跳到主要內容

臺灣博碩士論文加值系統

(3.87.250.158) 您好!臺灣時間:2022/01/25 18:40
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

: 
twitterline
研究生:陳鴻達 
論文名稱:CDMA/TDD系統中整合語音及資料服務之有效頻寬分配機制
論文名稱(外文):An Efficient Bandwidth Allocation Scheme for Integrated Voice/Data Services in CDMA/TDD Systems
指導教授:歐陽彥杰
指導教授(外文):Ouyang, Y.C
學位類別:碩士
校院名稱:國立中興大學
系所名稱:電機工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:英文
論文頁數:51
中文關鍵詞:頻寬分配機制時槽分配IMT-2000CDMA/TDD
外文關鍵詞:Bandwidth Allocation SchemeTime Slot AllocationIMT-2000CDMA/TDD
相關次數:
  • 被引用被引用:0
  • 點閱點閱:1389
  • 評分評分:
  • 下載下載:299
  • 收藏至我的研究室書目清單書目收藏:1
在第三代行動通訊使用CDMA/TDD 系統中,上傳和下傳的不平衡流量將不再是一個嚴重的間題,我們可以在分時多工的系統中利用簡單的功率控制的方法,或者是新的媒體存取控制的機制去解決上傳和下傳流量不對稱的問題。換句話說,在CDMA/TDD的系統中,我們可以動態的調整上傳和下傳不對稱的時槽分配來解決上下傳流量不正衡的問題。在這篇論文中,我們提供了在CDMA/TDD系統下一個新的方法,用來有效的改善不論是系統的利用率或是系統的阻塞率(Blocking Probability)。頻寬分配機制(Bandwidth Allocation Scheme)將定期比較上傳和下傳的負載流量,來預測和分配在下一個時段的上傳和下傳的時槽數目,然而在系統的效能方面,我們將比較系統的利用率以及阻塞率等等。我們利用電腦模擬的方法發現不管是語音或是資料在不平衡的流量系統中,我們可以發現頻寬分配機制都可以得到較好的效能結果。

In the CDMA/TDD system, the traffic unbalance problem can be solved by providing an easy power control method or propose a new MAC protocol for a time-division duplex (TDD) wideband CDMA system. On the other hand, the CDMA/TDD system can dynamic adjust the unbalanced time slot allocation between the two links to solve the traffic unbalance problem. In this thesis, we propose a new scheme for CDMA/TDD system, which can effectively improve the blocking probability, and system utilization. The Bandwidth Allocation Scheme procedure compared the offer load ratio of the two traffics, and forecast the number of uplink and downlink time slots in the next frame. The system utilization and blocking probability were investigated. The performance of voice and data on unbalance traffic system is simulated by computer. The proposed scheme yields the better performance than CDMA/TDD system.

1.Introduction
2.The Description of CDMA/TDD Systems
3.TDD System Architecture and Traffic Model
4.Bandwidth Allocation Scheme
5.Conclusion and Future Work

[1] I. Koo, E. Kim, and K. Kim, “ Erlang Capacity of Voice / Data DS-CDMA System with Prioritized Services”, IEICE Trans. Commun. vol. E84-B, no. 4 , pp. 716-726, April 2001.
[2] J.G. Choi and S. Bahk, “Multiclass Call Admission Control in QoS-Sensitive CDMA Networks”, ICC, vol. 2, pp. 331-335, 2001.
[3] W. Choi and J.Y. Kim, “ Joint Erlang Capacity of DS/CDMA Forward Link Based on Resource Sharing Algorithm”, IEICE Trans. Fundamental. Vol. E84-A, no. 6, pp. 1406-1412, June 2001.
[4] W.S. Jeon and D.G. Jeong, “Comparison of Time Slot Allocation Strategies for CDMA/TDD Systems”, IEEE J. Select. Areas Commun., vol. 18, pp.1271-1278, July 2000.
[5] D.G. Jeong, I.G. Kim, and D. Kim, “Capacity Analysis of Spectrally Overlaid Multiband CDMA Mobile Networks”, IEEE Trans. Veh. Technol., vol. 47, pp.798-807, Aug. 1998.
[6] J.D. Vriendt, P. Laine, C. Leronge, and X. Xu, “Mobile Network Evolution: A Revolution on the Move”, IEEE Commun. Mag. vol. 40, no.4, pp. 104-111, April 2002.
[7] K. Pahlavan, and A.H. Levesque, Wireless Information Networks, 1th ed, New York:Wiley, 1995.
[8] T. Ojanpera, and R. Prasad, “An Overview of Air Interface Multiple Access for IMT-2000/UMTS”, IEEE Commun. Mag. IEEE Commun. Mag. vol. 36, no.9, pp.82-86, Sept. 1998.
[9] W. Wong, and E.S. Sousa, “Feasibility Study of TDD- and FDD-CDMA Frequency Sharing Cellular Networks”, ICUPC’98, vol. 1, pp. 531-535, 1998.
[10] J.R. Gordon, “Frequency and Time Division Duplex Techniques for CDMA Cellular Radio”, IEEE ISSSTA’94 vol. 1, pp. 309-313, 1994.
[11] http://www.tdscdma-forum.org/
[12] 3G. TS 25.221 “Physical Channels and Mapping of Transport Channels onto Physical Channel”
[13] D.G. Jeong, and W.S. Jeon, “CDMA/TDD System for Wireless Multimedia Services with Traffic Unbalance Between Uplink and Downlink”, IEEE J. Select. Areas Commun. vol.17, no.5, pp. 939-946, May 1999.
[14] D.G. Jeong, and W.S. Jeon, “Capacity of CDMA/TDD Systems for Mobile Multimedia Services”, IEEE VTC, vol. 5, pp. 2606-2610, 1999.
[15] Y. Fang, Y. Zhang, “Call Admission Control Scheme and Performance Analysis in Wireless Mobile Networks”, IEEE Trans. Veh. Tech. vol. 51, no.2, pp.371-382, March 2002.
[16] M. Shati, A. Hashimoto, M. Umehira, S. Ogose, and T. Murase, “Wireless Communications in the Twenty-First Century: A Perspectvie”, Proceeding of IEEE, vol.85, pp.1622-1638, Oct. 1997.
[17] Y. Guo, and H. Chaskar, “Class-Based Quality of Services over Air Interfaces in 4G Mobile Networks”, IEEE Commun. Mag. vol. 40, no.3, pp.132-137, March 2002.
[18] V. Huang, and W. Zhang, “QoS-Oriented Access Control for 4G Mobile Multimedai CDMA Communications”, IEEE Commun. Mag. vol. 40, no.3, pp.118-125, March 2002.
[19] I.F. Akyildiz, D.A. Levine, and I. Joe, “A Slotted CDMA Protocol with BER Scheduling for Wireless Multimedia Networks”, IEEE/ACM Trans. Networking, vol. 7, no. 2, pp.146-158, April 1999.
[20] H. Yomo, A. Nakata, and S. Hara, “An Efficient Slot Allocation Algorithm to Accommodate Multimedia Traffic in CDMA/TDD-Based Wireless Communications Systems”, IEICE Trans. Fundametals, vol.E84-A, no.12, pp. 3068-3076, Dec. 2001.
[21] H. Uehara, M. Fujihara, M. Yokoyama, and H. Ito, “Slot Assignment Scheme for Integrated Voice and Data Traffic in Reservation-Type Packet Radio Networks”, IEEE PIMRC vol. 1, pp. 222-226, 2000.
[22] S.H. Cho, S.J. Yang, S. Hen, S.H. Park, “QoS Oriented Bandwidth Management Scheme for Stable Multimedia Services on the IMT-2000 Networks”, Proceedings. International Conference on Information Technology: Coding and Computing, pp.289-294, 2000.
[23] R. Ramjee, R. Najarajan, and D. Towsley, “On Optimal Call Admission Control in Cellular Networks”, IEEE INFOCOM’96, vol. 1, pp. 43-50 1996.
[24] W.S. Jeon, and D.G. Jeong, “Call Admission Control for Mobile Multimedia Communications with Traffic Asymmetry Between Uplink and Downlink”, IEEE Trans. Veh. Tech. vol. 50, no. 1, pp. 59-66, Jan. 2001.
[25] D.G. Jeong, W.S. Jeon, “Time Slot Allocation in CDMA/TDD Systems for Mobile Multimedia Services”, IEEE Commun. Letter, vol. 4, no. 2, pp. 59-61, Feb. 2000.

QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top