A method including a protocol stack including a plurality of layers, the plurality of layers comprising-including a first layer and a second layer. The first layer generating a first protocol data unit (PDU) associated with a first data flow. The second layer obtaining the first PDU and information about the first PDU. Further, the method includes the second layer either i) determining, based on the information about the first PDU, a sublayer configuration to be applied to at least one or more PDUs associated with the first data flow or ii) providing to another layer the information about the first PDU so that the another layer can determine, based on the information, the sublayer configuration to be applied to the one or more PDUs associated with the first data flow.