QoS Multimedia Multicasting over Mobile Networks

在Multimedia Broadcast/Multicast Service(MBMS)架構的基礎上，我們針對Universal Mobile Telecommunications System(UMTS)提出了一個支援品質服務且有效率的多媒體群播機制。我們採用了scalable coding的技術，對各種不同的行動裝置提供多種品質的服務。而為了充分利用有線和無線網路的資源，所以在我們提出的方法中，發展出兩種的傳輸模式。我們也在數學分析上做了相關的研究，並實作了相關的實驗來比較我們的方法與3GPP 23.246 MBMS的效能。實驗結果顯示，在有線/無線網路傳輸的效能上，我們的方法優於3GPP 23.246的方法。

Based on multimedia broadcast/multicast service architecture(MBMS), this thesis proposes an efficient QoS-based multicast approach for the Universal Mobile Telecommunications System (UMTS). Our approach adopts the existing scalable-coding technique to provide multiple levels of service quality to diverse mobile devices in the
UMTS system. In this approach, two kinds of transmission modes are developed to utilize fully the network resources for wireline and wireless links. An analytic model is presented to investigate the performance of our approach and the 3GPP 23.246 approach. The numerical results indicate that in terms of transmission costs of core/radio networks, our approach outperforms the 3GPP 23.246 approach.