臺灣博碩士論文加值系統

由於內容的產生與傳播應用程式越來越熱門，例如：於Youtube影音平台分享影片和社交網路，網際網路隨之快速成長也成為能源消耗的主要原因之一，所以能源消耗也成為主要角色。近來新提出的內容為中心的網路(以下簡稱 CCN)，在於重新設計新的網路架構，CCN 以被命名的資料做為主要元素，已吸引廣泛的研究興趣。在CCN當中，內容的命名都有其唯一性，而用戶端可以透過興趣封包(Interest Packet)對內容提出請求。CCN中的路由器(以下簡稱 CCNR)可以處理興趣封包將訊息轉發給原始內容伺服器，而原始內容伺服器將回傳內容封包(Data packet)給用戶端。在回傳的過程中，資料所經過之 CCNR將會緩存內容封包，方便回傳其內容以便服務日後重複的興趣封包。
在能源效率方面，CCN減少了傳輸方面的耗能，但伴隨而來的是緩存的能耗。本篇論文主要研究 CCN 上考慮能源效率之緩存管理。首先，我們將計算一組門檻值，門檻值是表示CCNR 是否可透過緩存資料內容達成節能的判斷依據，並研發一套簡易的方法，設法減少重複性的內容。接著本研究提出一套基於內容請求率與請求分支度的緩存取代策略，我們定義分支度為所接收的興趣封包是來自於多少個不同的鄰居節點。最後我們將與其他方法做比較並且透過模擬實驗來證明我們的效能

With the popularity of content production and dissemination applications such as sharing videos on YouTube and social networking services, Internet has been rapidly growing and becoming one of the leading players in energy consumption. Recently, Content-centric Net-working (CCN), whose aim is to redesign the Internet architecture with the named-data as the primary element in the novel networking paradigm, has attracted wide research interests. In CCN, content items are uniquely identified by hierarchical names and requested by receivers via Interest packets. The CCN enabled routers (CCNR) will handle and forward the Interest packets toward the original content servers and send the data packets back to the receivers. The data packets can be cached by any CCNR so as to serve future redundant interest packets.
In terms of energy efficiency, CCN requires less transport energy but additional energy to provide a caching capability at every CCNR. In this paper, we study on the issues of energy efficient caching for CCN architecture. We first analyze the threshold level from which caching content starts to be beneficial for a CCNR and develop a simple strategy to reduce redundant data. We then propose a cache replacement policy based on the content request rate and the degree of branching which is defined as the number of different neighboring nodes from which the Interest packets are received. Furthermore, we demonstrate the effectiveness of our proposed caching scheme by simulations.

目錄
致謝 II
概論 III
Abstract IV
表目錄 VI
圖目錄 VII
第一章 緒論 1
1.1 研究背景 1
1.2 研究範圍與假設 2
1.3 研究目的 3
第二章 背景與研究動機 4
第三章 系統簡介 6
3.1 網路架構 6
3.2 系統假設 7
3.3 緩存點選擇 7
3.3.1 門檻值計算 8
3.3.2 建議位元回傳 8
3.3.3 緩存判斷 9
3.4 取代策略 10
第四章 模擬與實驗 12
4.1 模擬案例說明 13
第五章 結論與未來研究 17
參考文獻 18

參考文獻
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