Method for operating a user equipment (UE) communicating in parallel by means of a primary base node (pBS) and at least one secondary base node (sBS) of a cellular network (CLN) with a remote terminal, the cellular network comprising at least two radio access networks (RAN), the primary base node (pBS) and the secondary base node (sBS) being assigned to different radio access networks, the primary base node (pBS) being the base node the user equipment (UE) is camping on in non-connected mode, the secondary base node (sBS) being a candidate base node evaluated by at least one of the user equipment (UE) or the cellular network as suited for serving the user equipment (UE), for setting up a communication link to the remote terminal the method being characterized in that it comprises the steps for the user equipment (UE) of: - sending a first capability message (M2.1) to the primary base node (pBS), the first capability message (M2.1) comprising information about which available capabilities (UR) the user equipment (UE) provides, - receiving a first indication message (M2.2) from the primary base node (pBS) relating to the capabilities indicated in the first capability message (M2.1), the first indication message (M2.2) indicating resources allocated by the primary node (pBS) for the next data transmission session to the user equipment (UE), - sending a second capability message (M2.3) to the secondary base node (sBS), the second capability message (M2.3) comprising indications about by now still unused available capabilities of the user equipment (UE) to allow the secondary base node (sBS) to identify which of the capabilities it is able to serve, - receiving a second indication message (M2.4) from the secondary base node (sBS) relating to the capabilities indicated in the second capability message (M2.3), the second indication message (M2.4) indicating resources allocated by the secondary node (sBS) for the next data transmission session to the user equipment (UE), - sending a third capability message (M2.5) to the primary base node (pBS), the third capability message (M2.5) comprising those available capabilities still unused at the user equipment (UE), - initiating the communication link (M2.6) by means of the primary (pBS) and the secondary base node (sBS) using said allocated resources. - sending a first capability message (M2.1) to the primary base node (pBS), the first capability message (M2.1) comprising information about which available capabilities (UR) the user equipment (UE) provides, - receiving a first indication message (M2.2) from the primary base node (pBS) relating to the capabilities indicated in the first capability message (M2.1), the first indication message (M2.2) indicating resources allocated by the primary node (pBS) for the next data transmission session to the user equipment (UE), - sending a second capability message (M2.3) to the secondary base node (sBS), the second capability message (M2.3) comprising indications about by now still unused available capabilities of the user equipment (UE) to allow the secondary base node (sBS) to identify which of the capabilities it is able to serve, - receiving a second indication message (M2.4) from the secondary base node (sBS) relating to the capabilities indicated in the second capability message (M2.3), the second indication message (M2.4) indicating resources allocated by the secondary node (sBS) for the next data transmission session to the user equipment (UE), - sending a third capability message (M2.5) to the primary base node (pBS), the third capability message (M2.5) comprising those available capabilities still unused at the user equipment (UE), - initiating the communication link (M2.6) by means of the primary (pBS) and the secondary base node (sBS) using said allocated resources. <EOS>