METHOD FOR SELECTIVELY DISCARDING DATA UNITS IN A RADIO COMMUNICATION SYSTEM

摘要

A sending node for transmitting data units over a radio interface to a receiving node is provided. Each data unit to be transmitted is associated with a sequence number. The method comprises the step of transmitting a stream of data units over the radio interface (115) to the receiving node (120). Each data unit is associated with a sequence number. The further step of selectively discarding a first data unit from the transmission window, which first data unit is associated with a first sequence number (SN4), and informing the receiving node (120) that first data unit associated with the first sequence number (SN4) is discarded, so that a gap in the in the associated sequence numbers of the stream of transmitted data units can be ignored by the receiving node (120).