receiving, from a user equipment (UE), a request for establishing another session to a data network identified by a data network identification, wherein at least one existing session of the UE has been established to the data network;

checking whether subscription data or policy data for the UE includes a first indication which indicates that a same session management node for multiple sessions to the data network identified by the same data network identification is required;

selecting, based on the checking, the same session management node as the at least one existing session for the UE when the subscription data or the policy data includes the first indication; and

sending a session establishment request to the selected session management node.