Abstract
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.
Original language | English (US) |
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Pages (from-to) | 117-143 |
Number of pages | 27 |
Journal | International Journal of Communication Systems |
Volume | 13 |
Issue number | 2 |
DOIs | |
State | Published - Mar 2000 |