Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7190
標題: 多重服務正交分頻多工系統中具有交換基礎子通道分配方法
The Switch-based Subcarrier Allocation Policies in Multi-service OFDM Systems
作者: 周佳慶
Chou, Chia-Ching
關鍵字: 正交分頻多工;OFDM;服務品質;權重式循環;QoS;WRR
出版社: 電機工程學系所
引用: Cheong Yui Wong, R.S. Cheng, K.B. Lataief, R.D.Murch,"Multiuser OFDM with adaptive subcarrier, bit, and power allocation", emph{in Proc. IEEE Journal on Selected Areas in Communications}, pp.1747-1758, Oct. 1999 R.F.H. Fischer and J.B. Huber, " A New Loading Algorithm for Discrete Multitone Transmission", in Proc. IEEE Globecom'96, London, UK, pp.724-728, Nov. 1996 R.V. Sonalkar, D. Applegate, "Shannon capacity of frequency-overlapped digital subscriber loop channels", in Proc. IEEE ICC'02, Vol. 3, pp.1741- 1745, May 2002 R.Grunheid, E.Bolinth, H Rohling, " A blockwise loading algorithm for the adaptive modulation technigue in OFDM systems",in Proc. IEEE Vehicular Technology Vonference, Vol. 2, pp. 948-951, Oct. 2001 Jianmin Mao, W. Melody Moh ,Belle Wei, "PQWRR Scheduling Algorithm in Supporting of DiffServ", in Proc. IEEE ICC'01, pp. 679-684, June 2001 Manolis G. H. Katevenis,"Fast Switching and Fair Control of Congested Flow in Broadband Networks", in Proc. IEEE Journal on Selected Areas in Communications, Vol. 5, pp. 1315-1326, Oct. 1987 R.van Nee and R. Prasad,"OFDM for Wireless Multimedia Communications".2000. L. Hanzo, M. Munster, B.J. Choi and T. Keller,"OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting".2003. Weinstein, S. B., and P .M. Ebert, "Data Transmission by Frequency Division Multiplexing Using the Discrete Fourier Transform," IEEE Trans. Comm., Vol. COM-19, pp. 628 - 634, Oct. 1971. L. Hanzo, W. Webb, and T. Keller, Single- and Multi-Carrier Quadrature Amplitude Modulation: Principles and Applications for Personal Communications, WLANs and Broadcasting. John Wiley and IEEE Press, 2000. J. K. Cavers, "An Analysis of Pilot Symbol Assisted Modulation for Rayleigh Fad-ing Channels,"IEEE Transactions on Vehicular Technology, vol. 40 pp 686-693 November 1991. Van de Beek, J. J., M. Sandell, M. Isaksson, and P. O. Borjesson, "Low-Complex Frame Synchronization in OFDM Systems," Proceedings of International Conference on Universal Personal Communications ICUPC''95, Nov. 1995. Sandell, M., J. J. van de Beek, and P. O. Borjesson, "Timing and Frequency Synchronization in OFDM Systems Using the Cyclic Prefix,"Proceedings of Int.Symp. On Synchronization}, Saalbau, Essen, Germany, 1995, pp. 16-19, Dec. 14-15,1995. Moose, P. H., "A Technique for Orthogonal Frequency Division Multiplexing Frequency Offset Correction," IEEE Trans. on Comm., Vol. 42, No. 10,pp. 2908-2914, Oct. 1994. Wamer, W. D., and C. Leung, "OFDM/FM Frame Synchronization for Mobile Radio Data Communization," IEEE Trans. on Vehicular Tech.,Vol. 42, No. 3, pp.302-313.Aug. 1993. Schmidi, T. M., and D. C. Cox, "Robust Frequency and Timing Synchronization for OFDM," IEEE Trans. on Comm., Vol. 45, No. 12, pp.1613-1621, Dec. 1997. Lambrette, U., M. Speth, and H. Meyr, "OFDM Burst Frequency Synchronization by Single Carrier Training Data," IEEE Communications Letters, Vol. 1, No. 2, pp. 46-48, Mar. 1997. A. Leon-Garcia, I. Widjaja, "Communication Networks Fundamental Concepts and Key Architectures".2000. M. Katevenis, S. Sidiropoulos, C. Courcoubetis, "Weighted round-robin cell multiplexing in a general-purpose ATM switch chip",IEEE Journal on Selected Areas in Communications, Vol. 9, Issue: 8, October 1991, pp. 1265 -1279. J. Wang, and Y. Levy, "Managing performance using weighted round-robin", Computers and Communications, 2000. Proceedings. ISCC 2000. Fifth IEEE Symposium on, 2000, pp. 785-792. H. Yokota, M. Forsberg, and T. Asami, "Extension to Weighted Round Robin Packet Scheduling for Variable-length Packet Networks", IEICE Trans. Inf. and Syst., vol. E82-D, no. 3, pp. 668-676, March, 1999. Wei Wang, Keun Chul Hwang, Kwang Bok Lee, and Saewoong Bahk,"Resource Allocation for Heterogeneous Services in Multiuser OFDM Systems", in Proc. IEEE GLOBECOM''04, Volume 6, pp.3478- 3481, Nov. 2004
摘要: 
在本篇論文中,我們將介紹在多重服務正交分頻多工系統中具有交換基礎子通道分配演算法和適應性調變。傳統方法被提議用來最佳化系統性能,例如頻寬效率,錯誤率等。然而這些方法可能會造成在資源分配上的不公平性。因此在本篇論文中,一種依據權重式循環機制(WRR)新資源分配演算法被提議來克服這個不公平性,增進系統的吞吐量和將每一個別資料流的佇列長度維持在預先界定的區域中。同時在不同的子通道結合可調適性分配不僅僅增加頻寬效率也在有限資源環境中最佳化整體性能。有能力維持佇列長度能保證佇列延遲符合最小定律。這個特色使的被提議的方法適合延遲限制的服務,初步的模擬結果展示上述能力。

In this thesis, we present a switch-based algorithm
allocating sub-channels and an adaptive modulation in
multi-service stream orthogonal frequency division multiplexing (OFDM) systems. Conventional schemes were proposed to optimize the system performance, such as bandwidth efficiency, Bit error rate (BER), and etc. However, these schemes could result in the unfairness in resource allocation. Thus, in this work, a new resource allocation algorithm based on weighted round robin (WRR)
is proposed to conquer this unfairness, improve the system
throughput and maintain the queueing length of each individual stream to a predefined region. Meanwhile, combining the adaptive assignment in diverse sub-channels not only augments the bandwidth efficiency but also sub-optimizes the entire performance in the environment with the limited resource. The ability of maintaining the queueing length could guarantee the queueing delay according to Little''s law. This feature makes the proposed approach suitable for delay constraint services. The preliminary simulation results demonstrate the aforementioned ability.
URI: http://hdl.handle.net/11455/7190
其他識別: U0005-3107200611211200
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