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KR-20260068131-A - POWER LIMITS BASED ON SIGNAL TYPE FOR MANAGING MAXIMUM PERMISSIBLE EXPOSURE

KR20260068131AKR 20260068131 AKR20260068131 AKR 20260068131AKR-20260068131-A

Abstract

Methods and systems for determining transmit power levels according to signal types and RF exposure limits. An exemplary method generally comprises the steps of determining a first transmit power for transmitting a first type of UL (uplink) signal, determining a second transmit power for transmitting a second type of UL signal based on the first transmit power, and transmitting at least one of the first type of UL signal according to the first transmit power or the second type of UL signal according to the second transmit power.

Inventors

  • 카이, 밍밍
  • 한, 준쉥
  • 찰라, 라구 나라얀
  • 리우, 티엔요
  • 린, 징
  • 나다쿠두티, 자가디쉬
  • 루, 린
  • 메시카티, 파하드

Assignees

  • 퀄컴 인코포레이티드

Dates

Publication Date
20260513
Application Date
20200513
Priority Date
20200512

Claims (20)

  1. As a wireless communication method by UE (user equipment), A step of determining a first transmission power for transmitting a first type of UL (uplink) signal; A step of determining a second transmission power for transmitting a second type of UL signal based on the first transmission power; and The method includes the step of transmitting at least one of the first type UL signal according to the first transmission power or the second type UL signal according to the second transmission power, A wireless communication method by a UE, wherein the first type of UL signal includes a control signal and the second type of UL signal includes a data signal, and at least one of the step of determining the first transmission power or the step of determining the second transmission power is additionally based on RF (radio frequency) exposure limiting for transmitting UL signals by the UE.
  2. In Article 1, A wireless communication method by a UE, wherein the above control signal has a higher priority than the data signal with respect to the transmission power density available for transmission.
  3. In Article 1, A wireless communication method by a UE, wherein the above RF exposure limit includes a PD (power density) limit or a SAR (specific absorption rate) limit.
  4. In Article 1, The step of determining the first transmission power above is: A step of determining a first RF exposure associated with the transmission of the first type of UL signal; and A wireless communication method by a UE, comprising the step of determining the first transmission power based on the determined first RF exposure associated with the transmission of the first type of UL signal.
  5. In Paragraph 4, The step of determining the first transmission power includes the step of determining the maximum transmission power for the first type of UL signal that satisfies the first RF exposure; and A wireless communication method by a UE, wherein the first transmission power includes the maximum transmission power for the first type of UL signal.
  6. In Paragraph 4, The step of determining the second transmission power above is: A step of determining a second RF exposure available for the second type of UL signal based on the first RF exposure; and A wireless communication method by a UE comprising the step of determining the second transmission power based on the determined second RF exposure available for the second type of UL signal.
  7. In Article 6, A wireless communication method by a UE, wherein the second RF exposure available for the second type of UL signal represents the remaining available RF exposure based on the difference between the determined first RF exposure associated with the transmission of the first type of UL signal and the RF exposure limit.
  8. In Article 6, A wireless communication method by a UE, wherein the first RF exposure and the second RF exposure are based at least partially on the priority between the first type of UL signal and the second type of UL signal.
  9. In Article 8, The above-mentioned first type UL signal has a higher priority than the above-mentioned second type UL signal; The first RF exposure is first determined based on the RF exposure limit; and A wireless communication method by a UE, wherein the second RF exposure is determined after the first RF exposure from the remaining available RF exposure based on the difference between the determined first RF exposure and the RF exposure limit associated with the transmission of the first type of UL signal.
  10. In Article 6, A wireless communication method by a UE, wherein the first RF exposure and the second RF exposure are based at least partially on one or more system parameters.
  11. In Article 10, The above one or more system parameters are: The above RF exposure limit; A first traffic condition associated with a first channel for transmitting the above-mentioned first type UL signal; or Second traffic conditions associated with a second channel for transmitting the above-mentioned second type UL signal A wireless communication method by a UE comprising one or more of the following.
  12. In Article 10, A wireless communication method by a UE, further comprising the step of updating at least one of the first RF exposure or the second RF exposure when the above one or more system parameters are updated.
  13. In Article 1, A wireless communication method by a UE, wherein the second transmission power is different from the first transmission power during a time interval.
  14. In Article 1, A wireless communication method by a UE, wherein during a time interval, the sum of the first transmission power and the second transmission power is not greater than the transmission power limit for the time interval.
  15. As a device for wireless communication, At least one processor ― the at least one processor is: Determining a first transmission power for transmitting a first type UL (uplink) signal, and Configured to determine a second transmission power for transmitting a second type UL signal based on the first transmission power above. A transmitter configured to transmit at least one of the first type UL signal according to the first transmission power or the second type UL signal according to the second transmission power; and It includes a memory coupled with at least one processor, and A device for wireless communication, wherein the first type of UL signal includes a control signal and the second type of UL signal includes a data signal, and the at least one processor is further configured to determine at least one of the first transmission power or the second transmission power based on RF (radio frequency) exposure limit for transmitting UL signals by the device.
  16. In Article 15, A device for wireless communication in which the above control signal has a higher priority than the data signal with respect to the transmission power density available for transmission.
  17. In Article 15, A device for wireless communication, wherein the above RF exposure limit includes a PD (power density) limit or a SAR (specific absorption rate) limit.
  18. In Article 15, The above at least one processor is: Determining a first RF exposure associated with the transmission of the above-mentioned first type UL signal; and By determining the first transmission power based on the determined first RF exposure associated with the transmission of the first type of UL signal. A device for wireless communication further configured to determine the first transmission power.
  19. In Article 18, The at least one processor is further configured to determine the first transmission power by determining the maximum transmission power for the first type of UL signal satisfying the first RF exposure; and A device for wireless communication, wherein the first transmission power includes the maximum transmission power for the first type of UL signal.
  20. In Article 18, The above at least one processor is: Based on the first RF exposure above, a second RF exposure available for the second type of UL signal is determined; and By determining the second transmission power based on the determined second RF exposure available for the second type of UL signal A device for wireless communication further configured to determine the second transmission power.

Description

Power limits based on signal type for managing maximum permissible exposure [0001] The present application claims the advantage of U.S. Provisional Application No. 62/852,795 filed on May 24, 2019, and claims priority to U.S. Application No. 15/930,196 filed on May 12, 2020, which claims priority to that Provisional Application, both of which are assigned to the assignee of the present application, and thus the entire contents of those applications are fully described below and are expressly incorporated herein by reference for all applicable purposes. [0002] Specific aspects of the present disclosure generally relate to wireless devices, and more specifically, to systems and methods for signal-type-based power limiting. [0003] Modern wireless devices (such as cellular phones) are generally required to meet RF (radio frequency) exposure limits set by national and international standards and regulations. To ensure compliance with standards, such devices must undergo extensive verification processes before being shipped to the market. To ensure that wireless devices comply with RF exposure limits, technologies have been developed to enable wireless devices to evaluate RF exposure from the wireless device in real time and to appropriately adjust the transmission power of the wireless device to comply with RF exposure limits. [0004] Each of the systems, methods, and devices of the present disclosure has several aspects, and no single aspect of these aspects alone possesses the preferred attributes of the present disclosure. Without limiting the scope of the present disclosure as expressed by the subsequent claims, some features will now be briefly discussed. After considering this discussion, and in particular after reading the section titled “Specifics for carrying out the invention,” those skilled in the art will understand how the features of the present disclosure provide advantages, including enhanced systems and methods for evaluating RF exposure from a wireless device. [0005] Specific aspects of the present disclosure provide a method for wireless communications by user equipment (UE). The method generally comprises the steps of determining a first transmission power for transmitting a first type of uplink (UL) signal, determining a second transmission power for transmitting a second type of UL signal based on the first transmission power, and transmitting at least one of the first type of UL signal according to the first transmission power or the second type of UL signal according to the second transmission power. [0006] Specific aspects of the present disclosure provide an apparatus for wireless communications. The apparatus generally comprises at least one processor configured to determine a first transmission power for transmitting a first type of UL signal and, based on the first transmission power, determine a second transmission power for transmitting a second type of UL signal, and a transmitter configured to transmit at least one of a first type of UL signal according to the first transmission power or a second type of UL signal according to the second transmission power. The apparatus also generally comprises a memory coupled to at least one processor. [0007] Specific aspects of the present disclosure provide an apparatus for wireless communications. The apparatus generally comprises means for determining a first transmission power for transmitting a first type of UL signal, means for determining a second transmission power for transmitting a second type of UL signal based on the first transmission power, and means for transmitting at least one of the first type of UL signal according to the first transmission power or the second type of UL signal according to the second transmission power. [0008] Specific aspects of the present disclosure provide a non-transient computer-readable medium for wireless communications by a UE. The non-transient computer-readable medium generally comprises instructions, the instructions which, when executed by at least one processor, cause at least one processor to determine a first transmission power for transmitting a first type of UL signal, and based on the first transmission power, to determine a second transmission power for transmitting a second type of UL signal, and to control the UE to transmit at least one of the first type of UL signal according to the first transmission power or the second type of UL signal according to the second transmission power. [0009] To achieve the purposes described above and related, one or more aspects include features that are fully described below and, in particular, referred to in the claims. The description below and the accompanying drawings describe specific exemplary features of one or more aspects in detail. However, these features represent only some of the various ways in which the principles of the various aspects may be utilized, and this description is intended to include all such aspects and their equivalents. [