Data transmitting apparatus and data transmitting method

A mobile station apparatus having a data transmitting apparatus, the data transmitting apparatus comprising:

• despreading means for despreading received data to hold despread data, and combine the held data with retransmitted data subjected to despreading;
• and
• error detecting means for detecting an error of data combined by the despreading means.

A base station apparatus having a data transmitting apparatus, the data transmitting apparatus comprising:

• despreading means for despreading received data to hold despread data, and combine the held data with retransmitted data subjected to despreading;
• and
• error detecting means for detecting an error of data combined by the despreading means.

A data transmitting method wherein a transmitting side spreads and transmits transmission data at a low spreading factor at which a despread signal can little obtain a given quality except when a line condition is in a good condition at a receiving side, and the receiving side despreads received data to hold despread data and performs a data retransmission request to the transmitting side when an error is detected in data obtained by combining the held data with retransmitted data subjected to despreading, and the transmitting side retransmits transmission data when receiving the retransmission request from the receiving side.

A data transmitting method wherein a transmitting side repeats retransmission until no error is detected in received data at a receiving side, and the receiving side holds received data, combines the received data with the held data for each retransmission, and performs error detection in the combined data.