公开(公告)号：US12225478B2

公开(公告)日：2025-02-11

申请号：US18341561

申请日：2023-06-26

Applicant: QUALCOMM Incorporated

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

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

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：US12021796B2

公开(公告)日：2024-06-25

申请号：US16442360

申请日：2019-06-14

Applicant: QUALCOMM Incorporated

Inventor： Junsheng Han ,  Udara Fernando ,  Lin Lu ,  John Forrester ,  Mingming Cai ,  Tao Luo ,  Raghu Narayan Challa

IPC: H04L5/14 ,  H04B17/10 ,  H04W74/00

CPC classification number: H04L5/14 ,  H04B17/102 ,  H04W74/002

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In certain configurations, the apparatus may be a user equipment (UE). The apparatus may receive configuration information for UL and DL transmissions from another device such as a base station. The apparatus may determine a maximum duty cycle of the UL transmission based on the configuration information. Based on the determined UL maximum duty cycle, the apparatus may determine a transmit power limit for the UL transmission. In one aspect, the apparatus may determine the UL transmit power limit by dividing the power corresponding to a maximum permissible exposure (MPE) limit by the determined maximum UL duty cycle. The apparatus may leverage the forward knowledge of the UL duty cycle to transmit at a power level that complies with the MPE limit while avoiding the poor uplink range associated with static power back-off.

公开(公告)号：US11917461B2

公开(公告)日：2024-02-27

申请号：US17451767

申请日：2021-10-21

Applicant: QUALCOMM Incorporated

Inventor： Arvind Vardarajan Santhanam ,  Raghu Narayan Challa ,  Brian Clarke Banister ,  Troy Curtiss ,  Bhupesh Manoharlal Umatt ,  Ramesh Chandra Chirala ,  Lin Lu

IPC: H04W36/00 ,  H04W52/34

CPC classification number: H04W36/0058 ,  H04W36/0069 ,  H04W36/00837 ,  H04W52/34

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify, while camped on a first cell associated with a first radio access technology (RAT), a power management level for a communication using a second RAT, wherein the power management level indicates an available power for the communication using the second RAT, and wherein the available power is based at least in part on an exposure rate or an absorption rate. The UE may delay a transmission of a measurement report on the first cell based at least in part on the identification of the power management level. Numerous other aspects are provided.

公开(公告)号：US11871355B2

公开(公告)日：2024-01-09

申请号：US17229528

申请日：2021-04-13

Applicant: QUALCOMM Incorporated

Inventor： Farhad Meshkati ,  Alexei Yurievitch Gorokhov ,  Sanghoon Kim ,  Troy Curtiss ,  Dinesh Kumar Devineni ,  Ashok Mantravadi ,  Lin Lu

IPC: H04W52/14 ,  H04W52/36 ,  H04L5/00 ,  H04L25/02 ,  H04W52/42

CPC classification number: H04W52/146 ,  H04L5/0051 ,  H04L25/0226 ,  H04W52/36 ,  H04W52/42

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may transmit a sounding reference signal (SRS) to a base station using an SRS antenna switch (SRS-AS) or an SRS carrier switch (SRS-CS) transmission technique and the UE may feature multiple antenna groups that have separate exposure budgets due to their spatial separation. The UE may employ one or more accounting procedures for tracking energy contributions associated with the SRS across the multiple antenna groups of the UE and may employ one or more power control procedures for setting a transmit power for an uplink signal in accordance with the energy contributions associated with the SRS.

公开(公告)号：US20220330162A1

公开(公告)日：2022-10-13

申请号：US17229528

申请日：2021-04-13

Applicant: QUALCOMM Incorporated

Inventor： Farhad Meshkati ,  Alexei Yurievitch Gorokhov ,  Sanghoon Kim ,  Troy Curtiss ,  Dinesh Kumar Devineni ,  Ashok Mantravadi ,  Lin Lu

IPC: H04W52/14 ,  H04W52/36 ,  H04W52/42 ,  H04L25/02 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may transmit a sounding reference signal (SRS) to a base station using an SRS antenna switch (SRS-AS) or an SRS carrier switch (SRS-CS) transmission technique and the UE may feature multiple antenna groups that have separate exposure budgets due to their spatial separation. The UE may employ one or more accounting procedures for tracking energy contributions associated with the SRS across the multiple antenna groups of the UE and may employ one or more power control procedures for setting a transmit power for an uplink signal in accordance with the energy contributions associated with the SRS.

公开(公告)号：US11457416B2

公开(公告)日：2022-09-27

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: H04B7/00 ,  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：US20170064641A1

公开(公告)日：2017-03-02

申请号：US15052378

申请日：2016-02-24

Applicant: QUALCOMM Incorporated

Inventor： Theodore Logan ,  Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

IPC: H04W52/18 ,  H04W52/36

CPC classification number: H04W52/18 ,  H04W52/226 ,  H04W52/36 ,  H04W52/367

Abstract: Embodiments disclosed herein provide a method and apparatus for optimizing time-averaged transmitter power of a communications device. A time-averaged SAR is computed over a predefined time window using past transmitter power levels with minimum transmitter power equal to reserve transmitter power for any time interval. Based on the time-averaged SAR a maximum allowable transmitter power for a future fixed time interval is determined. The communication device then transmits at a power equal to or less than the maximum allowable transmitter power. The communication device may back off from high transmitter power to a reserve transmitter power when calculated time-averaged SAR approaches the SAR limit. When old high power transmissions expire, the communication device gains SAR margin and may then transmit at high power. The apparatus comprises: at least one antenna, a transmitter in communication with a power supply, a receiver, a timer in communication with a processor, and a memory.

Abstract translation: 本文公开的实施例提供了一种用于优化通信设备的时间平均发射机功率的方法和装置。 使用过去的发射机功率电平在预定义的时间窗口上计算时间平均SAR，其中最小发射机功率等于在任何时间间隔内保留发射机功率。 基于时间平均SAR，确定未来固定时间间隔的最大允许发射机功率。 通信装置然后以等于或小于最大允许发射机功率的功率发射。 当计算的时间平均SAR接近SAR限制时，通信设备可以从高发射机功率退回到预留发射机功率。 当旧的高功率传输过期时，通信设备增加SAR裕度，然后可以以高功率传输。 该装置包括：至少一个天线，与电源通信的发射机，接收机，与处理器通信的定时器和存储器。

公开(公告)号：US09380541B1

公开(公告)日：2016-06-28

申请号：US14728892

申请日：2015-06-02

Applicant: QUALCOMM Incorporated

Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Paul Guckian

IPC: H04B1/10 ,  H04W52/18

CPC classification number: H04W52/18 ,  H04W52/146 ,  H04W52/228 ,  H04W52/288 ,  H04W52/367

Abstract: Embodiments described herein provide a method and apparatus for determining a maximum transmitter power for a mobile device. First, a maximum specific absorption rate (SAR) value is determined. Then, a maximum transmitter power based on the maximum SAR value is determined. The maximum SAR value may be determined using any or all of the following methods: using a composite worst-case SAR map, determining a usage position of the mobile device, and a running average of transmitter power. A further embodiment provides an apparatus for managing transmitter power. The apparatus includes a modem that is in communication with a transmitter; a processor in communication with the modem; and a memory in communication with the processor.

Abstract translation: 本文描述的实施例提供了一种用于确定移动设备的最大发射机功率的方法和装置。 首先确定最大比吸收率（SAR）值。 然后，确定基于最大SAR值的最大发射机功率。 可以使用以下任何一种或全部方法来确定最大SAR值：使用复合最差情况SAR图，确定移动设备的使用位置和发射机功率的运行平均值。 另一实施例提供了一种用于管理发射机功率的装置。 该装置包括与发射机通信的调制解调器; 与调制解调器通信的处理器; 以及与处理器通信的存储器。

公开(公告)号：US20160174168A1

公开(公告)日：2016-06-16

申请号：US14572266

申请日：2014-12-16

Applicant: QUALCOMM Incorporated

Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Paul Guckian

IPC: H04W52/26 ,  H04W24/02

CPC classification number: H04W52/26 ,  H04B7/0604 ,  H04W52/146 ,  H04W52/42

Abstract: A method and apparatus for avoiding transmit power limitations due to specific absorption rate (SAR) constraints. The method maximizes transmit power by transmitting on a first transmitter for a first period of time, second transmitter for a second period of time, through an Nth transmitter for an Nth period of time. The transmission time periods may or may not overlap, and the SAR distributions may or may not overlap. The transmitters may or may not transmit at different frequencies and may or may not share antennas. The average transmit power may be reduced by the number of transmitters that are periodically transmitting. The period of transmission for a given transmitter may be inversely proportional to the measured SAR for that particular transmitter.

Abstract translation: 一种用于避免由特定吸收率（SAR）约束引起的发射功率限制的方法和装置。 该方法通过在第一时间段的第一发射机上发送第二时间段的第二发射机，通过第N个发射机在第N个时间段内使发射功率最大化。 传输时间段可能重叠，也可能不重叠，SAR分布可能重叠或不重叠。 发射机可以或可以不以不同的频率发射，并且可以或可以不共享天线。 平均发射功率可以通过周期性发射的发射机的数量减少。 给定发射机的传输周期可能与该特定发射机的测量SAR成反比。

公开(公告)号：US09083452B2

公开(公告)日：2015-07-14

申请号：US13801328

申请日：2013-03-13

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

IPC: H04B5/00 ,  H04B17/00 ,  H04B1/3827 ,  H04B17/10

CPC classification number: H04B17/10 ,  H04B1/3838 ,  H04B5/0025 ,  H04B5/0043 ,  H04B17/102

Abstract: Efficient techniques for estimating specific absorption rate (SAR) for wireless devices. In an aspect, electric and/or magnetic field measurements are made over a two-dimensional (2D) surface in the proximity of a wireless device. The field measurements are used to generate a near-field equivalent source representation of the wireless device. Specific absorption rate over, e.g., a 1 g/10 g mass may then be calculated by performing electromagnetic simulations using the near-field equivalent source representation. In an aspect, an elementary dipole array may be used to generate the near-field equivalent source representation from the field measurements.

Abstract translation: 用于估计无线设备的特定吸收率（SAR）的高效技术。 在一个方面，在无线设备附近的二维（2D）表面上进行电场和/或磁场测量。 场测量用于生成无线设备的近场等效源表示。 然后可以通过使用近场等效源表示进行电磁模拟来计算例如1g / 10g质量的比吸收率。 在一方面，可以使用基本偶极阵列来从场测量生成近场等效源表示。