Power Efficient Communications via Dynamic Data Rate Scaling
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Solution Overview
Problem
Energy harvesting (EH) power sources have fundamentally different energy and power behavior compared to batteries, requiring loads to be optimized for either energy efficiency or power efficiency depending on the power source, leading to distinct operational modes and performance metrics.
Innovation Solution
The development of systems and methodologies that determine available output power from an EH source and adjust data transmission and reception rates accordingly to minimize peak-to-average power ratios, enabling power-efficient communications by scaling data rates based on available power, using techniques such as synthesizer stopping, communication buffering, and predictive algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission rate is increased to improve communication productivity, then productivity increases, but peak power consumption increases beyond EH source capability
Solution Approach 1:
The system dynamically adjusts the data transmission rate based on real-time monitoring of available power from the EH source. The communication module varies its operational parameters (data rate, modulation scheme) in response to changing power availability, transforming a static system into a dynamic one that adapts to the power constraints of the EH source.
Solution Approach 2:
The patent changes key operational parameters including data transmission rate, modulation order, and coding rate based on the available power level. By adjusting these parameters, the system optimizes the trade-off between productivity and power consumption, ensuring that communication performance matches the instantaneous power capability of the EH source.
2Reliability
If continuous operation mode is used to maintain reliable communication, then reliability improves, but energy consumption increases beyond EH source capacity
Solution Approach 1:
The system implements periodic monitoring of power availability and periodic adjustment of communication parameters. Rather than continuous operation at fixed power levels, the system uses periodic assessments of EH source status to trigger appropriate communication modes, reducing overall energy consumption while maintaining reliability during active transmission periods.
Solution Approach 2:
The patent incorporates feedback mechanisms where the communication module continuously monitors the power output of the EH source and adjusts its operational state accordingly. This closed-loop control ensures that communication reliability is maintained when power is available while preventing excessive energy consumption when power levels are low.
3Power
If peak power consumption is reduced to match EH source capability, then power efficiency improves, but data transmission rate decreases
Solution Approach 1:
The system employs partial action by transmitting data at reduced rates during periods of limited power availability, rather than attempting full-capacity transmission. This approach accepts suboptimal transmission rates temporarily to ensure successful data delivery, rather than risking complete transmission failure by attempting excessive data rates that exceed available power.
4Use of energy by moving object
If sleep mode is implemented to reduce energy consumption, then energy efficiency improves, but peak power availability requirements increase
Solution Approach 1:
The system achieves multi-functionality by implementing a hybrid operational mode that can operate in both continuous and sleep modes depending on power availability. The communication module is designed to seamlessly transition between different operational states, serving multiple functions (continuous transmission, periodic transmission, sleep mode) within a single unified system architecture.
Data Source
AI summary
A method, system, and device provide power-efficient communications within the context of available power. Transmission and receipt data rates are scalable in accordance with output power available from a power source. Data is transmitted at a data rate determined, at least in part, by the available output power.