Method and apparatus for performing communication in wireless communication system

A method for handling a radio link failure (RLF) in a new radio (NR) wireless communication system comprising a master cell group (MCG) and a secondary cell group (SCG), the method performed by a user equipment (UE) comprising:

• receiving a measurement configuration comprising information regarding a second timer from a secondary node (SN);
• in case that a measurement report type is set to event-triggered and a measurement report event is triggered, identifying the second timer for a Primary SCG cell (PSCell);
• starting the second timer, in case that a first timer for the PSCell is running;
• detecting an expiry of one of:
• the first timer and the second timer for the PSCell;
• declaring a SCG RLF upon expiry of one of the first timer and the second timer;
• and
• initiating a SCG failure procedure upon declaring the SCG RLF.

A User Equipment (UE) configured to handle a radio link failure (RLF) in a new radio (NR) wireless communication system comprising a master cell group (MCG) and a secondary cell group (SCG), the UE comprising:

• a transceiver;
• a memory;
• and
• a processor, coupled with the memory, configured to:
• receive, via the transceiver, a measurement configuration comprising information regarding a second timer from a secondary node (SN);
• in case that a measurement report type is set to event-triggered and a measurement report event is triggered, identify the second timer for a Primary secondary cell (PSCell);
• start the second timer in case that a first timer for the PSCell is running;
• detect an expiry of one of:
• the first timer and the second timer for the PSCell;
• declare a SCG RLF upon expiry of one of the first timer and the second timer;
• and
• initiate a SCG failure procedure upon declaring the SCG RLF.