A method for serving an aggregate flow in a communication network node includes a plurality of individual flows. The method includes identifying in the aggregate flow, based on serving resources allocated to the network node, individual flows that may be served without substantial detriment to perceived performance, and serving the identified individual flows with priority with respect to the remaining individual flows in the aggregate flow. The method allows the presence of individual flows that may not be served without substantial detriment to perceived performance due to shortage of serving resources to be notified to an external control entity.