Patents by Inventor Jim Chao

Jim Chao 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 for improved frequency division duplex operation in a wireless communications system
    Publication number: 20070104133
    Abstract: In a frequency division duplex wireless communications system, the wireless network independently and separately assigns RL and FL carrier frequencies to a mobile station, thereby supporting a variable duplex frequency separation. The assigned RL and FL carrier frequencies can be within the same frequency segment, in different frequency segments within a band class, or can be in different band classes. This feature is supported by new channel mapping and signaling.
    Type: Application
    Filed: November 10, 2005
    Publication date: May 10, 2007
    Inventors: Jim Chao, Subramanian Vasudevan, Jialin Zou