US 12,004,027 B2
Method and apparatus for handling radio link failure in wireless communication system
Fasil Abdul Latheef, Calicut (IN); Mangesh Abhimanyu Ingale, Bangalore (IN); Himke Van Der Velde, Zwolle (NL); and Soenghun Kim, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Appl. No. 17/310,526
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
PCT Filed Feb. 7, 2020, PCT No. PCT/KR2020/001751
§ 371(c)(1), (2) Date Aug. 6, 2021,
PCT Pub. No. WO2020/162704, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 201941005101 (IN), filed on Feb. 8, 2019; and application No. 201941005101 (IN), filed on Feb. 3, 2020.
Prior Publication US 2022/0038968 A1, Feb. 3, 2022
Int. Cl. H04W 36/00 (2009.01)
CPC H04W 36/0079 (2018.08) [H04W 36/0058 (2018.08); H04W 36/0061 (2013.01); H04W 36/00837 (2018.08)] 4 Claims
OG exemplary drawing
 
1. A method for handling a radio link failure (RLF) in a wireless communication system comprising a master cell group (MCG) and a secondary cell group (SCG) the method comprising:
receiving, a radio resource control (RRC) reconfiguration message including measurement configuration information for the SCG, via a signaling radio bearer 3 (SRB 3);
identifying that a measurement report type is set to event-triggered and a measurement report event for the SCG is triggered, based on report configuration information for the SCG including information indicating use of a T312 timer;
in case that the information indicating the use of the T312 timer is included in the report configuration information for the SCG and a T310 timer is running, starting the T312 timer based on the measurement configuration information for the SCG, including a value of the T312 timer;
based on an expiry of the T312 timer on a primary SCG cell (PSCell), declaring a RLF of the SCG; and
transmitting, via a signaling radio bearer 1 (SRB 1), a SCG failure message including a cause value corresponding to a failure type as the expiry of the T312 timer.