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公开(公告)号：US11218876B2
公开(公告)日：2022-01-04
申请号：US15883785
申请日：2018-01-30
Applicant: Apple Inc.
Inventor： Shang-Te Yang , Xu Chen , Alejandro J. Marquez , Mohit Narang , Indranil S. Sen
Abstract: Wireless communication between two electronic devices may be used to determine a distance between the two devices, even in the presence of an otherwise-disruptive attacker. A wireless receiver system of one device may receive a true wireless ranging signal from a first transmitting device and a false wireless ranging signal from an attacker. The wireless receiver system may correlate the wireless signals with a known preamble sequence and perform channel estimation using the result, obtaining a channel impulse response for the wireless signals. The wireless receiver system may filter the channel impulse response for the plurality of wireless signals by removing at least part of the channel impulse response due to the false wireless ranging signal while not removing at least part of the channel impulse response due to the true wireless ranging signal. The receiver system may perform a wireless ranging operation using the filtered channel impulse response.
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公开(公告)号：US11150717B2
公开(公告)日：2021-10-19
申请号：US16569383
申请日：2019-09-12
Applicant: Apple Inc.
Inventor： Diego C. Hernandez , Harneet Singh Oberoi , Indranil S. Sen , Kevin C. Camilleri , Raghuram C. Kamath , Vusthla Sunil Reddy
IPC: G06F1/00 , G06F1/3212 , G06F1/3234 , G06F1/3203 , G06F1/26
Abstract: A technique for dynamically adjusting power use of an input/output (I/O) interface of an electronic device is provided. The electronic device includes an input/output (I/O) interface that facilitates electronic communications with a receiving electronic device, at a particular transmission rate that is dynamically changeable by the electronic device. Transmission power and transmission rate adjustment circuitry determines whether a step-down in a transmission power used for signal transmission at the particular transmission rate is desirable. When desirable, the transmission power is dynamically adjusted down one step, such that less power is used by the I/O interface during the electronic communications.
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公开(公告)号：US10784931B2
公开(公告)日：2020-09-22
申请号：US16003986
申请日：2018-06-08
Applicant: Apple Inc.
Inventor： Raghuram C. Kamath , Diego C. Hernandez , Harneet Singh Oberoi , Indranil S. Sen
IPC: H04W72/14 , H04B7/0452 , H04L29/06 , H04W40/04 , H04W84/12
Abstract: Systems, methods, and devices for grouping client devices based on sensor data in an assisted wireless communication system are provided. Sensor data may include device mobility, device type, and device application data usage, among other characteristics. An assisted wireless communication system may include client devices sending data to an access point. The clients may send conventional protocol data over a channel and, concurrently, send sensor data over an alternative channel. In some cases, client devices may exchange their protocol data, modify their own protocol data based on the exchanged data, and send the modified protocol data to the access point. This may allow the clients to adjust their grouping.
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公开(公告)号：US20200067565A1
公开(公告)日：2020-02-27
申请号：US16106354
申请日：2018-08-21
Applicant: Apple Inc.
Inventor： Xiaoming Yu , Alejandro J. Marquez , Indranil S. Sen , Peter M. Agboh , Shang-Te Yang , Vusthla Sunil Reddy
IPC: H04B1/7103
Abstract: Methods and apparatuses are presented to reduce multiuser interference resulting from two or more overlapping ultra wideband (UWB) transmissions by randomizing the start time of packets and/or bursts within the packets. A random offset time may be generated for a packet, and transmission of the packet may be arbitrarily delayed by that random offset time, relative to an earlier time at which the packet is prepared for transmission. A random offset time may be generated for a pulse burst within a symbol of a packet, and transmission of the burst may be delayed by that random offset time, relative to a nominal transmission window within the symbol. The burst may therefore occupy a portion of a guard period following the nominal transmission window. Either procedure, or both procedures, may be used to reduce multiuser interference between two concurrently transmitted packets by randomizing overlap occurring between the bursts.
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公开(公告)号：US10477741B1
公开(公告)日：2019-11-12
申请号：US15019607
申请日：2016-02-09
Applicant: Apple Inc.
Inventor： Mun Soo Bae , Bing Jiang , Haejoon Jung , Indranil S. Sen , Mohit Narang , Ruben Caballero
IPC: H05K9/00
Abstract: An inductive power transmission system electromagnetic field shielding apparatus includes an enclosure. The enclosure is configured to surround an electronic device and an inductive power transmitter that inductively transmits power to the electronic device. A communication window or high pass filter is formed in the enclosure. The communication window may include an arrangement of one or more conductive materials defining one or more apertures. The enclosure and the communication window block passage of magnetic flux generated by the inductive power transmitter. The communication window allows passage of communication transmissions associated with the electronic device.
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Patent Agency Ranking
公开(公告)号：US10158997B2
公开(公告)日：2018-12-18
申请号：US15468016
申请日：2017-03-23
Applicant: Apple Inc.
Inventor： Alejandro J. Marquez , Tushar R. Shah , Mohit Narang , Indranil S. Sen , Shang-Te Yang
Abstract: A wireless network may include devices that wirelessly transmit and receive packets. Each packet may include a preamble, a start-of-frame delimiter, a physical layer header, a sequence of symbols between the start-of-frame delimiter and the physical layer header, and a data payload. The sequence of symbols may have a pattern that is resistant to spoofing attacks. A receiving device may have a correlator that correlates known symbols against the symbols in the sequence using overlapping three-symbol-length correlation windows. Early arrival peaks in the output of the correlator may be used to correct time stamp information in the packets and late arrival peaks corresponding to spoofed signals from an attacker may be ignored. Time stamp information may be processed to determine ranges between transmitting and receiving devices.
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公开(公告)号：US10063964B2
公开(公告)日：2018-08-28
申请号：US15446793
申请日：2017-03-01
Applicant: Apple Inc.
Inventor： Ruben Caballero , Michael DiVincent , Indranil S. Sen , Robert W. Schlub , Mohit Narang , Ricardo R. Velasco , Christopher B. Crowe , Scott Vernon
CPC classification number: H04R3/00 , G01S7/539 , G01S15/02 , H04B1/0343 , H04B1/3838 , H04B1/385 , H04M2250/12 , H04W52/0209 , H04W52/282 , Y02D70/00 , Y02D70/142 , Y02D70/144 , Y02D70/164 , Y02D70/166 , Y02D70/23 , Y02D70/26 , Y02D70/40
Abstract: An electronic device may include wireless circuitry that is configured to transmit wireless signals during operation. A maximum transmit power level may be established that serves as a cap on how much power is transmitted from the electronic device. Adjustments may be made to the maximum transmit power level in real time based on sensor signals and other information on the operating state of the electronic device. The sensor signals may include motion signals from an accelerometer. The sensor signals may also include ultrasonic sound detected by a microphone. Device orientation data may be used by the device to select whether to measure the ultrasonic sound using a front facing or rear facing microphone. Maximum transmit power level may also be adjusted based on whether or not sound is playing through an ear speaker in the device.
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公开(公告)号：US20180091952A1
公开(公告)日：2018-03-29
申请号：US15619171
申请日：2017-06-09
Applicant: Apple Inc.
Inventor： Amit S. Sant , Alejandro J. Marquez , Indranil S. Sen , Mohit Narang , Shang-Te Yang
CPC classification number: H04W4/029 , G01S5/00 , G01S5/12 , G01S5/14 , H04W4/023 , H04W4/024 , H04W4/026 , H04W4/33 , H04W64/00 , H04W88/02
Abstract: Methods and devices useful in performing precise indoor localization and tracking are provided. By way of example, a method includes locating and tracking, via a first wireless electronic device, a plurality of other wireless electronic devices within an indoor environment. The method also includes performing front-back detection, performing stationary node detection, performing angle of arrival (AoA) error correction, and performing field of view (FOV) filtering. Performing indoor localization and tracking of the plurality of other wireless electronic devices includes providing an indication of a physical location of the plurality of other wireless electronic devices within the indoor environment.
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公开(公告)号：US20170373819A1
公开(公告)日：2017-12-28
申请号：US15189874
申请日：2016-06-22
Applicant: APPLE INC.
Inventor： Hsin-Yuo Liu , Peter M. Agboh , Mohit Narang , Indranil S. Sen , Nicholas M. McDonnell , Chia-Yiaw Chong
CPC classification number: H04L5/1461 , H03F3/245 , H03F3/68 , H03F2200/111 , H03F2200/451 , H03H9/02007 , H03H9/171 , H03H9/64 , H04B7/0413 , H04L5/0023 , H04L5/0028 , H04L5/0066 , H04W4/80 , H04W84/12 , H04W88/06
Abstract: Devices and systems useful in concurrently receiving and transmitting Wi-Fi signals and Bluetooth signals in the same frequency band are provided. By way of example, an electronic device includes a transceiver configured to transmit data and to receive data over channels of a first wireless network and a second wireless network concurrently. The transceiver includes a plurality of filters configured to allow the transceiver to transmit the data and to receive the data in the same frequency band by reducing interference between signals of the first wireless network and the second wireless network.
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公开(公告)号：US20170336850A1
公开(公告)日：2017-11-23
申请号：US15161776
申请日：2016-05-23
Applicant: APPLE INC.
Inventor： Diego C. Hernandez , Harneet Singh Oberoi , Indranil S. Sen , Kevin C. Camilleri , Raghuram C. Kamath , Vusthla Sunil Reddy
IPC: G06F1/32
Abstract: A technique for dynamically adjusting power use of an input/output (I/O) interface of an electronic device is provided. The electronic device includes an input/output (I/O) interface that facilitates electronic communications with a receiving electronic device, at a particular transmission rate that is dynamically changeable by the electronic device. Transmission power and transmission rate adjustment circuitry determines whether a step-down in a transmission power used for signal transmission at the particular transmission rate is desirable. When desirable, the transmission power is dynamically adjusted down one step, such that less power is used by the I/O interface during the electronic communications.
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