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    Communication via Uplink and Downlink Reflective Devices
    1.
    发明公开
    Communication via Uplink and Downlink Reflective Devices 审中-公开

    公开(公告)号：US20240250741A1

    公开(公告)日：2024-07-25

    申请号：US18157682

    申请日：2023-01-20

    Applicant: Apple Inc.

    Inventor： Sharad Sambhwani ,  Boqiang Fan ,  Ankit Bhamri ,  Mithat C Dogan

    IPC: H04B7/145 ,  H04B7/0426

    CPC classification number: H04B7/145 ,  H04B7/043

    Abstract: A communication system may include a base station (BS), user equipment (UE), and a set of reconfigurable intelligent surfaces (RIS's). The RIS's, the UE, and the BS may communicate using a control RAT and a data RAT. The BS may transmit downlink (DL) signals to the UE device via reflection off a DL RIS. The UE device may transmit uplink (UL) signals to the BS via reflection off a UL RIS. This may optimize wireless performance in situations where reflecting the UL and DL signals off the same RIS would limit performance under the current data RAT channel conditions. The BS and the UE device may use channel measurements of the control RAT at the RIS's to select the UL RIS and the DL RIS. This may significantly reduce overhead required to identify the UL and DL RIS's relative to scenarios where exhaustive beam training is used.

    Communications Systems for Leveraging Beam Squint Effects
    2.
    发明申请
    Communications Systems for Leveraging Beam Squint Effects 有权

    公开(公告)号：US20250105986A1

    公开(公告)日：2025-03-27

    申请号：US18781144

    申请日：2024-07-23

    Applicant: Apple Inc.

    Inventor： Wanlu Sun ,  Mithat C. Dogan ,  Boqiang Fan ,  Sharad Sambhwani

    IPC: H04L5/00 ,  H01Q3/22 ,  H04B7/04 ,  H04B7/06

    Abstract: A communication system may include a wireless base station (BS), one or more user equipment (UE) devices, and optionally one or more reconfigurable intelligent surfaces (RIS's). Phased antenna arrays may be implemented on one or more of these devices. The phased antenna arrays may exhibit beam squint. The beam squint may be leveraged to optimize communications efficiency in the system. For example, a transmit device may leverage beam squint to perform modulation coding scheme (MCS) adjustment, transmit power level adjustment, reference signal allocation, beam width adjustment, frequency domain resource allocation, carrier aggregation band selection, and/or beam management procedures. Beam squint may also be leveraged to ensure that satisfactory communications are maintained between the BS and the UE devices even as the UE devices move over time.

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