Patent Number: 8,818,443

Title: Base station and cellular wireless communication system

Abstract: A femtocell base station collects the terminal distribution within the cell and selects terminals to represent the cell-center and the cell-edge from among the terminals within the cell. The femtocell base station also calculates maximum transmit power for the respective the cell-center and cell-edge terminals allowable by the macrocell base station. The femtocell base station sets the respective transmit power of the cell-center and the cell-edge in a range that will not exceed the maximum transmit power, adjusts the transmit power control parameter to allow control by the terminal at the power value that was set, and notifies the terminal. Communication with high throughput can in this way be attained for terminals in cells within the femtocell base station during uplink communications to the femtocell base station, and interference applied to the terminals in the macrocell base station can be suppressed.

Inventors: Yamamoto; Tomonori (Fujisawa, JP), Katayama; Rintaro (Fujisawa, JP), Ishii; Hirotake (Yokohama, JP)

Assignee: Hitachi, Ltd.

International Classification: H04B 1/00 (20060101); H04B 15/00 (20060101); H04W 72/00 (20090101); H04B 7/00 (20060101); H04B 7/185 (20060101); H04B 7/204 (20060101); H04B 7/216 (20060101); H04K 1/10 (20060101); H04L 27/28 (20060101); H04L 27/00 (20060101); H04L 27/06 (20060101)

Expiration Date: 8/26/12018