A reliable, adaptive network protocol for video transport
INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 3
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In this paper, we present an adaptive network layer protocol that: (1) minimizes buffer requirement in the network while guaranteeing that packets of VBR encoded video flows will not be lost, and (2) minimizes end-to-end delay and jitter of frames. To achieve the former objective, we utilize receiver-oriented adaptive credit-based flow control algorithm, and derive necessary and sufficient number of buffers that should be reserved for ensuring its reliability. To minimize the end-to-end delay and jitter for VBR encoded video streams, we: (1) present bandwidth estimation techniques which exploit the structure of the video traffic, and (2) define a new fairness criteria for buffer allocation (which is motivated by the delay requirements of video applications) and then present a fair buffer allocation algorithm. To mask the effects of delay jitter on playback continuity, we present a simple technique for adapting the playback point at client sites. We experimentally evaluate this protocol for a wide range of parameters and many network configuration and demonstrate its adaptability. We also compare the performance of the protocol with numerous other schemes and demonstrate its suitability for video transport.