Wireless power transfer from a user equipment (UE)

By employing nearby user equipment to assist in wireless power transfer, the method addresses the inefficiencies in current systems, enhancing energy transfer efficiency and supporting the operation of passive IoT devices over greater distances.

WO2025049500A1PCT designated stage expired Publication Date: 2025-03-06QUALCOMM INC
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Patent Information

Application Number
PCT/US2024/044075
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-01
Filing Date
2024-08-27
Publication Date
2025-03-06

AI Technical Summary

Technical Problem

Current wireless communication systems, particularly 5G, face challenges in efficiently supporting passive IoT devices due to distance limitations and energy transfer inefficiencies, which hinder effective power harvesting and communication for devices like RFID tags.

Method used

The proposed solution involves a method where nearby user equipment (UE) devices assist in wireless power transfer to passive IoT devices by controlling channel sensing and scheduling the transmission of an optimized energy waveform, ensuring efficient energy transfer without impacting uplink transmissions.

Benefits of technology

This approach enhances energy transfer efficiency by utilizing nearby UEs to assist in power transfer, overcoming distance limitations and improving the operational range and efficiency of passive IoT devices.

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Abstract

Disclosed are systems and techniques for wireless communications. For example, a first network device can transmit, to second network device(s), a first information signal including information indicating a frequency for a backscattered signal. The first network device can transmit, to a third network device, a second information signal including information indicating a frequency shift for shifting a reference signal to produce the backscattered signal. The first network device can transmit the reference signal to the third network device. The first network device can select, based on channel reports received from the second network device(s), the energy harvesting waveform and at least one second network device for providing the energy harvesting waveform to the third network device. The first network device can transmit, to the at least one second network device, a scheduling signal including scheduling instructions to transmit the energy harvesting waveform to the third network device.
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Citation Information

Patent Citations

  • Subscription based MISO and MIMO wireless energy transfer

    US20150229133A1

  • Wireless power systems including determination of channel transfer function from backscatter signals

    US20200266673A1

  • Methods and apparatus for uplink energy harvesting and signaling

    US20220248432A1

  • Energy-state feedback for efficient wireless power transfer to IoT devices

    US20230254886A1