公开(公告)号：US11729740B2

公开(公告)日：2023-08-15

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 ,  H04L101/622 ,  H04W84/12

CPC classification number: H04W64/003 ,  H04B17/318 ,  H04W4/029 ,  H04W8/005 ,  H04W48/16 ,  H04L2101/622 ,  H04W84/12

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：US20230239012A1

公开(公告)日：2023-07-27

申请号：US17989262

申请日：2022-11-17

Applicant: Cisco Technology, Inc.

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

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

CPC classification number: H04B7/0452 ,  H04B7/0426 ,  H04B17/327 ,  H04B17/336

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：US20230126483A1

公开(公告)日：2023-04-27

申请号：US17512098

申请日：2021-10-27

Applicant: Cisco Technology, Inc.

Inventor： Fred J. Anderson ,  Paul Jeffrey Stager ,  Evgeny Yankevich ,  Matthew Aaron Silverman

IPC: H04W72/08 ,  H04W72/04 ,  G01S7/02

Abstract: Methods and systems for distinguishing between radar signals and Wi-Fi signals are provided. When a set of electromagnetic signals are received, various tests are performed on the signals to determine if the signals are associated with radar pulses or if the signals are more likely to be associated with stray WI-Fi signals or other non-radar interference. One such test relies on the relatively small variance of frequencies used by radar pulses when compared to the high variation of Wi-Fi signals. Another test relies on the relatively low peak to average power ratio of signals associated with radar pulses when compared to Wi-Fi signals. The tests described herein are an improvement on existing methods for distinguishing radar signals from Wi-Fi signals and result in less switching of Wi-Fi channels due to erroneously detected radar signals.

公开(公告)号：US11533698B2

公开(公告)日：2022-12-20

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：US11457330B2

公开(公告)日：2022-09-27

申请号：US17125144

申请日：2020-12-17

Applicant: Cisco Technology, Inc.

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

IPC: H04W4/02 ,  H04W74/08 ,  H04B1/7163

Abstract: Presented herein are techniques for assigning Ultra-Wideband (UWB) anchors for client ranging. A control device can monitor UWB ranging between a mobile device and a primary anchor. In response to determining that a signal strength between the mobile device and the primary anchor is below a threshold, the control device can identify anchors for which the mobile device has had a signal strength above the threshold during a period of time, and select one of the anchors as a new primary anchor for the mobile device. For example, the control device can select the new primary anchor based on a relative collision tolerance mapping for the new primary anchor and at least one other anchor within a UWB range of the new primary anchor. The control device can send a command causing UWB ranging to be performed between the mobile device and the new primary anchor.

公开(公告)号：US11445467B2

公开(公告)日：2022-09-13

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 ,  H04W8/00 ,  H04B17/318 ,  H04W48/16 ,  H04L101/622 ,  H04W84/12

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：US20220225217A1

公开(公告)日：2022-07-14

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: 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：US20220070612A1

公开(公告)日：2022-03-03

申请号：US17125144

申请日：2020-12-17

Applicant: Cisco Technology, Inc.

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

IPC: H04W4/02 ,  H04B1/7163 ,  H04W74/08

Abstract: Presented herein are techniques for assigning Ultra-Wideband (UWB) anchors for client ranging. A control device can monitor UWB ranging between a mobile device and a primary anchor. In response to determining that a signal strength between the mobile device and the primary anchor is below a threshold, the control device can identify anchors for which the mobile device has had a signal strength above the threshold during a period of time, and select one of the anchors as a new primary anchor for the mobile device. For example, the control device can select the new primary anchor based on a relative collision tolerance mapping for the new primary anchor and at least one other anchor within a UWB range of the new primary anchor. The control device can send a command causing UWB ranging to be performed between the mobile device and the new primary anchor.

公开(公告)号：US11184265B2

公开(公告)日：2021-11-23

申请号：US16655065

申请日：2019-10-16

Applicant: Cisco Technology, Inc.

Inventor： Ardalan Alizadeh ,  Gautam Dilip Bhanage ,  Benjamin Jacob Cizdziel ,  Khashayar Mirfakhraei ,  Matthew Aaron Silverman

IPC: H04L12/26 ,  H04W72/08 ,  H04W52/24 ,  H04L29/14 ,  H04W84/12

Abstract: Inter-protocol interference reduction for hidden nodes may be provided. A first service end point may determine that an inter-protocol interference is present on a channel. Next, an initial packet failure count value on the channel may be determined. A transmit (Tx) power for selected packets may then be increased until a subsequent packet failure count value on the channel is less than the initial packet failure count value.

公开(公告)号：US11153760B2

公开(公告)日：2021-10-19

申请号：US16293218

申请日：2019-03-05

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Daniel Joseph Lyons ,  Pooya Monajemi ,  John Matthew Swartz

IPC: H04W16/10 ,  H04W74/08 ,  H04L1/00 ,  H04W72/04 ,  H04B17/336 ,  H04W72/08 ,  H04W80/08 ,  H04W72/12 ,  H04W16/14 ,  H04B7/0452 ,  H04W84/12

Abstract: In one illustrative example, a device configured for use in a wireless local area network (WLAN) may cause a spatial reuse (SR) adjustment to be performed based on data received from a multi-user receiver procedure for the blind detection and demodulation of colliding packets from multiple stations. This procedure may be performed by one or more access points (APs) and/or distributed sensor nodes, each having such a multi-user receiver. The procedure may involve receiving and decoding, over a channel, a first spatial stream from a first device of a first base service set (BSS) color; simultaneously receiving and decoding, over the channel, a second spatial stream from a second device of a second BSS color (i.e. an overlapping BSS or “OBSS”); and calculating a signal-to-interference ratio (SIR) based on signal levels associated with the streams. The SR adjustment may involve adjusting an OBSS Packet Detect (PD) (OBSS-PD) threshold.