Wireless Power Transfer Modes for UE Charging and Energy Saving
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Solution Overview
Problem
Wireless communication systems face challenges in managing power transfer and power saving efficiently, particularly in balancing energy-efficient communications with energy harvesting, leading to potential energy wastage and inefficiencies.
Innovation Solution
A network entity configures a UE with a mode of operation that supports energy transfer and charging rates, allowing the UE to manage power efficiently by receiving signals and charging based on network conditions, thereby optimizing energy use and reducing unnecessary energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network entity continuously transmits power transfer signals to the UE, then the UE can maintain charging capability, but energy is wasted during low traffic periods
Solution Approach 1:
The network entity transmits power transfer signals periodically rather than continuously, using on-duration and off-duration cycles. During on-duration, power transfer signals are transmitted to charge the UE's power source. During off-duration, transmission is suspended to save energy. This periodic operation ensures the UE maintains charging capability while avoiding energy wastage during low traffic periods.
Solution Approach 2:
The system dynamically adjusts the on-duration and off-duration parameters based on network conditions, traffic patterns, and UE power needs. The network entity can modify the periodic transmission characteristics in real-time, transitioning between different transmission states to optimize both charging effectiveness and energy efficiency.
2Loss of energy
If the network entity suspends power transfer during low traffic periods, then energy efficiency is improved, but the UE loses charging opportunity
Solution Approach 1:
The network entity implements periodic power transfer with defined on-duration and off-duration cycles. During on-duration periods, power transfer signals are actively transmitted to provide charging opportunities to the UE. During off-duration periods, transmission is suspended to improve energy efficiency. This periodic structure ensures that the UE receives regular charging opportunities while the system maintains high energy efficiency during low traffic periods.
3Use of energy by moving object
If the UE operates in power saving mode, then power consumption is reduced, but data transmission efficiency decreases
Solution Approach 1:
The UE operates in periodic wake-up cycles with on-duration and off-duration periods. During on-duration, the UE is active and can transmit and receive data efficiently. During off-duration, the UE enters a low-power state to reduce consumption. The periodic structure allows the UE to balance power consumption and data transmission efficiency by being active only when needed for communication.
Solution Approach 2:
The network entity and UE use feedback mechanisms to coordinate their operations. The network entity monitors UE activity and power needs, adjusting the periodic transmission parameters accordingly. The UE provides feedback about its power status and data requirements, enabling the network to optimize the balance between power saving and transmission efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive signaling indicating a configuration associated with a first mode of a set of modes. The first mode corresponding to a first transfer supported by a network entity and a first charging rate associated with the first transfer. The UE may receive a signal based on the indicated configuration. The signal may correspond to the first transfer. The UE may charge a source associated with the UE based on the received signal and in accordance with the first charging rate associated with the first transfer.