面向车联网的协作机制及可靠通信方法研究

The VANET has become another sign of the future smart cities after the Internet and IoT, and it has both great scientific significance and application values. Different from traditional MANET, VANET has features such as high-speed network nodes, frequently changing network topology, easily affected by driver's behavior and surroundings, and without power constraints. What's more, many of the traditional network technologies are no longer suitable for VANET. A series of innovative research about cooperation mechanism and reliable communication methods for VANET will be carried out in this project. Firstly, we research on collaborative approaches of mixed VANET network which combines RSU, 3G and 4G. It involve the analysis of mobile model for real traffic environment, self-adaptive dynamic gateway management and collaborative data distribution based on multi-RSU. At the same time, VANET's clustering technologies are studied, which consist of clustering technologies based on mobile model, clustering technologies associated with the scenarios, and clustering technologies based on emotional factors. In addition, we research on reliable routing protocols for VANET, including evaluation methods for link quality, segmented greedy geographic routing protocols based on RSU, and cooperative routing protocols related with social network. Besides, we study of efficient and reliable VANET broadcast mechanisms. It contains broadcast retransmission strategy with the characteristics of low data redundant, fast-forward mechanism using reserved broadcast channels, and how to keep connection alive under sparse model in a VANET's broadcast domain. The results of this research project will provide theoretical and technical support for VANET's application and popularity.

继互联网、物联网之后，车联网成为未来智慧城市的另一个标志，具有重大的科学意义和应用价值。与传统MANET不同，车联网具备节点高速移动、网络拓扑变化频繁、易受驾驶员行为及环境影响、无电源约束等特征，很多传统技术难以适用。本项目拟针对车联网环境下的协作机制和可靠通信方法进行创新性研究。首先研究融合RSU和3G/4G网络的协作方法，包括移动模型分析、动态自适应网关管理方法和基于多RSU的协同数据分发；然后研究车联网的分簇技术，包括基于移动模型、与场景相关以及引入情感因素的分簇方法；同时研究可靠路由协议，包括突发性链路质量评测方法，基于RSU的分段贪婪地理路由以及基于社会网络的协作路由；最后研究高效可靠的广播机制，包括高可靠低冗余的广播数据重传策略、支持预留广播通道的快速转发机制和面向车辆稀疏模型的广播域连通性保障方法。本项目的研究成果将为车联网的应用和普及提供理论支撑和技术保障。

车联网能够实现车辆之间以及车辆与基础设施之间的无线通信，有助于提高交通运输效率和交通安全，是智能交通的重要组成部分。本项目针对车联网环境下的协作机制、紧急消息广播、可靠通信方法、车辆协同选路、条件隐私保护策略、聚合签名认证方案等进行深入研究。主要研究成果包括：基于移动云服务的车联网数据上传策略；无间隙的车联网协助下载方法；车联网环境的数据调度方法；智能交通控制机制；车联网环境下的紧急消息广播方法；城市车辆协同选路方法；基于位置的车联网条件隐私保护认证方案；无线网络下的聚合签名技术；以及智慧城市中高效匿名的加密认证方案等。我们针对车联网中的协作机制、可靠通信、消息广播、数据调度、隐私保护、聚合签名、加密认证等进行创新性研究，提出了一系列算法、方法和机制，为车联网的应用和普及提供了理论支撑和技术保障。