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基于车载自组织网络(Vehicular Ad Hoc Network,VANET)的数据传递为VANET应用提供数据传输服务,是车辆主动安全、城市生活服务、应急救援等应用不可或缺的组成部分。然而,由于网络拓扑变化快、网络分区频繁、信道容量有限,VANET数据传递面临诸多挑战。文章分析了VANET的特点,指出了影响VANET数据传递的主要因素,进而综述了已有的VANET数据传递技术,包括VANET数据传递的基本实现方法和提高数据传递能力的优化策略。
Data transmission based on Vehicular Ad Hoc Network (VANET) provides data transmission services for VANET applications. It is an indispensable part of applications such as vehicle active safety, city life service and emergency rescue. However, due to the rapid changes in the network topology, frequent network partitioning and limited channel capacity, VANET data transfer faces many challenges. This paper analyzes the characteristics of VANET, points out the main factors affecting VANET data transmission, and then summarizes the existing VANET data transmission technologies, including the basic implementation of VANET data transmission and the optimization strategy to improve data transmission capabilities.