车联网跨层设计基础理论与关键技术

项目名称： 车联网跨层设计基础理论与关键技术

项目编号： No.61331009

项目类型： 重点项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 刘富强

作者单位： 同济大学

项目金额： 285万元

中文摘要： 保障交通安全、提高通行效率是交通管理中最核心的目标，也是车联网需要具备的关键功能。在重大安全事故易发的高速公路环境中，信道类型演变多样，网络拓扑频发突变，如何保证安全消息的强实时性和高可靠性传输面临困难；此外，城市日益增加的车辆保有量易导致道路拥堵，如何保障各种车联网业务在复杂环境下的高效传输也面临挑战。车联网原有分层结构很难满足不同环境下的传输要求。因此，本课题首先针对高速公路进行信道特征分析，建立业务队列模型，研究层间传输延迟的耦合关系，设计分布式的跨层调度方法和分发机制，实现安全消息的快速可靠传递；针对城市路网分析网络级的信道特征，提供自适应的信道接入控制和业务感知相结合的跨层优化机制，实现多链路下的自适应切换和协同资源管理，保障多样化车联网业务的高效传输。同时，模拟宏——微移动相交互的交通及通信过程，构建虚实相结合的验证平台，再现交通行为和通信机理的可信特征，为算法验证提供科学判据

中文关键词： 车联网;跨层;交通安全;通行效率;

英文摘要： Internet of Vehicles (IoV) technologies are proved to be the key influence on road transportation management, in which assurance of road safety and boost of traffic efficiency serve as the main purpose. In high-speed freeways, where grave traffic accidents usually occur, both phases of vehicles, channel state and network topology frequently changes, resulting in great difficulty of satisfying reliability and real-time demands of safety applications. What’s more, increase in vehicle possession introduces heavier traffic congestion in urban transportation system, leading to another unsolved problem of efficient transfer of multi-demand applications through multi-link channel environment. It is impossible for the original hierarchical architecture of IoV to fulfill the requirements in diverse traffic scenarios. Therefore, cross-layer design has to be employed in IoV from the following aspects. Firstly for the freeway scenario, this research will analyze channel characteristics, establish queue model for different applications, calculate coupled transferring delay between layers, and design a distributed cross-layer scheduling and distributing mechanism, to provide rapid, reliable transfer of safety application messages. Then for the urban traffic scenarios, mobile channel characteristics will be estimated from the network perspective, adaptive medium access control will be optimized through combination of application demands and medium cognition, adaptive handover and cooperative wireless resource management will be implemented in multi-interface links, to offer highly efficient transfer for diverse applications. Last but not least, a simulation environment of macro and micro mobility interaction will be established for both transportation and communication procedures, where traffic behavior models, designed algorithms and communication protocols will be verified via hardware-in-loop simulation.

英文关键词： Internet of Vehicles;cross-layer;road safety;traffic efficiency