Method of performing polling procedure in a wireless communication system

A method for generating a data block in a protocol layer of a sender in a wireless communication system, the method comprising:

• generating a data block in a radio link control (RLC) layer of a sender, the data block comprising a polling field;
• and
• setting a value of the polling field of the data block according to a status of a transmission buffer and a retransmission buffer of the sender, and wherein the polling field is set further in consideration of a counter value;
• and
• wherein the value of the polling field is set to a value for triggering a receiver of the data block to transmit a status report to the sender if both the transmission buffer and the retransmission buffer of the sender are empty of data,
• increasing the counter value per one byte of a data field of the data block, wherein the polling field is set to the value for triggering a polling if the counter value exceeds a predetermined threshold;
• and
• transmitting the data block to the receiver.

A sender for performing a polling procedure while performing a data retransmission function in a wireless communication system, the sender comprising:

• a transmission buffer;
• a retransmission buffer;
• and
• a radio link control (RLC) layer setting a polling field of a data block to be transmitted to a receiver, wherein a value of the polling field is set according to a status of the transmission buffer and a status of the retransmission buffer, and wherein the polling field is set further in consideration of a counter value,
• wherein the polling field is set to a value for triggering the receiver to transmit a status report to the sender if both the transmission buffer and the retransmission buffer of the sender are empty of data, and wherein the counter value is increased per one byte of a data field of the data block, and the polling field is set to the value for triggering a polling if the counter value exceeds a predetermined threshold;
• a transmitter configured to transmit the data block to the receiver.

A user equipment (UE) for performing a polling procedure in a protocol layer performing a data retransmission function in a wireless communication system, the UE comprising:

• a transmission buffer;
• a retransmission buffer;
• a controller configured to:
• set a polling field of a data block to be transmitted to a receiver, wherein a value of the polling field is set according to a status of the transmission buffer and a status of the retransmission buffer, and wherein the polling field is set further in consideration of a counter value,
• set the polling field to a value for triggering the receiver to transmit a status report to the sender if both the transmission buffer and the retransmission buffer of the sender are empty of data, wherein the counter value is increased per one byte of a data field of the data block, and the polling field is set to the value for triggering a polling if the counter value exceeds a predetermined threshold;
• and
• a transmitter configured to transmit the data block to the receiver.