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: 11967770Abstract: 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: GrantFiled: January 21, 2022Date of Patent: April 23, 2024Inventors: Ioannis Pefkianakis, Guillaume Monghal, Kshitij Joshi, Mohan Rao Thota, Prashant H. Vashi, Zhenglian Cai
-
Publication number: 20240098654Abstract: 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: ApplicationFiled: September 15, 2022Publication date: March 21, 2024Inventors: Lorenzo BERTIZZOLO, Prashant H. VASHI, Ioannis PEFKIANAKIS
-
Patent number: 11895532Abstract: 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: GrantFiled: January 3, 2022Date of Patent: February 6, 2024Assignee: 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: 20240022926Abstract: 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: ApplicationFiled: July 24, 2023Publication date: January 18, 2024Inventors: 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: 20230412291Abstract: 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: ApplicationFiled: August 22, 2023Publication date: December 21, 2023Inventors: Ioannis Pefkianakis, Weiping Dou, David B. Cheung, Ye Sun, Faraz Faheem
-
Publication number: 20230337151Abstract: 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: ApplicationFiled: April 14, 2022Publication date: October 19, 2023Inventors: Lorenzo Bertizzolo, Ioannis Pefkianakis, Prashant H. Vashi
-
Patent number: 11770198Abstract: 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: GrantFiled: September 6, 2019Date of Patent: September 26, 2023Assignee: Apple Inc.Inventors: Ioannis Pefkianakis, Weiping Dou, David B. Cheung, Ye Sun, Faraz Faheem
-
Patent number: 11758420Abstract: 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: GrantFiled: August 16, 2022Date of Patent: September 12, 2023Assignee: 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: 20230268668Abstract: 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: ApplicationFiled: January 21, 2022Publication date: August 24, 2023Inventors: Ioannis Pefkianakis, Guillaume Monghal, Kshitij Joshi, Mohan Rao Thota, Prashant H. Vashi, Zhenglian Cai
-
Patent number: 11678271Abstract: 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: GrantFiled: July 21, 2014Date of Patent: June 13, 2023Assignee: INTERDIGITAL CE PATENT HOLDINGSInventors: Ioannis Pefkianakis, Jaideep Chandrashekar, Henrik Lundgren
-
Publication number: 20230178899Abstract: 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: ApplicationFiled: December 3, 2021Publication date: June 8, 2023Inventors: Zhenglian Cai, Harish Rajagopalan, Panagiotis Theofanopoulos, Ioannis Pefkianakis, Prashant H. Vashi, Guillaume Monghal, Jennifer M. Edwards
-
Publication number: 20230086297Abstract: 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: ApplicationFiled: September 16, 2022Publication date: March 23, 2023Inventors: Prashant H. Vashi, Muthukumaran Dhanapal, Zhenglian Cai, Ioannis Pefkianakis
-
Patent number: 11611943Abstract: A user equipment (UE) determines a transmission power for data transmission to a network. The UE determines a specific absorption rate (SAR) limit associated with the UE and determines a transmission power to be allocated to data transmissions based on one or more applications running on the UE and the SAR limit.Type: GrantFiled: April 8, 2021Date of Patent: March 21, 2023Assignee: Apple Inc.Inventors: Prashant H. Vashi, Ioannis Pefkianakis, Madhusudan Chaudhary, Rajesh Ambati, Thanigaivelu Elangovan
-
Publication number: 20230044590Abstract: This application describes systems and processes for sensor-assisted antenna and beam selection for wireless networks. The systems and processes are configured to detect out of coverage (OoC) scenarios and perform beam management in response to detecting the OoC scenario. The systems and methods are configured to perform beam management during baseband interruption scenarios. In each scenario, the device (e.g., user equipment UE) is configured to determine whether the UE is static or mobile.Type: ApplicationFiled: June 24, 2022Publication date: February 9, 2023Inventors: Ioannis Pefkianakis, Zhenglian Cai, Prashant H. Vashi, Guillaume Monghal
-
Publication number: 20230035996Abstract: This application describes systems and processes for beam selection performance refinement in static conditions of wireless devices (e.g., user equipment UE). A data processing system of the UE is configured to perform a beam scan for testing multiple high gain candidate beams on a physical downlink shared channel (PDSCH) and link adaptation (LA) channel state information reference signal (LA-CSI-RS) while the UE is not moving and the data processing system of the UE determines that the channel is stable. The data processing system is configured to refine a given beam choice based on a determined capacity of the beams (e.g., from PDSCH signaling and/or LA-CSI-RS signals) to optimize data throughput.Type: ApplicationFiled: June 24, 2022Publication date: February 2, 2023Inventors: Ioannis Pefkianakis, Zhenglian Cai, Guillaume Monghal, Prashant H. Vashi
-
Patent number: 11558758Abstract: 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: GrantFiled: November 19, 2020Date of Patent: January 17, 2023Assignee: 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: 20220394513Abstract: 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: ApplicationFiled: August 16, 2022Publication date: December 8, 2022Inventors: 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: 20220330171Abstract: A user equipment (UE) determines a transmission power for data transmission to a network. The UE determines a specific absorption rate (SAR) limit associated with the UE and determines a transmission power to be allocated to data transmissions based on one or more applications running on the UE and the SAR limit.Type: ApplicationFiled: April 8, 2021Publication date: October 13, 2022Inventors: Prashant H. VASHI, Ioannis PEFKIANAKIS, Madhusudan CHAUDHARY, Rajesh AMBATI, Thanigaivelu ELANGOVAN
-
Publication number: 20220295343Abstract: Systems and methods performed by user equipment (UE) for communicating over a wireless communication network include receiving data representing one or more communication quality metrics for communication on a New Radio (NR) communication link of the wireless communication network. The method includes determining, based on the data representing the one or more communication quality metrics, a data throughput for the NR communication link of the wireless communication network. The method includes estimating a theoretical throughput for using a Long Term Evolution (LTE) communications link of the wireless network. The method includes comparing the data throughput using the NR communication link to the theoretical throughput for using the LTE communication link. The method includes causing a switch, based on the comparison, from the NR communication link to the LTE communication link.Type: ApplicationFiled: March 9, 2022Publication date: September 15, 2022Inventors: Ioannis Pefkianakis, Muthukumaran Dhanapal, Rajesh Ambati, Lakshmi N. Kavuri, Thanigaivelu Elangovan, Ajay Singh, Dinesh Kumar Arora, Raghuveer Mallikarjunan, Gaurav Pathak, Palash Chaturvedi, Narayanan Subramanian, Sergey Sitnikov, Abhishek Walia, Ajoy K. Singh, Oleg M. Moskalenko, Sachin J. Sane, Avinash Viswanathan, Bhumika N. Makwana
-
Patent number: 11432313Abstract: 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: GrantFiled: May 29, 2020Date of Patent: August 30, 2022Assignee: 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