公开(公告)号：US20240333404A1

公开(公告)日：2024-10-03

申请号：US18191553

申请日：2023-03-28

Applicant: Cisco Technology, Inc.

Inventor： Sivadeep KALAVAKURU ,  Fred ANDERSON ,  Xiangxiang FANG ,  Ardalan ALIZADEH

IPC: H04B17/11 ,  H04L1/00 ,  H04W52/52

CPC classification number: H04B17/11 ,  H04L1/0003 ,  H04W52/52

Abstract: Real-time radio self-calibration may be provided. The self-calibration may begin by sampling a Transmission (TX) signal. An achievable Error Vector Magnitude (EVM) for one or more frames may be determined based on the TX signal. Link budgets for clients may be determined using a TX power and a supported Modulation and Coding Scheme (MCS). A per packet TX power is adjusted based on the achievable EVM and a TX retry rate. The PA linearity of the radio may also be adjusted based on the achievable EVM and the link budget. The client may be regrouped into a new MCS based on the link budget.

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：US20250062838A1

公开(公告)日：2025-02-20

申请号：US18936896

申请日：2024-11-04

Applicant: Cisco Technology, Inc.

Inventor： Sivadeep KALAVAKURU ,  Fred ANDERSON ,  Xiangxiang FANG ,  Ardalan ALIZADEH

IPC: H04B17/11 ,  H04L1/00 ,  H04W52/52

Abstract: Real-time radio self-calibration may be provided. The self-calibration may begin by sampling a Transmission (TX) signal. An achievable Error Vector Magnitude (EVM) for one or more frames may be determined based on the TX signal. Link budgets for clients may be determined using a TX power and a supported Modulation and Coding Scheme (MCS). A per packet TX power is adjusted based on the achievable EVM and a TX retry rate. The PA linearity of the radio may also be adjusted based on the achievable EVM and the link budget. The client may be regrouped into a new MCS based on the link budget.

公开(公告)号：US20240334341A1

公开(公告)日：2024-10-03

申请号：US18192489

申请日：2023-03-29

Applicant: Cisco Technology, Inc.

Inventor： Sivadeep Reddy KALAVAKURU ,  Fred Jay ANDERSON ,  Saber SOLTANI ,  Xiangxiang FANG

IPC: H04W52/14 ,  H04B17/309 ,  H04B17/318 ,  H04W64/00

CPC classification number: H04W52/143 ,  H04B17/318 ,  H04B17/347 ,  H04W64/00 ,  H04B7/0452

Abstract: Improving transmitter Effective Isotropic Radiated Power (EIRP) may be provided. Improving EIRP may include sending a trigger frame to a client and receiving an uplink transmission from the client in response. A client Transmission (TX) power and a Received Signal Strength Indication (RSSI) associated with the client may be determined using the uplink transmission. Next, a client location may be determined. A pathloss associated with the client may be determined using the client location and the uplink transmission. A directional gain may then be determined using the client TX power, the pathloss, and the RSSI. An array gain is determined based on the directional gain. An Access Point (AP) TX power is adjusted based on the array gain.

公开(公告)号：US20210344461A1

公开(公告)日：2021-11-04

申请号：US16864052

申请日：2020-04-30

Applicant: Cisco Technology, Inc.

Inventor： Gautam D. BHANAGE ,  John M. BLOSCO ,  Sivadeep R. KALAVAKURU ,  Xiangxiang FANG ,  Khashayar MIRFAKHRAEI

IPC: H04L5/00 ,  H04W24/02

Abstract: Embodiments for preliminary antenna configuration for a radio in an access point are described. A preliminary antenna configuration with a first number of antennas transmitting at a first power level based on a maximum transmission power for the radio is used to determine a second antenna configuration based on network level factors, where the second antenna configuration includes a second number of antennas. The second antenna configuration is used to determine a third antenna configuration from the second antenna configuration, where the third antenna configuration includes a third number of antennas transmitting at a third power level based on a client transmission factors for a plurality of client devices connected to the access point. The third antenna configuration is used to transmit network traffic from the access point to the plurality of client devices using the third antenna configuration.