城市车辆自组织网络的数据分发与路由选择关键技术研究

Vehicular ad hoc network (VANET in short, also called vehicular network, or vehicle-connected network) is a hot topic in the research and development of wireless networks and it plays a key role in improving the transportation capability of road networks, reducing vehicular energy expenditure, pollutant emission, and also traffic accidents, and enriching in-vehicle information services. In this project, we study vehicular networks in city environment and mainly consider the self-organization, high dynamics, delay-tolerance, and intermittent connectivity nature of VANET and also its opportunistic feature in data dissemination. The design objectives of this project are to effectively reduce the packet delivery latency, improve the success delivery ratio and optimize the network resource utilization. In this project, we shall fully utilize available auxiliary facilities and nodes such as fixed roadside relay nodes, and mobile gateways in the network, and shall fully take advantage of the short-term intermittent contacts and also long-term stable social relationship among vehicles, and accordingly carry out the following research work: Explore the networking structure and service model of VANETs, study the issue of route selection by using fixed roadside relays, mobile gateways, and social features, respectively, build optimization models for data exchanging and establish the relationship among various measures such as packet delivery latency, communication costs, buffer capacity, and gateway number, and consequently propose a series of efficient novel VANET routing mechanisms for vehicle-to-vehicle and vehicle-to-infrastructure communications, which can significantly reduce packet end-to-end delivery latency, increase the packet success delivery ratio, and also greatly improve the network resource utilization.

车辆自组织网络（也称车辆网络、车联网）是当前无线网络研究的热点，对提升路网交通能力、降低能源消耗和污染物排放以及交通事故率、提升车载信息服务水平具有重要意义。本项目以城市环境为应用背景，从车辆网络的自组织、高动态、容迟容断等网络特征和数据分发的机会特性出发，以降低分组投递延迟、提升投递率和优化网络资源利用率为设计目标，结合固定中继、移动网关等辅助设施，充分发掘并综合利用节点间的短暂间歇通信机会和长期稳定社会关系，开展以下研究：城市车辆自组织网络的网络结构和服务模型，研究结合固定中继、移动网关、社会属性的多样性车辆网络路由选择关键技术，建立投递延迟、通信成本、缓存容量、网关数量等不同约束条件下的车辆网络信息交互与路由优化模型，设计一系列针对不同网络条件和应用要求的车车、车路和互联网通信的新型车辆网络路由关键技术，显著降低分组投递延迟、提升车辆自组织网络的投递成功率和网络资源利用率。

车辆网络（也称车辆自组网、车联网）是无线网络和应用的研究热点，对提升路网交通能力、降低能源消耗和交通事故率、提升车载信息服务水平具有重要意义。本课题结合车辆网络的自组织、高动态、容迟容断等网络特征和数据分发的机会特性出发，以降低分组投递延迟、提升投递率和优化网络资源利用率为优化目标，展开以下研究：无线网络及D2D环境下的编码传输调度建模及其优化、结合缓存约束等因素的背压调度算法设计与评估、无线网络的效用优化与资源分配、多样性分布式路由算法设计与评估、移动视频分发模型与缓存策略、移动群智感知的任务分配模型与算法、基于移动汇聚节点的数据采集模型与算法、无线多跳网络的拓扑管理等。课题研究过程中，设计了一系列针对不同网络条件和应用要求的新型车辆网络组网关键技术，显著降低了分组投递延迟、提升车载网络的投递成功率和网络资源利用率。课题研究过程中，取得了一些列研究成果，共发表学术论文49篇，其中国际学术刊物23篇（其中IEEE期刊7篇，包括IEEE Transactions on Vehicular Technology、IEEE Network、IEEE Wireless Communications、IEEE Internet of Things Journal等）、国际学术会议24篇（其中IEEE通信学会旗舰会议15篇），申请国家发明专利2项，获得国际学术会议最佳论文奖1次、最佳学生论文奖1次、最佳论文提名1次，毕业研究生9名（其中博士生4名、硕士生5名），为车辆自组网的发展提供了技术支持、培养了人才。