成功大學博碩士論文系統

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研究生：	謝忠穎 Hsieh, Chung-Ying
論文名稱：	在蜂巢式物聯網中藉由提前釋放RRC連線以強化節電之方法 Improving Power Saving through Early Release of RRC Connection for Cellular Internet of Things
指導教授：	蔡孟勳 Tsai, Meng-Hsun
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 資訊工程學系 Department of Computer Science and Information Engineering
論文出版年：	2019
畢業學年度：	107
語文別：	英文
論文頁數：	50
中文關鍵詞：	無線資源控制、蜂巢式物聯網控制平面優化、節能技術
外文關鍵詞：	Radio Resource Control (RRC), CP CIoT EPS Optimization, power saving
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為了因應大量物聯網的需求，第三代合作夥伴計劃 (3GPP) 提出了蜂巢式物聯網的技術 (CIoT)。由於物聯網中的裝置大部分都是由電池供電，所以省電技術是一個相當重要的議題。3GPP提出了改進非連續接收模式 (eDRX)、兩個傳輸優化機制來幫助裝置省電。

在這篇論文中，我們基於蜂巢式物聯網控制平面優化(CP CIoT EPS Optimization)提出了藉由提前釋放RRC連線以強化節電的方法(ER-RRC)。透過訊息流程的修改，物聯網裝置可你更早進入無線資源空閒狀態(RRC\_IDLE)，以及計數機制的幫助來減少不必要的傳呼流程。實驗結果顯示，ER-RRC顯著比標準CP CIoT EPS Optimization更加省電，且只需付出些微增加的封包延遲。

In order to meet the massive demands of IoT, the Third Generation Partnership Project (3GPP) proposed new cellular IoT (CIoT) technologies.How to reduce the power consumption is always a critical issue because a majority of IoT devices are battery-powered.3GPP proposed eDRX and two transport optimization mechanisms to help devices reduce power consumption.In this thesis, based on the CP CIoT EPS Optimization, a Early Release of RRC (ER-RRC) scheme is proposed with two major features, entering RRC\_IDLE early and reducing unnecessary paging processes.The message flow is modified to make IoT devices enter RRC\_IDLE early.A counter-based mechanism is used to reduce unnecessary paging procedure.The results show that ER-RRC outperforms standard CP CIoT EPS Optimization by gaining significant power saving with little downlink latency.

中文摘要. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Related Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Data Transport in CP CIoT EPS Optimization . . . . . . . . . . . . . . . . 6
ER-RRC Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1 MO Data Transport with ER-RRC . . . . . . . . . . . . . . . . . . . . 11
2 ER-RRC with Counter-Based Mechanism . . . . . . . . . . . . . . . . . 13
Analytical Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1 Analytical Model for CP CIoT without RAI . . . . . . . . . . . . . . . 17
1.1 The Output Measures for CP CIoT without RAI . . . . . . . . 19
1.2 Stationary Probabilities for CP CIoT without RAI . . . . . . . 21
1.3 State Holding Time for CP CIoT without RAI . . . . . . . . . . 22
2 Analytical Model for CP CIoT . . . . . . . . . . . . . . . . . . . . . . . 24
2.1 Stationary Probabilities for CP CIoT . . . . . . . . . . . . . . . 25
2.2 State Holding Time for CP CIoT . . . . . . . . . . . . . . . . . 26
3 Analytical Model for ER-RRC . . . . . . . . . . . . . . . . . . . . . . . 29
iv
3.1 Stationary Probabilities . . . . . . . . . . . . . . . . . . . . . . 30
3.2 State Holding Time . . . . . . . . . . . . . . . . . . . . . . . . . 34
4 Validation of Output Measures . . . . . . . . . . . . . . . . . . . . . . 34
Performance Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
1 Estimation of ER-RRC Parameters . . . . . . . . . . . . . . . . . . . . 36
2 Performance Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
                                    

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[6] 3GPP TS 23.401 V13.13.0. General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access, 2017.
[7] 3GPP RP-151393. NB LTE { Battery lifetime evaluation, 2015.
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[11] Pilar Andres-Maldonado, Pablo Ameigeiras, Jonathan Prados-Garzon, Jorge Navarro-Ortiz, and Juan M Lopez-Soler. Narrowband IoT data transmission procedures for massive machine-type communications. IEEE Network, 31(6):8-15, 2017.
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[15] 3GPP TS 24.301 V13.12.0. Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS), 2018.
[16] 3GPP TS 36.304 V13.8.0. Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedures in idle mode, 2017.
[17] 3GPP TR 25.912 V15.0.0. Feasibility study for evolved Universal Terrestrial Radio Access (UTRA) and Universal Terrestrial Radio Access Network (UTRAN), 2018.
[18] Siddharth Mohan, Rohit Kapoor, and Bibhu Mohanty. Latency in HSPA Data Networks. Qualcomm, Tech. Rep., 2011.

校內：2024-01-01公開
校外：2024-01-01公開

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