Exploitation of Opportunistic Spectrum for Vehicular Communication Systems

车载通信系统（Vehicular Communication Systems，简称VCS）是一种新兴的信息和通信技术，旨在提高道路安全，支持智能交通，并为道路上的用户提供信息娱乐服务。近年来，为了技术开发，在地球仪范围内开展了各种研究与开发活动。本研究课题是利用蜂窝网络、WiFi、专用短距离通信（DSRC）等异构无线网络技术，研究开发高效提供各种车载通信服务，特别是车载互联网接入中的高速大容量数据传输的新型工程解决方案。具体而言，该项目将开发（i）从蜂窝网络到WiFi/DSRC网络的智能数据流量卸载方案，（ii）蜂窝网络与WiFi/DSRC网络之间的互通框架，以实现无线网络中的无缝服务交付，以及（iii）在车辆环境中动态访问可用的电视无线电频谱以进行数据传输，利用车辆运动轨迹受限于道路几何形状的特性。

Vehicular communication systems (VCS) are an emerging information and communication technology aimed to improve road safety, support intelligent transportation, and provide infotainment services to users on roads. Various R&D activities around the globe have been carrying out in recent years for the technology development. This research project is to investigate and develop novel engineering solutions for efficiently providing various vehicular communication services, especially for high-rate large-volume data transfer in in-vehicle Internet access, by taking advantage of heterogeneous wireless networking technologies including cellular networks, WiFi, and the dedicated short-range communications (DSRC). In particular, this project will develop (i) an intelligent data traffic offloading scheme from cellular networks to WiFi/DSRC networks, (ii) an inter-working framework between cellular networks and WiFi/DSRC networks for seamless service delivery in VCS, and (iii) dynamic access on available TV radio spectrum for data transfer in a vehicular environment, making use of the property that vehicle movement trajectories are limited to road geometry.