| dc.description.abstract | Date center network (DCN) is widely used with the development of cloud computing technology in recent years. In the multi-service environment, the client calls for service from multiple servers at the same time. Because of the retransmission mechanism of TCP, the transmission of network may be easily collapsed, which is called TCP incast.
In this thesis, the performance of real-time video among multiple receivers is studied based on the cloud computing environment. In the aspect of transmission, the concept of digital fountain is adopted, and UDP is used instead of TCP as the transport protocol. And LT-Code is applied to achieve reliable data transmission. In addition, employing scalable video coding (SVC), video is divided into the base layer and the enhancement layer to provide different kinds of quality of service (QoS). Aiming at the real time characteristic of each frame in video, we propose a multicast SVC method based on the digital fountain in cloud. The proposed method could improve the network performance and provide better QoS for clients. Finally, we design and implement an experiment using hierarchical network in order to compare the different performances in different environments by using the method.
From the experimental results in this thesis, it shows that the system network performance and cilents’ QoS can be improved efficiently when giving up the clients with poor network condition if receivers have different link capacities. On the other hand, when receivers have the same link capacity, all the clients’ basic QoS could be guaranteed. | en_US |