Emergency Message Dissemination in Vehicular Networks: A Review

Muhammad Uzair Ghazi,Muazzam A Khan Khattak,Balawal Shabir,Asad W Malik,Muhammad Sher Ramzan

doi:10.1109/access.2020.2975110

Abstract

The number of vehicles on the roads has increased proportionally over the last couple of years and this number is likely to rise due to the increase in population growth and the number of vehicles that are manufacturing every day. This high traffic density leads to several problems, from which effectively disseminating the emergency messages is a major concern. Keeping in view the dynamic characteristics of VANETs, significant challenges are faced in disseminating the message across the network. The major challenges are the broadcast storm problem, hidden node problem and the packet collision. Many studies have been performed to devise an effective and reliable mechanism for disseminating emergency messages in a Vehicular ad-Hoc Network (VANET). Researchers have proposed different models to tackle various types of scenarios for emergency message dissemination. This paper not only reviews some recent contributions to emergency message dissemination in vehicular networks but also discusses various proposed methods based on Intelligent Transportation System (ITS), Internet of Things (IoT), Priority messaging, Clustering approach, Software Defined Network (SDN) and Fog Computing. We have also tried to explore the latest developments in emergency message dissemination using 5G networks.

Highlights

The traffic density has increased over the last few years due to rapid growth in the world population
1) Hybrid-Vehfog: Approach for the Dissemination of Critical Messages in Connected Vehicles(H-VFog) [66] – The authors of this paper have proposed a hybrid protocol for disseminating the critical messages in Vehicular ad-Hoc Network (VANET) using an approach based on Fog Computing
Minimal Latency and delay are required in VANET so in this case, Fog Computing schemes will be beneficial as they are designed for low delay communication

Summary

INTRODUCTION

The traffic density has increased over the last few years due to rapid growth in the world population. The duration of contact between the vehicles is very small, the emergency message dissemination should be proper across the nodes, and they should reach their destination successfully in the least amount of time [13]. 5) Comfort Application VANET helps to deliver information to the drivers at the right place at the right time to make their traveling experience enjoyable and comfortable This information includes gas station location, rest area, nearby restaurants, weather update, route navigation, parking lot, etc. Disseminating the emergency messages is a challenging task, keeping in view the challenges faced in VANETs. It is very important to make sure that the network traffic for emergency services successfully reaches its destination in the least possible time. The available models that offer reliable emergency message dissemination in vehicular networks?

CLASSIFICATION OF EMERGENCY MESSAGE DISSEMINATION TECHNIQUES

COMPARATIVE ANALYSIS

SIMULATING THE NETWORK TRAFFIC

Findings

CONCLUSION AND FUTURE WORK