Patent ID: 7035894

Claim:
A method for retransmitting data between two sides including a reception side and a transmission side in a mobile communication system including one or more mobile stations and one or more radio networks, the method comprising the steps of: a) at the reception side, storing data received from the transmission side in a first storage unit; b) as a result of an error-checking procedure, if the data is erroneous, requesting the transmission side to retransmit the data; c) at the transmission side, transmitting to the reception side first information related to retransmission and then retransmitting the requested data, wherein the first information includes information about when the transmission side will retransmit the requested data to the reception side; d) at a combining unit at the reception side, combining the retransmitted data with the data stored in the first storage unit; e) if the combined data is not erroneous, clearing the data and the retransmitted data from the first storage unit and transmitting the combined data to a first upper layer included in the reception side; and f) in response to an ACK signal from the reception side representing that normal data has been received, clearing at the transmission side the retransmitted data from a second storage unit.