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研究生:官聲翔
研究生(外文):Kuan, Sheng-Hsiang
論文名稱:IEEE 802.11ah無線隨意網路模式建構及GradPC演算法實作之效能分析
論文名稱(外文):IEEE 802.11ah adhoc mode construction and performance analysis of GradPC algorithm implementation
指導教授:林亭佑林亭佑引用關係
指導教授(外文):Lin, Ting-Yu
口試委員:林亭佑李程輝張薰文
口試委員(外文):Lin, Ting-YuLee, Tsern-HueiChang, Hsun-Wen
口試日期:2021-09-01
學位類別:碩士
校院名稱:國立陽明交通大學
系所名稱:電信工程研究所
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:2021
畢業學年度:110
語文別:中文
論文頁數:46
中文關鍵詞:無線隨意網路IEEE 802.11ah功率控制多跳路徑物聯網
外文關鍵詞:adhocIEEE 802.11ahpower controlmulti-hop routingIoT
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作為對IEEE 802.11無線網路技術的修訂,在Sub-1GHz運作的新興低功率、長距離802.11ah標準(WiFi HaLow)具有在物聯網(IoT)應用市場中發展成為有力競爭者的潛力,考慮到在大量物聯網裝置的環境中已分散式網路(adhoc)進行傳輸是較佳的選擇,如何規劃傳輸與在每條傳輸上達到滿意的Troughput表現成為一個關鍵性的議題,由於IEEE 802.11ah是一個相對低速率的無線系統,其性能對於媒體存取(medium access)與多跳路徑的影響皆較為敏感。
本篇論文中,我們的貢獻是雙重的,首先我們藉由破解了NS3網路模擬器的程式碼,成功的使其能夠支援IEEE 802.11ah的無線隨意網路模式,這是目前NS3官方模組中所欠缺的,其次,我們研究如何在媒體利用率(medium utilization)與多跳路徑上取得平衡以提高802.11ah的系統效能,藉由我們之前在802.11b上提出的GradPC功率控制及G-mcDSR多通道路由協定,我們進一步實現了這些機制,並在不同的IEEE 802.11ah無線隨意網路模式的環境下分析各種性能的表現以及驗證本篇論文做法的有效性。
As an amendment to the IEEE 802.11 wireless networking technology, the emerging low-power long-range 802.11ah standard (WiFi HaLow) operating in sub-1GHz has great potential to develop into a promising competitor for the enormous Internet of Things (IoT) applications market. Considering vast numbers of connected IoT devices communicating preferably in distributed (adhoc) manners, how to schedule traffic flows and achieve decent per-flow throughputs becomes a crucial performance issue. Since the IEEE 802.11ah is a relatively low-rate wireless system, its performance is sensitive to both medium access and multi-hop routing mechanisms.

In this thesis, our contributions are twofold. First, we hacked the NS3 simulation code and successfully modified the simulator to support IEEE 802.11ah adhoc communication mode, which the current official released NS3 kernel lacks. The modified kernel has been carefully verified to produce reliable simulation data. Second, we investigate how to balance between medium utilization and multi-hop route length so as to improve 802.11ah system performance. Based on our previously proposed 802.11b GradPC power control and G-mcDSR multi-channel routing protocols, we further implement these mechanisms and analyze various performance aspects under different simulated IEEE 802.11ah adhoc environments to validate our algorithmic effectiveness.
誌 謝 i
摘 要 ii
目 錄 v
表 目 錄 vii
圖 目 錄 viii
一、緒論 1
二、IEEE 802.11ah與研究背景 3
2.1 IEEE 802.11 ah 3
2.2 無線隨意網路 3
2.3 GradPC 4
2.3.1 GradPC-I 7
2.3.2 GradPC-II 8
2.3.3 GradPC-III 8
2.4 G-mcDSR 9
2.5 本篇論文貢獻 10
三、研究方法 12
3.1 IEEE 802.11 ah無線隨意網路模式 12
3.2 驗證IEEE 802.11 ah無線隨意網路模式之可靠性 15
3.2.1 IEEE 802.11ah傳輸距離 15
3.2.2 Hidden Terminal問題 17
3.2.3 多跳路徑之AODV傳輸 20
3.3 GradPC實現 23
3.3.1 多通道之實現 23
3.3.2 GradPC演算法 24
3.3.3 G-mcDSR 26
3.3.4 結果監測機制 27
四、模擬結果與效能分析 28
4.1 傳輸設定 28
4.2 Grid型拓樸 29
4.2.1 Grid型拓樸模擬結果 34
4.3 隨機灑點型拓樸 37
4.3.1 隨機灑點型拓樸模擬結果 38
五、結論 43
六、未來工作 44
參 考 文 獻 45
[1] Le Tian, Amina Sljivo, Serena Santi, Eli De Poorter, Jeroen Hoebeke, Jeroen Famaey. Extension of the IEEE 802.11ah NS-3 Simulation Module. Workshop on ns-3 (WNS3), 2018..
[2] F. Rebecchi, M. D. de Amorim, and V. Conan. Data Offloading Techniques in Cellular Networks: A Survey. IEEE Communication Surveys and Tutorials, 17(2):580–603, May 2015.
[3] D.M. Blough,M. Leoncini, G. Resta, and P. Santi. The k-Neighbors Approach to Interference Bounded and Symmetric Topology Control in Ad Hoc Networks. IEEE Transactions on Mobile Computing, 5(9):1267–1282, 2006.
[4] P. Gupta and P. R. Kumar. Critical Power for Asymptotic Connectivity in Wireless Networks. Stochastic Analysis, Control, Optimiza- tion and Applications, 1998.
[5] A. Muqattash and M. Krunz. Power Controlled Dual Channel (PCDC) Medium Access Protocol for Wireless Ad Hoc Networks. In Proc. IEEE INFOCOM, 2003.
[6] Y.-C. Tseng, S.-L. Wu, C.-Y. Lin, and J.-P. Sheu. A Multi-channel MAC Protocol with Power Control for Multi-hop Mobile Ad Hoc Networks. In Proc. IEEE Int’l Conference on Distributed Computing Systems (ICDCS), pages 419–424, 2001.
[7] F. Xue and P. R. Kumar. The Number of Neighbors Needed for Connectivity of Wireless Networks. Wireless Networks, 10:169–181, 2004.
[8] A. Akella, G. Judd, S. Seshan, and P. Steenkiste. Self Management in Chaotic Wireless Deployments. In Proc. ACM MobiCom, 2005.
[9] X. Guo, S. Roy, andW. S. Conner. Spatial Reuse inWireless Ad-hoc Networks. In Proc. IEEE VTC, 2003.
[10] T.-S. Kim, H. Lim, and J. C. Hou. Improving Spatial Reuse through Tuning Transmit Power, Carrier Sense Threshold, and Data Rate in Multihop Wireless Networks. In Proc. ACM MobiCom, September 2006.
[11] T.-Y. Lin and J. C. Hou. Interplay of Spatial Reuse and SINRdetermined Data Rates in CSMA/CA-based,Multi-hop,Multi-rate Wireless Networks. In Proc. IEEE INFOCOM, 2007.
[12] D. B. Johnson, Y.-C. Hu, and D. A. Maltz. The Dynamic Source Routing Protocol (DSR) for Mobile Ad Hoc Wireless Networks for IPv4. IETF RFC 4728, 2007.
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