博碩士論文 104522038 詳細資訊




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姓名 黃育凱(Yu-Kai Huang)  查詢紙本館藏   畢業系所 資訊工程學系
論文名稱 跨微營運商之區域化服務遞送 -以即時串流服務為例
(Local Service Delivery in Multiple Micro-Operators-A Case Study of Real-Time Streaming Services)
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摘要(中) 隨著當代行動網路通訊技術的成熟。因行動使用者數量越來越多,帶動無線寬頻的使用量提升。在工業界、企業界、智慧工廠自動化,物聯網( Internet of Things, IoT)的需求越來越多,免執照頻段的無線網路已不敷使用。微營運商 (µO) 就是在這個背景下發展的新興網路服務模式。建置小基地台(Small Cell)溝通設施,來進行區域化服務的遞送。微營運商( Micro Operator , µO )具有可佈署特定區 域特定服務的能力,可管控各 µO 區域的上傳與下載的資料傳輸,只要是場域擁有者皆有機會成為微營運商。
本研究針對區域化服務提出 Cross-domain Network Slicing(CNS)系統,使微營運商用戶可就近存取 µO 的資料,或是特定應用的網路服務需求,也可Tunnel 連結至網際網路的雲端資料中心存取。區域化服務除了可就近提供網路服務減少頻寬資源消耗外,其分散式的區域型服務網路架構可將應用程式、數據資料與服務的運算,由雲端的資料中心節點,移往網路邏輯上的邊緣節點來處理,可降低連網延遲,滿足 5G 網路對改善延遲性的應用需求。 本 論 文 提 出 Desion Tree Based Flow Redirection (DTBFR)機制,藉由蒐集視訊服務伺服器負載資訊,提供給 SDN 控制器針對訊務流重導進行決策。實驗結果顯示僅有 3.2%訊務到資料中心存取服務,顯示本機制在 µO 使用者訊務導向決策上有較好的表現,以 µO 使用者所在區域 µO 為優先、接者是相對近的 µO、最後才會到遠端資料中心存取。
摘要(英)
With the stable development of mobile network communication technique, the utilization of wireless broadband has grown up due to the increasing mobile users.
The unlicensed band has become not enough to be used because of higher requirement in Industry, Enterprise, manufacture automation region, Internet of Things (IoT), etc. As result, Micro operator (μO) proposes one brand-new business model to build a small cell infrastructure for specific local services. The μOs can provide the establishment for deployment of local services and can control & manage the transmission of data uplink and downlink. If you are the owner around area, you have the qualification to be a micro operator.
This research proposed Cross-domain Network Slicing (CNS) system which can make the tenants of μOs directly access the data from nearest region or application of specific network service and also can link to cloud data center accessing data by tunneling. Not only local distributed network infrastructure can decrease the wastage of bandwidth but have the advantage of low delay in application program, data information, and service computing because it can move data from the center node to the end node. Meanwhile, it satisfied the need of 5G network in the future.
This paper proposed a method called Decision Tree Based Flow Redirection (DTBFR). By collecting the information of streaming server loading data can make Software Defined Network (SDN) controller to make the routing decision. Experiment result shows that only the 3.2% traffic workload directed to the data center to access. This approach has better performance in flow redirection, and the priority in this strategy is the μOs who located in this area, and then near the area, and further more are faraway datacenter.
關鍵字(中) ★ 軟體定義網路
★ 網路虛擬化
★ L3穿隧技術
★ C4.5決策樹
關鍵字(英) ★ SDN
★ Decision Tree
★ Network virtualization
★ L3 tunnel
論文目次
第一章 緒論 1
1.1 概要 1
1.2 研究動機 2
1.3 研究目的 4
1.4 章節架構 4
第二章 背景知識與相關研究 6
2.1 軟體定義網路與網路功能虛擬化 6
2.1.1 軟體定義網路(Software Dfined Network) 6
2.1.2 網路功能虛擬化(Network Function Virtualization) 8
2.2 網路虛擬化(Network Virtualization) 9
2.2.1 FlowVisor 10
2.2.2 OpenVirtex 12
2.3 微營運商 (µO) 15
2.4 決策樹演算法 18
2.4.1 決策樹演算法架構 20
2.4.2 決策樹過度學習(Over-fitting) 21
2.5 相關研究之比較 22
第三章 研究方法 25
3.1 系統架構與設計 25
3.1.1 DT模組群 26
3.1.2 Monitor模組群 31
3.1.3 Tunnel模組群 32
3.1.4 Agent模組群 33
3.1.5 Decision模組群 33
3.1.6 Slice模組群 34
3.1.7 LSS模組群 34
3.1.8 Control模組群 35
3.1.9 Front-web模組群 36
3.1.10 End-web模組群 38
3.2 系統運作流程與機制 38
3.2.1 系統假設與定義 38
3.2.2 資料符號表 40
3.2.3 系統模組運作流程 45
3.3 系統的實作 53
第四章 實驗與討論 57
4.1 情境一:微營運商間溝通 57
4.1.1 GRE與VXLAN隧道技術的頻寬測試 57
4.1.2 ICMP封包穿越數個隧道的RTT測試 62
4.1.3 隧道技術與網路虛擬化工具頻寬效能分析 64
4.1.4 動態調整真實網路切片的頻寬 67
4.2 情境二: 網路切片的管理 68
4.2.1 網頁介面建立多種網路切片測試 68
4.2.2 網頁介面動態偵測系統拓樸 73
4.2.3 邏輯網路切片的頻寬測試 74
4.2.4 系統以Big Switch建立路由路徑RTT測試 77
4.3 情境三:區域化服務遞送 80
4.3.1 區域化服務伺服器的狀態偵測 80
4.3.2 區域化服務的訊務重新導向驗證 81
4.3.3 DTBFR機制HTTP requests的錯誤率測試 85
4.3.4 DTBFR機制的系統延遲測試 88
4.3.5 C4.5演算法準確度探討 91
4.3.6 深度神經網路演算法準確度探討 92
第五章 結論及未來研究 94
5.1 結論 94
5.2 研究限制 95
5.3 未來研究 96
參考文獻 97
附錄 103
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指導教授 周立德(Li-Der Chou) 審核日期 2017-8-23
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