An improved scheduling mechanism usable for a data transmission in a packet based network is provided. A plurality of connections is detected , and for each of the connections, a buffer occupancy level is determined. Then, the connections having a smaller buffer occupancy level are prioritized in comparison to the other connections, and packets of the plurality of connections are scheduled on the basis of the result of the prioritizing The scheduling mechanism is implemented in a network element of the packet based network or in a sender and receiver.