Method and apparatus for radio link monitoring

A user equipment (UE), comprising:

• one or more non-transitory computer-readable media having computer-executable instructions embodied therein;
• and
• at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor configured to execute the computer-executable instructions to:
• receive, from a serving cell, a radio link monitoring (RLM) configuration;
• monitor an RLM reference signal (RS) (RLM-RS) resource indicated by the RLM configuration to determine a first downlink (DL) radio link quality;
• monitor a backup RLM-RS resource that is associated with the RLM-RS resource to determine a second DL radio link quality after determining that the first DL radio link quality is lower than a first threshold and the RLM configuration also indicates the backup RLM-RS resource;
• send, via a physical (PHY) layer of the UE, an RLM indication to a higher layer of the UE based on at least one of the first DL radio link quality and the second DL radio link quality;
• and
• determine an indication time interval,
• wherein two successive RLM indications are separated by at least the indication time interval, and the indication time interval has different values depending on whether or not the RLM configuration also indicates the backup RLM-RS resource.