MPEG-21 based Multimedia Streaming Session Handoff over the 3-tier Network Environment
| Autor: | Chi-Chan Lee, 李奇展 |
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| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 In this thesis, we develop an MPEG-21 based multimedia streaming session handoff mechanism over the 3-tier network environment platform. In the 3-tier Server-Proxy-Client network architecture, the proxy can provide cached and relayed functions to reduce server workload and distribute streaming traffic. In order to satisfy the characteristics of network heterogeneity and client devices' diversity, the proxy should provide different qualities of media streaming using scalable video coding. To achieve network-adaptive and device-adaptive for video streaming, layered proxy cache admission and replacement policies are designed with advances of scalable video coding for the 3-tier Server-Proxy-Client network architecture in this thesis. The proposed layered cache admission and replacement policies can manage the proxy cache in consideration of the quality-of-service and the video popularity. In this thesis, 'ubiquitous streaming' means that a streaming client is allowed to change the streaming session (i) from network A to network B, e.g., from ADSL to 3.5G or from 3.5G to WLAN, and even (ii) from A client device to B client device, e.g., from a desktop to a smart phone, on the run time, i.e., the streaming session keeps continuity when the attached network and the client device are changed. In order to achieve ubiquitous streaming over the 3-tier network architecture, a proxy handoff mechanism is designed to make video playback smoother and reduce the user's waiting time after the session handoff. In our experiments, we exhibit merits and performance results of the proposed cache admission and replacement mechanism. Additionally, we also analysis the experimental results of the proposed multimedia proxy handoff mechanism. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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