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：US11579236B2

公开(公告)日：2023-02-14

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 ,  G01S5/06 ,  H04W64/00 ,  H04W24/04

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：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：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.

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：US10797805B1

公开(公告)日：2020-10-06

申请号：US16521109

申请日：2019-07-24

Applicant: Cisco Technology, Inc.

Inventor： Khashayar Mirfakhraei ,  Ardalan Alizadeh ,  Xu Zhang ,  Gautam Dilip Bhanage ,  Daniel Joseph Lyons

IPC: G06N99/00 ,  H04L12/24 ,  H04W24/04 ,  H04B17/10 ,  G06N3/08 ,  H04L29/08 ,  H04W88/12 ,  H04W88/08

Abstract: In one embodiment, a process tracks measured carrier frequency offsets (CFOs) of identified transmitters over a period of activity of the identified transmitters, and determines predicted CFOs for the identified transmitters and predicted transmitter behavior as a probability of specific transmitters of the identified transmitters being active at given times based on the activity of the identified transmitters. The process may then determine, based on the predicted CFOs and predicted transmitter behavior, CFO ranges that a receiver should expect for upcoming packets, and instructs the receiver to use the CFO ranges as a prioritized list of dynamically selected CFOs to use to extract single or colliding packets from among potential interferences using frequency demodulation.

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.

公开(公告)号：US11758508B2

公开(公告)日：2023-09-12

申请号：US17833824

申请日：2022-06-06

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

CPC classification number: H04W64/003 ,  G01S13/762 ,  H04W16/28

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：US11132608B2

公开(公告)日：2021-09-28

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

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.