The real-time traffic information dissemination among on-road vehicles has been envisioned via realizing vehicular ad hoc networks (VANETs) as smart service-oriented roadside wireless sensor networks. The network enables various types of real-time traffic applications related to safety and infotainment for drivers and passengers. The information dissemination-centric routing protocols for vehicular networks have to dynamically adopt under the constrained network environment while considering the higher mobility of vehicular nodes and unpredictable physical topologies in the network. The issue needs to be addressed through smart and network-aware routing protocols. Geographical routing protocols have witnessed significant attention for information dissemination under these types of dynamic vehicular network environment. To this end, this paper presents an improved road segment-based geographical routing (ISR) protocol focusing on better head node selection for information dissemination. It divides the forwarding area into a number of road segments and selects a head node on each segment by focusing on traffic-aware information including the location, direction, and link quality-centric score for every vehicle on each road segment. Algorithms were developed for the complete process of head node selection and information dissemination among vehicles on the road segments. The simulation results attested the performance benefits of the proposed routing framework as compared to the state-of-the-art protocols considering dynamic vehicular traffic environment-related metrics.

中文翻译：

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车载自组织网络的改进的基于路段的地理路由协议

通过将车辆自组织网络（VANET）实现为面向智能服务的路边无线传感器网络，可以预见道路车辆之间的实时交通信息传播。该网络支持与驾驶员和乘客的安全性和信息娱乐有关的各种实时交通应用。用于车载网络的以信息传播为中心的路由协议必须在受约束的网络环境下动态采用，同时要考虑车载节点的更高移动性和网络中不可预测的物理拓扑。此问题需要通过智能且可感知网络的路由协议解决。在这些类型的动态车载网络环境下，地理路由协议已经引起了信息发布的极大关注。为此，本文提出了一种改进的基于路段的地理路由（ISR）协议，重点是用于信息发布的更好的头节点选择。它将转发区域划分为多个路段，并通过关注交通感知信息（包括位置，方向和每个路段上每辆车的链接质量为中心的分数）在每个路段上选择头节点。开发了用于在路段上的车辆之间进行头节点选择和信息传播的完整过程的算法。与考虑动态车辆交通环境相关指标的最新协议相比，仿真结果证明了所提出的路由框架的性能优势。