Patents by Inventor Li-Fan Zhang

Li-Fan Zhang 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).

  • Method and apparatus for scheduling a controlchannel in an orthogonal frequency division multiplexing communication system
    Patent number: 10003445
    Abstract: A scheduler capable of operating in an Orthogonal Frequency Division Multiplexing communication system schedules a control channel for a user equipment by determining a channel quality metric associated with the user equipment, calculating a target control channel element quality metric, determining a control channel element utilization rate, wherein the control channel element utilization rate a past rate of utilization of control channel elements, and selecting a control channel element aggregation level for the control channel based on the channel quality metric, the target control channel element quality metric, and the control channel element utilization rate. The scheduler then allocates control channel elements to the control channel based on the selected control channel element aggregation level. The scheduler further may steal power from one or more unused control channel elements and assign the stolen power to control channel elements assigned to the control channel.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: June 19, 2018
    Assignee: Google Technology Holdings LLC
    Inventors: Rapeepat Ratasuk, Jiangnan Jason Chen, Li-Fan Zhang
  • METHOD AND APPARATUS FOR SCHEDULING A CONTROLCHANNEL IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM
    Publication number: 20110267967
    Abstract: A scheduler capable of operating in an Orthogonal Frequency Division Multiplexing communication system schedules a control channel for a user equipment by determining a channel quality metric associated with the user equipment, calculating a target control channel element quality metric, determining a control channel element utilization rate, wherein the control channel element utilization rate a past rate of utilization of control channel elements, and selecting a control channel element aggregation level for the control channel based on the channel quality metric, the target control channel element quality metric, and the control channel element utilization rate. The scheduler then allocates control channel elements to the control channel based on the selected control channel element aggregation level. The scheduler further may steal power from one or more unused control channel elements and assign the stolen power to control channel elements assigned to the control channel.
    Type: Application
    Filed: April 30, 2010
    Publication date: November 3, 2011
    Applicant: MOTOROLA, INC.
    Inventors: Rapeepat Ratasuk, Jiangnan Jason Chen, Li-Fan Zhang