Beam and surface partition subset selection for a multi-partitioned reconfigurable intelligent surface

Patent metadata

Field	Value
Publication number	US-2025038790-A1
Application number	US-202318360513-A
Country	US
Kind code	A1
Filing date	Jul 27, 2023
Priority date	Jul 27, 2023
Publication date	Jan 30, 2025
Grant date	—

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a reconfigurable intelligent surface (RIS) device may receive a partition configuration indication that is associated with configuring a surface of the RIS device that includes multiple surface partitions, the partition configuration indication associated with activating a first subset of the multiple surface partitions, the first subset of the multiple surface partitions being based at least in part on a location of the first subset on the surface, a geometric shape formed by the first subset, and a beam. The RIS may activate the first subset of the multiple surface partitions. The RIS may deactivate a second subset of the multiple surface partitions, each surface partition in the second subset not being included in the first subset. Numerous other aspects are described.

First claim

What is claimed is:

1 . A reconfigurable intelligent surface (RIS) device for wireless communication, comprising:
one or more memories; and one or more processors, coupled to the one or more memories, configured to:
receive a partition configuration indication that is associated with configuring a surface of the RIS device that includes multiple surface partitions, the partition configuration indication associated with activating a first subset of the multiple surface partitions, the first subset of the multiple surface partitions being based at least in part on a location of the first subset on the surface, a geometric shape formed by the first subset, and a beam;
activate the first subset of the multiple surface partitions; and
deactivate a second subset of the multiple surface partitions, each surface partition in the second subset not being included in the first subset.

2 . The RIS device of claim 1 , wherein the one or more processors are further configured to:
transmit a partition state change request that is associated with changing an operating state of at least one surface partition of the multiple surface partitions,
wherein receiving the partition configuration indication is based at least in part on transmitting the partition state change request.

3 . The RIS device of claim 2 , wherein the partition state change request indicates the at least one surface partition.

4 . The RIS device of claim 2 , wherein the one or more processors are further configured to:
detect a partition change trigger event,
wherein transmitting the partition state change request is based at least in part on detecting the partition change trigger event.

5 . The RIS device of claim 4 , wherein the partition change trigger event comprises at least one of:
detecting an inoperative surface partition of the multiple surface partitions, or a power level satisfying an energy saving mode threshold.

6 . The RIS device of claim 1 , wherein the one or more processors, to receive the partition configuration indication, are configured to:
receive, as at least part of the partition configuration indication, an instruction to reconfigure a respective surface reflection configuration of one or more surface partitions of the first subset of the multiple surface partitions based at least in part on the beam.

7 . The RIS device of claim 6 , wherein the partition configuration indication specifies the first subset of the multiple surface partitions.

8 . The RIS device of claim 6 , wherein the one or more processors are further configured to:
calculate that beamfocusing the beam increases a power level of the beam relative to beamforming the beam; and select the first subset of the multiple surface partitions based at least in part on a beamfocusing configuration that is associated with a distance from the RIS device to an intended recipient device.

9 . The RIS device of claim 8 , wherein the one or more processors are further configured to:
receive an indication of the distance.

10 . The RIS device of claim 9 , wherein the one or more processors are further configured to:
transmit a request for the distance, wherein the one or more processors, to receive the indication of the distance, are configured to:
receive the indication of the distance as a response to the request.

11 . The RIS device of claim 1 , wherein the one or more processors are further configured to:
select the location of the first subset and the geometric shape of the first subset based at least in part on an effect that a combination of the location and the geometric shape have on a power level of the beam.

12 . The RIS device of claim 1 , wherein the one or more processors are further configured to:
select the location of the first subset and the geometric shape of the first subset based at least in part on power consumption by the RIS.

13 . The RIS device of claim 1 , wherein the one or more processors are further configured to:
select a number of the multiple surface partitions to include in the first subset of the multiple surface partitions based at least in part on power consumption by the RIS.

14 . The RIS device of claim 13 , wherein the one or more processors are further configured to:
transmit, to a network node, a partition state change request that indicates the number; and receive an indication of the first subset of the multiple surface partitions, wherein the first subset of multiple partitions is based at least in part on the number.

15 . The RIS device of claim 13 , wherein the one or more processors are further configured to:
select the first subset of the multiple surface partitions based at least in part on the number.

16 . The RIS device of claim 15 , wherein the one or more processors are further configured to:
transmit, to a network node, a partition state change request that indicates the first subset of the multiple surface partitions.

17 . The RIS device of claim 1 , wherein the one or more processors, to deactivate the second subset of the multiple surface partitions, are configured to:
select a respective soft-off configuration for each surface partition of the second subset of the multiple surface partitions; and apply the respective soft-off configuration to each surface partition of the second subset of the multiple surface partitions.

18 . The RIS device of claim 17 , wherein the one or more processors, to select the respective soft-off configuration, are configured to:
select the respective soft-off configuration based at least in part on reflected signal suppression.

19 . The RIS device of claim 17 , wherein the one or more processors are further configured to:
transmit an indication of a soft-off dithering capability; and receive an instruction to deactivate each surface partition of the second subset of the multiple surface partitions based at least in part on using soft-off deactivation.

20 . The RIS device of claim 1 , wherein the one or more processors are further configured to:
receive an indication of an updated reference point; and update a surface reflection configuration for at least one surface partition of the first subset of the multiple surface partitions based at least in part on the updated reference point.

21 . The RIS device of claim 20 , wherein the one or more processors are further configured to:
receive a distance indication that is associated with a focal point that is associated with the updated reference point, wherein the one or more processors, to update the surface reflection configuration, are configured to:
update the surface reflection configuration for the at least one surface partition of the first subset of the multiple surface partitions based at least in part on the distance indication and the updated reference point.

22 . The RIS device of claim 21 , wherein the one or more processors are further configured to:
calculate a propagation direction based at least in part on the distance indication and the updated reference point, wherein the one or more processors, to update the surface reflection configuration, are configured to:
update the surface reflection configuration for the at least one surface partition based at least in part on the propagation direction and beamforming the beam.

23 . The RIS device of claim 21 , wherein the distance indication is a first distance indication, wherein the focal point is a first focal point, and the

Assignees

• Qualcomm Inc

Inventors

• Yapici Yavuz
• Prasad Narayan
• Li Junyi
• Luo Tao

Classifications

• H04B7/0617

  for beam forming · CPC title

• H04B7/04013 Primary

  Intelligent reflective surfaces · CPC title

• H04B7/0695

  using beam selection · CPC title