BASE STATION UNIT, MOBILE COMMUNICATION SYSTEM AND TRANSMISSION POWER CONTROL METHOD

• Main Authors: TAKEUCHI YOSHIO, SUZUKI TOSHINORI, SAITO JOICHI, ISHIDA YUJI, TSUBAKI NAOKI, ARAIDA OSAMU, NAKAHARA SHIGETO
• Format: Patent
• Language: English
• Published: 14.09.2001
• Edition: 7
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MULTIPLEX COMMUNICATION; TRANSMISSION; WIRELESS COMMUNICATIONS NETWORKS

PROBLEM TO BE SOLVED: To provide a base station unit that can enhance an interference elimination effect and control transmission power with few processing delays, and to provide a mobile wireless system and a transmission power control method. SOLUTION: The cellular mobile communication system, having an interference eliminating function, is provided with a means 14 that measures an SIR of a received signal, whose interference is eliminated by a per-stage interference elimination reception circuit 120a in an interference elimination receiving section 12 of the wireless base station unit and a received signal, whose interference is eliminated by a post-stage interference elimination circuit 120n, with a means 15 that calculates a corrected SIR on the basis of the obtained SIR for estimating a transmission power control SIR on the basis of a current 1st stage SIR and a past corrected SIR, and with a means 16, that compares the transmission power SIR with an object SIR to generate a transmission power control signal. Transmitting the signal to a mobile terminal can control the transmission power of the mobile terminal. This, the transmission power control taking the interference elimination effect into account can be realized with only a processing delay corresponding to one stage of the interference elimination circuit.