Patent ID: 9699822
Date: 2017-07-04
CPC Classifications: H04L,H04W

Claim:
1. A method for transmitting a message in a wireless communication system, the method performed by a user equipment (UE) and comprising: submitting a message to a packet data convergence protocol (PDCP) layer and a radio link control (RLC) layer; detecting a radio link failure (RLF) or a handover failure; determining whether or not the RLC layer receives acknowledgement (ACK) or negative acknowledgement (NACK) for the message from the network; and performing reestablishment of the connection with the network, wherein when the RLC layer does not receive the ACK for the message and the UE detects the RLF or the handover failure, the UE retransmits the message upon completing the reestablishment although the RLC layer does not receive the NACK for the message.