关键词: 车载Ad hoc网络, 原型系统, 实景测试

Abstract: As an application of mobile ad hoc network in the transportation realm，Vehicular Ad hoc Network（VANET） is a promising technology in Intelligent Transportation Systems（ITS）.Different with the network simulation method in the current researches，a prototype system of vehicular ad hoc network is built.A small scale network is formed by four nodes and it is also fully tested in real roads.The feasibility of the inter-vehicle communications in ad hoc manner is validated.The impact made by scenario and vehicle mobility on the wireless signal transmission is also quantitatively assessed.Several conclusions are drawn from the field tests for network protocol design and network deployment in the future.

Key words: vehicular ad hoc networks, prototype system, field tests