| 姓名 |
吳明達(Ming-Ta Wu)
查詢紙本館藏 |
畢業系所 |
通訊工程學系在職專班 |
| 論文名稱 |
整合休眠模式與空閒模式之WiMax行動網路效能研究
(To Integrate Sleep Mode and Idle Mode for Improving WiMax Moble Network Performance)
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| 相關論文 | |
| 檔案 |
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| 摘要(中) |
本論文主要在探討WiMAX的行動節點(Mobile Station, MS)在已經進入休眠模式(Sleep mode)的狀態下,處於休眠週期(sleep window)的期間,逐漸離開原本serving WiMAX基地台(Base Station, BS)的信號範圍,移動至另外一個BS的信號範圍,原本serving BS有資料要傳給MS,會因為只有原本serving BS本身知道有資料要傳給MS,在無法叫醒該MS的狀況,新的BS又不知道有資料要傳給MS,就會發生封包遺失(Packet loss).
所以本論文提出MS還在Sleep mode,整合空閒模式(Idle mode),我們建議當MS發現原本serving BS的信號已經逐漸微弱,且原本serving BS沒有資料要給該MS時,不直接進行換手(Handover),而改變為MS直接進入idle mode,其優點為可以省去handover的流程,且handover的進行必須回到正常運作的狀況,讓MS進入sleep mode可以省電的好處失去,且MS在idle mode下,因為傳呼群組(paging group)的範圍比BS的服務範圍要大上許多,便不會有MS換至另外一個BS所造成packet loss產生,但是因為Idle mode的傳呼無用期間(paging unavilable interval)比sleep window長很多,所以會造成封包有很長的延遲.
我們會針對本論文所提出的MS sleep mode整合idle mode的方式,與原本單純的sleep mode,模擬在不同的BS packet buffer、不同的流量packet發送情況下和MS的移動頻繁率,來觀察packet的loss rate與delay狀況,且進行分析與比較,整合idle mode比單純sleep mode在packet loss改善很多,不過也packet delay也增加很多.所以此方式很適合NRT、BE的應用,尤其是當MS移動率高的時,整合idle mode的packet loss 的改善更具效果.
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| 摘要(英) |
This paper discusses the phenomenon of Mobile Station(MS) in WiMAX network when it handovers during sleeping period , We suggested that when the serving BS signal is becoming weak gradually, the serving BS will inform the MS at its listening frame, to enter idle mode if BS does not have packet to transmit to this MS at that moment. The proposed approach simplifies the handover procedure of MS when it is in sleeping mode and can prevent MS losses connection when it moves out the original serving BS during sleeping period. Generally, in idle mode, the paging coverage is much wider than a single BS , and the paging interval could much longer than the sleeping interval.
Thus, the MS with non real time (NRT) or best effort services can save power when it enters idle mode. The data forwarding from the original serving BS to current BS is adopted when the MS wakes up to receive paging information and is informed for receiving data. However, additional delay is introduced during data forwarding. This research investigates the performance of packet loss, delay, and sleeping efficiency of the proposed scheme through exhaustive simulations. The simulation results show that the proposed integrated sleep/idle scheme achieves better performance than the traditional sleeping mode only scheme.
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| 關鍵字(中) |
★ IEEE 802.16
★ WiMAX
★ 空閒模式
★ 休眠模式 |
關鍵字(英) |
★ IEEE 802.16
★ WiMAX
★ Sleep mode
★ Idle mode |
| 論文目次 |
目 錄 iv
圖 目 錄 v
表 目 錄 vi
第一章 緒論 1
1.1 前言 1
1.2 研究動機 3
1.3 論文架構 4
第二章 WiMAX技術介紹 5
2.1 WiMAX MAC協定 5
2.2 換手流程 10
第三章 整合休眠模式與空閒模式的方法 15
3.1休眠模式的運作 15
3.2 空閒模式的運作 22
3.3 整合空閒模式方法 29
第四章 模擬與分析 32
4.1 模擬架構 32
4.2 Packet Buffer與Packet Loss,Packet Delay的關係 35
4.3 Packet traffic與 Packet Loss,Packet Delay的關係 38
4.4 MS的移動率與Packet Loss,Packet Delay的關係 43
第五章 結論 49
5.1 結論 49
5.2 未來研究方向 50
參考文獻 REFERENCES 51
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| 參考文獻 |
[1] IEEE Standard, “802.16-2004 Part 16: Air Interface for Fixed Broadband Wireless Access Systems,” Oct 2004.
[2]IEEE Standard, “802.16e-200 Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands,” Feb 2005.
[3] Kohei Iseda ,Tetsumei Tsuruoka,Tsuguo Kato ,“Power Consumption Control Technology in WiMAX MAC Layer” , FUJITSU Sci. Tech. 2008 July, page 256~page 163
[4] Rung-Shiang Cheng (程榮祥) “802.16 簡介” Department of Electrical Engineering, National Cheng Kung University, Taiwan 2008年
[5] 彭木根 王文博等著“下一代寬帶無線通訊系統 OFDM & WiMAX” ,機械工作出版社 2008年
[6] http://www.mem.com.tw/article_content.asp?sn=0908210015 (Aug. 2009)
[7] http://www.mem.com.tw/article_content.asp?sn=0907230012 (Jul. 2009)
[8]http://big5.ce.cn/cysc/communications/yjdt/201006/13/
t20100613_20413432shtml (Jun 2010.)
[9] http://en.wikipedia.org/wiki/IEEE_802.16 (2010, Jun.)
[10] 洪文堅,謝智強 “探索WiMAX MAC技術 採需求/答允機制實現服務分級” 新通訊雜誌 2006 年 5 月號 63 期
[11] 葉 宗 驌 “改善 WiMAX ASN Anchor Mobility 換手之研究” 中央大學資訊工程研究所, 2008年
[12] J.-B. Seo, S.-Q. Lee, N.-H. Park, H.-W. Lee, and C.-H. Cho, “Performance analysis of sleep mode operation in IEEE 802.16e” Proceedings of the IEEE VTC 2004 Fall - Vehicular Technology Conference, vol. 2, pp. 1169–1173, Los Angeles, CA, USA, Sep. 2004
[13] K. Han, S. Choi, ”Performance Analysis of Sleep Mode Operation in IEEE 802.16e Mobile Broadband Wireless Access Systems,” Proceedings of the IEEE VTC 2006 Spring - Vehicular Technology Conference, vol. 3, pp. 1141-1145, Melbourne, Australia, May 2006.
[14] Sangkyu Baek , Jung Je Son and Bong Dae Choi “PERFORMANCE ANALYSIS OF PUSH TO TALK OVER IEEE 802.16E WITH SLEEP/IDLE MODE” Department of Mathematics and TMRC, Korea University, May 2010
[15]Kong, L.; Tsang, D.H.K.; “Performance Study of Power Saving Classes of Type I and Type II in IEEE 802.16e,” Proceedings 2006 31st IEEE Conference, pp.20 – 27, Nov 2006
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| 指導教授 |
陳彥文(Yen-Wen Chen)
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審核日期 |
2010-7-25 |
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