Use of Uplink Communication Quality as Basis to Control Split-Uplink Operation for Dual-Connectivity Service

A computing system operable to control apportionment of uplink data flow of a dual-connected user equipment device (UE) in a communication system including first and second access nodes, the computing system comprising:

• a network communication interface;
• a processing unit;
• non-transitory data storage;
• and
• program instructions stored in the non-transitory data storage and executable by the processing unit to carry out operations including:
• determining an uplink data apportionment of the UE when the UE has co-existing air-interface connections with the access nodes, including a first connection with the first access node and a second connection with the second access node, wherein the uplink data apportionment defines what portion of the uplink data flow the UE should provide on the first connection versus what portion of the uplink data flow the UE should provide on the second connection, and wherein determining the uplink data apportionment is based on at least one of (i) a comparison of uplink power headroom of the UE on the first connection with uplink power headroom of the UE on the second connection or (ii) a comparison of uplink noise on the first connection with uplink noise on the second connection, and
• causing the UE to operate in accordance with the determined uplink data apportionment.