Kaiwartya Omprakash, Kumar Sushil, Lobiyal D K, Abdullah Abdul Hanan, Hassan Ahmed Nazar
Wireless Communications and Networking Research Lab, School of Computer and Systems Sciences, Jawaharlal Nehru University, New Delhi 110067, India.
Faculty of Computing, Universiti Teknologi Malausia (UTM), Skudai Johor 81310, Malaysia.
Sensors (Basel). 2014 Nov 25;14(12):22342-71. doi: 10.3390/s141222342.
Geographic routing is one of the most investigated themes by researchers for reliable and efficient dissemination of information in Vehicular Ad Hoc Networks (VANETs). Recently, different Geographic Distance Routing (GEDIR) protocols have been suggested in the literature. These protocols focus on reducing the forwarding region towards destination to select the Next Hop Vehicles (NHV). Most of these protocols suffer from the problem of elevated one-hop link disconnection, high end-to-end delay and low throughput even at normal vehicle speed in high vehicle density environment. This paper proposes a Geographic Distance Routing protocol based on Segment vehicle, Link quality and Degree of connectivity (SLD-GEDIR). The protocol selects a reliable NHV using the criteria segment vehicles, one-hop link quality and degree of connectivity. The proposed protocol has been simulated in NS-2 and its performance has been compared with the state-of-the-art protocols: P-GEDIR, J-GEDIR and V-GEDIR. The empirical results clearly reveal that SLD-GEDIR has lower link disconnection and end-to-end delay, and higher throughput as compared to the state-of-the-art protocols. It should be noted that the performance of the proposed protocol is preserved irrespective of vehicle density and speed.
地理路由是研究人员在车载自组织网络（VANETs）中为可靠高效地传播信息而研究最多的主题之一。最近，文献中提出了不同的地理距离路由（GEDIR）协议。这些协议专注于缩小朝向目的地的转发区域以选择下一跳车辆（NHV）。即使在车辆密度高的环境中以正常车速行驶，这些协议中的大多数也存在单跳链路断开率高、端到端延迟大以及吞吐量低的问题。本文提出了一种基于路段车辆、链路质量和连通度（SLD - GEDIR）的地理距离路由协议。该协议使用路段车辆、单跳链路质量和连通度标准来选择可靠的下一跳车辆。所提出的协议已在NS - 2中进行了模拟，并且其性能已与现有最先进的协议：P - GEDIR、J - GEDIR和V - GEDIR进行了比较。实证结果清楚地表明，与现有最先进的协议相比，SLD - GEDIR具有更低的链路断开率和端到端延迟，以及更高的吞吐量。需要注意的是，无论车辆密度和速度如何，所提出协议的性能都能保持。
