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    Please use this identifier to cite or link to this item: http://ccur.lib.ccu.edu.tw/handle/A095B0000Q/805

    Title: 在P4網路中虛擬演進封包核心網路的設計與實作;Design and Implementation of Virtualized Evolved Packet Core in P4 Networks
    Authors: 陳昱愷;CHEN, YU-KAI
    Contributors: 通訊工程研究所
    Keywords: 虛擬演進數據核心網路;網路功能虛擬化;軟體定義網路;P4交換機;vEPC;NFV;SDN;P4 Switch
    Date: 2018
    Issue Date: 2019-07-17 10:47:56 (UTC+8)
    Publisher: 通訊工程研究所
    Abstract: 在傳統4G電信核心網路的架構中,專有設備價格不斐並缺乏佈署彈性,網路及運算資源調度困難。電信核心網路必須接受成千上萬用戶註冊,一台伺服器可能無法負擔,勢必佈署多台。若有新的應用服務導入,越多的硬體設備就會有越高的複雜度與整合測試耗時過長的問題,難以即時推出新服務。在網路功能虛擬化(Network Function Virtualization, NFV)的發展下,硬體資源虛擬化為多個虛擬機(Virtual Machine, VM),傳統專用4G核心網路的相關網路設備功能以軟體的方式虛擬化為虛擬演進數據核心網路 (virtualized Evolved Packet Core, vEPC),將其功能安裝在商用伺服器上的VM之中,大幅提升各EPC軟體網路元件部署與更新的敏捷性,並能實現依照需求動態彈性擴充。軟體定義網路(Software Defined Network , SDN)將傳統網路中Control Plane與Data Plane分離,讓網路控制與管理可程式化,網路管理權可以交由控制器(SDN Controller)控管,達到彈性化與集中管理效益。P4(Programming Protocol-Independent Packet Processors)語言可自行定義交換機對封包的處理邏輯,讓P4交換機中的Data Plane可程式化, 解決OpenFlow無法編程交換機處理封包的邏輯,同時改善目前SDN編程能力不足的問題。因此本研究利用NFV與SDN搭配P4 Switch實作出一套vEPC,包含vMME(virtualized Mobility Management Entity) 、vSGW(virtualized Serving Gateway)與EPC Data Plane。vSGW實現SGW Control Plane功能與部份PGW Control Plane功能,而EPC Data Plane則使用P4 Switch實作。最後本系統接上小型基地台(Small Cell)與vHSS(virtualized Home Subscriber Server)實現EPC完整功能,包括Attach、Release、Service Request、Tracking Area Update、Handover與Detach。
    In 4G Evolved Packet Core (EPC) network, the cost of dedicated EPC function devices are so high. The lack of deployment flexibility increased the difficulty of resource allocation and network scheduler. In the general case, for handling the registration of thousands of users and massive data forwarding an EPC needs many dedicated EPC function devices. Therefore, providing news services needs more hardware devices in the system and increases the complexity and longer testing time. It is difficult to launch new services immediately. In the development of Network Function Virtualization (NFV), the resources of physical machines are virtualized into many Virtual Machines (VM). Traditional 4G core network functions is virtualized in Virtualized Evolved Packet Core (vEPC) and being installed in VMs inside commercial servers. vEPC improves the agility of deployment and update various EPC software network components, realize the dynamic expansion according to demand. A Software Defined Networking (SDN) architecture defines how a software-based technologies and commodity networking hardware that separates the SDN control plane and the SDN data plane of the networking stack. SDN controller provides a centralized view of the entire network, making it easier to centralize enterprise management and provisioning. Using Programming Protocol-Indecent Packet Processor (P4) language, we can define the processing logic of switch, making the Data Plane in switches programmable. This solves the problem that packet switching logic cannot be programmed in OpenFlow switches and improves the insufficiency of programmability of SDN data plane.Therefore, we use NFV and SDN with P4 switches to implement a vEPC including virtualized Mobility Management Entity (vMME), virtualized Serving Gateway (vSGW), and the Data Plane of EPC. We implement vSGW, including SGW Control Plane function and part of the PGW Control Plane function. EPC Data Plane is implemented with P4 Switches. Finally, we connect base stations, virtualized Home Subscriber Server (vHSS) to our system, and achieve the full functions of EPC including Attach, Release, Service Request, Tracking Area Update, Handover, and Detach.
    Appears in Collections:[通訊工程研究所] 學位論文

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