跳到主要內容

臺灣博碩士論文加值系統

(44.192.38.248) 您好!臺灣時間:2022/11/30 05:49
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

我願授權國圖
: 
twitterline
研究生:呂學翰
論文名稱:資料無線下載之負載感測天線傳送功率控制
論文名稱(外文):Load-aware Antenna Power Level Control for Wireless Forward Link Data Services
指導教授:蔡榮宗蔡榮宗引用關係
指導教授(外文):Jung-Tsung Tsai
學位類別:碩士
校院名稱:國立臺灣師範大學
系所名稱:資訊教育學系
學門:教育學門
學類:專業科目教育學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:英文
論文頁數:79
中文關鍵詞:功率控制動態資源配置下傳行動通訊網路基地台間的干擾
外文關鍵詞:power controldynamic resource allocationdownlinkcellular data networksinter-cell interference
相關次數:
  • 被引用被引用:0
  • 點閱點閱:178
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:1
在無線蜂巢式網路中,基地台的涵蓋範圍通常會與鄰近的基地台重疊,以提供邊界的使用者能成功通訊的機會,但是卻因此也增加了基地台之間的互相干擾程度,而降低了使用者的資料傳輸速率。所以我們利用基地台天線傳送功率控制,來減輕使用者受到鄰近基地台的干擾,已達到增進使用者資料傳輸效率的目的。我們假設基地台能夠提供兩種分別為高及低的傳輸功率,並藉由感測每一個細胞格的負載狀況,將這兩種傳輸功率適當的分配給每一個基地台。在我們的方法中,是盡量將負載較高的細胞格基地台設定為高傳輸功率,而將其鄰近負載較低的細胞格基地台設定為低傳輸功率。由程式模擬的結果顯示,這樣的方法可以讓使用者傳輸資料的延遲,有不錯的改善。再來我們考慮細胞格內的負載,並不會一直如預期的均勻分布在細胞格內,所以考慮更進階的方法,來克服不均勻的傳輸負載的情況。在進階的方法中,能夠利用細胞格的負載偏向方位,進而設定其附近的基地台天線傳輸功率。程式模擬的結果顯示,在時間上以及空間上的不均勻傳輸負載,我們的方法都能明顯的減少使用者所需等待的延遲時間。
We propose power level control schemes to improve the forward link data throughput of mobile users in cell edges where inter-cell interference is significant. We assume that the antenna power of base station (BS) can be adjusted to full power (high power level), reduced power (low power level), and no power. We then propose algorithms by which the cell with the highest loading is first chosen to transmit at high power level while some of its neighboring cells with lighter loading are chosen to transmit at low power level. Such a procedure is repeated until each BS antenna is set to a proper power level. We further assume that the information of sectorized loading is available and then modify the proposed algorithms taking into account the information.
Based on numerical data all obtained from simulations, we study the performance of the proportional fair scheduling under proposed power level control schemes. Results show that our schemes are able to achieve more favorable delay-throughput characteristics, less interference holes, and traffic hot-spot relief.
Chapter 1.Introduction 1
1.1 Background 1
1.2 Objective 3
1.3 Related Work 4
1.4 Thesis Organization 6

Chapter 2.System Model 7
2.1 System Model 7
2.2 Radio Propagation Path-loss Models 7
2.3 Traffic Model 9
2.4 Packet Scheduling Policy 11

Chapter 3.Power Control Algorithms 12
3.1 Assumption 12
3.2 No Power Control (NPC) 12
3.3 Simple Power Control Scheme (SPCS) 13
3.4 Load-aware Power Control Scheme (LPCS) 14
3.4 Load-aware Power Control with Adjacent Half Cell Loading (LPCAL) 17
3.5 Load-aware Power Control with Sector Loading Detection (LPCSL) 19

Chapter 4.Simulation 22
4.1 Simulation model 22
4.2 Simulation Scenario 27

Chapter 5.Experiment Result and Discussion 30
5.1 One-dimensional scenario 30
5.1.1 Two antenna power levels for the service of batch arrivals 30
5.1.2 Three antenna power levels for the service of session-based data traffic 40
5.2 Two-dimensional scenario 46
5.2.1 Uniform traffic 46
5.2.2 Temporal hot-spots 55
5.2.3 Spatial hot-spot 63
5.3 Improvements method on the proposed algorithms 73

Chapter 6.Conclusion and Future Work 77
Reference 78
[1] J-G Choi, H-K Lim, Y-J Choi, and S. Bahk, “Downlink throughput enhancement by combining packet scheduling with a simple power control scheme in CDMA data networks”, in Proc. of IEEE Mobile and Wireless communications Network(MWCN),vol. 1, pp.93-97, Sep. 2002.

[2] T. S. Rappaport, “Wireless Communications: Principles and Practice”, Prentice Hall, 1996.

[3] Q. Wu and E. Esteves, “The cdma2000 high rate packet data system,” QUALCOMM : 80-H0593-1, Rev. A, March 2002.

[4] Qualcomm, Inc., “1xEV: 1x evolution IS-856 TIA/EIA standard airlink overview”, Nov 7, 2001, Revision 7.2

[5] Jung-Tsung Tsai and Hui-Chen Hsieh “Adaptive antenna power level control for wireless forward link data services” in Proc. of IEEE Wireless Communications and Networking Conference(WCNC), 2006.

[6] P. Bender, P. Black, M. Grob, R. Padovani, N. Sindhushayana, and A.Viterbi, “CDMA/HDR: a bandwidth-efficient high-speed wireless data service for nomadic users”, IEEE Communications Magazine, pp. 70- 77,July, 2000.

[7] M. Gudmundson, “Correlation model for shadow fading in mobile radio systems,” Electronics Letters, vol. 27, pp. 2145–2146, 1991.

[8] G. L. St¨uber, “Principles of Mobile Communication”. Kluwer Academic Publishers, 1996.


[9] Junshan Zhang, Ming Hu, and Shroff, N.B. “ Bursty data over CDMA: MAI self similarity, rate control and admission control” in Proc. IEEE INFOCOM, 2002.

[10] Ching-Yu Liao, Fei Yu, Leung, V.C.M., Chung-Ju Chang, “A novel dynamic cell configuration scheme in next-generation situation-aware CDMA networks” IEEE Journal on Selected Areas in Communications, Volume 24, Issue 1, Jan. 2006, pp.16 - 25

[11] A.Jalali, R.Padovani, R.pankaj, “Data throughput of CDMA-HDR a high efficiency-high data rate personal communication wireless system”, in Proc. of IEEE Vehicular Technology Conference,(VTC) Spring, vol.3, pp.1854-4858, May,2000.

[12] J.Nasreddine, X.Lagrange, “A simplified generic optimum power control scheme for CDMA cellular systems” in Proc. of IEEE Global Telecommunications Conference Workshops, 2004.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
1. 20.胡殿選、邱文敏,2002,移轉訂價導論,實用月刊,頁62-65。
2. 19.洪振添、鄭瑪莉,1994,國際租稅規劃問題研究--企業海外投資的稅務障礙 (下),會計研究月刊,第102期,頁60-65。
3. 16.林妙雀,1999,國際移轉計價決策制定型態影響因素之研究-台灣企業之實證分析,輔仁管理評論,第6卷第2期,頁101~134。
4. 12.吳德豐,2004,租稅對跨國企業的影響,會計研究月刊,第229期,頁92-96。
5. 7.何志峰,2000,國際移轉計價之理論與實務應用,萬能商學學報,頁97-116。
6. 3.李文發,1993,從國人競赴租稅庇護所設立公司談國際租稅規避問題,財稅研究,第24卷第2期, 頁30-32。
7. 21.凌忠嫄、簡錦紅、李怡慧,1992,移轉訂價問題之研究,財稅研究,24(6):頁1-41。
8. 22.翁妙慈,1993,租稅規劃可降低企業稅負,會計研究月刊,第80期,頁54。
9. 27.莊義雄、魏敏全,2005,關係企業移轉訂價之因應策略,今日會計,第98期,頁62-74。
10. 29.許祺昌、廖庭璉,2005,營利事業應評估移轉訂價查核準則實施之風險及因應之道,稅務旬刊,第1921期,頁29-31。
11. 30.許秀芳,2005,荷蘭導管公司新規定對台商跨國企業的租稅影響,稅務旬刊,第1932期,頁16-20。
12. 35.黃文卿、林晏州,1998,深度訪談之理論與技巧--以陽明山國家公園遊園專車推動為例,國家公園學報,8 卷2 期,頁166-178。