市区车载自组织网络高效路由协议的研究

With the increasing development of vehicles and mobile smart terminals, the applications of vehicular ad hoc networks (VANETs) have broad prospects. Thus, the research on the key technologies of VANETs has a great value on theory and applications. This project focuses on urban scenarios and deeply studies the efficient routing protocols for VANETs, which include unicast, broadcast and geocast protocols. It can provide core support to vehicle network applications such as traffic safety, assistant driving, message delivery and information sharing. In unicast routing protocols, considering more realistic urban street scenarios, we first establish better routing models of street, propose methods of predicting the network performances of both the endside-to-endside in a street and the end-to-end in a network equipped with opportunistic routing strategy, and analyze the influence of routing metrics on the network performances of both the endside-to-endside in a street and the end-to-end in a network. Then, we propose schemes to realize the optimal selection of street sequences and relay nodes in a street. In broadcast routing protocols, based on broadcast relay nodes selection, we first comprehensively consider static and dynamic attributes of a street and establish analysis models of broadcast delay, broadcast efficiency and broadcast reliability. Then we propose strategies to realize fast, efficient and reliable broadcast by considering the benefits of sender-based and receiver-based broadcasts. In geocast routing protocols, we propose fast geocast routing protocols by considering geocast delay and reliability, and abiding geocast routing protocols by considering the selection and switching of information bearers, and message delivery.

随着汽车、移动智能终端的日益普及，车载自组织网络的应用具有广阔的前景，对其关键技术展开研究具有重要的学术和应用价值。本项目针对市区场景，深入研究车载自组织网络单播、广播、地理多播高效路由协议，以实现道路安全、辅助驾驶、信息推送、资源共享等车载网络应用的核心支持。在单播路由协议方面，基于更实际的城市道路环境建立更完善的街道路由模型、提出机会路由策略下的街道两端与全网网络性能预测方法、分析路由度量的选择对街道两端与全网网络性能的影响，实现街道序列和街道内转发节点最优选择。在广播路由协议方面，以广播中继节点选择为基础，建立综合考虑街道静态、动态属性的多跳广播时延、广播效率和广播可靠性分析模型；研究综合发送方指定、接收方决策优势的广播策略，提出快速、高效和可靠广播协议。在地理多播协议方面，研究综合考虑多播时延、可靠性的快速地理多播协议，综合考虑信息载体的选择、切换以及信息传递的持续性地理多播协议。

随着汽车、移动智能终端的日益普及，车载自组织网络的应用具有广阔的前景，对其关键技术展开研究具有重要的学术和应用价值。本项目针对市区场景，深入研究车载自组织网络单播、广播、地理多播高效路由协议，以实现道路安全、辅助驾驶、信息推送、资源共享等车载网络应用的核心支持。在单播路由协议方面，基于更实际的城市道路环境建立更完善的街道路由模型、提出机会路由策略下的街道两端与全网网络性能预测方法、分析路由度量的选择对街道两端与全网网络性能的影响，实现街道序列和街道内转发节点最优选择。在广播路由协议方面，以广播中继节点选择为基础，建立综合考虑街道静态、动态属性的多跳广播时延、广播效率和广播可靠性分析模型；研究综合发送方指定、接收方决策优势的广播策略，提出快速、高效和可靠广播协议。在地理多播协议方面，研究综合考虑多播时延、可靠性的快速地理多播协议，综合考虑信息载体的选择、切换以及信息传递的持续性地理多播协议。