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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/59913完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 謝宏昀 | |
| dc.contributor.author | Chih-Kai Chen | en |
| dc.contributor.author | 陳稚鎧 | zh_TW |
| dc.date.accessioned | 2021-06-16T09:44:43Z | - |
| dc.date.available | 2020-02-16 | |
| dc.date.copyright | 2017-02-16 | |
| dc.date.issued | 2017 | |
| dc.date.submitted | 2017-01-25 | |
| dc.identifier.citation | [1] Nokia, “Nokia lte for unlicensed spectrum,” White Paper, 2014.
[2] Qualcomm, “Lte in unlicensed spectrum: Harmonious coexistence with wifi,” White Paper, June 2014. [3] 3GPP RWS-140018, “Lte in unlicensed spectrum,” Jun. 2014. [4] EN 301.893 v.1.8.0, Jan 2015, 5 GHz high performance RLAN. [5] R. Yin, G. Yu, A. Maaref, and G. Y. Li, “Adaptive lbt for licensed assisted access lte networks,” in 2015 IEEE Global Communications Conference (GLOBECOM), Dec 2015, pp. 1–6. [6] ——, “A framework for co-channel interference and collision probability tradeo↵ in lte licensed-assisted access networks,” IEEE Transactions on Wireless Communications, vol. 15, no. 9, pp. 6078–6090, Sept 2016. [7] C. Chen, R. Ratasuk, and A. Ghosh, “Downlink performance analysis of lte and wifi coexistence in unlicensed bands with a simple listen-before-talk scheme,” in 2015 IEEE 81st Vehicular Technology Conference (VTC Spring), May 2015, pp. 1–5. [8] Q. Zhang, Q. Wang, Z. Feng, and T. Yang, “Design and performance analysis of a fairness-based license-assisted access and resource scheduling scheme,” IEEE Journal on Selected Areas in Communications, vol. 34, no. 11, pp. 2968–2980, Nov 2016. [9] Y. Song, K. W. Sung, and Y. Han, “Coexistence of wi-fi and cellular with listen-before-talk in unlicensed spectrum,” IEEE Communications Letters, vol. 20, no. 1, pp. 161–164, Jan 2016. [10] Z. ning Kong, D. H. K. Tsang, B. Bensaou, and D. Gao, “Performance analysis of ieee 802.11e contention-based channel access,” IEEE Journal on Selected Areas in Communications, vol. 22, no. 10, pp. 2095–2106, Dec 2004. [11] G. Bianchi, “Ieee 802.11-saturation throughput analysis,” IEEE Communications Letters, vol. 2, no. 12, pp. 318–320, Dec 1998. [12] ——, “Performance analysis of the ieee 802.11 distributed coordination function,” IEEE Journal on Selected Areas in Communications, vol. 18, no. 3, pp. 535–547, March 2000. [13] S.-T. Sheu and T.-F. Sheu, “A bandwidth allocation/sharing/extension protocol for multimedia over ieee 802.11 ad hoc wireless lans,” IEEE Journal on Selected Areas in Communications, vol. 19, no. 10, pp. 2065–2080, Oct 2001. [14] Technical Specification Group Radio Access Network; Study on LicensedAssisted Access to Unlicensed Spectrum, 3rd Generation Partnership Project, Jun 2015, release 13. [15] 3GPP R1-155022, “Final report of 3gpp tsg ran wg1 82 v1.0.0,” August 2015. [16] ——, “Final report of 3gpp tsg ran wg1 83 v1.0.0,” November 2015. [17] H. Huawei, DL LBT Priority Classes, 3GPP, November 2015, r2-1562178. [18] 3GPP R1-154074, “On laa rrm measurement and carrier selection,” August 2015. [19] J.-H. Liou, “Analyzing and Optimizing LTE Performance in Unlicensed Spectrum,” Master’s thesis, NTU, Taiwan, 2016. [20] 3GPP R1-153843, “Downlink channel access for laa,” August 2015. [21] 3GPP R1-160236, “Final report of 3gpp tsg ran wg1 83 v1.0.0,” February 2016. [22] W. Yin and J. Wang, “Small cell deployment in licensed/unlicensed band: A local interaction game framework,” in Wireless Communications Signal Processing (WCSP), 2015 International Conference on, Oct 2015, pp. 1–5. [23] Y. Xu, J. Wang, Q. Wu, A. Anpalagan, and Y. D. Yao, “Opportunistic spectrum access in cognitive radio networks: Global optimization using local interaction games,” IEEE Journal of Selected Topics in Signal Processing, vol. 6, no. 2, pp. 180–194, April 2012. [24] Jason Robert Marden, “Learning in largescale games and cooperative control,” 2007. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/59913 | - |
| dc.description.abstract | 在現今的生活中LTE是一項非常受歡迎的技術。但由於頻寬上的限制，我們需要更多可用的頻寬來進行傳輸。因此將LTE拓展到未授權頻帶已經在近幾年被廣泛地討論。根據第三代行動通訊組織(3GPP)會議討論結果，類別四的先聽後送機制將會是LTE在未授權頻帶上操作的關鍵技術。現今相關的文獻中有非常多系統模擬的研究，但在數學分析上顯得有些稀少。在這篇論文中我們將會深入探討如何使用分析模型來評估授權輔助(LAA)的效能。馬可夫分析模型已經被廣泛地應用在評估WiFi效能。因此我們會使用馬可夫分析模型來幫助我們建立一套系統來對LAA進行效能分析。更進一步地，我們會提出一個根據現行先聽後送機制的馬可夫分析模型，最關鍵的差別初始空間通道評估(Initial Clear Channel Assessment)考慮與否,除此之外它將可以支援分析在LAA下不同的優先類別分析。根據此篇論文分析結果，在沒有考慮ＩＣＣＡ的模型下跟我們所提出的模型比較，會發現在資料流量較低的情境下會有非常明顯的差異。但隨著資料流量的提升，兩者差距將會變小。如果使用緩衝區滿載流量模型(Full Buffer Traffic Model)兩者的差異將會非常的小。除此之外，我們還發現在有應用ICCA的情況下,WiFi的效能可以表現得更好。最後我們呈現，一個裝置支援不同的優先類別可以有效地避免碰撞發生。 | zh_TW |
| dc.description.abstract | LTE is a popular radio access technology (RAT) all around the world, but it
is restricted by the spectrum resource. Therefore, it needs to find more available spectrum to transmit data. Hence, LTE in unlicensed band has been discussed in recent years. According to 3GPP, Category 4 Listen-Before-Talk mechanism has been decided. There are lots of works which only focus on system simulation, but less of them concern about analytical model. In this thesis, we probe into the measure of how to build an analytical model to evaluate the performance of LAA . Markov model has been used widely to evaluate the performance of WiFi system. Hence, we make use of Markov model to help us to evaluate the performance of LAA. In addition, the proposed LAA Markov model can support to evaluate di↵erent priority classes. Based on the evaluation result of this thesis, in the low trac, the di↵erence of performance between proposed LAA model and Cisco proposed model is large. However, as the increasing load of the trac, the di↵erence of performance between them is getting closer. Moreover, we observe that Cat. 4 LBT mechanism can achieve better coexistence than Cisco proposed mechanism since Cat. 4 LBT has an additional duration which is called Initial Clear Channel Assessment (ICCA). The final evaluation result shows a single station with mutiple prioirty classes can avoid collisions e↵ectively since higher priority always wins out in the competition with lower priroirty class within a single station. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T09:44:43Z (GMT). No. of bitstreams: 1 ntu-106-R02942097-1.pdf: 7441997 bytes, checksum: ba0742d48196d42a0b234fb356cd4aea (MD5) Previous issue date: 2017 | en |
| dc.description.tableofcontents | ABSTRACT .................................. ii
LIST OF TABLES .............................. v LIST OF FIGURES ............................. vi CHAPTER 1 INTRODUCTION .................... 1 CHAPTER 2 BACKGROUND AND RELATED WORK ..... 4 2.1 Background .............................. 4 2.1.1 Enhanced Distributed Channel Access ............ 4 2.1.2 802.11e Analytical Model ................... 6 2.1.3 LBT mechanism ........................ 14 2.1.4 LAA priority and contention mechanism ........... 16 2.1.5 LAA carrier selection of 3GPP ................ 19 2.2 Related Work ............................. 21 CHAPTER 3 LBT PRIORITY CLASS AND ANALYTICAL MODEL 27 3.1 Discrete Time Markov Chain Model ................. 27 3.2 Transition Probabilities ........................ 31 3.3 System Equations ........................... 34 3.4 Throughput Analysis ......................... 38 3.5 Comparison of other Model ...................... 39 CHAPTER 4 EVALUATION RESULTS AND DISCUSSIONS . 42 4.1 Comparison with di↵erent models .................. 43 4.2 Comparison of LAA and wLAA coexist with WiFi. ......... 48 4.3 Priority class comparison ....................... 55 CHAPTER 5 GLOBAL OPTIMIZATION USING LOCAL INTERACTION GAME FRAMEWORK ............... 60 5.1 System Model ............................. 60 5.2 Problem Formulation ......................... 62 5.3 Local Interaction Game ........................ 64 5.4 Proposed Algorithm .......................... 65 5.5 Simulation Results and Disscusion .................. 66 CHAPTER 6 CONCLUSION AND FUTURE WORK ...... 71 REFERENCES ................................. 72 | |
| dc.language.iso | en | |
| dc.subject | 授權輔助接取技術 | zh_TW |
| dc.subject | LBT | en |
| dc.subject | LAA | en |
| dc.subject | Evaluation | en |
| dc.title | LTE授權輔助接取技術之模型研究與效能分析 | zh_TW |
| dc.title | Further Analysis and Evaluation of the Listen-Before-Talk Mechanism for License-Assisted Access with Priority Classes | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 105-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 蘇炫榮,周俊廷,李佳翰 | |
| dc.subject.keyword | 授權輔助接取技術, | zh_TW |
| dc.subject.keyword | LAA,LBT,Evaluation, | en |
| dc.relation.page | 73 | |
| dc.identifier.doi | 10.6342/NTU201700259 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2017-01-25 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
| 顯示於系所單位： | 電信工程學研究所 | |
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