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公开(公告)号：US09658315B2
公开(公告)日：2017-05-23
申请号：US14076531
申请日：2013-11-11
Applicant: Cisco Technology, Inc.
Inventor： Santosh Pandey , Brian Donald Hart , Ilya Khasin
CPC classification number: G01S5/04 , G01S5/021 , G01S5/0252 , G01S5/14 , H04W52/146 , H04W52/245 , H04W52/283
Abstract: In an example embodiment, there is disclosed herein, an apparatus comprising an interface and location determination logic coupled with the interface. The location determination logic receives data representative of measured signal strengths for a wireless device from a plurality of receiving devices at known locations via the interface. The location determination logic determines an estimated location based on the measured signal strengths and a first transmit power for the wireless device. The location determination logic determines a revised transmit power for the wireless device based on the measured signal strengths from the plurality of devices at known locations and the estimated location. The location determination logic determines a revised estimated location based on the measured signal strengths and the revised transmit power for the wireless device.
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公开(公告)号：US08781040B2
公开(公告)日：2014-07-15
申请号：US13781822
申请日：2013-03-01
Applicant: Cisco Technology, Inc.
Inventor： Raghuram Rangarajan , Brian Donald Hart , Paul J. Stager
IPC: H04L29/06
CPC classification number: H04L69/22 , H04L1/08 , H04L7/08 , H04L27/2607 , H04L27/2647 , H04L27/2656 , H04L27/2671 , H04L27/2679
Abstract: A mid-packet detection technique is provided that detects a packet with periodic repetitions of a fixed duration at a point in time of the packet other than a start-of-packet pattern, e.g., a preamble, associated with the packet. The process performs packet detection without detecting a preamble and does not require carrier frequency recovery, timing recovery (synchronization) or channel estimation. In one embodiment, a doubly differential matched filter autocorrelation of the received signal is computed and used as a metric for packet detection when the preamble is not observed or to complement preamble detection. The metric is compared to a threshold to indicate detection of a packet.
Abstract translation: 提供了一种中间包检测技术，其检测分组的周期性重复，该分组在分组的时间点不同于与分组相关联的分组开始模式（例如，前导码）。 该过程执行分组检测而不检测前导码，并且不需要载波频率恢复，定时恢复（同步）或信道估计。 在一个实施例中，计算接收信号的双差分匹配滤波器自相关，并将其用作当没有观察到前同步码时的分组检测的度量或用于对前导码检测进行补码。 将度量与阈值进行比较以指示分组的检测。
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23.发明公开公开(公告)号：US20240298372A1
公开(公告)日：2024-09-05
申请号：US18593646
申请日：2024-03-01
Applicant: Cisco Technology, Inc.
Inventor： Brian Donald Hart , Malcolm Muir Smith
Abstract: Method, system, and/or computer readable medium for providing enhanced diversity and reliability for a continued wireless connection including: establishing an upper upper medium access controller (UMAC) and a plurality of lower UMACs; discovering the upper UMAC by each of the plurality of lower UMACs; connecting a station (STA) actor to each of the plurality of lower UMACs; connecting each of the plurality of lower UMACs to the upper UMAC; and establishing a connection through the upper UMAC and each of the plurality of lower UMACs to the STA actor.
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公开(公告)号：US11817949B2
公开(公告)日：2023-11-14
申请号：US17654534
申请日：2022-03-11
Applicant: Cisco Technology, Inc.
Inventor： Benjamin Jacob Cizdziel , Brian Donald Hart , Pooya Monajemi , Vishal Satyendra Desai
IPC: H04W72/04 , H04L1/00 , H04L47/125 , H04W16/14 , H04L47/2441 , G01S7/02
CPC classification number: H04L1/0013 , H04L47/125 , H04L47/2441 , H04W16/14 , G01S7/021
Abstract: An access point in a wireless network communicates wirelessly with one or more client devices over a channel that includes a plurality of subchannels. Radar is detected on a first subchannel of the plurality of subchannels. It is determined to puncture the first subchannel, based on the detecting the radar on the first subchannel and based on one or more puncturing factors. The first subchannel is punctured, the puncturing comprising muting one or more subcarriers on the first subchannel.
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公开(公告)号：US11513181B2
公开(公告)日：2022-11-29
申请号：US16939614
申请日：2020-07-27
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Brian Donald Hart , Paul J. Stager , Santosh Pandey , David Kloper , Dan Lyons , Matthew A. Silverman
Abstract: In one embodiment, a method includes receiving a plurality of radio frequency chains at a wireless device in a block based modulation environment, recording subcarrier phases and differences between the subcarrier phases, and using the subcarrier phase differences to construct a feature vector for use in angle of arrival calculated positioning of a mobile device.
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Patent Agency Ranking
公开(公告)号：US11303385B2
公开(公告)日：2022-04-12
申请号：US16748582
申请日：2020-01-21
Applicant: Cisco Technology, Inc.
Inventor： Benjamin Jacob Cizdziel , Brian Donald Hart , Pooya Monajemi , Vishal Satyendra Desai
IPC: H04L1/00 , H04L47/125 , H04W16/14 , H04L47/2441 , G01S7/02
Abstract: An access point in a wireless network communicates wirelessly with one or more client devices over a channel that includes a plurality of subchannels. Radar is detected on a first subchannel of the plurality of subchannels. It is determined to puncture the first subchannel, based on the detecting the radar on the first subchannel and based on one or more puncturing factors. The first subchannel is punctured, the puncturing comprising muting one or more subcarriers on the first subchannel.
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公开(公告)号：US10855428B2
公开(公告)日：2020-12-01
申请号：US16204938
申请日：2018-11-29
Applicant: Cisco Technology, Inc.
Inventor： Manoj Gupta , Gautam Dilip Bhanage , Brian Donald Hart , David Stuart Kloper
Abstract: In one embodiment, a method is performed. An access point (AP) device may communicate signaling relating to a client device allocation for a location-related measurement. The AP device may transmit a trigger frame. The AP device may receive a response to the trigger frame from a client device. The response may include an uplink orthogonal frequency division multiple access (OFDMA) transmission. A location-related measurement of the client device may be determined based on the response to the trigger frame.
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公开(公告)号：US09823330B2
公开(公告)日：2017-11-21
申请号：US13886533
申请日：2013-05-03
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Brian Donald Hart , Paul J. Stager , Santosh Pandey , David Kloper , Dan Lyons , Matthew A. Silverman
CPC classification number: G01S3/38 , G01S1/68 , G01S3/48 , H04W64/006
Abstract: In one embodiment, an apparatus includes a plurality of antennas, a receiver in communication with said plurality of antennas for receiving one or more packets in a block based modulation environment, a switch interposed between a portion of the antennas and the receiver for switching between the antennas, and a processor for calculating angle of arrival for use in identifying a location of a mobile device transmitting the one or more packets.
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公开(公告)号：US20170325061A1
公开(公告)日：2017-11-09
申请号：US15662111
申请日：2017-07-27
Applicant: Cisco Technology, Inc.
Inventor： Santosh Pandey , Rong Peng , Brian Donald Hart
IPC: H04W4/02 , G01C21/26 , H04B17/318
CPC classification number: H04W4/02 , G01C21/20 , H04B17/21 , H04B17/27 , H04B17/318 , H04B17/3913
Abstract: Determining a location of a user device comprises a wireless system supported by wireless access points receiving signals from a user device. The wireless system estimates a location of the user device based on a coarse calculation based on an angle of arrival of the received signal and determines if the user device is in an area under a access point. If so, the wireless system performs a fine location calculation. The wireless system identifies received signal strength indicator values for the user device and uses the values and the calculated location of the user device to improve calibration of a received signal strength location model. If the system determines that the user is not in the area under the access point, the wireless system combines the coarse calculation location and a received signal strength determined location and estimates a location based on the combined calculations.
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公开(公告)号：US20140062789A1
公开(公告)日：2014-03-06
申请号：US14076531
申请日：2013-11-11
Applicant: Cisco Technology, Inc.
Inventor： Santosh Pandey , Brian Donald Hart , Ilya Khasin
IPC: G01S5/04
CPC classification number: G01S5/04 , G01S5/021 , G01S5/0252 , G01S5/14 , H04W52/146 , H04W52/245 , H04W52/283
Abstract: In an example embodiment, there is disclosed herein, an apparatus comprising an interface and location determination logic coupled with the interface. The location determination logic receives data representative of measured signal strengths for a wireless device from a plurality of receiving devices at known locations via the interface. The location determination logic determines an estimated location based on the measured signal strengths and a first transmit power for the wireless device. The location determination logic determines a revised transmit power for the wireless device based on the measured signal strengths from the plurality of devices at known locations and the estimated location. The location determination logic determines a revised estimated location based on the measured signal strengths and the revised transmit power for the wireless device.
Abstract translation: 在示例实施例中，这里公开了一种包括与接口耦合的接口和位置确定逻辑的装置。 位置确定逻辑经由接口从已知位置处的多个接收设备接收表示无线设备的测量信号强度的数据。 位置确定逻辑基于所测量的信号强度和无线设备的第一发射功率来确定估计位置。 位置确定逻辑基于来自已知位置处的多个设备的测量信号强度和估计位置来确定无线设备的经修改的发射功率。 位置确定逻辑基于测量的信号强度和无线设备的经修改的发射功率来确定修改的估计位置。
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