# US 11,909,835 B2 · Content transfer using radio frequency sensing

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- Number: US 11,909,835 B2
- Document ID: US11909835B2
- Status: Granted
- Kind: B2
- Application number: 17/478,482
- Filed: 2021-09-17
- Published: 2023-03-23
- Granted: 2024-02-20
- Earliest claimed: 2021-09-17
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Bala Ramasamy; Xiaoxin Zhang; Edwin Chongwoo Park; Danlu Zhang
- Web page: https://patentgrep.com/patent/US11909835B2

## CPC

- G01S 13/56: for presence detection {(presence detection using near field arrangements G01V3/00, e.g. G01V3/08, G01V3/12; burglar, theft or intruder alarms with electrical actuation G08B13/22 - G08B13/26)}
- H04L 67/535: {Tracking the activity of the user (network monitoring arrangements H04L43/00; recording of computer activity G06F11/34)}
- G01S 7/006: {using shared front-end circuitry, e.g. antennas (G01S13/765, G01S13/825 take precedence)}
- H04L 67/52: specially adapted for the location of the user terminal
- H04N 21/42203: {sound input device, e.g. microphone}
- H04N 21/44218: {Detecting physical presence or behaviour of the user, e.g. using sensors to detect if the user is leaving the room or changes his face expression during a TV programme (methods or arrangements for recognising human body or animal bodies or body parts G06V40/10; methods or arrangements for acquiring or recognising human faces, facial parts, facial sketches, facial expressions G06V40/16; methods or arrangements for recognising movements or behaviour G06V40/20; arrangements for identifying users in broadcast systems H04H60/45)}
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

Disclosed are systems and techniques for transferring device content using radio frequency (RF) sensing. For instance, a first wireless device can identify a first user of the first wireless device based on a first radio frequency (RF) signature associated with the first user. The first wireless media device can determine a disengagement of the first user from the first wireless media device. In response to the disengagement, content information associated with usage of the first wireless device by the first user can be captured.

## Claims

### Claim 1

A first wireless device, comprising:
at least one memory;
at least one transceiver; and
at least one processor coupled to the at least one memory and the at least one transceiver, the at least one processor configured to:
obtain a first set of radio frequency (RF) sensing data associated with at least a first received waveform corresponding to a first transmitted waveform reflected off of a first user of the first wireless device;
determine a first RF signature associated with the first user based on the first set of RF sensing data;
identify the first user based on the first RF signature associated with the first user;
determine a disengagement of the first user from the first wireless device;
in response to the disengagement, capture first content information associated with usage of the first wireless device by the first user;
transmit, via the at least one transceiver, the first content information and an indication of the first RF signature associated with the first user to a second wireless device;
obtain a second set of RF sensing data associated with at least a second received waveform corresponding to the first transmitted waveform reflected off of a second user of the first wireless device;
determine a second RF signature associated with the second user based on the second set of RF sensing data, the second RF signature corresponding to second content information associated with a prior use of the first wireless device by the second user;
identify the second user based on the second RF signature associated with the second user; and
output media content that is based on the second content information.

### Claim 2 (depends on 1)

The first wireless device of claim 1, wherein the at least one processor is further configured to:
receive, from a second wireless device, a notification of the disengagement of the first user from the first wireless device; and
determine the disengagement based on the notification.

### Claim 3 (depends on 1)

The first wireless device of claim 1, wherein the first transmitted waveform is transmitted by the second wireless device.

### Claim 4 (depends on 1)

The first wireless device of claim 1, wherein the first transmitted waveform is transmitted by the first wireless device.

### Claim 5 (depends on 1)

The first wireless device of claim 1, wherein the disengagement of the first user corresponds to a movement of the first user away from the first wireless device.

### Claim 6 (depends on 5)

The first wireless device of claim 5, wherein the at least one processor is further configured to:
identify, based on the movement by the first user, the second wireless device, wherein the second wireless device is located in proximity of a projected location of the first user.

### Claim 7 (depends on 1)

The first wireless device of claim 1, wherein, to transmit the first content information to the second wireless device, the at least one processor is further configured to:
transmit, via the at least one transceiver, the first content information to an intermediate wireless device, wherein the intermediate wireless device is configured to forward the first content information to the second wireless device.

### Claim 8 (depends on 1)

The first wireless device of claim 1, wherein, to transmit the first content information, the at least one processor is further configured to:
broadcast, via the at least one transceiver, the first content information to a plurality of wireless devices.

### Claim 9 (depends on 1)

The first wireless device of claim 1, wherein the first content information includes at least one of an application, a media content item, a voice command, an instruction, a timestamp associated with the media content item, a mood, a genre, an environment context, a user context, or any combination thereof.

### Claim 10 (depends on 1)

The first wireless device of claim 1, wherein the at least one processor is further configured to:
determine that the second RF signature associated with the second user of the first wireless device is not distinguishable from the first RF signature associated with the first user; and
determine an updated RF signature for at least one of the first user and the second user, wherein the updated RF signature is based on at least one of a mid-resolution RF sensing algorithm or a high-resolution RF sensing algorithm.

### Claim 11

A method of transferring device content, the method comprising:
obtaining a first set of radio frequency (RF) sensing data associated with at least a first received waveform corresponding to a first transmitted waveform reflected off of a first user of a first wireless device;
determining a first RF signature associated with the first user based on the first set of RF sensing data;
identifying the first user based on the first RF signature associated with the first user;
determining a disengagement of the first user from the first wireless device;
in response to the disengagement, capturing first content information associated with usage of the first wireless device by the first user;
transmitting the first content information and an indication of the first RF signature associated with the first user to a second wireless device;
obtaining a second set of RF sensing data associated with at least a second received waveform corresponding to the first transmitted waveform reflected off of a second user of the first wireless device;
determining a second RF signature associated with the second user based on the second set of RF sensing data, the second RF signature corresponding to second content information associated with a prior use of the first wireless device by the second user;
identifying the second user based on the second RF signature associated with the second user; and
outputting media content that is based on the second content information.

### Claim 12 (depends on 11)

The method of claim 11, further comprising:
receiving, from a second wireless device, a notification of the disengagement of the first user from the first wireless device, wherein the disengagement is determined based on the notification.

### Claim 13 (depends on 11)

The method of claim 11, wherein the first transmitted waveform is transmitted by the second wireless device.

### Claim 14 (depends on 11)

The method of claim 11, wherein the first transmitted waveform is transmitted by the first wireless device.

### Claim 15 (depends on 11)

The method of claim 11, wherein the disengagement of the first user corresponds to a movement of the first user away from the first wireless device.

### Claim 16 (depends on 15)

The method of claim 15, further comprising:
identifying, based on the movement by the first user, the second wireless device, wherein the second wireless device is located in proximity of a projected location of the first user.

### Claim 17 (depends on 11)

The method of claim 11, wherein transmitting the first content information to the second wireless device comprises:
transmitting the first content information to an intermediate wireless device, wherein the intermediate wireless device is configured to forward the first content information to the second wireless device.

### Claim 18 (depends on 11)

The method of claim 11, wherein transmitting the first content information comprises:
broadcasting the first content information to a plurality of wireless devices.

### Claim 19 (depends on 11)

The method of claim 11, wherein the first content information includes at least one of an application, a media content item, a voice command, an instruction, a timestamp associated with the media content item, a mood, a genre, an environment context, a user context, or any combination thereof.

### Claim 20 (depends on 11)

The method of claim 11, further comprising:
determining that the second RF signature associated with the second user of the first wireless device is not distinguishable from the first RF signature associated with the first user; and
determining an updated RF signature for at least one of the first user and the second user, wherein the updated RF signature is based on at least one of a mid-resolution RF sensing algorithm or a high-resolution RF sensing algorithm.

### Claim 21

A non-transitory computer-readable medium comprising at least one instruction for causing a computer or processor to:
obtain a first set of radio frequency (RF) sensing data associated with at least a first received waveform corresponding to a first transmitted waveform reflected off of a first user of a first wireless device;
determine a first RF signature associated with the first user based on the first set of RF sensing data;
identify the first user based on the first RF signature associated with the first user;
determine a disengagement of the first user from the first wireless device;
in response to the disengagement, capture first content information associated with usage of the first wireless device by the first user;
transmit the first content information and an indication of the first RF signature associated with the first user to a second wireless device;
obtain a second set of RF sensing data associated with at least a second received waveform corresponding to the first transmitted waveform reflected off of a second user of the first wireless device;
determine a second RF signature associated with the second user based on the second set of RF sensing data, the second RF signature corresponding to second content information associated with a prior use of the first wireless device by the second user;
identify the second user based on the second RF signature associated with the second user; and
output media content that is based on the second content information.

### Claim 22

An apparatus for transferring device content, comprising:
means for obtaining a first set of radio frequency (RF) sensing data associated with at least a first received waveform corresponding to a first transmitted waveform reflected off of a first user of the apparatus;
means for determining a first RF signature associated with the first user based on the first set of RF sensing data;
means for identifying the first user based on the first RF signature associated with the first user;
means for determining a disengagement of the first user from the apparatus;
means for capturing first content information associated with usage of the apparatus by the first user in response to the disengagement;
means for transmitting the first content information and an indication of the first RF signature associated with the first user to a second wireless device;
means for obtaining a second set of RF sensing data associated with at least a second received waveform corresponding to the first transmitted waveform reflected off of a second user of the apparatus;
means for determining a second RF signature associated with the second user based on the second set of RF sensing data, the second RF signature corresponding to second content information associated with a prior use of the apparatus by the second user;
means for identifying the second user based on the second RF signature associated with the second user; and
means for outputting media content that is based on the second content information.