公开(公告)号：US20170086086A1

公开(公告)日：2017-03-23

申请号：US14862985

申请日：2015-09-23

Applicant: QUALCOMM Incorporated

Inventor： Ashok BHATIA ,  Vishal AGARWAL ,  Dominic Gerard FARMER ,  Carlos Horacio ALDANA

IPC: H04W24/10 ,  H04L12/26 ,  H04W72/00

CPC classification number: H04W24/10 ,  H04L43/0864 ,  H04W64/00 ,  H04W72/005

Abstract: In one aspect, a method performed by an access point in a wireless local area network (WLAN), includes receiving a first ranging request message from a first device and monitoring for a second ranging request message from a second device on a channel of the WLAN. The first ranging request message includes a device identifier of the first device and the second ranging request message includes a device identifier of the second device. In response to receiving the second ranging request message, the access point combines the device identifier of the first device, first timing information associated with the first ranging request message, the device identifier of the second device, and second timing information associated with the second ranging request message into a single ranging response message. The access point then broadcasts the single ranging response message on the channel of the WLAN.

公开(公告)号：US20250133614A1

公开(公告)日：2025-04-24

申请号：US18492684

申请日：2023-10-23

Applicant: QUALCOMM Incorporated

Inventor： Vishal AGARWAL ,  Manish RAO ,  Ravi SHEKHAR ,  Mayank BATRA

IPC: H04W76/14 ,  H04W80/02

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first peripheral device may receive, at a controller layer from a host layer, a command for information from a second peripheral device associated with the first peripheral device. The first peripheral device may provide, from the controller layer to the host layer, the information from local information stored at the first peripheral device. Numerous other aspects are described.

公开(公告)号：US20230137847A1

公开(公告)日：2023-05-04

申请号：US18148837

申请日：2022-12-30

Applicant: QUALCOMM Incorporated

Inventor： Giriraj GOYAL ,  Vishal AGARWAL ,  Steven SINGER

IPC: H04W28/04 ,  H04W12/033

Abstract: The disclosure relates generally to wireless communication, and more particularly to selective relay of data packets. A method includes receiving one or more received data packets from a series of transmitted data packets that are transmitted from a host device over a host piconet during a plurality of listening time slots of the host piconet; receiving a bitmap over a primary/secondary piconet, wherein the bitmap includes a plurality of bitmap portions and each bitmap portion respectively corresponds to one of the plurality of listening time slots of the host piconet; analyzing the received bitmap to identify one or more missed data packets from the series of transmitted data packets that were not received from the host device; and generating a relay list of missed data packets based on the analyzing of the bitmap.

公开(公告)号：US20190261293A1

公开(公告)日：2019-08-22

申请号：US16402203

申请日：2019-05-02

Applicant: QUALCOMM Incorporated

Inventor： Jie WU ,  Daniel Fred FILIPOVIC ,  Emilija Milorad SIMIC ,  Vishal AGARWAL

IPC: H04W56/00 ,  G01S19/23 ,  H03L1/02

Abstract: System and method for temperature-calibration of a crystal oscillator (XO) in a mobile device. A temperature-calibration status of the XO is determined and a trigger condition related to temperature-calibration of the XO is detected. If the temperature-calibration status of the XO is not fully temperature-calibrated or if the XO has not been previously temperature-calibrated, a temperature-calibration session is initiated by an XO manager based on the condition, wherein a receiver is configured to receive signals and temperature-calibration of the XO is performed in a background mode based on the received signals. The condition based triggering ensures that the XO is temperature-calibrated prior to launch of any position based or global navigation satellite systems (GNSS) based applications on the mobile device. The trigger condition can include first use or power-on, charging, presence in an outdoor environment, variation in operating temperature, pre-specified time, and/or user input pertaining to the mobile device.

公开(公告)号：US20180292522A1

公开(公告)日：2018-10-11

申请号：US15481738

申请日：2017-04-07

Applicant: QUALCOMM Incorporated

Inventor： Dirceu CAVENDISH ,  Ashok BHATIA ,  Nicolas GRAUBE ,  Vishal AGARWAL

IPC: G01S13/76 ,  H04W64/00 ,  H04L5/00 ,  G01S13/06 ,  G01S13/534 ,  H04W84/12 ,  G01S13/42 ,  H04B5/00 ,  H04L12/26 ,  G01S5/14

CPC classification number: G01S13/765 ,  G01S5/14 ,  G01S13/06 ,  G01S13/426 ,  G01S13/534 ,  H04B5/0043 ,  H04L5/0055 ,  H04L9/3247 ,  H04L9/3297 ,  H04L43/10 ,  H04L63/12 ,  H04L2209/80 ,  H04W12/00502 ,  H04W12/06 ,  H04W64/003 ,  H04W64/006 ,  H04W84/12

Abstract: Disclosed are methods, devices, systems, apparatus, servers, media, and other implementations, including a method, performed at a first wireless device, for secure range determination that includes transmitting a first signed message at a first time instance, with the first signed message, including a first payload, configured to be received by a second wireless device at a second time instance, and receiving at a fourth time instance a verifiable acknowledgement message transmitted from the second wireless device at a third time instance in response to the first signed message. The method further includes verifying that the verifiable acknowledgement message originated from the second wireless device, and, responsive to a verification that the verifiable acknowledgement message originated from the second wireless device, transmitting a second signed message including a second payload with at least timing information for the first time instance and the fourth time instance.

公开(公告)号：US20160049945A1

公开(公告)日：2016-02-18

申请号：US14827192

申请日：2015-08-14

Applicant: QUALCOMM Incorporated

Inventor： Vishal AGARWAL ,  Mahadevan Srinivasan

IPC: H03L1/02

CPC classification number: H03L1/028 ,  H03B5/04 ,  H03L1/02

Abstract: In some examples, compensating for hysteretic characteristics of a crystal oscillator in a timing circuit includes obtaining a plurality of successive temperature measurements. From the plurality of successive temperature measurements, a temperature gradient having a sign and a magnitude can be determined. A frequency compensation parameter can then be determined based on any combination of two or more factors chosen from a set of factors including a temperature measurement, the sign of the temperature gradient, and the magnitude of the temperature gradient. A frequency error of the timing circuit can then be compensated based on the frequency compensation parameter.

Abstract translation: 在一些示例中，补偿定时电路中的晶体振荡器的滞后特性包括获得多个连续的温度测量。 从多个连续的温度测量可以确定具有符号和幅度的温度梯度。 然后可以基于从包括温度测量，温度梯度的符号和温度梯度的幅度的一组因素中选择的两个或多个因子的任何组合来确定频率补偿参数。 然后可以基于频率补偿参数补偿定时电路的频率误差。

公开(公告)号：US20140004887A1

公开(公告)日：2014-01-02

申请号：US13774342

申请日：2013-02-22

Applicant: QUALCOMM INCORPORATED

Inventor： Dominic Gerard FARMER ,  Vishal AGARWAL ,  Emilija Milorad SIMIC ,  Daniel Fred FILIPOVIC ,  Sasidhar MOWA

IPC: H03L1/02 ,  G01S19/23

CPC classification number: H04W56/00 ,  G01S19/235 ,  H03L1/022

Abstract: Systems and methods for temperature-calibration of an uncompensated XO in a mobile device during mobile device operation. The XO is temperature-calibrated based on assistance from wireless signals, such as from satellite source, and optionally from terrestrial sources such as WWAN, CDMA, etc. Based on one or more received wireless signals received at a receiver, corresponding frequency estimates of the XO are obtained and correlated with corresponding operating temperatures in a processor. Based on one or more samples of frequency estimates and associated temperatures, the XO is temperature-calibrated in the processor wherein a frequency-temperature (FT) model is formulated for the XO. The frequency of the temperature-calibrated XO can be determined from the FT model at any given temperature.

Abstract translation: 用于移动设备操作期间移动设备中未补偿的XO的温度校准的系统和方法。 基于来自无线信号（例如来自卫星源）和可选地从诸如WWAN，CDMA等地面源的无线信号进行温度校准。基于在接收机处接收到的一个或多个接收到的无线信号，相应的频率估计 获得XO并与处理器中的对应操作温度相关联。 基于频率估计和相关温度的一个或多个样本，XO在处理器中被温度校准，其中为XO制定了频率 - 温度（FT）模型。 温度校准XO的频率可以在任何给定温度下从FT模型确定。

公开(公告)号：US20210160009A1

公开(公告)日：2021-05-27

申请号：US16693083

申请日：2019-11-22

Applicant: QUALCOMM Incorporated

Inventor： Giriraj GOYAL ,  Vishal AGARWAL

IPC: H04L1/00 ,  H04L5/00 ,  H04L1/08 ,  H04L12/823 ,  H04L29/06

Abstract: Apparatus, methods, and computer-readable media for an error correction technique that identifies transmission errors and corrective actions to maintain a link are disclosed herein. An example method of wireless communications includes receiving a first PDU comprising at least one of a SEQN bit or a packet counter value. The example method includes determining whether a value of the SEQN bit of the received first PDU is an expected SEQN or an unexpected SEQN. The example method includes calculating a MIC of the received first PDU. The example method includes determining whether the received first PDU is a re-transmission of a previous PDU or the received first PDU comprising errors. The example method includes transmitting an ACK or a NACK in response to the determination of whether the first PDU is the re-transmission of the previous PDU or the first PDU comprising errors.

公开(公告)号：US20210022207A1

公开(公告)日：2021-01-21

申请号：US16946454

申请日：2020-06-23

Applicant: QUALCOMM Incorporated

Inventor： Jagdeep Kumar HANS ,  Vishal AGARWAL

IPC: H04W84/18 ,  H04W40/24 ,  H04W40/02 ,  H04L12/751

Abstract: A method for wireless communications in a mesh network at a first device is disclosed. The method includes receiving, during a friendship termination procedure, direct forwarding information from a second device and storing the directed forwarding information from the second device. The method also includes terminating the friendship with the second device and establishing a friendship with a third device. The method also includes transmitting the directed forwarding information to the third device.

公开(公告)号：US20190007866A1

公开(公告)日：2019-01-03

申请号：US15636266

申请日：2017-06-28

Applicant: QUALCOMM Incorporated

Inventor： Vishal AGARWAL ,  Mayank BATRA

IPC: H04W28/06 ,  H04W28/04

Abstract: In a wireless communications system, packet error rate may be relatively low (e.g., five percent). Accordingly, receivers may successfully receive a first transmission the majority of the time. However, bandwidth may be used for retransmissions, which may be used relatively infrequently. Because retransmission packets do not necessarily have to be the same as transmission packets, transmission packets may be given more weight than retransmission packets. For example, transmission packets may be encoded with a higher bitrate than retransmission packets. In aspects, a transmitter may send a first transmission packet, including first data encoded with a first bitrate, and send a second transmission packet, including second data encoded with the first bitrate. The transmitter may send a first retransmission packet that includes the first data encoded with a second bitrate and the second data encoded with the second bitrate, and the first bitrate may be higher than the second bitrate.