Patents Assigned to SR Technologies, Inc.
  • Patent number: 9924527
    Abstract: A monitoring station and method for increasing a frequency of wireless packet reception. The monitoring station includes a physical layer (PHY) having a plurality of radio frequency (RF) receivers, processing circuitry comprising a processor, and a memory storing instructions that, when executed, configure the processor to control timing offsets of each of the plurality of RF receivers such that each of the plurality of RF receivers has a different timing offset with respect to each other. The monitoring station includes an RF signal router configured to receive an incoming RF signal and route the RF signal to the plurality of RF receivers, and vary at least one of signal gain and signal loss for the incoming RF signal across each of the plurality of RF receivers such that each of the plurality of RF receivers has a different effective noise figure with respect to each other.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: March 20, 2018
    Assignee: SR Technologies, Inc.
    Inventor: Conrad C. Smith
  • Patent number: 9921294
    Abstract: A passive geo-location scheme of Wi-Fi access points is described using one or more mobile measuring stations. The methods and arrangements herein relate to, in one embodiment, using the TSF timer in beacons received by the measuring station, the reported TODs, the TOAs measured by the measuring station and synchronization between the timers of the wireless device and the measuring station. The synchronization includes applying a factor ? for correcting the timer associated with the measuring station when the measuring station receives the beacons, applying a factor ? for correcting a ratio of timer rates between the timer associated with the wireless device and the timer associated with the measuring station, and applying a factor ? for correcting changes in a timer rate ratio between the first timer associated with the wireless device and the timer associated with the measuring station.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: March 20, 2018
    Assignee: SR Technologies, Inc.
    Inventor: Mark Passler
  • Patent number: 9877149
    Abstract: An assisted passive geo-location method and system for determining the location of a wireless device. The method includes passive location techniques in order to assist in determining the location of the wireless device and active techniques in order to assist in the calculation of the relative drift between the clock associated with the wireless device and the clock associated with the measuring station.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: January 23, 2018
    Assignee: SR Technologies, Inc.
    Inventor: Mark Passler
  • Patent number: 9838956
    Abstract: A method and a node identification system for identifying at least one unknown mobile node in a communications network using details related to at least one known mobile node and organization of the details related to the at least one known mobile node. The method includes capturing details related to the at least one unknown mobile node and identifying an organization of the captured details related to the at least one unknown mobile node, comparing the details related to the at least one known mobile node and the organization of the details related to the at least one known mobile node with the captured details related to the at least one unknown mobile node and the organization of the captured details related to the at least one unknown mobile node, and determining a type of the at least one unknown mobile node based on the comparing.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: December 5, 2017
    Assignee: SR Technologies, Inc.
    Inventor: Graham K. Smith
  • Patent number: 9693187
    Abstract: A passive geo-location method for determining the location of a wireless device. The method includes receiving, by a measuring receiver at a first position, a first beacon transmitted to the measuring receiver by the wireless device, and receiving, by the measuring receiver at a second position, a second beacon transmitted to the measuring receiver by the wireless device. When the first position differs from the second position by less than a predetermined distance, the method further includes determining a relative drift between a clock associated with the wireless device and a clock associated with the measuring receiver, and determining a location of the wireless device based at least on the determined relative drift.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: June 27, 2017
    Assignee: SR TECHNOLOGIES, INC.
    Inventor: Mark Passler
  • Patent number: 7279863
    Abstract: Disclosed is a method and apparatus for detecting an excitation position of an SRM by comparison of detected currents. The method includes detecting a current by applying a first test voltage to each phase of the SRM, detecting a current by applying a second test voltage to each phase, determining an operation state of the SRM based on a deviation between the currents detected in any one of the phases, determining the operation state of the SRM as a rotation state if the deviation value exceeds a predetermined value, and applying a third test voltage to a phase excited just prior to a current excited phase to detect the current and turning on a phase to be next excited if the detected current value is more than a first reference value, and turning off the phase excited just prior to the presently excited phase if the detected current value is more than a second reference value. The phase excitation position is accurately detected according to the rotating speed without using a position sensor.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: October 9, 2007
    Assignee: SR Technologies, Inc.
    Inventors: Jin-Woo Ahn, Dong-Hee Lee, Tae-Hyoung Kim