公开(公告)号：US20240214949A1

公开(公告)日：2024-06-27

申请号：US18544768

申请日：2023-12-19

Applicant: QUALCOMM Incorporated

Inventor： Nandhini SRINIVASAN ,  Jagadish NADAKUDUTI ,  Lin LU ,  Paul GUCKIAN

IPC: H04W52/36 ,  H04W52/24

CPC classification number: H04W52/365 ,  H04W52/248

Abstract: Techniques and apparatus for generating a compressed radio frequency (RF) exposure map and using such a compressed RF exposure map for determining a transmit power to meet RF exposure compliance limits are described. An example method generally includes obtaining a first RF exposure map associated with at least one antenna of a wireless device and converting the first RF exposure map to a second RF exposure map. The second RF exposure map is compressed compared to the first RF exposure map. Another example method includes accessing an RF exposure map associated with at least one antenna of the wireless device. The RF exposure map includes a representation of a maximum RF exposure for a region of the RF exposure map. The method also includes transmitting, from the antenna(s), a signal at a transmit power determined based on the RF exposure map in compliance with an RF exposure limit.

公开(公告)号：US20240172126A1

公开(公告)日：2024-05-23

申请号：US18487557

申请日：2023-10-16

Applicant: QUALCOMM Incorporated

Inventor： Jagadish NADAKUDUTI ,  Lin LU ,  Paul GUCKIAN ,  Mingming CAI ,  Junsheng HAN ,  Udara FERNANDO ,  Raghu CHALLA

IPC: H04W52/22 ,  H04B1/3827 ,  H04W52/12

CPC classification number: H04W52/225 ,  H04B1/3838 ,  H04W52/12

Abstract: In certain aspects, a method implemented in a wireless device includes determining a specific absorption rate (SAR) distribution for a first wireless communication technology, determining a power density (PD) distribution for a second wireless communication technology, and combining the SAR distribution and the PD distribution to generate a combined RF exposure distribution. The method also includes determining at least one first maximum allowable power level and at least one second maximum allowable power level for a future time slot based on the combined RF exposure distribution, setting at least one transmission power limit for a first transmitter in the future time slot based on the at least one first maximum allowable power level, and setting at least one transmission power limit for a second transmitter in the future time slot based on the at least one second maximum allowable power level.

公开(公告)号：US20230396279A1

公开(公告)日：2023-12-07

申请号：US18326822

申请日：2023-05-31

Applicant: QUALCOMM Incorporated

Inventor： Lin LU ,  Jagadish NADAKUDUTI ,  Paul GUCKIAN

IPC: H04B1/3827 ,  H04W52/34

CPC classification number: H04B1/3838 ,  H04W52/34

Abstract: Certain aspects of the present disclosure provide techniques for operating a wireless communication device pursuant to radio frequency (RF) exposure across tissues and/or body locations. An example method of wireless communication by a wireless device generally includes tracking a plurality of RF exposures across a plurality of locations associated with a human body over time. The method further includes transmitting a signal at a transmit power determined based at least in part on a time-averaged RF exposure limit and the tracked RF exposures.

公开(公告)号：US20230139016A1

公开(公告)日：2023-05-04

申请号：US18051769

申请日：2022-11-01

Applicant: QUALCOMM Incorporated

Inventor： Jagadish NADAKUDUTI ,  Lin LU ,  Paul GUCKIAN

IPC: H04W52/36 ,  H04W52/22 ,  H04W52/28

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for operating a wireless communication device pursuant to radio frequency (RF) exposure across tissues and/or body locations. An example method of wireless communication by a user equipment generally includes determining a time-averaged RF exposure per exposure scenario or category. The RF exposure for the exposure scenario may be determined for a given antenna or group of antennas, where a grouping of the group of antennas may be specific to the exposure scenario or category. Another example method generally includes tracking sets of RF exposures separately across a plurality of locations associated with a human body over time, and transmitting a first signal at a first transmit power determined based on a time-averaged RF exposure limit and at least one of the tracked RF exposures.

公开(公告)号：US20230138665A1

公开(公告)日：2023-05-04

申请号：US18051847

申请日：2022-11-01

Applicant: QUALCOMM Incorporated

Inventor： Lin LU ,  Jagadish NADAKUDUTI ,  Paul GUCKIAN

IPC: H04W52/36 ,  H04W52/42

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for radio frequency (RF) exposure compliance using device state information (e.g., a device state index (DSI)). Certain aspects may utilize the device information in simultaneous radio transmission scenarios, such as for simultaneous sub-6 GHz and millimeter wave (mmWave) radio transmission scenarios. In some transmission scenarios, the device state information may be applied in real time to account for a lower mmWave RF exposure contribution to the total RF exposure, thereby providing for potentially increased transmission power from the sub-6 GHz radio.

公开(公告)号：US20220070796A1

公开(公告)日：2022-03-03

申请号：US17412143

申请日：2021-08-25

Applicant: QUALCOMM Incorporated

Inventor： Jagadish NADAKUDUTI ,  Lin LU ,  Paul GUCKIAN ,  Troy CURTISS ,  Akhil DEODHAR

IPC: H04W52/38 ,  H04B1/3827 ,  H04W52/22

Abstract: Certain aspects of the present disclosure provide techniques for operating a wireless communication device pursuant to radio frequency (RF) exposure with antenna grouping. An example method of wireless communication by a user equipment generally includes accessing a stored backoff factor associated with an antenna group among a plurality of antenna groups. The method also includes transmitting, from at least one transmit antenna in the antenna group, a signal at a transmission power level based on the backoff factor in compliance with an RF exposure requirement.

公开(公告)号：US20230156625A1

公开(公告)日：2023-05-18

申请号：US17934284

申请日：2022-09-22

Applicant: QUALCOMM Incorporated

Inventor： Tienyow LIU ,  Michel CHAUVIN ,  Farhad MESHKATI ,  Raghu Narayan CHALLA ,  Reza SHAHIDI ,  Arnaud MEYLAN ,  Yahia RAMADAN ,  Jing LIN ,  Tianpei CHEN ,  Jagadish NADAKUDUTI ,  Lin LU ,  Paul GUCKIAN ,  Huang LOU

IPC: H04W52/34 ,  H04W72/04

CPC classification number: H04W52/346 ,  H04W72/0473

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify an available energy for uplink transmission of a plurality of communication links of the UE. The UE may configure, from the available energy, a first set of energy allocations for the plurality of communication links. The UE may configure a second set of energy allocations for one or more communication links of the plurality of communication links, wherein the second set of energy allocations are allocated from a remainder of the available energy after the first set of energy allocations are allocated. The UE may transmit based at least in part on at least one of the first set of energy allocations or the second set of energy allocations. Numerous other aspects are described.

公开(公告)号：US20230122075A1

公开(公告)日：2023-04-20

申请号：US18047845

申请日：2022-10-19

Applicant: QUALCOMM Incorporated

Inventor： Jing LIN ,  Tienyow LIU ,  Raghu Narayan CHALLA ,  Jagadish NADAKUDUTI ,  Lin LU

IPC: H04B7/06 ,  H04W52/36 ,  H04W52/24 ,  H04W52/42

Abstract: Techniques and apparatus for beam selection in compliance with radio frequency (RF) exposure limits. A method that may be performed by a wireless device includes receiving, from another wireless device, a plurality of signals via a plurality of beams; measuring a received signal power for each of the beams, based on the received plurality of signals; determining a transmit power limit for each of the beams based at least in part on an RF exposure limit; determining an estimation of a signal quality at the other wireless device for each of the beams based at least in part the received signal powers and the transmit power limits; selecting one of the beams based on the estimations of the signal qualities for the beams; and transmitting a signal via the selected beam.

公开(公告)号：US20220286974A9

公开(公告)日：2022-09-08

申请号：US17141150

申请日：2021-01-04

Applicant: QUALCOMM Incorporated

Inventor： Jagadish NADAKUDUTI ,  Lin LU ,  Paul GUCKIAN ,  Mingming CAI ,  Junsheng HAN ,  Udara FERNANDO ,  Raghu CHALLA

IPC: H04W52/22 ,  H04B1/3827 ,  H04W52/12

Abstract: In certain aspects, a method implemented in a wireless device includes determining a specific absorption rate (SAR) distribution for a first wireless communication technology, determining a power density (PD) distribution for a second wireless communication technology, and combining the SAR distribution and the PD distribution to generate a combined RF exposure distribution. The method also includes determining at least one first maximum allowable power level and at least one second maximum allowable power level for a future time slot based on the combined RF exposure distribution, setting at least one transmission power limit for a first transmitter in the future time slot based on the at least one first maximum allowable power level, and setting at least one transmission power limit for a second transmitter in the future time slot based on the at least one second maximum allowable power level.

公开(公告)号：US20220086770A1

公开(公告)日：2022-03-17

申请号：US17392442

申请日：2021-08-03

Applicant: QUALCOMM Incorporated

Inventor： Troy CURTISS ,  Akhil DEODHAR ,  Jagadish NADAKUDUTI ,  Lin LU ,  Paul GUCKIAN

IPC: H04W52/24 ,  H04W52/22 ,  H04B17/10 ,  H04L1/00

Abstract: Certain aspects of the present disclosure provide techniques for exception-robust time-averaged radio frequency (RF) exposure compliance continuity. A method that may be performed by a user equipment (UE) generally includes transmitting a first signal at a first transmission power based on time-averaged RF exposure measurements over a time window and storing RF exposure information associated with the time window. The method may also include detecting that an exception event associated with the UE occurred and transmitting a second signal at a second transmission power based at least in part on the stored RF exposure information in response to the detection of the event.