公开(公告)号：US20250089013A1

公开(公告)日：2025-03-13

申请号：US18465594

申请日：2023-09-12

Applicant: Cisco Technology, Inc.

Inventor： Jerome Henry ,  Peiman Amini ,  Ardalan Alizadeh

IPC: H04W64/00 ,  H04W24/10

Abstract: Described herein are devices, systems, methods, and processes for improving the accuracy of access point (AP) location in a Wi-Fi network using client device data and AP ranging measurements. APs may be deployed across a specific area. The APs can range to one another and form a matrix of measurements. Techniques such as semidefinite programming or multidimensional scaling (MDS) can be employed to transform these AP-to-AP ranges into a set of coordinates. Client devices in the area may also range to the APs. The client devices may provide their location measurement report (LMR) feedback and geo-position estimation to the network. The client devices-provided data, along with the AP-to-AP matrices, may be returned to a location server. The location server can use the data to refine the accuracy of the AP-to-AP graph and ascertain the most probable geo-position of the APs.

公开(公告)号：US20250055745A1

公开(公告)日：2025-02-13

申请号：US18920576

申请日：2024-10-18

Applicant: Cisco Technology, Inc.

Inventor： Ardalan Alizadeh ,  Sivadeep Reddy Kalavakuru ,  Matthew Aaron Silverman ,  Mohsen Jamalabdollahi ,  Fred Jay Anderson

IPC: H04L27/26 ,  H04B1/04

Abstract: Crest Factor Reduction (CFR) parameters are determined for a dual band Power Amplifier (PA). A first band of the dual band PA is associated with a first Multi-Link Operation (MLO) link and a second band of the dual band PA is associated with a second MLO link. Determining the CFR parameters comprises determining based on a configuration of the first MLO link and the second MLO link. A first portion of the CFR parameters is provided to a first crest factor reduction block. First portion of the CFR parameters comprises a first clipping threshold associated with the first band and first filter coefficients associated with the first band. A second portion of the CFR parameters is provided to a second crest factor reduction block. The second portion of the CFR parameters comprises a second clipping threshold associated with the second band and second filter coefficients associated with the second band.

公开(公告)号：US20240072828A1

公开(公告)日：2024-02-29

申请号：US17822811

申请日：2022-08-29

Applicant: Cisco Technology, Inc.

Inventor： Sivadeep Reddy Kalavakuru ,  Ardalan Alizadeh ,  John Martin Blosco ,  Peiman Amini ,  Clark Carty

IPC: H04B1/036 ,  H04W52/20 ,  H04W52/30

CPC classification number: H04B1/036 ,  H04W52/20 ,  H04W52/30

Abstract: Improved Radio Frequency (RF) performance by optimizing temperature may be provided. A plurality of heatmaps may be created associating a plurality of component heat characteristics, of a plurality of components of a device, with a plurality of pre-defined performance trade-off states. Next, a shortest path through the plurality of pre-defined performance trade-off states may be determined. The device may then be placed in successive ones of the plurality of pre-defined performance trade-off states according to the determined shortest path until a Transmit (TX) performance target is met.

公开(公告)号：US20240023179A1

公开(公告)日：2024-01-18

申请号：US17812739

申请日：2022-07-15

Applicant: Cisco Technology, Inc.

Inventor： Pooya Monajemi ,  Ardalan Alizadeh ,  Matthew Aaron Silverman ,  Brian D. Hart ,  Vishal Satyendra Desai ,  Santosh Babaji Kulkarni ,  Young IL Choi

IPC: H04W76/15

CPC classification number: H04W76/15 ,  H04W88/08

Abstract: An arrangement of three radios maybe provided. The three radios define first and second outer data links and a middle data link. Access to the arrangement of three radios can be biased to the middle data link in one direction upon a data transmission through the first and second outer data links being dominate in an opposite direction. Data transmission with enhanced multi-link single radio (eMLSR) client devices can be prioritized lower than data transmission with simultaneous transmit and receive radio (STR) client devices and non-simultaneous transmit and receive radio (NSTR) client devices. A radio can be configured for data transmission with a client device. The range of the radio is limited when the data traffic through the radio exceeds a determined number of bytes of data in a determined amount of time.

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.