The present invention relates to methods and devices for performing autonomous RLC retransmission in a wireless communication system. The methods involve and the devices perform transmitting a RLC PDU to a RLC receiver on a first transmission opportunity. When the RLC PDU is transmitted, a check is performed to determine if a condition for performing a RLC PDU retransmission procedure is met. If the condition is met, the RLC PDU is stored in a re-transmitter buffer and re-transmitted during consecutive transmission opportunities following the first transmission opportunity.