# US 12,015,988 B2 · Dynamic adjustment of transmission parameters

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- Number: US 12,015,988 B2
- Document ID: US12015988B2
- Status: Granted
- Kind: B2
- Application number: 18/178,763
- Filed: 2023-03-06
- Published: 2024-01-04
- Granted: 2024-06-18
- Earliest claimed: 2019-05-31
- Assignees: Apple Inc.
- Applicants: Apple Inc.
- Inventors: Xi Yang; Jianxuan Tu; Qiyang Wu; Peter M. Agboh; Vusthla Sunil Reddy; Mark D. Neumann
- Web page: https://patentgrep.com/patent/US12015988B2

## CPC

- H04W 52/281: {taking into account user or data type priority}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 52/283: {Power depending on the position of the mobile}
- H04W 72/0473: {the resource being transmission power}
- H04W 72/56: based on priority criteria
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Manners of complying with SAR limits at a user equipment (UE) configured to establish a first communication connection using a first radio and a second communication connection using a second radio. The UE determines that a first application associated with the first communication connection is to be prioritized over a second application associated with the second communication connection, determines a specific absorption rate (SAR) value associated with the UE and modifies, responsive to the SAR value associated with the UE, a parameter associated with the first radio or the second radio based on at least the priority of the first application relative to the second application.

## Claims

### Claim 1

A method for wireless communication from a device configured to establish a first communication connection using a first radio and a second communication connection using a second radio, the method comprising:
transmitting a first signal for a first application using the first radio, wherein the first application has a first priority;
transmitting a second signal for a second application using the second radio, wherein the second application has a second priority;
selecting one of the first radio or second radio;
adjusting a transmit parameter for the selected one of the first radio or second radio from a first value to a second value based on the corresponding first priority or second priority and an average specific absorption rate (SAR) value associated with the device during a time window, the time window being based on a predetermined set of criteria; and
transmitting signals from the first radio and the second radio based on the adjusting.

### Claim 2 (depends on 1)

The method of claim 1, wherein the selecting is based on a predetermined condition, wherein the predetermined condition comprises (i) a SAR value exceeds a predetermined threshold, (ii) a difference between the SAR value and a SAR limit exceeds a predetermined threshold, (iii) the SAR value is within a predetermined range of the SAR limit, or (iv) the transmit parameter has been set to the first value for more than a predetermined amount of time.

### Claim 3 (depends on 1)

The method of claim 1, wherein the first priority comprises a higher priority than the second priority and the second radio is the selected one of the first radio or second radio.

### Claim 4 (depends on 3)

The method of claim 3, further comprising:
determining an application preference of the second application; and
selecting the transmit parameter to be adjusted based on the application preference, wherein the transmit parameter is a transmit power or a duty cycle.

### Claim 5 (depends on 4)

The method of claim 4, wherein the application preference is related to latency and wherein the duty cycle of the second radio is adjusted from the first value to the second value, wherein the first value is associated with a shorter duty cycle than the second value.

### Claim 6 (depends on 4)

The method of claim 4, wherein the application preference is related to range and wherein the transmit power of the second radio is adjusted from the first value to the second value, wherein the first value is associated with a higher transmit power than the second value.

### Claim 7 (depends on 1)

The method of claim 1, wherein the first priority comprises a higher priority than the second priority and the first radio is the selected one of the first radio or second radio.

### Claim 8 (depends on 7)

The method of claim 7, further comprising:
determining an application preference of the first application; and
selecting the transmit parameter to be adjusted based on the application preference, wherein the transmit parameter is a transmit power or a duty cycle.

### Claim 9 (depends on 8)

The method of claim 8, wherein the application preference is related to latency and wherein the duty cycle of the first radio is adjusted from the first value to the second value, wherein the first value is associated with a longer duty cycle than the second value.

### Claim 10 (depends on 8)

The method of claim 8, wherein the application preference is related to range and wherein the transmit power of the first radio is adjusted from the first value to the second value, wherein the first value is associated with a lower transmit power than the second value.

### Claim 11

A wireless communication device, comprising:
a first radio configured to establish a first communication connection;
a second radio configured to establish a second communication connection; and
a processor configured to:
configure the first radio to transmit a first signal for a first application, wherein the first application has a first priority;
configure the second radio to transmit a second signal for a second application, wherein the second application has a second priority;
select one of the first radio or second radio;
adjust a transmit parameter for the selected one of the first radio or second radio from a first value to a second value based on the corresponding first priority or second priority and an average specific absorption rate (SAR) value associated with the device during a time window, the time window being based on a predetermined set of criteria; and
configure the first radio and second radio to transmit signals based on the adjusting.

### Claim 12 (depends on 11)

The wireless communication device of claim 11, wherein the selecting is based on a predetermined condition, wherein the predetermined condition comprises (i) a SAR value exceeds a predetermined threshold, (ii) a difference between the SAR value and a SAR limit exceeds a predetermined threshold, (iii) the SAR value is within a predetermined range of the SAR limit, or (iv) the transmit parameter has been set to the first value for more than a predetermined amount of time.

### Claim 13 (depends on 11)

The wireless communication device of claim 11, wherein the first priority comprises a higher priority than the second priority and the second radio is the selected one of the first radio or second radio.

### Claim 14 (depends on 13)

The wireless communication device of claim 13, wherein the processor is further configured to:
determine an application preference of the second application; and
select the transmit parameter to be adjusted based on the application preference, wherein the transmit parameter is a transmit power or a duty cycle.

### Claim 15 (depends on 14)

The wireless communication device of claim 14, wherein the application preference is related to latency and wherein the duty cycle of the second radio is adjusted from the first value to the second value, wherein the first value is associated with a shorter duty cycle than the second value.

### Claim 16 (depends on 14)

The wireless communication device of claim 14, wherein the application preference is related to range and wherein the transmit power of the second radio is adjusted from the first value to the second value, wherein the first value is associated with a higher transmit power than the second value.

### Claim 17 (depends on 11)

The wireless communication device of claim 11, wherein the first priority comprises a higher priority than the second priority and the first radio is the selected one of the first radio or second radio.

### Claim 18 (depends on 17)

The wireless communication device of claim 17, wherein the processor is further configured to:
determine an application preference of the first application; and
select the transmit parameter to be adjusted based on the application preference, wherein the transmit parameter is a transmit power or a duty cycle.

### Claim 19 (depends on 18)

The wireless communication device of claim 18, wherein the application preference is related to latency and wherein the duty cycle of the first radio is adjusted from the first value to the second value, wherein the first value is associated with a longer duty cycle than the second value.

### Claim 20 (depends on 18)

The wireless communication device of claim 18, wherein the application preference is related to range and wherein the transmit power of the first radio is adjusted from the first value to the second value, wherein the first value is associated with a lower transmit power than the second value.