Patents by Inventor Christopher Callender

Christopher Callender 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: 10624066
    Abstract: The disclosure relates to a method and a wireless device for communication in a wireless communication network, the method comprising the steps of obtaining information of a level of duplication of one or more common control signals or channels; and receiving the common control signals or channels using the obtained information. The method further relates to a network node and a method thereof.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: April 14, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Muhammad Kazmi, Christopher Callender, Iana Siomina
  • Patent number: 10547373
    Abstract: A flight transceiver station (FTS) mounted onboard an aircraft communicates with one or more terrestrial transceiver points by determining, for a future moment in time, a position of the flight transceiver station in 3-dimensional space; an attitude of the flight transceiver station; one or more respective directions from the position of the flight transceiver station to the one or more terrestrial transceiver points; respective radial velocities between the flight transceiver station and the one or more terrestrial transceiver points. The FTS also determines, based on the respective directions and attitudes, beamforming weights for one or more transmit beams towards each of the one or more terrestrial transceiver points; and predicts, based on the respective radial velocities, respective Doppler shifts of a carrier frequency used between the flight transceiver station and the one or more terrestrial transceiver points.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: January 28, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Joakim Axmon, Christopher Callender, Mikael Prytz, Imadur Rahman, Esther Sienkiewicz
  • Publication number: 20190342840
    Abstract: A network node is provided. The network node includes circuitry configured to determine a Transmission Time Interval, TTI, configuration, the TTI configuration including a first TTI for operating a first signal between a first cell on a first carrier and a wireless device, and a second TTI for operating a second signal between the first cell on the first carrier and the wireless device, the TTI configuration including one of: the first TTI adjacent to the second TTI which do not overlap with each other in time; and the first TTI adjacent to the second TTI which at least partly overlap with each other in time, and configured to receive the first signal in the first TTI and the second signal in the second TTI, the first TTI and second TTI having been transmitted based on a maximum output power parameter that is based on the TTI configuration.
    Type: Application
    Filed: November 14, 2017
    Publication date: November 7, 2019
    Inventors: Imadur RAHMAN, Christian BERGLJUNG, Christopher CALLENDER, Dominique EVERAERE, Muhammad KAZMI, Mårten SUNDBERG
  • Publication number: 20190305912
    Abstract: A method, wireless device and network node for supporting at least one transmission time interval, TTI, are disclosed. According to one aspect, a method includes communicating with a network node in a first cell on a first carrier. The method further includes determining an operation to be performed by the wireless device in a second cell on a second carrier. The method further includes performing the determined operation in the second cell while interrupting the communication with the network node in the first cell on the first carrier according to an interruption parameter that does not exceed an interruption threshold that depends on a duration of a TTI on the first carrier.
    Type: Application
    Filed: November 17, 2017
    Publication date: October 3, 2019
    Inventors: Muhammad KAZMI, Joakim AXMON, Christopher CALLENDER, Imadur RAHMAN
  • Patent number: 10420028
    Abstract: In some embodiments, a method of multi-connectivity operation of a wireless device in Discontinuous Reception (DRX) comprises determining whether a first DRX ON duration in a first DRX cycle configured for use by the wireless device in a first Cell Group (CG) for multi-connectivity operation and a second DRX ON duration in a second DRX cycle configured for use by the wireless device in a second CG for multi-connectivity operation partially overlap in time with one another. The method further comprises, upon determining that the first DRX ON duration and the second DRX ON duration partially overlap, taking one or more actions that mitigate the partial overlap between the first DRX ON duration in the first DRX cycle and the second ON duration in the second DRX cycle. By avoiding partial overlap, interruptions at the wireless device as a result of transitioning between DRX states can be mitigated or avoided.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: September 17, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Imadur Rahman, Muhammad Kazmi, Christopher Callender
  • Publication number: 20190274100
    Abstract: According to certain embodiments, a method for activating and deactivating multiple secondary cells (150A-B) includes receiving a first message requesting activation or deactivation of a first secondary cell (first SCell) (150A) for a first carrier. In response to the first message, a first procedure is initiated to activate or deactivate the first SCell (150A). The wireless device (110A) may have a first delay period (Tactivate_basic) within which to complete the first procedure. While performing the first procedure to activate or deactivate the first SCell (150A), a second message to activate, deactivate, configure or deconfigure a second SCell (150B) for a second carrier is received.
    Type: Application
    Filed: May 14, 2019
    Publication date: September 5, 2019
    Inventors: Muhammad Kazmi, Christopher Callender, Iana Siomina
  • Publication number: 20190260462
    Abstract: A flight transceiver station (FTS) mounted onboard an aircraft communicates with one or more terrestrial transceiver points by determining, for a future moment in time, a position of the flight transceiver station in 3-dimensional space; an attitude of the flight transceiver station; one or more respective directions from the position of the flight transceiver station to the one or more terrestrial transceiver points; respective radial velocities between the flight transceiver station and the one or more terrestrial transceiver points. The FTS also determines, based on the respective directions and attitudes, beamforming weights for one or more transmit beams towards each of the one or more terrestrial transceiver points; and predicts, based on the respective radial velocities, respective Doppler shifts of a carrier frequency used between the flight transceiver station and the one or more terrestrial transceiver points.
    Type: Application
    Filed: October 26, 2017
    Publication date: August 22, 2019
    Inventors: Joakim Axmon, Christopher Callender, Mikael Prytz, Imadur Rahman, Esther Sienkiewicz
  • Publication number: 20190239169
    Abstract: A method in a wireless device for determining a power allocation for an uplink transmission and a wireless device configured for determining a power allocation for an uplink transmission. Wherein the power allocation is based on a remaining power for scheduled transmissions derived from a maximum transmitter power of the wireless device, less any power for non-scheduled transmissions and a reserved power for any scheduled data transmission on the second frequency derived from a filtered power of a dedicated physical control channel, DPCCH, and a power offset for an enhanced-transport format combination, E-TFC, of a transmission for the second frequency configured with the second TTI, wherein the filtered power is averaged over a number of slots having a total duration equal to the second TTI length.
    Type: Application
    Filed: September 29, 2017
    Publication date: August 1, 2019
    Inventors: Gerardo Agni MEDINA ACOSTA, Christopher CALLENDER, Cecilia EKLÖF, Waikwok KWONG, Kazuyoshi UESAKA
  • Publication number: 20190200305
    Abstract: According to certain embodiments, a method by a wireless device is provided for determining a maximum output power. The method includes obtaining, by the wireless device, a first time resource for transmitting a first signal in ?a first cell on a first carrier and a second time resource for transmitting a second signal in a second cell on a second carrier. Based on the first time resource and the second time resource, the maximum output power is 10 determined. The first signal and the second signal are transmitted based on the determined maximum output power.
    Type: Application
    Filed: November 3, 2017
    Publication date: June 27, 2019
    Inventors: Muhammad KAZMI, Christian BERGLJUNG, Christopher CALLENDER, Dominique EVERAERE, Imadur RAHMAN, Laetitia FALCONETT, Mårten SUNDBERG
  • Patent number: 10333683
    Abstract: Different Out-of-sync thresholds are defined for Radio Link Monitoring by a UE having a selectively enabled advanced receiver feature. When the advanced receiver feature is disabled, the UE monitors received signal quality and compares a signal quality metric to a first threshold developed for a reference receiver. When the advanced receiver feature is enabled, the UE compares the signal quality metric to a second threshold indicating lower signal quality than the first threshold. In either case, if the signal quality meets the respective threshold, the UE goes Out-of-sync. The Out-of-sync UE continues to monitor received signal quality. Regardless of whether the advanced receiver feature is enabled or not, a third threshold, developed for the reference receiver, is applied to determine when to return to In-sync. In one embodiment, the reference receiver enables two antennas, and the advanced receiver feature is enabling four antennas.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: June 25, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Torgny Palenius, Christopher Callender, Maomao Chen, Fredrik Nordström
  • Patent number: 10306524
    Abstract: Antenna nodes are controlled to maintain a respective radio cell, each cell having one and the same physical cell identity. The antenna nodes are further controlled to maintain the respective radio cell in a single direction substantially along a path such that each wireless communication device, during movement in a movement direction along the path, can connect either to consecutive antenna nodes towards which the wireless communication device is moving or connect to consecutive antenna nodes away from which the wireless communication device is moving.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: May 28, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Joakim Axmon, Peter Alriksson, Niklas Andgart, Christopher Callender, Maomao Chen, Magnus Larsson, Fredrik Nordstrom, Torgny Palenius
  • Patent number: 10306502
    Abstract: Embodiments herein relate to a method performed by a radio network node (12) for configuring a wireless device (10), being served by the radio network node (12), for performing radio measurements. The radio network node (12) determines at least two groups, a first and a second group, of carriers out of a number of carriers, wherein the first group comprises at least one carrier to perform radio measurements on by the wireless device (10) when the wireless device (10) being configured with a DRX cycle above a threshold. The radio network node (12) furthermore transmits a message comprising an indication of the at least one carrier of the first group and informing the wireless device (10) which carrier or carriers to perform radio measurements on when the wireless device (10) is configured with the DRX cycle above the threshold.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: May 28, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Santhan Thangarasa, Christopher Callender, Muhammad Kazmi
  • Patent number: 10299204
    Abstract: According to certain embodiments, a method for activating and deactivating multiple secondary cells (150A-B) includes receiving a first message requesting activation or deactivation of a first secondary cell (first SCell) (150A) for a first carrier. In response to the first message, a first procedure is initiated to activate or deactivate the first SCell (150A). The wireless device (110A) may have a first delay period (Tactivate_basic) within which to complete the first procedure. While performing the first procedure to activate or deactivate the first SCell (150A), a second message to activate, deactivate, configure or deconfigure a second SCell (150B) for a second carrier is received.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: May 21, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Muhammad Kazmi, Christopher Callender, Iana Siomina
  • Publication number: 20190141740
    Abstract: A wireless device and a method for a wireless device served by a first network node on a primary cell (PCell) is provided. The wireless device is capable of using at least two secondary serving cells (SCells). A first request to perform a measurement on at least one cell on a first secondary component carrier (SCC) with a deactivated first SCell using at least a first measurement cycle is received. A second request to perform a measurement on at least one cell on a second SCC with a deactivated second SCell using at least a second measurement cycle is received. An effective serving cell interruption probability (Peff) of missed at least one of Acknowledgement and Negative-Acknowledgement signaling in an uplink direction is determined based on at least the first measurement cycle and the second measurement cycle. A serving cell interruption probability is ensured to not exceed the determined Peff.
    Type: Application
    Filed: January 4, 2019
    Publication date: May 9, 2019
    Inventors: Muhammad KAZMI, Christopher CALLENDER, Iana SIOMINA
  • Publication number: 20190116461
    Abstract: At least one periodic operation is configured in a wireless communication system comprising a plurality of wireless devices and a serving network serving the wireless devices. The periodic operation is selectively configurable at one of a shorter periodicity interval and a longer periodicity interval. A method implementation performed by the serving network includes obtaining speed information indicative of the speed of one or more of the wireless devices in the wireless communication system and determining, based on the speed information, whether at least one of the one or more-wireless devices is moving at a speed at or above a speed threshold. The method further comprises configuring, if it is determined that at least one of the one or more-wireless devices is moving at a speed at or above the speed threshold, the at least one periodic operation with the shorter periodicity interval.
    Type: Application
    Filed: March 30, 2017
    Publication date: April 18, 2019
    Inventors: Christopher CALLENDER, Muhammad KAZMI, Iana SIOMINA
  • Patent number: 10219297
    Abstract: A wireless device and a method for a wireless device served by a first network node on a primary cell (PCell) is provided. The wireless device is capable of using at least two secondary serving cells (SCells). A first request to perform a measurement on at least one cell on a first secondary component carrier (SCC) with a deactivated first SCell using at least a first measurement cycle is received. A second request to perform a measurement on at least one cell on a second SCC with a deactivated second SCell using at least a second measurement cycle is received. An effective serving cell interruption probability (Peff) of missed at least one of Acknowledgement and Negative-Acknowledgement signaling in an uplink direction is determined based on at least the first measurement cycle and the second measurement cycle. A serving cell interruption probability is ensured to not exceed the determined Peff.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: February 26, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Muhammad Kazmi, Christopher Callender, Iana Siomina
  • Publication number: 20190053087
    Abstract: Embodiments described herein are directed to methods for adaptively configuring a measurement period in a user equipment or another network node. The measurement period can be determined based at least in part on an assessment of one or more conditions, wherein each of the measurement periods is associated with at least one condition. The determined measurement period can be used for performing and/or reporting one or more measurements. According to certain embodiments, the measurement period may be adapted by maintaining concurrently two or more measurement filters with different measurement periods and then selecting the appropriate one, based on a condition assessment result.
    Type: Application
    Filed: December 28, 2016
    Publication date: February 14, 2019
    Inventors: Christopher Callender, Iana Siomina
  • Publication number: 20180368093
    Abstract: The disclosure relates to a method and wireless device configured for communication in a wireless communication network, the method comprising the steps of obtaining a first transmission time interval, TTI, used for transmission timing of a first signal, obtaining a second TTI, used for transmission timing of a second signal, obtaining a maximum received time difference, MRTD, parameter, and operating the first signal between a wireless device and a first cell using the MRTD parameter and a first carrier, and the second signal between the wireless device and a second cell using the MRTD parameter and a second carrier, the second carrier being different from the first carrier, wherein the MRTD parameter is obtained by determining the MRTD parameter based on the first and the second TTI. The disclosure further relates to a network node and a method thereof.
    Type: Application
    Filed: November 3, 2017
    Publication date: December 20, 2018
    Inventors: Imadur Rahman, Christopher Callender, Dominque Everaere, Muhammad Kazmi
  • Publication number: 20180317212
    Abstract: The disclosure relates to a method and a wireless device for communication in a wireless communication network, the method comprising the steps of obtaining information of a level of duplication of one or more common control signals or channels; and receiving the common control signals or channels using the obtained information. The method further relates to a network node and a method thereof.
    Type: Application
    Filed: October 31, 2017
    Publication date: November 1, 2018
    Inventors: Muhammad Kazmi, Christopher Callender, Iana Siomina
  • Publication number: 20180242183
    Abstract: Embodiments herein disclose e.g. a method performed by a communication terminal for handling signal measurements in a wireless communication network (1). The communication terminal may adapt a measurement procedure to construct a measurement sample of a reference signal from a cell operated by a radio network node (12); or adjust a filter algorithm of the measurement procedure based on one or more previous valid measurement samples of a previous reference signal from the cell, when measuring on the cell where reference signals are not available for the communication terminal at every designated reference signal occasion.
    Type: Application
    Filed: September 21, 2016
    Publication date: August 23, 2018
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mattias Bergström, Christopher Callender, Muhammad Kazmi, Imadur Rahman