Patents by Inventor Akira Ohshima

Akira Ohshima 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).

  • MOBILE COMMUNICATION DEVICE, BASE STATION DEVICE, RADIO CONTROL METHOD, AND MOBILE COMMUNICATION SYSTEM
    Publication number: 20100310005
    Abstract: A mobile communication device includes a plurality of antennas which transmits and receives a radio signal, and a baseband processor which selects a transmission antenna used for data signal transmission from the plurality of antennas based on an instruction from a base station device and transmits a data signal using the transmission antenna, wherein the baseband processor determines a timing when a reference signal is transmitted using a standby antenna not used for data signal transmission based on the likelihood of the transmission antenna being switched and transmits the reference signal based on the determined timing.
    Type: Application
    Filed: February 2, 2009
    Publication date: December 9, 2010
    Inventors: Yuhsuke Takagi, Keiji Hikoso, Mitsuru Sakamoto, Tadashi Shimonabe, Akira Ohshima
  • RADIO COMMUNICATION SYSTEM, RECEPTION DEVICE, MOBILE STATION DEVICE, TRANSMISSION DEVICE, BASE STATION DEVICE, TRANSMISSION/RECEPTION DEVICE CONTROL METHOD, AND TRANSMISSION/RECEPTION DEVICE CONTROL PROGRAM
    Publication number: 20100291918
    Abstract: A radio communication system includes transmission/reception devices which perform communication by dynamically switching a first transmission mode and a second transmission mode having a lower quality than the first transmission mode, wherein the transmission/reception devices have a transmission mode decision means which fixes a transmission mode upon communication to the first transmission mode for a given period of time.
    Type: Application
    Filed: January 16, 2009
    Publication date: November 18, 2010
    Inventors: Shigeto Suzuki, Keiji Hikoso, Mitsuru Sakamoto, Yuhsuke Takagi, Tadashi Shimonabe, Akira Ohshima