Patents by Inventor Shuji Yasuda

Shuji Yasuda 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).

  • Channel assignment system in mobile communication system
    Patent number: 5140695
    Abstract: In a mobile communication system between a mobile station and a telephone network through a base station which assigns a communication channel so that it satisfies required communication quality or D/U ratio, said base station comprises a moving speed detector (22) for measuring moving speed of the mobile station, and a D/U ratio generator (22A) responsive of output of said moving speed detector (22) for providing said required communication quality. The required communication quality depends upon the moving speed of a mobile station, and a communication channel is selected to be the minimum quality channel as far as it satisfies said required communication quality. Thus, the communication quality is always higher than the requested threshold quality level, and the effective reuse of frequencies is improved.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: August 18, 1992
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Shuji Yasuda, Yoshiaki Nakajima, Seizo Onoe