Systems and methods enable maximizing network data throughput via optimizing network capacity allocation. The network throughput maximization system comprises a network transporting data from source nodes to a destination node of the network, buffers for buffering data bytes to be sent from the source nodes to the destination node, and an element at the destination node that cyclically allocates the network capacity among the source nodes according to the amounts of data bytes arrived in the buffers at the source nodes during the previous capacity allocation cycle. The network data transport capacity allocation optimization method comprises steps of buffering at network source nodes data bytes to be transported to a network destination node, and cyclically allocating by the destination node the data transport capacity among the source nodes based on the relative volumes of bytes received in the buffers of the source nodes during the most recent capacity allocation cycle.