Patents by Inventor Arun Raghupathy

Arun Raghupathy 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: 12289131
    Abstract: Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.
    Type: Grant
    Filed: May 26, 2023
    Date of Patent: April 29, 2025
    Assignee: NextNav, LLC
    Inventors: Arun Raghupathy, Ganesh Pattabiraman, Subramanian S. Meiyappan, Hari Sankar
  • Patent number: 12270967
    Abstract: Field calibration of a pressure device involves collecting simultaneous pressure data or pressure and temperature data at two devices for multiple time points. Pressure differences between pairs of simultaneous data points of the collected pressure data are calculated. A model is fitted to the pressure differences and the temperatures and/or pressures, and model parameters are used to correct measurements from the second device. Alternatively, a pressure gradient is estimated for a region that encompasses the two devices for each time point. A distance is determined between the two devices. A pressure gradient difference is determined between the two devices for each time point. A pressure difference offset is obtained for one of the pairs of simultaneous data points for each time point. An average pressure difference offset is determined between the two devices and is used to correct measurements from one of the devices.
    Type: Grant
    Filed: November 7, 2022
    Date of Patent: April 8, 2025
    Assignee: NextNav, LLC
    Inventors: Michael Dormody, Guiyuan Han, Badrinath Nagarajan, Wei Liu, Prashant Dave, Arun Raghupathy
  • Patent number: 12209924
    Abstract: Multiple calibration results for calibrating a barometric pressure sensor based on data received from a device containing the sensor are determined and stored in a table. The table is updated based on rules regarding a relationship between each calibration result and a current calibration value. The calibration results are weighted and combined to determine a combined calibration result. The calibration value for calibrating the sensor is selected from the calibration results, the combined calibration results, or the current calibration value based on a selection criteria.
    Type: Grant
    Filed: October 26, 2023
    Date of Patent: January 28, 2025
    Assignee: NextNav, LLC
    Inventors: Michael Dormody, Guiyuan Han, Badrinath Nagarajan, Arun Raghupathy
  • Patent number: 12130968
    Abstract: Determining contexts of mobile devices. Particular embodiments described herein include machines that determine two estimated positions of a mobile device that respectively correspond to first and second locations at first and second times, acquire sets of terrain or structural information for first and second areas that respectively include the first and second estimated positions, use the acquired sets of information and the estimated positions to determine if the mobile device was near or within a structure at the first and second times, determine one or more values that are indicative of vertical movement by the mobile device during a period of time between the first time and the second time, compare the one or more values to one or more threshold conditions, and determine a context of the mobile device based on the comparison.
    Type: Grant
    Filed: April 20, 2023
    Date of Patent: October 29, 2024
    Assignee: NextNav, LLC
    Inventors: Michael Dormody, Arun Raghupathy, Badrinath Nagarajan, Guiyuan Han
  • Publication number: 20240357230
    Abstract: A method including, at a camera, detecting motion in a field of view of the camera using a motion sensor, initiating processing of video data corresponding to the field of view in which the motion was detected, ceasing the processing after a first time duration, and determining a cool-off period for the motion sensor, the cool-off period having a second time duration based on the first time duration during which the camera does not detect motion using the motion sensor.
    Type: Application
    Filed: June 28, 2024
    Publication date: October 24, 2024
    Applicant: Google LLC
    Inventors: Dietrich Ho, Aditya Ghadiali, Arun Raghupathy
  • Publication number: 20240353361
    Abstract: A battery pack includes a battery, a first temperature sensor configured to provide a first temperature value associated with a temperature of the battery, a heat source disposed proximate to the battery and configured to heat the battery, a second temperature sensor configured to provide a second temperature value associated with a temperature of the heat source, and a control board coupled to the first temperature sensor and the second temperature sensor, wherein the control board is configured to receive the first temperature value and the second temperature value. The control board is configured to compare the first temperature value and the second temperature value to determine a temperature gradient between the battery and the heat source and transmit an alert if the temperature gradient exceeds a first temperature gradient threshold.
    Type: Application
    Filed: June 28, 2024
    Publication date: October 24, 2024
    Applicant: Google LLC
    Inventors: David Wang, Arun Raghupathy, James Robert Lim, Ihab A. Ali, Chang Hong Ye
  • Patent number: 12101689
    Abstract: A method involves determining, at a mobile device or a service, an uncertainty in height above a reference altitude, an estimated 2D position of the mobile device, and an uncertainty in terrain height above the reference altitude using the estimated 2D position. An uncertainty in height above terrain, of the mobile device, is determined at the mobile device or a server using the uncertainty in height above the reference altitude and the uncertainty in terrain height above the reference altitude.
    Type: Grant
    Filed: July 29, 2022
    Date of Patent: September 24, 2024
    Assignee: NextNav, LLC
    Inventors: Michael Dormody, Badrinath Nagarajan, Guiyuan Han, Arun Raghupathy
  • Patent number: 12061096
    Abstract: A wholistic activity context is used to determine whether to calibrate a barometric pressure sensor of a mobile device. A pair of activity transitions are determined from three activities of the mobile device. A time relationship and a position relationship between the activity transitions is determined. An opportunity to calibrate the barometric pressure sensor occurs between the activity transitions. A calibration of the barometric pressure sensor is performed in response to determining that the time relationship and the position relationship indicate that the wholistic activity context surrounding the opportunity to calibrate the barometric pressure sensor is conducive to calibration.
    Type: Grant
    Filed: July 23, 2021
    Date of Patent: August 13, 2024
    Assignee: NextNav, LLC
    Inventors: Michael Dormody, Badrinath Nagarajan, Arun Raghupathy, Guiyuan Han
  • Patent number: 12050190
    Abstract: A battery pack includes a battery, a first temperature sensor configured to provide a first temperature value associated with a temperature of the battery, a heat source disposed proximate to the battery and configured to heat the battery, a second temperature sensor configured to provide a second temperature value associated with a temperature of the heat source, and a control board coupled to the first temperature sensor and the second temperature sensor, wherein the control board is configured to receive the first temperature value and the second temperature value. The control board is configured to compare the first temperature value and the second temperature value to determine a temperature gradient between the battery and the heat source and transmit an alert if the temperature gradient exceeds a first temperature gradient threshold.
    Type: Grant
    Filed: May 4, 2023
    Date of Patent: July 30, 2024
    Assignee: Google LLC
    Inventors: David Wang, Arun Raghupathy, James Robert Lim, Ihab A. Ali, Chang Hong Ye
  • Patent number: 12038280
    Abstract: Calibrating a pressure sensor of a mobile device includes determining a first plurality of calibration values for a first plurality of visits to a first revisit zone to which a mobile device repeatedly returns; determining a first relative calibration adjustment value based on the first plurality of calibration values; determining an adjusted absolute calibration value based on i) an absolute calibration value used to calibrate pressure measurements made by a pressure sensor of the mobile device, and ii) the first relative calibration adjustment value; and calibrating pressure measurements made by the pressure sensor of the mobile device using the adjusted absolute calibration value.
    Type: Grant
    Filed: August 1, 2023
    Date of Patent: July 16, 2024
    Assignee: NextNav, LLC
    Inventors: Michael Dormody, Deepak Joseph, Badrinath Nagarajan, Guiyuan Han, Arun Raghupathy
  • Publication number: 20240168068
    Abstract: A smart-home device may include a main power rail that provides power to components of the smart-home device; an integrator coupled to the main power rail that stores energy on an energy-storage device, where the energy stored on the energy-storage device is representative of an amount an amount of power provided to the smart-home device through the main power rail during an integration cycle of the integrator; and a counter that stores a number of integration cycles performed by the integrator during a time interval, where a total amount of power provided to the smart-home device through the main power rail during the time interval is represented by: (1) the number of integration cycles performed by the integrator during the time interval; and (2) the energy stored on the energy-storage device.
    Type: Application
    Filed: January 30, 2024
    Publication date: May 23, 2024
    Applicant: Google LLC
    Inventors: Daniel Adam Warren, Michael Mitchell, Gwendolyn van der Linden, Ford Rylander, Brian Silverstein, Arun Raghupathy
  • Patent number: 11991605
    Abstract: Using a pressure sensor of a mobile device to improve the accuracy of determined contexts. Particular embodiments described herein include machines that determine a context of a mobile device, and determine if the determined context is accurate using multiple measurements of pressure from a pressure sensor of the mobile device.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: May 21, 2024
    Assignee: NextNav, LLC
    Inventors: Michael Dormody, Arun Raghupathy, Badrinath Nagarajan, Guiyuan Han
  • Patent number: 11985569
    Abstract: A method to identify a problematic 2D position of a mobile device can include: determining a reported 2D position of the mobile device; determining a piece of information about the mobile device; and comparing the reported 2D position and the piece of information about the mobile device. Upon determining that the reported 2D position and the piece of information about the mobile device are consistent with each other, the reported 2D position of the mobile device is used as an estimate of the actual 2D position of the mobile device, or upon determining that the reported 2D position and the piece of information about the mobile device are not consistent with each other, the reported 2D position is determined to be problematic, and the reported 2D position of the mobile device is removed from a list of reported 2D positions of the mobile device.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: May 14, 2024
    Assignee: NextNav, LLC
    Inventors: Guiyuan Han, Michael Dormody, Badrinath Nagarajan, Arun Raghupathy
  • Patent number: 11885838
    Abstract: A smart-home device may include a main power rail that provides power to components of the smart-home device; an integrator coupled to the main power rail that stores energy on an energy-storage device, where the energy stored on the energy-storage device is representative of an amount an amount of power provided to the smart-home device through the main power rail during an integration cycle of the integrator; and a counter that stores a number of integration cycles performed by the integrator during a time interval, where a total amount of power provided to the smart-home device through the main power rail during the time interval is represented by: (1) the number of integration cycles performed by the integrator during the time interval; and (2) the energy stored on the energy-storage device.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: January 30, 2024
    Assignee: Google LLC
    Inventors: Daniel Adam Warren, Michael Mitchell, Gwendolyn van der Linden, Ford Rylander, Brian Silverstein, Arun Raghupathy
  • Patent number: 11841285
    Abstract: Multiple calibration results for calibrating a barometric pressure sensor based on data received from a device containing the sensor are determined and stored in a table. The table is updated based on rules regarding a relationship between each calibration result and a current calibration value. The calibration results are weighted and combined to determine a combined calibration result. The calibration value for calibrating the sensor is selected from the calibration results, the combined calibration results, or the current calibration value based on a selection criteria.
    Type: Grant
    Filed: January 20, 2023
    Date of Patent: December 12, 2023
    Assignee: NextNav, LLC
    Inventors: Michael Dormody, Guiyuan Han, Badrinath Nagarajan, Arun Raghupathy
  • Publication number: 20230304951
    Abstract: A battery pack includes a battery, a first temperature sensor configured to provide a first temperature value associated with a temperature of the battery, a heat source disposed proximate to the battery and configured to heat the battery, a second temperature sensor configured to provide a second temperature value associated with a temperature of the heat source, and a control board coupled to the first temperature sensor and the second temperature sensor, wherein the control board is configured to receive the first temperature value and the second temperature value. The control board is configured to compare the first temperature value and the second temperature value to determine a temperature gradient between the battery and the heat source and transmit an alert if the temperature gradient exceeds a first temperature gradient threshold.
    Type: Application
    Filed: May 4, 2023
    Publication date: September 28, 2023
    Applicant: Google LLC
    Inventors: David Wang, Arun Raghupathy, James Robert Lim, Ihab A. Ali, Chang Hong Ye
  • Patent number: 11761823
    Abstract: A smart-home device may include a housing, a printed circuit board (PCB) inside the housing, an environmental sensor mounted to the PCB inside the housing, and a gasket that encloses the environmental sensor inside the housing to isolate the environmental sensor from an atmosphere inside of the housing while allowing an atmosphere outside of the housing to enter the gasket such that the environmental sensor can measure an aspect of the atmosphere outside of the housing.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: September 19, 2023
    Assignee: Google LLC
    Inventors: Michael Mitchell, Arun Raghupathy, William Dong, Adrian Shanov
  • Patent number: 11761765
    Abstract: Calibrating a pressure sensor of a mobile device incudes determining an absolute calibration value used to calibrate pressure measurements by a pressure sensor of a mobile device; determining a first revisit zone as a first location to which the mobile device repeatedly returns; determining first and second calibrations for first and second visits to the first revisit zone; determining a first relative calibration adjustment value based on a difference between the first and second calibrations; determining an adjusted absolute calibration value based on a sum of the absolute calibration value and the first relative calibration adjustment value; and estimating an altitude of the mobile device based on a pressure measurement by the pressure sensor and the adjusted absolute calibration value.
    Type: Grant
    Filed: January 12, 2022
    Date of Patent: September 19, 2023
    Assignee: NextNav, LLC
    Inventors: Michael Dormody, Deepak Joseph, Badrinath Nagarajan, Guiyuan Han, Arun Raghupathy
  • Patent number: 11733038
    Abstract: Methods and machines involve detecting when a mobile device is in a first area and a second area at different times, collecting pressure data from the mobile device and reference sensor(s) to estimate altitudes of the mobile device within the first area and the second area, collecting terrain altitudes associated with the first area and the second area, and using a difference between the estimated altitudes and a difference between the terrain altitudes to determine a height of a floor. The estimated floor height may be used to calibrate a pressure sensor of a mobile device.
    Type: Grant
    Filed: January 3, 2022
    Date of Patent: August 22, 2023
    Assignee: NextNav, LLC
    Inventors: Badrinath Nagarajan, Arun Raghupathy, Michael Dormody, Guiyuan Han
  • Patent number: 11726507
    Abstract: A smart-home device may include a temperature sensor, energy-consuming subsystems, and processors programmed to receive a temperature measurement from the temperature sensor for an ambient environment surrounding the temperature sensor; receive inputs from the energy-consuming subsystems that indicate power-consuming activities of the energy-consuming subsystems; providing the inputs from the energy-consuming subsystems to a model that is trained to calculate an effect of the power-consuming activity of the energy-consuming subsystems on the temperature measurement from the temperature sensor; and calculating an estimate of the temperature of the ambient environment by compensating the temperature measurement from the temperature sensor with using the effect of the power-consuming activity of the energy-consuming subsystems.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: August 15, 2023
    Assignee: Google LLC
    Inventors: Daniel Adam Warren, Michael Mitchell, Gwendolyn van der Linden, Ford Rylander, Brian Silverstein, Arun Raghupathy