Improvement of fairness between assured service TCP users in a differentiated service network

To support quality of service (QoS) in the existing Internet, differentiated service (DiffServ) has been proposed. However, the unfairness between TCP connections remains as a serious problem, not only in the conventional best-effort service Internet, but also in the new DiffServ network. In this paper, we propose the balancing marker algorithm (BMA) to improve the fairness between individual connections of aggregated sources in a DiffServ network. This algorithm is based on the 3-level priority marking method. We compare the 2-level packet priority marker with the balancing marker proposed in this paper. We show that the BMA improved the fairness and the throughputs between the individual connections with different delays in an aggregated source.