Abstract: The invention refers to a method being performed by a wireless device, UE, to forward data of an application patent unit, PDU, the application PDU being generated by an application in the UE, wherein this wherein the UE performs the steps of: segmenting (100) the application PDU into a plurality of data packets, determining (101) one or a plurality of Quality-of-Service, QoS, parameters associated to the application PDU, determining (102) that different data packets need a different forwarding treatment to comply with the one or the plurality of QoS parameters, and mapping (103) the different data packets to different data radio bearers, DRBs, or providing a different treatment for forwarding in one DRB; the invention further refers to corresponding methods in a code network and in a radio access, RAN node; the invention further relates to a corresponding UE, a core network node and a RAN node.