Method for transmitting data block with different discard condition

A data block transmission method in accordance with different discard conditions is provided to be capable of transmitting data blocks as applying different discard conditions according to types of each data block, thereby selectively controlling QoS(Quality of Service) according to data importance. Discard conditions are set according to types of data blocks(S110). An RRC(Radio Resource Control) layer delivers information on data block type information and the discard conditions to a wireless protocol layer(S120). An RLC(Radio Link Control) layer transmits the data blocks(S130). If transmission of the data blocks fails, it is decided whether the discard conditions are satisfied(S150). If so, the data blocks are discarded(S160).