Patents by Inventor James Earl Womack

James Earl Womack 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).

  • Providing a time offset between scheduling request and sounding reference symbol transmissions
    Patent number: 10028299
    Abstract: A user equipment (UE) including a processor configured to promote scheduling transmission of a series of scheduling requests offset a series of sounding reference symbols.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: July 17, 2018
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, James Earl Womack, Yi Yu
  • Method and system for dynamic ACK/NACK repetition for robust downlink MAC PDU transmission in LTE
    Patent number: 10020925
    Abstract: A method and apparatus for dynamic acknowledgement repetition for a downlink medium access control packet data unit transmission ‘MAC PDU’ requiring multiple acknowledgements, the method having the steps of: receiving the downlink MAC PDU requiring multiple acknowledgements; and utilizing a differentiating factor and acknowledgement scheme, sending the multiple acknowledgements.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: July 10, 2018
    Assignee: BlackBerry Limited
    Inventors: Takashi Suzuki, Zhijun Cai, James Earl Womack
  • System and method for uplink timing synchronization in conjunction with discontinuous reception
    Patent number: 10015742
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: July 3, 2018
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • System and method for uplink timing synchronization in conjunction with discontinuous reception
    Patent number: 10015758
    Abstract: Systems and methods for controlling sounding reference signal transmission are provided; a user equipment starts transmitting the sounding reference signal in anticipation of uplink data transmission, and then discontinues transmitting the sounding reference signal after completion of uplink data transmission.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: July 3, 2018
    Assignee: BlackBerry Limited
    Inventors: James Earl Womack, Zhijun Cai
  • System and Method for Semi-Persistent and Dynamic Scheduling and Discontinuous Reception Control
    Publication number: 20180146427
    Abstract: Methods of combining semi-persistent resource allocation and dynamic resource allocation are provided. Packets, such as VoIP packets, are transmitted on the uplink and downlink using respective semi-persistent resources. For each mobile device, awake periods and sleep periods are defined. The semi-persistent resources are aligned with the awake periods so that most of the time the mobile device can turn off its wireless access radio during the sleep periods. In addition, signalling to request, and to allocate, resources for additional packets are transmitted during the awake periods, and the resources allocated for the additional packets are within the awake windows.
    Type: Application
    Filed: November 21, 2017
    Publication date: May 24, 2018
    Inventors: Zhijun Cai, James Earl Womack
  • Method and System for Dynamic Ack/Nack Repitition for Robust Downlink Mac PDU Transmission in LTE
    Publication number: 20180131495
    Abstract: A method and apparatus for dynamic acknowledgement repetition for a downlink medium access control packet data unit transmission ‘MAC PDU’ requiring multiple acknowledgements, the method having the steps of: receiving the downlink MAC PDU requiring multiple acknowledgements; and utilizing a differentiating factor and acknowledgement scheme, sending the multiple acknowledgements.
    Type: Application
    Filed: December 15, 2017
    Publication date: May 10, 2018
    Applicant: BlackBerry Limited
    Inventors: Takashi Suzuki, Zhijun Cai, James Earl Womack
  • Method and system for data-driven, variable-rate, channel quality indicator for LTE non-real-time bursty traffic
    Patent number: 9941997
    Abstract: A method and system, in a long term evolution architecture utilizing adaptive modulation and coding requiring periodic channel quality indication reports, the method having the steps of: waiting for an idle channel indication; and upon detection of the idle channel indication, decreasing the rate of periodic channel quality indication reports.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: April 10, 2018
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, James Earl Womack
  • System and method for relay node selection
    Patent number: 9923628
    Abstract: A method for recommending a relay node to which a user agent attaches. The method includes recommending the relay node based on a relay node selection rank.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: March 20, 2018
    Assignee: BlackBerry Limited
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • System and method for semi-persistent and dynamic scheduling and discontinuous reception control
    Patent number: 9854522
    Abstract: Methods of combining semi-persistent resource allocation and dynamic resource allocation are provided. Packets, such as VoIP packets, are transmitted on the uplink and downlink using respective semi-persistent resources. For each mobile device, awake periods and sleep periods are defined. The semi-persistent resources are aligned with the awake periods so that most of the time the mobile device can turn off its wireless access radio during the sleep periods. In addition, signalling to request, and to allocate, resources for additional packets are transmitted during the awake periods, and the resources allocated for the additional packets are within the awake windows.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: December 26, 2017
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, James Earl Womack
  • System and Method for Uplink Timing Synchronization in Conjunction with Discontinuous Reception
    Publication number: 20170303198
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 19, 2017
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • System and Method for Uplink Timing Synchronization in Conjunction with Discontinuous Reception
    Publication number: 20170303200
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 19, 2017
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • System and Method for Uplink Timing Synchronization in Conjunction with Discontinuous Reception
    Publication number: 20170303335
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 19, 2017
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • System and Method for Uplink Timing Synchronization in Conjunction with Discontinuous Reception
    Publication number: 20170303197
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 19, 2017
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • System and Method for Uplink Timing Synchronization in Conjunction with Discontinuous Reception
    Publication number: 20170303199
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 19, 2017
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • System and Method for Uplink Timing Synchronization in Conjunction with Discontinuous Reception
    Publication number: 20170288826
    Abstract: Systems and methods for controlling sounding reference signal transmission are provided; a user equipment starts transmitting the sounding reference signal in anticipation of uplink data transmission, and then discontinues transmitting the sounding reference signal after completion of uplink data transmission.
    Type: Application
    Filed: February 10, 2017
    Publication date: October 5, 2017
    Applicant: BlackBerry Limited
    Inventors: James Earl WOMACK, Zhijun Cai
  • System and method for uplink timing synchronization in conjunction with discontinuous reception
    Patent number: 9730266
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: August 8, 2017
    Assignee: GOLDEN VALLEY HOLDINGS LIMITED
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • Method and apparatus for wireless emergency alerts
    Patent number: 9654953
    Abstract: A method at a mobile device, including receiving, at the mobile device, an emergency alert message from a base station; determining a response is required for the emergency alert message; and sending the response to the base station.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: May 16, 2017
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Shalini Suresh Periyalwar, James Earl Womack, Zhijun Cai
  • System and method for uplink timing synchronization in conjunction with discontinuous reception
    Patent number: 9578610
    Abstract: Systems and methods for controlling sounding reference signal transmission are provided; a user equipment starts transmitting the sounding reference signal in anticipation of uplink data transmission, and then discontinues transmitting the sounding reference signal after completion of uplink data transmission.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: February 21, 2017
    Assignee: BlackBerry Limited
    Inventors: James Earl Womack, Zhijun Cai
  • System and method for multi-user multiplexing
    Patent number: 9571179
    Abstract: A relay node is described herein, the relay node comprising a network connectivity device configured to receive a plurality of medium access control layer (MAC) packet data units (PDUs) from a plurality of user agents; a processor configured to multiplex the plurality of MAC PDUs to form a Super-MAC PDU; and wherein the network connectivity device is further configured to transmit the Super-MAC PDU to an access node.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: February 14, 2017
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, James Earl Womack, Zhijun Cai
  • SYSTEM AND METHOD FOR DRX CONTROL AND NACK/ACK
    Publication number: 20170034759
    Abstract: Methods of combining semi-persistent resource allocation and dynamic resource allocation are provided. Packets, such as VoIP packets, are transmitted on the uplink and downlink using respective semi-persistent resources. For each mobile device, awake periods and sleep periods are defined. The semi-persistent resources are aligned with the awake periods so that most of the time the mobile device can turn off its wireless access radio during the sleep periods. In addition, signalling to request, and to allocate, resources for additional packets are transmitted during the awake periods, and the resources allocated for the additional packets are within the awake windows.
    Type: Application
    Filed: June 13, 2013
    Publication date: February 2, 2017
    Inventors: Zhijun Cai, James Earl Womack