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Smooth and Fast Rate Adaptation Mechanism (SFRAM) for TCP-Friendly Internet Video

A new rate adaptation mechanism based on the TCP-throughput equation and tailored to the Internet video transmission is presented in this paper. The proposed scheme not only achieves TCP-friendliness but also provides a smooth and fast rate adaptation mechanism (SFRAM) for Internet video delivery. By adaptively averaging measurements such as the round trip time (RTT) and the packet loss rate for a suitable window interval, SFRAM mitigates unnecessary fluctuation that is undesirable for video transmission. The adopted special weighting scheme enables the response in a fast manner only for distinct network variations so that the overall network utilization is improved and the end-to-end video quality is sustained. Additionally, the integration of RED (random early detection) ECN (explicit congestion notification) into SFRAM provides the best performance possible.