公开(公告)号：US20220066010A1

公开(公告)日：2022-03-03

申请号：US17123904

申请日：2020-12-16

Applicant: Cisco Technology, Inc.

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

IPC: G01S13/02 ,  G01S13/76 ,  G01S5/14 ,  H04W76/15 ,  H04W76/11 ,  H04W64/00

Abstract: Presented herein are infrastructure triggering techniques for secure Ultra-Wideband (UWB) ranging. In one example, a method may include providing UWB ranging parameters to a mobile device via a first radio communication, wherein the first radio communication is a non-UWB radio communication; and triggering the mobile device to perform UWB ranging with a UWB anchor, wherein the triggering is performed using a second radio communication. In another example, a method may include, obtaining, by a mobile device, UWB ranging parameters for a geographic area; obtaining a UWB ranging instruction for the geographic area; and performing UWB ranging with a target UWB anchor based on the UWB ranging parameters and the UWB ranging instruction.

公开(公告)号：US20210297164A1

公开(公告)日：2021-09-23

申请号：US17342167

申请日：2021-06-08

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Pooya Monajemi ,  Vishal Satyendra Desai ,  John Martin Blosco

IPC: H04B15/00 ,  H04B17/318 ,  H04B1/38

Abstract: An access point allocates resource units within a first channel to mitigate interference from an adjacent second channel. The access point obtains a measure of signal strength corresponding to each wireless device attached to an access point, and assigns, for each wireless device, resource units with a first frequency band of the first channel to mitigate interference with a second frequency band of a second channel adjacent to the first channel. An assignment between a set of resource units and a particular wireless device is based on the measure of signal strength corresponding to the particular wireless device. The access point communicates with the wireless devices on the resource units.

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：US20200275282A1

公开(公告)日：2020-08-27

申请号：US16287207

申请日：2019-02-27

Applicant: Cisco Technology, Inc.

Inventor： Qing Zhao ,  Dantong Liu ,  Fred Jay Anderson ,  Matthew Aaron Silverman

IPC: H04W16/10 ,  H04W72/04

Abstract: A distributed controller of local radio resources implements a hybrid FFR system. The distributed controller provides user channel information to a central controller of regional radio resources. The distributed controller also obtains an FFR plan from the central controller. The FFR plan designates for an access point associated with the distributed controller, a central frequency band, an edge frequency band, and a distribution of user devices connected to the access point. The distribution indicates whether each user device communicates with the access point via the central frequency band or via the edge frequency band. The distributed controller provisions the access pint to connect to the user devices according to the FFR plan, and adjusts the distribution of user devices locally based on a change in the user channel information.

公开(公告)号：US10555332B2

公开(公告)日：2020-02-04

申请号：US15792624

申请日：2017-10-24

Applicant: Cisco Technology, Inc.

Inventor： Amir Hosein Kamalizad ,  Matthew Aaron Silverman

IPC: H04W72/12 ,  H04L25/02 ,  H04W72/08 ,  H04B17/336 ,  H04L1/00 ,  H04W28/18

Abstract: A method for transmitting a data transmission based on the classification of an interfering signal is described. The method comprises transmitting a first data transmission within a frequency band and detecting an interfering signal within the frequency band. The method comprises classifying the interfering signal as one of a plurality of interfering signal types. The method comprises transmitting, based on the classification, a second data transmission within the frequency band.

公开(公告)号：US12267120B2

公开(公告)日：2025-04-01

申请号：US18473688

申请日：2023-09-25

Applicant: Cisco Technology, Inc.

Inventor： Salvatore Valenza ,  Samer Salam ,  Taha Hajar ,  Nikodin Ristanovic ,  Arun G. Khanna ,  Matthew Aaron Silverman ,  James Florwick

IPC: H04B17/391 ,  G06T15/06 ,  G06T15/08 ,  H04W28/08 ,  H04W28/086 ,  H04W36/00 ,  H04W72/29 ,  H04W84/12

Abstract: The present technology is directed to visualizing a Wi-Fi access point (AP) signal propagation pattern through multiple floors. The present technology can execute a Wi-Fi signal propagation model corresponding to a first AP on a first floor of a building plan and a second AP on a second floor of the building plan. The Wi-Fi signal propagation model calculates a Wi-Fi signal propagation pattern for a plurality of APs including the first AP and the second AP. The present technology can further present a visualization of the Wi-Fi signal propagation pattern for the plurality of APs, wherein the Wi-Fi signal propagation pattern for the first AP on the first floor of the building plan projects onto the second floor of the building plan.

公开(公告)号：US12231987B2

公开(公告)日：2025-02-18

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 ,  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：US12219477B2

公开(公告)日：2025-02-04

申请号：US17816877

申请日：2022-08-02

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Pooya Monajemi ,  Ardalan Alizadeh ,  Sivadeep Reddy Kalavakuru

IPC: H04W52/02 ,  H04W52/28 ,  H04W72/0446 ,  H04W74/0816

Abstract: Network traffic interference detection and management may be provided. An infringement event by an infringing Access Point (AP) on a Restricted Target Wake Time (rTWT) transmission opportunity (TxOp) associated with a victim AP may be detected, and information associated with the infringement event may be added to an infringement list, wherein the information includes a MAC address associated with the infringing AP. A controller, may receive the infringement list and notify the infringement event to the infringing AP. The infringing AP may determine whether a transmission associated with the infringement event is low latency and high priority. When the transmission is not low latency and high priority the infringing AP may modify future transmissions based on the notification. When the transmission is low latency and high priority the infringing AP may notify the controller that the transmission is low latency and high priority. The controller may then create a negotiation between the victim AP and the infringing AP, wherein the negotiation comprises managing future transmissions of the victim AP and the infringing AP.

公开(公告)号：US20240380640A1

公开(公告)日：2024-11-14

申请号：US18356550

申请日：2023-07-21

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Malcolm Muir Smith ,  Brian Donald Hart ,  Indermeet Singh Gandhi ,  John Matthew Swartz

IPC: H04L25/02 ,  H04W88/08

Abstract: The present disclosure is directed to simultaneous channel sounding on multiple MLO channels followed by determining phase and amplitude corrections based on channel impulse responses obtained on each MLO channel. The corrections are then used in subsequent extrapolation of channel sounding on one channel to another. In one aspect, a method includes transmitting, on each radio interface of a first multi-link device, a corresponding sounding probe to a second multi-link device; determining, by each radio interface of the first multi-link device, a corresponding channel impulse response based on the corresponding sound probe to yield a plurality of channel impulse responses; determining an offset between the plurality of channel impulse responses; and using the offset during a subsequent extrapolation of a sounding probe on one radio interface to a second radio interface of the first multi-link device.