Approach 2:
The patent implements dynamic power adjustment where transmission power is adaptively controlled based on real-time interference conditions. The system can switch between different power levels and frequency allocations, optimizing both radio reception quality and PLC data transmission performance under varying conditions.
Data Source
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AI summary
The invention relates to a method (300) for reducing interference in a communication network (200) with a first network entity (101) and a second network entity (103), comprising: detecting (301) an interference signal (102) in an interference frequency range by the first network entity (101); transmitting (303) control information over the interference frequency range from the first network entity (101) to the second network entity (103); and reducing (305) a transmission power of the second network entity (103) in the interference frequency range in response to a reception of the control information by the second network entity (103).