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: 12207283
    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: Grant
    Filed: May 20, 2024
    Date of Patent: January 21, 2025
    Assignee: Apple Inc.
    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: 12185123
    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: Grant
    Filed: January 10, 2022
    Date of Patent: December 31, 2024
    Assignee: Apple Inc.
    Inventors: Ioannis Pefkianakis, Madhusudan Chaudhary, Chia-Feng Lin, Satish Doraiswamy, Prashant H. Vashi, Sai Sravan Bharadwaj Karri, Guillaume Monghal
  • Publication number: 20240396817
    Abstract: The described embodiments regard latency estimation by a wireless device for a cellular wireless access link. The wireless device determines maximum grant allocations (e.g., maximum transport block size values) for time slots based on channel conditions, monitors grant allocations to the wireless device, and classifies time slots having non-zero grant allocations based on a comparison of the grant allocations to the maximum possible grants to determine traffic bursts. The wireless device measures time periods of time slots with zero grant allocations within traffic bursts to estimate latency values for traffic bursts. The wireless device statistically processes the latency values to generate a composite (e.g., weighted moving average) latency value to compare with a threshold to determine whether to initiate latency mitigation actions.
    Type: Application
    Filed: May 26, 2023
    Publication date: November 28, 2024
    Inventor: Ioannis PEFKIANAKIS
  • Publication number: 20240373364
    Abstract: The present invention generally relates to a management of a wireless interface of a device. The management of the wireless interface includes monitoring of at least one component of the device, other than a wireless network element followed by switching a power state of the wireless interface to another power state according to the monitored activity.
    Type: Application
    Filed: July 17, 2024
    Publication date: November 7, 2024
    Inventors: IOANNIS PEFKIANAKIS, Jaideep Chandrashekar, Henrik Lundgren
  • Publication number: 20240306176
    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: May 20, 2024
    Publication date: September 12, 2024
    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: 12069577
    Abstract: The present invention generally relates to a management of a wireless interface of a device; the management comprises: monitoring of at least one component of the device, other than a wireless network element; switch a power state of the wireless interface to another power state according to the monitored activity.
    Type: Grant
    Filed: May 15, 2023
    Date of Patent: August 20, 2024
    Assignee: InterDigital CE Patent Holdings, SAS
    Inventors: Ioannis Pefkianakis, Jaideep Chandrashekar, Henrik Lundgren
  • Patent number: 12022493
    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: Grant
    Filed: March 1, 2021
    Date of Patent: June 25, 2024
    Assignee: Apple Inc.
    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: 11990682
    Abstract: An electronic device may be provided with first and second sidewalls, a rear wall, and a display. Multiple antenna panels may be used to convey radio-frequency signals at frequencies greater than 10 GHz. A first antenna panel may radiate through the display while second and third panels radiate through the first and second sidewalls. The second and third panels may be tilted at non-zero angles with respect to the sidewalls. The non-zero angles may be of opposite sign. The non-zero angles may have the same magnitude. The magnitude may be equal to 15 degrees, as one example. Tilting the panels in this way may allow the panels to collectively cover as much of a sphere around the device as possible, including out of coverage areas behind the rear wall caused by conductive material in the rear wall, without requiring additional panels to be disposed within the device.
    Type: Grant
    Filed: December 3, 2021
    Date of Patent: May 21, 2024
    Assignee: Apple Inc.
    Inventors: Zhenglian Cai, Harish Rajagopalan, Panagiotis Theofanopoulos, Ioannis Pefkianakis, Prashant H. Vashi, Guillaume Monghal, Jennifer M. Edwards
  • Patent number: 11967770
    Abstract: An electronic device may include wireless circuitry with a phased antenna array that conveys radio-frequency signals using signal beams of first and second orthogonal polarizations. The array may sweep over a set of signal beam pairs, each including a respective combination of signal beams of the first and second polarizations. The wireless circuitry may gather performance metric values for each of the polarizations and signal beam pairs. The circuitry may generate a filtered set of signal beam pairs by removing signal beam pairs having performance metric values that differ from a maximum of the wireless performance metric values by more than a threshold. The circuitry may select a signal beam pair from the filtered set having a minimum polarization imbalance. The array may concurrently convey first and second wireless data streams using the selected signal beam pair. Minimizing polarization imbalance may maximize overall data throughput for the device.
    Type: Grant
    Filed: January 21, 2022
    Date of Patent: April 23, 2024
    Inventors: Ioannis Pefkianakis, Guillaume Monghal, Kshitij Joshi, Mohan Rao Thota, Prashant H. Vashi, Zhenglian Cai
  • Publication number: 20240098654
    Abstract: This application describes methods and apparatus to allocate uplink (UL) power dynamically across multiple parallel radio frequency links for wireless devices. The wireless device sets an initial maximum transmit power level (MTPL) for each UL radio link of multiple radio links used for UL traffic based on a duty cycle prediction for the respective UL radio link. The wireless device adjusts the initial MTPL for each UL radio link based on a predicted data throughput for the UL radio link relative to a total predicted data throughput for all UL radio links. The adjusted MTPL for each UL radio link can be also reduced when the UL radio link uses UL multiple input multiple output (MIMO) transmission via multiple antenna ports, e.g., by apportioning the adjusted MTPL among the multiple antenna ports of the UL radio link equally.
    Type: Application
    Filed: September 15, 2022
    Publication date: March 21, 2024
    Inventors: Lorenzo BERTIZZOLO, Prashant H. VASHI, Ioannis PEFKIANAKIS
  • Patent number: 11895532
    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: Grant
    Filed: January 3, 2022
    Date of Patent: February 6, 2024
    Assignee: Apple Inc.
    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
  • Publication number: 20240022926
    Abstract: This disclosure relates to methods and devices for mitigating overheating in a user equipment device (UE). The UE is configured to communicate over each of LTE and 5G NR and may be configured to communicate through 5G NR over each of a Sub-6 GHz and a millimeter Wave (mmW) frequency band. The UE is configured to establish an ENDC connection with an enB and one or more gNBs. The UE implements intelligent transmission modification and cell measurement adjustments to mitigate overheating and reduce battery drain.
    Type: Application
    Filed: July 24, 2023
    Publication date: January 18, 2024
    Inventors: Alosious Pradeep Prabhakar, Wen Zhao, Lakshmi N. Kavuri, Li Su, Sagar B. Shah, Sriram Subramanian, Vijay Venkataraman, Vishwanth Kamala Govindaraju, Shiva Krishna Nana, Sanjeevi Balasubramanian, Wei Zhang, Madhukar D. Shanbhag, Sandeep K. Sunkesala, Srinivasan Nimmala, Muthukumaran Dhanapal, Tarakkumar G. Dhanani, Sree Ram Kodali, Ioannis Pefkianakis, Dhruv Khati, Franco Travostino, Thanigaivelu Elangovan, Madhusudan Chaudhary, Geoffrey R. Hall
  • Publication number: 20230412291
    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: August 22, 2023
    Publication date: December 21, 2023
    Inventors: Ioannis Pefkianakis, Weiping Dou, David B. Cheung, Ye Sun, Faraz Faheem
  • Publication number: 20230337151
    Abstract: A wireless communication device receives an average transmission power limit for a time period, and determines a first MTPL for a first time of the time period by setting the first MTPL to the average transmission power limit. The wireless communication device then transmits a signal at the first time using a first transmission power not to exceed the first MTPL. If the first transmission power is less than the first MTPL, then the wireless communication device determines residual transmission power based on a difference between the first MTPL and the first transmission power. The wireless communication device determines a second MTPL for a second time of the time period by adding the residual transmission power to the first MTPL. The wireless communication device then transmits a signal at the second transmission power not to exceed the second MTPL.
    Type: Application
    Filed: April 14, 2022
    Publication date: October 19, 2023
    Inventors: Lorenzo Bertizzolo, Ioannis Pefkianakis, Prashant H. Vashi
  • Patent number: 11770198
    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: Grant
    Filed: September 6, 2019
    Date of Patent: September 26, 2023
    Assignee: Apple Inc.
    Inventors: Ioannis Pefkianakis, Weiping Dou, David B. Cheung, Ye Sun, Faraz Faheem
  • Patent number: 11758420
    Abstract: This disclosure relates to methods and devices for mitigating overheating in a user equipment device (UE). The UE is configured to communicate over each of LTE and 5G NR and may be configured to communicate through 5G NR over each of a Sub-6GHz and a millimeter Wave (mmW) frequency band. The UE is configured to establish an ENDC connection with an enB and one or more gNBs. The UE implements intelligent transmission modification and cell measurement adjustments to mitigate overheating and reduce battery drain.
    Type: Grant
    Filed: August 16, 2022
    Date of Patent: September 12, 2023
    Assignee: Apple Inc.
    Inventors: Alosious Pradeep Prabhakar, Wen Zhao, Lakshmi N. Kavuri, Li Su, Sagar B. Shah, Sriram Subramanian, Vijay Venkataraman, Vishwanth Kamala Govindaraju, Shiva Krishna Narra, Sanjeevi Balasubramanian, Wei Zhang, Madhukar K. Shanbhag, Sandeep K. Sunkesala, Srinivasan Nimmala, Muthukumaran Dhanapal, Tarakkumar G. Dhanani, Sree Ram Kodali, Ioannis Pefkianakis, Dhruv Khati, Franco Travostino, Thanigaivelu Elangovan, Madhusudan Chaudhary, Geoffrey R. Hall
  • Publication number: 20230268668
    Abstract: An electronic device may include wireless circuitry with a phased antenna array that conveys radio-frequency signals using signal beams of first and second orthogonal polarizations. The array may sweep over a set of signal beam pairs, each including a respective combination of signal beams of the first and second polarizations. The wireless circuitry may gather performance metric values for each of the polarizations and signal beam pairs. The circuitry may generate a filtered set of signal beam pairs by removing signal beam pairs having performance metric values that differ from a maximum of the wireless performance metric values by more than a threshold. The circuitry may select a signal beam pair from the filtered set having a minimum polarization imbalance. The array may concurrently convey first and second wireless data streams using the selected signal beam pair. Minimizing polarization imbalance may maximize overall data throughput for the device.
    Type: Application
    Filed: January 21, 2022
    Publication date: August 24, 2023
    Inventors: Ioannis Pefkianakis, Guillaume Monghal, Kshitij Joshi, Mohan Rao Thota, Prashant H. Vashi, Zhenglian Cai
  • Patent number: 11678271
    Abstract: The present invention generally relates to a management of a wireless interface of a device. The management of the wireless interface includes monitoring of at least one component of the device, other than a wireless network element followed by switching a power state of the wireless interface to another power state according to the monitored activity.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: June 13, 2023
    Assignee: INTERDIGITAL CE PATENT HOLDINGS
    Inventors: Ioannis Pefkianakis, Jaideep Chandrashekar, Henrik Lundgren
  • Publication number: 20230178899
    Abstract: An electronic device may be provided with first and second sidewalls, a rear wall, and a display. Multiple antenna panels may be used to convey radio-frequency signals at frequencies greater than 10 GHz. A first antenna panel may radiate through the display while second and third panels radiate through the first and second sidewalls. The second and third panels may be tilted at non-zero angles with respect to the sidewalls. The non-zero angles may be of opposite sign. The non-zero angles may have the same magnitude. The magnitude may be equal to 15 degrees, as one example. Tilting the panels in this way may allow the panels to collectively cover as much of a sphere around the device as possible, including out of coverage areas behind the rear wall caused by conductive material in the rear wall, without requiring additional panels to be disposed within the device.
    Type: Application
    Filed: December 3, 2021
    Publication date: June 8, 2023
    Inventors: Zhenglian Cai, Harish Rajagopalan, Panagiotis Theofanopoulos, Ioannis Pefkianakis, Prashant H. Vashi, Guillaume Monghal, Jennifer M. Edwards
  • Publication number: 20230086297
    Abstract: In an example method, a first device determines first network resources that have been activated for exchanging data with one or more second devices via a wireless network, and determines, for each of the first network resources, a time duration of a respective burst transmission performed using that first network resource. The first device determines whether to (i) activate second network resources for exchanging data with the second devices and/or (ii) deactivate one or more of the first network resources for exchanging data with the second devices. In response, the first device activates the second network resources and/or deactivates the one or more of the first network resources.
    Type: Application
    Filed: September 16, 2022
    Publication date: March 23, 2023
    Inventors: Prashant H. Vashi, Muthukumaran Dhanapal, Zhenglian Cai, Ioannis Pefkianakis