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研究生： 梁瑞元
Ruei-Yuan Liang
論文名稱： Low-Latency Control Plane Procedure for Next Generation Network
指導教授： 張貴雲
Guey-Yun Chang
口試委員:
學位類別： 碩士
Master
系所名稱： 資訊電機學院 - 資訊工程學系
Department of Computer Science & Information Engineering
論文出版年： 2018
畢業學年度： 106
語文別： 英文
論文頁數： 47
中文關鍵詞： LTE 、5G 、核心網路 、控制訊息
外文關鍵詞： LTE, 5G, Core Network, Control Plane Operation
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    • 本篇論文主要目的在縮短控制端流程的時間，以達到縮短資料服
    務延遲的時間。由於目前LTE 網路中的控制端流程都是循序漸進的
    完成，然而並不是所有的控制訊息對於開始資料服務都是必要的。我
    們透過繞過這些步驟，或是將流程管線化已達到縮短控制端流程的時
    間，以縮短資料服務的延遲。

    This paper aims to reduce the data service latency by reducing the control
    plane procedure. In LTE, the control plane operations run sequentially
    which cause high data service latency. However, not all control operations
    are needed for starting the data service. We bypass or pipeline these steps
    to speed up the control plane procedure. Then the data service can be ready
    sooner.

    Contents i List of Figures iii List of Tables v 1 Introduction 1 1.1 Control Plane Operation in 4G LTE . . . . . . . . . . . . . . . . . . . . 1 2 Related work 3 2.1 Preliminary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 Initial Attachment Procedure in LTE . . . . . . . . . . . . . . . . . . . . 4 2.2.1 UE ID Acquisition . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2.2 Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2.3 NAS Security Setup . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.4 Location Update . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.5 EPS Session Establishment . . . . . . . . . . . . . . . . . . . . . 7 2.2.6 Related Design . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3 Initial Attachment Procedure in 5G . . . . . . . . . . . . . . . . . . . . . 14 2.3.1 Entities in the 5G Core Network . . . . . . . . . . . . . . . . . . 14 2.3.2 Network Slice Architecture . . . . . . . . . . . . . . . . . . . . . 16 2.3.3 Differences of the Attachment Procedure between 4G and 5G . . 16 3 Our Method: LL Design 18 3.1 Main idea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.3 Challenge of Bypassing Location Update . . . . . . . . . . . . . . . . . 19 3.4 NAS Security Setup and EPS Session Establishment . . . . . . . . . . . 20 3.5 Security Concerns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.6 Control Plane Procedure in 5G Core Network . . . . . . . . . . . . . . . 25 4 Implementation and Evaluation 28 4.1 Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.2 Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.2.1 Impact of number of UE . . . . . . . . . . . . . . . . . . . . . . 29 4.2.2 Impact of NAS Security Setup Failure . . . . . . . . . . . . . . . 30 5 Discussion and Conclusion 32 Bibliography 33 Appendix 35

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