Patents by Inventor Yasushi Shiina

Yasushi Shiina 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).

  • Slots assignment method for control channel signal in mobile telecommunication system and base station employing the slots assignment method
    Patent number: 5732073
    Abstract: A slots assignment method for a control channel signal in a mobile telecommunication system employing a time division multiple access/time division duplex (TDMA-TDD) system having a plurality of base stations each having at least one mobile station. Each of the base stations detects a control-channel signal transmitted from other base stations and a control-channel signal transmitted from the mobile station throughout a plurality of multiple frame periods, discriminates down-link control-channel slots from up-link control-channel slots being used by other base stations, selects, as optimum down-link control-channel slot candidates, ones of idle slots of idle slot blocks other than the down and up-link control-channel slots being used by other base stations with use of a predetermined evaluation function, and assigns one of the selected idle slots as a down-link control-channel slot of its own base station.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: March 24, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Tsutomu Kusaki, Yasushi Shiina, Takeshi Maki