Abstract
Video distributions using TCP (called "TCP streaming") like YouTube have been increased rapidly with the improvement on the speed and capacity of the Internet. Thus, it is an important technical issue to guarantee QoS (quality of service) suitable for TCP streaming. However, it is difficult for the existing IP network to guarantee QoS of the TCP streaming. So far, in order to achieve the QoS enhancement per flow, we have proposed the class-based output buffer control mechanism in QoS-aware router by locally managing only active flows whose backlogged packets remain on the buffer. In this paper, we expand the function of this output buffer control mechanism so as to be suitable for TCP streaming. Specifically, we propose the mechanism which calculates transmission bandwidth and buffer volume preferentially available (called "basic volume") according to active flows' condition estimated by measuring transmitted packets per flow. Furthermore, through computer simulation, the effectiveness of our proposal is verified.
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