隨著智慧裝置的發展，現在的行動裝置皆具有與各種無線通訊連線的技術，如：WLAN、3G、WiMAX和LTE。使用者在異質網路間可以藉由多路徑傳輸（Multipath-TCP）來獲得可靠以及有效率的影音串流（video streaming）。有兩件事情是使用者想要的：第一，隨時隨地在服務與裝置上可以保持最佳的連線。第二，行動裝置可以持續的連線而且可以無縫換手到另一個網路上。 多路徑傳輸（Multipath-TCP）是TCP的延伸，它可以利用多界面來同時傳輸且支援使用者可以移動以及換手到另一個網路。但是，多路徑傳輸有吞吐量（throughput）以及電量損耗的問題。我們必須制定一個機制讓MPTCP可以被運用得更完善，因為同時使用多個界面來傳輸會消耗更多的電量。在這篇論文，我們提出一個動態多路徑傳輸控制機制，讓我們在不同網路之間可以無縫換手，而且當網路品質良好時，只使用一種網路服務。透過實作，此篇論文提出的演算法可以提升吞吐量以及節能（energy efficiency）。;Nowadays, with the evolution of smart devices, mobile nodes are commonly equipped with multiple communication interfaces, for example: WLAN, 3G, WiMAX and LTE. Users and network operators can benefit from multipath TCP to achieve more reliable and efficient video streaming in heterogeneous networks. Two things are the users need. First, it always keeps the best connection in services or devices anywhere at any time. Second, it keeps service continuous and seamless handover to another network interface. Multi-path TCP (MPTCP) is an extension of TCP that allows multiple interfaces to transmit simultaneously. MPTCP can support mobility and handover, but MPTCP has throughput and energy consumption problems. We must make a decision to use MPTCP well. But using several interfaces at the same time would cost more energy consumption. In this thesis, we develop a dynamic MPTCP control mechanism to enable seamless vertical handover during network transition and use a single radio technology when stable. Through the implementation, it can improve throughput and energy efficiency.
