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1.发明申请公开(公告)号：US20220337284A1
公开(公告)日：2022-10-20
申请号：US17853660
申请日：2022-06-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Kaichien Tsai , Arvind Kandhalu Raghu , Ramanuja Vedantham
IPC: H04B1/713 , H04B17/318 , H04W4/80 , H04L43/0823 , H04L1/20 , H04B17/26 , H04L1/00 , H04L43/16
Abstract: A method for pseudo channel hopping in a node of a wireless mesh network is provided that includes scanning each channel of a plurality of channels used for packet transmission by the node, wherein each channel is scanned for a scan dwell time associated with the channel, updating statistics for each channel based on packets received by the node during the scanning of the channel, and changing scan dwell times of the plurality of channels periodically based on the statistics.
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公开(公告)号：US10951261B2
公开(公告)日：2021-03-16
申请号：US15424677
申请日：2017-02-03
Applicant: Texas Instruments Incorporated
Inventor： Kaichien Tsai , Arvind Kandhalu Raghu , Ramanuja Vedantham
IPC: H04B1/713 , H04B17/318 , H04W4/80 , H04L12/26 , H04L1/20 , H04B17/26 , H04L1/00 , H04W40/22 , H04B1/715 , H04L12/933 , H04W84/18
Abstract: A method for pseudo channel hopping in a node of a wireless mesh network is provided that includes scanning each channel of a plurality of channels used for packet transmission by the node, wherein each channel is scanned for a scan dwell time associated with the channel, updating statistics for each channel based on packets received by the node during the scanning of the channel, and selecting a channel of the plurality of channels for scanning based on the statistics when the scan dwell time of a currently scanned channel ends.
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公开(公告)号：US10560909B2
公开(公告)日：2020-02-11
申请号：US15703700
申请日：2017-09-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ariton E. Xhafa , Jianwei Zhou , Il Han Kim , Kaichien Tsai , Xiaolin Lu
Abstract: A network includes a plurality of parent nodes to communicate in a wireless network via a wireless network protocol. A network node establishes a network connection to one of the parent nodes of the plurality of parent nodes in response to received beacons from the parent nodes. A signal analyzer in the network node processes a received signal strength of the beacons and the number of beacons received over a given time period from each of the parent nodes. The signal analyzer selects the parent node by analyzing the received signal strength for a number of beacons received from each parent node with respect to a number of expected beacons transmitted from each parent node of the plurality of parent nodes over the given time period.
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公开(公告)号：US09894512B2
公开(公告)日：2018-02-13
申请号：US15494103
申请日：2017-04-21
Applicant: Texas Instruments Incorporated
Inventor： Arvind Kandhalu Raghu , Kaichien Tsai , Ramanuja Vedantham
Abstract: A BLE-Mesh device includes a controller coupled to a memory and to a transceiver adapted to be coupled to an antenna, wherein the controller implements an applications layer including BLE and Mesh applications, and a BLE stack and a mesh stack. The BLE-Mesh device has a switchable high-speed and low-speed mode and a speed switching algorithm for implementing a method of communications in BLE-mesh network. A broadcast ping is sent to neighborhood devices with a time to live (TTL)=1. A manufacturer's ID is analyzed to identify in a manufacturer's ID field in pongs received to determine a higher-speed capable device or a lower-speed device. A higher-speed data rate is utilized for mesh communications if a percentage of higher-speed capable devices is≧a threshold percentage or a lower-speed data rate is utilized for the mesh communications if the percentage of higher-speed capable devices is
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公开(公告)号：US12038522B2
公开(公告)日：2024-07-16
申请号：US17522732
申请日：2021-11-09
Applicant: Texas Instruments Incorporated
Inventor： Borja Martinez Huerta , Guillem Boquet Pujadas , Xavier Vilajosana Guillen , Anand Ganesh Dabak , Kaichien Tsai , Jianwei Zhou , Danil Shalumov
CPC classification number: G01S5/0244 , G01S5/04 , H04W64/00
Abstract: In an example method of target position estimation, the method includes calculating initial estimated positions of a target transmitter. Each of the initial estimated positions is based on an angle of arrival estimate received from a locator. The method includes generating an error projection associated with each of the initial estimated positions. The error projection is based on azimuth and elevation error characteristics of the locator associated with the initial estimated position. The method includes creating a select group of the locators based on overlaps of the error projections, wherein the select group of locators comprises a subset of the locators. The method includes calculating a refined estimate of the position of the target transmitter based on the initial estimated positions associated with the select group of locators.
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Patent Agency Ranking
公开(公告)号：US20210044322A1
公开(公告)日：2021-02-11
申请号：US17081141
申请日：2020-10-27
Applicant: Texas Instruments Incorporated
Inventor： Kaichien Tsai , Arvind Kandhalu Raghu , Ramanuja Vedantham
IPC: H04B1/713 , H04L12/26 , H04B17/318 , H04L1/00 , H04L1/20 , H04W4/80 , H04B17/26 , H04W40/22 , H04B1/715 , H04L12/933 , H04W84/18
Abstract: A method for pseudo channel hopping in a node of a wireless mesh network is provided that includes scanning each channel of a plurality of channels used for packet transmission by the node, wherein each channel is scanned for a scan dwell time associated with the channel, updating statistics for each channel based on packets received by the node during the scanning of the channel, and selecting a channel of the plurality of channels for scanning based on the statistics when the scan dwell time of a currently scanned channel ends.
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公开(公告)号：US10447142B1
公开(公告)日：2019-10-15
申请号：US16227314
申请日：2018-12-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Vinod Joseph Menezes , Manikandan RR , Rajat Chauhan , Vipul Kumar Singhal , Mahesh Madhukar Mehendale , Kaichien Tsai
Abstract: A switch-mode power supply includes a DC-DC converter and metering circuitry that is coupled to the DC-DC converter. The metering circuitry includes scaling circuitry, a current source, a capacitor, switching circuitry, and a comparator. The scaling circuitry is configured to generate a reference current scaled to be a predetermined fraction of a peak current flowing in an inductor of the DC-DC converter. The current source is configured to output a first current that is one-half of the reference current. The capacitor is coupled to the current source. The switching circuitry is configured to switchably connect the current source to the capacitor. The comparator is coupled to the capacitor. The comparator is configured to generate a signal indicating that a voltage across the capacitor exceeds a threshold voltage.
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公开(公告)号：US10291520B2
公开(公告)日：2019-05-14
申请号：US15495441
申请日：2017-04-24
Applicant: Texas Instruments Incorporated
Inventor： Arvind Kandhalu Raghu , Kaichien Tsai , Ramanuja Vedantham
IPC: H04L12/721 , H04L12/801 , H04W28/14 , H04W40/02 , H04W8/00 , H04W88/04 , H04W74/08 , H04W84/18 , H04W4/80 , H04B7/15
Abstract: A BLE-Mesh device includes a controller, an RF driver for driving the transceiver adapted to be coupled to an antenna, and a counter. The controller implements an applications layer including BLE and Mesh Applications, and a BLE stack and a mesh stack. A redundant traffic suppression relaying algorithm is for waiting for a random time within a selected time window from W1 to a later W2 before attempting to transmit a first packet that contains a unique source (SRC) address and a packet sequence (SEQ) number of a device that is the source of the first packet. If during the random time a packet with both the source device's SRC address and the SEQ number is received, the counter is incremented from an initial count to a current count. After the random time elapses, the current count is compared to a Cthreshold value, and the first packet is transmitted only if the current count
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公开(公告)号：US09274201B2
公开(公告)日：2016-03-01
申请号：US14317730
申请日：2014-06-27
Applicant: Texas Instruments Incorporated
Inventor： Kaichien Tsai , Minghua Fu , Anand Dabak
CPC classification number: G01R35/005 , G01R35/04
Abstract: A system is provided for calibrating a device. The system includes a reference component, a sampling component, a calibration component, a comparing component and a proportional integral component. The reference component provides a reference power signal based on a voltage instruction and a current instruction. The sampling component samples a voltage signal to obtain a sampled voltage value and samples a current signal to obtain a sampled current value. The calibration component generates a calibrated power signal based on the sampled voltage value and the sampled current. The comparing component generates an error signal based on the reference power signal and the calibrated power signal. The proportional integral component and the calibration component are a feedback system that is operable to calibrate the gain of the sampled voltage and the sample current based on the error signal.
Abstract translation: 提供用于校准装置的系统。 该系统包括参考组件，采样组件，校准组件，比较组件和比例积分组件。 参考组件基于电压指令和当前指令提供参考功率信号。 采样分量采样电压信号以获得采样电压值并对电流信号进行采样以获得采样电流值。 校准组件基于采样电压值和采样电流产生校准功率信号。 比较组件基于参考功率信号和校准的功率信号产生误差信号。 比例积分分量和校准分量是可用于基于误差信号校准采样电压和采样电流的增益的反馈系统。
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公开(公告)号：US20250003853A1
公开(公告)日：2025-01-02
申请号：US18343423
申请日：2023-06-28
Applicant: Texas Instruments Incorporated
Inventor： Kaichien Tsai , Boyu Shen , Zhongyan Sheng
Abstract: Techniques are described herein for air quality sensing. In some examples, the techniques are implemented as an apparatus including first and second light sources, a light detector having a detector output, and a processing circuit having a processing input coupled to the detector output and a processing output. The first light source is configured to generate a first light signal having a first wavelength. The second light source is configured to generate a second light signal having a second wavelength different from the first wavelength. The light detector is configured to generate a first detection signal at the detector output responsive to the first light signal and a second detection signal at the detector output responsive to the second light signal. The processing circuit is configured to generate a third signal representative of an air quality measurement at the processing output responsive to the first and second detection signals.
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