Patents by Inventor Hamabe Kojiro

Hamabe Kojiro 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 allocating frequency carrier in cellular system
    Patent number: 6356540
    Abstract: A frequency carrier allocating method is provided which can effectively utilize frequency carriers when the traffic of the uplink is asymmetric to that of the downlink in the FDD cellular system. Plural frequency carriers are arranged in each of two frequency bands FB1 and FB2. Base stations are divided into two groups BSG1 and BSG2. In the group BSG1, frequency carriers in the frequency band FB1 are allocated to the downlink of a base station while frequency carriers in the frequency band FB2 are allocated to the uplink thereof. In the group BSG2, frequency carriers in the frequency band FB2 are allocated to the downlink of a base station while frequency carriers in the frequency band FB1 are allocated to the uplink thereof. Bi-directional communication is performed between the base station and a mobile station using the frequency of the frequency carrier.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: March 12, 2002
    Assignee: NEC Corporation
    Inventor: Hamabe Kojiro