| 摘要 |
Methods and apparatus are presented for dynamically controlling the re-transmission scheme of acknowledgment signals. A source transmits a first data packet over a slot s<SUB>1</SUB>. If channel conditions are favorable, source transmits a second data packet over slot s<SUB>2</SUB>, which precedes the reception of any acknowledgment signals. A destination receives first data packet over slot d<SUB>1 </SUB>and second data packet over slot d<SUB>2</SUB>. Destination decodes first data packet during slots d<SUB>2 </SUB>and d<SUB>3</SUB>, and second data packet over slots d<SUB>3 </SUB>and d<SUB>4</SUB>. Destination transmits an acknowledgment signal (ACK 1 ) associated with first data packet during slot d<SUB>4</SUB>. Rather then transmitting the second ACK 1 associated with first data packet over slot d<SUB>5</SUB>, destination preempts this slot with an acknowledgment signal ACK 2 , which is associated with second data packet transmitted by source. Hence, destination is configured to overwrite the repetition of a previous acknowledgment in order to transmit a new acknowledgment.
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