On TCP-friendly video transfer with consideration on application-level QoS

When both TCP and UDP sessions co-exist in the Internet, the performance of TCP sessions easily deteriorate because of congestion incurred by UDP sessions of real-time multimedia applications. We extend the TCP-friendly rate control protocol which originally pursues the fair-share of link bandwidth among TCP and non-TCP sessions. With our proposed method, the achievable application-level QoS, such as perceived video quality and file transfer delay, becomes the same among TCP and non-TCP which traverse the same path. Through simulation experiments, we show that the high quality video transfer can be performed with our proposed method while satisfying the TCP-friendliness with regard to application-level QoS