公开(公告)号：US12149310B2

公开(公告)日：2024-11-19

申请号：US18455059

申请日：2023-08-24

Applicant: QUALCOMM Incorporated

Inventor： Thawatt Gopal ,  Sridhar Bandaru ,  Brian Clarke Banister ,  Reza Shahidi ,  Troy Curtiss ,  Akhil Deodhar ,  Lin Lu ,  Jagadish Nadakuduti

IPC: H04B7/06 ,  H04B7/0456

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an apparatus may determine a time-averaged power limit of a set of antennas. The apparatus may modify an antenna switching configuration based at least in part on the time-averaged power limit. The apparatus may transmit a signal using an antenna, from the set of antennas, associated with the modified antenna switching configuration, wherein the antenna is associated with a higher power limit than one or more other antennas. Numerous other aspects are described.

公开(公告)号：US12143938B2

公开(公告)日：2024-11-12

申请号：US17454614

申请日：2021-11-11

Applicant: QUALCOMM Incorporated

Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Paul Guckian ,  Reza Shahidi

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

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for determining a transmit power based on a pattern and/or future conditions for a transmission while maintaining radio frequency (RF) exposure compliance. An example method generally includes obtaining a pattern associated with one or more first transmissions, determining a transmit power for one or more second transmissions based at least in part on the pattern and an RF exposure limit, and transmitting the one or more second transmissions at the determined transmit power.

公开(公告)号：US11924819B2

公开(公告)日：2024-03-05

申请号：US15930196

申请日：2020-05-12

Applicant: QUALCOMM Incorporated

Inventor： Mingming Cai ,  Junsheng Han ,  Raghu Narayan Challa ,  Tienyow Liu ,  Jing Lin ,  Jagadish Nadakuduti ,  Lin Lu ,  Farhad Meshkati

IPC: H04W72/044 ,  H04W52/36 ,  H04W72/21 ,  H04W72/56

CPC classification number: H04W72/0473 ,  H04W52/367 ,  H04W72/21 ,  H04W72/56

Abstract: Methods and systems for determining transmission power levels according to signal types and RF exposure limits. An example method generally includes 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 UL signal according to the first transmission power or the second UL signal according to the second transmission power.

公开(公告)号：US11871359B2

公开(公告)日：2024-01-09

申请号：US17470534

申请日：2021-09-09

Applicant: QUALCOMM Incorporated

Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Akhil Deodhar ,  Troy Curtiss ,  Paul Guckian

IPC: H04W52/28 ,  H04B1/3827 ,  H04W52/30 ,  H04W88/06

CPC classification number: H04W52/283 ,  H04B1/3838 ,  H04W52/30 ,  H04W88/06

Abstract: Techniques and apparatus for configurable radio frequency (RF) exposure compliance based on region. An example method of wireless communication by a user equipment (UE) generally includes identifying a region in which the UE is located, selecting at least one of a mode or one or more parameters for RF exposure compliance based on the identified region, and transmitting a signal at a transmission power level based at least in part on the at least one of the selected mode or the selected one or more parameters.

公开(公告)号：US11792740B2

公开(公告)日：2023-10-17

申请号：US17949976

申请日：2022-09-21

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian ,  Mingming Cai ,  Junsheng Han ,  Udara Fernando ,  Raghu Challa

IPC: H04M1/00 ,  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：US11716695B2

公开(公告)日：2023-08-01

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 ,  H04L1/00 ,  H04B17/10 ,  H04W52/22

CPC classification number: H04W52/245 ,  H04B17/101 ,  H04L1/0061 ,  H04W52/228

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.

公开(公告)号：US11664841B2

公开(公告)日：2023-05-30

申请号：US17376067

申请日：2021-07-14

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

IPC: H04W52/38 ,  H04B1/3827 ,  H04B17/10

CPC classification number: H04B1/3838 ,  H04B17/104 ,  H04W52/38

Abstract: According to certain aspects a wireless device includes transmitters, and a processor coupled to the transmitters. The processor is configured to determine a radio frequency (RF) exposure value at a peak location based on transmission power levels for the transmitters, determine a contribution of each one of the transmitters to the RF exposure value at the peak location, and reduce the transmission power level for each one of one or more of the transmitters based on the contributions of the transmitters to the RF exposure value at the peak location.

公开(公告)号：US10652833B2

公开(公告)日：2020-05-12

申请号：US16460894

申请日：2019-07-02

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian ,  Mingming Cai ,  Junsheng Han ,  Udara Fernando ,  Raghu Challa

IPC: H04B7/00 ,  H04W52/22 ,  H04W52/12 ,  H04B1/3827

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：US10447413B1

公开(公告)日：2019-10-15

申请号：US16189274

申请日：2018-11-13

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

IPC: H04W52/02 ,  H04B17/10 ,  H04W52/22 ,  H04B1/3827 ,  H04W52/36 ,  H04B17/40

Abstract: Methods and systems for assessing radio frequency (RF) exposure from a wireless device. An example apparatus generally includes at least one processor configured to determine a time-averaged radio frequency (RF) exposure measurement over a time window, comprising a number of time slots, accounting for a future time slot; determine a maximum allowed transmission power level for the future time slot based on a reduced power limit and the time-averaged RF exposure measurement, the reduced power limit being less than a transmission power limit for the time window; and set a transmission power level for the future time slot based on the maximum allowed transmission power level. The example apparatus also includes an interface configured to output one or more signals for transmission during the future time slot at the transmission power level.

公开(公告)号：US09237531B2

公开(公告)日：2016-01-12

申请号：US13801232

申请日：2013-03-13

Applicant: QUALCOMM Incorporated

Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Paul Guckian

IPC: H04B7/00 ,  H04W52/36

CPC classification number: H04W52/367

Abstract: Efficient techniques for determining compliance of a wireless device with radio-frequency (RF) exposure standards and regulations. In an aspect, two-dimensional surface scans of a device are determined and stored in a memory during a certification phase. Each scan corresponds to a basis surface scan wherein only one transmitter and one antenna of the device are active. During real-time operation, the basis surface scans corresponding to the real-time active transmitters and antennas of the device are retrieved. The retrieved scans are processed according to the real-time operating parameters to determine an estimated RF exposure metric, e.g., a peak specific absorption rate (SAR). The transmit power levels of the device may be adjusted in real time to ensure compliance of the estimated RF exposure metric with applicable standards and regulations.

Abstract translation: 确定无线设备符合射频（RF）暴露标准和法规的有效技术。 在一方面，设备的二维表面扫描在认证阶段被确定并存储在存储器中。 每个扫描对应于基础表面扫描，其中只有一个发射机和一个天线的设备是活动的。 在实时操作期间，检索对应于实时有源发射机和设备天线的基础表面扫描。 根据实时操作参数来处理检索的扫描以确定估计的RF暴露度量，例如峰值比吸收率（SAR）。 可以实时调整设备的发射功率电平，以确保估计的RF辐射度量符合适用的标准和规定。