Broadcasting safety information in vehicular networks: issues and approaches (original) (raw)
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Safety information dissemination in vehicular networks using facilities layer mechanisms
2014 IEEE Wireless Communications and Networking Conference (WCNC), 2014
Vehicle ad-hoc networks are considered as an essential building block of future intelligent transportation systems. One of the major roles of vehicular communication is the dissemination of information on the road in order to increase the awareness of the drivers and improve road safety. The facilities layer is a recently standardized component in the vehicular communication architecture, with an important role to play in the process of information dissemination. In this paper, we propose facilities layer-based mechanisms for information propagation and we show they outperform classical network layer solutions. We also demonstrate that previous studies that do not consider the cohabitation of different types of safety messages on the vehicular control channel highly underestimate the dissemination delay, which can lead to unrealistic assumptions in the design of safety applications.
Efficient broadcasting of safety messages in multihop vehicular networks
2006
Abstract We focus on a vehicular network supporting safety applications, and we present an application and a channel access mechanism for efficient multihop broadcasting. We study the performance of the proposed solution by developing an analytical framework, which provides several metrics relevant to message dissemination. Analytical results are compared with the performance obtained through ns
Efficient Safety Message Dissemination in Vehicular Ad Hoc Networks
2019
Over the past few years, the occurrence of enormous human, societal, environmental and economic losses due to traffic accidents has led toward a search for highly innovative and practical solutions to improve safety on the roads. One such initiative is the introduction of Intelligent Transportation Systems (ITS), whereby a vital application is to ensure road safety by fast and reliable dissemination of safety messages. This research develops novel and practical schemes to efficiently and reliably disseminate safety information in Vehicular Ad Hoc Networks (VANETs) using Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication to improve the transportation safety. Firstly, an innovative multi-hop broadcasting protocol is developed, which exploits a smart forwarder selection process, handshake-less broadcasting, ACK Decoupling and efficient collision resolution mechanism. This protocol significantly improves the speed of safety message propagation without compromisin...
Journal of Communications, 2019
Nowadays, cooperative ITS is the trend and the focus of the world, which can solve traffic safety problems through data dissemination in Vehicular Ad-hoc Networks (VANETs). Messages generated by different applications have different levels of urgency, thus they should have different priorities and Quality of Service (QoS) requirements. At present, most researches simply prioritize messages based on the message type, and set fixed priorities for messages according to the empirical urgency level. The fixed priority setting cannot adapt to the actual dynamic traffic environment. Therefore, according to the urgency level of different applications, we propose a dynamic priority algorithm and a cross-layer prioritymapping method to implement broadcasting messages with different priorities. In order to reflect more accurate priority of messages timely, several aspects are considered, including the current transportation situation, effective range and multi-hop broadcasting. Then the priority is mapped to the MAC layer in reference to the EDCA protocol. Several parameters in MAC layer are adjusted to provide different QoS levels for different messages. The simulations verify the performance of broadcasting messages with different priorities and the advantages of the proposed broadcasting mechanism. Index Terms-VANETs, cross-layer design, QoS, dynamic priority I. INTRODUCTION ITS is significant for smart city, which can provide safer and more convenient transportation environments. Cooperative ITS, the next generation intelligent transportation systems, focuses on localized vehicle-tovehicle (V2V) and vehicle-to-infrastructure (V2I) communication to support safety, mobility and environmental applications by organizing vehicular ad hoc networks (VANETs). Many active safety applications, such as emergency electronic brake lights, pre-crash warning, cooperative forward collision warning, left turn assistant, lane change warning, can be implemented by broadcasting warning messages timely in VANETs. The messages exchanged in VANETs for active safety can be divided into two categories: periodical beacon messages and event-driven messages, like traffic signal violation warning. The event-driven messages are usually those produced in emergencies or traffic accidents. In VANETs,
BSM: Broadcasting of Safety Messages in Vehicular Ad Hoc Networks
Arabian Journal for Science and Engineering, 2013
One important application in Vehicular ad hoc networks, VANET, is applied for the cooperative collision avoidance (CCA) in the intelligent transportation system, ITS. In CCA, a driver could broadcast emergency messages to advice the vehicle behind accident through VANET. Thus how to design an efficient broadcasting method for forwarding the emergency messages is important in ITS. However, most of researches focused on avoiding broadcast storm by selecting only one forwarder for broadcasting. In this way, it caused that emergency messages could not be spread in other direction roads. Thus the cars in these directions of the crossroad cannot receive the emergency messages to prevent the traffic accident. To address this issue, we proposed an emergency messages broadcasting by multi-forwarder (EMBM) to select the appropriate forwarders for each brand at the intersection. Thus the emergency message could be forwarded through each brand when the messages were broadcasted across the intersection. The simulation results showed that the reachability in EMBM was 44.9 % and higher than that in binary partition assisted broadcast (BPAB), and 46.6 % higher than that in cell broadcast for streets, CBS. The average delay time of EMDM was 32.3 % lower than that in BPAB, and 69.1 % lower than that in CBS.
Efficient Dissemination to Ensure Active Safety in Vehicular Networks
Proceedings of the First Annual International Symposium on Vehicular Computing Systems, 2008
Exchange of geographical movement information is an important and potential life-saving feature for vehicular systems. By exchanging and processing their movement information, vehicles can easily detect dangers such as intersection collisions or notification of accidents ahead, thus improving the safety of drivers and passengers on the road. Many applications for active safety in Vehicular Ad-Hoc Networks (VANETs) operate in a decentralized fashion, namely by Vehicle-to-vehicle (V2V) communications without using any infrastructure. This paper describes such a kind of vehicular communication system that uses an efficient dissemination mechanism known as MHVB for the exchange of geographical location information at the network layer. The system targets active safety applications that have high requirements with respect to transmission delay and packet loss probability. The paper then proceeds to explain the process of communication that takes place between the nodes in the VANET. Finally we try to analyze the NS2 simulation results and provide some conclusions on the system.
Effect of Intelligent Vehicle Networks On Roadways Safety
Most accidents happens because of lack of Visibility and not Driver's reaction on time when an accident occurs. Increasing required Time for driver's reaction caused to decreasing accidents on roadways .intelligent vehicle networks brings enough time for reaction by sending alert and alternate messages to vehicles on roadway. Main propose in this paper is around modulation on Reception interval Safety message and other effective parameters on vehicles safety at CCWS applications. Effect of alert and alternate messages will be examined and modeled with Markov chain. For verification, simulation result we will used Monte Carlo method, compare result with each other, and calculated probability of collision for those vehicles that used vehicles network on roadway. Keywords: At least four key words or phrases in alphabetical order, separated by commas.
Towards Improving Road Safety Using Advanced Vehicular Networks
TELKOMNIKA Telecommunication Computing Electronics and Control, 2018
Vehicular Ad-hoc Networks (VANETs) are advanced network technologies applied to improve safety on roads and to offer suitable solutions for Intelligent Transportation Systems (ITS). The goal of VANETs is to assistdrivers and to act as a smart co-pilot that can alret about accidents and help avoiding them while prodivding high-end infotainment systems for b oth the driver and passengers. Consequently, VANETs can save millions of lives around the world, especially in Saudi Arabia, which has a very high rate of road accidents annualy. In this paper, we introduce and discuss VANETs, related routing protocols, challenging problems, and the existing solutions. This work is a part of a bigger project that aims to enhance VANETs technologies and to updapteITS to significantly promote road safety in general and Saudi Arabia's roads in particular.
A Surveying on Road Safety Using Vehicular Communication Networks
2012
Today's people are more and more concerned about their privacy and security. Vehicular communication (VC) systems have the potential to improve road safety and driving comfort. Vehicular communication based on wireless short-range technology enables spontaneous information exchange among vehicles and with road-side stations. A novel class of wireless networks that have emerged advances in wireless technologies and the automotive industry. This will enable the formation of vehicular networks, commonly referred to as VANETs, an instance of mobile ad hoc networks with cars as the mobile nodes. Security and privacy must be two primary concerns in the design of vehicular networks. Vehicular ad hoc networks (VANETs) are a specific type of self-organizing mobile ad hoc networks. So far, the security of Vehicular Communication applications has mostly drawn the attention of research efforts, accident prevention and post-accident investigation, while comprehensive solutions to protect the...