| 摘要 |
There is disclosed a method of a User Equipment, UE, in a 3rd Generation Partnership Project, 3GPP, compliant mobile communications network supporting dual connectivity, and a corresponding UE. The method comprises detecting a signalled reconfiguration procedure of a Data Radio Bearer, DRB, having or changing to a DRB type in which downlink, DL, data is received from only serving cells of a Secondary Cell Group, SCG, connected to a Secondary eNB, SeNB, via an SCG DRB, or in which DL data is received from a SCG and also from serving cells of a Master Cell Group, MCG, connected to a Master eNB, MeNB, via a split DRB. If a DRB reconfiguration procedure type including one or more of: a handover; an SCG change; and DRB type change; is detected, the method further comprises: deciding one or more required layer 2 DRB-related actions resulting from the DRB reconfiguration based on: the initial DRB configuration; the final DRB configuration; and relevant DRB reconfiguration procedure types; and performing said decided layer 2 DRB-related actions. |
