Carrier aggregation for uplink cells

A network entity, comprising:

• one or more memories storing processor-executable code;
• and
• one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to:
• output, to a user equipment (UE), first control signaling for a first cell, wherein the first control signaling indicates one or more first bandwidth parts that are usable by the UE for uplink communication and downlink communication within the first cell, and wherein the one or more first bandwidth parts are within a first carrier of a set of carriers for carrier aggregation communication between the UE and the network entity;
• and
• output, to the UE, second control signaling for a second cell, wherein the second control signaling indicates a second bandwidth part that is usable by the UE for uplink communication within the second cell, wherein the second control signaling lacks any indication of any bandwidth part is usable by the UE for downlink communication within the second cell, and wherein the second bandwidth part is within a second carrier of the set of carriers.

A method for wireless communication by a user equipment (UE), comprising:

• receiving first control signaling for a first cell, wherein the first control signaling indicates one or more first bandwidth parts that are usable by the UE for uplink communication and downlink communication within the first cell, and wherein the one or more first bandwidth parts are within a first carrier of a set of carriers for carrier aggregation communication between the UE and a network entity;
• receiving second control signaling for a second cell, wherein the second control signaling indicates a second bandwidth part that is usable by the UE for uplink communication within the second cell, wherein the second control signaling lacks any indication of any bandwidth part that usable by the UE for downlink communication within the second cell, and wherein the second bandwidth part is within a second carrier of the set of carriers;
• and
• monitoring the first carrier for third control signaling associated with the second cell, wherein monitoring the first carrier for the third control signaling is based at least in part on the second control signaling lacking any indication of any bandwidth part that is usable by the UE for downlink communication within the second cell.