臺灣博碩士論文加值系統

在下一代行動通訊中，直接序列分碼多重進接技術(DS-CDMA)已經被採用以增加系統的容量及提高通訊品質。在此系統中能夠提供多媒體服務已經是一個必然的趨勢。一般而言，不同的媒體服務型態將有不同的服務品質(QoS)要求，所以如何有效地管理系統資源將是一個重要的課題。在過去的研究中，具模糊功率控制的方法已經被提出，但是它只能應用在單種傳輸速率系統下，對於多媒體系統而言，它並不適用。在本篇論文中，我們將提出新的結合模糊功率控制與傳輸速率選擇的方法在多媒體蜂巢式系統中，其中我們有提出三種不同的模糊架構對於傳輸速率的選擇方法，在這些方法中我們將提昇系統的平均傳輸速率、降低資料失敗傳輸的機率及避免傳輸速率頻繁地變動。

Direct sequence-code division multiple Access (DS-CDMA) technique has been proposed to increase the system capacity and the quality of communication for the next-generation cellular radio system. The DS-CDMA cellular system can support multimedia services that are the necessary trend. Generally, different service types require various qualities of service (QoS). Therefore, how to manage system resource effectively will be an important issue. In previous researches, fuzzy-based power control method has been proposed, but it is only applied in single transmission rate system. Hence, it is not suited in multimedia system. In this thesis, we will propose a novel combined fuzzy-based power control and transmission rate selection in multimedia cellular systems. We attempt to study three different fuzzy-based selection methods regarding transmission rate. We will increase the average transmission rate, decrease the probability of unsuccessful transmission, and avoid frequent change of transmission rate in multimedia cellular systems.

Table of Contents
Abstract in Chinese I
Abstract in English II
Table of Contents III
LIST of Figures V
List of Tables IX
Chapter 1 Introduction 1
1.1 Introduction to DS-CDMA Cellular Systems 1
1.2 Power Control of Cellular CDMA systems 3
1.3 Power Control for Multimedia CDMA Cellular Systems 5
Chapter 2 System Model 7
2.1 Channel Model 7
2.2 Performance Measurement 9
2.3 Introduction Fuzzy Login Controller (FLC) 11
Chapter 3 Combined Fuzzy-based Power Control and Transmission Rate Selection in CDMA Cellular Systems 14
3.1 Introduction 14
3.2 System Model 17
3.3 Combined Fuzzy-based Power Control and Transmission Rate Selection method 20
3.4 Simulation Model 23
3.5 Simulation Results 26
3.6 Summary 30
Chapter 4 Adaptive Fuzzy-based Power Control and Transmission Rate Selection in Multimedia CDMA Cellular Systems 44
4.1 Introduction 44
4.2 System Model 47
4.3 Adaptive Fuzzy-based Power Control and Transmission Rate Selection method 51
4.4 Simulation Model 55
4.5 Simulation Results 57
4.6 Summary 63
Chapter 5 Fuzzy-based for Combined Rate and Power Control in Multimedia CDMA Cellular Systems 75
5.1 Introduction 75
5.2 System Model 78
5.3 Fuzzy-based for Combined Rate and Power Control method 81
5.4 Simulation Model 84
5.5 Simulation Results 87
5.6 Summary 90
Chapter 6 Conclusions 100
References 102

[1]K. S. Gilhousen, I. M. Jacobs, R. Padovani, A. J. Viterbi, L. A. Weaver, and C.E.Wheatley, “On the capacity of a cellular CDMA system”, IEEE Trans. Veh. Technol., vol. 40, pp. 303-312, May 1991.
[2]P. Taaghol, P. Monogioudis, R. Tafazolli and B. G. Evans, “Power control in CDMA Based PCN,” IEE Colloquium on Spread Spectrum Techniques for Radio Communication Systems, PP. 5/1-5/6, 1994.
[3]J. H. Wen, L. C. Yeh, and J. R. Chiou, ”Short-term fading prediction-based power control method for DS/CDMA cellular mobile radio networks”, Proceeding of 8th International Symposium on PIMRC’97, Finland, 1-4 Sept. 1997.
[4]N. R. Sripada, D. G. Fisher, and A. J. Morris, “AI applications for process regulation and servo control setting,” Proceedings of the IEE, vol. 134, pp. 251-259, 1987.
[5]P. R. Chang and B. C. Wang, “Adaptive fuzzy power control for CDMA mobile radio system,” IEEE Transactions on Vehicular Technology, vol.45, pp. 225-236, May 1996.
[6]P. R. Chang and B. C. Wang, ”Adaptive fuzzy proportional integral power control for a cellular CDMA system with time delay,”IEEE Journal on Selected Areas in Communications, vol. 14, pp. 1818-1829, Dec. 1996.
[7]Jianming Wu and R. Kohno, “Wireless multimedia CDMA system based on transmission power control,” Sixth IEEE International Symposium on PIMRC'95, vol. 1, pp. 36-40, 1995.
[8]Sampath, A., Sarath Kumar, P. and Holtzman, J.M., “Power control and resource management for a multimedia CDMA wireless system,” Sixth IEEE International Symposium on PIMRC'95. Vol. 1, pp. 21-25, 1995.
[9]Chi Wan Sung N and Wing Shing Wong, “Power control for multirate multimedia CDMA systems,” IEEE INFOCOM '99, Eighteenth Annual Joint Conference of the IEEE Computer and Communications Societies, Proceedings, vol. 2, pp. 957 —964, 1999.
[10]Jeong Ho Kim, Young Woo Kim, and Dan Keun Sung, “A power control structure for multimedia traffic,” IEEE 49th Vehicular Technology Conference, Vol. 2, pp.1525 —1529, 1999.
[11]Seong-Lyun Kim, Rosberg, Z. and Zander, J., “Combined power control and transmission rate selection in cellular networks,” IEEE 50th Vehicular Technology Conference, vol. 3, pp. 1653 -1657, 1999.
[12]C. C. Lee. “Fuzzy logic in control systems: fuzzy logic controller-part I,” IEEE Trans. On Vet. Technol., vol 20 No 2 pp. 404-418, March/April 1990.
[13]H. J. Kwon, Y. Lee, S. C. Kim and K. H. Tchah, “Performance of an adaptive fuzzy rule-based closed-loop power control in low earth orbit mobile satellite communication systems,” IEEE TENCON, vol. 1, pp. 27 -30, 1999.
[14]H. X. Li and H. B. Gatland, “A new methodology for designing a fuzzy logic controller”, IEEE Trans. Syst., Man, Cybern., 25, pp. 505-512, 1995.
[15]R. Jantti and S. L. Kim, “Selective power control with active link protection for combined rate and power management,” IEEE 51st VTC, Tokyo, vol. 3, pp. 1960—1964, Spring 2000.
[16]Jyh-Yuan Wang, “Research on distributed balancing power control methods for DS/CDMA cellular mobile systems,” thesis, 1999.
[17]Jyh-Liang Chen, “Performance Evaluation for Multimedia CDMA Cellular Communication Systems with Power Control Methods,” thesis, 2001.
[18]X. Wu, L. Ge and G. Liang, ”Adaptive power control on the reverse link for CDMA cellular system”, IEEE 15th APCC/OECC'99, vol.1, pp. 608-611, 1999
[19]Y. M. Siu and K. K. Soo, “CDMA mobile systems with tailor made power control to each mobile station”, IEE 3G Mobile Communication Technologies, pp. 46-50, 2000
[20]S. L. Su, Y. C. Su and J. F. Hung, “Grey-Based Power Control for DS-CDMA Cellular Mobile Systems”, IEEE Trans. Veh. Technol., vol. 49, pp. 2081-2088, Nov. 2000.
[21]C. J. Chang, J. H. Lee and F. C. Ren, “Design of Power Control Mechanisms with PCM Realization for the Uplink of a DS-CDMA Cellular Mobile Radio System”, IEEE Trans. Veh. Technol., vol. 45, pp. 522-530, Aug. 1996.
[22]S. A. Grandhi, J. Zander and R. Yates, “Constrained power control”, Wireless Personal Communications, vol. 1, No. 4, pp. 257-270, 1995.