中文摘要：

交通信息的分发是车联网VANETs（Vehicular Ad Hoc Networks）的重要应用之一,而交通信息的分发依赖于广播方案。为此,针对VANETs提出了许多新的多跳广播方案。首先对现有的多跳广播方案进行了分类,然后着重分析和总结了近年来具有代表性的广播方案,随后,对评估这些方案的性能指标进行总结,并从方案的评估模型、仿真平台以及使用的性能指标这三个方面对这些方案进行比较。最后,指出理想的广播方案未来可能的突破方向。

英文摘要：

Disseminating traffic information is one of important application, which relies on broadcasting protocols. Many new routing protocol are presented for VANETs（Vehieular Ad Hoe Networks）. Firstly, there protocols are classified, and the existing representative routing protocols for VANETs are analyzed and summarized.Moreover, performance metric of the existing routing protocols is summa- rized, and a qualitative comparison with evaluation model, simulation platform and metric is given in this paper. Finally, possible directions of future research related to broadcasting protocol are proposed.