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).

  • Patent number: 11432313
    Abstract: A system and method for operation of a user equipment (UE) to determine a cellular network bottleneck in a downlink channel, and an apparatus for use in a UE for determining the same. A UE may determine a burst of network traffic from network traffic received from the cellular network during a series of transmission time intervals. The UE may analyze resource allocations to the UE during the burst to determine an extent to which the cellular network is busy. The UE may determine that the cellular network is experiencing a bottleneck based at least in part on the analysis of the resource allocations to the UE in the burst.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: August 30, 2022
    Assignee: Apple Inc.
    Inventors: Ioannis Pefkianakis, Madhusudan Chaudhary, Swaminathan Balakrishnan, Muthukumaran Dhanapal, Lakshmi Kavuri, Thanigaivelu Elangovan, Ajoy K. Singh, Deepankar Bhattacharjee, Gaurav Pathak, Carola Faronius, Franco Travostino, Raghuveer Mallikarjun, Harshit Chuttani, Sreevalsan Vallath, Rajesh Ambati
  • Publication number: 20220225118
    Abstract: A wireless device is configured to select a beam and/or an antenna based on detection a detected position and/or orientation of the device relative to a remote device. The device obtains motion data indicating a change in position or orientation of the wireless device. The device determines its pose relative to the remote device. The device accesses a coverage map that associates, for each potential pose for the device with respect to the remote device: an antenna for communicating with the remote device and/or a beam for communicating with the remote device. The device selects a particular antenna and/or a particular beam for communicating with the remote device; and causes transmission or reception of data to or from the remote device by the particular antenna and/or the particular beam.
    Type: Application
    Filed: January 10, 2022
    Publication date: July 14, 2022
    Inventors: Ioannis Pefkianakis, Madhusudan Chaudhary, Chia-Feng Lin, Satish Doraiswamy, Prashant H. Vashi, Sai Sravan Bharadwaj Karri, Guillaume Monghal
  • Publication number: 20220217577
    Abstract: A user equipment (UE) passively determines the presence of a cellular network bottleneck in a downlink channel and may take appropriate actions to mitigate the bottleneck. The UE may analyze the transport block size (TBS) of slots of received downlink traffic and assign states the to various slots based on this analysis. Based on these assigned states, the UE may identify a burst of network traffic from network traffic received from the cellular network, and the UE may also determine the burst duration as well as a busy estimation. The UE may determine that the cellular network is experiencing a bottleneck based at least in part on the burst duration and the busy estimation.
    Type: Application
    Filed: January 3, 2022
    Publication date: July 7, 2022
    Inventors: Ioannis Pefkianakis, Madhusudan Chaudhary, Muthukumaran Dhanapal, Lakshmi N. Kavuri, Thanigaivelu Elangovan, Ajay Singh, Deepankar Bhattacharjee, Gaurav Pathak, Carola Faronius, Franco Travostino, Raghuveer Mallikarjunan, Harshit Chuttani, Sreevalsan Vallath, Rajesh Ambati, Jia Tang, Ishwinder Singh
  • Patent number: 11202297
    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.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: December 14, 2021
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Christina Vlachou, Ioannis Pefkianakis, Kyu-Han Kim
  • Publication number: 20210377983
    Abstract: A system and method for operation of a user equipment (UE) to determine a cellular network bottleneck in a downlink channel, and an apparatus for use in a UE for determining the same. A UE may determine a burst of network traffic from network traffic received from the cellular network during a series of transmission time intervals. The UE may analyze resource allocations to the UE during the burst to determine an extent to which the cellular network is busy. The UE may determine that the cellular network is experiencing a bottleneck based at least in part on the analysis of the resource allocations to the UE in the burst.
    Type: Application
    Filed: May 29, 2020
    Publication date: December 2, 2021
    Inventors: Ioannis Pefkianakis, Madhusudan Chaudhary, Swaminathan Balakrishnan, Muthukumaran Dhanapal, Lakshmi Kavuri, Thanigaivelu Elangovan, Ajoy K. Singh, Deepankar Bhattacharjee, Gaurav Pathak, Carola Faronius, Franco Travostino, Raghuveer Mallikarjun, Harshit Chuttani, Sreevalsan Vallath, Rajesh Ambati
  • Publication number: 20210282127
    Abstract: Embodiments described herein relate to managing access to 5G cellular baseband resources for 5G-capable wireless devices. A wireless device can monitor application workloads by analyzing communication network performance requirements for a given application in-use or launching for future use along with system-level indications of overall device usage, battery level, and mobility status to determine whether access to 5G cellular baseband resources is recommended for an application. A 5G cellular baseband resource recommendation is provided for an application indicating a level of bandwidth in current use or expected for future use as well as a confidence metric in the bandwidth level indication. The 5G cellular baseband resource recommendation is used with additional device criteria to determine whether access to one or more 5G radio frequency bands is allowed.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 9, 2021
    Inventors: Madhusudan CHAUDHARY, Arun G. MATHIAS, Rajesh AMBATI, Ajay SINGH, Franco TRAVOSTINO, Muthukumaran DHANAPAL, Lakshmi N. KAVURI, Ajoy K. SINGH, Thanigaivelu ELANGOVAN, Ioannis PEFKIANAKIS, Raghuveer MALLIKARJUNAN, Faraz FAHEEM, Geoffrey R. HALL, Harshit CHUTTANI, Rohan C. MALTHANKAR, Prashant H. VASHI, Hisham A. MAHMOUD, Henri S. BERGER, Divyaprakash P. BHOJKUMAR
  • Patent number: 11035946
    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.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: June 15, 2021
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Ioannis Pefkianakis, Kyu-Han Kim
  • Patent number: 10972155
    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: Grant
    Filed: November 25, 2015
    Date of Patent: April 6, 2021
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Ioannis Pefkianakis, Sanjib Sur, Yunze Zeng
  • Publication number: 20210075526
    Abstract: A wireless device can perform non-line-of-sight detection. The wireless device may establish a wireless link with another wireless device using a wireless channel. The wireless device may perform one or more channel measurements for the wireless channel. The wireless device may determine whether a line-of-sight path is available for the wireless channel based at least in part on the one or more channel measurements. The wireless device may determine whether to trigger beamforming selection, antenna selection, and/or any other link maintenance operations based at least in part on the determined line-of-sight availability.
    Type: Application
    Filed: September 6, 2019
    Publication date: March 11, 2021
    Inventors: Ioannis Pefkianakis, Weiping Dou, David B. Cheung, Ye Sun, Faraz Faheem
  • Patent number: 10887819
    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.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: January 5, 2021
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Ioannis Pefkianakis
  • Patent number: 10820242
    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: Grant
    Filed: August 31, 2017
    Date of Patent: October 27, 2020
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Ioannis Pefkianakis, Sanjib Sur
  • Patent number: 10779173
    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: Grant
    Filed: January 30, 2018
    Date of Patent: September 15, 2020
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Ioannis Pefkianakis
  • Patent number: 10708154
    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: Grant
    Filed: August 27, 2015
    Date of Patent: July 7, 2020
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Ioannis Pefkianakis, Abhinav Parate, Shruti Sanadhya
  • Publication number: 20200107214
    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.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 2, 2020
    Inventors: Christina Vlachou, Ioannis Pefkianakis
  • Publication number: 20200088869
    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.
    Type: Application
    Filed: September 18, 2018
    Publication date: March 19, 2020
    Inventors: Ioannis Pefkianakis, Kyu-Han Kim
  • Patent number: 10587353
    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: Grant
    Filed: February 19, 2016
    Date of Patent: March 10, 2020
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Sanjib Sur, Ioannis Pefkianakis, Souvik Sen
  • Patent number: 10548147
    Abstract: Example system may comprise a network controller including a processing resource and instructions executable by the processing resource to: receive, from a first access point in a network, properties of a first millimeter Wave (mmWave) signal path between the first access point and a computing device associated with the first access point; predict, utilizing the properties of the first mmWave signal path, properties of a second mmWave signal path between a second access point in the network and the computing device; predict, utilizing the predicted properties of the second mmWave path, a beam strength for the second access point; and assign a rank to the second access point according to the beam strength.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: January 28, 2020
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Ioannis Pefkianakis, Sanjib Sur
  • Patent number: 10505619
    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: Grant
    Filed: January 31, 2018
    Date of Patent: December 10, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Ioannis Pefkianakis, Sanjib Sur
  • Publication number: 20190335377
    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.
    Type: Application
    Filed: April 25, 2018
    Publication date: October 31, 2019
    Inventor: Ioannis Pefkianakis
  • Publication number: 20190239235
    Abstract: Example system may comprise a network controller including a processing resource and instructions executable by the processing resource to: receive, from a first access point in a network, properties of a first millimeter Wave (mmWave) signal path between the first access point and a computing device associated with the first access point; predict, utilizing the properties of the first mmWave signal path, properties of a second mmWave signal path between a second access point in the network and the computing device; predict, utilizing the predicted properties of the second mmWave path, a beam strength for the second access point; and assign a rank to the second access point according to the beam strength.
    Type: Application
    Filed: January 31, 2018
    Publication date: August 1, 2019
    Inventors: Ioannis Pefkianakis, Sanjib Sur