| Summary: | 碩士 === 國立清華大學 === 資訊工程學系 === 103 === The application of video streaming is popular for mobile user and the Ultra-dense Networks (UDN) and High Efficiency WLAN (HEW) become more generally. The motivation of our thesis is to propose a distributed mobility services for efficient popular video delivery over UDN wireless environments. The H.264 SVC and LT codes are both considered and integrated to provide reliable and scalable video services wirelessly.
Our experiments have three phases - allocation phase, distributed decoding phase, mobility serving phase. In the allocation phase, a popular video is encoded by SVC and LT. Then, the coded data are randomly deployed among small-cell stations (SCs) or related attached servers. In the distributed decoding phase, the SCs around the mobile user immediately decodes its own LT coded data and broadcasts them to the mobile user and the neighboring SCs to continue the undone decoding process in parallel. In mobility serving phase, the mobile user can receive data from multiple SCs to achieve the goal of bandwidth aggregation. In the ultra-dense scenarios, our simulations show different results under different position variation. Users may receive the video with different layer. It is up to the number of SCs around the user, more SCs can provide higher layer video with high probability.
|
|---|
