Power Line Communication Phase Selection for Range and Rate Trade-offs
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Solution Overview
Problem
Current power line communication (PLC) networks face challenges in efficiently utilizing multiple electrical phases for communication, particularly in rural environments where distance between endpoints is large, leading to trade-offs between data rate and transmission range.
Innovation Solution
A PLC device dynamically selects one or more electrical phases for communication based on connected phase data from neighboring devices, choosing between single-phase higher output power and multiple-phase lower output power transmission to optimize link quality and network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple electrical phases are used for PLC communication, then data transmission rate is improved, but transmission range deteriorates
Solution Approach 1:
The system dynamically selects the number of electrical phases to use based on real-time link conditions and message priorities. The phase selection is not fixed but adapts to changing network conditions, allowing the system to optimize between data rate and transmission range as needed for each communication scenario.
Solution Approach 2:
The invention changes the parameter of phase utilization from a fixed value to a variable that can be adjusted between 1 and 3 phases. By modifying this parameter based on link quality, message type, and power constraints, the system can achieve different operating points on the data rate versus transmission range trade-off curve.
2Length of moving object
If higher output power is used for single-phase transmission, then transmission range is improved, but data transmission rate deteriorates
Solution Approach 1:
The output power and phase configuration are dynamically adjusted based on link conditions. For long-range communications, the system uses single-phase with higher power; for short-range high-speed communications, it uses multiple phases with lower power per phase, optimizing the trade-off in real-time.
Solution Approach 2:
The system uses partial action by selecting only the necessary number of phases for each transmission rather than always using all available phases. This allows concentrating power on fewer phases when range is the priority, while using all phases when maximum data rate is needed and range is sufficient.
3Productivity
If all three phases are utilized for communication, then network throughput is improved, but device complexity increases
Solution Approach 1:
The phase selection mechanism adds dynamic decision-making capability that adapts to network conditions. Rather than always using all three phases, the device intelligently selects the optimal number of phases based on link quality, message priority, and power constraints, achieving high throughput only when conditions permit.
Solution Approach 2:
The system changes the operational parameter from fixed three-phase operation to variable phase operation (1-3 phases). This parameter change allows the device to simplify operation when conditions require it while maintaining the capability for high-throughput multi-phase operation when conditions are favorable.
Data Source
AI summary
In one embodiment, a device receives connected phase data from a neighboring device indicative of one or more electrical phases to which the neighboring device is connected. A determination is made, based on the connected phase data for the neighboring device, whether to transmit the message to the neighboring device over a single electrical phase at a higher output power or over a plurality of electrical phases at a lower output power. The message is then transmitted to the neighboring device over the determined one or more electrical phases.