公开(公告)号：US11644525B2

公开(公告)日：2023-05-09

申请号：US17089119

申请日：2020-11-04

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Jerome Henry ,  Robert Edgar Barton ,  Sivadeep R. Kalavakuru

IPC: G01S5/02 ,  H04B17/318 ,  H04W4/80 ,  G01S5/00

CPC classification number: G01S5/0249 ,  G01S5/0036 ,  G01S5/0244 ,  H04B17/318 ,  H04W4/80

Abstract: A location server collects from access points at known locations in a venue, which is represented by grid locations defined by parameters accessible to the location server, (i) ultra wideband (UWB) location measurements for a UWB location technology based on UWB transmissions from mobile devices in the venue, and (ii) non-UWB location measurements for non-UWB location technologies based on non-UWB transmissions from the mobile devices. The location server associates the non-UWB location measurements for the non-UWB location technologies with the grid locations, using the UWB location measurements as reference measurements. The location server populates location calibration records for the grid locations of the venue with the non-UWB location measurements associated with the grid locations. The location server calibrates the non-UWB location technologies at the grid locations based on the non-UWB location measurements in the location calibration records associated with the grid locations.

公开(公告)号：US20230084649A1

公开(公告)日：2023-03-16

申请号：US18057902

申请日：2022-11-22

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Ardalan Alizadeh ,  Khashayar Mirfakhraei ,  Gautam D. Bhanage

IPC: H04W48/16 ,  H04W48/20 ,  H04W72/04

Abstract: Optimal determination of a Wireless Local Area Network (WLAN) sounding method and system may be provided. An Access Point (AP) selects a subchannel for the partial sounding. The AP then sounds the selected subchannel. A client station responds with Channel State Information (CSI). The AP can receive the CSI, from the client station, in response to the sounding. Based on the CSI from the selected subchannel, the AP extrapolates the CSI to determine predicted CSI for a wider bandwidth channel.

公开(公告)号：US11575413B1

公开(公告)日：2023-02-07

申请号：US17582689

申请日：2022-01-24

Applicant: Cisco Technology, Inc.

Inventor： John Matthew Swartz ,  Nagendra Kumar Nainar ,  Matthew Aaron Silverman

IPC: H04B7/0452 ,  H04B7/0426 ,  H04B17/336 ,  H04B17/327

Abstract: Presented herein are techniques to shield transmissions from being received and the information contained in them recovered by unwanted devices. Multi-user multiple-input multiple-output (MU-MIMO) techniques are employed, and in particular the spatial dimension aspects of those techniques. Shield nodes are controlled to transmit in a way to obscure the downlink streams transmitted by a wireless access point that are intended for a particular client device to anything outside of the shielded area, and also to obscure uplink streams from one or more client devices to the wireless access point to anything outside of the shielded area but allowing the uplink streams to be well received by the wireless access point.

公开(公告)号：US11564057B2

公开(公告)日：2023-01-24

申请号：US17146838

申请日：2021-01-12

Applicant: Cisco Technology, Inc.

Inventor： Robert Edgar Barton ,  Jerome Henry ,  Matthew Aaron Silverman

IPC: H04W4/02 ,  H04W72/10 ,  H04B1/7163

Abstract: Presented herein are techniques for scheduling Ultra-Wideband (UWB) anchors and mobile devices for client ranging. A control device can determine respective ranging priorities for a plurality of mobile devices, which are each assigned to at least one UWB anchor. The control device can obtain at least one collision mapping identifying, for a respective pair of the mobile devices, a collision probability that a UWB signal associated with a ranging procedure involving a first mobile device of the respective pair will collide with a UWB signal associated with a ranging procedure involving a second mobile device of the respective pair. The control device can establish a ranging schedule for the mobile devices and UWB anchors based on the respective UWB ranging priorities and the collision mapping(s). The control device can send at least one command to cause UWB ranging procedures to be performed according to the ranging schedule.

公开(公告)号：US20220369274A1

公开(公告)日：2022-11-17

申请号：US17815284

申请日：2022-07-27

Applicant: Cisco Technology, Inc.

Inventor： Paul J. Stager ,  Matthew Aaron Silverman ,  Mukul Chandail ,  Manoj Gupta ,  Swapnil Devendrakumar Shah ,  Vishal Satyendra Desai

IPC: H04W64/00 ,  H04B17/318 ,  H04W4/029 ,  H04W8/00 ,  H04W48/16

Abstract: A method and system for providing location services at a network edge is described. An AP can receive location information associated with a second AP in a location group. The AP can also receive client location data from the second AP and associated with a first client. From at least the received client location data, the AP can determine a location of the first client. The AP can then send the location of the first client to a location service.

公开(公告)号：US20220191814A1

公开(公告)日：2022-06-16

申请号：US17124020

申请日：2020-12-16

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Jerome Henry ,  Robert Edgar Barton

IPC: H04W64/00 ,  H04B1/69

Abstract: A computer-implemented method includes first collecting, from wireless devices at known locations in a venue, first ultra wideband (UWB) location measurements obtained using a first location technique based on first UWB transmissions made by a mobile device at a first rate. The method also includes second collecting, from the wireless devices, second UWB location measurements obtained using a second location technique based on second UWB transmissions made by the mobile device at a second rate. The method further includes detecting that the mobile device is in a first UWB coverage hole for the venue with respect to the first UWB location measurements based on a first UWB coverage hole criterion. The method also includes, based on detecting, increasing the second rate relative to the first rate to obtain additional second UWB location measurements using the second location technique to compensate for the first UWB coverage hole.

公开(公告)号：US20220137176A1

公开(公告)日：2022-05-05

申请号：US17089119

申请日：2020-11-04

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Jerome Henry ,  Robert Edgar Barton ,  Sivadeep R. Kalavakuru

IPC: G01S5/02 ,  G01S5/00 ,  H04W4/80 ,  H04B17/318

Abstract: A location server collects from access points at known locations in a venue, which is represented by grid locations defined by parameters accessible to the location server, (i) ultra wideband (UWB) location measurements for a UWB location technology based on UWB transmissions from mobile devices in the venue, and (ii) non-UWB location measurements for non-UWB location technologies based on non-UWB transmissions from the mobile devices. The location server associates the non-UWB location measurements for the non-UWB location technologies with the grid locations, using the UWB location measurements as reference measurements. The location server populates location calibration records for the grid locations of the venue with the non-UWB location measurements associated with the grid locations. The location server calibrates the non-UWB location technologies at the grid locations based on the non-UWB location measurements in the location calibration records associated with the grid locations.

公开(公告)号：US11265857B1

公开(公告)日：2022-03-01

申请号：US17145226

申请日：2021-01-08

Applicant: Cisco Technology, Inc.

Inventor： Ardalan Alizadeh ,  Sivadeep Reddy Kalavakuru ,  Gautam D. Bhanage ,  John Matthew Swartz ,  Matthew Aaron Silverman

IPC: H04W72/04 ,  H04B7/06 ,  H04L43/0829 ,  H04B17/318

Abstract: Optimal determination of wireless network pathway configurations may be provided. A computing device may establish Multi-Access Point (AP) coordination between at least a first AP and a second AP. The first AP can determine an uplink operation is scheduled. When an uplink is scheduled, the first AP can switch its antenna to a narrow beamwidth. The first AP can then receive uplink transmissions from at least a client in the coverage area of the narrow beamwidth. After the uplink transmission, the first AP can then switch the antenna to a larger beamwidth for a next Multi-AP coordination operation.

公开(公告)号：US11223962B2

公开(公告)日：2022-01-11

申请号：US16542056

申请日：2019-08-15

Applicant: Cisco Technology, Inc.

Inventor： Santosh Ghanshyam Pandey ,  Vishal Satyendra Desai ,  Jerome Henry ,  Matthew Aaron Silverman

IPC: H04L5/00 ,  H04W36/00 ,  H04W52/36 ,  H04W16/26 ,  H04W24/10 ,  H04W72/04 ,  H04W40/24 ,  H04L1/00

Abstract: Client analytics-driven dynamic channel assignment may be provided. At a client, Radio Frequency (RF) channels may be scanned to detect access points of a network. A subset of the access points belonging to a same Extended Set Service (ESS) of the network may be determined based on data collected from the access points during the scan. For each access point in the subset, a Channel Quality Index (CQI) may be measured for an RF channel assigned to the access point, and a non-preferred channel report may be generated based on the CQI. The non-preferred channel report may be transmitted from the client to a network management system for use in dynamic channel assignment.

公开(公告)号：US20210120515A1

公开(公告)日：2021-04-22

申请号：US16655030

申请日：2019-10-16

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Xu Zhang ,  Santosh Ghanshyam Pandey ,  Jerome Henry ,  Paul J. Stager

IPC: H04W64/00 ,  H04W16/28 ,  G01S13/76

Abstract: Access Point (AP) placement using Fine Time Measurement (FTM) may be provided. First, a plurality of Time-of-Flight (ToF) values between a first service end point and a second service end point may be determined. Each one of the plurality of ToF values may be derived from packets transmitted via different beamforming vector patterns at the first service end point and the second service end point. Then a minimum ToF value of the plurality of ToF values may be determined. Next, a distance between the first service end point and the second service end point may be determined based on the minimum ToF value.