Patents by Inventor James E. Womack

James E. 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).

  • Patent number: 8743795
    Abstract: A method is provided for improving reliability in detection of an identifier for a user agent is provided. The method includes the user agent attempting to decode semi-persistent scheduling activation/reconfiguration signaling over a physical downlink control channel only during a discontinuous reception (DRX) on-duration.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: June 3, 2014
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, James E. Womack, Zhijun Cai
  • Patent number: 8687528
    Abstract: A network arrangement comprising a relay node (RN), wherein the RN is configured to assign a plurality of resource blocks (RBs) allocated by an enhanced node B (ENB) for at least one user equipment (UE). A network comprising an ENB, wherein the ENB is configured to allocate a plurality of RBs for an RN, wherein the RBs are assigned for at least one UE. Also disclosed is a method for communicating in a network, comprising selecting a time-division (TD) communication mode, and using resource scheduling based on the selected TD communication mode.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: April 1, 2014
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, James E. Womack, Yi Yu
  • Patent number: 8611221
    Abstract: A method is provided for improving reliability in semi-persistent scheduling activation/reactivation is provided. The method includes a user agent receiving a first data element from an access device specifying at least one first transport block size. The method further includes the user agent deriving a second transport block size based on a second data element received from the access device. The method further includes the user agent comparing the first transport block size with the second transport block size. The method further includes, when the first transport block size differs from the second transport block size, the user agent ignoring the received semi-persistent scheduling activation/reactivation data.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: December 17, 2013
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, James E. Womack, Yi Yu, Richard Charles Burbidge, Gordon Peter Young, Takashi Suzuki
  • Patent number: 8565242
    Abstract: A method for communicating in a telecommunications system is provided. The method comprises conveying a downlink bit rate and an uplink bit rate associated with an access point name to a user agent.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: October 22, 2013
    Assignee: BlackBerry Limited
    Inventors: Wei Wu, James E. Womack, Bruno Richard Preiss, Xinhua Ling
  • Patent number: 8300608
    Abstract: A method for communicating is provided. The method comprises communicating regarding transmission time interval (TTI) bundling related to one or more random access (RA) messages.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: October 30, 2012
    Assignee: Research In Motion Limited
    Inventors: Yi Yu, James E. Womack, Zhijun Cai
  • Publication number: 20120244872
    Abstract: A method is provided for improving reliability in semi-persistent scheduling activation/reactivation is provided. The method includes a user agent receiving a first data element from an access device specifying at least one first transport block size. The method further includes the user agent deriving a second transport block size based on a second data element received from the access device. The method further includes the user agent comparing the first transport block size with the second transport block size. The method further includes, when the first transport block size differs from the second transport block size, the user agent ignoring the received semi-persistent scheduling activation/reactivation data.
    Type: Application
    Filed: June 5, 2012
    Publication date: September 27, 2012
    Applicant: Research In Motion Limited
    Inventors: Zhijun Cai, James E. Womack, Yi Yu, Richard Charles Burbidge, Gordon Peter Young, Takashi Suzuki
  • Patent number: 8230291
    Abstract: A method for assigning hybrid automatic repeat request (HARQ) process ID is provided. The method includes, when a retransmission associated with a first initial semi -persistent scheduling (SPS) transmission having a first HARQ process ID is expected to occur after a second initial transmission previously configured with SPS resource, explicitly assigning a second HARQ process ID to the second initial transmission wherein the second HARQ process ID is different from the first HARQ process ID.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: July 24, 2012
    Assignee: Research In Motion Limited
    Inventors: Zhijun Cai, Yi Yu, James E. Womack
  • Patent number: 8223646
    Abstract: A method is provided for improving reliability in semi-persistent scheduling activation/reactivation is provided. The method includes a user agent receiving a first data element from an access device specifying at least one first transport block size. The method further includes the user agent deriving a second transport block size based on a second data element received from the access device. The method further includes the user agent comparing the first transport block size with the second transport block size. The method further includes, when the first transport block size differs from the second transport block size, the user agent ignoring the received semi-persistent scheduling activation/reactivation data.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: July 17, 2012
    Assignee: Research In Motion Limited
    Inventors: Zhijun Cai, James E. Womack, Yi Yu, Richard Charles Burbidge, Gordon Peter Young, Takashi Suzuki
  • Publication number: 20120113979
    Abstract: Systems and methods for performing MCS adaptation are provided. In some cases, the network performs MCS adaptation based on received NACKs. In other cases, the mobile station determines an MCS based on channel quality measurements, and feeds back the MCS adaptation decision to the network. In either case, NACK-only feedback may be implemented to reduce interference.
    Type: Application
    Filed: January 12, 2012
    Publication date: May 10, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Zhijun Cai, James E. Womack, Wei WU
  • Patent number: 8098601
    Abstract: Systems and methods for performing MCS adaptation are provided. In some cases, the network performs MCS adaptation based on received NACKs. In other cases, the mobile station determines an MCS based on channel quality measurements, and feeds back the MCS adaptation decision to the network. In either case, NACK-only feedback may be implemented to reduce interference.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: January 17, 2012
    Assignee: Research In Motion Limited
    Inventors: Zhijun Cai, James E. Womack, Wei Wu
  • Publication number: 20100110989
    Abstract: A method for communicating in a telecommunications system is provided. The method comprises conveying a downlink bit rate and an uplink bit rate associated with an access point name to a user agent.
    Type: Application
    Filed: November 3, 2009
    Publication date: May 6, 2010
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Wei Wu, James E. Womack, Bruno Richard Preiss, Xinhua Ling
  • Publication number: 20100110942
    Abstract: A network arrangement comprising a relay node (RN), wherein the RN is configured to assign a plurality of resource blocks (RBs) allocated by an enhanced node B (ENB) for at least one user equipment (UE). A network comprising an ENB, wherein the ENB is configured to allocate a plurality of RBs for an RN, wherein the RBs are assigned for at least one UE. Also disclosed is a method for communicating in a network, comprising selecting a time-division (TD) communication mode, and using resource scheduling based on the selected TD communication mode.
    Type: Application
    Filed: November 2, 2009
    Publication date: May 6, 2010
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Zhijun Cai, James E. Womack, Yi Yu
  • Publication number: 20100074206
    Abstract: A method is provided for improving reliability in detection of an identifier for a user agent is provided. The method includes the user agent attempting to decode semi-persistent scheduling activation/reconfiguration signaling over a physical downlink control channel only during a discontinuous reception (DRX) on-duration.
    Type: Application
    Filed: September 18, 2009
    Publication date: March 25, 2010
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Yi Yu, James E. Womack, Zhijun Cai
  • Publication number: 20100075691
    Abstract: A method is provided for improving reliability in semi-persistent scheduling activation/reactivation is provided. The method includes a user agent receiving a first data element from an access device specifying at least one first transport block size. The method further includes the user agent deriving a second transport block size based on a second data element received from the access device. The method further includes the user agent comparing the first transport block size with the second transport block size. The method further includes, when the first transport block size differs from the second transport block size, the user agent ignoring the received semi-persistent scheduling activation/reactivation data.
    Type: Application
    Filed: September 18, 2009
    Publication date: March 25, 2010
    Inventors: Zhijun Cai, James E. Womack, Yi Yu, Richard Charles Burbidge, Gordon Peter Young, Takashi Suzuki
  • Publication number: 20100067501
    Abstract: A method for communicating is provided. The method comprises communicating regarding transmission time interval (TTI) bundling related to one or more random access (RA) messages.
    Type: Application
    Filed: September 11, 2009
    Publication date: March 18, 2010
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Yi Yu, James E. Womack, Zhijun Cai
  • Publication number: 20100031111
    Abstract: A method for assigning hybrid automatic repeat request (HARQ) process ID is provided. The method includes, when a retransmission associated with a first initial semi-persistent scheduling (SPS) transmission having a first HARQ process ID is expected to occur after a second initial transmission previously configured with SPS resource, explicitly assigning a second HARQ process ID to the second initial transmission wherein the second HARQ process ID is different from the first HARQ process ID.
    Type: Application
    Filed: August 4, 2009
    Publication date: February 4, 2010
    Inventors: Zhijun Cai, Yi Yu, James E. Womack
  • Publication number: 20100017671
    Abstract: A method is provided for associating initial transmissions and retransmissions. The method includes determining a HARQ process ID for the initial transmission based upon a system frame number, a subframe number, a period associated with the initial transmission and/or a number of reserved HARQ process IDs. The method further includes associating the initial transmission with a retransmission based upon the HARQ process ID.
    Type: Application
    Filed: July 17, 2009
    Publication date: January 21, 2010
    Applicant: Research In Motion Limited
    Inventors: Zhijun Cai, Yi Yu, James E. Womack
  • Publication number: 20080232301
    Abstract: Systems and methods for performing MCS adaptation are provided. In some cases, the network performs MCS adaptation based on received NACKs. In other cases, the mobile station determines an MCS based on channel quality measurements, and feeds back the MCS adaptation decision to the network. In either case, NACK-only feedback may be implemented to reduce interference.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 25, 2008
    Inventors: Zhijun Cai, James E. Womack, Wei Wu
  • Patent number: 7397775
    Abstract: A communication unit (CU) (109, 111) network controller (113) and corresponding methods (603-609) are described that facilitate selectively routing calls. The CU includes a transceiver (403) suitable to support an air interface with a local area network (LAN) (101) and with a wide area network (WAN) (105) and a controller (405) that is coupled to and controlling the transceiver. These are each and collectively configured to determine when a bearer leg within the WLAN will not support a call attempt over the bearer leg and responsive to so determining, initiate the call over another bearer leg, e.g. within the LAN or the WAN. The determining includes, for example, receiving a message (703, 707, 713) that indicates or implies that the call can not be supported.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: July 8, 2008
    Assignee: Motorola, Inc.
    Inventors: James E. Womack, Jheroen P. Dorenbosch, Niranjan N. Segal
  • Patent number: 7301914
    Abstract: An access point (102) conveys (202) to communication units (104) of a plurality of multicast groups, a first indication that the access point supports a method for sending a multicast message. The access point receives (204) a multicast message directed to a receiving one of the plurality of multicast groups, and determines (206) that the communication units belonging to the receiving one of the plurality of multicast groups also support the method. The access point signals (208) a second indication to selectively awaken the communication units belonging to the receiving one of the plurality of multicast groups, and transmits (210) the multicast message to the receiving one of the plurality of multicast groups in a manner that allows (212) at least one communication unit not belonging to the receiving one of the plurality of multicast groups to remain asleep during the transmitting.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: November 27, 2007
    Assignee: Motorola, Inc.
    Inventors: Niranjan N. Segal, Jheroen P. Dorenbosch, James E. Womack, Peter M. Drozt