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研究生: 陳禹同
Yu-Tung Chen
論文名稱: OAI 中央單元 (CU) 與 OSC 分散單元 (DU) 之整合
Integration of OAI Central Unit (CU) and OSC Distributed Unit (DU)
指導教授: 鄭瑞光
Ray-Guang Cheng
口試委員: 鄭瑞光
Ray-Guang Cheng
王瑞堂
Jui-Tang Wang
呂政修
Jenq-Shiou Leu
曾建超
Chien-Chao Tseng
許獻聰
Shiann-Tsong Sheu
學位類別: 碩士
Master
系所名稱: 電資學院 - 電子工程系
Department of Electronic and Computer Engineering
論文出版年: 2022
畢業學年度: 110
語文別: 英文
論文頁數: 63
中文關鍵詞: 中央單元分散單元
外文關鍵詞: Central Unit, Distributed Unit
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  • O-RAN 軟體社群 (OSC) 的成立是為了依據 O-RAN 聯盟定義的架構 和規範研發開放式無線電接入網絡 (RAN) 的軟體參考實現方案。在 OSC 開發項目中,O-RAN 中央單元 (O-CU) 項目由於缺乏貢獻資源而停止開 發。本文旨在通過利用 OAI 軟體聯盟 (OSA) 開發的 OAI 中央單元 (OAI CU) 來補足此差距。我們演示了整合 OSA 開發的 OAI CU 和 OSC 開發 的 OSC O-RAN 分佈式單元 (OSC O-DU) 所需的步驟。搭建實驗平台來 驗證論文的有效性。


    The O-RAN Software Community (OSC) was established to develop a software reference implementation of the open radio access network (RAN) following the architecture and specifications defined by the O-RAN Al- liance. Among the OSC projects, the O-RAN central unit (O-CU) project was halted due to a lack of contributor resources. This paper aims to bridge the gap by leveraging the OAI central unit (OAI CU) developed by the OpenAirInterface Software Alliance (OSA). We demonstrate the steps re- quired to integrate the OAI CU developed by OSA and the OSC O-RAN distributed unit (OSC O-DU) developed by OSC. Experimental platform was built to verify the effectiveness of the paper.

    Recommendation Letter . . . . . . . . . . . . . . . . . . . . . . . . i Approval Letter . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii Abstract in Chinese . . . . . . . . . . . . . . . . . . . . . . . . . . iii Abstract in English . . . . . . . . . . . . . . . . . . . . . . . . . . iv Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . . v Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi List of Algorithms . . . . . . . . . . . . . . . . . . . . . . . . . . . xii 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Related Work . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 Overview of CU-DU Split . . . . . . . . . . . . . . . . . 6 2.2 F1 Interface . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 O-CU and O-DU . . . . . . . . . . . . . . . . . . . . . . 9 3 System Architecture . . . . . . . . . . . . . . . . . . . . . . . . 15 3.0.1 OAI CU Software Module . . . . . . . . . . . . . 16 3.0.2 OSC O-DU High Software Module . . . . . . . . 17 4 Proposed Method . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.1 Preliminaries . . . . . . . . . . . . . . . . . . . . . . . . 20 4.2 CU-DU Integration . . . . . . . . . . . . . . . . . . . . . 23 4.2.1 F1 Setup . . . . . . . . . . . . . . . . . . . . . . 23 4.2.2 gNB-DU Configuration Update . . . . . . . . . . 25 4.2.3 RRC Message Transfer . . . . . . . . . . . . . . . 27 4.2.4 UE Context Setup . . . . . . . . . . . . . . . . . 30 4.2.5 Transfer of Downlink User Data . . . . . . . . . . 32 5 Experiment Results . . . . . . . . . . . . . . . . . . . . . . . . 34 5.1 Scenario I . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.2 Scenario II . . . . . . . . . . . . . . . . . . . . . . . . . . 41 6 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Letter of Authority . . . . . . . . . . . . . . . . . . . . . . . . . . 50

    [1] L. Bonati, M. Polese, S. D’Oro, S. Basagni, and T. Melodia, “Open, programmable, and virtualized
    5g networks: State-of-the-art and the road ahead,” Computer Networks, vol. 182, p. 107516, 2020.
    [2] 3GPP, TS 38.401 NG-RAN; Architecture description, Jul. 2022. Rev. 17.1.1.
    [3] M. Polese, L. Bonati, S. D’Oro, S. Basagni, and T. Melodia, “Understanding o-ran: Architecture,
    interfaces, algorithms, security, and research challenges,” 2022.
    [4] O-RAN Alliance, “O-RAN ALLIANCE e.V.” https://www.o-ran.org/.
    [5] Small Cell Forum, “Small Cell Forum –Accelerating small cell adoption.” https://www.
    smallcellforum.org/.
    [6] O-RAN Working Group 1, O-RAN Architecture Description. O-RAN Alliance, Mar. 2022. Rev. 06.00.
    [7] S. Niknam, A. Roy, H. S. Dhillon, S. Singh, R. Banerji, J. H. Reed, N. Saxena, and S. Yoon, “Intelligent
    o-ran for beyond 5g and 6g wireless networks,” 2020.
    [8] L. Bonati, S. D’Oro, M. Polese, S. Basagni, and T. Melodia, “Intelligence and learning in o-ran for
    data-driven nextg cellular networks,” IEEE Communications Magazine, vol. 59, no. 10, pp. 21–27,
    2021.
    [9] B. Brik, K. Boutiba, and A. Ksentini, “Deep learning for b5g open radio access network: Evolution,
    survey, case studies, and challenges,” IEEE Open Journal of the Communications Society, vol. 3,
    pp. 228–250, 2022.
    [10] R. S. Sameer Kumar Singh and B. Kumbhani, “The evolution of radio access network towards open-
    ran: Challenges and opportunities,” in 2020 IEEE Wireless Communications and Networking Confer-
    ence Workshops (WCNCW), pp. 1–6, 2020.
    [11] J. S. Lee, J. Park, J. Choi, and M.-S. Lee, “Design of a management plane for 5g open fronthaul inter-
    face,” in 2020 International Conference on Information and Communication Technology Convergence
    (ICTC), pp. 946–948, 2020.
    [12] H. Kumar, V. Sapru, and S. K. Jaisawal, “O-ran based proactive anr optimization,” in 2020 IEEE
    Globecom Workshops (GC Wkshps, pp. 1–4, 2020.
    [13] A. Vlahov, V. Poulkov, and A. Mihovska, “Analysis of open ran performance indicators related to
    holographic telepresence communications,” in 2021 24th International Symposium on Wireless Per-
    sonal Multimedia Communications (WPMC), pp. 1–5, 2021.
    [14] 3GPP, TS 38.460 NG-RAN; E1 general aspects and principles, Apr. 2022. Rev. 17.0.0.
    [15] 3GPP, TS 38.470 NG-RAN; F1 general aspects and principles, Jul. 2021. Rev. 16.5.0.
    [16] 3GPP, TS 38.420 NG-RAN; Xn general aspects and principles, Jun. 2022. Rev. 17.1.0.
    [17] 3GPP, TS 38.410 NG-RAN; NG general aspects and principles, Jun. 2022. Rev. 17.1.0.
    [18] O-RAN Working Group 2, O-RAN Working Group 2 (Non-RT RIC and A1 interface WG) A1 interface:
    General Aspects and Principles. O-RAN Alliance, Oct. 2021. Rev. 02.03.
    [19] O-RAN Working Group 10, O-RAN Operations and Maintenance Interface Specification. O-RAN
    Alliance, Mar. 2022. Rev. 06.00.
    [20] O-RAN Working Group 6, O-RAN O2 Interface General Aspects and Principles. O-RAN Alliance,
    Mar. 2022. Rev. 01.02.
    [21] O-RAN Working Group 3, O-RAN Working Group 3 Near-Real-time RAN Intelligent Controller Ar-
    chitecture E2 General Aspects and Principles. O-RAN Alliance, Mar. 2022. Rev. 02.01.
    [22] O-RAN Working Group 4, O-RAN Working Group 4 (Open Fronthaul Interfaces WG) Control, User
    and Synchronization Plane Specification. O-RAN Alliance, Mar. 2022. Rev. 08.00.
    [23] O-RAN Software Community, “O-RAN Software Community (SC).” https://o-ran-sc.org/.
    [24] O-RAN Software Community, “O-RAN Software Community Wiki.” https://wiki.o-ran-sc.
    org/.
    [25] O-RAN Working Group 8, O-RAN Working Group 8 Base Station O-DU and O-CU Software Archi-
    tecture and APIs. O-RAN Alliance, Mar. 2022. Rev. 05.00.
    [26] OpenAirInterface Software Alliance, “OpenAirInterface | 5G software alliance for democratising
    wireless innovation.” https://openairinterface.org/.
    [27] Software Radio Systems, “Prototype homepage for SRS.” https://www.srs.io/.
    [28] 3GPP, TS 38.801 Study on new radio access technology: Radio access architecture and interfaces,
    Apr. 2017. Rev. 14.0.0.
    [29] R. Forum, “Exploring functional splits in 5g ran: Tradeoffs and use cases,”
    RCR Wireless News, 2021. https://www.rcrwireless.com/20210317/5g/
    exploring-functional-splits-in-5g-ran-tradeoffs-and-use-cases-reader-forum.
    [30] 3GPP, TS 38.473 NG-RAN; F1 Application Protocol (F1AP), Dec. 2021. Rev. 16.8.0.
    [31] 3GPP, TS 38.425 NG-RAN; NR user plane protocol, Apr. 2021. Rev. 16.3.0.
    [32] 3GPP, TS 38.472 NG-RAN; F1 signalling transport, Oct. 2020. Rev. 16.1.0.
    [33] O-RAN Working Group 5, O-RAN Open F1/W1/E1/X2/Xn Interfaces Working Group NR C-plane
    profile. O-RAN Alliance, Mar. 2022. Rev. 06.00.
    [34] 3GPP, TS 38.413 NG-RAN; NG Application Protocol (NGAP), Dec. 2021. Rev. 16.8.0.
    [35] 3GPP, TS 38.423 NG-RAN; Xn Application Protocol (XnAP), Jun. 2022. Rev. 17.1.0.
    [36] 3GPP, TS 38.331 NR; Radio Resource Control (RRC); Protocol specification, Apr. 2022. Rev. 17.0.0.
    [37] 3GPP, TS 29.281 General Packet Radio System (GPRS) Tunnelling Protocol User Plane (GTPv1-U),
    Jun. 2022. Rev. 17.3.0.
    [38] 3GPP, TS 38.323 NR; Packet Data Convergence Protocol (PDCP) specification, Dec. 2021. Rev.
    16.6.0.
    [39] 3GPP, TS 37.324 Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Service Data Adap-
    tation Protocol (SDAP) specification, Apr. 2022. Rev. 17.0.0.
    [40] 3GPP, TS 38.321 NR; Medium Access Control (MAC) protocol specification, Apr. 2022. Rev. 17.0.0.
    [41] O-RAN Software Community, “O-DU High Overview.” https://docs.o-ran-sc.org/
    projects/o-ran-sc-o-du-l2/en/latest/overview.html.
    [42] Small Cell Forum, 5G FAPI: PHY API Specification SCF222.10.04, May 2021.
    [43] Techplayon, “Open Midhaul F1 Interface F1-C and F1-U.” https://www.techplayon.com/
    open-midhaul-f1-interface-f1-u-and-f1-c/.
    [44] SequenceDiagram.org, “Instructions and Examples - SequenceDiagram.org.” https:
    //sequencediagram.org/instructions.html.

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