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研究生:潘泓任
研究生(外文):Hung-JenPan
論文名稱:應用於車載網路中利用即時的交通資訊動態調整車輛導航路徑紓緩區域性的交通阻塞問題
論文名稱(外文):A Dynamically Adjusted Vehicles Navigation Scheme with Real-time Traffic Information to Relieve Regional Traffic Congestion in Vehicular Ad-hoc Networks
指導教授:斯國峰
指導教授(外文):Kuo-Feng Ssu
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電腦與通信工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2016
畢業學年度:104
語文別:英文
論文頁數:39
中文關鍵詞:車載網路軌跡資訊交通阻塞
外文關鍵詞:vehicular networktrajectory informationtraffic congestion
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大多數的都會地區,交通阻塞是一個很重要的議題,使駕駛人需要花費更
長的時間到達其目的地,當有一些大型活動舉行時,像是球賽、演唱會等,
舉行在都市區域的時候,會造成區域性的交通阻塞。當事故發生在都市區域
的時候,亦會造成交通阻塞的問題。本篇提出動態限制路段協定,利用動態
限制路段方式避免車輛進入發生交通阻塞之區域,造成更嚴重的交通阻塞,
而在交通阻塞之區域內的車輛,可以快速的疏散離開此區域。根據使用者分
享的行駛軌跡資訊(Trajectory Information)以及事件發生的地點,中央伺服器去動態的決定一個限制的區域,並且動態的調整限制區域的大小,及調整車輛的行駛路徑,使得區域外的車輛可以避開進入此區域,區域內的車輛能夠快速的離開此區域。除此外本篇亦提出動態調整限制區域大小、車輛分流機制因應既定行程會造成的交通阻塞,以及提出臨時限制區域的機制去處理臨時事件發生時,可能會造成的交通阻塞問題。模擬結果顯示,本篇的方法與最短路徑演算法相比,可以有效的減少車輛的行車時間。

Nowadays, with the number of vehicles increasing rapidly, road traffic congestion in urban areas becomes a significant issue. When the accident occurs, it usually causes regional traffic congestion. The big events held in the certain location (e.g., sport games, concert, etc.) also cause regional traffic congestion. In this thesis, a dynamically restricted road segments protocol is proposed for quickly evacuating vehicles from the area and prohibiting vehicles from entering into the area where traffic congestion happens. The trajectory information maintained in the server assists determining the size of restricted area. In this work, the server determines the restricted area where the event occurs and then checks the position of all cars to adjust the size of restricted area. When the restricted area is determined, the server checks whether vehicles are in the restricted area or not. If vehicles are in the area, the sever uses car-flow scheme to let the vehicles leave the restricted area. The other vehicles which are out of the restricted area obtain a path to avoid the area. In addition, mechanisms of dynamically adjusted restricted area, car-flow, and temporarily restricted area are proposed to reduce regional traffic congestion problem. The simulation results demonstrate that the work, on average, could reduce 10\% travel time to evacuate vehicles, compared to the shortest path algorithm.
Table of Contents
Chapter
1 Introduction : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1
1.1 Vehicular Ad-hoc Networks . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Application of Trajectory Information in VANET . . . . . . . . . . . . . 2
1.3 Main Idea and Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Related Work : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 5
3 System Model : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 10
3.1 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Protocol Description : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 13
4.1 Static Restricted Area Scheme . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Dynamically Adjusted Restricted Area Scheme . . . . . . . . . . . . . . . 15
4.3 Car-flow Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.4 Temporarily Restricted Area Scheme . . . . . . . . . . . . . . . . . . . . 21
4.4.1 Vehicle is in the temporarily restricted area . . . . . . . . . . . . 22
4.4.2 Vehicle is not in the temporarily restricted area . . . . . . . . . . 25
5 Performance Evaluation : : : : : : : : : : : : : : : : : : : : : : : : : : : : 28
5.1 Simulation Environment Setup . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2 Simulation of Scheduled Events . . . . . . . . . . . . . . . . . . . . . . . 29
5.3 Simulation of Temporary Events . . . . . . . . . . . . . . . . . . . . . . . 31
6 Conclusion and Future Work : : : : : : : : : : : : : : : : : : : : : : : : : 34
6.1 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.2 Future Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
References : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 37
Vita : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 39
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