A method for managing transmission over a network by adjusting a flow control window based on one or more parameters obtained from one or more connections, applications or network conditions. In one embodiment a controller modifies the receiver TCP advertised window of one or several connections to match the end-to-end bandwidth-delay product (BDP) for bandwidth fair sharing and improving the quality of experience (QoE). The controller can be placed in any given entity managing packets, such as a sender entity, a transmitting entity or any other entity handling connection packets. A mechanism for estimating available path bandwidth and/or link capacity and location by analyzing the distribution of inter-packet arrival times. Packet pair dispersion analysis can be utilized based on passive evaluation of the acknowledgements of a TCP flow or based on active probing. Machine learning using a neural network can be used to analyze the distribution of inter-packet arrival times.