OFDM Symbol Time Splitting for Energy Harvesting and Data Processing
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Solution Overview
Problem
Conventional wireless communication systems face challenges in efficiently utilizing energy resources, leading to increased power consumption and reduced device operating time, especially in energy-harvesting devices with limited or no on-board storage, which results in latency and resource allocation inefficiencies.
Innovation Solution
The method involves splitting OFDM symbols into energy harvesting and data processing portions, allowing energy-harvesting devices to perform both functions within a single symbol timeframe, reducing latency and resource allocation needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If energy-harvesting devices use conventional wireless communication methods, then they can maintain communication functionality, but power consumption increases and device operating time decreases
Solution Approach 1:
The OFDM symbol is segmented into two distinct time portions: a first time portion dedicated to energy harvesting and a second time portion dedicated to data processing. This segmentation allows the device to efficiently allocate resources within each symbol period, harvesting energy when needed and processing data when energy is available, thereby reducing overall power consumption and extending operating time.
2Productivity
If energy-harvesting devices with limited storage perform continuous operations, then communication functionality is maintained, but latency increases due to resource allocation inefficiencies
Solution Approach 1:
The patent implements periodic action by alternating between energy harvesting and data processing within each OFDM symbol period. This periodic structure ensures that energy-harvesting devices receive energy in regular intervals while maintaining consistent data processing cadence, thereby reducing latency and improving communication efficiency without requiring large energy storage capacity.
3Productivity
If OFDM symbols are used for both energy harvesting and data processing simultaneously, then resource allocation is optimized, but signal interference increases
Solution Approach 1:
The OFDM symbol is divided into separate time portions for energy harvesting and data processing, eliminating simultaneous operations that would cause signal interference. This temporal segmentation allows the device to switch between modes without interference while maintaining high resource utilization efficiency.
Solution Approach 2:
The patent employs periodic alternation between energy harvesting mode and data processing mode within each OFDM symbol. This periodic switching ensures that energy harvesting and data processing occur in distinct time intervals, preventing signal interference while optimizing overall resource usage.
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 approach enhances wireless communication efficiency by minimizing decoding and transmission delays, reducing power consumption, and optimizing resource usage for energy-harvesting devices.
Implementation Method 1
harvesting energy from the signal during a first time portion of the OFDM symbol
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communication. In one aspect, a method of wireless communication by a user equipment includes receiving a signal comprising an orthogonal frequency-division multiplexing (OFDM) symbol; harvesting energy from the signal during a first time portion of the OFDM symbol; and processing data from the symbol during a second time portion of the OFDM symbol.