為5G 提出的動態調配RAO 資源方法

以作者查詢圖書館館藏

、以作者查詢臺灣博碩士

、以作者查詢全國書目

、勘誤回報

、線上人數：10

、訪客IP：18.190.239.122

姓名

王仁廷(Ren-Ting Wang) 查詢紙本館藏

畢業系所

資訊工程學系

論文名稱

為5G 提出的動態調配RAO 資源方法
(Dynamic RAO Allocation for 5G Network)

相關論文

★ 基於OP-TEE的可信應用程式軟體生態系統	★ 在低軌道衛星無線通訊中的CSI預測方法
★ 為多流量低軌道衛星系統提出的動態換手策略	★ 基於Trustzone的智慧型設備語音隱私保護系統
★ 一種減輕LEO衛星網路干擾的方案	★ TruzGPS:基於TrustZone的位置隱私權保護系統
★ 衛星地面整合網路之隨機接入前導訊號設計與偵測	★ SatPolicy: 基於Trustzone的衛星政策執行系統
★ TruzMalloc: 基於TrustZone 的隱私資料保護系統	★ 衛星地面網路中基於物理層安全的CSI保護方法
★ 低軌道衛星地面整合網路之安全非正交多重存取傳輸	★ 低軌道衛星地面網路中的DRX機制設計
★ 衛星地面整合網路之基於集合系統的前導訊號設計	★ 基於省電的低軌衛星網路路由演算法
★ 衛星上可重組化計算之安全FPGA動態部分可重組架構	★ 衛星網路之基於空間多樣性的前導訊號設計

檔案

[Endnote RIS 格式]

[Bibtex 格式]

[相關文章]

[文章引用]

[完整記錄]

[館藏目錄]

[檢視]

[下載]

本電子論文使用權限為同意立即開放。
已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。

摘要(中)

隨著5G的到來，基地台需要確保三種使用場景不同的需求，這三種場景分別為增強型行動寬頻通訊 (Enhanced Mobile Broadband, eMBB)，大規模機器型通訊 (Massive Machine Type Communications, mMTC) 和超可靠度和低延遲通訊 (Ultra-Reliable and Low Latency Communications, URLLC)。在5G中，UE分配到專屬資源傳送資料前須先完成隨機接入(Random Access, RA)，若隨機接入失敗則會造成延遲上升。隨機接入包含前導碼傳送(Preamble Transmission)、隨機接入響應(Random Access Response)、訊息三(Message 3)和解決競爭訊息(Contention Resolution)等四條訊息。當有多個UE在前導碼傳送時選擇相同的前導碼(Preamble)，這些UE會被分配到相同的時頻空間傳送訊息三，由於這些在相同時頻空間傳送的訊息未經過處理，使得這些訊息發生碰撞，造成基地台無法解出這些UE的資料，導致這些UE這次的隨機接入失敗且必須從前導碼傳送開始重做隨機接入，這類問題叫做前導碼碰撞(Preamble Collision)。在5G中，一個基地台要服務更多的UE，參與隨機接入的UE數量越多，發生前導碼碰撞的機率會急遽的上升造成延遲上升，使得5G的要求無法被滿足。為了解決這個問題，5G透過擴增隨機接入資源的方式減低碰撞發生，然而隨機接入保留越多的資源將導致使用者資料 (User-plane data) 的頻寬越少。為此，本篇提出一個動態調配隨機接入資源的方法，一方面透過擴增隨機接入資源的方式減低碰撞發生機率減少延遲，另一方面盡可能少占用頻寬保留資源給使用者資料傳輸。

摘要(英)

In 5G networks, the cell needs to ensure the requirement of three deployment scenarios which are Enhanced Mobile Broadband (eMBB), Massive Machine Type Communication (mMTC) and Ultra-Reliable and Low Latency Communication (URLLC). Before UE is allowed to transmit User-plane data, UE needs to perform Random Access (RA) to get its own dedicate resource. The procedure of RA contains four messages which are preamble transmission, random access response, message 3 and contention resolution. When more than one UEs select the same preamble in preamble transmission, it will lead to a $preamble collision$ problem which causes RA failed. The preamble collided UEs will be assigned with the same resource to transmit message 3 and this result in the cell cannot decode their data.
With more User Equipments (UE) in a cell, satisfying low latency of RA is much more challenging since the probability of $preamble collision$ during RA will be higher. As a result, the latency will significantly increased when there are too many of UEs join RA procedure together. To reduce the preamble collision rate, 5G comes with RA resource expanding technique. However, with more resources allocated to RA, there will be less resources for U-plane (User-plane) data transmission. As a result, in this paper, we proposed a dynamic RA resource allocation scheme for 5G network. Our proposed method not only reduces the preamble collision rate when RA loading is high, but also reserves the resource for U-plane transmission as much as possible.

關鍵字(中)

★ 5G
★ 隨機接入

關鍵字(英)

★ 5G
★ Random Access

論文目次

中文摘要 i
Abstract ii
Contents iii
List of Figures v
List of Tables vii
1 Introduction 1
2 Related Work 4
2.1 Non RA Resource Expanding 4
2.2 RA Resource Expanding 5
2.3 Preamble Collision Analysis 6
3 System Model 7
4 Methodology 9
4.1 RA Attempt Period 9
4.2 Channel Capacity 11
4.2.1 Throughput Analysis 11
4.2.2 Determine Channel Capacity 15
4.3 Proposed Method 15
5 Simulation 21
5.1 System Environment 21
5.2 Different case of prach-ConfigurationIndex 22
5.3 Different configuration of τ threshold 36
6 Conclusion and Future Work 42
6.1 Conclusion 42
6.2 Future Work 42
7 Discussion 44
7.1 RAO and SSB mapping mechanism 44
Bibliography 47

參考文獻

[1] “Final Report of 3GPP TSG RAN WG1 #89 v1.0.0,” 3GPP, Tech. Rep., Aug. 2017, R1-1712031.
[2] “Final Report of 3GPP TSG RAN WG1 #AH_NR2 v1.0.0,” 3GPP, Tech. Rep., Aug. 2017, R1-1712032.
[3] “Remaining issues on RACH procedure,” NTT DOCOMO, INC., Tech. Rep., Jan. 2018, R1-1800654.
[4] Study on RAN Improvements for Machine-Type Communications, 3GPP, Aug. 2011, TR 37.868 V0.8.1.
[5] 5G; Study on New Radio (NR) access technology, 3GPP, Sep. 2018, TR 38.912
V15.0.0.
[6] NR; Medium Access Control(MAC) protocol specification, 3GPP, Sep. 2018, TS 38.321 V15.3.0.
[7] NR; Physical channels and modulation, 3GPP, Oct. 2018, TS 38.211 V15.3.0.
[8] NR; Physical layer procedures for control, 3GPP, Oct. 2018, TS 38.213 V15.3.0.
[9] NR; Radio Resource Control(RRC); Protocol specification, 3GPP, Oct. 2018, TS 38.331 V15.3.0.
[10] Study on scenarios and requirements for next generation access technologies, 3GPP, Sep. 2018, TR 38.913 V15.0.0.
[11] 5G; NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone, 3GPP, Apr. 2019, TS 38.101-1 V15.4.0.
[12] 5G; NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone, 3GPP, Apr. 2019, TS 38.101-2 V15.4.0.
[13] Y.-J. Chen, L.-Y. Cheng, and L.-C. Wang, Prioritized Resource Reservation for Reducing Random Access Delay in 5G URLLC,” IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, Oct. 2017.
[14] S. Duan, V. Shah-Mansouri, and V. W. S. Wong, “Dynamic Access Class Barring for M2M Communication in LTE Networks,” Globecom, pp. 4747–4752, Dec. 2013.
[15] Minimum requirements related to technical performance for IMT-2020 radio interface(s), International Telecommunication Union Radiocommunication Sector, Nov. 2017, ITU-R M.2410-0.
[16] M. Koseoglu, “Lower Bounds on the LTE-A Average Random Access Delay Under Massive M2M Arrivals,” IEEE Transaction on Communications, no. 5, pp. 2104–2115, May. 2016.
[17] Y. Liang, X. Li, J. Zhang, and Z. Ding, “Non-Orthogonal Random Access for 5G Networks,” IEEE Transaction on Wireless Communications, no. 7, pp. 4817–4831, Jul. 2017.
[18] T.-M. Lin, C. han Lee, J.-P. Cheng, and W.-T. Chen, “PRADA: Prioritized Random Access With Dynamic Access Barring for MTC in 3GPP LTE-A Networks,” IEEE Transaction on Vehicular Technology, no. 5, pp. 2467–2472, Jun. 2014.
[19] N. K. Pratas, H. Thomsen, Čedomir Stefanović, and P. Popovski, “Code-Expanded Random Access for Machine-Type Communications,” IEEE Globecom Workshops, pp. 1681–1686, Dec. 2012.
[20] Y. Saito, Y. Kishiyama, A. Benjebbour, T. Nakamura, A. Li, and K. Higuchi, “Non-Orthogonal Multiple Access(NOMA) for Cellular Future Radio Access,” IEEE Vehicular Technology Conference, Jun. 2013.
[21] S. Vural, N. Wang, P. Bucknell, G. Foster, R. Tafazolli, and J. Muller, “Dynamic Preamble Subset Allocation for RAN Slicing in 5G Networks,” IEEE Access, pp.13 015–13 032, Mar. 2018.
[22] Z. Wang and V. W.S.Wong, “Optimal Access Class Barring for Stationary Machine Type Communication Devices With Timing Advance Information,” IEEE Transactions
on Wireless Communications, no. 10, pp. 5374–5387, Oct. 2015.
[23] D. T. Wiriaatmadja and K. W. Choi, “Hybrid Random Access and Data Transmission Protocol for Machine-to-Machine Communications in Cellular Networks,” IEEE Transactions on Wireless Communications, no. 1, pp. 33–46, Jan. 2015.
49

指導教授

張貴雲(Guey-Yun Chang)

審核日期

2019-7-24

推文