On network bandwidth sharing for transporting rate-adaptive packet video using feedback.

Hou, Yiwei Thomas; Panwar, Shivendra S.; Zhi-Li Zhang; Tzeng, Henry; Ya-Qin Zhang

While existing research shows that feedback-based congestion control mechanisms are capable of providing better video quality and higher link utilization for rate-adaptive packet video, there has been relatively little study on how to share network bandwidth among competing rate-adaptive video connections, when feedback control is used in a fully distributed network. This paper addresses this issue by presenting a framework of network bandwidth sharing for transporting rate-adaptive packet video using feedback. We show how a weight-based bandwidth sharing policy can be used to allocate network bandwidth among competing video connections and design a feedback control algorithm using an Available Bit Rate (ABR)-like flow control mechanism. A novel video source rate adaptation algorithm is also introduced to decouple a video source's actual transmission rate from the rate used for distributed protocol convergence. Our feedback control algorithm provides guaranteed convergence and smooth source rate adaptation to our weight-based bandwidth sharing policy under any network configuration and any set of link distances. Finally, we show the on-line minimum rate renegotiation and weight adjustment options in our feedback control algorithm, which offer further flexibility in network bandwidth sharing for video connections. Copyright © 2000 John Wiley & Sons, Ltd.

BANDWIDTHS; FEEDBACK control systems; ASYNCHRONOUS transfer mode; PACKET switching; BROADBAND communication systems

International Journal of Communication Systems, 2000, Vol 13, Issue 2, p117

1074-5351

Academic Journal