Methods, apparatuses and systems directed to beam management in connection with multiple cells and/or multiple transmission/reception points

A wireless transmit/receive unit (WTRU) comprising circuitry, including any of a transmitter, receiver, processor and memory, configured to:

• determine the first and second sets of beam failure detection reference signals based on first and second identifiers of first and second control resource set groups, respectively, wherein:
• the first and second sets of beam failure detection reference signals are associated with first and second sets of beams, respectively;
• the first set of beam failure detection reference signals is associated with a first one or more transmission configuration indicator states associated with the first control resource set group;
• and
• the second set of beam failure detection reference signals is associated with a second one or more transmission configuration indicator states associated with the second control resource set group;
• receive first information indicating first and second sets of reference signals, wherein:
• the first set of reference signals corresponds to one or more candidate beams associated with the first set of beam failure detection reference signals;
• and
• the second set of reference signals corresponds to one or more candidate beams associated with the second set of beam failure detection reference signals;
• determine at least one beam failure for at least one of the first set of beams and the second set of beams based on the first set of beam failure detection reference signals and the second set of beam failure detection reference signals, respectively;
• determine a set of reference signals from one of the first and second sets of reference signals based on the determined at least one beam failure;
• determine a reference signal of the determined set of reference signals;
• and
• transmit an uplink transmission comprising second information indicating the determined reference signal and an indication of the one of the first and second sets of beam failure detection reference signals associated with the determined set of reference signals.

A wireless transmit/receive unit (WTRU) comprising circuitry, including any of a transmitter, receiver, processor and memory, configured to

• determine first and second sets of beam failure detection reference signals based on information indicated by one or more transmission configuration indicator states associated with first and second control resource set groups, respectively, wherein the first and second sets of beam failure detection reference signals are associated with first and second sets of beams, respectively;
• receive first information indicating first and second sets of reference signals, wherein the first set of reference signals corresponds to one or more candidate beams associated with the first set of beam failure detection reference signals, and wherein the second set of reference signals corresponds to one or more candidate beams associated with the second set of beam failure detection reference signals;
• determine at least one beam failure for at least one of the first set of beams and the second set of beams based on the first set of beam failure detection reference signals and the second set of beam failure detection reference signals, respectively;
• determine a set of reference signals from one of the first and second sets of reference signals based on the determined at least one beam failure;
• determine a reference signal of the determined set of reference signals;
• and
• transmit an uplink transmission comprising second information indicating the determined reference signal and an indication of the one of the first and second sets of beam failure detection reference signals associated with the determined set of reference signals.