Parent Node Selection in Power Line Communication Networks
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Solution Overview
Problem
Communication networks in power supply systems, such as those used in Automated Meter Management, face instability due to crosstalk and interference, which can disconnect node devices and disrupt data transmission between root and terminal nodes, necessitating a method to select a stable parent node device for improved network hierarchy.
Innovation Solution
A method where a node device collects reception quality and level information from potential parent nodes, compares this data to select the node with the highest minimum reception quality and level above predefined thresholds, and adjusts transmission levels to minimize interference, ensuring stable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a node device uses a simple parent selection method, then the device complexity is reduced, but the network stability deteriorates due to crosstalk and interference
Solution Approach 1:
The patent implements feedback mechanisms where node devices continuously monitor reception quality metrics (SNR, reception level) and use this information to dynamically adjust parent node selection. The system collects feedback from multiple potential parent nodes and uses this feedback to make informed selection decisions, thereby improving network stability without excessive complexity
Solution Approach 2:
The patent changes selection parameters from simple topology-based criteria to composite parameters including reception quality metrics (SNR, reception level). By evaluating multiple parameters and selecting parent nodes based on threshold comparisons and optimization criteria, the system achieves better reliability while managing complexity through structured evaluation
2Reliability
If a node device collects reception quality information from multiple potential parent nodes, then the network stability is improved, but the use of energy increases due to additional communication overhead
Solution Approach 1:
The patent applies partial action by collecting reception quality information from multiple potential parent nodes only when necessary (e.g., during parent selection events rather than continuously). This selective information gathering provides sufficient data for stable selection while avoiding the energy waste of continuous monitoring of all potential parents
Solution Approach 2:
The system uses existing communication infrastructure and protocols to gather reception quality information. Potential parent nodes already transmit signals for network operation, and the evaluating node uses these existing signals to measure reception quality, rather than requiring separate dedicated measurement transmissions that would consume additional energy
3Reliability
If a node device adjusts transmission levels to minimize interference, then the network reliability is improved, but the device complexity increases
Solution Approach 1:
The patent changes transmission control from fixed levels to dynamic adjustment based on reception quality metrics. The system monitors SNR and reception level parameters and adjusts transmission levels accordingly, using threshold-based decision logic that improves reliability while keeping the control mechanism relatively simple through parameter-driven automation
Data Source
AI summary
In a tree-like communication network implemented on an electrical power supply network, node devices that can act as relays between a root node device of the tree and other node devices attached to it, at least one first node device: obtains (503), from several second node devices that can act as parent node devices for said node device within the communication network, first reception quality and reception level information with respect to signals emitted by the first node device and received by the second node devices; obtains (504) second reception quality and reception level information with respect to signals emitted by each second node device and received by the first node device;and selects (506) the parent node device from among said second node devices, according to said first and second information obtained.;