SYSTEM FOR TRANSMITTING ACK/NACK

摘要

PURPOSE: A system for transmitting an ACK/NACK message is provided to reduce delay time from the time of receiving data from a terminal from the time of transmitting an ACK(Acknowledgement) message to the terminal. CONSTITUTION: A transmission unit(110) transmits data to a serving BS(Base Station)(130) and a cooperative BS(140) adjacent to the service BS, and a reception unit(120) receives from the server BS the information on the data reception success of a serving BS. A reception unit(120) receives the information on the data reception success from the serving BS. The reception unit receives from the cooperative BS the information on the data reception success of the cooperative BS. Based on the data reception success, the transmission unit retransmits the data to the serving BS and the cooperative BS.