Powerline Message Transmission via Multi-Band Robust Modulation
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Solution Overview
Problem
Powerline communication networks, particularly in electrical supply networks using the G3-PLC standard, face challenges with frequency band reconfiguration and interference, leading to complex network reconfiguration and potential communication breakdowns due to strong interference.
Innovation Solution
A hyper-robust transmission method that modulates messages using Reed-Solomon coding, convolutional coding, code repetition, and BPSK modulation, transmitting on multiple frequency bands simultaneously to ensure message delivery even in the presence of strong interference, allowing nodes to switch to alternative frequency bands if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single frequency band is used for communication, then device complexity is reduced, but communication reliability deteriorates due to strong interference on that frequency band
Solution Approach 1:
The communication system segments the transmission by dividing messages into multiple packets and transmitting them across different frequency bands (PLC and RF segments). This allows the system to maintain simplicity in individual band operations while achieving overall reliability through diversification across segments.
Solution Approach 2:
The system dynamically changes the frequency band parameter by switching between PLC and RF bands based on interference conditions. When strong interference is detected on one band, the system transitions to another band, thereby maintaining communication reliability without requiring complex multi-band simultaneous operations.
2Reliability
If frequency band reconfiguration is implemented, then communication reliability improves under interference, but network reconfiguration complexity increases
Solution Approach 1:
The system implements dynamic frequency band selection where node devices can switch between PLC and RF bands based on real-time interference conditions. This dynamic adaptation allows the network to respond to interference without requiring complex centralized reconfiguration, as each device independently adjusts its operating band.
Solution Approach 2:
The patent introduces a gateway device as an intermediary that manages the transition between PLC and RF bands. The gateway coordinates the frequency band switching and message routing, simplifying the reconfiguration process by centralizing the complexity in a single device rather than requiring all devices to simultaneously reconfigure.
3Reliability
If robust mode modulation with multiple coding layers is used, then message delivery reliability improves, but transmission time increases
Solution Approach 1:
The system applies multiple coding layers (Reed-Solomon, convolutional coding, repetition coding) in advance during the modulation process. By pre-processing the message with these robust coding schemes before transmission, the system ensures high delivery reliability without requiring repeated retransmissions, thereby reducing overall transmission time despite the initial processing overhead.
Solution Approach 2:
The patent applies excessive coding redundancy through multiple coding layers and repetition coding, transmitting more encoded data than the minimum required. This excessive action ensures high reliability by providing multiple copies and error correction capabilities, allowing the receiver to reliably reconstruct the original message even in noisy conditions, thereby avoiding time-consuming retransmissions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enhances network communication resilience by ensuring message delivery across multiple frequency bands, mitigating interference and simplifying network reconfiguration, thereby improving network stability and reliability.
Implementation Method 1
a modulation according to said robust mode comprising successively a Reed-Solomon coding, a convolutional coding, a coding by code repetition and a BPSK modulation
Data Source
AI summary
A message-transmission method for transmitting a message from a first node device to a second node device belonging to a network neighbourhood of said first node device is described. The first and second node devices belong to an electrical supply network using powerline and/or radio-frequency communications. The first node device transmits said message to said second node device on a first frequency band and at least one second frequency band of a set of frequency bands comprising at least two frequency bands. The message being on each occasion modulated according to a robust mode, a modulation according to said robust mode comprising successively a Reed-Solomon coding, a convolutional coding, a code repetition coding and a BPSK modulation.