Patents by Inventor Ioannis Pefkianakis

Ioannis Pefkianakis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190239104
    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.
    Type: Application
    Filed: January 30, 2018
    Publication date: August 1, 2019
    Inventor: Ioannis Pefkianakis
  • Publication number: 20190238207
    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.
    Type: Application
    Filed: January 31, 2018
    Publication date: August 1, 2019
    Inventors: Ioannis Pefkianakis, Sanjib Sur
  • Publication number: 20190069208
    Abstract: In some examples, a computing device may comprise a processing resource and a memory resource storing machine-readable instructions to cause the processing resource to proactively identify a line-of-sight (LOS) blockage of a network signal transmitted on a millimeter-wave link, and reroute network traffic from the millimeter-wave link to a wireless local area network (WLAN) transmission channel in response to identifying the LOS blockage of the network signal.
    Type: Application
    Filed: August 31, 2017
    Publication date: February 28, 2019
    Inventors: Ioannis Pefkianakis, Sanjib Sur
  • Publication number: 20190020556
    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.
    Type: Application
    Filed: August 27, 2015
    Publication date: January 17, 2019
    Inventors: Ioannis Pefkianakis, Abhinav Parate, Shruti Sanadhya
  • Patent number: 10171140
    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 select, based on the SINRs and in consideration of multiple possible bandwidth settings, a set of multi-user-multiple-input-multiple-output (MU-MIMO) groups each with an assigned bandwidth setting.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: January 1, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Ioannis Pefkianakis, Sanjib Sur
  • Publication number: 20180375597
    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.
    Type: Application
    Filed: February 19, 2016
    Publication date: December 27, 2018
    Inventors: Sanjib Sur, Ioannis Pefkianakis, Souvik Sen
  • Publication number: 20180331729
    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.
    Type: Application
    Filed: November 25, 2015
    Publication date: November 15, 2018
    Inventors: Ioannis Pefkianakis, Sanjib Sur, Yunze Zeng
  • Patent number: 10090895
    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.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: October 2, 2018
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Ioannis Pefkianakis
  • Patent number: 10051685
    Abstract: Examples described herein relate to adapting a radio of a millimeter-wave device. In some such examples, the millimeter-wave device is to include a first radio to operate at a first beam direction based on a first set of channel state information (CSI). The millimeter-wave device is also to include a second radio to measure a second set of CSI. The millimeter-wave device is then to include a set of instructions to adapt the first radio to operate at an adapted beam direction based on a third set of CSI. The third set of CSI is to include a signal strength at the adapted beam direction that the millimeter-wave device is to determine based on the first set of CSI and the second set of CSI.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: August 14, 2018
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Ioannis Pefkianakis, Sanjib Sur
  • Publication number: 20180212654
    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.
    Type: Application
    Filed: December 18, 2017
    Publication date: July 26, 2018
    Inventor: Ioannis Pefkianakis
  • Publication number: 20180124694
    Abstract: In some examples, a method includes estimating a signal-to-interference-plus noise ratio (SINR) value between a wireless client and each Access Point (AP) of a plurality of APs based on Channel State Information (CSI) between the wireless client and each AP of the plurality of APs and selecting an AP of the plurality of APs to be associated with the wireless client based on a channel bandwidth of the wireless client and the estimated SINR value between the wireless client and each AP of the plurality of APs.
    Type: Application
    Filed: October 27, 2016
    Publication date: May 3, 2018
    Inventors: Ioannis Pefkianakis, Yunze Zeng
  • Publication number: 20180092102
    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 select, based on the SINRs and in consideration of multiple possible bandwidth settings, a set of multi-user-multiple-input-multiple-output (MU-MIMO) groups each with an assigned bandwidth setting.
    Type: Application
    Filed: September 26, 2016
    Publication date: March 29, 2018
    Inventors: Ioannis Pefkianakis, Sanjib Sur
  • Patent number: 9853701
    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.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: December 26, 2017
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Ioannis Pefkianakis