Patents by Inventor Mark W Cheng

Mark W Cheng 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: 7903610
    Abstract: A method for providing a reverse link handoff mechanism includes, with respect to communication between a mobile station and a first cell, initiating a start of a cell switch delay by transmitting a request that a new data channel be established with a second cell. The method further includes communicating with the first cell during the cell switch delay and upon an end of the cell switch delay, switching data transmission to the second cell. The cell switch delay is a time interval extending from a time that the request is transmitted until startig of reception of data packets via the new data channel by the second cell. The application of the cell switch delay is determined based on a location of the first cell and the second cell.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: March 8, 2011
    Assignee: Nokia Corporation
    Inventors: Mark W Cheng, Liangchi (Alan) Hsu
  • Patent number: 6226301
    Abstract: A method and apparatus for segmentation and assembly of data frames for retransmission in a telecommunications system. Zero padding of radio link protocol (RLP) data frames carrying retransmissions is minimized. RLP data frames carrying retransmitted data of an RLP data frame may also carry at least one newly transmitted RLP data frame or at least one other complete or partial retransmitted RLP data frame. The RLP data frames are passed to a lower level protocol and transmitted in at least one transmission frame.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: May 1, 2001
    Assignee: Nokia Mobile Phones Ltd
    Inventors: Mark W Cheng, Zhi-Chun Honkasalo
  • Patent number: 6189122
    Abstract: A method and apparatus for controlling a retransmission in a telecommunications system. A pointer, V(P), that points to the upper bound of retransmitted data frames in a receiver buffer is introduced. A list includes at least one entry indicating a missed data frame for which a retransmission request has been transmitted. The entry is associated with a retransmission/abort timer that is started upon transmission of the retransmission request for the data frame. Once a retransmission timer is started, any received data frame type, whether valid or not, is counted in the incrementation of the retransmission/abort timer for an unreceived data frame. However, if the received data frame is not a valid data frame, any expiration action on the retransmission/abort timer is disabled. Also, anytime any valid frame is received, an expiration action may be taken on the retransmission timer of unreceived data frames having a sequence number less than V(P).
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: February 13, 2001
    Assignee: Nokia Mobile Phones Ltd
    Inventor: Mark W Cheng
  • Patent number: 6076181
    Abstract: A method and apparatus for controlling a retransmission/abort timer in a telecommunications system. A pointer, V(P), that points to the upper bound of retransmitted data frames in a receiver buffer is introduced. A list includes at least one entry indicating a missed data frame for which a retransmission request has been transmitted. The entry is associated with a retransmission/abort timer that is started upon transmission of the retransmission request for the data frame. Once a retransmission timer is started, any received data frame type, whether valid or not, is counted in the incrementation of the retransmission/abort timer for an unreceived data frame. However, if the received data frame is not a valid data frame, any expiration action on the retransmission/abort timer is disabled. Also, anytime any valid frame is received, an expiration action may be taken on the retransmission timer of unreceived data frames having a sequence number less than V(P).
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: June 13, 2000
    Assignee: Nokia Mobile Phones Limited
    Inventor: Mark W Cheng