Patents by Inventor Xiao C. Bernstein

Xiao C. Bernstein 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).

  • Methods and apparatus for inter-frequency handoff in a wireless communication system
    Patent number: 6574203
    Abstract: Inter-frequency handoffs in a CDMA or other wireless communication system are controlled using a noise-limited coverage trigger metric which is able to distinguish between same-frequency cell boundaries and other-frequency cell boundaries in the system. The trigger metric may be generated as a function of an average signal-to-noise measure for pilot signals received at a mobile station of the system and a linear sum of the signal-to-noise measures. The signal-to-noise measures may be generated in the mobile station and included in messages transmitted from the mobile station to one or more base stations of the system. The trigger metric is used to control a handoff from a current frequency to a new frequency in an ongoing call. The trigger metric may alternatively be based on a measure of mobile receive power alone.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: June 3, 2003
    Assignee: Lucent Technologies Inc.
    Inventors: Neil E. Bernstein, Xiao C. Bernstein, Wen-Yi Kuo, Martin H. Meyers, Xiao Wang, Carl F. Weaver
  • Methods and apparatus for inter-frequency handoff in a wireless communication system
    Publication number: 20020027890
    Abstract: Inter-frequency handoffs in a CDMA or other wireless communication system are controlled using a noise-limited coverage trigger metric which is able to distinguish between same-frequency cell boundaries and other-frequency cell boundaries in the system. The trigger metric may be generated as a function of an average signal-to-noise measure for pilot signals received at a mobile station of the system and a linear sum of the signal-to-noise measures. The signal-to-noise measures may be generated in the mobile station and included in messages transmitted from the mobile station to one or more base stations of the system. The trigger metric is used to control a handoff from a current frequency to a new frequency in an ongoing call. The trigger metric may alternatively be based on a measure of mobile receive power alone.
    Type: Application
    Filed: June 25, 2001
    Publication date: March 7, 2002
    Applicant: Lucent Technologies Inc.
    Inventors: Neil E. Bernstein, Xiao C. Bernstein, Wen-Yi Kuo, Martin H. Meyers, Xiao Wang, Carl F. Weaver
  • Methods and apparatus for interfrequency handoff in a wireless communication system
    Patent number: 6252861
    Abstract: Inter-frequency handoffs in a CDMA or other wireless communication system are controlled using a noise-limited coverage trigger metric which is able to distinguish between same-frequency cell boundaries and other-frequency cell boundaries in the system. The trigger metric may be generated as a function of an average signal-to-noise measure for pilot signals received at a mobile station of the system and a linear sum of the signal-to-noise measures. The signal-to-noise measures may be generated in the mobile station and included in messages transmitted from the mobile station to one or more base stations of the system. The trigger metric is used to control a handoff from a current frequency to a new frequency in an ongoing call. The trigger metric may alternatively be based on a measure of mobile receive power alone.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: June 26, 2001
    Assignee: Lucent Technologies, Inc.
    Inventors: Neil E. Bernstein, Xiao C. Bernstein, Wen-Yi Kuo, Martin H. Meyers, Xiao Wang, Carl F. Weaver