Performance Improvement of Multimedia Contents Delivery Network and its extension to Ubiquitous Network

近年来，多媒体内容分发已经成为一个重要的问题。然而，如何在保证服务质量、负载均衡和高效带宽的前提下提供内容，一直没有得到解决。为此，本研究报告提出了以下方法：1)基于一致性控制的内容复制协议；2)基于混合控制和P2P网络的负载均衡协议；3)改进混合TCP拥塞控制中的RTT-公平性。

Recently multimedia contents delivery has become an important issue. However, how to deliver contents with the guaranteed QoS, load balance and efficient bandwidth has not been resolved. Therefore, this research report proposed the following methods: 1) Protocol for contents replication based on consistency control, 2) Protocol for load balance based on hybrid control and P2P networks, 3) Improvement of RTT-Fairness in Hybrid TCP Congestion Control.