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系統識別號 U0002-0909200908085800
中文論文名稱 基植於IEEE802.16 OFDMA網路上設計一考量下載資源管理之Burst調整、重疊與重排機制
英文論文名稱 Burst Adjustment, Overlapping, and Relocation Schemes for Downlink Resource Allocation in IEEE 802.16 OFDMA Networks
校院名稱 淡江大學
系所名稱(中) 資訊工程學系資訊網路與通訊碩士班
系所名稱(英) Master's Program in Networking and Communications, Department of Computer Science and Information Engineering
學年度 97
學期 2
出版年 98
研究生中文姓名 林柏宇
研究生英文姓名 Po-Yu Lin
學號 696420669
學位類別 碩士
語文別 中文
口試日期 2009-07-21
論文頁數 54頁
口試委員 指導教授-石貴平
委員-許獻聰
委員-王三元
委員-陳弘璋
委員-石貴平
中文關鍵字 IEEE 802.16  正交分頻多工多重存取  下行資源配置 
英文關鍵字 IEEE 802.16  OFDMA  Downlink Resource Allocation 
學科別分類 學科別應用科學資訊工程
中文摘要 在IEEE 802.16 OFDMA-TDD系統下,DL-Burst排程機制是由多個矩形組成的二維空間。DL-burst是BS分配給SS的頻寬需求。在下行資源頻寬分配下,BS會因應每個SS在不同的Subchannel的CINR值選擇最適當的調變和編碼速率給每個SS。因此,為了追求更高throughput和capacity的系統下,BS會選擇最佳調變和編碼速率的Sub-channel給予每個SS。不當的DL-burst排程機制將會造成內部碎裂問題(Internal Fragmentation Problem, IFP)以及外部碎裂問題(External Fragmentation Problem, EFP)進而導致降低整體網路的效能。為了改善系統的效能,本論文針對已排程的Burst資源,提出Burst Adjustment, Overlapping, and Relocation(BAOR)機制,而在BRS機制中包含了Fragmentation Combination、Best Fit Relocation 和BOAS策略。BOS機制在可執行的情況下,可以讓內部碎裂slots重複地被使用。再經由BAS機制增加些微的MAP-overhead讓burst的配置型態有更多的配置種類,並隨著BRS機制的演算法,能因應配置環境做適當的變化調整burst,減少內部碎裂浪費和外部碎裂浪費,進而提升整體網路throughput。由實驗數據可以得知,本論文所提出的BAOR機制能改善已配置完成DL-Burst排程機制,可減少內部碎裂資源與外部碎裂資源浪費,提升網路資源利用率。
英文摘要 Downlink Resource is two-dimensional space composed of many rectangular downlink burst traffics. A DL-burst traffic is the bandwidth allocation for SSs allocated by the BS. In downlink bandwidth allocation, BS would select the robust modulation to each SS according to the CINR of allocated sub-channel for each SS. With view to reaching to the High throughput and system capacity in IEEE 802.16 OFDMA system, the BS selects the sub-channel with the high modulation and the coding rate. However, unsuitable burst placement scheduling causes Internal Fragmentation Problem (IFP) and External Fragmentation Problem (EFP) and then it causes the system capacity down. In order to improving the system efficiency, we propose a Burst Adjustment, Overlapping, and Relocation Schemes (BAOR). In the availability of BOS, the unused slots of IFP can be reused. By using BAS, it makes the allocated rules of the burst traffics variable in OFDMA system and BRS will reduce the unused slots of the IFP and EFP and increase the throughput of the system. From Simulation result, (BAOR) Schemes can improve efficiently IFP and EFP, and increase the resource utilization and system throughput.
論文目次 第1章 緒論 - 1 -
1.1 前言 - 1 -
第2章 IEEE 802.16背景與相關文獻 - 5 -
2.1 IEEE802.16背景 - 5 -
2.1.1 OFDMA Frame Structure介紹 - 5 -
2.1.2 MCS(modulation and coding Scheme) - 11 -
2.2 問題描述 - 13 -
2.2.1 內部碎裂問題(Internal Fragmentation Problem) - 13 -
2.2.2 外部碎裂問題 (External fragmentation Problem) - 15 -
2.3 Related work - 16 -
第3章 Burst Overlapping and Adjustment Scheme - 19 -
3.1 Burst Overlapping Scheme(BOS) - 19 -
3.2 Burst Adjustment Scheme(BAS) - 22 -
第4章 Burst Relocation Schemes(BRS) - 27 -
4.1.1 Fragmentation Combination - 29 -
4.1.2 Best Fit Relocation - 32 -
4.1.3 Shifting Relocation by BOAS - 34 -
第5章 實驗與模擬 - 38 -
第6章 結論 - 45 -
Reference - 46 -
附錄-英文論文 - 48 -

圖目錄
Fig. 1. TDD 模式[2] - 6 -
Fig. 2. OFDMA Frame Structure[2] - 7 -
Fig. 3. Burst Location Definition[2] - 8 -
Fig. 4. Burst的組成 - 9 -
Fig. 5. MAC Header資訊[2] - 9 -
Fig. 6. DL-MAP_IE()[2] - 10 -
Fig. 7. Data mapping[2] - 13 -
Fig. 8. 內部碎裂問題 - 14 -
Fig. 9. Burst重疊利用機制 - 20 -
Fig. 10.The Feasibility of BOS - 21 -
Fig. 11.DL-Burst allocation - 22 -
Fig. 12.IFP Parameters in DL-MAP_IE() - 23 -
Fig. 13.Burst Adjustment types - 24 -
Fig. 14.Burst型態組合 - 24 -
Fig. 15.The example of BAS and BOS. - 25 -
Fig. 16.Defination of the Bursti - 28 -
Fig. 17.碎裂空間集合 - 30 -
Fig. 18.Example of Fragmentation Combination - 31 -
Fig. 19.配置區域空間 - 33 -
Fig. 20.Shifting Relocation by BOAS(1) - 36 -
Fig. 21.Shifting Relocation by BOAS(2) - 37 -
Fig. 22.Average Throughput - 39 -
Fig. 23.Number of Service SS - 40 -
Fig. 24.Average Utilization Ratio - 41 -
Fig. 25.Average Throughput (BOAS vs.without BOAS) - 42 -
Fig. 26.Number of Service SS(BOAS vs.without BOAS) - 43 -
Fig. 27.Utilization(BOAS vs.without BOAS) - 44 -

表目錄
表.1. Modulation and Coding rate, MCS[2] - 12 -
表.2. 實驗相關參數 - 38 -




參考文獻 [1] IEEE Std. 802.16-2004,”IEEE Standard for Local and Metropolitan Are etworks-Part 16: Air Interface for Fixed Broadband Wireless Access System”, IEEE Std., October, 2004.
[2] IEEE Draft Std. P802.16Rev2/D8,”IEEE Draft Standard for Local and Metropolitan Area Networks –Part 16:Air Interface for Broadband Wireless Access Systems”, IEEE Std., December 2008
[3] Amos Israeli., Dror Rawitz., Oran Sharon., “On the Complexity of Sequential Rectangle Placement,” in Proceedings of the Information and Computation Volume 206 , Issue 11 , pp.1334-1345 , November 2008.
[4] Cohen, R., Katzir, L., “Computational analysis and efficient algorithms for micro and macro OFDMA scheduling,” in Proceedings of The 27th Conference on Computer Communications (INFOCOM), pp.1184-1192, Haifa, April 2008.
[5] Ben-Shimol, Y. Kitroser, I. Dinitz, Y. , “Two-Dimensional Mapping for Wireless OFDMA Systems,” in Proceedings of the IEEE Transactions on Broadcasting Volume: 52, Issue: 3 , Sept. 2006 .
[6] Desset, C. de Lima Filho, E.B. Lenoir, G., “WiMAX Downlink OFDMA Burst Placement for Optimized Receiver Duty-Cycling,” in Proceedings of the IEEE International Conference on (ICC), pp.5149-5154, June 2007.
[7] T. Ohseki, M. Morita, and T. Inoue, ”Burst Construction and Packet Mapping Scheme for OFDMA Downlinks in IEEE 802.16 Systems, “ in Proceeding of the IEEE Global Telecommunications Conference (GLOBECOM), pp. 4307-4311, November 2007.
[8] A. Bacioccola, C. Cicconetti, L. Lenzini, E. Mingozzi, and A. Erta, “A Downlink Data Region Allocation Algorithm for IEEE 802.16e OFDMA,” in Proceeding of the IEEE International Conference on Information, Communications & Signal Processing, December 2007
[9] T. Wang; H, Feng; B. Hu,” Two-Dimensional Resource Allocation for OFDMA System,” in Proceedings of the IEEE International Conference on(ICC), May 2008
[10] N. Ruangchaijatupon and Y. Ji, “Simple Proportional Fairness Scheduling for OFDMA Frame-based Wireless Systems,” in Proceeding of the IEEE International Conference on Wireless Communications and Networking Conference (WCNC), pp.1593-1597, March 2008.
[11] Ali-Yahiya, T. Beylot, A.-L. Pujolle, G. , “RADIO RESOURCE ALLOCATION IN MOBILE WIMAX NETWORKS USING,” in Proceedings of the IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2007), pp.1-5, Sept. 2007.
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