公开(公告)号：US11540212B2

公开(公告)日：2022-12-27

申请号：US17145252

申请日：2021-01-08

Applicant: Cisco Technology, Inc.

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

IPC: H04W4/00 ,  H04W48/16 ,  H04W48/20 ,  H04W72/04 ,  H04W84/12 ,  H04W88/08

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：US20220248364A1

公开(公告)日：2022-08-04

申请号：US17167979

申请日：2021-02-04

Applicant: Cisco Technology, Inc.

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

IPC: H04W64/00 ,  H04W4/029 ,  H04L29/12 ,  H04W48/16 ,  H04W8/00 ,  H04B17/318

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：US11368857B1

公开(公告)日：2022-06-21

申请号：US17145242

申请日：2021-01-08

Applicant: Cisco Technology, Inc.

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

IPC: H04W16/28 ,  H04B17/391 ,  H04W64/00 ,  H04W24/02 ,  H04W84/12

Abstract: Optimal determination of wireless antenna configurations may be provided. A computing device may direct an antenna array of an Access Point (AP) to generate a wide beamwidth, to locate a cluster of two or more stations. Upon locating the cluster, the AP can narrow the beamwidth, and, with the narrower beamwidth, receive a key performance indicator (KPI) from at least one of the two or more stations in the cluster. The computing device may then generate a statistical model, based on the KPI and an antenna vector of the antenna array. Based on the statistical model, the computing device can determine a second antenna vector to optimize the KPI for one or more of the client stations. The computing device can then modify the antenna state of the AP to generate the determined antenna vector.

公开(公告)号：US20220070613A1

公开(公告)日：2022-03-03

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 ,  H04B1/7163 ,  H04W72/10

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：US11137475B2

公开(公告)日：2021-10-05

申请号：US16151466

申请日：2018-10-04

Applicant: Cisco Technology, Inc.

Inventor： Evgeny Yankevich ,  Matthew Aaron Silverman

IPC: G01S7/02 ,  H04W72/04 ,  H04L25/03

Abstract: A pseudo low intermediate frequency (IF) configuration is provided for a receiver having a zero IF radio architecture dedicated for radar detection, in order to reduce false radar detection. Energy from local oscillator leakage is shifted away from DC. After filtering out of the desired sub-channel, the local oscillator leakage energy is suppressed, reducing false radar detection.

公开(公告)号：US20200329452A1

公开(公告)日：2020-10-15

申请号：US16380705

申请日：2019-04-10

Applicant: Cisco Technology, Inc.

Inventor： Xu Zhang ,  Paul J. Stager ,  Santosh Ghanshyam Pandey ,  Matthew Aaron Silverman ,  Abhishek Mukherji

IPC: H04W64/00 ,  H04W8/02 ,  H04B17/327 ,  H04B17/382 ,  H04W4/02 ,  H04W4/33

Abstract: Offloading of location computation from a location server to an access point through the use of projections on base phase vectors may be provided. First, an Access Point (AP) may receive a set of two or more base phase vectors from a location server. Next, the AP may measure a measured phase vector for a first signal from a user device. Then, the AP can determine projection values based on a comparison of the measured phase vector to each base phase vector. From these comparisons, the AP can determine a subset of base phase vectors with the highest projection values. The AP can then send the projection values and the subset of base phase vectors to the location server, wherein the location server determines the device location from these projection values and subset of base phase vectors.

公开(公告)号：US20200326405A1

公开(公告)日：2020-10-15

申请号：US16380668

申请日：2019-04-10

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Santosh Ghanshyam Pandey ,  Paul J. Stager ,  Xu Zhang ,  Abhishek Mukherji

IPC: G01S5/04 ,  G01S5/02

Abstract: Determining a device's location in a space in real time is computing intensive. To offload some of the workload in conducting this hyperlocation, the access points in the network conduct some of process in determining the location of a device. The cloud determines a restricted AoA search area based on previous client locations. After this determination, a three-dimensional (3D) AoA search is conducted by each AP in the restricted area (restricted by a range of azimuth directions) for a device. Finally, each AP reports a location(s) for the device, which comprises weights for selected angular sectors. The cloud can then construct a probability heat map for location computation from the weights provided from each AP for the device.

公开(公告)号：US20200245148A1

公开(公告)日：2020-07-30

申请号：US16259019

申请日：2019-01-28

Applicant: Cisco Technology, Inc.

Inventor： Santosh Ramrao Patil ,  Matthew Aaron Silverman ,  Huaiyi Wang ,  Gangadharan Byju Pularikkal ,  Akram Ismail Sheriff

IPC: H04W12/08 ,  H04W4/80 ,  H04L12/46 ,  H04W74/08

Abstract: Techniques for identification and isolation of Internet-of-Things devices in an enterprise network are described. In one embodiment, a method includes detecting a plurality of devices having a first network interface to connect to a wireless wide area network and a second network interface to connect to an enterprise network. The method also includes identifying a first subset of the plurality of devices as Internet-of-Things (IoT) devices based on at least a detected repetition rate on a physical random access channel of a transmission made by a device of the plurality of devices. The method includes assigning the IoT devices to a separate network segment within the enterprise network.

公开(公告)号：US10659116B1

公开(公告)日：2020-05-19

申请号：US16559353

申请日：2019-09-03

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Guatam Bhanage ,  Pooya Monajemi

IPC: H04B7/04 ,  H04B7/0452 ,  H04W74/08 ,  H04B7/0404 ,  H04L5/00

Abstract: In one embodiment, a method includes identifying a plurality of wireless devices associated with the wireless network apparatus, identifying a subset of the plurality of wireless devices based on whether the wireless devices in the subset have a probability above a threshold to yield to each other via a clear channel assessment (CCA) and whether the wireless network apparatus can decode uplink signals simultaneously transmitted by the wireless devices in the subset over a common uplink resource, assigning the subset to an uplink resource, separating each wireless device in the subset to each of a plurality of groups, and transmitting, for each group, a steered downlink message indicating the assigned uplink resource for each wireless device in the group, wherein the wireless devices in each group are assigned to different uplink resources.

公开(公告)号：US10595165B2

公开(公告)日：2020-03-17

申请号：US16045425

申请日：2018-07-25

Applicant: Cisco Technology, Inc.

Inventor： Xu Zhang ,  John Martin Blosco ,  Xiangxiang Fang ,  Danielle Bane ,  Matthew Aaron Silverman

IPC: H04W24/00 ,  H04W4/029 ,  H04W4/80 ,  H04W88/08 ,  H04M1/725 ,  H04W88/02

Abstract: In one embodiment, a method is performed. A device may receive an antenna state configuration and a sequence from a wireless access point (AP) device. A plurality of antenna states configured on the device may be selected based on the antenna state configuration and the sequence. An inertial measurement unit (IMU) measurement may be determined. A beacon signal may be transmitted for each selected antenna state. Each transmitted beacon signal may indicate a corresponding selected antenna state.