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Video placement and configuration of distributed video servers on cable TV networks (2000)
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| Venue: | Multimedia Systems |
| Citations: | 13 - 2 self |
BibTeX
@ARTICLE{Vassilakis00videoplacement,
author = {Constantinos Vassilakis and Michael Paterakis and Peter Triantafillou},
title = {Video placement and configuration of distributed video servers on cable TV networks},
journal = {Multimedia Systems},
year = {2000},
volume = {8},
pages = {92--104}
}
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Abstract
A large-scale, distributed video-on-demand (VOD) system allows geographically dispersed residential and business users to access video services, such as movies and other multimedia programs or documents on demand from video servers on a high-speed network. In this paper, we first demonstrate through analysis and simulation the need for a hierarchical architecture for the VOD distribution network.We then assume a hierarchical architecture, which fits the existing tree topology used in today's cable TV (CATV) hybrid fiber/coaxial (HFC) distribution networks. We develop a model for the video program placement, configuration, and performance evaluation of such systems. Our approach takes into account the user behavior, the fact that the user requests are transmitted over a shared channel before reaching the video server containing the requested program, the fact that the input/output (I/O) capacity of the video servers is the costlier resource, and finally the communication cost. In addition, our model employs batching of user requests at the video servers. We study the effect of batching on the performance of the video servers and on the quality of service (QoS) delivered to the user, and we contribute dynamic batching policies which improve server utilization, user QoS, and lower the servers' cost. The evaluation is based on an extensive analytical and simulation study.
Keyphrases
video server cable tv network video placement distributed video server hierarchical architecture user request vod distribution network dynamic batching policy communication cost high-speed network video program placement input output tree topology access video service distribution network user behavior requested program performance evaluation user qos simulation study server utilization business user cable tv multimedia program extensive analytical
