Method and apparatus for clearing retransmission resources based on acknowledgement

A first wireless device operating in a wireless communication system, the wireless device comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• reserving multiple sets of resources for transmissions of multiple media access control (MAC) protocol data units (PDUs);
• transmitting a first MAC PDU to a second wireless device using at least one resource from a first set of resources corresponding to the first MAC PDU among the multiple sets of resources;
• receiving a positive acknowledgement for the first MAC PDU from the second wireless device;
• clearing remaining resources from the first set of resources corresponding to the first MAC PDU;
• and
• transmitting a second MAC PDU to the second wireless device using at least one resource from a second set of resources corresponding to the second MAC PDU among the multiple sets of resources.

A processing apparatus for a wireless device configured to operate in a wireless communication system, the processing apparatus comprising:

• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor,
• wherein the at least one processor is configured to perform operations comprising:
• reserving multiple sets of resources for transmissions of multiple media access control (MAC) protocol data units (PDUs);
• generating a first MAC PDU using at least one resource from a first set of resources corresponding to the first MAC PDU among the multiple sets of resources;
• obtaining a positive acknowledgement for the first MAC PDU;
• clearing remaining resources from the first set of resources corresponding to the first MAC PDU;
• and
• generating a second MAC PDU using at least one resource from a second set of resources corresponding to the second MAC PDU among the multiple sets of resources.