Method and apparatus for transmitting signals by tm rlc entity of transmission end in wireless communication system

A transmission end in a wireless communication system, the transmission end comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to control a Medium Access Control (MAC) entity of the transmission end to:
• receive, from an upper layer, information about sizes of service data units (SDUs) stored in the upper layer;
• select at least one SDU of the SDUs by considering an uplink grant and the sizes of SDUs;
• transmit information about the at least one selected SDU to the upper layer;
• receive the at least one selected SDU from the upper layer;
• generate a MAC protocol data unit (PDU) including the at least one selected SDU;
• and
• transmit the MAC PDU to a reception end.

A method for transmitting signals by a Transparent Mode (TM) Radio Link Control (RLC) entity of a transmission end in a wireless communication system, the method comprising:

• receiving data units from a Packet Data Convergence Protocol (PDCP) layer;
• storing the data units in a buffer;
• transmitting, to a Medium Access Control (MAC) layer, information about sizes of the data units;
• receiving, from the MAC layer, information about at least one data unit among the data units;
• transmitting, to the MAC layer, the at least one data unit.

A transmission end in a wireless communication system, the transmission end comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to control a Transparent Mode (TM) Radio Link Control (RLC) entity of the transmission end to:
• receive data units from a Packet Data Convergence Protocol (PDCP) layer;
• store the data units in the memory;
• transmit, to a Medium Access Control (MAC) layer, information about sizes of the data units;
• receive, from the MAC layer, information about at least one data unit among the data units;
• transmitting, to the MAC layer, the at least one data unit.