的效能,由模擬實驗結果得知,路況交通覺知路由協定(RTARP)與 Epidemic Routing 及 Spray and Wait Routing 相比下有較佳的效能。
在訊息送達率中,當網路的節點愈多規模愈大以及傳輸距離越長時,雖然訊息送達 率有所上升,但路況交通覺知路由協定(RTARP)相較於 Epidemic routing 及 Spray and Wait Routing 仍有較佳的訊息送達率;針對網路的傳輸負載,我們提出的方法因使用單 節點間管控廣播傳輸方式(One-Hop Controlled Flooding)進行路況交通資訊的交換,因此 所得數值較低;在路況交通資訊(RTI)平均交換數量方面,雖然本研究所提出之路況交通 覺知路由協定(RTARP)均較低,但與 Epidemic routing 及 Spray and Wait Routing 相差不 到 5%;最後在路況交通資訊(RTI)正確率部分,本研究就所提出之路況交通覺知路由協
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(RTI)正確率等方面,會與區塊大小的增加成正比,可見路況交通覺知路由協定(RTARP) 在進行路況資料收整時,仍保有相當的正確率。
5.2 未來展望
我們提出的路況交通覺知路由協定(RTARP),目前僅能針對所有車輛已行駛過的路 段之交通資訊進行整合,倘若能以其它無線網路傳輸方式(例如 3G、WiMAX 或 4G LTE 等)結合交通管理中心(Traffic Management Center-TMC)或其他第三方所提供的路況資 訊,進而將所有路況資訊進一步彙整,取得節點自身所缺少的道路路況資訊,必定對行 車路徑的最短旅途時程規畫有相當大的助益,因此後續該如何整合不同系統的路況資 訊,可以作為未來進一步研究的方向;另外本研究的路況交通覺知路由協定(RTARP)是 以接收者為基礎(Receiver based)的路由協定,透過接收路況資訊的節點來選擇所需的路 況交通資訊,未來也可針對以傳送者為基礎(Sender based)的路由協定,作進一步的研究 與比較。
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