臺灣博碩士論文加值系統

隨著第五代行動通訊網路(5G)發表，網路切片是 5G 中的一項關鍵技術，根據不同應用場景提供客製化的網路服務，如混合實境、遠端醫療、車聯網等，分別需要滿足大頻寬、低延遲、高可靠度等特性，因此如何有效地分配網路資源以保障每個網路切片的服務品質(QoS)，將是本論文主要探討的問題。
本研究中，使用 OpenStack 雲端系統的虛擬化環境，進行實驗平台的搭建，並利用Tacker 提供的網路功能虛擬化技術(NFV)，部署網路切片。在服務品質的保障上，使用ONOS Controller 與虛擬交換器管理網路資源，並通過分層令牌桶設置切片的優先度與頻寬大小，確保每個切片能夠獲得服務所需的吞吐量與延遲穩定性。我們利用軟體定義無線電設備 USRP 搭建實體的 5G 基地台，UE 裝置使用實體手機，通過 USRP 發送的 5G 頻段訊號連接上網路切片，以驗證實驗架構的可行性。

With the advent of the fifth-generation mobile communication network (5G), network slicing has become a key technology in 5G, providing customized network services based on different application scenarios, such as mixed reality, telemedicine, and vehicle-to-everything (V2X). Each of these applications requires specific characteristics, such as high bandwidth, low latency, and high reliability. Therefore, how to effectively allocate network resources to ensure the Quality of Service (QoS) for each network slice is the primary focus of this thesis.
In this study, we utilize the virtualization environment provided by the OpenStack cloud system to build the experimental platform and deploy network slices using the network functions virtualization (NFV) technology provided by Tacker. For QoS assurance, we use the ONOS Controller and virtual switches to manage network resources, and we configure the priority and bandwidth allocation for each slice using a hierarchical token bucket (HTB) mechanism to ensure that each slice can achieve the required throughput and stable latency. We also use software-defined radio (SDR) equipment, USRP, to set up a physical 5G base station. The user equipment (UE) is connected to the network slices via 5G signals transmitted by USRP using physical mobile devices to verify the feasibility of the experimental architecture.

摘要............................................................................................................i
Abstract......................................................................................................ii
誌謝..........................................................................................................iii
目錄..........................................................................................................iv
表目錄...................................................................................................... vi
圖目錄.....................................................................................................vii
第一章 緒論............................................................................................ 1
1.1 研究背景與動機...............................................................................................................1
1.2 研究目的..........................................................................................................................1
1.3 論文內容大綱.................................................................................................................2
第二章 相關技術探討.......................................................................... 3
2.1 第五代行動通訊網路.....................................................................................................3
2.2 5G 核心網路...................................................................................................................3
2.3 NFV Framework..............................................................................................................5
2.4 OpenStack.......................................................................................................................6
2.5 Tacker.............................................................................................................................6
2.6 網路切片........................................................................................................................7
2.7 網路切片的相關研究.....................................................................................................8
2.8 軟體定義網路.................................................................................................................9
2.9 ONOS.............................................................................................................................10
2.10 Open vSwitch................................................................................................................11
2.11 srsRAN Project..............................................................................................................11
2.12 USRP............................................................................................................................11
第三章 研究方法與系統建置............................................................... 13
3.1 研究方法........................................................................................................................13
3.2 實驗平台架構.................................................................................................................14
3.2.1 雲端環境建置..........................................................................................................15
3.2.2 網路切片部署..........................................................................................................17
3.2.3 QoS 實作與管理......................................................................................................18
3.2.4 基地台與服務端部署...............................................................................................19
3.3 UE 註冊流程...................................................................................................................21
3.4 UE 請求服務時序圖.......................................................................................................22
第四章 實驗結果與分析...................................................................... 23
4.1 系統驗證........................................................................................................................23
4.1.1 核心網路運作情形...................................................................................................25
4.1.2 gNB 運作情形..........................................................................................................27
4.1.3 UE 運作情形............................................................................................................29
4.2 實驗結果........................................................................................................................30
4.2.1 實驗一、網路切片之頻寬限制...............................................................................31
4.2.2 實驗二、網路切片之頻寬保障...............................................................................33
4.2.3 實驗三、網路切片之可靠度保障............................................................................35
第五章 結論與未來展望...................................................................... 37
參考文獻.................................................................................................. 38
Extended Abstract.................................................................................... 39

[1] 3GPP, "Release 15," [Online]. Available: https://www.3gpp.org/specificationstechnologies/releases/release-15. [Accessed 28 6 2024].
[2] 3GPP, "TS 23.501," [Online]. Available: https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3144. [Accessed 2024 6 28].
[3] ETSI, "ETSI GS NFV 002 V1.2.1," 12 2014. [Online]. Available: https://www.etsi.org/deliver/etsi_gs/nfv/001_099/002/01.02.01_60/gs_nfv002v010201p.pdf. [Accessed 25 6 2024].
[4] "THE OPENSTACK LANDSCAPE," [Online]. Available: https://www.openstack.org/software/. [Accessed 16 7 2024].
[5] "OpenStack Tacker," [Online]. Available: https://wiki.openstack.org/wiki/Tacker. [Accessed 28 6 2024].
[6] B. Chatras, U. S. Tsang Kwong and N. Bihannic, "NFV enabling network slicing for 5G," in 2017 20th Conference on Innovations in Clouds, Internet and Networks (ICIN), Paris, France, 2017.
[7] Sheng Chen, Chung-Nan Lee, and Ming-Feng Lee, "Realization of 5G Network Slicing Using Open Source Softwares," in 2020 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), Auckland, New Zealand, 2020.
[8] K. -L. Lee, C. -N. Lee and M. -F. Lee, "5G is Real: Evaluating the Compliance of the 3GPP 5G New Radio System With the ITU IMT-2020 Requirements," in 2021 AsiaPacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), Tokyo, Japan, 2021.
[9] Pei-Hsuan Lee, Fuchun Joseph Lin, "Tackling IoT Scalability with 5G NFV-Enabled Network Slicing," Advances in Internet of Things, vol. 11, no. 3, pp. 123-139, 2021.
[10] N. McKeown, T. Anderson, H. Balakrishnan, G. Parulkar, L. Peterson, J. Rexford, S. Shenker, and J. Turner, "OpenFlow: enabling innovation in campus networks," ACM SIGCOMM Computer Communication Review, vol. 38, no. 2, pp. 69-74, 2008.
[11] D. Kreutz, F. M. V. Ramos, P. E. Veríssimo, C. E. Rothenberg, S. Azodolmolky, and S. Uhlig, "Software-Defined Networking: A Comprehensive Survey," Proceedings of the
IEEE, vol. 103, no. 1, pp. 14-76, Jan. 2015.
[12] "Open Network Operating System (ONOS)," [Online]. Available: https://opennetworking.org/onos/. [Accessed 6 25 2024].
[13] "openvswitch," [Online]. Available: https://www.openvswitch.org/. [Accessed 1 7 2024].
[14] "free5GC," [Online]. Available: https://free5gc.org/. [Accessed 20 6 2024].
[15] Y.-H. Chai and F. J. Lin, “Evaluating Dedicated Slices of Different Configurations in 5G Core,” Journal of Computer and Communications, pp. 55-72, 2021.