公开(公告)号：US20200037109A1

公开(公告)日：2020-01-30

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: H04W4/029

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：US20240348284A1

公开(公告)日：2024-10-17

申请号：US18301511

申请日：2023-04-17

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron SILVERMAN ,  Robert E. BARTON ,  Brian D. HART ,  Jerome HENRY ,  Ardalan ALIZADEH ,  Vishal S. DESAI ,  John Matthew SWARTZ

IPC: H04B1/7183

CPC classification number: H04B1/7183 ,  H04W84/12

Abstract: Access Point ranging and placement on a floorplan may be provided. A host AP may range each neighbor AP of the host AP. One or more neighbor APs that failed ranging with the host AP may be categorized in a failed neighbor AP list. The host AP may re-range each of the one or more neighbor APs in the failed neighbor AP list with a modified ranging parameter. At least one neighbor AP of the one or more neighbor APs may be categorized in the failed neighbor AP list that succeeded in re-ranging with the host AP in an extended range neighbor AP list.

公开(公告)号：US20240049133A1

公开(公告)日：2024-02-08

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 ,  H04W74/08 ,  H04W72/04

CPC classification number: H04W52/0216 ,  H04W52/28 ,  H04W74/0816 ,  H04W72/0446

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：US20250126557A1

公开(公告)日：2025-04-17

申请号：US19002336

申请日：2024-12-26

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：US20240345259A1

公开(公告)日：2024-10-17

申请号：US18301449

申请日：2023-04-17

Applicant: Cisco Technology, Inc.

Inventor： Ashish SHEIKH ,  Ardalan ALIZADEH ,  Peiman AMINI ,  Niloo BAHADORI ,  Matthew Aaron SILVERMAN

IPC: G01S19/21

CPC classification number: G01S19/215

Abstract: Global Navigation Satellite System (GNSS) interference detection may be provided. A satellite tracking table for a first Access Point (AP) may be created. The satellite tracking table may include a listing of a plurality of satellites of a Global Navigation Satellite System (GNSS) available for the first AP and expected satellite parameters for each of the plurality of satellites. A derived satellite parameter may be determined from a received GNSS signal. The derived satellite parameter may be compared with an corresponding expected satellite parameter. The corresponding expected satellite parameter may be determined from the satellite tracking table. An interference event may be determined when the derived satellite parameter differs from the corresponding expected satellite parameter by at least a predetermined amount.

公开(公告)号：US20240056226A1

公开(公告)日：2024-02-15

申请号：US17818419

申请日：2022-08-09

Applicant: Cisco Technology, Inc.

Inventor： Ardalan ALIZADEH ,  Sivadeep Reddy KALAVAKURU ,  Matthew Aaron SILVERMAN ,  John Matthew SWARTZ

IPC: H04L1/18 ,  H04L1/08 ,  H04W16/28

CPC classification number: H04L1/1812 ,  H04L1/08 ,  H04W16/28

Abstract: A network of access points (AP) in a high-density environment may be provided. A number of packet transmission retries for one or more of the AP may be determined by setting a number, m, of retries for transmitting a data packet, where m is the upper limit of the number of retries. Data packets are then transmitted m times. Upon transmitting the data packet m times, a success probability SP(u,m) for transmission of the data packet, where u is the number of users, may be calculated. The transmission of the data packet may be repeated m−x times where x is an integer. Upon calculating the success probability for m−x times, a success probability SP(u,m−x) for transmission of the data packet may be calculated. If SP (u,m−x) is larger than SP(u,m) then x may be decreased by one and actions (b)-(f) may be repeated. If SP (u,m−x) is not larger than SP(u,m) then m−x may be set as the maximum number of retries for the data packet.

公开(公告)号：US20220283258A1

公开(公告)日：2022-09-08

申请号：US17192434

申请日：2021-03-04

Applicant: Cisco Technology, Inc.

Inventor： Jerome HENRY ,  Robert E. BARTON ,  Matthew Aaron SILVERMAN ,  Vishal Satyendra DESAI ,  Pooya MONAJEMI

IPC: G01S3/74 ,  H04W64/00 ,  G01S13/87

Abstract: Hybrid ranging may be provided. A coverage environment may be divided into a plurality of areas and a corresponding plurality accuracy gradients for each of the plurality of areas may be determined. Passive ranging may be implemented for ones of the plurality of areas that have a high accuracy gradient and one of a high client device density and low client device movement. Active ranging may be implemented for ones of the plurality of areas that have a low client device density. Based on at least one of a level of client device density and movement speed of client devices, switching may be performed between passive ranging and active ranging for ones of the plurality of areas that have at least one of high client device density and high client device movement.

公开(公告)号：US20240349234A1

公开(公告)日：2024-10-17

申请号：US18300696

申请日：2023-04-14

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron SILVERMAN ,  Brian D. HART ,  Jonathan Matthew SWARTZ

IPC: H04W64/00 ,  G01S11/06 ,  H04B17/318

CPC classification number: H04W64/003 ,  G01S11/06 ,  H04B17/318 ,  H04W84/12

Abstract: Transmission (Tx) power variation mitigation for Received Strength of Signal Indicator (RSSI) location may be provided. RSSI data for a station may be received from a plurality of Access Points (APs). The RSSI data may include a RSSI value determined from a Block Acknowledgement (BA) packet and a Starting Sequence Number (SSN) and a bitmap of the BA packet. The plurality of APs may be clustered into one or more clusters based on a combination of the SSN and the bitmap. One or more APs having a same combination of the SSN and the bitmap are clustered into one cluster. A probable location of the station may be determined in each of the one or more clusters based on RSSI values received from the one or more APs of each of the one or more clusters. A final location of the station may be determined based on merging probable locations from the one or more clusters.

公开(公告)号：US20240340775A1

公开(公告)日：2024-10-10

申请号：US18295371

申请日：2023-04-04

Applicant: Cisco Technology, Inc.

Inventor： Raj Kumar TANEJA ,  Matthew Aaron SILVERMAN ,  Lucy HUANG

IPC: H04W48/16

CPC classification number: H04W48/16 ,  H04W84/12 ,  H04W88/08

Abstract: Prioritized scheduling of scan radio for fast location and rogue update rates may be provided. Channel events for a plurality of channels of an Access Point (AP) may be tracked. A scan score for at least one channel of the plurality of channels of the AP may be updated based on tracking of the channel events. A modified channel scanning schedule for the plurality of channels may be received based on scan scores for the plurality of channels. The modified channel scanning schedule may comprise an adjusted frequency of channel scan for the at least one channel of the plurality of channels for a predetermined number of scan cycles based on the updated scan score for the at least one channel. Channel scan for the plurality of channels may be performed based on the modified channel scanning schedule.

公开(公告)号：US20240323991A1

公开(公告)日：2024-09-26

申请号：US18430591

申请日：2024-02-01

Applicant: Cisco Technology, Inc.

Inventor： Fred J. ANDERSON ,  Paul Jeffrey STAGER ,  Evgeny YANKEVICH ,  Matthew Aaron SILVERMAN

IPC: H04W72/541 ,  G01S7/02 ,  H04W72/0453 ,  H04W88/08

CPC classification number: H04W72/541 ,  G01S7/021 ,  H04W72/0453 ,  H04W88/08

Abstract: Methods and systems for distinguishing between radar signals and Wi-Fi signals are provided. When a set of electromagnetic signals are received, various tests are performed on the signals to determine if the signals are associated with radar pulses or if the signals are more likely to be associated with stray WI-Fi signals or other non-radar interference. One such test relies on the relatively small variance of frequencies used by radar pulses when compared to the high variation of Wi-Fi signals. Another test relies on the relatively low peak to average power ratio of signals associated with radar pulses when compared to Wi-Fi signals. The tests described herein are an improvement on existing methods for distinguishing radar signals from Wi-Fi signals and result in less switching of Wi-Fi channels due to erroneously detected radar signals.