Abstract: A media access controller (MAC) of a broadband wireless communication device may vary the size of data unit payloads based on a physical layer burst size. In automatic retransmission request (ARQ) enabled service flows, the MAC may delay construction of data units from the data unit payloads until after entering an ARQ retransmission request window. In some embodiments, the MAC comprises per-flow schedulers to schedule service data units (SDUs) for each of a plurality of service flows, and per-service flow retransmission request handlers to reconstruct and retransmit data units.

Abstract: A media access controller (MAC) of a broadband wireless communication device may vary the size of data unit payloads based on a physical layer burst size. In automatic retransmission request (ARQ) enabled service flows, the MAC may delay construction of data units from the data unit payloads until after entering an ARQ retransmission request window. In some embodiments, the MAC comprises per-flow schedulers to schedule service data units (SDUs) for each of a plurality of service flows, and per-service flow retransmission request handlers to reconstruct and retransmit data units.

Abstract: A media access controller (MAC) of a broadband wireless communication device generates a data unit payload from fragments of more than one service data unit, constructs an initial data unit from the data unit payload, and combines the initial data unit with data units of another service flow for subsequent transmission. The MAC reconstructs a new data unit when at least a portion of one of the fragments of the initial data unit is not acknowledged as being received. In some embodiments, the new data unit is reconstructed using blocks of a same fragment and blocks of an untransmitted fragment. The same fragment may include both blocks that were acknowledged as being received and blocks that were not acknowledged as being received. In some embodiments, portions of the initial data unit payload are rearranged to generate smaller data units for retransmission when channel conditions have degraded.

Abstract: A media access controller (MAC) of a broadband wireless communication device may vary the size of data unit payloads based on a physical layer burst size. In automatic retransmission request (ARQ) enabled service flows, the MAC may delay construction of data units from the data unit payloads until after entering an ARQ retransmission request window. In some embodiments, the MAC comprises per-flow schedulers to schedule service data units (SDUs) for each of a plurality of service flows, and per-service flow retransmission request handlers to reconstruct and retransmit data units.