Patents by Inventor Shihuan Liu

Shihuan Liu 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: 9198195
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be configured to determine a plurality of slots for transmitting information including a plurality of first type slots and a plurality of second type slots where the second type slots have a longer duration that the first type slots. The apparatus may be configured to transmit information in a first type slot when a previous reception was successful and there is no other transmission expected to occur during a gap preceding the first type slot and during the first type slot. Additionally or in the alternative, apparatus may be configured to transmit information in a second type slot when at least one of the previous reception was unsuccessful or there is another transmission expected to occur during a gap preceding the first type slot or during the first type slot.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: November 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Xinzhou Wu, Sundar Subramanian, Shihuan Liu
  • Patent number: 9049733
    Abstract: Methods and apparatus for use in a wireless system are described where initiation of packet transmission is constrained in accordance to control actual packet transmission in a manner that reduces contention and possible collisions beyond that provided by lower layer resource contention mechanisms, e.g., 802.11 carrier sensing and/or transmission back-off timing mechanisms. Through higher level, e.g., MAC constraints, on packet transmission initiation, an air interface which employs carrier sensing can be used and controlled in a manner which reduces collisions and interference in applications where small packets, e.g., packets which can be transmitted in a fraction of the maximum permitted transmission time. The methods allow small packets in such systems to be transmitted on a periodic or semi-periodic basis in many cases.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: June 2, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Sundar Subramanian, Shihuan Liu, Xinzhou Wu, Thomas J. Richardson, Junyi Li
  • Publication number: 20130195082
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be configured to determine a plurality of slots for transmitting information including a plurality of first type slots and a plurality of second type slots where the second type slots have a longer duration that the first type slots. The apparatus may be configured to transmit information in a first type slot when a previous reception was successful and there is no other transmission expected to occur during a gap preceding the first type slot and during the first type slot. Additionally or in the alternative, apparatus may be configured to transmit information in a second type slot when at least one of the previous reception was unsuccessful or there is another transmission expected to occur during a gap preceding the first type slot or during the first type slot.
    Type: Application
    Filed: August 3, 2012
    Publication date: August 1, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Xinzhou Wu, Sundar Subramanian, Shihuan Liu
  • Publication number: 20130010774
    Abstract: Methods and apparatus for use in a wireless system are described where initiation of packet transmission is constrained in accordance to control actual packet transmission in a manner that reduces contention and possible collisions beyond that provided by lower layer resource contention mechanisms, e.g., 802.11 carrier sensing and/or transmission back-off timing mechanisms. Through higher level, e.g., MAC constraints, on packet transmission initiation, an air interface which employs carrier sensing can be used and controlled in a manner which reduces collisions and interference in applications where small packets, e.g., packets which can be transmitted in a fraction of the maximum permitted transmission time. The methods allow small packets in such systems to be transmitted on a periodic or semi-periodic basis in many cases.
    Type: Application
    Filed: July 5, 2012
    Publication date: January 10, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Sundar Subramanian, Shihuan Liu, Xinzhou Wu, Thomas J. Richardson, Junyi Li