Methods, systems, and devices for
wireless communication are described. A
user equipment (UE) may receive, for a first
cell, first control signaling that indicates one or more bandwidth parts that are
usable by the UE for uplink and downlink communication within the first
cell. The one or more first bandwidth parts may be within a first carrier for carrier aggregation (CA) at the UE. Additionally, for a second
cell, the UE may receive second control signaling that indicates a second bandwidth part that is
usable by the UE for uplink communication within the second cell. The second bandwidth part may be within a second carrier for CA. The second control signaling may lack any indication of any bandwidth part that is
usable by the UE for downlink communication within the second cell. The UE may monitor the first carrier for third control signaling associated with the second cell.