公开(公告)号：US20240258708A1

公开(公告)日：2024-08-01

申请号：US18160245

申请日：2023-01-26

Applicant: Apple Inc.

Inventor： Ahmed M Soliman ,  Danila Zaev ,  Kenza Hamidouche ,  Benedikt Schweizer ,  Ayman F Naguib ,  Norman Goris ,  Said Medjkouh

IPC: H01Q19/10 ,  H04B7/06 ,  H04B7/08

CPC classification number: H01Q19/10 ,  H04B7/0639 ,  H04B7/08

Abstract: A communication system may include a base station (BS), a user equipment (UE) device, a reconfigurable intelligent surface (RIS) having a local controller, and a remote controller. Antenna elements on the RIS may reflect signals between the BS and UE while exhibiting reflection coefficients. The remote controller may transmit a control model and the UE may transmit local information to the local controller, which generates the reflection coefficients based on the local information and control model. Alternatively, the remote controller may transmit the control model to the UE and a codebook to the RIS. The UE may transmit an identifier to the RIS based on local information and the control model. The local controller may implement reflection coefficients of a codebook entry identified by the identifier. Splitting control of the RIS in these ways may minimize communication overhead, provide coverage extension for the UE, and optimize privacy.

公开(公告)号：US20240310470A1

公开(公告)日：2024-09-19

申请号：US18184566

申请日：2023-03-15

Applicant: Apple Inc.

Inventor： Benedikt Schweizer ,  Danila Zaev ,  Firouz Behnamfar ,  Ayman F Naguib

IPC: G01S5/02

CPC classification number: G01S5/0273

Abstract: A communication system may include a transmitting (TX) device, a receiving (RX) device, and a one or more reconfigurable intelligent surfaces (RIS's). The TX device may transmit a wireless signal received by the RX device over multiple propagation paths including paths that reflect off the RIS(s) and paths that include other reflections. The RX device may receive location information from each RIS. The RX device or a control device may control each RIS to modulate the wireless signal with a different respective identifier upon reflection of the wireless signal by the RIS. The RX device may distinguish the wireless signal as reflected off the RIS(s) from reflections off other objects based on the RIS identifiers modulated onto the wireless signals by the RIS(s). The RX device may use a multilateration technique to detect its position based on the received location information and the wireless signals as reflected off the RIS(s).