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).

  • Publication number: 20210014752
    Abstract: Embodiments includes methods performed by a user equipment, LT, to schedule a plurality of mutually-exclusive repetitive measurement activities in a wireless network. Such embodiments include receiving, from a network node serving the UE, a measurement configuration comprising: least one measurement timing configuration for each of a plurality of mutually exclusive repetitive measurement activities; and identification of a measurement gap pattern for performing the measurement activities. Such embodiments also include selecting an analysis period for a measurement schedule, and determining, over the analysis period, measurement load information related to the measurement configuration. Such embodiments also include determining, based on the measurement load information, a measurement time scaling factor and a scaled measurement time for each measurement activity. Some embodiments include determining a measurement schedule and/or performing measurements based on the scaled measurement time.
    Type: Application
    Filed: April 4, 2019
    Publication date: January 14, 2021
    Inventors: Joakim Axmon, Christopher Callender, Muhammad Kazmi, Iana Siomina
  • Patent number: 10893491
    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: Grant
    Filed: November 3, 2017
    Date of Patent: January 12, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Muhammad Kazmi, Christian Bergljung, Christopher Callender, Dominique Everaere, Imadur Rahman, Laetitia Falconetti, Mårten Sundberg
  • Patent number: 10893427
    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: Grant
    Filed: September 21, 2016
    Date of Patent: January 12, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mattias Bergström, Christopher Callender, Muhammad Kazmi, Imadur Rahman
  • Patent number: 10893428
    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: Grant
    Filed: December 28, 2016
    Date of Patent: January 12, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Christopher Callender, Iana Siomina
  • Patent number: 10820153
    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: Grant
    Filed: March 30, 2017
    Date of Patent: October 27, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Christopher Callender, Muhammad Kazmi, Iana Siomina
  • Patent number: 10757669
    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: Grant
    Filed: November 3, 2017
    Date of Patent: August 25, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Imadur Rahman, Christopher Callender, Dominique Everaere, Muhammad Kazmi
  • Patent number: 10750455
    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: Grant
    Filed: September 29, 2017
    Date of Patent: August 18, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Gerardo Agni Medina Acosta, Christopher Callender, Cecilia Eklöf, Waikwok Kwong, Kazuyoshi Uesaka
  • Patent number: 10716136
    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: January 4, 2019
    Date of Patent: July 14, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Muhammad Kazmi, Christopher Callender, Iana Siomina
  • Publication number: 20200154296
    Abstract: A system and method for controlling measurements gaps in a communication system (300). In an embodiment, an apparatus (370) is operable in the communication system (300) and includes processing circuitry (375) and memory (380). The apparatus (370) is configured to receive a measurement gap pattern (610, 710) to perform a radio signal measurement from the communication system (300), and determine a limited duration to apply the measurement gap pattern (610, 710) to perform the radio signal measurement. The apparatus (370) is also configured to perform the radio signal measurement during the limited duration of the measurement gap pattern (610, 710).
    Type: Application
    Filed: March 14, 2018
    Publication date: May 14, 2020
    Inventors: Iana Siomina, Christopher Callender
  • 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
  • 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
  • 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
  • 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