在現代的生活中雖然無線網路已經被大量且廣泛的應用，但是在車輛與車輛之間仍缺乏一個良好的無線通訊方式，目前只能透過行動通訊的方式來處理，而行動通訊網路在高速移動的情況之下傳輸仍然會有多次的中斷且效率不佳。儘管 IEEE 提出了 802.11p 標準，也出現了大量相關的討論，但是對於如何有效的處理傳輸中的資料仍無一個有效的解決方案。

有鑑於此，本論文針對車用網路中的資料傳輸提出了一個符合 IEEE 802.11p 標準之基於訊號強度的方法設計，此方法有反應迅速且高效率的特性，可以在必要的情況之下，及時將重要的資料傳遞到正確的接收端做進一步的處理。

Although now in our life wireless internet has been applied wildly, betweens cars we still lack a good wireless communication. So far we can only deal with this problem by using mobile ad hoc network. But while mobile ad hoc network is used under high mobility circumstances, transmission is frequently disconnected and ineffective. IEEE has brought up the 802.11p standard and also had a large amount of discussion, but how to effectively handle the data under transmission we still don't have a solution.

According to this, this paper brings up a design which can enhance the signal when data is transmitting. This design can react quickly and is high effective, therefore when it's needed, we can transmit the data on time to the right receiver and cope with it furthermore.

[1] IEEE 802.11p-2010, "IEEE Standard for Information Technology- Telecommu-
nications and Information Exchange Between Systems- Local and Metropolitan
Area Networks- Specific Requirements- Part 11: Wireless LAN Medium Access
Control (MAC) and Physical Layer (PHY) Specifications," 2010.
[2] IEEE 1609.11-2010, "IEEE Standard for Wireless Access in Vehicular Environ-
ments (WAVE){ Over-the-Air Electronic Payment Data Exchange Protocol for
Intelligent Transportation Systems (ITS)," 2010.
[3] IEEE 1609.4-2010, "IEEE Standard for Wireless Access in Vehicular Environ-
ments (WAVE){ Multi-channel Operation," 2010.
[4] H. Cai and Y. Lin, "A Roadside ITS Data Bus Prototype for Intelligent High-
ways," Intelligent Transportation Systems, IEEE Transactions on Volume: 9 ,
Issue: 2, pp. 344{348, 2008.
[5] Wu Hsin-Te, Li Wei-Shuo, Su Tung-Shih, and Hsieh Wen-Shyong, "A Novel
RSU-Based Message Authentication Scheme for VANET," Systems and Net-
works Communications (ICSNC), 2010 Fifth International Conference on, pp.
111{116, 2010.
[6] M. Conti and S. Giordano, "Mobile ad-hoc networking,"in Proc. IEEE HICSS
'01, pp. 3428{3428, 2001.
[7] Li Fan and Wang Yu, "Routing in vehicular ad hoc networks: A survey," Ve-
hicular Technology Magazine, IEEE Volume: 2 , Issue: 2, pp. 12{22, 2007.
[8] Mahmoud Abuelela and Stephan Olariu, "Traffic-adaptive packet relaying in
VANET," in Proceedings of the fourth ACM international workshop on Vehic-
ular ad hoc networks ACM VANET '07, Sep. 2007.
[9] Saleh Yousefi, Mahmoud Siadat Mousavi, and Mahmood Fathy, "Vehicular Ad
Hoc Networks (VANETs): Challenges and Perspectives," ITS Telecommunica-
tions Proceedings, 2006 6th International Conference on, pp. 761{766, 2006.
[10] Tatsuaki Osafune, Lan Lin, and Massimiliano Lenardi, "Multi-Hop Vehicular
Broadcast (MHVB)," ITS Telecommunications Proceedings, 2006 6th Interna-
tional Conference on, pp. 757{760, 2006.
[11] B.K. Mohandas, A. Nayak, K. Naik, and N. Goel, "ABSRP- A Service Discovery
Approach for Vehicular Ad Hoc Networks," Asia-Pacific Services Computing
Conference, 2008. APSCC '08. IEEE, pp. 1590{1594, 2008.
[12] O. Abedi, R. Berangi, and M.A. Azgomi, "Improving Route Stability and Over-
head on AODV Routing Protocol and Make it Usable for VANET," Distributed
Computing Systems Workshops, 2009. ICDCS Workshops '09. 29th IEEE In-
ternational Conference on, pp. 464{467, 2009.
[13] M. Azarmi, M. Sabaei, and H. Pedram, "Adaptive routing protocols for ve-
hicular ad hoc networks," Telecommunications, 2008. IST 2008. International
Symposium on, pp. 825{830, 2009.
[14] J.A. Ferreiro-Lage, C.P. Gestoso, O. Rubinos, and F.A. Agelet, "Analysis of
Unicast Routing Protocols for VANETs," Networking and Services, 2009. ICNS
'09. Fifth International Conference on, pp. 518{521, 2009.
[15] O. Abedi, M. Fathy, and J. Taghiloo, "Enhancing AODV routing protocol using
mobility parameters in VANET," Computer Systems and Applications, 2008.
AICCSA 2008. IEEE/ACS International Conference on, pp. 229{235, 2008.
[16] I. Khan and A. Qayyum, "Performance evaluation of AODV and OLSR in
highly fading vehicular ad hoc network environments," Multitopic Conference,
2009. INMIC 2009. IEEE 13th International, pp. 1{5, 2009.
[17] K.A. Hafeez, Zhao Lian, Liao Zaiyi, and B.N.-W. Ma , "The Optimal Radio
Propagation Model in VANET," Systems and Networks Communications, 2009.
ICSNC '09. Fourth International Conference on, pp. 6{11, 2009.
[18] W.David Matolak, Sen Indranil, and Xiong Wenhui, "Channel Modeling for
V2V Communications," Mobile and Ubiquitous Systems: Networking & Ser-
vices, 2006 Third Annual International Conference on, pp. 1{7, 2006.
[19] Shouzhi Xu, Huan Zhou, Chengxia Li, and Yu Zhao, "A multi-hop V2V broad-
cast protocol for chain collision avoidance on highways," Communications Tech-
nology and Applications, 2009. ICCTA '09. IEEE International Conference on,
pp. 110{114, 2009.
[20] H. Boeglen, B. Hilt, P. Lorenz, J. Ledy, A.-M. Poussard, and R. Vauzelle,
"A survey of V2V channel modeling for VANET simulations," Wireless On-
Demand Network Systems and Services (WONS), 2011 Eighth International
Conference on, pp. 117{123, 2011.
[21] Yanlin Peng, Z. Abichar, and J.M. Chang, "Roadside-Aided Routing (RAR)
in Vehicular Networks," Communications, 2006. ICC '06. IEEE International
Conference on, pp. 3602{3607, 2006.
[22] L. Stibor, Yunpeng Zang, and H.-J. Reumerman, "Evaluation of Communi-
cation Distance of Broadcast Messages in a Vehicular Ad-Hoc Network Us-
ing IEEE 802.11p," Wireless Communications and Networking Conference,
2007.WCNC 2007. IEEE, pp. 254{257, 2007.
[23] "DSRC - Dedicated Short Range Communications Project."
from http://www.leearmstrong.com/DSRC/DSRCHomeset.htm.
[24] "The Network Simulator - NS-2."
from http://www.isi.edu/nsnam/ns/.
[25] "NO Ad-Hoc Routing Agent (NOAH)."
from http://icapeople.epfl.ch/widmer/uwb/ns-2/noah/.