Method performed by user equipment and user equipment

A relay user equipment (UE), comprising:

• a processor;
• and
• a memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
• initiate transmission of a notification message in a case that a Radio Link Failure (RLF) occurs over a PC5 connection with a remote UE, the notification message including a destination identity associated for the remote UE and an indication which refers to that the RLF has occurred over the PC5 connection with the remote UE.

A user equipment (UE), comprising:

• a processor;
• and
• a memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
• upon reception of a notification message as a remote UE which includes an indication type as PC5 Radio Link Failure (RLF) and a destination identity associated with an other remote UE, perform actions which include:
• release a Data Radio Bearers (DRB) and a Signaling Radio Bears (SRB) for a PC5 connection;
• discard a New Radio (NR) sidelink communication related configuration for the PC5 connection;
• consider a PC5 Radio Resource Control (RRC) connection is released for the PC5 connection;
• and
• indicate a release of the PC5-RRC connection to an upper layer.