Connectivity Analysis for Free-Flow Traffic in VANETs: A Statistical Approach

Abstract

Intervehicle communication gives vehicles opportunities to exchange packets within the limited radio range and self-organized in Ad Hoc manner into VANETs (Vehicular Ad Hoc Networks). However, due to issues such as the high mobility, insufficient market penetration ratio, and lacking of roadside units, connectivity is actually a big problem in VANETs. In addition, relying only on the direct connectivity in most of the previous works, say broadcasting which provides one-hop connections between nodes is far from the continuously growing application demands in VANETs, such as inter-vehicle entertainments, cooperative collision avoidances, and inter-vehicle emergency notifications. Therefore, the indirect connectivity from multihop forwarding is also a necessary complement especially for the case where direct connection is hardly achieved. In this paper, we define a new metric, that is, available connectivity, to consider both direct and indirect connectivity. After analyzing the statistical properties of direct and indirect connectivity in vehicular environment, the available connectivity is proposed and quantified for practical usage. Numerical results show that our available connectivity could provide correct and useful references for protocols design and performance improvements of different applications.

Vehicular Ad Hoc Network (VANET) Connectivity Analysis of a Highway Toll Plaza

“…The impacts of vehicle connectivity in various scenarios have been discussed by many researchers [15][16][17][18][19]. Tsiropoulou et al [20], in order to overcome the problem of parking in complex parking zones, such as on a campus or at an airport, proposed using a Radio Frequency Identification (RFID), a smart parking management system.…”

Logical Connectivity Prediction Models for VANET based on Nonlinear Regression and ELM: An Example of the AODV Protocol

“…The network training process of ELM can be treated as a nonlinear optimization problem, the objective function of which is expressed by (12). In case the hidden layer function is infinitely continuously derivable, the input weights and the hidden layer thresholds can be randomly assigned, and H would be a constant matrix.…”

“…Hence the logical connectivity study is also necessary in VANET. On the other hand, the mainstream research methods of VANET connectivity include graph theory based, probability analysis based, statistics based [12] and percolation theory based [13] methods. These methods are usually applied on the basis of some assumptions of vehicle distributions and movements.…”

ST Reliability and Connectivity of VANETs for Different Mobility Environments

“…To ensure reliable and real-time data distribution, the network should be strongly connected [13]. The impacts of vehicles connectivity in various scenarios have been discussed by many researchers [13] [14] [15] [27] [28]. The extended version of conventional cloud technology is Vehicular Cloud Computing (VCC), which enhances the advantages of VANET [16].…”

“…To measure the relationship between vehicles speed and inter-vehicle space a mobility metric named speed factor was proposed by the authors of [14]. They have considered the same speed at all time for every vehicle.…”