Power Line Communication Node Frequency Band Selection
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Solution Overview
Problem
Current power line communication systems, such as those using the G3-PLC standard, face challenges in efficiently managing multiple frequency bands, leading to complex reconfiguration and limited network capacity, which hinders the introduction of new functionalities and increased communication exchanges in Automated Meter Management (AMM) electricity supply networks.
Innovation Solution
A method that allows node devices to simultaneously communicate in multiple frequency bands by transmitting a message requesting a channel estimate in each band, receiving and recording channel estimates, and determining an optimal transmission mode based on these estimates, enabling the use of a robust communication mode to handle interference and increase network capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single frequency band is used for communication in power line networks, then device complexity is reduced and ease of operation is improved, but network capacity is limited and reconfiguration becomes complex when band changes are needed
Solution Approach 1:
The patent implements dynamic frequency band selection where the communication system can adaptively switch between single-band and multi-band modes based on network conditions. The multi-band capability is maintained but activated only when needed, allowing the system to be dynamic in its resource utilization without permanently increasing complexity.
Solution Approach 2:
The patent enables node devices to perform multiple communication functions by supporting multiple frequency bands. The same hardware infrastructure can handle both single-band communications for simplicity and multi-band communications for increased capacity, making the system universal in its operational capabilities.
2Adaptability or versatility
If reconfiguration to a new frequency band is performed, then network capacity can be increased, but communication reliability deteriorates due to potential message loss during reconfiguration
Solution Approach 1:
The patent performs preliminary channel estimation and quality assessment before initiating frequency band reconfiguration. By evaluating channel conditions in advance, the system can determine the optimal timing and conditions for reconfiguration, ensuring that meters are properly prepared and can receive reconfiguration messages reliably before the actual band change occurs.
Solution Approach 2:
The patent implements feedback mechanisms where channel estimation results are continuously monitored and used to adjust reconfiguration timing. The system receives feedback about channel quality and uses this information to decide when reconfiguration should occur, ensuring that reconfiguration happens only when conditions are favorable for maintaining communication reliability.
3Productivity
If multiple frequency bands are used simultaneously, then network capacity and transmission speed are increased, but device complexity increases due to the need to manage multiple bands
Solution Approach 1:
The patent segments the communication process into distinct phases: channel estimation phase, quality assessment phase, and data transmission phase. Each phase operates independently with specific protocols, allowing the system to manage multiple frequency bands by breaking down the complex task into manageable segments rather than handling all bands simultaneously in a monolithic manner.
Data Source
AI summary
A method for determining a mode of transmission between two nodes of a power line communication network, the method comprising transmitting a first message from the first node to the second node in at least two frequency bands, said first message comprising, in each of the at least two frequency bands, information according to which a channel estimate is requested; the first node receiving at least one second message transmitted from the second node and comprising information representative of a channel estimate of at least one of the frequency bands in response to the first message; and determining a transmission mode for transmitting a third message to be transmitted based on the information received from the second node in response to the first message. The invention also relates to a device configured so as to execute the method.