Dynamic air-interface reconfiguration based on predicted movement toward location where dual-connectivity tends to be lost

A computing system comprising:

• at least one processing unit;
• at least one non-transitory data storage;
• and
• program instructions stored in the at least one non-transitory data storage and executable by the at least one processing unit to cause the following operations to be carried out:
• detecting, when a user equipment device (UE) has dual connectivity including a first air-interface connection extending between a first access node and the UE and a second air-interface connection extending between a second access node and the UE, and when the first air-interface connection is defined on a first radio frequency (RF) carrier, that the UE is moving toward a geographic area where UEs that were served by the first access node on the first RF carrier as part of dual connectivity lost their dual connectivity due at least to their wireless-communication performance, and
• based at least on the detecting, (i) selecting a second RF carrier based at least on the second RF carrier being lower frequency than the first RF carrier and (ii) reconfiguring the first air-interface connection of the UE's dual connectivity to be defined on the selected second RF carrier instead of on the first RF carrier.