使用泛送機制為車間通訊應用程式設計與開發繞送協定

Abstract

智慧型運輸系統（Intelligent Transportation Systems，ITS）利用道路資料與路況資訊的即時傳遞，來增進道路運輸與車輛移動的效率，進而改善交通擁擠的程度,並提高行車安全以及促進相關的經濟活動。車間通訊(Inter-Vehicle Communication，IVC)為智慧型運輸系統發展的主流之一,其發展演進亦提供了許多相關的應用。一個車間通訊網路可被視為一個行動隨意無線網路(Mobile Ad-hoc Network，MANET)的特殊形式，現有的MANET相關技術可直接引用於這類型的網路。然而，由於此類網路拓撲具有快速變化的特性，使得舊有的繞送協定(如 AODV)不再適用。

我們應用泛送機制來發展新的繞送協定，本篇論文中具體的實驗及模擬結果證實，應用泛送機制來繞送封包可以適應變化快速的網路。然而此機制先天上的特性會導致重複傳送冗餘的封包及嚴重的封包脫序(Packets' out-of-ordering)問題。我們嘗試在不影響行動效能的情況下，改善這些衍生的問題，並已獲得初步的成果。

Inter-vehicle communication (IVC) provides useful applications in future Intelligent Transportation Systems (ITS). An IVC network is a special case of mobile ad hoc networks (MANET) with high node mobility. Although various existent MANET technologies can be applied to an IVC network directly, traditional routing protocols such as AODV can not adapt to this rapidly-changing network. To address this problem, we designed and implemented a flooding-based data forwarding protocol. The practical experiments and simulation results in this thesis showed that the proposed protocol is suitable for IVC networks. However, the derived problems such as redundant and out-of-order packets affect the performances and efficiency of the protocol greatly. This thesis also proposes several improvements for those problems.