基於軟體定義網路與網路服務鏈的動態路 徑調整及伺服器負載平衡;Dynamic Data Path and Servers Load Balance Based on SDN and NSC

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Title:	基於軟體定義網路與網路服務鏈的動態路徑調整及伺服器負載平衡;Dynamic Data Path and Servers Load Balance Based on SDN and NSC
Authors:	黃楚堯;Huang,Chu-Yao
Contributors:	資訊工程學系
Keywords:	軟體定義網路;網路功能虛擬化;網路服務鏈;動態路徑調整;負載平衡;人工蜂群演算法;Software defined network;Network function virtualization;Network service chain;dynamic data path;load balance;artificial bees algorithm
Date:	2014-08-29
Issue Date:	2014-10-15 17:11:17 (UTC+8)
Publisher:	國立中央大學
Abstract:	隨著網路功能需求增加，網路功能虛擬化（Network Function Virtualization，簡稱NFV）的出現為傳統的電信網路打開了另外一扇大門。現在，國內外的運營商們開始思考，如何將通過引入IT 增加電信網路的開放性和通用性，從而更好地應對不斷升級的業務競爭。一直以來，電信網路採用的都是專有私用的網路設備，雖然確保了網路的高效穩定，但同時也存在著系統封閉、靈活性差等問題。相比於IT 領域的開放與通用，電信網路儼然還是相當封閉的，NFV 為電信網路融入IT 基因提供了可能。目前，來自全球範圍內的眾多運營商都在積極探索NFV的適用場景和業務需求，而一些NFV 案例也在悄然落地。網路服務鏈（Network Service Chain，簡稱NSC）此想法是為了增加功能靈活性和成本效應，為未來營運商網路服務佈署的理念。其實網路服務鏈此想法並不是一個新的想法，只是為了打造一條網路服務鏈需要花上大量的時間和成本，因為各家廠商存在系統的封閉性、命令語法的差異，一旦整合了不同廠商的硬體設備就會發生錯誤，在SDN和NFV 兩樣技術出現之後NSC 的議題就漸漸受到重視，因為這兩樣的技術可以使得NSC 的設定與更新更加容易。　　　　在實驗結果中顯示所提之ABCNSC 演算法在建立NSC 時比起Brute-force 演算法減少了2169.04%的執行時間，也從另一個實驗結果顯示封包在通過 ABCNSC 演算法所建立的NSC 時所花的時間比起brute-force 演算法多了 27.84%，雖然其結果與brute-force 算出來的最佳解有落差，但是此落差仍為可被接受的誤差，在綜觀兩種結果下ABCNSC 更符合網路隨時會變動的情況。;With increasing demand of network function, the techonology of network function virtualization (NFV) appeared for traditional telecom network. Now, domestic and overseas telecom operators think how to make telecom network more open and common by using information technology, in order to cope the escalating competition. Traditional telecom network uses exclusive switches. It can ensure the stability, but it make the system closed and inflexible. NFV can join the advantage of IT into traditional telecom network. Currently, many telecom operators are searching for what is NFV suited for use, and some use cases are implemented. Network service chain (NSC) is used for increased flexibility and decreased costs, and it is an idea for future telecom network. In fact, NSC is not a new idea. Building a service chain to support a new application will take a great deal of time and effort, because different telecom operators use their own systems and command syntaxs. So using the switch from different telecom operators may make some errors. After SDN and NFV technologies appeared, NSC is gradually emphasized. These two techonologies can make NSC upgrade much simpler. The experimental results show that the execution time of proposed ABCNSC mechanism is 2169.04% faster than brute-force. Another experiment shows the time a packet pass through NSC by using ABCNSC is 27.84% more than by using brute-force. Even though the result is worse the optimal solution obtained by brute-force, it is closed to the optimal solution.
Appears in Collections:	[Graduate Institute of Computer Science and Information Engineering] Electronic Thesis & Dissertation

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