Downlink transmission power control scheme for mobile communication system using site diversity

• Main Authors: OHNO, KOJI, NAKAMURA, TAKEHIRO, NAKANO, ETSUHIRO, SATO, TAKAAKI
• Format: Patent
• Language: English; French; German
• Published: 22.10.2008
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The present invention relates to a method of downlink transmission power control in a mobile communication system formed by a plurality of base stations (1, 2) and a mobile station (5) to be connected with the base stations (1, 2) via radio channels. Also, the mobile communication system comprises a base station control station (11) for controlling the base stations (1, 2). There is carried out a primary downlink transmission power control using a primary control signal which is transmitted from the mobile station (5) and terminated at each base station (1, 2) in short-time intervals. Also, the base station control station (11) carries out an additional downlink transmission power control using additional control signals which are transmitted in long-time intervals from the base station control station (11) to the base stations (1, 2) during a site diversity period. This allows to maintain a transmission power of each base station (1, 2) at nearly the same level.