軟體定義網路下服務品質管理系統設計與實作

在電腦網路中確保使用者的服務品質，是一個重要的議題。由於軟體定義網路的崛起，其透過控制層和資料層的分離，使得彈性化的網路管理能得以實現。因此我們基於軟體定義網路的架構，設計並實作一個服務品質保證系統，使得使用者連結上我們的系統，能得到一定的頻寬保證。系統中的使用者會先經過身分認證系統進行認證，確認身分後根據優先權來分配到不同的類別。我們提出一個頻寬配置演算法，在系統中定義多個類別，不同的類別會有不同的頻寬限制和頻寬的分配。實驗結果顯示，針對不同的使用者和佇列，我們能給予特定的頻寬需求及頻寬限制，亦能動態調整頻寬大小以符合整體系統需求。另外，透過整合一個虛擬遊戲平台，藉由頻寬的配置及速率限制，能反應出不同的遊戲延遲特性，藉此來展現我們的系統可以符合我們的設定需求。

關鍵字

頻寬管理；軟體定義網路；服務品質保證

並列摘要

To ensure the quality of service (QoS) in computer networks is an important issue until now. Since the emergence of software defined networks (SDN) which decoupled the control plane and data plane has made networking management more flexible than ever before. In this thesis, we design and implement a QoS system based on the SDN architecture. We define a network wide class of services as well as data-rate limitation mechanisms through a given network of the switches and wireless access points. The users are classified as different classes according to their priorities. A bandwidth allocation algorithm is proposed to satisfy as many requests of users as possible. Experimental results show that our QoS system can guarantee a specific bandwidth for particular users to protect their bandwidth requests. We also integrate our QoS system with the virtual set-top boxes system to test the stability of our QoS system. The results show that we can dynamically adjust the bandwidth request of different classes of users to maintain the high quality of service for high priority users.

並列關鍵字

Bandwidth Management ； Quality of Service ； Software Defined Networking

參考文獻

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軟體定義網路下服務品質管理系統設計與實作

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