A wireless data discarding request is transmitted by a first station to a second
station for requesting the second station to discard at least a layer 2 service
data unit (SDU). A layer 2 data discard acknowledgment protocol data unit
(PDU) is generated by the second station. The layer 2 data discard acknowledgment
PDU has a first field that enables the first station to determine the SDUs actually
discarded by the second station. The layer 2 data discard acknowledgment
PDU is then transmitted to the first station. The first field may contain the discard
indication of each requested discarding SDU, the number of SDUs discarded by the
second station, the number of SDU-terminating PDUs discarded, or the total number
of PDUs discarded.
