US 12,219,641 B2
Method and apparatus for transmitting and receiving data in wireless communication system
Dong Gun Kim, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd, (KR)
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on May 3, 2021, as Appl. No. 17/306,094.
Application 17/306,094 is a continuation of application No. 16/189,127, filed on Nov. 13, 2018, granted, now 10,999,884.
Claims priority of application No. 10-2017-0149796 (KR), filed on Nov. 10, 2017; and application No. 10-2018-0075786 (KR), filed on Jun. 29, 2018.
Prior Publication US 2021/0259036 A1, Aug. 19, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 76/19 (2018.01); H04L 1/18 (2023.01); H04W 16/24 (2009.01); H04W 76/15 (2018.01); H04W 76/30 (2018.01); H04W 80/02 (2009.01)
CPC H04W 76/19 (2018.02) [H04L 1/18 (2013.01); H04W 16/24 (2013.01); H04W 76/15 (2018.02); H04W 76/30 (2018.02); H04W 80/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving a radio resource control (RRC) message to change or release a secondary cell group (SCG);
performing a re-establishment for a radio link control (RLC) entity of the terminal based on the RRC message; and
performing a packet data convergence protocol (PDCP) data recovery based on the RRC message,
wherein performing the PDCP data recovery comprises, in case that a PDCP status report is not received:
determining, by a lower layer, whether a successful delivery of PDCP data has been confirmed; and
retransmitting a PDCP protocol data unit (PDU) previously submitted to the re-established RLC entity, for which a successful delivery has not been confirmed by the lower layer,
wherein a PDCP PDU previously submitted, for which a successful delivery has been confirmed by the lower layer, is not retransmitted to the re-established RLC entity.