TCP Fairness Improvement of DCCP Flow Control for Bursty Real-Time Applications

Recent years have seen dramatic growth in the realtime traffic generated by the emergence of various real-time applications on the Internet, which typically use the non-congestion-controlled UDP protocol as their transport protocol. This increasing growth of the non-congestion-controlled real-time traffic can easily cause critical issue, congestion collapse, or even prevent the traffic of well mannered congestion-controlled TCP flows. To solve these problems, the datagram congestion control protocol (DCCP) has been proposed. In order to successfully deploy DCCP on the Internet, it is vital to ensure that DCCP is fully compatible with the existing dominant TCP flows. In this paper, we evaluate and propose an algorithm to improve the TCP fairness of DCCP flow control for bursty real-time applications. Through numerous simulation results, we show that our proposed algorithm improves the fairness between TCP and DCCP flows without negative effect on real-time characteristics.