US 12,225,380 B2
Method and apparatus of supporting lossless PDCP version change in next-generation mobile communication system
Donggun Kim, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd, (KR)
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on Aug. 14, 2023, as Appl. No. 18/449,292.
Application 18/449,292 is a continuation of application No. 17/739,536, filed on May 9, 2022, granted, now 11,770,712.
Application 17/739,536 is a continuation of application No. 16/533,169, filed on Aug. 6, 2019, granted, now 11,330,439, issued on May 10, 2022.
Claims priority of application No. 10-2018-0092323 (KR), filed on Aug. 8, 2018.
Prior Publication US 2023/0403560 A1, Dec. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 12/106 (2021.01); H04L 1/1607 (2023.01); H04L 5/00 (2006.01); H04L 47/32 (2022.01); H04L 69/22 (2022.01); H04W 12/0433 (2021.01); H04W 36/00 (2009.01); H04W 76/30 (2018.01)
CPC H04W 12/106 (2021.01) [H04L 1/1671 (2013.01); H04L 5/0055 (2013.01); H04L 47/32 (2013.01); H04L 69/22 (2013.01); H04W 12/0433 (2021.01); H04W 36/00698 (2023.05); H04W 76/30 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a radio resource control (RRC) message including information indicating a change from a first packet data convergence protocol (PDCP) entity for a bearer to a second PDCP entity for the bearer, the first PDCP entity and the second PDCP entity being in the terminal;
identifying whether the first PDCP entity for the bearer is changed to the second PDCP entity for the bearer based on the information indicating the change;
processing data with a PDCP sequence number for the first PDCP entity as new data for the second PDCP entity, in case that the first PDCP entity for the bearer is changed to the second PDCP entity for the bearer;
releasing the first PDCP entity;
configuring a new PDCP header associated with the data; and
encrypting the data with a new security key,
wherein the PDCP sequence number for the first PDCP entity is greater than or equal to the PDCP sequence number of data for which successful transmission is not acknowledged from a radio link control (RLC) entity.