公开(公告)号：US20220416853A1

公开(公告)日：2022-12-29

申请号：US17305022

申请日：2021-06-29

Applicant: Cisco Technology, Inc.

Inventor： Ardalan ALIZADEH ,  Matthew A. SILVERMAN ,  Pooya MONAJEMI ,  Gautam D. BHANAGE ,  Sivadeep R. KALAVAKURU

IPC: H04B7/0456 ,  H04B7/0452 ,  H04B7/0404

Abstract: Techniques for peer-to-peer (P2P) transmission in a multi-user (MU) multiple-input-multiple-output (MIMO) environment. A first wireless station (STA), including a plurality of radio antennas, identifies channel state information (CSI) relating to a connection between the first STA and a wireless access point (AP). The first STA determines connection information relating to a MU MIMO P2P connection between the first STA and a second STA. The first STA generates a plurality of values relating to precoding for the plurality of radio antennas, based on the CSI and the connection information. The first STA and the second STA exchange data over the P2P connection, using the plurality of values relating to precoding.

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：US20240334370A1

公开(公告)日：2024-10-03

申请号：US18194196

申请日：2023-03-31

Applicant: Cisco Technology, Inc.

Inventor： Sivadeep Reddy KALAVAKURU ,  Laurent Alexandre PIERRUGUES ,  Jerome HENRY ,  Behrouz SHAYESTEH ,  Ardalan ALIZADEH

IPC: H04W64/00 ,  G01S13/76 ,  H04W56/00

CPC classification number: H04W64/00 ,  G01S13/765 ,  H04W56/006

Abstract: Fine Time Measurement (FTM) improvement for AP self-positioning may be provided. First, an Access Point (AP) graph may be generated. An AP pair may be determined for FTM AP self-positioning based on the AP graph, A plurality of Transmit (TX) signals may be sent to a paired AP of the AP pair using two more TX antennas, wherein the plurality of TX signals include FTM action frames and have a first constant Cyclic Shift Delay (CSD). A plurality of Receive (RX) signals may be received from the paired AP using two or more RX antennas, wherein the plurality of RX signals include FTM action frames and have a second constant CSD, Outlier RX signals having a low Received Signal Strength Indicator (RSSI) may be removed from the plurality of RX signals. An AP position may be determined based on the plurality of RX signals.

公开(公告)号：US20240188000A1

公开(公告)日：2024-06-06

申请号：US18061927

申请日：2022-12-05

Applicant: Cisco Technology, Inc.

Inventor： Ardalan ALIZADEH ,  Sivadeep R. KALAVAKURU ,  Peiman AMINI ,  Vishal S. DESAI

IPC: H04W52/28 ,  H04W24/08 ,  H04W52/24 ,  H04W52/36

CPC classification number: H04W52/285 ,  H04W24/08 ,  H04W52/243 ,  H04W52/367 ,  H04W84/12

Abstract: Techniques for reducing wireless interference are provided. A wireless local area network (WLAN) is providing, by an access point using a first radio. It is determined to initiate a geolocation process for the access point using a second radio. A first amount of interference at the second radio caused by the first radio is determined, and either a hot start geolocation acquisition process or a cold start geolocation acquisition process is selectively used for the AP based on comparing the first amount of interference to one or more criteria.

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：US20240015788A1

公开(公告)日：2024-01-11

申请号：US18150691

申请日：2023-01-05

Applicant: Cisco Technology, Inc.

Inventor： Matthew A. SILVERMAN ,  Brian D. HART ,  Ardalan ALIZADEH ,  Robert E. BARTON ,  Jerome HENRY ,  Juan Carlos ZUNIGA ,  Malcolm M. SMITH ,  Scott R. BLUE ,  John M. SWARTZ

IPC: H04W74/08 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04W74/0816 ,  H04L5/0007 ,  H04L5/0055 ,  H04L1/0058

Abstract: Disclosed methods and systems for efficiently gathering reports from stations coupled to an access point via a wireless network. In some cases, the reports may be attached to block acknowledge frames, which often occur. Alternatively, when multiple stations operate with assigned resource units during a transmission opportunity (TXOP), the reports are embedded in the spare capacity of a physical protocol data units used during the TXOP.

公开(公告)号：US20230354052A1

公开(公告)日：2023-11-02

申请号：US18173384

申请日：2023-02-23

Applicant: Cisco Technology, Inc.

Inventor： Vishal S. DESAI ,  Peiman AMINI ,  Ardalan ALIZADEH ,  Sachin D. WAKUDKAR

IPC: H04W16/18 ,  H04W52/30 ,  H04W24/10

CPC classification number: H04W16/18 ,  H04W52/30 ,  H04W24/10 ,  H04W88/08

Abstract: A network controller and various methods for grouping access points for AFC are presented. A method includes assigning a plurality of access points to a plurality of groups based at least in part on stored AFC reports for the plurality of access points, determining, for each group of the plurality of groups, a centroid and an uncertainty range, and generating, for each group of the plurality of groups, an AFC query using the determined centroid and uncertainty range for the corresponding group.

公开(公告)号：US20220394582A1

公开(公告)日：2022-12-08

申请号：US17339695

申请日：2021-06-04

Applicant: Cisco Technology, Inc.

Inventor： Ardalan ALIZADEH ,  Gautam D. BHANAGE ,  Pooya MONAJEMI ,  Sivadeep R. KALAVAKURU ,  Matthew A. SILVERMAN

IPC: H04W36/30 ,  H04W48/20 ,  H04L1/18

Abstract: A method includes transmitting a message over a first link using a first radio of a plurality of radios of a multi-link device and in response to determining that the message was not properly received, selecting a second radio of the plurality of radios of the multi-link device. A second link of the second radio provides a higher probability than the first link that the message will be properly received. The method also includes retransmitting the message over the second link using the second radio.

公开(公告)号：US20220368477A1

公开(公告)日：2022-11-17

申请号：US17302805

申请日：2021-05-12

Applicant: Cisco Technology, Inc.

Inventor： Sivadeep R. KALAVAKURU ,  Ardalan ALIZADEH

IPC: H04L5/00 ,  H04B1/04 ,  H04L1/00

Abstract: Embodiments herein describe assigning different linearity operating points of a front end of a radio to groups of user devices when transmitting data using OFDMA. That is, when transmitting a PPDU to a first group of user devices, an access point (AP) may set the front end of the radio to a lower linearity operating point than when transmitting a PPDU to a second group of user devices. Using a higher linearity operating point can increase the data rate used to transmit the PPDU—e.g., the AP can use a higher modulation coding scheme (MCS). This can reduce the time the PPDUs have to wait in a queue before being transmitted.

公开(公告)号：US20220312421A1

公开(公告)日：2022-09-29

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: H04W72/04

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.