博碩士論文 955303018 詳細資訊




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姓名 鄭豐毅(Feng-yi Cheng)  查詢紙本館藏   畢業系所 通訊工程學系在職專班
論文名稱 WiMAX基地台信號覆蓋實地量測與分析
(Coverage Measurements and Analysis of WiMAX Basestation Signal in Real Field)
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摘要(中) 為解決日益增加的行動數據的需求,電信運營商均以新增基站(BaseStation)或採優化自家無線網路的方式解決,最後付出一筆費用後,結果卻不如預期中的理想。為改善室內涵蓋與提昇自家無線網路的服務品質,陸續端出新設備,ex: Repeater、Small Cell、 Femtocell、WiFi等解決方案,來滿足廣大客戶的需求。如何瞭解既有無線網路的佈建缺失及未來引進新設備的規劃使用,與對既有無線網路的影響程度,將會是下階段電信業者所要多考慮的。為瞭解目前無線網路覆蓋的狀態,除了從模擬(Simulation)程式中得到的訊號涵蓋結果外,另一個方式就是路測(Drive test),此方式採KPI的方式進行研判,但對於因環境改變所引起的訊號變化,卻沒有太多的說明。
本研究將在WiMAX基站(Basestation)的有效涵蓋區域與差異化之環境下,執行實地量測RSSI(Received Signal Strength Indicator;接收信號強度指示)、FTP Down Link throughput(FTP下載流量)的可靠性能測試,並計算出量測區的Path Loss(路徑損耗)即可對於無線訊號之強度因環境差異化所造成的變化,進行資料分析。藉此,經由現場實地量測所得到的經驗與結果,對往後電信業者於佈建基站(BaseStation)的環境選擇與天線方向的擺放與角度的設計,有進一步的參考貢獻。
關鍵字:WiMAX,RSSI,Simulation,Basestation,基站位置,覆蓋率,Path Loss,天線方向
摘要(英) To address the increasing demand of mobile data, mobile operators often add Basestations or adopt its own wireless network optimization solution. But they usually find that the result is not as good as expected ideals after paying big expenses. To improve indoor coverage and enhance the service quality of its own wireless network to meet the needs of users, the mobile operators bring in new equipments one after another, for example, Repeater, Small Cell, Femtocell, WiFi and other solutions. Comprehensive understanding the deficiencies of existing wireless network provisioning, introducing new equipments to implement the plans, and evaluating the impact on the existing level of wireless networks will be the subjects that mobile operators have to consider more deliberately in the next phase. There are some methods to understand the current state of wireless network coverage, for example, signal cover results obtained from Simulation program and road test, adopted by KPI judged. However, the variations of signal caused by environmental changes are left behind illustrations.
This study, under the effective coverage area and differential environment of WiMAX Basestation, implemented on-site measurements RSSI (Received Signal Strength Indicator; received signal strength indication) and FTP Down Link throughput (FTP download traffic) to test the reliability and calculate the Path Loss of measurement area, and then analyzing the strength of the wireless signal differences caused by environmental changes. Thus, the test results of these on-site field surveys would be a benefit for operator in environmental selecting of BaseStation provision, choosing placement of antenna orientation, and angle design, with further reference contributions.
Keywords: WiMAX, RSSI, Simulation, Basestation location, Coverage, Path Loss, Antenna
關鍵字(中) ★ 覆蓋率
★ 基站位置
★ 天線方向
關鍵字(英) ★ WiMAX
★ RSSI
★ Simulation
★ Path Loss
論文目次 摘 要 i
Abstract ii
誌 謝 iii
目 錄 iv
圖 目 錄 List of Figures v
表 目 錄 List of Tables vii
第一章 緒 論 1
1-1 前言 1
1-2 研究動機 2
1-3 WiMAX的背景知識 3
1-4 論文架構 11
第二章 通訊信號量測相關理論與知識 12
2-1電磁波的傳播概述 12
2.1.1 無線通道傳輸模型 12
2.1.2 反射(Reflection) 13
2.1.3 繞射(Diffraction) 15
2-2傳播與通道模型 16
2.2.1傳播路徑損耗模型 16
第三章 WiMAX信號量測方法 27
3-1量測設備與環境介紹 27
3-2量測地區 32
3-3量測方法說明 33
3.3.1 物理效能(Physical Performance) 34
3.3.2流量效能量測(Throughput Performance Measurement) 40
第四章 基地台信號覆蓋之實地量測結果與分析 41
4-1路徑損失模擬模型 41
4-2行人移動量測 44
4.2.1 移動量測-量測區域一 44
4.2.2 移動量測-量測區域二 46
4-3 不同基地台不同建築物室外與室內移動之路徑損失量測 51
4.3.1量測點A 51
4.3.2量測點B 52
4.3.3量測點C 53
4.3.4量測點D 53
4.3.5量測點E 54
4.3.6量測點F 55
4.3.7量測點G 56
4.3.8量測點H 56
4-4 室內與室外之FTP流量的量測 57
第五章 結論與未來研究 62
參 考 文 獻 63
參考文獻 [1] WiMAX Forum, “WiMAX System Evaluation Methodology” December 2007.
[2] IEEE Std 802.16e-2005,“Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems, Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands
” February 2006.
[3] C. Eklund et al., “IEEE Standard 802.16: A Technical Overview of the
WirelessMAN™ Air Interface for Broadband Wireless Access,” IEEE Commun.
Mag., June 2002, pp. 98–107.
[4] Marcus C. Walden, Plextek Ltd., London Road, Great Chesterford, Essex, CB10 1NY, United Kingdom. Frank J. Rowsell, LCC UK, Capital Park, Fulbourn, Cambridge, CB1 5XE, United Kingdom. “Urban Propagation Measurements and Statistical Path Loss Model at 3.5 GHz.”
[5] Greg Durgin, Student Member, IEEE, Theodore S. Rappaport, Fellow, IEEE, and Hao Xu, Student Member, IEEE “Measurements and Models for Radio Path Loss and Penetration Loss In and Around Homes and Trees at 5.85 GHz” IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 46, NO. 11, NOVEMBER 1998.
[6] Ajay R. Mishra, John Wiley & Sons, Ltd, “Fundamentals of Cellular Network Planning and Optimisation” 2004.
[7] Walter Debus, Director of Engineering, Axonn, LLC “RF Path Loss & Transmission Distance Calculations”August 2006.
[8] L. M. Correia and P. O. Frances, “Estimation of materials characteristics from
power measurements,” in Proc. 5th IEEE Int. Symp. Personal, Indoor, Mobile
Radio Commun., Hague, The Netherlands, Sept. 1994, pp. 510–513.
[9] Morten Tolstrup, Technical Director, LGC Wireless, “Indoor Radio Planning A Practical Guide for GSM, DCS, UMTS and HSPA” 2008.
[10] M. Iskander, Z. Yun, and Z. Zhang, “Outdoor/indoor propagation modeling for wireless communications systems,” IEEE Antennas and Propagation Society International Symposium, vol. 2, pp. 150–153, July 2001.
[11] Y.-H. Lee , H. -W. Tseng , W.-C. Lee , J.-Y. Lin ,Y.-G. Jan1, and H.-W. Tsao“THE MEASUREMENT AND ANALYSIS OF WIMAX BASE STATION SIGNAL COVERAGE”, Progress In Electromagnetics Research C, Vol. 25, 223-232, 2012
指導教授 陳逸民(Y.M. Chen) 審核日期 2013-7-23
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