Patents by Inventor Graham K. SMITH

Graham K. SMITH 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: 11979944
    Abstract: A method in a mobile station (STA) configured to associate to an access point (AP) is described. The method includes determining an identifiable random medium access control (MAC) address (IRMA), associating to the AP and transmitting the IRMA to the AP during the association. The method also includes using the IRMA as the transmitter address (TA) a next time the STA begins to associate to the AP, where the IRMA is usable by the AP to identify the STA prior to a next association, determining a new IRMA, and transmitting the new IRMA to the AP during the next association. One or more additional associations to the AP are performed at least by transmitting at least a corresponding IRMA to the AP and indicating that the corresponding IRMA is a TA of the STA.
    Type: Grant
    Filed: August 8, 2023
    Date of Patent: May 7, 2024
    Assignee: SR Technologies, Inc.
    Inventor: Graham K. Smith
  • Publication number: 20240056799
    Abstract: A method in a mobile station (STA) configured to associate to an access point (AP) is described. The method includes determining an identifiable random medium access control (MAC) address (IRMA), associating to the AP and transmitting the IRMA to the AP during the association. The method also includes using the IRMA as the transmitter address (TA) a next time the STA begins to associate to the AP, where the IRMA is usable by the AP to identify the STA prior to a next association, determining a new IRMA, and transmitting the new IRMA to the AP during the next association. One or more additional associations to the AP are performed at least by transmitting at least a corresponding IRMA to the AP and indicating that the corresponding IRMA is a TA of the STA.
    Type: Application
    Filed: August 8, 2023
    Publication date: February 15, 2024
    Inventor: Graham K. SMITH
  • Patent number: 11882093
    Abstract: A method, apparatus, and system are described. A method in an access point (AP) configured for medium access control (MAC) address designation (MAAD) is described. The AP is configured to wirelessly communicate with a station (STA). The method comprises determining a first MAC address of the STA, where the first MAC address is usable as a transmitter address (TA) of the STA for a subsequent association to the AP by the STA, and transmitting the first MAC address to the STA in one of a response action frame and a message of a multiple-message handshake process.
    Type: Grant
    Filed: February 1, 2023
    Date of Patent: January 23, 2024
    Assignee: SR Technologies, Inc.
    Inventor: Graham K. Smith
  • Patent number: 11882448
    Abstract: A method implemented in a monitoring station is described. The monitoring station is configurable to monitor a communication between a first wireless device and a second wireless device. The method includes receiving a packet from the first wireless device, the packet being addressed to the second wireless device and determining whether the received packet meets at least one criterion of one packet that is to be blocked. The method further includes transmitting a blocking signal when the received packet meets the at least one criterion of the one packet that is to be blocked. The blocking signal causes an interference with a reception, at the second wireless device, of at least one field of the received packet.
    Type: Grant
    Filed: April 11, 2022
    Date of Patent: January 23, 2024
    Assignee: SR Technologies, Inc.
    Inventors: Ryan Busser, Olivia Turner, Graham K. Smith
  • Patent number: 11876537
    Abstract: A method in a first wireless device (WD) supporting wireless communication with a second WD is described. A plurality of wireless packets is received from the second WD including at least a first wireless packet. At least another wireless packet of the plurality of wireless packets is one of a retry packet and a repeat packet of the first packet. Each wireless packet of the plurality of wireless packets includes a plurality of bits and a first group of bits. For each received wireless packet, the plurality of bits corresponding to the received wireless packet is de-spread, and the first group of bits is correlated with a predetermined group of bits. The method further includes performing a majority vote based on the correlation of the first group of bits of each received wireless packet and creating a corrected packet based in part on the majority vote.
    Type: Grant
    Filed: January 6, 2023
    Date of Patent: January 16, 2024
    Assignee: SR Technologies, Inc.
    Inventor: Graham K. Smith
  • Patent number: 11812403
    Abstract: A method in a wireless device (WD) is described. The method is at least for determining a geo-location of a target station using round-trip times (RTTs) of a plurality of signals transmitted by the WD and a plurality of response signals received from the target station corresponding to the plurality of signals transmitted by the WD. The method includes determining an expected response signal, and, for each transmitted signal of the plurality of signals, determining that a response signal type matches an expected response signal type, cross-correlating a set of samples of the response signal, searching for a predetermined characteristic of the expected response signal, and correlating at least a subset of bits of the set of bits of the received response signal with the set of expected bits of the expected response signal. Further, a peak rolling sum correlation and the RTTs are determined.
    Type: Grant
    Filed: May 15, 2023
    Date of Patent: November 7, 2023
    Assignee: SR Technologies, Inc.
    Inventors: Olivia Turner, Ryan Busser, Graham K. Smith
  • Patent number: 11802956
    Abstract: A method in a first wireless device (WD) is described. The method includes determining a plurality of expected response signals, each having a scrambling seed number and an expected sequence of time domain symbols; receiving a plurality of response signals; determining a plurality of frequency shifted time domain samples, cross-correlating each frequency shifted time domain sample with the expected sequence of time domain symbols, for each scrambling seed number of each expected response signal; determining a maximum correlation value for each frequency shift and each frequency shifted time domain sample; summing the maximum correlation value for each frequency shift, each frequency shifted time domain sample, and each response signal; determining a peak correlation value based on the summed maximum correlation value; and determining at least the round trip time associated with the plurality of ranging signals based at least in part on the peak correlation value.
    Type: Grant
    Filed: April 14, 2023
    Date of Patent: October 31, 2023
    Assignee: SR Technologies, Inc.
    Inventors: Graham K. Smith, Ryan Busser, Olivia Turner
  • Publication number: 20230328030
    Abstract: A method, apparatus, and system are described. A method in an access point (AP) configured for medium access control (MAC) address designation (MAAD) is described. The AP is configured to wirelessly communicate with a station (STA). The method comprises determining a first MAC address of the STA, where the first MAC address is usable as a transmitter address (TA) of the STA for a subsequent association to the AP by the STA, and transmitting the first MAC address to the STA in one of a response action frame and a message of a multiple-message handshake process.
    Type: Application
    Filed: February 1, 2023
    Publication date: October 12, 2023
    Inventor: Graham K. SMITH
  • Publication number: 20230292279
    Abstract: A method in a wireless device (WD) is described. The method is at least for determining a geo-location of a target station using round-trip times (RTTs) of a plurality of signals transmitted by the WD and a plurality of response signals received from the target station corresponding to the plurality of signals transmitted by the WD. The method includes determining an expected response signal, and, for each transmitted signal of the plurality of signals, determining that a response signal type matches an expected response signal type, cross-correlating a set of samples of the response signal, searching for a predetermined characteristic of the expected response signal, and correlating at least a subset of bits of the set of bits of the received response signal with the set of expected bits of the expected response signal. Further, a peak rolling sum correlation and the RTTs are determined.
    Type: Application
    Filed: May 15, 2023
    Publication date: September 14, 2023
    Inventors: Olivia TURNER, Ryan BUSSER, Graham K. SMITH
  • Patent number: 11750333
    Abstract: A method in a monitoring station configured for communication with a wireless device is described. The method includes determining a round trip time, RTT, that corresponds to a first packet transmitted to the wireless device; receiving a second packet from the wireless device; determining the second packet from the wireless device has been received without error based at least in part on an error-detecting field; and receiving a subsequent packet from the wireless device. The method further includes determining that the subsequent packet received is a second packet retransmission; determining a preamble receipt time of the subsequent packet; determining a delay value based in part on the RTT of the first packet, the length field of the subsequent packet, and data rate field of the subsequent packet. The first acknowledgement packet is transmitted timed at the delay value after the preamble receipt time of the subsequent packet.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: September 5, 2023
    Assignee: SR Technologies, Inc.
    Inventors: Ryan Busser, Olivia Fernandez, Graham K. Smith
  • Patent number: 11736902
    Abstract: A method and wireless devices (WDs) for geo-location of wireless devices are disclosed. According to one aspect, a method in a first WD includes: transmitting a sequence of ranging signals and receiving a plurality of ranging response signals from a second WD, the ranging response signals being responsive to the ranging signals. For each of the plurality of ranging response signals, a received sequence of bits is determined. A correlation between the received sequence of bits and an expected sequence of bits is determined. The method also includes determining a subset of the plurality of received sequences of bits deemed not to arise from noise, and determining the subset being based at least in part on the correlations. The method also includes determining a distance between the first WD and the second WD based at least in part on a plurality of received sequences in the subset.
    Type: Grant
    Filed: December 1, 2022
    Date of Patent: August 22, 2023
    Assignee: SR Technologies, Inc.
    Inventors: Mark Passler, Graham K. Smith, Ryan Busser, Olivia Turner, Steven Romanow
  • Patent number: 11736272
    Abstract: A method for a mobile station (STA) is described. The method may be performed to use an identifiable medium access control (MAC) random (IRM) address (IRMA) to associate to an access point (AP). The method includes exchanging one IRM key (IRMK) with the AP for each association of a plurality of associations; determining an IRM hash using the IRMA and the IRMK exchanged with the AP at an immediately previous association of the plurality of associations and/or a temporal element; associating to the AP using the IRMA as a transmitted address (TA); and transmitting an association request including the IRM hash. The transmitted association request triggers the AP to one or both of check a list of stored IRMKs to find one stored IRMK that together with the IRMA produces the IRM hash included in the association request and identify the STA by the one IRMK.
    Type: Grant
    Filed: December 1, 2022
    Date of Patent: August 22, 2023
    Assignee: SR Technologies, Inc.
    Inventors: Graham K. Smith, Olivia Turner
  • Publication number: 20230251371
    Abstract: A method in a first wireless device (WD) is described. The method includes determining a plurality of expected response signals, each having a scrambling seed number and an expected sequence of time domain symbols; receiving a plurality of response signals; determining a plurality of frequency shifted time domain samples, cross-correlating each frequency shifted time domain sample with the expected sequence of time domain symbols, for each scrambling seed number of each expected response signal; determining a maximum correlation value for each frequency shift and each frequency shifted time domain sample; summing the maximum correlation value for each frequency shift, each frequency shifted time domain sample, and each response signal; determining a peak correlation value based on the summed maximum correlation value; and determining at least the round trip time associated with the plurality of ranging signals based at least in part on the peak correlation value.
    Type: Application
    Filed: April 14, 2023
    Publication date: August 10, 2023
    Inventors: Graham K. SMITH, Ryan BUSSER, Olivia TURNER
  • Publication number: 20230208617
    Abstract: A method for a mobile station (STA) is described. The method may be performed to use an identifiable medium access control (MAC) random (IRM) address (IRMA) to associate to an access point (AP). The method includes exchanging one IRM key (IRMK) with the AP for each association of a plurality of associations; determining an IRM hash using the IRMA and the IRMK exchanged with the AP at an immediately previous association of the plurality of associations and/or a temporal element; associating to the AP using the IRMA as a transmitted address (TA); and transmitting an association request including the IRM hash. The transmitted association request triggers the AP to one or both of check a list of stored IRMKs to find one stored IRMK that together with the IRMA produces the IRM hash included in the association request and identify the STA by the one IRMK.
    Type: Application
    Filed: December 1, 2022
    Publication date: June 29, 2023
    Inventors: Graham K. SMITH, Olivia TURNER
  • Patent number: 11686838
    Abstract: A method in a first wireless device (WD) is described. The method includes determining a plurality of expected response signals, each having a scrambling seed number and an expected sequence of time domain symbols; receiving a plurality of response signals; determining a plurality of frequency shifted time domain samples, cross-correlating each frequency shifted time domain sample with the expected sequence of time domain symbols, for each scrambling seed number of each expected response signal; determining a maximum correlation value for each frequency shift and each frequency shifted time domain sample; summing the maximum correlation value for each frequency shift, each frequency shifted time domain sample, and each response signal; determining a peak correlation value based on the summed maximum correlation value; and determining at least the round trip time associated with the plurality of ranging signals based at least in part on the peak correlation value.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: June 27, 2023
    Assignee: SR Technologies, Inc.
    Inventors: Graham K. Smith, Ryan Busser, Olivia Fernandez
  • Patent number: 11683778
    Abstract: A method in a wireless device (WD) is described. The method is at least for determining a geo-location of a target station using round-trip times (RTTs) of a plurality of signals transmitted by the WD and a plurality of response signals received from the target station corresponding to the plurality of signals transmitted by the WD. The method includes determining an expected response signal, and, for each transmitted signal of the plurality of signals, determining that a response signal type matches an expected response signal type, cross-correlating a set of samples of the response signal, searching for a predetermined characteristic of the expected response signal, and correlating at least a subset of bits of the set of bits of the received response signal with the set of expected bits of the expected response signal. Further, a peak rolling sum correlation and the RTTs are determined.
    Type: Grant
    Filed: May 13, 2021
    Date of Patent: June 20, 2023
    Assignee: SR Technologies, Inc.
    Inventors: Olivia Fernandez, Ryan Busser, Graham K. Smith
  • Publication number: 20230155729
    Abstract: A method in a first wireless device (WD) supporting wireless communication with a second WD is described. A plurality of wireless packets is received from the second WD including at least a first wireless packet. At least another wireless packet of the plurality of wireless packets is one of a retry packet and a repeat packet of the first packet. Each wireless packet of the plurality of wireless packets includes a plurality of bits and a first group of bits. For each received wireless packet, the plurality of bits corresponding to the received wireless packet is de-spread, and the first group of bits is correlated with a predetermined group of bits. The method further includes performing a majority vote based on the correlation of the first group of bits of each received wireless packet and creating a corrected packet based in part on the majority vote.
    Type: Application
    Filed: January 6, 2023
    Publication date: May 18, 2023
    Inventor: Graham K. SMITH
  • Publication number: 20230121193
    Abstract: A method in a monitoring station configured for communication with a wireless device is described. The method includes determining a round trip time, RTT, that corresponds to a first packet transmitted to the wireless device; receiving a second packet from the wireless device; determining the second packet from the wireless device has been received without error based at least in part on an error-detecting field; and receiving a subsequent packet from the wireless device. The method further includes determining that the subsequent packet received is a second packet retransmission; determining a preamble receipt time of the subsequent packet; determining a delay value based in part on the RTT of the first packet, the length field of the subsequent packet, and data rate field of the subsequent packet. The first acknowledgement packet is transmitted timed at the delay value after the preamble receipt time of the subsequent packet.
    Type: Application
    Filed: October 6, 2021
    Publication date: April 20, 2023
    Inventors: Ryan BUSSER, Olivia FERNANDEZ, Graham K. SMITH
  • Patent number: 11627548
    Abstract: A method in a measuring station is described. The method includes determining a plurality of Time of Flights (TOFs) corresponding to plurality of beacons and determining an overall circular error probability ellipse (CEP) based at least in part upon a plurality of times of departure and a corresponding plurality of measuring station positions for each TOF. The method further includes determining at least one individual CEP of a plurality of individual CEPs if at least one of a predetermined time has elapsed and the measuring station has travelled a predetermined distance and determining a merged CEP, where the merged CEP includes the plurality of individual CEPs. Further, the merged CEP is determined to be a better CEP if the merged CEP is more consistent with the plurality of individual CEPs than with the overall CEP. The better CEP is usable to determine a location of a wireless device.
    Type: Grant
    Filed: September 1, 2022
    Date of Patent: April 11, 2023
    Assignee: SR Technologies, Inc.
    Inventors: Mark Passler, Nicholas D. Boyer, Graham K. Smith
  • Patent number: 11622341
    Abstract: A method implemented in a first wireless device is described. The method includes transmitting a plurality of paging requests, receiving a first plurality of bit streams, and performing a first correlation, during a reception window, of each bit stream. When a correlation threshold is exceeded, a synchronization packet is transmitted, a bit stream received, and a second correlation performed. When a third time difference between a first time difference and a second time difference is within a predetermined time difference range, a plurality of poll packets is transmitted, a second plurality of bit streams received, and a third correlation is performed of each bit stream of the second plurality of bit streams with a second expected bit stream. The method further includes determining a correlation time of a maximum correlation value of each poll packet and determining the plurality of RTTs corresponding to the plurality of poll pockets.
    Type: Grant
    Filed: April 19, 2022
    Date of Patent: April 4, 2023
    Assignee: SR Technologies, Inc.
    Inventors: Graham K. Smith, Joaquin Prendes, Mark Passler, Nikolaos Glantzis