A Water-Wave Broadcast Scheme for Emergency Messages in VANET

Abstract

Vehicular Ad Hoc Network (VANET) is an emerging new technology and a promising platform for the intelligent transportation system. The most important application of VANET is disseminating emergency messages to drivers in case of dangerous events. The effectiveness depends on the design of a broadcast scheme. A simple broadcast scheme encounters many problems such as broadcast storm, connection hole, building shadow, and intersection problems. In this paper, we propose an efficient broadcast scheme that simulates water wave propagation to spread emergency messages. This scheme provides warning services with both space and time constraints. Most existing broadcast schemes provide inadequate strategies for limiting the time period of a warning. We verified the performance of our proposed scheme in a simulated street environment with vehicle movements to show the superiority of this scheme in high broadcast coverage areas.

Data communication in VANETs: Protocols, applications and challenges

“…Vehicular networks can be used for effective monitoring of environmental conditions and social activities in urban areas, playing an important role in urban sensing [12,71]. Urban sensing applications can be further potentialized when smartphone capabilities taken onboard can be used complementarily with VANET sensors [36,40]. In this context, the design of a Vehicular Sensor Network (VSN) introduces novel and challenging issues, which are considerably different from traditional wireless sensor networks, thus requiring innovative solutions.…”

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

“…The vehicle density can be calculated by (1), where n is the vehicle number and l is the roadway length.…”

“…It is a promising application-oriented network deployed along a roadway for 1) vehicular safety-related applications such as collision warning systems, road condition warning, lane-changing assistance [1,2], 2) transportation efficiency-related applications such as traffic light control, vehicle navigation [3,4] and 3) entertainment applications. Unlike conventional ad hoc wireless types of networks, a VANET may be required to deal with some new issues caused by the road traffic environment.…”

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