公开(公告)号：US11202297B2

公开(公告)日：2021-12-14

申请号：US16146723

申请日：2018-09-28

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Christina Vlachou ,  Ioannis Pefkianakis ,  Kyu-Han Kim

IPC: H04W72/08 ,  H04W28/02 ,  H04W28/04 ,  H04W88/10 ,  H04W24/10

Abstract: Systems and methods described herein provide a centralized solution for interference mitigation that focuses on efficient spectrum management. Wireless Access Points (APs) collect interference measurements for wireless channels and generate corresponding interferer airtime estimates. The APs also determine Packet Error Rates (PERs) for wireless client devices currently being served via the channels by the APs. The APs send the interferer airtime measurements and the PERs to a centralized controller. If an interferer airtime estimate and a PER for a particular channel satisfy predefined threshold conditions, the controller modifies an allocation of wireless bandwidth for an AP that is currently using the channel and sends a message to the AP indicating how the allocation has been modified.

公开(公告)号：US10972155B2

公开(公告)日：2021-04-06

申请号：US15775907

申请日：2015-11-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Ioannis Pefkianakis ,  Sanjib Sur ,  Yunze Zeng

IPC: H04B7/0417 ,  H04W48/20 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06

Abstract: In some examples, a system can include a processing resource and a memory resource. The memory resource can store machine readable instructions to cause the processing resource to: (1) collect feedback from a physical (PHY)-layer of a client at a plurality of access points, before the client is associated with any one of the plurality of access points and (2) select an access point using a client channel correlation value calculated from the PHY-layer feedback, wherein the selected access point serves the client and a client group concurrently using precoding.

公开(公告)号：US20190239104A1

公开(公告)日：2019-08-01

申请号：US15884116

申请日：2018-01-30

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Ioannis Pefkianakis

IPC: H04W24/08 ,  H04W28/02 ,  H04L12/26

Abstract: Examples described herein include receiving an indicator of the quality of a wireless signal between an access device and a computing device, determining an upper data transfer rate from the indicator, and determining a range of data transfer rates. The range may include the upper data transfer rate and a second data transfer rate. Examples disclosed herein also include evaluating a throughput at the upper data transfer rate based on an error rate at the upper data transfer rate and evaluating a throughput at the second data rate based on an error rate at the second data transfer rate. Examples disclosed herein also include determining a peak data transfer rate within the range of data transfer rates based on the throughputs.

公开(公告)号：US20180375597A1

公开(公告)日：2018-12-27

申请号：US16061933

申请日：2016-02-19

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Sanjib Sur ,  Ioannis Pefkianakis ,  Souvik Sen

IPC: H04B17/336 ,  H04B7/0452 ,  H04B7/06

CPC classification number: H04B17/336 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0634

Abstract: An example communications device includes communications circuitry and control circuitry. The communications circuitry may wirelessly communicate with client devices. The control circuitry may determine signal-to-interference-plus-noise ratios (SINRs) for the client devices based on compressed client-side channel state information received from the client devices. The control circuitry may assign the client devices to multi-user-multiple-input-multiple-output (MU-MIMO) groups based on the SINRs.

公开(公告)号：US20200088869A1

公开(公告)日：2020-03-19

申请号：US16134304

申请日：2018-09-18

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Ioannis Pefkianakis ,  Kyu-Han Kim

IPC: G01S13/76 ,  H04W64/00 ,  G01S7/295

Abstract: This disclosure provides systems through which a wireless access point (AP) can determine the location of a client device with a high degree of accuracy. The AP uses CIR measurements for a plurality of directional beams used to communicate with the client device to determine a respective amplitude of a Line-of-Sight (LOS) path between the AP and the client device for each beam. The AP identifies a high-LOS-amplitude subset of the beams and, based on predefined radiation patterns associated with the beams included in the high-LOS-amplitude subset, determines a direction of the LOS path between the AP and the client device. The AP also determines a Time-of-Flight (ToF) for radio frames exchanged between the AP and the client device via the plurality of directional beams and uses the ToF to determine a distance between the AP and the client device.

公开(公告)号：US20190335377A1

公开(公告)日：2019-10-31

申请号：US15962949

申请日：2018-04-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Ioannis Pefkianakis

IPC: H04W40/20 ,  H04W16/28

Abstract: A method of adjusting a link in a wireless communication system is described. The method includes collecting a channel impulse response signal of a client device from a network device of a communication system at a first time instance. The method includes determining a first path data based on the channel impulse response signal. The method also includes making a determination that the client device is physically blocked from the network device, or that a geographical location of the client device has changed. The determination may be made by comparing the first path data with at least a second path data corresponding to at least a second time instance prior to the first time instance. The method further includes changing the communication between the network device and the client device in response to the determination.

公开(公告)号：US20190238207A1

公开(公告)日：2019-08-01

申请号：US15885306

申请日：2018-01-31

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Ioannis Pefkianakis ,  Sanjib Sur

IPC: H04B7/06 ,  H04W24/10 ,  H04W36/30

CPC classification number: H04B7/0695 ,  H04B7/0619 ,  H04W24/08 ,  H04W24/10 ,  H04W36/30

Abstract: An example system may comprise a millimeter wave (mmWave) transmitting device including instructions executable to: identify a plurality of mmWave signal transmission paths from the mmWave transmitting device to a receiving device; collect a channel measurement for each beam of a first portion of beams available at the mmWave transmitting device at each signal transmission path of the plurality of mmWave signal transmission paths; determine a plurality of properties of each signal transmission path of the plurality of mmWave signal transmission paths utilizing the corresponding channel measurements; predict, based on the plurality of properties, a signal metric for a second portion of the beams; and select, based on the predicted signal metric, a beam from the beams to be utilized to transmit a signal to the receiving device.

公开(公告)号：US20190020556A1

公开(公告)日：2019-01-17

申请号：US15750601

申请日：2015-08-27

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Ioannis Pefkianakis ,  Abhinav Parate ,  Shruti Sanadhya

IPC: H04L12/26 ,  H04L29/08 ,  H04W4/021 ,  H04L12/911

CPC classification number: H04L43/062 ,  G06Q10/06 ,  H04L43/067 ,  H04L43/16 ,  H04L47/70 ,  H04L67/22 ,  H04L67/24 ,  H04W4/021 ,  H04W8/005 ,  H04W48/06 ,  H04W48/16

Abstract: Example implementations may relate to an occupancy sensing system. For example, the occupancy sensing system may collect connection data and traffic data related to electronic devices that connect to the networking device. The occupancy sensing system may determine a number of resident devices and a number of high-traffic devices, based on the connection data or the traffic data. The occupancy sensing system may determine a number of the electronic devices that are coactive within an analysis time window, and may constrain the number of coactive electronic devices to a range from the number of high-traffic devices to the number of resident devices to generate an occupancy value.

公开(公告)号：US10887819B2

公开(公告)日：2021-01-05

申请号：US15962949

申请日：2018-04-25

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Ioannis Pefkianakis

IPC: H04W40/20 ,  H04W16/28 ,  H04W84/12 ,  H04B7/08 ,  H04B7/06

Abstract: A method of adjusting a link in a wireless communication system is described. The method includes collecting a channel impulse response signal of a client device from a network device of a communication system at a first time instance. The method includes determining a first path data based on the channel impulse response signal. The method also includes making a determination that the client device is physically blocked from the network device, or that a geographical location of the client device has changed. The determination may be made by comparing the first path data with at least a second path data corresponding to at least a second time instance prior to the first time instance. The method further includes changing the communication between the network device and the client device in response to the determination.

公开(公告)号：US20180212654A1

公开(公告)日：2018-07-26

申请号：US15845724

申请日：2017-12-18

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Ioannis Pefkianakis

IPC: H04B7/0452 ,  H04B7/0417 ,  H04B7/06

CPC classification number: H04B7/0452 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0626 ,  H04L25/0224

Abstract: An example communications device includes communications circuitry and control circuitry. The communications circuitry may wirelessly communicate with multiple receiver antennas concurrently via multiple transmit antennas. The control circuitry may execute an adaptive sounding process that may include, for each client connected to the communications device, performing a follow-up sounding for the client in response to determining that all of the following conditions are jointly satisfied: (a) a wireless channel of the client has significantly changed, as determined based on a channel correlation metric; (b) a wireless throughput has significantly decreased, as determined based on a throughput gradient metric; and (c) the client had a significant amount of recent traffic, as determined based on a traffic metric.