公开(公告)号：US11569884B2

公开(公告)日：2023-01-31

申请号：US17116975

申请日：2020-12-09

Applicant: Cisco Technology, Inc.

Inventor： Arunkumar Ravichandran ,  Pooya Monajemi ,  Ardalan Alizadeh

IPC: H04L12/26 ,  H04B7/06 ,  H04W76/15 ,  H04L5/00

Abstract: Out-of-link channel sounding using an out-of-band channel sounding link for multi-link devices (MLDs) in a wireless network may be provided. An Access Point (AP) may establish a first Wireless Communication Link (WCL) with a Multi-link Device (MLD). The AP may also establish a second WCL with the MLD. After establishing the first WCL, the AP may transmit a sounding trigger to the MLD on the first WCL. After transmission of the sounding trigger to the MLD on the first WCL, AP may transmit a Channel State Information (CSI) inquiry to the MLD on the second WCL. AP may receive a channel state quantification from the MLD on the second WCL in response to the CSI inquiry.

公开(公告)号：US20220303790A1

公开(公告)日：2022-09-22

申请号：US17833811

申请日：2022-06-06

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 ,  H04W24/02 ,  H04B17/391 ,  H04W64/00

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：US20220225325A1

公开(公告)日：2022-07-14

申请号：US17682049

申请日：2022-02-28

Applicant: Cisco Technology, Inc.

Inventor： Ardalan Alizadeh ,  Sivadeep Reddy Kalavakuru ,  Gautam D. Bhanage ,  John Matthew Swartz ,  Matthew Aaron Silverman

IPC: H04W72/04 ,  H04B7/06 ,  H04L43/0829 ,  H04B17/318

Abstract: Optimal determination of wireless network pathway configurations may be provided. A computing device may establish Multi-Access Point (AP) coordination between at least a first AP and a second AP. The first AP can determine an uplink operation is scheduled. When an uplink is scheduled, the first AP can switch its antenna to a narrow beamwidth. The first AP can then receive uplink transmissions from at least a client in the coverage area of the narrow beamwidth. After the uplink transmission, the first AP can then switch the antenna to a larger beamwidth for a next Multi-AP coordination operation.

公开(公告)号：US20220225205A1

公开(公告)日：2022-07-14

申请号：US17145218

申请日：2021-01-08

Applicant: Cisco Technology, Inc.

Inventor： Gautam D. Bhanage ,  Vishal Satyendra Desai ,  Ardalan Alizadeh ,  Khashayar Mirfakhraei

IPC: H04W40/16 ,  H04W76/30 ,  H04W80/02

Abstract: Optimal determination of wireless network pathway configurations may be provided. A computing device may detect, at a first network Access Point (AP), inference on a channel with a second AP. Then, the computing device can check availability of a redundant radio at the second AP. Based on the availability, the computing device can establish a new radio link with the redundant radio at the second AP and reroute data traffic over the new radio link to the second AP. After establishing the new radio link, the computing device can then sever the channel with the second AP.

公开(公告)号：US20220182119A1

公开(公告)日：2022-06-09

申请号：US17116975

申请日：2020-12-09

Applicant: Cisco Technology, Inc.

Inventor： Arunkumar Ravichandran ,  Pooya Monajemi ,  Ardalan Alizadeh

IPC: H04B7/06 ,  H04L5/00 ,  H04W76/15

Abstract: Out-of-link channel sounding using an out-of-band channel sounding link for multi-link devices (MLDs) in a wireless network may be provided. An Access Point (AP) may establish a first Wireless Communication Link (WCL) with a Multi-link Device (MLD). The AP may also establish a second WCL with the MLD. After establishing the first WCL, the AP may transmit a sounding trigger to the MLD on the first WCL. After transmission of the sounding trigger to the MLD on the first WCL, AP may transmit a Channel State Information (CSI) inquiry to the MLD on the second WCL. AP may receive a channel state quantification from the MLD on the second WCL in response to the CSI inquiry.

公开(公告)号：US11057831B2

公开(公告)日：2021-07-06

申请号：US16408546

申请日：2019-05-10

Applicant: Cisco Technology, inc.

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

IPC: H04W52/02 ,  H04W4/38 ,  H04L29/08

Abstract: In one embodiment, a supervisory service for a wireless network computes a compressive sensing schedule for a plurality of sensors in the wireless network. The service sends target wake time (TWT) messages to a subset of the plurality of sensors according to the computed compressive sensing schedule. The service receives, in response to the TWT messages, sensor readings from the subset of the plurality of sensors. The service performs compressive sensing on the received sensor readings.

公开(公告)号：US10965349B2

公开(公告)日：2021-03-30

申请号：US16559356

申请日：2019-09-03

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Fred J. Anderson ,  Ardalan Alizadeh ,  Huaiyi Wang

IPC: H04B7/0417 ,  H04B7/06 ,  H04L5/00

Abstract: In one embodiment, a method includes identifying a number of configured proactive repetitions in downlink transmissions from the base station, selecting k antenna states for receiving repetitive downlink transmissions among the number of antenna states, where k equals the number of configured proactive repetitions, and where each of the k antenna states corresponds to each of the repetitive downlink transmissions, transmitting a CSI report for each of the k antenna states to the base station, where a CSI report for an antenna state is used by the base station to adjust configurations for the corresponding downlink transmission, receiving signals for each of the k repetitive downlink transmissions from the base station using each of the k antenna states, and decoding the downlink transmission based on k sets of received signals, each of the k sets being received using each of the k selected antenna states.

公开(公告)号：US20250102683A1

公开(公告)日：2025-03-27

申请号：US18475839

申请日：2023-09-27

Applicant: Cisco Technology, Inc.

Inventor： Jerome Henry ,  Peiman Amini ,  Ardalan Alizadeh

IPC: G01S19/39 ,  G01S19/21

Abstract: Devices, systems, methods, and processes for calibrating clock signals of network devices are described herein. A device can initiate a ranging procedure with a reference device for synchronizing a clock signal of the device. The ranging procedure may utilize Fine Time Measurement (FTM), Ultra-Wide band (UWB), or similar protocols. The device can also synchronize the clock signal based on detection of ambient interference events. The device may also receive Global Navigation Satellite System (GNSS) data from a satellite and determine a pseudo range for the corresponding satellite based on the synchronized clock signal. The device may further transmit the GNSS data to a location engine. The location engine may aggregate the GNSS data received from a plurality of devices and determine a geolocation of the plurality of devices based on the aggregated GNSS data.

公开(公告)号：US20250097896A1

公开(公告)日：2025-03-20

申请号：US18469761

申请日：2023-09-19

Applicant: Cisco Technology, Inc.

Inventor： Jerome Henry ,  Ather Kanak ,  Ardalan Alizadeh ,  Joel Aller ,  Peiman Amini

IPC: H04W64/00 ,  H04B17/318 ,  H04W24/08

Abstract: Devices, systems, methods, and processes for detecting anomalous movements within network devices are described herein. Certain movements within networks devices are predictable and negligible. However, other movements may indicate a larger problem with the network, or network devices, especially when the network devices (e.g., access points) are within a stationary deployment. For example, a sudden movement of a network device may indicate that it has fallen, been moved, or is under threat of a physical attack. Many network devices are being deployed with various environmental sensors. These sensors can be utilized to detect movement of the network device. This can be done by evaluating the received signal strength indicator levels as well as the output of the environmental sensor. If an anomalous movement is detected, preventative actions can be taken such as rebooting or limiting access. This can be done on the network device or by a centralized management system.

公开(公告)号：US20250085441A1

公开(公告)日：2025-03-13

申请号：US18466659

申请日：2023-09-13

Applicant: Cisco Technology, Inc.

Inventor： Peiman Amini ,  Ardalan Alizadeh ,  Jerome Henry ,  Arya Fallahi ,  Navid Reyhanian

IPC: G01S19/46

Abstract: Described herein are devices, systems, methods, and processes for estimating the geolocation of network devices by jointly utilizing pseudorange measurements from global navigation satellite system (GNSS) satellites and terrestrial-based ranging measurements between network devices. Each network device is equipped with a GNSS receiver that collects pseudorange data from each satellite link at time intervals. Terrestrial-based ranging measurements between network devices can also be collected. The receiver clock error can be accounted for at least in part by over-the-air time synchronization of network devices. To mitigate the impact of multipath and improve accuracy, pseudorange measurements with less than satisfactory quality metrics can be filtered out. In some embodiments, the geolocation of anchor network devices can be estimated with high accuracy first, and then the rest of the non-anchor network devices may be localized in a second-stage localization process.