Methods and apparatus are provided for modulating ACK/NACK persistence to
improve data traffic performance. In one implementation, a method for
control of automatic repeat requests between a transmitting terminal
(102) and a receiving terminal (104) comprises: defining (1404) a buffer
window of a buffer, the window to buffer multiple higher layer data
blocks each segmented into multiple physical layer data blocks, the
window beginning at a current higher layer block in which at least one
physical layer block has not been received; obtaining (1406) an
indication of whether physical layer blocks are completely received;
determining (1408), based on the obtaining step, that a subsequent higher
layer block within the window has been completely received; and
discarding (1410) the current higher layer block when a time delay of the
current higher layer block exceeds an estimate of a delay tolerance
corresponding to a higher layer application.