URLLC 與 WiFi 網路共存機制之研究

、線上人數：31

、訪客IP：3.144.90.108

姓名	陳學儀(Hsueh-Yi Chen) 查詢紙本館藏	畢業系所	通訊工程學系
論文名稱	URLLC 與 WiFi 網路共存機制之研究 (A study on the coexistence scheme of URLLC and WiFi networks)
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)	由於移動流量需求的增加，在非授權頻譜中部署 NR 是解決 Sub-6 GHz 授權頻譜頻寬不足之一種方法。然而，對於Ultra-reliable and low latency communication (URLLC) 服務的要求，非授權頻譜造成的不可靠之傳輸與無法預期之延遲是無法容忍的。本文專注於非授權頻譜。首先分析 Licensed Assisted Access (LAA) 與 WiFi 共存之問題，並提出一種提升網路效能之解決方案。然而，LAA 採用先聽後送 (Listen-Before-Talk，LBT) 之機制不適合應用於 URLLC，因為裝置於傳輸前可能經歷很長的等待時間。部署 URLLC 於非授權頻譜，利用全向天線之通道預留機制達成持續佔用非授權頻譜中之通道，從而確保隨時有閒置通道可以傳輸資料。然而，此方法有失公平性且於高干擾之環境下，通道預留成功率並不理想。因此，本文針對基於波束成型之多通道預留方法提出一個精準數學模型分析引入波束成型天線技術之通道預留成功機率及對 WiFi 之干擾。結合模擬與分析結果，顯示於高干擾環境下，特定之天線組合能讓通道預留成功率達到100% 並最小化對 WiFi 之影響。此外，基於 frame based equipment (FBE) 機制，3GPP Release-17 提出用戶設備初始化通道佔用時間的方法，以增加非授權頻譜之通道利用率。然而，當 WiFi 流量增加時，URLLC可靠性將迅速降低。因此，本研究提出傳輸/接收切換方法與固定幀週期偏移調整方法以提高 FBE 可靠性。考慮到公平性，提出四種策略以平衡 URLLC 之可靠性與對 WiFi 之影響。模擬結果顯示，於高干擾環境中，與傳統 FBE 方法相比，URLLC 傳輸之可靠性顯著提高20%。
摘要(英)	Due to the steady increase of mobile traffic demand, deploying the 5G New Radio (NR) in unlicensed spectrum is an intuitive approach to solve the bandwidth shortage problem in the Sub-6 GHz licensed spectrum. However, for the requirement of ultra-reliable and low latency communication (URLLC) service, the unreliable transmission and unpredictable delay caused by interference in the unlicensed spectrum are intolerant. This dissertation focuses on unlicensed spectrum. The coexistence problem between the Licensed Assisted Access (LAA) and the WiFi is analyzed firstly and then a solution to promote network performance is proposed. The Listen-Before-Talk (LBT) mechanism adopted by the LAA is not suitable for the URLLC service because the device may suffer a long waiting time before transmission. In literatures, the channel reservation approach with the omnidirectional antenna is a potential solution that continuously occupies channel(s) in the unlicensed spectrum to ensure URLLC transmission at any time. However, this approach is unfair, and in the high interference environment, the success channel reservation probability is unacceptable. Therefore, this dissertation considers the multiple channel reservation approach with beam-based antenna and proposes an analytical model to analyze the performance thoroughly. By introducing the fundamental beamforming antenna technology, the success channel reservation probability is indeed improved and the impact to the WiFi is also reduced. The results show that the success channel reservation probability can reach as high as 100% and the impact on the WiFi can be minimized by a specific antenna combination in high interference environment. In addition, based on the frame based equipment (FBE) scheme, the 3GPP Release-17 proposes a user equipment-initiated channel occupancy time to increase channel utilization in the unlicensed spectrum. However, the increase of WiFi traffic will degrade the URLLC reliability. Therefore, this dissertation proposes a transmit/receive switching scheme and a fixed frame period offset adjustment scheme to promote the FBE reliability. Considering fairness, four strategies are introduced to balance the FBE reliability and the impact on WiFi. The results show that compared with the legacy FBE, the URLLC reliability is significantly improved by 20% in the high interference environment.
關鍵字(中)	★ 指向性天線 ★ 通道預約 ★ 基於框架設備 ★ 異質網路 ★ 新無線電 ★ 非授權頻譜 ★ 高可靠度低延遲通訊	關鍵字(英)	★ Beam-based antenna ★ Channel reservation ★ Frame based equipment ★ Heterogeneous network ★ New radio ★ Unlicensed spectrum ★ URLLC
論文目次	中文摘要 i English Abstract ii Acknowledgments iii List of Tables vi List of Figures vii List of Abbreviations ix Chapter 1 Introduction 1 1.1 Preface 1 1.2 Unlicensed Spectrum 1 1.2.1 Hidden Node Problem 2 1.2.2 Exposed Node Problem 2 1.3 Technical Challenges and Motivation 3 Chapter 2 Related Works 5 2.1 Standard Approach 5 2.2 Enhanced Standard Approach 5 2.3 Hybrid Licensed and Unlicensed Channel Access Approach 6 2.4 Multiple Channel Access Approach 7 2.5 Machine Learning Approach 7 2.6 Channel Reservation Approach 8 2.7 Guideline of Other Feasible Approaches 9 Chapter 3 Listen Before Receive Assisted Give And P-persistent Take Mechanism 10 3.1 The Components of LBR-GAT 10 3.1.1 LBR Procedure 10 3.1.2 Give Process 11 3.1.3 P-persistent Take Process 12 3.2 LBR-GAT 14 3.3 Performance Evaluation 14 Chapter 4 Beam-based Multiple Channel Reservation Approach 16 4.1 Background and Motivation 16 4.1.1 Channel Reservation 16 4.1.2 Beam-based Multi-Channel Reservation (B-M-CR) 18 4.2 System Model 19 4.3 Numerical Analysis 22 4.3.1 Probability of Successful UC Reservation 22 4.3.2 Probability of Failed Data Transmission 25 4.3.3 Latency of UC Reservation 25 4.3.4 Number of UCs 26 4.4 Numerical and Simulation Results 29 Chapter 5 Enhanced Frame Based Equipment Scheme 38 5.1 Background and Motivation 38 5.2 Transmit/Receive Switching (TRS) Scheme 40 5.2.1 Overview 40 5.2.2 Four Policies 41 5.3 Fixed Frame Period Offset Adjustment (FOA) Scheme 44 5.4 Performance Evaluation 49 5.4.1 URLLC Reliability 49 5.4.2 Impacts on WiFi 51 5.5 Discussions 53 Chapter 6 Conclusions 55 Bibliography 57
參考文獻	[1] 3GPP, TR 38.913, Study on scenarios and requirements for next generation access technologies, Jul. 2018. [2] 3GPP, TS 38.824, Study on physical layer enhancements for NR ultra-reliable and low latency case (URLLC) (Release 16), Mar. 2019. [3] 3GPP, TR 38.825, Study on NR industrial internet of things (IoT) (Release 16), Mar. 2019. [4] Huawei and HiSilicon, “New SID on physical layer enhancements for NR URLLC,” 3GPP TSG RAN 81, Online: https://www.3gpp.org/ftp/TSG_RAN/TSG_RAN/TSGR_81/Docs/RP-182089.zip (Accessed 5 August 2021). [5] LTE-U Forum, LTE-U Technical Report, Coexistence study for LTE-U SDL V1.0, Feb. 2015. [6] 3GPP, TR 36.889, Feasibility study on licensed-assisted access to unlicensed spectrum, (Release 13), Jun. 2015. [7] 3GPP, TR 38.889, Study on NR-based access to unlicensed spectrum (Release 15), Dec. 2018. [8] C. Rosa, M. Kuusela, F. Frederiksen and K. I. Pedersen, “Standalone LTE in unlicensed spectrum: radio challenges, solutions, and performance of multefire,” IEEE Communications Magazine, vol. 56, pp. 170-177, Oct. 2018. [9] 3GPP, TS 36.213, Evolved universal terrestrial radio access (E-UTRA); physical layer procedures, Mar. 2018. [10] B. Zheng et al., “Design of multi-carrier LBT for LAA WiFi coexistence in unlicensed spectrum,” IEEE Network, vol. 34, pp. 76-83, Jul. 2019. [11] N. Rupasinghe and İ. Güvenç, “Licensed-assisted access for WiFi-LTE coexistence in the unlicensed spectrum,” 2014 IEEE Globecom Workshops (GC Wkshps), 2014, pp. 894-899. [12] Y. Gao, X. Chu and J. Zhang, “Performance Analysis of LAA and WiFi Coexistence in Unlicensed Spectrum Based on Markov Chain,” 2016 IEEE Global Communications Conference (GLOBECOM), 2016, pp. 1-6. [13] Y. Li, F. Baccelli, J. G. Andrews, T. D. Novlan and J. Zhang, “Modeling and Analyzing the Coexistence of Licensed-Assisted Access LTE and Wi-Fi,” 2015 IEEE Globecom Workshops (GC Wkshps), 2015, pp. 1-6. [14] R. Ali, B. Kim, S. Kim, H. Kim, and F. Ishmanov, “(ReLBT): A reinforcement learning-enabled listen before talk mechanism for LTE-LAA and Wi-Fi coexistence in IoT,” Computer Communications, vol. 150, pp.498-505, Jan. 2020. [15] M. Alhulayil and M. López-Benítez, “Novel LAA waiting and transmission time configuration methods for improved LTE-LAA/Wi-Fi coexistence over unlicensed bands,” IEEE Access, vol. 8, pp. 162373-162393, Sep. 2020. [16] P. Campos, A. Hernández-Solana, and A. Valdovinos-Bardají, “Dealing with the hidden node problem in multi operator LAA-LTE scenarios,” Proceedings of IFIP/IEEE International Conference on Performance Evaluation and Modeling in Wired and Wireless Networks, 2018. [17] C.-Y. Huang et al., “Listen before receive (LBR) assisted network access in LAA and WiFi heterogeneous networks,” IEEE Access, vol. 9, pp. 43845-43861, 2021. [18] R. M. Cuevas, C. Rosa, F. Frederiksen and K. I. Pedersen, “On the impact of listen-before-talk on ultra-reliable low-latency communications,” 2018 IEEE Global Communications Conference (GLOBECOM), Abu Dhabi, United Arab Emirates, 2018, pp. 1-6. [19] ETSI, EN 301 893 v2.1.1, Broadband radio access networks (BRAN); 5 GHz RLAN; Harmonised standard covering the essential requirements of article 3.2 of Directive 2014/53/EU, May 2017. [20] T.-K. Le, U. Salim and F. Kaltenberger, “An overview of physical layer design for ultra-reliable low-latency communications in 3GPP releases 15, 16, and 17,” IEEE Access, vol. 9, pp. 433-444, 2021. [21] Nokia, “Revised WID: core part: enhanced industrial internet of things (IoT) and ultra-reliable and low latency communication (URLLC) support for NR,” 3GPP TSG RAN 88-e, Online: https://www.3gpp.org/ftp/TSG_RAN/TSG_RAN/TSGR_88e/Docs/RP-201310.zip (Accessed 11 March 2021). [22] Z. Zhang, J. Chen, M. Dong, Y. Gao and J. Wang, “Hybrid channel access mechanism based on coexistence scenario of NR-unlicensed,” China Communications, vol. 17, pp. 49-62, Jan. 2020. [23] R. Maldonado, C. Rosa and K. I. Pedersen, “A fully coordinated new radio-unlicensed system for ultra-reliable low-latency applications,” 2020 IEEE Wireless Communications and Networking Conference (WCNC), Seoul, Korea (South), 2020, pp. 1-6. [24] T.-K. Le, U. Salim and F. Kaltenberger, “Channel access enhancements in unlicensed spectrum for NR URLLC transmissions,” 2020 IEEE Global Communications Conference (GLOBECOM), 2020, pp. 1-6. [25] M. Suer, C. Thein, H. Tchouankem and L. Wolf, “Evaluation of multi-connectivity schemes for URLLC traffic over WiFi and LTE,” 2020 IEEE Wireless Communications and Networking Conference (WCNC), 2020, pp. 1-7. [26] N. Wei, X. Lin, Y. Xiong, Z. Chen and Z. Zhang, “Joint listening, probing, and transmission strategies for the frame-based equipment in unlicensed spectrum,” IEEE Transactions on Vehicular Technology, vol. 67, no. 2, pp. 1750-1764, Feb. 2018. [27] G. P. Wijesiri and F. Y. Li, “Frame based equipment medium access in LTE-U: mechanism enhancements and DTMC modeling,” 2017 IEEE Global Communications Conference (GLOBECOM), 2017, pp. 1-6. [28] Z. Wang, H. M. Shawkat, S. Zhao and B. Shen, “An LTE-U coexistence scheme based on cognitive channel switching and adaptive muting strategy,” 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2017, pp. 1-6. [29] T.-K. Le, U. Salim and F. Kaltenberger, “Frame based equipment channel access enhancements in NR unlicensed spectrum for URLLC transmissions,” Computer Science Networking and Internet Architecture, 2020. [30] G. Hampel, C. Li and J. Li, “5G ultra-reliable low-latency communications in factory automation leveraging licensed and unlicensed bands,” IEEE Communications Magazine, vol. 57, no. 5, pp. 117-123, May 2019. [31] A. Zaki-Hindi, S.-E. Elayoubi and T. Chahed, “Multi-tenancy and URLLC on unlicensed spectrum: performance and design,” Computer Networks, vol. 177, Aug. 2020. [32] G. J. Sutton et al., “Enabling ultra-reliable and low-latency communications through unlicensed spectrum,” IEEE Network, vol. 32, no. 2, pp. 70-77, March-April 2018. [33] C. Xu, P. Zeng, H. Yu, X. Jin and C. Xia, “WIA-NR: ultra-reliable low-latency communication for industrial wireless control networks over unlicensed bands,” IEEE Network, vol. 35, no. 1, pp. 258-265, Jan./Feb. 2021. [34] Y. Zeng, Y. Wang, S. Sun and K. Yang, “Feasibility of URLLC in unlicensed spectrum,” 2019 IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS), 2019, pp. 1-5. [35] R. Maldonado, C. Rosa and K. I. Pedersen, “Multi-link techniques for new radio-unlicensed URLLC in hostile environments,” 2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring), 2021, pp. 1-6. [36] B. Khodapanah et al., “Coexistence management for URLLC in campus networks via deep reinforcement learning,” 2020 IEEE Wireless Communications and Networking Conference (WCNC), Seoul, Korea (South), 2020, pp. 1-6. [37] Q. Huang, X. Xie and M. Cheriet, “Reinforcement learning-based hybrid spectrum resource allocation scheme for the high load of URLLC services,” EURASIP Journal on Wireless Communications and Networking 2020, 250 (2020). [38] H.-Y. Chen, P.-F. Lee, T.-W. Chiang and S.-T. Sheu, “The design of channel reservation mechanism for URLLC in unlicensed spectrum,” Proc. Nat. Symp. on Telecommun. (NST), Taiwan, Jan. 2020, pp. 1-3. [39] H.-Y. Chen, P.-F. Lee, T.-W. Chiang, S.-S. Wang and S.-T. Sheu, “HMC: a hopping-based multi-channel coordination scheme for URLLC in unlicensed spectrum,” 2020 IEEE Wireless Communications and Networking Conference (WCNC), Seoul, Korea (South), 2020, pp. 1-6. [40] C.-C. Chang, S.-S. Wang and S.-T. Sheu, “On beam-based channel reservation for URLLC in unlicensed spectrum,” 2020 IEEE 92st Vehicular Technology Conference (VTC2020-Fall), Victoria, BC, Canada, 2020, pp. 1-5. [41] R. M. Cuevas, C. Rosa, F. Frederiksen and K. I. Pedersen, “Uplink ultra-reliable low latency communications assessment in unlicensed spectrum,” 2018 IEEE Globecom Workshops (GC Wkshps), Abu Dhabi, United Arab Emirates, 2018, pp. 1-6. [42] R. Bajracharya, R.Shrestha and H. Jung, “Future is unlicensed: private 5G unlicensed network for connecting industries of future,” Sensors 2020, pp. 1-18, May 2020. [43] R. Maldonado, C. Rosa and K. I. Pedersen, “Analysis of high-reliable and low-latency communication enablers for new radio unlicensed,” 2020 IEEE Wireless Communications and Networking Conference (WCNC), Seoul, Korea (South), 2020, pp. 1-6. [44] P. Wang and W. Zhuang, “An improved busy-tone solution for collision avoidance in wireless ad hoc networks,” 2006 IEEE International Conference on Communications (ICC), Istanbul, 2006, pp. 3802-3807. [45] D. Bharadia, E. McMilin and S. Katti, “Full duplex radios,” Proc. ACM Special Interest Group on Data Communication (SIGCOMM), 2013, pp. 375-386. [46] M. Jain et al., “Practical, real-time, full duplex wireless,” Proc. ACM Annual International Conference on Mobile Computing and Networking (MobiCom), Sep. 2011, pp. 301-312. [47] J. Y. Kim, O. Mashayekhi, H. Qu, M. Kazadiieva and P. Levis, “Janus: a novel MAC protocol for full duplex radio”, Proc. CSTR, pp. 1-12, 2013. [48] R. L. Frank and S. A. Zadoff, “Phase shift pulse codes with good periodic correlation properties,” IRE Trans. Inf. Theory, pp. 381-382, Oct. 1962. [49] D. C. Chu, “Polyphase codes with good periodic correlation properties,” IEEE Trans. Inf. Theory, pp. 531-532, Jul. 1972. [50] S. Lage and L. Giupponi, “Listen before receive for coexistence in unlicensed mmwave bands,” 2018 IEEE Wireless Communications and Networking Conference (WCNC), Barcelona, Spain, 2018, pp. 1-6. [51] IEEE Std 802.11-2016 (Revision of IEEE Std 802.11-2012), IEEE Standard for Information technology—telecommunications and information exchange between systems local and metropolitan area networks—specific requirements - part 11: wireless LAN medium access control (MAC) and physical layer (PHY) specifications, pp. 1-3534, Dec. 2016. [52] H. Lee, Y. Kim, S. Hahm and C. Kim, “Virtualized protection of IEEE 802.11 family coexistence,” 2009 9th International Symposium on Communications and Information Technology, 2009, pp. 562-563. [53] B. A. H. S. Abeysekera, M. Matsui, Y. Asai and M. Mizoguchi, “Network controlled frequency channel and bandwidth allocation scheme for IEEE 802.11a/n/ac wireless LANs: RATOP,” 2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC), 2014, pp. 1041-1045. [54] J. Jeon, H. Niu, Q. C. Li, A. Papathanassiou and G. Wu, “LTE in the unlicensed spectrum: evaluating coexistence mechanisms,” Proceedings of IEEE Globecom Workshops, Dec. 2014, pp. 740–745. [55] H. Wang, Z. Zhang, Y. Li and M. F. Iskander, “A switched beam antenna with shaped radiation pattern and interleaving array architecture,” IEEE Transactions on Antennas and Propagation, vol. 63, no. 7, pp. 2914-2921, Jul. 2015. [56] K. Uehara, T. Seki and K. Kagoshima, “A planar sector antenna for indoor high-speed wireless communication terminals,” IEEE Antennas and Propagation Society International Symposium 1997, 1997, pp. 1352-1355. [57] I. Lee and D. Im, “Low-power SOI CMOS antenna switch driver circuit with RF leakage suppression and fast switching time,” Electronics Letters, vol. 53, no. 5, pp. 293-294, Mar. 2017. [58] C.-C. Chang, “Beam-based channel reservation mechanism for URLLC over unlicensed spectrum,” M.S. thesis, Dept. Commun. Eng., NCU, Taoyuan, Taiwan, 2020. [59] R. Abreu, G. Berardinelli, T. Jacobsen, K. Pedersen and P. Mogensen, “A blind retransmission scheme for ultra-reliable and low latency communications,” 2018 IEEE 87th Vehicular Technology Conference (VTC2018-Spring), Porto, 2018, pp. 1-5. [60] J. Um, S. Park and Y. Km, “Analysis of channel access mechanism on 5 GHz unlicensed band,” 2015 International Conference on Information and Communication Technology Convergence (ICTC), 2015, pp. 898-902. [61] IETF RFC 2001, TCP slow start, congestion avoidance, fast retransmit, and fast recovery algorithms, 1997.
指導教授	許獻聰黃琴雅	審核日期	2021-8-27
推文	facebook plurk twitter funp google live udn HD myshare reddit netvibes friend youpush delicious baidu
網路書籤	Google bookmarks del.icio.us hemidemi myshare

博碩士論文 105583001 詳細資訊