Patents by Inventor Christopher Peter Callender

Christopher Peter 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: 10117164
    Abstract: A method for reselection of a cell in a wireless network comprises a) detecting that a level of a current serving cell is below a threshold defined for the current serving cell; b) determining the availability of a target cell at a lower or equal priority layer than the current serving cell; c) determining, for at least one available target cell at a lower or equal priority layer than the current serving cell, whether the available target cell has a level above a threshold defined for the available target cell; and d) selecting the available target cell if the determination at c) is affirmative; if the determination at c) is negative, using a hysteresis to select any target cell with a level better than the serving cell.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: October 30, 2018
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Christopher Peter Callender, Harri Aatos Jokinen, Leonardo Provvedi
  • Patent number: 9445315
    Abstract: In accordance with an example embodiment of the present invention, a user equipment initiates autonomous cell reselection from a source cell to a target cell. Subsequent to the reselection, the user equipment transmits information relating to the source cell to the target cell. The network is in some embodiments configured to use the information for self-organizing network purposes by connecting source-target cell pairs as neighbors.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: September 13, 2016
    Assignee: Nokia Technologies Oy
    Inventor: Christopher Peter Callender
  • Patent number: 9307463
    Abstract: A user equipment UE determines that a neighbor cell is higher priority than a serving cell, measures neighbor cell signal strength in n>1 iterations, and analyzes them for reselecting from the serving cell to the neighbor cell. Each measurement iteration is spaced from one another by a time interval (e.g., 1 DRX) that is specific for the neighbor cell being higher priority. In various embodiments, the UE measures while in a Cell-PCH, URA-PCH or idle state/mode and the first iteration is taken at the first available measurement opportunity after transitioning to that state/mode. The UE reselects to the neighbor cell based on the analyzed signal strengths; in one embodiment the decision to reselect is without regard to signal quality of the serving cell; and in another the decision is without regard to whether a reselection condition remains satisfied for a specified time period Treselection.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: April 5, 2016
    Assignee: Xiaomi H.K. Limited
    Inventors: Brian Alexander Martin, Christopher Peter Callender, Stuart Ian Geary, Alexander Graham Charles, Steven Franklin, James Howard Tooley
  • Patent number: 9301209
    Abstract: A system to obtain an enhanced-transport format combination (E-TFC) for transmitting a scheduling information (SI) in a soft handoff (SHO) to a serving enhanced Data Channel (E-DCH) cell in a heterogeneous Network (HetNet). The system comprises receiving an E-TFC selection power backoff (ESPB) value from an active macro-cell, the active macro-cell being the service E-DCH cell; determining the E-TFC based on an indicated power of a serving grant minus the received ESPB value and a set of E-TFC power offset value received from the active macro cell, if an MAC-e/i data PDU to be transmitted is multiplexed with the SI; otherwise, determining the E-TFC based on the indicated power of the serving grant and the set of E-TFC power offset value; and transmitting the MAC-e/i PDU to the active macro cell using the indicated power of the serving grant and an enhanced dedicated channel selected based on the determined E-TFC.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: March 29, 2016
    Assignee: BROADCOM CORPORATION
    Inventors: Tao Chen, Arto Lehti, Christopher Peter Callender, Marko Lampinen
  • Patent number: 9094882
    Abstract: A network sends to a user equipment UE downlink signaling indicating at least one frequency which is subject to special handling. In response the UE measures and reports neighbor cells operating on any of that/those frequencies without regard to a threshold signal strength of a serving cell which is configured for reporting neighbor cells. In more specific examples, if the neighbor cells operating on any of that/those frequencies is considered a first set of neighbor cells, then the network also sends a second set of neighbor cells in other downlink signaling. Measuring and reporting on the first set of neighbor cells is less frequent than for the second set of neighbor cells, when measurements of the second set is required. Measuring and reporting on the second set is dependent on measured signal strength of a serving cell being greater than the configured threshold signal strength of the serving cell.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: July 28, 2015
    Assignee: BROADCOM CORPORATION
    Inventors: Christopher Peter Callender, Tao Chen
  • Patent number: 8971813
    Abstract: A method is provided for avoiding in-device interference. The method may include determining a portion of a frequency band used for data reception by a first wireless modem that may be affected by interference from a data transmission by a second wireless modem. The method may further include causing an indication of the determined portion of the frequency band to be provided to the first wireless modem. A corresponding apparatus and computer program product are also provided.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: March 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Christopher Peter Callender, Juho Mikko Pirskanen
  • Patent number: 8948761
    Abstract: Each entry in a prioritized measurement list defines a unique combination of frequency layer and radio access technology (RAT) for cells. Based on signal strength and/or signal quality of the serving cell, a set of entries for measuring is selected from a neighbor list according to the prioritized measurement list and according to a selection rule. The selection rule provides: for the case the at least signal strength or quality of the serving cell is higher than a respective strength/quality threshold, the selected set is a first set; and for the case the at least signal strength or quality of the serving cell is lower than a respective strength/quality threshold, the selected set is a different second set of the prioritized measurement list that excludes all frequency layers of the prioritized measurement list belonging to the RAT having a highest (or alternatively a lowest) priority.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: February 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Brian Alexander Martin, Christopher Peter Callender
  • Patent number: 8909229
    Abstract: A user equipment UE determines that a neighbor cell is higher priority than a serving cell, measures neighbor cell signal strength in n>1 iterations, and analyzes them for reselecting from the serving cell to the neighbor cell. Each measurement iteration is spaced from one another by a time interval (e.g., 1 DRX) that is specific for the neighbor cell being higher priority. In various embodiments, the UE measures while in a Cell-PCH, URA-PCH or idle state/mode and the first iteration is taken at the first available measurement opportunity after transitioning to that state/mode. The UE reselects to the neighbor cell based on the analyzed signal strengths; in one embodiment the decision to reselect is without regard to signal quality of the serving cell; and in another the decision is without regard to whether a reselection condition remains satisfied for a specified time period Treselection.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: December 9, 2014
    Assignee: Broadcom Corporation
    Inventors: Brian Alexander Martin, Christopher Peter Callender, Stuart Ian Geary, Alexander Graham Charles, Steven Franklin, James Howard Tooley
  • Patent number: 8861412
    Abstract: The specification and drawings present a new method, apparatus and software related product for avoiding UL interference in a victim LPN such as femtocell using DRX by the LPN coordinated with the UL DTX of UEs to the LPN and to one or more HPNs such as NBs (or Home NB), e.g., in HSPA systems. The victim LPN may start DRX having ON and OFF periods. Then the LPN sends information about DRX to its UEs (LUEs) communicating with the LPN, and to one or more network elements such as aggressor HPNs' RNCs. The network element(s) are adapted to identify and configure aggressor UEs (HUEs) communicating with one or more HPNs of the network for coordinating ON and OFF periods of the DRX by the LPN with transmissions of the LUEs and the HUEs to avoid interference during the OFF periods of the DRX in the LPN.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: October 14, 2014
    Assignee: Broadcom Corporation
    Inventors: Tao Chen, Christopher Peter Callender, Arto Lehti, Soni Koul
  • Publication number: 20130343223
    Abstract: Each entry in a prioritized measurement list defines a unique combination of frequency layer and radio access technology (RAT) for cells. Based on signal strength and/or signal quality of the serving cell, a set of entries for measuring is selected from a neighbor list according to the prioritized measurement list and according to a selection rule. The selection rule provides: for the case the at least signal strength or quality of the serving cell is higher than a respective strength/quality threshold, the selected set is a first set; and for the case the at least signal strength or quality of the serving cell is lower than a respective strength/quality threshold, the selected set is a different second set of the prioritized measurement list that excludes all frequency layers of the prioritized measurement list belonging to the RAT having a highest (or alternatively a lowest) priority.
    Type: Application
    Filed: August 30, 2013
    Publication date: December 26, 2013
    Applicant: Renesas Mobile Corporation
    Inventors: Brian Alexander Martin, Christopher Peter Callender
  • Patent number: 8605668
    Abstract: A user equipment UE obtains channel configurations from each of a serving cell and n neighbor cells which have been determined to be suitable for data communications with the UE, from which the UE creates a combined channel configuration and utilizes it for multipoint communications with those cells. In specific embodiments: the respective channel configurations are obtained from the respective cells' system information; the n neighbor cells are determined to be suitable by the UE comparing each cell's received signal strength/quality against a threshold. The UE may get a neighbor cell list NCL and the threshold and consider each cell on the NCL as one of the n neighbor cells if its signal strength/quality exceed the threshold, then the UE may acquire system information for only those n neighbor cells instead of all cells on the NCL. The UE then reports in uplink signaling that the n neighbor cells are suitable.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: December 10, 2013
    Assignee: Renesas Mobile Corporation
    Inventors: Keiichi Kubota, Brian Alexander Martin, Luis Miguel Santos Barreto, Christopher Peter Callender
  • Patent number: 8543117
    Abstract: A prioritized measurement list is stored in a memory, and each entry in the prioritized measurement list defines a unique combination of frequency layer and radio access technology for a serving cell and for neighbor cells. Based on at least signal strength of the serving cell, there is selected, from a neighbor list according to the prioritized measurement list, a set of entries for measuring according to a selection rule. The selection rule provides: for the case in which the signal strength of the serving cell is relatively high, the selected set is a first set and represents higher priority ones of the prioritized measurement list; and for the case in which the signal strength of the serving cell is relatively low, the selected set is a second set and represents lower priority ones of the prioritized measurement list.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: September 24, 2013
    Assignee: Renesas Mobile Corporation
    Inventors: Brian Alexander Martin, Christopher Peter Callender
  • Publication number: 20130194986
    Abstract: The specification and drawings present a new method, apparatus and software related product for avoiding UL interference in a victim LPN such as femtocell using DRX by the LPN coordinated with the UL DTX of UEs to the LPN and to one or more HPNs such as NBs (or Home NB), e.g., in HSPA systems. The victim LPN may start DRX having ON and OFF periods. Then the LPN sends information about DRX to its UEs (LUEs) communicating with the LPN, and to one or more network elements such as aggressor HPNs' RNCs. The network element(s) are adapted to identify and configure aggressor UEs (HUEs) communicating with one or more HPNs of the network for coordinating ON and OFF periods of the DRX by the LPN with transmissions of the LUEs and the HUEs to avoid interference during the OFF periods of the DRX in the LPN.
    Type: Application
    Filed: February 3, 2012
    Publication date: August 1, 2013
    Inventors: Tao CHEN, Christopher Peter Callender, Arto Lehti, Soni Koul
  • Publication number: 20130189971
    Abstract: A network sends to a user equipment UE downlink signaling indicating at least one frequency which is subject to special handling. In response the UE measures and reports neighbour cells operating on any of that/those frequencies without regard to a threshold signal strength of a serving cell which is configured for reporting neighbour cells. In more specific examples, if the neighbour cells operating on any of that/those frequencies is considered a first set of neighbour cells, then the network also sends a second set of neighbour cells in other downlink signaling. Measuring and reporting on the first set of neighbour cells is less frequent than for the second set of neighbour cells, when measurements of the second set is required. Measuring and reporting on the second set is dependent on measured signal strength of a serving cell being greater than the configured threshold signal strength of the serving cell.
    Type: Application
    Filed: January 26, 2012
    Publication date: July 25, 2013
    Inventors: Christopher Peter Callender, Tao Chen
  • Publication number: 20130084850
    Abstract: A prioritized measurement list is stored in a memory, and each entry in the prioritized measurement list defines a unique combination of frequency layer and radio access technology for a serving cell and for neighbor cells. Based on at least signal strength of the serving cell, there is selected, from a neighbor list according to the prioritized measurement list, a set of entries for measuring according to a selection rule. The selection rule provides: for the case in which the signal strength of the serving cell is relatively high, the selected set is a first set and represents higher priority ones of the prioritized measurement list; and for the case in which the signal strength of the serving cell is relatively low, the selected set is a second set and represents lower priority ones of the prioritized measurement list.
    Type: Application
    Filed: October 3, 2011
    Publication date: April 4, 2013
    Inventors: Brian Alexander Martin, Christopher Peter Callender
  • Publication number: 20130084866
    Abstract: A prioritized measurement list is stored in a memory, and each entry in the prioritized measurement list defines a unique combination of frequency layer and radio access technology for a serving cell and for neighbor cells. Based on at least signal strength of the serving cell, there is selected, from a neighbor list according to the prioritized measurement list, a set of entries for measuring according to a selection rule. The selection rule provides: for the case in which the signal strength of the serving cell is relatively high, the selected set is a first set and represents higher priority ones of the prioritized measurement list; and for the case in which the signal strength of the serving cell is relatively low, the selected set is a second set and represents lower priority ones of the prioritized measurement list.
    Type: Application
    Filed: June 15, 2012
    Publication date: April 4, 2013
    Inventors: Brian Alexander Martin, Christopher Peter Callender
  • Publication number: 20120320769
    Abstract: Embodiments of the invention are concerned with multicarrier communication support, such as non-adjacent multicarrier support for a contiguous-bandwidth receiver. One embodiment includes receiving one or more carriers in a configurable contiguous bandwidth, calculating an imbalance metric representing a receiving imbalance over a set of carriers, said imbalance metric representing a difference between a first value based on received signal strength indication on each of one or more carriers and a second value based on received signal strength indication on each of one or more carriers, verifying, based on the calculated imbalance metric, whether a threshold condition relating to a current mode of an adjacent carrier mode and non-adjacent carrier mode is satisfied, and reporting an event for triggering reconfiguration of said configurable contiguous bandwidth to switch the current mode between said adjacent and non-adjacent carrier modes, if the threshold condition is satisfied.
    Type: Application
    Filed: October 21, 2011
    Publication date: December 20, 2012
    Inventor: Christopher Peter Callender
  • Publication number: 20120320879
    Abstract: A user equipment UE determines that a neighbor cell is higher priority than a serving cell, measures neighbor cell signal strength in n>1 iterations, and analyzes them for reselecting from the serving cell to the neighbor cell. Each measurement iteration is spaced from one another by a time interval (e.g., 1 DRX) that is specific for the neighbor cell being higher priority. In various embodiments, the UE measures while in a Cell-PCH, URA-PCH or idle state/mode and the first iteration is taken at the first available measurement opportunity after transitioning to that state/mode. The UE reselects to the neighbor cell based on the analyzed signal strengths; in one embodiment the decision to reselect is without regard to signal quality of the serving cell; and in another the decision is without regard to whether a reselection condition remains satisfied for a specified time period Treselection.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 20, 2012
    Inventors: Brian Alexander Martin, Christopher Peter Callender, Stuart I. Geary, Alexander Graham Charles, Steven Franklin, James Howard Tooley
  • Patent number: 8320276
    Abstract: Embodiments of the invention are concerned with multicarrier communication support, such as non-adjacent multicarrier support for a contiguous-bandwidth receiver. One embodiment includes receiving one or more carriers in a configurable contiguous bandwidth, calculating an imbalance metric representing a receiving imbalance over a set of carriers, said imbalance metric representing a difference between a first value based on received signal strength indication on each of one or more carriers and a second value based on received signal strength indication on each of one or more carriers, verifying, based on the calculated imbalance metric, whether a threshold condition relating to a current mode of an adjacent carrier mode and non-adjacent carrier mode is satisfied, and reporting an event for triggering reconfiguration of said configurable contiguous bandwidth to switch the current mode between said adjacent and non-adjacent carrier modes, if the threshold condition is satisfied.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: November 27, 2012
    Assignee: Renesas Mobile Corporation
    Inventor: Christopher Peter Callender
  • Publication number: 20120275389
    Abstract: A user equipment UE obtains channel configurations from each of a serving cell and n neighbor cells which have been determined to be suitable for data communications with the UE, from which the UE creates a combined channel configuration and utilizes it for multipoint communications with those cells. In specific embodiments: the respective channel configurations are obtained from the respective cells' system information; the n neighbor cells are determined to be suitable by the UE comparing each cell's received signal strength/quality against a threshold. The UE may get a neighbor cell list NCL and the threshold and consider each cell on the NCL as one of the n neighbor cells if its signal strength/quality exceed the threshold, then the UE may acquire system information for only those n neighbor cells instead of all cells on the NCL. The UE then reports in uplink signaling that the n neighbor cells are suitable.
    Type: Application
    Filed: April 28, 2011
    Publication date: November 1, 2012
    Inventors: Keiichi Kubota, Brian Alexander Martin, Luis Miguel Santos Barreto, Christopher Peter Callender