QoS Management in Educational Digital Library Environments

  • Authors:
  • Aidong Zhang;Sreenivas Gollapudi

  • Affiliations:
  • Department of Computer Science, State University of New York at Buffalo, Buffalo, NY 14260, USA. azhang@cs.buffalo.edu;Department of Computer Science, State University of New York at Buffalo, Buffalo, NY 14260, USA. gollas-s@cs.buffalo.edu

  • Venue:
  • Multimedia Tools and Applications
  • Year:
  • 2000

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Abstract

Advances in multimedia computing technologies offer new approaches tothe support of computer-assisted education and training within manyapplication domains. Novel interactive presentation tools can bebuilt to enhance traditional teaching methods with more activelearning. Since a variety of user expectations are possible in suchan environment, research must address the incorporation of thesefactors into presentation tools. During an interactivelearning/training process, presentation tools must be able to handlevarious types of delays. A flexibly adjustable quality of service(QoS) should thus be supported. In this paper, we investigate aframework and systematic strategies for supporting the continuous andsynchronized retrieval and presentation of multimedia data streams ina client/server distributed multimedia environment for educationaldigital libraries. Specifically, we establish a practical frameworkfor specifying multimedia objects, tasks, schedules, andsynchronization constraints between media streams. We identify theQoS parameters critical to the support of multimedia presentationsfor learning and training activities. Based on the proposed frameworkand QoS specifications, we develop presentation scheduling and buffermanagement strategies which can enforce the specified QoSrequirements in an educational digital library environment.