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公开(公告)号：US11832197B2
公开(公告)日：2023-11-28
申请号：US17305032
申请日：2021-06-29
Applicant: Cisco Technology, Inc.
Inventor： Gautam D. Bhanage , Matthew A. Silverman , Sivadeep R. Kalavakuru , Ardalan Alizadeh
CPC classification number: H04W56/001 , H04W8/005 , H04W16/14 , H04W56/0065 , H04W72/1215
Abstract: Techniques for neighborhood management between WiFi and unlicensed spectrum radios. A wireless access point (AP), including a first radio, identifies a neighboring second radio operating using at least a portion of an unlicensed radio spectrum, based on a time that the AP receives a transmission from the second radio using a frequency within the unlicensed radio spectrum. Transmission between the first radio and the second radio is synchronized by identifying a clock offset between a first clock relating to the first radio and a second clock relating to the second radio.
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公开(公告)号：US11714154B2
公开(公告)日：2023-08-01
申请号：US16867410
申请日：2020-05-05
Applicant: Cisco Technology, Inc.
Inventor： Zhigang Gao , Matthew A. Silverman , Fred J. Anderson , Huaiyi Wang
CPC classification number: G01S3/143 , G01S3/74 , G01S5/0284
Abstract: Techniques for determining a location of a client device using recursive phase vector subspace estimation are described. One technique includes receiving a plurality of angle-of-arrival (AoA) measurements from a plurality of access points (APs). Each AoA measurement includes a plurality of entries for phase values measured from a signal received from a client device at the plurality of APs. At least one AoA measurement of the plurality of AoA measurements that includes at least one of: (i) one or more entries with missing phase values and (ii) one or more entries with erroneous phase values is identified, based on a recursive phase estimation. The plurality of AoA measurements are updated based on the identified at least one AoA measurement. The location of the client device is determined, based on the updated plurality of AoA measurements.
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63.发明授权公开(公告)号：US11283420B1
公开(公告)日：2022-03-22
申请号：US17081474
申请日：2020-10-27
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Evgeny Yankevich , John M. Swartz
Abstract: Dynamic automatic gain controller configuration in multiple input and multiple output receivers is provided by monitoring a given section of wireless spectrum for higher-priority signals using a first antenna set associated with a first Automatic Gain Controller (AGC) set while concurrently monitoring the given section of wireless spectrum for wireless packet-based traffic using a second antenna set associated with a second AGC set; in response to detecting a packet via the second antenna set: re-associating the first antenna set and the second antenna set to a third AGC set; receiving the packet via the first antenna set and the second antenna set using the third AGC set; and in response to the packet being received, re-associating the first antenna set to the first AGC set and the second antenna set to the second AGC set.
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公开(公告)号：US11133583B2
公开(公告)日：2021-09-28
申请号：US16420485
申请日：2019-05-23
Applicant: Cisco Technology, Inc.
Inventor： Stephen J. McCarthy , Matthew A. Silverman , Paul J. Stager
Abstract: An apparatus comprises an antenna array, a block of switches, a programmable logic device and a memory device. The antenna array comprises a plurality of antenna elements. The block of switches is configured to selectively connect respective ones of a subset of the plurality of antenna elements to corresponding ones of a plurality of transceivers in a host device. The programmable logic device is configured to communicate with the host device and to control the block of switches. The memory device is coupled to the programmable logic device, and is configured to store information allowing the host device to determine how to control connectivity of individual antenna elements to respective ones of the plurality of transceivers of the host device as part of transmit and/or receive operations of the host device.
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公开(公告)号：US11129125B1
公开(公告)日：2021-09-21
申请号：US16812004
申请日：2020-03-06
Applicant: Cisco Technology, Inc.
Inventor： Jerome Henry , Matthew A. Silverman , John M. Swartz , Vishal S. Desai , Robert E. Barton
Abstract: Coordinated radio fine time measurement is provided via sending, from a client device, a ranging request to a first radio; receiving a first response sent at a first time from the first radio over a first channel; receiving a second response sent at the first time from a second radio over a second channel; and calculating, based on times of flight for the first response and the second response, a location of the client device relative to the first radio and to the second radio. Coordinated radio fine time measurement is also proved via in response to receiving, at an Access Point (AP), a ranging request from a client device and determining to respond using multiple channels: sending, both at a first time, a first response from a first radio over a first channel a second response from a second radio over a different channel.
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Patent Agency Ranking
公开(公告)号：US20190280380A1
公开(公告)日：2019-09-12
申请号：US16420485
申请日：2019-05-23
Applicant: Cisco Technology, Inc.
Inventor： Stephen J. McCarthy , Matthew A. Silverman , Paul J. Stager
IPC: H01Q3/24
Abstract: An apparatus comprises an antenna array, a block of switches, a programmable logic device and a memory device. The antenna array comprises a plurality of antenna elements. The block of switches is configured to selectively connect respective ones of a subset of the plurality of antenna elements to corresponding ones of a plurality of transceivers in a host device. The programmable logic device is configured to communicate with the host device and to control the block of switches. The memory device is coupled to the programmable logic device, and is configured to store information allowing the host device to determine how to control connectivity of individual antenna elements to respective ones of the plurality of transceivers of the host device as part of transmit and/or receive operations of the host device.
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公开(公告)号：US10367550B2
公开(公告)日：2019-07-30
申请号：US15477620
申请日：2017-04-03
Applicant: Cisco Technology, Inc.
Inventor： David S. Kloper , Mithat C. Dogan , Matthew A. Silverman , Brian D. Hart , Jiunming Huang
IPC: H04B7/0426 , H04B7/0452
Abstract: The present disclosure discloses that a device uses precoding to transmit independent data streams to existing users and additional independent data streams to one or more new users simultaneously. During a first transmission of a first one or more data streams that are precoded using a first precoding matrix, the device determines to transmit a second one or more data streams in a second transmission. Before the first transmission is complete, the device calculates a combined precoding matrix for precoding the first one or more data streams and the second one or more data streams. The device transmits the first one or more data streams in the first transmission and the second one or more data streams in the second transmission simultaneously using the combined precoding matrix.
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公开(公告)号：US10362489B1
公开(公告)日：2019-07-23
申请号：US15953004
申请日：2018-04-13
Applicant: Cisco Technology, Inc.
Inventor： Vishal S. Desai , Amir H. Kamalizad , Matthew A. Silverman
Abstract: Techniques for channelization of a wireless communication network in the presence of interference are described. In one embodiment, a method includes detecting an unlicensed wireless wide area network signal. The method includes selecting a wireless channel for a wireless local area network that includes frequencies associated with the unlicensed signal. The method includes allocating a first portion of the wireless channel that includes frequencies associated with the unlicensed signal to a first plurality of resource units and allocating a second portion of the wireless channel that excludes frequencies associated with the unlicensed signal to a second plurality of resource units. The method includes assigning the first plurality of resource units to a first group of client devices, and assigning the second plurality of resource units to a second group of client devices.
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公开(公告)号：US10326538B2
公开(公告)日：2019-06-18
申请号：US15480197
申请日：2017-04-05
Applicant: Cisco Technology, Inc.
Inventor： Mithat C. Dogan , Jiunming Huang , Brian D. Hart , Matthew A. Silverman
IPC: H04B7/06 , H04B17/12 , H04B17/14 , H04B17/21 , H01Q3/26 , H04B7/024 , H04B7/0417 , H04L25/02 , H04L5/14
Abstract: Embodiments herein describe calibrating a plurality of radio heads having a plurality of wireless antennas. In one embodiment, the plurality of radio heads communicate a calibration signal in a round robin fashion such that each of the radio heads communicates a respective calibration signal to the remaining radio heads. The received calibration signals are then used to calibrate the radio heads. In one embodiment, a controller coupled with the plurality of radio heads calibrates the radio heads. The calibrated radio heads then communicate to one or more client devices.
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公开(公告)号：US10278155B1
公开(公告)日：2019-04-30
申请号：US15875043
申请日：2018-01-19
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Zhigang Gao , John Matthew Swartz , Paul J. Stager
Abstract: A plurality of first wireless devices monitor a ranging exchange of transmissions between a target wireless device and a second wireless device in order to record for each of the plurality of first wireless devices a time of reception of a first transmission that is sent from the second wireless device to the target wireless device and a time of reception of a second transmission that is sent from the target wireless device to the second wireless device. Using a timing error computed from the estimated location, a modification is made of the time of transmission of the first transmission to produce a first modified timestamp and of the time of reception of the second transmission to produce a second modified timestamp. A ranging measurement is computed of the target wireless device relative to the second wireless device using the first modified timestamp and the second modified timestamp.
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