Relay Node Frequency Band Selection for Power Line Networks
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Solution Overview
Problem
The G3-PLC standard for power line communications limits network capacity by allowing only one frequency band for node devices, leading to complex reconfiguration and increased latency when switching between bands, which hinders the expansion of Automated Meter Management networks.
Innovation Solution
A method and device that enable node devices to relay messages using at least two different frequency bands, reducing latency and allowing coexistence of devices capable of transmitting and receiving in multiple bands, by dynamically selecting an alternative frequency band for message relaying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If only one frequency band is used for a given node device in G3-PLC networks, then device complexity is reduced and ease of operation is improved, but message transmission latency increases and network capacity is limited when reconfiguration between bands is needed
Solution Approach 1:
The patent implements dynamic frequency band selection where relay nodes can adaptively switch between first and second frequency bands based on network conditions and device capabilities. This dynamic approach allows the system to optimize transmission latency by selecting appropriate bands without requiring complex static configuration, resolving the contradiction between speed and simplicity.
Solution Approach 2:
The system changes the frequency band parameter dynamically during message relay operations. By allowing relay nodes to operate on different frequency bands than the original transmitting node, the system reduces transmission latency while maintaining manageable device complexity through standardized relay protocols.
2Adaptability or versatility
If reconfiguration is performed to switch between frequency bands in G3-PLC networks, then network adaptability is improved, but the complexity of reconfiguration increases and message transmission latency increases
Solution Approach 1:
The patent introduces relay nodes as intermediaries that facilitate frequency band transitions. These relay nodes receive messages on one frequency band and forward them on another band, enabling network adaptability without requiring end devices to perform complex reconfiguration. The relay nodes handle the frequency switching complexity centrally, simplifying individual device operations.
3Productivity
If a single frequency band is used for network communication, then device complexity is reduced, but network capacity is limited and latency increases when the band reaches capacity
Solution Approach 1:
The patent enables relay nodes to perform multiple functions by operating on multiple frequency bands. These nodes can receive messages on a first band, process them, and forward on a second band, effectively multiplying network capacity. This multi-functionality approach increases productivity without requiring every device to be complex, as only relay nodes need multi-band capabilities.
Data Source
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AI summary
A method and device for relaying a fragmented message received from a first node device by a second node device to a third node device, said node devices belonging to an electrical power supply network using power line carrier communications and/or radio frequency communications.The second node device is capable of transmitting and receiving messages on at least two frequency bands from a set of frequency bands, and - receives (E300) a first fragment of the message in a first frequency band, - checks (E301) if the third node device is capable of transmitting and receiving in a frequency band different from the first frequency band, - selects (E303) a frequency band that is different from the first frequency band if the third node device is capable of transmitting and receiving in a frequency band different from the first frequency band, - relays (E304) the first fragment in the selected frequency band or the first frequency band depending on the result of the check.