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姓名 王崇峻(Chung-Chun Wang) 查詢紙本館藏 畢業系所 通訊工程學系 論文名稱 車載網路中以資料匯集技術改善傳輸效能之封包傳送機制
(Using Data Aggregation Techniques for Performance Improvement of Data Packet Transmissions in Vehicular Networks)相關論文 檔案 [Endnote RIS 格式] [Bibtex 格式] [相關文章] [文章引用] [完整記錄] [館藏目錄] [檢視] [下載]
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摘要(中) 在車載網路中,因為車輛之間會競爭頻道,導致IEEE 802.11p技術遭受較低的資傳輸吞吐量和系統效率,特別是在交通擁塞的情況下。為了減輕此問題,本論文提出一套應用於車載網路中,結合資料匯集方法的資料傳輸機制。本機制利用一些中繼車輛分散地執行封包合併和分離的方法對抗網路中變動的封包流量,維持傳輸的效率。在效能驗證顯示,相較於原始的IEEE 802.11p機制,此方法基於中繼車輛的資料匯集技術能夠在車輛和基地台之間的通訊,達到較低的碰撞機率、較小的封包重傳次數、較高的資料吞吐量、較高的封包成功率、較高的頻寬使用率和較短的封包延遲時間。 摘要(英) On account of media access competition among vehicles in vehicular ad hoc networks, a vehicular network system based on IEEE 802.11p technologies can still suffer from a serious degradation of transmission throughput and system efficiency, especially when the traffic falls in crowded road conditions. To mitigate this problem, thisvera{thesis}proposes a new data delivery mechanism which incorporates the functionality of data aggregation with conventional vehicular communications. The proposed mechanism can employ some vehicular relays to perform packet fusion and diffusion in a distributed manner to maintain transmission efficiency against varying traffic load in a network. Performance examination shows that as compared with the ordinary IEEE 802.11p scheme, this relay-based data aggregation mechanism is able to achieve a lower collision probability, a smaller number of retransmission times, higher data throughput, higher transmission successful rate, higher throughput utilization, and shorter delay time between vehicle-to-infrastructure communications in vehicular networks. 關鍵字(中) ★ 車載網路
★ 資料匯集
★ 車輛與基地台通訊
★ 效能改善關鍵字(英) ★ Vehicular Networks
★ Data aggregation
★ V2I communications
★ Performance Improvement論文目次 Contents
1 Introduction (1)
2 System Model and Problem Statement (4)
3 Relay based Data Aggregation (7)
3.1 Design Abstraction (7)
3.2 Functional Design (8)
4 Simulation and Discussion (11)
4.1 Simulation Environment (11)
4.2 Collision Probability (14)
4.3 Average Retransmission Times (17)
4.4 Transmission Successful Rate (19)
4.5 Throughput and oered load (21)
4.6 Delay (23)
4.7 Small Packet Transmissions (26)
4.7.1 Transmission Delay (26)
4.7.2 Transmission Delay Ratio (27)
4.7.3 Delay (28)
4.7.4 Transmission Successful rate (29)
5 Conclusion (31)
6 Bibliography (32)參考文獻 [1] R. A. Uzcategui and G. Acosta-Marum, "WAVE: A tutorial," IEEE Communications Magazine, vol. 47, no. 5, pp. 126-133, May 2009.
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[12] F. J. Ros, P. M. Ruiz, , and I. Stojmenovic, "Acknowledgment-based broadcast protocol for reliable and e_cient data dissemination in vehicular ad hoc networks," IEEE Transactions on Mobile Computing, vol. 11, no. 1, pp. 33-46, 2012.
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[14] The network simulator (NS-2). [Online]. Available: http://www.isi.edu/nsnam/ns/index.html
[15] J. Hrri, M. Fiore, F. Filali, and C. Bonnet, "Vanetmobisim: generating realistic mobility patterns for vanets," in Proc. of the 3rd ACM International Workshop on Vehicular Ad Hoc Networks (VANET’06), 2006.指導教授 胡誌麟(Chih-Lin Hu) 審核日期 2013-8-27 推文 facebook plurk twitter funp google live udn HD myshare reddit netvibes friend youpush delicious baidu 網路書籤 Google bookmarks del.icio.us hemidemi myshare