Smart Meter Hybrid PLC RF Reactive Routing
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Solution Overview
Problem
Powerline communication networks for smart electricity meters face interference and unreliability due to crosstalk, noise, and impedance mismatches, leading to communication breaks and requiring time-consuming and resource-intensive deployment of complementary RF networks for stable data retrieval.
Innovation Solution
A smart electric meter with both powerline carrier current and radio frequency communication interfaces uses a reactive routing protocol to connect to a centralized management system, selecting the relay agent with the lowest route cost and defining consistent route costs for both interfaces, allowing transparent registration and routing of messages at the link layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a power line communication network is used for smart electricity metering, then the existing power infrastructure can be utilized for data transmission, but communication reliability deteriorates due to crosstalk, noise, and impedance mismatches
Solution Approach 1:
The patent introduces a hybrid communication architecture where RF interfaces act as intermediary communication paths to supplement PLC links. When PLC communication fails or is unreliable, the system automatically switches to or uses RF interfaces as mediators to maintain communication between smart meters and the management system, thereby resolving the reliability issue while keeping the existing PLC infrastructure.
Solution Approach 2:
The system dynamically changes communication parameters by selecting different communication interfaces (PLC or RF) based on link quality metrics. The route cost calculation incorporates communication reliability parameters, allowing the system to adaptively switch between PLC and RF modes to maintain optimal communication reliability while utilizing the existing power line infrastructure.
2Reliability
If a complementary RF network is deployed to backup the power line communication network, then communication reliability improves, but deployment time and resource requirements increase
Solution Approach 1:
The patent makes smart meters universally capable of both PLC and RF communication by equipping them with dual interfaces. This multi-functionality allows the same hardware to serve both communication modes, eliminating the need for separate dedicated RF infrastructure deployment. The system can selectively activate RF functionality based on need, reducing deployment complexity while maintaining reliability.
Solution Approach 2:
The hybrid communication system enables self-service by allowing smart meters to autonomously select and switch between PLC and RF interfaces based on real-time link quality assessment. The meters themselves perform the function of monitoring communication reliability and initiating mode switching, reducing the need for external infrastructure deployment and manual configuration.
3Adaptability or versatility
If both power line communication and radio frequency interfaces are equipped in smart meters, then communication flexibility improves, but device complexity increases
Solution Approach 1:
The patent implements dynamic interface selection where the smart meter actively monitors communication link quality and dynamically switches between PLC and RF interfaces based on real-time conditions. This dynamic behavior allows the system to maintain simplicity by using only the necessary interface at any given time, while preserving flexibility when both interfaces are available. The route cost mechanism guides this dynamic selection process.
Data Source
Figure 1A
Figure 1B~2
Figure 3
AI summary
A system comprising a power-line communication network with reactive routing protocol and at least one gateway (121) comprising a power-line communication interface and at least one radiofrequency communication interface. A smart electricity meter (116) also comprising a power-line communication interface and at least one radiofrequency communication interface: broadcasts, on each of the communication interfaces thereof, an announcement request message; after receiving one or more announcement messages, selects a relay agent (121) having the lowest route cost for connecting to a centralised management device; and carries out a registration request, using the selected relay agent as a representative. After registration, the routing of messages from or to said smart electricity meter is carried out in the link layer of the OSI model.