Transmission schemes and modes and fallback schemes for the access link of systems operating in higher frequency bands

A wireless transmit/receive unit (WTRU) comprising:

• a transceiver;
• and
• a processor, wherein:
• the transceiver and the processor are configured to receive an identifier of a beam;
• the processor is further configured to measure a downlink quality associated with at least one beam;
• the processor is further configured to determine whether the measured downlink quality is below a threshold value;
• and
• the transceiver and the processor are further configured to receive at least one control channel transmission using the beam of the identifier in response to a determination that the measured downlink quality is below the threshold value, wherein the beam used to receive the at least one control channel transmission is a same beam used to receive an associated data channel transmission.