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Conceptual design of load balanced streaming of multimedia data within shared web applications
(2011)
In this master's thesis it has been researched the possibility of a network of shared web applications in a server-supported (hybrid) peer-to-peer network where peers retransmit specified parts of the progressively download (streamed) multimedia data, with focus on economically bandwidth usage. A conceptual design of a real-world peer-to-peer video-on-demand service, controlled by a central server, was developed, including a payment procedure for commercial use. Different network overlay scenarios were proposed and their advantages and disadvantages were discussed. Bandwidth calculations have supported those predications. Algorithms for dynamically handling changes in the network structure were developed. Communication protocols were conceptualized accordant to the needs of the proposed shared applications. Methods for keeping the quality of experience high were discussed. A zipper mode, higher-level slice structure for the data was proposed, and enhanced to a multiple-stream system for sending and receiving data. Error and data loss handling procedures were designed.
Die vorliegende Arbeit beschäftigt sich mit der Konzeption und Implementierung eines geeigneten Sicherheitskonzepts für ein hochschulinternes Portal zur Verwaltung von Modulhandbüchern auf der Basis des Content Management Systems Plone. Im Mittelpunkt stehen einerseits die Berechtigungen, und andererseits der Einsatz der in Plone zur Verfügung gestellten Workflow-Technologie. Weiterhin wird die Einpassung in das vorhandene System behandelt.