KR-20260066075-A - Method and apparatus for compliance with radio frequency exposure limits considering total energy specifications

Abstract

Certain embodiments of the present disclosure provide techniques and apparatus for complying with multiple radio frequency exposure limits. An exemplary method of wireless communication includes the step of obtaining scaling information indicating the relationship between a first radio frequency (RF) exposure limit and a second RF exposure limit. The method further includes the step of transmitting a signal at a transmission power determined at least partially based on the maximum allowable transmission power for a time interval and the scaling information.

Inventors

• 나다쿠두티, 자가디시
• 루, 린
• 구키안, 폴

Assignees

• 퀄컴 인코포레이티드

Dates

Publication Date

20260512

Application Date

20240815

Priority Date

20230920

Claims (20)

1. As a method of wireless communication by a wireless device, A step of obtaining scaling information indicating the relationship between a first radio frequency (RF) exposure limit and a second RF exposure limit; and A method comprising the step of transmitting a signal with a transmission power determined at least partially based on the maximum allowable time-averaged transmission power for a time interval and the scaling information.
2. A method according to claim 1, wherein the first RF exposure limit includes total RF exposure for transmission intervals of less than a specified duration, and the second RF exposure limit includes a time-averaged RF exposure limit.
3. A method according to paragraph 2, wherein the scaling information comprises a coefficient corresponding to a first ratio associated with the first RF exposure limit and a second ratio associated with the second RF exposure limit.
4. In paragraph 3, the method wherein the coefficient is the ratio of the first ratio to the second ratio.
5. In paragraph 3, the method is a second ratio which is a quotient obtained by dividing the peak transmission power by the maximum time-averaged transmission power level.
6. In paragraph 3, the method in which the first ratio depends on the second ratio.
7. In paragraph 1, A step of adjusting the normalized power report and the maximum allowable time-averaged transmission power in a time window associated with the second RF exposure limit based on the scaling information; and A method further comprising the step of determining the transmission power based at least partially on the adjusted normalized power report and the adjusted maximum allowable time-averaged transmission power.
8. In paragraph 7, the step of adjusting the normalized power report and the maximum allowable time-averaged transmission power is A step of scaling the normalized power report by a first coefficient of the scaling information—wherein the first coefficient corresponds to a first ratio of the first transmission power to the maximum time-averaged transmission power level—; and A method comprising the step of scaling the maximum allowable time-averaged transmission power by a second coefficient of the scaling information, wherein the second coefficient corresponds to a second ratio of the second transmission power to the maximum time-averaged transmission power level.
9. A method according to claim 8, wherein at least one of the first ratio or the second ratio is based on the sum of transmission powers associated with a plurality of transmissions.
10. A method according to claim 1, wherein the step of transmitting the signal comprises the step of transmitting the signal at the transmission power for a duration that complies with the first RF exposure limit.
11. In claim 10, the method wherein the duration corresponds to the highest ratio of the peak transmission power to the maximum time-averaged transmission power level supported by the wireless device.
12. A method according to claim 1, wherein the scaling information is based on a regulatory value for the second RF exposure limit regardless of the backoff applied to the second RF exposure limit.
13. A method according to claim 1, wherein the scaling information is at least partially based on an approximation function for the first RF exposure limit that is less than the regulation function for the first RF exposure limit.
14. As a method of wireless communication by a wireless device, A step of obtaining scaling information indicating the relationship between a first radio frequency (RF) exposure limit and a second RF exposure limit; and A method comprising the step of transmitting a signal with a transmission power determined at least partially based on a maximum allowable time averaged transmission power and the scaling information, wherein the transmission power is less than or equal to the maximum allowable time averaged transmission power scaled by a coefficient associated with the first RF exposure limit.
15. In paragraph 14, the method comprises the scaling information including the coefficient associated with the first RF exposure limit.
16. In paragraph 15, the method, wherein the coefficient corresponds to the ratio associated with the first RF exposure limit.
17. In paragraph 14, the determination of the transmission power is unrelated to the time-averaged RF exposure evaluation of one or more transmission powers of the wireless device.
18. As a device for wireless communication, One or more memories that collectively store computer-executable instructions; and The device comprises one or more processors coupled to the one or more memories, wherein the one or more processors are collectively configured to execute the computer-executable instructions to cause the device to perform an operation, and the operation is, Acquiring scaling information indicating the relationship between a first radio frequency (RF) exposure limit and a second RF exposure limit, and A device comprising controlling the transmission of a signal at a transmission power determined at least partially based on the maximum allowable time-averaged transmission power for a time interval and the scaling information.
19. A device according to claim 18, wherein the first RF exposure limit comprises total RF exposure for transmission intervals of less than a specified duration, and the second RF exposure limit comprises time-averaged RF exposure limits.
20. In claim 19, the device comprises, wherein the scaling information includes a coefficient corresponding to a first ratio associated with the first RF exposure limit and a second ratio associated with the second RF exposure limit.

Description

Method and apparatus for compliance with radio frequency exposure limits considering total energy specifications Cross-reference to related application(s) This patent application claims the benefit of U.S. Patent Application No. 18/471,134 filed September 20, 2023, the entirety of which is incorporated herein by reference. Technology field The aspects of the present disclosure relate to wireless communication, and more specifically to radio frequency (RF) exposure compliance. Wireless communication systems are widely deployed to provide various communication services such as telephony, video, data, messaging, and broadcasting. Modern wireless communication devices (e.g., cellular phones) are generally required to meet radio frequency (RF) exposure limits set by specific governments and international standards and regulations. To ensure compliance with standards, such devices may undergo an extensive certification process before being released to the market. To ensure that wireless communication devices comply with RF exposure limits, techniques have been developed to enable the wireless communication device to evaluate RF exposure and, accordingly, adjust its transmit power to ensure compliance. Some embodiments provide a method of wireless communication by a wireless device. The method comprises the step of obtaining scaling information indicating a relationship between a first radio frequency (RF) exposure limit and a second RF exposure limit. The method further comprises the step of transmitting a signal with a transmission power determined at least partially based on the maximum allowable time-averaged transmission power for a time interval and the scaling information. Some embodiments provide a device for wireless communication. The device includes one or more memories that collectively store computer-executable instructions. The device also includes one or more processors coupled to one or more memories. One or more processors are collectively configured to execute computer-executable instructions that cause the device to perform an operation. The operation includes obtaining scaling information indicating a relationship between a first RF exposure limit and a second RF exposure limit. The operation also includes controlling the transmission of a signal at a transmission power determined at least partially based on the maximum allowable time-averaged transmission power for a time interval and the scaling information. Some embodiments provide a device for wireless communication. The device includes means for obtaining scaling information indicating the relationship between a first RF exposure limit and a second RF exposure limit. The device further includes means for transmitting a signal with a transmission power determined at least partially based on the maximum allowable time-averaged transmission power for a time interval and the scaling information. Some embodiments provide a computer-readable medium. The computer-readable medium has stored instructions, and when executed by a device, the instructions cause the device to perform a method. The method comprises the step of obtaining scaling information indicating a relationship between a first RF exposure limit and a second RF exposure limit. The method further comprises the step of transmitting a signal with a transmission power determined at least partially based on the maximum allowable time-averaged transmission power for a time interval and the scaling information. Some embodiments provide a method of wireless communication by a wireless device. The method comprises the step of obtaining scaling information indicating a relationship between a first radio frequency (RF) exposure limit and a second RF exposure limit. The method also comprises the step of transmitting a signal at a transmission power determined at least partially based on the maximum allowable time-averaged transmission power and the scaling information. The transmission power is less than or equal to the maximum allowable time-averaged transmission power scaled by a factor associated with the first RF exposure limit. Some embodiments provide a device for wireless communication. The device includes one or more memories that collectively store computer-executable instructions. The device also includes one or more processors coupled to one or more memories. One or more processors are collectively configured to execute computer-executable instructions that cause the device to perform an operation. The operation includes obtaining scaling information indicating a relationship between a first radio frequency (RF) exposure limit and a second RF exposure limit. The operation also includes transmitting a signal at a maximum allowable time-averaged transmission power and a transmission power determined at least partially based on the scaling information. The transmission power is less than or equal to the maximum allowable time-averaged transmission power scaled by a factor associated with