US 12,757,182 B2 · Techniques for retroreflection beamforming

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment may perform retroreflection on a waveform received from a wireless device (e.g., such as a network entity or a second UE) to assist or perform various operations, such as identifying positioning information of the UE, broadcast signaling, or sidelink relay discovery. For example, the UE may receive control signaling indicating a set of resources during which the UE activates retroreflection communications between the UE and the second wireless device. The UE may monitor the set of resources for a waveform from the second wireless device and transmit a retroreflected signal to the second wireless device based on the received waveform. In this way, the second wireless device may identify a position of the UE based on the retroreflected signal, discover the presence of the UE for broadcast or sidelink relay discovery based on the retroreflected signal, or both.

Claims23

Dependent claims

A first wireless device for wireless communication, comprising:

one or more memories storing processor-executable code;
and
one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first wireless device to:
receive control signaling that indicates a set of resources during which the first wireless device activates retroreflection communications between the first wireless device and a second wireless device;
monitor a first subset of the set of resources for a waveform in accordance with the control signaling;
transmit, via a second subset of the set of resources, a retroreflected signal of the waveform based at least in part on monitoring for the waveform;
and
receive, via a set of sidelink resources, a sidelink control message indicating that the first wireless device is to be a relay in sidelink communications between the first wireless device and the second wireless device, wherein receiving the sidelink control message is based at least in part on transmitting the retroreflected signal of the waveform.

5 more elements

An apparatus for wireless communications, comprising:

one or more memories storing processor-executable code;
and
one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the apparatus to:
transmit control signaling that indicates a set of resources during which a first wireless device activates retroreflection communications between the first wireless device and the apparatus;
transmit, via a first subset of the set of resources, a waveform in accordance with the control signaling;
receive, via a second subset of the set of resources, a retroreflected signal of the waveform based at least in part on transmitting the waveform;
measure positioning information associated with the first wireless device based at least in part on receiving the retroreflected signal of the waveform;
transmit the positioning information associated with the first wireless device based at least in part on measuring the positioning information;
and
transmit, via a set of sidelink resources, a sidelink control message indicating that the first wireless device is to be a relay in sidelink communications. wherein transmitting the sidelink control message is based at least in part on receiving the retroreflected signal of the waveform and the positioning information.

7 more elements

Dependencies are inferred from the claim text.

Techniques for retroreflection beamforming

Life of this patent

Techniques for retroreflection beamforming

Life of this patent

Abstract

Claims23