	US 12,075,504 B2
	Method and device for recovering connection failure to network in next generation mobile communication system
Donggun Kim, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Oct. 20, 2022, as Appl. No. 17/969,945.
Application 17/969,945 is a continuation of application No. 16/826,854, filed on Mar. 23, 2020, granted, now 11,483,889, issued on Oct. 25, 2022.
Claims priority of application No. 10-2019-0032958 (KR), filed on Mar. 22, 2019; application No. 10-2019-0040170 (KR), filed on Apr. 5, 2019; application No. 10-2019-0049732 (KR), filed on Apr. 29, 2019; application No. 10-2019-0108442 (KR), filed on Sep. 2, 2019; and application No. 10-2019-0119932 (KR), filed on Sep. 27, 2019.
Prior Publication US 2023/0040003 A1, Feb. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 76/18 (2018.01); H04W 76/19 (2018.01)

CPC H04W 76/18 (2018.02) [H04W 76/19 (2018.02)]

16 Claims

1. A method by a terminal in a wireless communication system, the method comprising:

detecting a radio link failure for a master cell group (MCG); and

performing an operation related to transmission of a message associated with the radio link failure for the MCG,

wherein the performing the operation comprising:

starting a timer, and

transmitting, to the MCG via a secondary cell group (SCG), the message associated with the radio link failure for the MCG via a signaling radio bearer (SRB)1 or an SRB3,

wherein the SRB1 corresponds to a split SRB,

wherein, in case that the SRB1 is configured as the split SRB and a packet data convergence protocol (PDCP) duplication is not configured, a configuration for an uplink transmission is changed from a primary radio link control (RLC) entity associated with the MCG to a secondary RLC entity associated with the SCG, and

wherein, in case that the SRB1 is configured as the split SRB, the message associated with the radio link failure for the MCG is transmitted via the SRB1.