博碩士論文 955202028 詳細資訊




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姓名 鍾承宇(Cheng-yu Chung)  查詢紙本館藏   畢業系所 資訊工程學系
論文名稱 利用車用無線網路尋找空停車位之協定
(Parking Space Discovery System in Vehicular Ad hoc Networks)
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摘要(中) 在都市環境中,尋找停車位一直是個令駕駛人相當困擾的問題。在車用無線網路出現後,這個問題的解決方法便多了一個思考的方向。利用裝設在停車收費器(parking meter)和車輛上的網路裝置形成的車用無線網路,可以將空停車位的資訊散播出去。在這篇論文中,我們提出了一個以廣播為基礎的通訊協定,能夠以較少的封包傳輸量,達成讓駕駛人得到可接受的資訊量和精確度。在我們的方法中使用了許多技巧,例如輪流廣播機制、離散餘弦轉換(DCT)、判斷封包的品質好壞並減少較差的封包和依空停車位的數量動態調整廣播週期和TTL等,都有助於減少通信開銷(communication overhead)並維持資訊可得性和正確率。在模擬的結果中顯示,我們所提出的方法比過去的方法有更高的適應性和資訊散播的效率。
摘要(英) Looking for parking spaces is usually a serious problem in urban cities. In order to reduce the time for seeking parking spaces and save the fuel, the parking spaces finding schemes become an important research issue in vehicular ad hoc networks (VANETs). Using the embedded wireless devices on parking meters and vehicles, the parking spaces information can be spread in the VANETs. With the help of this information, drivers will not have to waste a lot of time for finding parking spaces. In this article, we propose a distributed scheme to discover the parking spaces efficiently. Our scheme is based on a hierarchical structure to transmit parking spaces information to other parking meters in the VANETs. According to the characteristic that drivers are interested in detail parking spaces information nearby the destination but just have to know rough information about parking spaces in a distant place. We use discrete cosine transform to convert parking spaces information to a rough spatial distribution and have less data size to be able to transfer in VANETs and cost less overhead. The simulation results show that the availability and accuracy of parking spaces information is high in nearby region and slightly lower in distant place. The communication overhead of our scheme is lower than previous work.
關鍵字(中) ★ 車用無線網路
★ 尋找停車位
★ 資料散佈
關鍵字(英) ★ Information dissemination
★ parking space
★ vehicular ad hoc networks
論文目次 Chapter 1 Introduction……………………………………1
Chapter 2 Related Works……………………………………4
Chapter 3 Parking Spaces Dissemination Scheme………7
Chapter 4 Performance Evaluation………………………25
Chapter 5 Conclusions……………………………………33
References……………………………………………………34
參考文獻 [1] The ns-2 network simulator. http://www.isi.edu/nsnam/ns/
[2] The VanetMobiSim traffic simulator. http://vanet.eurecom.fr/
[3] “Statistical Weekly Report on Municipal Administration,” Department of Budget, Accounting and Statistics, Taipei City Government (December 19, 2007)
http://w2.dbas.taipei.gov.tw/news_weekly/S4_2/96442.htm
[4] “Can't Find a Parking Spot? Check Smartphone,” The New York Times, July 2008. http://www.nytimes.com/2008/07/12/business/12newpark.html
[5] P. Basu and T. Little, “Networked Parking Spaces: Architecture and Applications,” Proceedings of the 56th IEEE Vehicular Technology Conference, vol. 2, pp. 1153-1157, Vancouver, Canada, September 2002.
[6] O. Brickley, C. Shen, M. Klepal, A. Tabatabaei, D. Pesch, “A Data Dissemination Strategy for Cooperative Vehicular Systems,” Proceedings of IEEE Vehicular Technology Conference, pp. 2501-2505, April 2007.
[7] M. Caliskan, D. Graupner, and M. Mauve, “Decentralized Discovery of Free Parking Places,” Proceedings of the third ACM International Workshop on Vehicular Ad Hoc Networks, pp. 30-39, Los Angeles, CA, USA, September 2006.
[8] M. Caliskan, A. Barthels, B. Scheuermann, and M. Mauve, “Predicting Parking Lot Occupancy in Vehicular Ad Hoc Networks,” Proceedings of the 65th IEEE Vehicular Technology Conference, pp.277-281, Dublin, Ireland, April 2007.
[9] P. Gibbons, B. Karp, Y. Ke, S. Nath, and S. Seshan, “IrisNet: An Architecture for a Worldwide Sensor Web,” IEEE Pervasive Computing, vol. 2, no. 4, pp. 22-33, 2003.
[10] M. J. Handy, M. Haase, D. Timmermann, “Low Energy Adaptive Clustering Hierarchy with Deterministic Cluster-head Selection,” Proceedings of the Fourth International Workshop on Mobile and Wireless Communications Network, pp. 368-372, Stockholm, Sweden, September 2002.
[11] P. Heckbert, "Color Image Quantization for Frame Buffer Display," Proceedings of the 9th Annual Conference on Computer Graphics and Interactive Techniques, pp. 297-307, Boston, Massachusetts, United States, July, 1982.
[12] W. R. Heinzelman, A. Chandrakasan, H. Balakrishnan, “Energy-efficient Communication Protocol for Wireless Microsensor Networks,” Proceedings of the 33rd Hawaii International Conference on System Sciences, vol. 2, pp. 1-10, Hawaii, United States, January 2000.
[13] C. Lochert, B. Scheuermann, and M. Mauve, “Probabilistic Aggregation for Data Dissemination in VANETs,” Proceedings of the Fourth ACM International Workshop on Vehicular Ad Hoc Networks, pp. 1-8, Montreal, Quebec, Canada, September 2007.
[14] R. Panayappan, J. Trivedi, A. Studer, and A. Perrig, “VANET-based Approach for Parking Space Availability,” Proceedings of the Fourth ACM International Workshop on Vehicular Ad Hoc Networks, pp. 75-76, Montreal, Quebec, Canada, September 2007.
[15] G. Wallace, “The JPEG Still Picture Compression Standard,” IEEE Transactions on Consumer Electronics, vol. 38, no. 1, pp. xviii-xxxiv, February 1992.
[16] Q. Xu, T. Mak, J. Ko, and R. Sengupta, “Vehicle-to-vehicle Messaging in DSRC,” Proceedings of ACM Vehicular Ad Hoc Networks, pp. 19-28, October 2004.
指導教授 許健平、張貴雲
(Jang-ping Sheu、Guey-yun Chang)
審核日期 2008-10-9
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