Strategies for adaptive smoothing and rebuffering via dynamic network calculus

Authors:
Hui Yang;Stephen D. Patek;Zhenyu Yan
Affiliations:
Department of Systems and Information Engineering, University of Virginia, United States;Department of Systems and Information Engineering, University of Virginia, United States;Department of Systems and Information Engineering, University of Virginia, United States
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2010

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Abstract

This paper proposes an adaptive video smoothing and rebuffering algorithm for video transmission in best-effort, low-bandwidth networks. Our algorithm, which is derived from a ''dynamic'' extension of the network calculus, (1) detects whether playback disruptions are inevitable and, if so, schedules a rebuffering action with minimal rebuffering delay and (2) computes a conservative transmission schedule that ensures continuous playback while minimizing consumption of network available bandwidth. NS-2 simulation results show that, compared to an aggressive transmission strategy, our method can greatly reduce bandwidth consumption and, compared to a simple rebuffering strategy with the same bandwidth consumption, our method can effectively reduce total playback delay while also reducing the number of rebuffering events.