應用於WiMAX網路電視跨層群播機制之研究

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姓名

李佳翰(Chia-han Lee) 查詢紙本館藏

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資訊工程學系

論文名稱

應用於WiMAX網路電視跨層群播機制之研究
(Study of Cross-Layer Multicast Scheduling for IPTV over WiMAX)

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摘要(中)

由於目前消費性電子產業崛起，加上許多服務例如數位影像廣播(DVB)及數位電視頻道的播送，隨時隨地經由消費性電子產品接收影音娛樂資訊已經勢在必行，且在無線接取網路技術的趨近成熟下，尋求殺手級的應用(killer application)以提供服務供應商以及消費者雙方面的利益共享，將會影響下一網路世代的發展趨勢，因此，視訊群播(video multicast)的應用被視為將會對一般大眾最有吸引力且最具有無限發展潛力的應用。
本研究主要發展於WiMAX無線接取網路環境，採用具有高彈性分配頻譜資源特性的OFDMA PHY層，利用二維的頻譜分配，加上SVC(Scalable Video Coding)影像編碼技術的分層方式，確實跨層地利用PHY層的使用者通道資訊，先針對頻率軸找出各自適合的subchannel，再針對時間軸作SVC影像分層群播，以達成本論文跨PHY層與MAC層的群播機制。
本文提出的跨層群播資源分配方法達成在有限的無線網路頻寬資源情況下，根據各個使用者與傳送端之間的通道狀況好壞，盡可能降低消耗的無線網路資源，並保證每個接收端的基本影像品質(fairness)，且有效(efficient)提升整體系統網路效能。

摘要(英)

As a result of the rapid growth of the consumer electronics products and many services like DVB and digital channels begin broadcasting their content, receiving multimedia content through these devices anytime and anywhere becomes imperative. Furthermore, the technology of wireless access network is getting mature, therefore seeking a killer application to benefit service providers and consumers will make an impact on the next network generation. For this reason, video multicast seems to be a killer application that is attractive and has potential for development.
This study is developed on WiMAX, the PHY technique adopted is OFDMA due to the flexibility of its resource allocation. By two-dimension resource allocation and SVC(Scalable Video Coding) technique for layered coding, we refer to every receiver’’s channel condition to find each appropriate subchannel from frequency domain, and then layered video multicast from time domain to attain the proposed cross-layer multicast scheduling.
The proposed scheme achieves the objective that it takes cross-layer information into account, to minimize the resource usage according to every receiver’’s channel condition, to guarantee fairness of video quality of every receivers and to increase the throughput efficiently.

關鍵字(中)

★ WiMAX
★ 網路電視
★ 群播
★ 排程
★ OFDMA

關鍵字(英)

★ WiMAX
★ OFDMA
★ Scheduling
★ Multicast
★ IPTV

論文目次

摘要 i
Abstract ii
誌謝 iii
目錄 iv
圖目錄 vi
表目錄 ix
一、緒論 1
1-1 前言 1
1-2 研究動機 2
1-3 論文架構 3
二、相關研究背景 5
2-1 IEEE 802.16介紹 5
2-2 IEEE 802.16 OFDMA PHY 6
2-3 Multicast and Broadcast Service (MBS) 12
2-4 過往群播資源分配介紹 15
三、跨層群播資源分配 18
3-1 系統架構介紹 18
3-2 子通道分配機制 20
3-2-1 競標比價概念 20
3-2-2 自定義MCS(Modulation Coding Scheme)門檻分配 21
3-2-3 總和最大MCS(Modulation Coding Scheme)分配 27
3-3 影像分層群播機制 30
四、模擬環境與結果分析 34
4-1 模擬環境介紹 34
4-2 模擬結果分析 35
4-2-1 不同子通道分配機制搭配影像群播資源機制之比較 35
4-2-2 整體通道狀況差時系統表現 42
4-2-3 與BUF子通道分配機制比較 46
五、結論與未來研究 49
參考文獻 50

參考文獻

[1] P802.16Rev2/D8, ” DRAFT Standard for Local and metropolitan area networks Part 16: Air Interface for Broadband Wireless Access Systems” Dec. 2008
[2] J. She, F. Hou, P. H. Ho, and L. L. Xie, “IPTV over WiMAX: Key Success Factors, Challenges, and Solutions”, IEEE Communication Magazine, Vol. 45, No. 8, pp. 87-93, Aug. 2007
[3] Y. Xiao, X. Du, J. Zhang, F. Hu and S. Guizani, “Internet Protocol Television (IPTV):The Killer Application for the Next-Generation Internet”, IEEE Communication Magazine, Vol. 45, No. 11, pp. 126-134, Nov. 2007
[4] H. Schwarz, D. Marpe, and T. Wiegand, “Overview of the Scalable Video Coding Extension of the H.264/AVC Standard”, Circuits and Systems for Video Technology, IEEE Transactions on, Vol. 17, No. 9, pp. 1103-1120, Sept. 2007
[5]“Mobile WiMAX - Part I: A technical overview and performance evaluation”, WiMAX Forum, Aug. 2006
[6] T.C. Alen, A.S. Madhukumar, and F. Chin, “Capacity enhancement of a multi-user OFDM system using dynamic frequency allocation”, IEEE Transaction on Broadcasting, Vol. 49, No. 4, pp. 344-353, Dec. 2003
[7] IEEE 802.16-01/58r1, “The 802.16 WirelessMAN. MAC: It's Done, but What is it?”, Nov. 2001
[8] J. Wang, M. Venkatachalam and Y. Fang “System Architecture and Cross-Layer Optimization of Video Broadcast over WiMAX”, IEEE Journal on Selected Areas in Communications, Vol. 25, No. 4, pp. 712-721, May. 2007
[9] IEEE C802.16maint-08/274, “MBS logical channel clarification”, J. Chou, IEEE 802.16's Maintenance Task Group, pp. 1-5, July 2008
[10] W. H. Kuo, T. Liu and W. Laio, “Utility-Based Resource Allocation for Layer-Encoded IPTV Multicast in IEEE 802.16 (WiMAX) Wireless Networks”, Communications IEEE International Conference on, pp. 1754-1759, June 2007
[11] R. G. Cheng, W. J. Wang and C. L. Chu, “Dynamic Rate Adjustment (DRA) Algorithm for WiMAX Systems Supporting Multicast Video Services”, Lecture Notes in Computer Science, pp. 379-388, 2007
[12] H. Y. Chi, C. W. Lin, Y. C. Chen and C. M. Chen, “Optimal Rate Allocation for Scalable Video Multicast over WiMAX”, Circuits and Systems, ISCAS IEEE International Symposium on, pp. 1838-1841, May 2008
[13] S. Han and Y. Han, “A Competitive Fair Subchannel Allocation for OFDMA System Using an Auction Algorithm”, IEEE Vehicular Technology Conference, VTC, pp. 1787-1791, Oct. 2007
[14] J. Oh, S. Han and Y. Han, “Efficient and Fair Subchannel Allocation Based on Auction Algorithm” Personal, Indoor and Mobile Radio Communications, PIMRC IEEE 19th International Symposium on., pp. 1-5, Sept. 2008
[15] H. Yaghoobi, “Scalable OFDMA Physical Layer in IEEE 802.16 WirelessMAN”, Intel Technology Journal, Vol. 8, No. 3, pp. 200-212, Aug. 2004
[16] Y. B. Yu, “A Cross-Layer Scheduling Design for Uplink in 802.16 Network”, June 2008

指導教授

曾黎明、陳彥文
(Li-ming Tseng、Yen-wen Chen)

審核日期

2009-7-22

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