A method for a cellular communications system (100) with a user (UE, 110) and a hierarchy of nodes between a UE (110) and an external network (150). The hierarchy comprises at least first (125) and second (130) nodes, and there can be a plurality of connections between the UE (110) and the network (150) via data channels (160) between the nodes, and plurality of data containers (170) with data regarding the data channels. A connection between a UE (110) and the external network (150) can be inactivated whilst the corresponding data container (170) is preserved, and an inactivated connection can be reactivated by the external network (150). When a connection is to be reactivated, the second node (130) utilizes information from the external network (150) in order to reactivate the data channel or channels which is/are concerned and which have had their data containers (170) preserved.