Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, a control message that comprises scheduling information for a downlink message to be received by the UE and an uplink message to be transmitted by the UE. The UE may determine first frequency information for the downlink message and second frequency information for the uplink message based at least in part on the scheduling information, a first bitfield size associated with resource allocation for a first bandwidth part associated with the downlink message, and a second bitfield size associated with resource allocation for a second bandwidth part width associated with the uplink message. The UE may communicate the uplink message and the downlink message with the base station according to the first frequency information and the second frequency information.