A target cell receives a handover message originating from a source cell for a user equipment (UE) and receives buffered data for one or more protocol data unit (PDU) Sets in transition between the source cell and the UE. The target cell receives PDU Set information for the one or more PDU Sets and communicates with the UE based on the PDU Set information for the one or more PDU Sets. A source cell sends or receives a portion of a PDU Set with a UE. The apparatus initiates a handover of the UE to a target cell, provides buffered data for the PDU Set to the target cell, and provides PDU Set information for the PDU Set to the target cell.