UE Power Control for Wireless Charging and Data Transmission
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Solution Overview
Problem
Wireless communications systems face challenges in determining appropriate transmit power for energy harvesting transmissions, as power control defined for uplink or sidelink transmissions is not suitable for energy harvesting, and existing methods lack efficient techniques for optimizing energy transfer between devices.
Innovation Solution
A method where a transmitting UE receives different configurations for determining a first transmit power for data transmissions and a second transmit power for energy harvesting transmissions, with the ability to receive an indication of the second transmit power from a receiving UE based on its energy harvesting capabilities, allowing for efficient energy harvesting by using the appropriate power settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If power control defined for uplink or sidelink transmissions is used for energy harvesting transmissions, then the existing power control mechanism can be maintained, but the energy harvesting efficiency is insufficient
Solution Approach 1:
The patent segments the power control configuration into separate configurations for data transmissions and energy harvesting transmissions. The transmitting UE receives a first configuration for data transmissions and a second configuration for energy harvesting transmissions, allowing independent optimization of power settings for each transmission type without increasing overall system complexity.
Solution Approach 2:
The patent applies parameter changes by introducing a second configuration with specific parameters optimized for energy harvesting transmissions, such as power spectral density, transmit power, and resource allocation parameters. These parameter changes enable the system to optimize energy harvesting efficiency while maintaining the existing power control framework.
2Productivity
If a single transmit power configuration is used for both data and energy harvesting transmissions, then the configuration complexity is reduced, but the energy transfer efficiency deteriorates
Solution Approach 1:
The patent implements dynamic power control by allowing the transmitting UE to adjust transmit power based on different configurations for different transmission types. The UE can dynamically select appropriate power settings from the received configurations depending on whether the transmission is for data or energy harvesting, optimizing energy transfer efficiency while managing configuration complexity.
Solution Approach 2:
The patent introduces specific parameter changes in the second configuration for energy harvesting transmissions, including power spectral density, transmit power, and resource allocation parameters. These parameter changes enable optimized energy transfer efficiency while maintaining a manageable configuration structure through systematic organization of power control parameters.
3Loss of energy
If the transmitting UE determines transmit power without receiving UE feedback, then the signaling overhead is reduced, but the energy harvesting performance at the receiving UE is suboptimal
Solution Approach 1:
The patent implements feedback mechanisms where the receiving UE provides information about its energy harvesting capabilities and received power levels to the transmitting UE. This feedback enables the transmitting UE to adjust transmit power settings in the second configuration to optimize energy harvesting performance while managing signaling overhead through efficient feedback formats and timing.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A transmitting user equipment (UE) may receive different configurations for determining a first transmit power for data transmissions and a second transmit power for energy harvesting transmissions. The different configurations may include different parameters for determining (e.g., calculating) the first transmit power and the second transmit power. In some aspects, the transmitting UE may also receive an indication of the second transmit power from a receiving UE such that the second transmit power may be determined in accordance with the capabilities of the receiving UE (e.g., based on an energy harvesting circuit at the UE). The indication of the second transmit power may be an indication of one or more parameters used to determine (e.g., calculate) the second transmit power.