Mobile communication system, signal transmission system, and base station

移動体通信システム、信号伝送システム及び基地局

Abstract

PROBLEM TO BE SOLVED: To achieve fairness between users by temporarily enhancing transmission bandwidth of a low traffic user/terminal.SOLUTION: A demodulator (62) of a mobile terminal (12-1) measures an SINR (signal to interference plus noise ratio) of a downlink signal from a base station (10), and supplies the measured SINR value to a controller (50). The controller (50) calculates the required target transmission power from the SINR value, and transmits it to the base station (10) over the uplink. A correction value calculation device (34-1) of the base station (10) monitors downlink data Dd(1) for the mobile terminal (12-1) to measure the traffic, and outputs to a controller (20) a power correction value according to the traffic. The controller (20) controls the transmission power of an RF transmitter (24) according to the result that is obtained by correcting the target transmission power included in a transmission condition request signal from the mobile terminal (12-1) using the power correction value.
【課題】 低トラフィックのユーザ/端末の送信帯域を一時的に増強することで、ユーザ間の公平を実現する。 【解決手段】 移動端末(12−1)の復調装置(62)は、基地局(10)からの下り信号のSINR(信号対干渉雑音比)を計測し、計測したSINR値を制御装置(50)に供給する。制御装置(50)は、SINR値から必要な目標送信電力を算定し、上りリンクを使って基地局(10)に送信する。基地局(10)の補正値算出装置(34−1)は、移動端末(12−1)向けの下りデータDd(1)をモニタしてトラフィック量を計測し、トラフィック量に応じた電力補正値を制御装置(20)に出力する。制御装置(20)は、移動端末(12−1)からの送信条件要求信号に含まれる目標送信電力を電力補正値で補正した結果にRF送信装置(24)の送信電力を制御する。 【選択図】 図1

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