公开(公告)号：US10904831B2

公开(公告)日：2021-01-26

申请号：US16406184

申请日：2019-05-08

Applicant: Cisco Technology, Inc.

Inventor： Ardalan Alizadeh ,  Amir Hosein Kamalizad ,  Khashayar Mirfakhraei ,  Xu Zhang ,  Matthew A. Silverman

IPC: H04L5/00 ,  H04W52/02 ,  H04L25/02

Abstract: In one embodiment, a device in a network receives, at its wireless receiver, a preamble of a spatially modulated packet. The device analyzes the preamble of the packet to identify a transmit antenna index of the packet. The device determines that the packet was not destined for the device, based on the transmit antenna index of the packet. The device depowers, prior to decoding the complete packet, the wireless receiver of the device, based on the determination that the packet was not destined for the device.

公开(公告)号：US10693512B1

公开(公告)日：2020-06-23

申请号：US16457588

申请日：2019-06-28

Applicant: Cisco Technology, Inc.

Inventor： Khashayar Mirfakhraei ,  Ardalan Alizadeh ,  Xu Zhang ,  Gautam D. Bhanage ,  Daniel J. Lyons ,  Brian D. Hart

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08 ,  H04B1/12 ,  H04B1/04 ,  H04B1/18

Abstract: The present disclosure provides for distortion cancelled by receiving a collided signal comprising first and second signals carrying respective first and second packets; digitizing the collided signal into a first digital signal and decoding the first packet therefrom; calculating a digital linear interference component of the first packet on the second from an estimated signal re-encoding the decoded first packet; synthesizing an analog linear interference component from the digital linear interference component; determining a digital nonlinear interference component of the first packet on the second from the first digital signal; amplifying the collided signal to produce a second amplified signal; removing the analog linear interference component from the second amplified signal to produce a partially de-interfered signal; removing the digital nonlinear interference component from the partially de-interfered signal to produce a de-interfered signal; and decoding the second packet from the de-interfered signal.

公开(公告)号：US20200158810A1

公开(公告)日：2020-05-21

申请号：US16356662

申请日：2019-03-18

Applicant: Cisco Technology, Inc.

Inventor： Xu Zhang ,  Abhishek Mukherji ,  Huy Phuong Tran ,  Vinay S. Raghuram ,  Matthew Aaron Silverman

IPC: G01S5/02 ,  H04W24/04 ,  H04W64/00 ,  G01S5/06

Abstract: Systems and methods provide for improving the accuracy of a location system. The location system can capture partial phase vector data from one or more access points (APs). The location system can capture associated data associated with the partial phase vector data across multiple dimensions, such as identity data of the APs and client devices generating the partial phase vector data and frequency band data, location data, a time and date, and other data associated with the partial phase vector data. The location system can determine correlation data across the multiple dimensions using the first partial phase vector data and the associated data. The location system can a cause of the partial phase vector data based on the correlation data. The location system can perform one or more remediation actions based on the cause of the partial phase vector data.

公开(公告)号：US20230254721A1

公开(公告)日：2023-08-10

申请号：US18156012

申请日：2023-01-18

Applicant: Cisco Technology, Inc.

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

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

CPC classification number: H04W24/10 ,  H04W72/1263 ,  H04W24/08 ,  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：US11363558B2

公开(公告)日：2022-06-14

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.

公开(公告)号：US10925001B2

公开(公告)日：2021-02-16

申请号：US16407447

申请日：2019-05-09

Applicant: Cisco Technology, Inc.

Inventor： Gautam Dilip Bhanage ,  Pooya Monajemi ,  Khashayar Mirfakhraei ,  Ardalan Alizadeh ,  Xu Zhang

IPC: G08C17/00 ,  H04W52/02 ,  G06N20/00 ,  G06N3/02 ,  H04W72/12

Abstract: In one embodiment, a device in a wireless network receives a target wake time (TWT) request from a wireless client. The device computes TWT parameters based on the received request. The device predicts, using the computed TWT parameters as input to a machine learning model, whether the computed TWT parameters will be accepted by the wireless client. The device provides the computed TWT parameters to the wireless client, based on a prediction by the machine learning model that the client will accept the computed TWT parameters.

公开(公告)号：US20200320397A1

公开(公告)日：2020-10-08

申请号：US16375315

申请日：2019-04-04

Applicant: Cisco Technology, Inc.

Inventor： Dantong LIU ,  Qing ZHAO ,  Khashayar MIRFAKHRAEI ,  Gautam Dilip BHANAGE ,  Xu Zhang ,  Ardalan Alizadeh

IPC: G06N3/08 ,  H04L29/08 ,  H04L12/24 ,  G06N3/04

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：US10794983B1

公开(公告)日：2020-10-06

申请号：US16521860

申请日：2019-07-25

Applicant: Cisco Technology, Inc.

Inventor： Mukul Chandail ,  Khashayar Mirfakhraei ,  Matthew Aaron Silverman ,  Xu Zhang ,  Zhigang Gao ,  Paul Jeffrey Stager

IPC: H04W24/02 ,  G01S3/32 ,  G01S11/04 ,  G01S11/06 ,  H04W4/029 ,  H04W64/00 ,  G06N20/00 ,  G01S5/02

Abstract: In one embodiment, a device obtains a machine learning model indicative of how to focus on particular location information from a plurality of radio frequency (RF) elements to provide an accurate location estimate of a wireless client based at least in part on angle-of-arrival information of the wireless client. When the device then obtains location information regarding the wireless client from the plurality of RF elements, it may apply the machine learning model to the location information regarding the wireless client to focus on particular location information of the location information from the plurality of RF elements. The device may then estimate a physical location of the wireless client based on focusing on the particular location information during a locationing computation.

公开(公告)号：US10785744B1

公开(公告)日：2020-09-22

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: H04W74/00 ,  H04W64/00 ,  H04W8/02 ,  H04W4/33 ,  H04B17/382 ,  H04W4/02 ,  H04B17/327

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：US20200296611A1

公开(公告)日：2020-09-17

申请号：US16299481

申请日：2019-03-12

Applicant: Cisco Technology, Inc.

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

IPC: H04W24/10 ,  H04W72/12 ,  H04W72/04 ,  H04W24/08

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.