Method and apparatus for handling radio link failure in system using multiple reference signals

A method performed by a base station in a communication system, the method comprising:

• transmitting, to a terminal, a radio resource control (RRC) message including first information associated with a reference signal for a radio link monitoring (RLM) and second information associated with a threshold for the RLM, the first information being configured for a bandwidth part (BWP) of a primary cell (PCell);
• and
• transmitting at least one of a synchronization signal block (SSB) or a channel state information—reference signal (CSI-RS),
• wherein the first information is used for indicating at least one of the SSB or the CSI-RS to be monitored for a radio link quality,
• wherein the second information is used for indicating a first threshold for an in-sync and a second threshold for an out-of-sync, and
• wherein the in-sync is indicated to a higher layer of the terminal in case that the radio link quality of the at least one of the SSB or the CSI-RS is greater than the first threshold.

A terminal in a communication system, the terminal comprising:

• a transceiver;
• and
• at least one processor configured to:
• receive, from a base station via the transceiver, a radio resource control (RRC) message including first information associated with a reference signal for a radio link monitoring (RLM) and second information associated with a threshold for the RLM, the first information being configured for a bandwidth part (BWP) of a primary cell (PCell),
• monitor a radio link quality of at least one reference signal indicated by the first information,
• compare the radio link quality of the at least one reference signal based on a first threshold and a second threshold, and
• indicate an in-sync to a higher layer of the terminal in case that the radio link quality of the at least one reference signal is greater than the first threshold.

A base station in a communication system, the base station comprising:

• a transceiver;
• and
• at least one processor configured to:
• transmit, to a terminal via the transceiver, a radio resource control (RRC) message including first information associated with a reference signal for a radio link monitoring (RLM) and second information associated with a threshold for the RLM, the first information being configured for a bandwidth part (BWP) of a primary cell (PCell), and
• transmit, via the transceiver, at least one of a synchronization signal block (SSB) or a channel state information—reference signal (CSI-RS),
• wherein the first information is used for indicating at least one of the SSB or the CSI-RS to be monitored for a radio link quality,
• wherein the second information is used for indicating a first threshold for an in-sync and a second threshold for an out-of-sync, and
• wherein the in-sync is indicated to a higher layer of the terminal in case that the radio link quality of the at least one of the SSB or the CSI-RS is greater than the first threshold.