公开(公告)号：US20230268650A1

公开(公告)日：2023-08-24

申请号：US17678154

申请日：2022-02-23

Applicant: Cisco Technology, Inc.

Inventor： John Matthew Swartz ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Matthew Aaron Silverman ,  Ardalan Alizadeh

IPC: H01Q3/46 ,  H04W12/02 ,  H04B7/0426

CPC classification number: H01Q3/46 ,  H04W12/02 ,  H04B7/043

Abstract: A system and methods by which a reconfigurable intelligent surface device is dynamically configured to control the reflection of transmissions made between an access point and one or more client devices so as to protect the transmissions from being properly received by an unauthorized device. These methods may be used to maintain data confidentiality, particular for remote workers. The positions of the access point and client devices are used to configure the reconfigurable intelligent surface device to reflect the transmissions inward and avoid/minimize leakage outside a physical space.

公开(公告)号：US20230199432A1

公开(公告)日：2023-06-22

申请号：US17555598

申请日：2021-12-20

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Matthew Aaron Silverman ,  John Matthew Swartz ,  Ardalan Alizadeh ,  Jerome Henry

IPC: H04W4/029 ,  H04B17/318

CPC classification number: H04W4/029 ,  H04B17/318 ,  H04W84/12

Abstract: This technology allows for determining the location of client devices via radio scanning for triggered orthogonal frequency-division multiple access (“OFDMA”) uplinks. Access points (“APs”) are configured for OFDMA transmissions. A first AP transmits a trigger frame on particular channel to stations in the wireless network. Neighboring APs scan channels for trigger frames (“TF”). Upon detection of a TF, neighboring APs associate a station identifier with a frequency allocation, or resource unit, in the TF. The neighboring APs receive an OFDMA uplink from the stations, determine a received signal strength indicator (“RSSI”) value for each frequency allocation in the OFDMA uplink, and transmit the RSSI values with the associated station identifier to the first AP. The first AP determines the location of each station by mapping a distance value to the RSSI values.

公开(公告)号：US11622355B2

公开(公告)日：2023-04-04

申请号：US17301176

申请日：2021-03-29

Applicant: Cisco Technology, Inc.

Inventor： Ardalan Alizadeh ,  Gautam D. Bhanage ,  Khashayar Mirfakhraei ,  Matthew A. Silverman ,  Sivadeep R. Kalavakuru

IPC: H04W84/12 ,  H04W72/044 ,  H04W72/0453

Abstract: A method includes instructing, by a WiFi access node, a first device to communicate using an uplink frequency band with a first uplink power. The method also includes instructing, by the WiFi access node, a second device to communicate using the uplink frequency band with a second uplink power different from the first uplink power.

公开(公告)号：US20230067588A1

公开(公告)日：2023-03-02

申请号：US17983502

申请日：2022-11-09

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Ardalan Alizadeh ,  Pooya Monajemi ,  Jerome Henry

IPC: H04W72/04

Abstract: In one embodiment, a method comprises first causing, by a controller device, wireless access points (APs) to allocate first non-interfering wireless channels for a prescribed reliable data service for wireless client devices in a WLAN; second causing the wireless APs to allocate a second shared channel having a bandwidth that is greater than the corresponding bandwidth of any of the first non-interfering wireless channels; allocating for each wireless client device a corresponding location service interval on the second shared channel for transmission of at least a corresponding identifiable wireless data unit for locating the corresponding wireless client device between two or more of the wireless APs; and determining a location of at least one of the wireless client devices based on reception of at least the corresponding wireless data unit between the one wireless client device and the two or more wireless APs during the corresponding location service interval.

公开(公告)号：US11589253B2

公开(公告)日：2023-02-21

申请号：US17484162

申请日：2021-09-24

Applicant: Cisco Technology, Inc.

Inventor： Khashayar Mirfakhraei ,  Xu Zhang ,  Ardalan Alizadeh ,  Amir Hosein Kamalizad

IPC: H04W24/10 ,  H04W72/12 ,  H04W24/08 ,  H04W72/04 ,  H04W72/1263 ,  H04W72/0446 ,  H04W72/0453

Abstract: In one embodiment, an apparatus comprises a compressive sensing schedule generator configured to generate a plurality of compressive sensing schedules, wherein each of the plurality of compressive sensing schedules is for each of a plurality of frequency bands of a network, wherein the network comprises a plurality of access points and a plurality of clients, and a sensing matrix combiner configured to combine the plurality of compressive sensing schedules into a resulting schedule that comprises a spatial distribution and a scheduled time slot for each of the plurality of access points.

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：US11540135B2

公开(公告)日：2022-12-27

申请号：US16869370

申请日：2020-05-07

Applicant: Cisco Technology, Inc.

Inventor： Gautam D. Bhanage ,  Benjamin J. Cizdziel ,  Vishal S. Desai ,  Ardalan Alizadeh ,  Khashayar Mirfakhraei

IPC: H04W12/122 ,  H04W12/63 ,  H04W12/08

Abstract: Aspects described herein include a method for use with an access point (AP). The method comprises inspecting control frames received from a rogue AP, characterizing an intrusion by the rogue AP using one or more spatial reuse parameters included in the control frames, and selecting a defensive posture for the AP based on the characterization.

公开(公告)号：US11410046B2

公开(公告)日：2022-08-09

申请号：US17474191

申请日：2021-09-14

Applicant: Cisco Technology, Inc.

Inventor： Dantong Liu ,  Qing Zhao ,  Khashayar Mirfakhraei ,  Gautam Dilip Bhanage ,  Xu Zhang ,  Ardalan Alizadeh

IPC: H04L67/10 ,  G06N3/08 ,  G06N3/04 ,  H04L41/0893 ,  H04L41/50 ,  H04L67/148

Abstract: Learning-based service migration in mobile edge computing may be provided. First, a service migration policy may be created for a network that includes a plurality of edge clouds configured to provide a service to users. Next, a movement of a user receiving the service from a source edge cloud may be detected. The source edge cloud may be associated with a first area and the detected movement may be from the first area to a second area. Then, the service migration policy may be applied to determine whether to migrate the service for the user from the source edge cloud. In response to determining to migrate the service, a target edge cloud may be identified and the service for the user may be migrated from the source edge cloud to the target edge cloud. The service migration policy may then be updated based on a success of the migration.

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：US11275366B2

公开(公告)日：2022-03-15

申请号：US16405064

申请日：2019-05-07

Applicant: Cisco Technology, Inc.

Inventor： Khashayar Mirfakhraei ,  Amir Hosein Kamalizad ,  Ardalan Alizadeh ,  Xu Zhang

IPC: G05B23/02 ,  G01D5/00

Abstract: In one embodiment, a management entity monitors for a change in a convergence rate of spatio-temporal compressive sensing measurements from a plurality of sensors in a sensor network operating according to a measurement matrix up to a halting criterion, and if the change is below a given threshold, determines whether the change is due to impulse noise or due to continued sensed measurements. If continued sensed measurements, the management entity initiates a single-dimensional compressive sensing in a spatial domain at regular time intervals, and identifies and tracks gradient clusters. In response to a change in joint spatio-temporal sparsity of tracked nodes of the gradient clusters, the management entity can then determine an updated measurement matrix based on the joint spatio-temporal sparsity of tracked nodes while satisfying one or more operating parameters, and directs at least certain sensors of the plurality of sensors to operate according to the updated measurement matrix.