資訊工程學系

Permanent URI for this communityhttp://rportal.lib.ntnu.edu.tw/handle/20.500.12235/60

本系前身「資訊教育學系」成立於民國七十四年,首先招收大學部學生,民國九十年成立資訊工程研究所碩士班,而後於民國九十五年進行系、所調整合併為「資訊工程學系」;並於九十六年成立博士班。本系目前每年約招收大學部四十餘人,碩士班六十餘人,博士班約五人,截至民國一百零四年十一月止,總計現有大學部一百九十多人,碩士班一百二十多人,博士班二十三人,合計學生人數約為三百三十多位。

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    增加資料命名網路中轉送資訊庫的搜尋公平性
    (2015) 傅競永; Fu, Jing-Yung
    新一代網路架構資料命名網路的出現,將傳統以 IP 位址傳送資料轉變成以命名為基礎的連線方式,讓使用者能夠以描述資料內容的方式獲取自己想要的資料。然而隨著物聯網的出現,將會有更多的資訊以及內容在網路當中流通,但是也因為資料命名網路並沒有統一的命名方式和限制內容長度,因此在物聯網當中的眾多應用結合之下,將會造成每一個名字在路由器當中搜尋所需要的時間會有極大的差異,而這樣的差異會使得每一個使用者必須經過非常不一樣的時間才能夠獲取資料,而產生不公平的現象。因此我們針對路由器當中 FIB 的搜尋提出一個方法 DePT (Dispersed eminent Patricia Trie), 其結合兩種演算法的優點去解決在路由器當中搜尋不公平的現象,這個方法除了能夠使得每一個資料名稱在路由器中能夠更公平的搜尋之外,同時也能夠減少搜尋所花費的時間以增加搜尋速率。最後也因為使用也別於其他研究所提到的 Patricia Trie 作為資料結構,所以也比較節省記憶體空間,進一步的降低硬體上的負擔。
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    Streaming with Real Bitrates and Solving Bandwidth Competition on Bottleneck in DASH
    (2016) 王明宇; Wang, Ming-Yu
    HTTP adaptive streaming is increasingly popular in multimedia delivery nowadays. The nature of HTTP provides easy deployment to content provider and chunk-based delivery enables dynamic adaption of video quality to varying network bandwidth. In this paper, we address two topics in HTTP adaptive streaming. First is the impact of bitrate disparity. In the previous work, it shows that the advertised bitrates by manifest file and the actual bitrates are significantly different. The result of inaccurate estimation causes buffer oscillations or even buffer underrun because clients frequently select higher bitrates than the network bandwidth. To employ the extensibility feature of DASH syntax, we present a systematic method for selecting the segment which real bitrate is the closest one to the given estimated throughput. The second topic is the well-known bandwidth competition on the bottleneck. We adopt logistic function to estimate bandwidth while using it to detect occurrences of bandwidth oscillations due to competition. We propose an algorithm written on client side to stabilize the requested bitrates in competition interval. The experiments show that our solutions stabilize client behavior in competition state and streaming with real bitrates improves buffer oscillations.