5.1 結論
本論文針對 VANET 中，因低車輛密度而導致網路不連續性之情況做討論，
為簡化環境中其他複雜因素對延遲的影響，本論文以較單純且有固定車流方向的 快速道路為背景環境，除了持續採用過去文獻中所使用之對向車道車輛方法，來 協助訊息之傳遞，藉以縮短網路修復時間之外，更導入較準確的車輛群集長度機 率密度函數與分析方式，來計算中斷網路中的網路修復時間，模擬結果證明了本 論文之分析修正了過去研究文獻之錯誤計算結果，同時也驗證了所推測的車輛群 集長度之機率密度函數的正確性。
未來，我們除了使用雙向車道之特性，另外將使用廣泛佈署的 RSU 來加入 網路修復時間之計算，依不同功能之 RSU（即第二章所介紹之 Ad-hoc-based RSU 與 Infrastructure-based RSU）個別討論，除此之外，並可以結合以上述兩種 RSU 之混合環境分析，將以此三種不同環境做為互相比較之對象，可針對不同車輛密 度對於其可傳送之距離進行討論。由於 VANET 可提供多樣化之應用服務，而每 項服務皆有其所對應之不同的延遲限制。因此，我們將主要目標放在對於同一種 服務之延遲要求，比對各種環境之優劣，使得該服務在品質方面的研究中，提供 適合的背景環境之選擇。
參 考 文 獻
[1] S. Biswas, R. Tatchikou, and F. Dion, “Vehicle-to-Vehicle Wireless Communication Protocols for Enhancing Highway Traffic Safety,” IEEE Commun. Mag., Jun 2006, pp. 74-82.
[2] Elmar Schoch, Frank Kargl, and Michael Weber, “Communication Patterns in VANETs,” IEEE Communications Magazine, Nov. 2008, pp. 119-125.
[3] N. Wisitpongphan, F. Bai, P. Mudalige, V. Sadekar, and O. Tonguz, “Routing in Sparse Vehicular Ad Hoc Wireless Networks,” IEEE Journal on Selected Areas in Communications, vol. 25, no. 8, Oct. 2007, pp. 1538-1556.
[4] Fan Yu and Subir Biswas, “Self-Configuring TDMA Protocols for Enhancing Vehicle Safety With DSRC Based Vehicle-to-Vehicle Communications,” IEEE Journal on Selected Areas in Communications, Vol. 25, No. 8, October 2007, pp.
1526-1537.
[5] Xi Zhang, Hang Su and Hsiao-Hwa Chen, “Cluster-Based Multi-Channel Communications Protocols in Vehicle Ad Hoc Networks,” IEEE Wireless Communications, Oct. 2006, pp. 44-51.
[6] Ahmed Ahizoune, Abdelhakim Hafid and Racha Ben Ali, “A Contention-Free Broadcast Protocol for Periodic Safety Messages in Vehicular Ad-Hoc Networks,”
IEEE 35thConference on Local Computer Networks (LCN), 2010,pp. 48-55.
[7] N. Wisitpongphan, O. K. Tonguz, J. S. Parikh, P. Mudalide, F. Bai, and V. Sadekar,
“Broadcast Storm Mitigation Techniques In Vehicular Ad Hoc Networks,” IEEE Wireless Communications, December 2007, pp. 84-94.
[8] Flaminio Borgonovo, Antonio Capone, Matteo Cesana, and Luigi Fratta, “ADHOC MAC: A New MAC Architecture for Ad Hoc Networks Providing Efficient and
Reliable Point-to-Point and Broadcast Services,” Wireless Networks, Vol. 10, No. 4, July 2004, pp. 359-366.
[9] Jeng-Ji Huang, Hung-Hsiang Ko, Wei-Keng Lin, and Wun-Ci Su, “A Hybrid Channel Allocation Scheme for Cluster-Based Multi-Channel Communication Protocols in Vehicle Ad Hoc Networks,” 2011 Conference on Electronic Communication and Applications, 國立高雄應用科技大學。
[10] Abderrahim Benslimane, Tarik Taleb, and Rajarajan Sivaraj, “Dynamic Clustering-Based Adaptive Mobile Gateway Management in Integrated VANET-3G Heterogeneous Wireless Networks,” IEEE Journal on Selected Areas in Communications, vol. 29, No. 3, Mar. 2011, pp. 559-570.
[11]羅乃維、陳首宏、張峰旗，“電腦網路遊戲外掛偵測機制及處理流程之研 究＂，第17屆全國資訊安全會議，2007年6月。
[12] Josiane Nzouonta, Neeraj Rajgure, Guiling Wang, and Cristian Borcea, “Routing on City Roads using Real-Time Vehicular Traffic Information,” IEEE Transactions on Vehicular Technology, vol. 58, No. 7, Sep. 2009, pp. 3609-3626.
[13] Wenping Chen, Sencun Zhu, and Deying Li, “VAN:Vehicle-Assisted Shortest-Time Path Navigation,” 2010 IEEE 7th International Conference on Mobile Adhoc and Sensor Systems, Nov. 2010, pp. 442-451.
[14] Mingliu Zhang, and Richard S. Wolff, “Routing Protocols for Vehicular Ad Hoc Networks in Rural Areas,” IEEE Communications Magazine, vol. 46, No. 11, Nov.
2008, pp. 126-131.
[15] Wai Chen and Shengwei Cai, “Ad Hoc Peer-to-Peer Network Architecture for Vehicle Safety Communications,” IEEE Communications Magazine, vol. 43, No. 4, April 2005, pp. 100-107.
[16] Y. Qian, K. Lu, M. N, “A Secure VANET MAC Protocol for DSRC Applications,”
IEEE Globecom., Dec. 2008, pp. 1-5.
[17] IEEE Std 1609.3, “IEEE Trial-Use Standard for Wireless Access in Vehicular Environments (WAVE) - Networking Services,” April. 2007, pp. c1-87.
[18] 李夏新，“北美車載資通標準-WAVE/DSRC＂，電工通訊季刊，pp.46-49，2008 年第三季，2008年9月。
[19] Josiane Nzouonta, Neeraj Rajgure, Guiling Wang, and Cristian Borcea, “VANET Routing on City Roads Using Real-Time Vehicular Traffic Information,” IEEE Transactions on vehicular technology, vol. 58, No. 7, Sep. 2009, pp. 3609-3626.