車載網路為有前景的無線通訊技術，為了能夠提供安全性應用與娛樂 資訊的傳送。先前研究中，例如C-MAC，他們提出協調式多通道媒體存取 控制通訊規約的作法。他們能保證安全訊息的傳送，但是在提出請求與回 應時，仍然透過競爭的方式，且辨識過程有浪費的可能。為了改善這些缺 點，在這篇論文裡我們提出：作法一為有辨識過程、作法二為沒有辨識過 程。在我們的作法上路邊基地扮演重要的角色，可以協調安全訊息的傳送 及車輛的請求與回應。在我們的作法中可以確保免碰撞的安全訊息以及免 競爭的方式提出請求與回應。透過實驗結果顯示，在我們提出的作法中，可 以找到兩作法的切換點；實驗結果也顯示，在傳送資料區間的長度上以及 吞吐量上我們的作法下都會比C-MAC 要好。在未來的工作上，我們會進一 步的去比較資料傳送的延遲，以及為我們作法的資料做傳送排程。
附 錄 一
𝑇 短訊框間隔長度
𝑅 路邊基地台涵蓋範圍
VANET Vehicular ad-hoc network ITS Intelligent Transportation Systems RSU Road-side unit, RSU
OBU On-board unit I2V Infrastructure-to-vehicle V2V Vehicle-to-vehicle
WAVE Wireless Access in Vehicular Environments
CCH Control Channel SCHs Service Channels,
FCC Federal Communications Commission IoV Internet of Vehicle
C-MAC Coordinated Multichannel MAC IS Initiate State
TCH Temp cluster head
CH Cluster head
CM Cluster member BST Base Station Transceiver
IN Initial
SE State Election ISO-CH Isolated Cluster Head
BSM Basic Safety Message
LIBP Length Information Broadcast Phase SMP Safety Message Phase
CRP Channel Reservation Phase LI Length Information
REQ Request
RES Response
RC RSU Coordination
CS Control Slot
AIFS Arbitration Inter-Frame Space SIFSs Short Inter-Frame Spaces
參 考 文 獻
[1] M. Wang, H. Liang, R. Zhang, R. Deng, and X. Shen, “Mobility-Aware Coordinated Charging for Electric Vehicles in VANET-Enhanced Smart Grid,” IEEE J. Sel. Areas Commun, vol. 32, no. 7, pp. 1344 - 1360, June.
2014.
[2] F. I. Shaikh, and H. A. Hingoliwala, “Path Planning based QoS Routing in VANET,” 2017 International Conference on Big Data, IoT and Data Science (BID), pp. 37 - 44, June. 2017.
[3] M. Wang, H. Shan, R. Lu, R. Zhang, X. Shen, and F. Bai, “Real-Time Path Planning Based on Hybrid-VANET-Enhanced Transportation System,” IEEE Trans. Veh. Technol, vol. 64, no.5, pp. 1664 - 1678, July. 2014.
[4] N. Wisitpongphan, F. Bai, P. Mudalige, V. Sadekar, and Ozan Tonguz,
“Routing in Sparse Vehicular Ad Hoc Wireless Networks,” IEEE J. Sel.
Areas Commun, vol. 25, no. 8, pp. 1538 - 1556, October. 2007.
[5] L. Zhu, C. Li, B. Li, X. Wang, and G. Mao, “Geographic Routing in Multilevel Scenarios of Vehicular Ad Hoc Networks,” IEEE Trans. Veh.
Technol, vol. 65, no.9, pp. 7740 - 7753, September. 2016.
[6] J.-J. Huang, “Accurate Probability Distribution of Rehealing Delay in Sparse VANETs,” IEEE Communications Letter, vol. 19, no. 7, pp. 1193-1196, July.
2015.
[7] K. Liu, J.-Y. Ng, V. C. S. Lee, S. H. Son, and I. Stojmenovic, “Cooperative Data Scheduling in Hybrid Vehicular Ad Hoc Networks: VANET as a Software Defined Network,” IEEE/ACM Trans. Net, vol. 24, no. 3, pp. 1759 - 1773, June. 2016.
[8] A. A. Almohammedi, N. K. Noordin, A. Sali, F. Hashim, and M. Balfaqih,
“An Adaptive Multi-Channel Assignment and Coordination Scheme for IEEE 802.11P/1609.4 in Vehicular Ad-Hoc Networks,” IEEE Access, vol. 6, pp. 2781 - 2802, December. 2017.
[9] Ns-3 Model Library. [Online]. Available at: https://goo.gl/S3uvoD.
[10] H. Yoo, and D. Kim, “Dynamic Channel Coordination Schemes for IEEE 802.11p/1609 Vehicular Networks: A Survey,” International Journal of Distributed Sensor Networks, vol. 9, no. 10, pp. 1-8, October. 2013.
[11] Y. Liu, L.F. Liu, L. Zheng, and H.F. Wang, “Study on the Downlink Performance of Roadside Unit in Vehicular Ad-Hoc Networks,” Journal of Software, vol. 26, no. 7, pp. 1700-1710, 2015.
[12] A. Benslimane, T. Taleb, and R. Sivaraj, “Dynamic Clustering-Based Adaptive Mobile Gateway Management in Integrated VANET — 3G Heterogeneous Wireless Networks,” IEEE J. Sel. Areas Commun., vol. 29, no. 3, pp. 559 - 570, March 2011.
[13] S. Ucar, S. C. Ergen, and O. Ozkasap, “Multihop-Cluster-Based IEEE 802.11p and LTE Hybrid Architecture for VANET Safety Message Dissemination,” IEEE Trans. Veh. Technol., vol. 65, no. 4, pp. 2621 - 2636, April. 2016.
[14] Q. Wang, S. Leng, H. Fu, and Y. Zhang, “An IEEE 802.11p-Based Multichannel MAC Scheme With Channel Coordination for Vehicular Ad Hoc Networks,” IEEE Transactions on Intelligent Transportation Systems., vol.13, no. 2, pp. 449 - 458, June. 2012.
[15] H. A. Omar, W. Zhuang, and L. Li, “VeMAC: A TDMA-Based MAC Protocol for Reliable Broadcast in VANETs,” IEEE Transactions on Mobile Computing., vol.12, no. 9, pp. 1724 - 1736, September. 2013.
[16] W. Guo, L. Huang, L. Chen, H. Xu, and J. Xie, “An Adaptive Collision- Free MAC protocol based on TDMA for Inter-Vehicular communication,”
Wireless Communications & Signal Processing (WCSP)., pp.1-6, October.
2012.
[17] Z. Tang, J. Wang, S. Song, P. Yang, and Y. Zhang, “A Cluster-Based Multichannel MAC Protocol for throughput sensitive applications in VANETs,” Anti-counterfeiting, Security, and Identification (ASID)., pp.19-23, September. 2015.
[18] Y. Kim, M. Lee, and T.-J. Lee, “Coordinated Multichannel MAC Protocol for Vehicular Ad Hoc Networks,” IEEE Trans. Veh. Technol., vol. 65, no. 8, pp. 6508 - 6517, August. 2016.
[19] MAC Layer: IEEE802.11p. [Online]. Available at: https://goo.gl/HbE7C4.
自 傳
一、 生長背景
我出生在新北市，家中成員有媽媽、爸爸、弟弟和我。從小到大我的 家人都是非常支持我。媽媽以前曾經對我說過笨鳥慢飛的故事。如果沒有 比別人聰明，就要多努力點追上別人的腳步。這個故事對我的影響很大，
每當我覺得自己做不了，那我就按照自己的腳步慢慢學習，努力的追上別 人。
二、 求學過程
在高中階段我就讀的是技職體系的學校，所以在高中時期就已經選擇 了未來的系所。要非常感謝高中遇到的老師，國中時對物理一竅不通的我，
但資訊科學的內容卻與物理息息相關，若不是這些老師耐心教導，或許這 一條路對我來說會是非常艱辛。
大學階段，由於高中打下電子學與基本電學的基礎，讓我在學科方面能 夠有比較好的學習成效。術科方面，也開始接觸了一些程式設計的部分，雖 然沒有很專精，卻也找到些許的興趣。
研究所階段確實與之前求學過程差別很大，起初我非常不適應，跟著指 導教授的安排，學習到了很多東西，透過老師的訓練，慢慢地開始有獨立思 考問題的能力，也慢慢地具備了研究生的特質。
學 術 研 究
[1] J.-J. Huang, and P.-W. Wang, “Analysis of Rehealing Delay for the Delivery of Downstream Messages in Sparse Highway Vehicular Ad Hoc Networks,”
International Journal Of Electrical Engineering., December. 2018.