Patents by Inventor Shuuji Itou

Shuuji Itou 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 radio communication system
    Patent number: 6937858
    Abstract: A mobile radio communication system which does not need an omnidirectional channel for both a base station and a mobile station to track each other and uses only a narrow beam channel and can reduce a tracking time than before for an adjacent base station and a mobile station to search each other while a visiting area base station and the mobile station are communicating in the overlapped area. The base station and the mobile station comprise a unit for transmitting and receiving in forward or reverse channel, in different frequency, in different tracking channel using a narrow beam. Both the mobile station and the visiting area base station search the location each other, and after searched, they assign the frequency and the beam used in the tracking channel. At the same time, by comprising a searching slot in an information channel to search an adjacent base station while communicating with the visiting area base station, a tracking of other adjacent base station can be performed.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: August 30, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Keijiro Take, Shuuji Itou, Toshiaki Tomisawa
  • Mobile radio communication system
    Publication number: 20020072366
    Abstract: A mobile radio communication system which does not need an omnidirectional channel for both a base station and a mobile station to track each other and uses only a narrow beam channel and can reduce a tracking time than before for an adjacent base station and a mobile station to search each other while a visiting area base station and the mobile station are communicating in the overlapped area. The base station and the mobile station comprise a unit for transmitting and receiving in forward or reverse channel, in different frequency, in different tracking channel using a narrow beam. Both the mobile station and the visiting area base station search the location each other, and after searched, they assign the frequency and the beam used in the tracking channel. At the same time, by comprising a searching slot in an information channel to search an adjacent base station while communicating with the visiting area base station, a tracking of other adjacent base station can be performed.
    Type: Application
    Filed: February 13, 2002
    Publication date: June 13, 2002
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Keijiro Take, Shuuji Itou, Toshiaki Tomisawa
  • Mobile radio communication system
    Patent number: 6370377
    Abstract: A mobile radio communication system which does not need an omnidirectional channel for both a base station and a mobile station to track each other and uses only a narrow beam channel and can reduce a tracking time than before for an adjacent base station and a mobile station to search each other while a visiting area base station and the mobile station are communicating in the overlapped area. The base station and the mobile station comprise a unit for transmitting and receiving in forward or reverse channel, in different frequency, in different tracking channel using a narrow beam. Both the mobile station and the visiting area base station search the location each other, and after searched, they assign the frequency and the beam used in the tracking channel. At the same time, by comprising a searching slot in an information channel to search an adjacent base station while communicating with the visiting area base station, a tracking of other adjacent base station can be performed.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: April 9, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Keijiro Take, Shuuji Itou, Toshiaki Tomisawa