面向城市环境的车载机会网络关键技术研究

项目名称： 面向城市环境的车载机会网络关键技术研究

项目编号： No.61502540

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 自动化技术、计算机技术

项目作者： 奎晓燕

作者单位： 中南大学

项目金额： 21万元

中文摘要： 在城市机动车数量急剧增加的环境下，车载网络能有效缓解日益严重的城市交通拥堵和交通事故难题，有助于构建城市智能交通系统。车载节点的高移动性和低密度性使得信息的传播难以通过传统端到端的有线网络进行。车载机会网络能充分利用间断的通信机会实现信息的有效传输，成为车载网络中重要的网络形态和研究热点。本项目以城市环境下的车载机会网络作为研究对象，研究内容包括：针对城市环境下车载移动规律及特征认识不足的现状，基于真实车辆移动数据，研究车载移动在空间切换、时间滞留等维度的强规律特性，建立适合车载网络的通信机会模型；研究利用路边辅助单元提高车载通信能力的网络结构，提出能够最小化基础设施部署代价并最大化网络性能增益的RSU部署策略；针对车载机会网络的数据转发难题，研究代价最小的车载机会转发与中继选择方案。本项目将为城市环境下构建实际可用的高效车载机会网络提供新的思路和技术支撑，具有重要的理论意义和应用价值。

中文关键词： 车载机会网络；车载通信；移动性模型；移动部署；中继选择

英文摘要： With the dramatic increase of the number of urban vehicles, traffic jams and traffic accidents become increasingly serious social issues around the world, vehicle network can effectively alleviate the above problem and can be an effective help to build the urban intelligent transportation system. Due to the high mobility and low density of vehicles, it is difficult to disseminate information through the traditional end-to-end connected networks. However, utilizing the vehicular mobility, the information can be efficiently transmitted by vehicular opportunistic network when communication opportunities arise. Thus, vehicular opportunistic networks become an important network form and a hot research topic. This project focuses on the study of urban vehicular opportunistic networks, there are three key research contents included in the project. Firstly, due to the lack of understanding the characteristic of vehicular mobility in urban environment, the mobility patterns based on realistic vehicular mobility traces will be investigated, and the urban vehicular mobility patterns in terms of area switching and residence time will be studied, and the suitable communication opportunistic model for vehicular network will be established. Secondly, study the network structure of roadside-aided vehicular opportunistic networks to improve the communication capabilities of the system, and further propose the deployment strategy that can deploy the roadside units with minimal infrastructure deployment costs while getting highest network performance gain. Finally, aiming to the data forwarding problem in vehicular opportunistic network, an optimal relay selection scheme to enhance the opportunistic forwarding efficiency with minimum forwarding cost will be proposed. The successful implementation of this project will push the application of construct efficient vehicle opportunity network in actual urban environment, and provide new technical support and important theoretical significance for the development of urban vehicular opportunistic network.

英文关键词： vehicular opportunistic network;vehicular communication;mobility model;mobile deployment;relay selection