scholarly journals Safety Message Verification Using History-Based Relative-Time Zone Priority Scheme

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Sam Banani ◽  
Somsak Kittipiyakul ◽  
Surapa Thiemjarus ◽  
Steven Gordon
Keyword(s):  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Arrival Rate ◽  
Dense Network ◽  
Time Zone ◽  
Relative Time ◽  
Danger Zone ◽  
Safety Message ◽  
Priority Scheme ◽  
Hoc Networks

Safety message verification plays an important role in securing vehicular ad hoc networks (VANETs). As safety messages are broadcasted several times per second in a highly dense network, message arrival rate can easily exceed the verification rate of safety messages at a vehicle. As a result, an algorithm is needed for selecting and prioritizing relevant messages from received messages to increase the awareness of vehicles in the vicinity. This paper presents the history-based relative-time zone (HRTZ) priority scheme for selecting and verifying relevant received safety messages. HRTZ is an enhanced version of our previously proposed relative-time zone (RTZ) priority scheme. HRTZ achieves higher awareness of nearby vehicles and works in different road configurations. To increase awareness of neighboring vehicles, the average velocity of neighboring vehicles in the range of communication is used to determine the range of the danger zone and other zones. The messages are ranked based on the zone of transmitting vehicles, road configuration (with/without a barrier) and transmitting vehicle location and direction, and relative time between transmitting and receiving vehicles. Only the most up-to-date message from each vehicle is kept in the receiver’s buffer. As a result, each neighboring vehicle has only the most recent safety message in the buffer at any time. The simulation results show that HRTZ achieves a higher rate of verified messages with low delay for nearby vehicles and achieves higher awareness for vehicles in the vicinity, when compared to RTZ and other existing schemes.

scholarly journals Verifying Safety Messages Using Relative-Time and Zone Priority in Vehicular Ad Hoc Networks

Sensors ◽  
2018 ◽  
Vol 18 (4) ◽  
pp. 1195 ◽  
Author(s):  
Sam Banani ◽  
Steven Gordon ◽  
Surapa Thiemjarus ◽  
Somsak Kittipiyakul
Keyword(s):  
Ad Hoc Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Relative Time ◽  
Hoc Networks

scholarly journals LAB: Lightweight Adaptive Broadcast Control in DSRC Vehicular Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Linsheng Ye ◽  
Linghe Kong ◽  
Kayhan Zrar Ghafoor ◽  
Guihai Chen ◽  
Shahid Mumtaz
Keyword(s):  
Internet Of Things ◽  
Vehicular Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Wireless Channel ◽  
Typical Application ◽  
Safety Message ◽  
Channel Conditions ◽  
Hoc Networks ◽  
Performance Results

The Industrial Internet of Things (IIoT) is the use of Internet of Things (IoT) technologies in manufacturing. The vehicular ad hoc networks (VANETs) are a typical application of IIoT. Benefiting from Dedicated Short-Range Communication (DSRC) technology, vehicles can communicate with each other through wireless manner. Therefore, road safety is able to be greatly improved by the broadcast of safety messages, which contain vehicle’s real-time speed, position, direction, etc. In existing DSRC, safety messages are broadcasted at a fixed frequency by default. However, traffic conditions are dynamic. In this way, there are too many transmission collisions when vehicles are too dense and the wireless channel is underused when vehicles are too sparse. In this paper, we address broadcast congestion issue in DSRC and propose lightweight adaptive broadcast (LAB) control for DSRC safety message. The objectives of LAB are to make full use of DSRC channel and avoid congestion. LAB meets two key challenges. First, it is hard to adopt a centralized method to control the communication parameters of distributed vehicles. Furthermore, the vehicle cannot easily acquire the channel conditions of other vehicles. To overcome these challenges, channel condition is attached with safety messages in LAB and broadcast frequency is adapted according to neighboring vehicles’ channel conditions. To evaluate the performance of LAB, we conduct extensive simulations on different roads and different vehicle densities. Performance results demonstrate that LAB effectively adjusts the broadcast frequency and controls the congestion.

scholarly journals Vehicle Density Based Forwarding Protocol for Safety Message Broadcast in VANET

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Jiawei Huang ◽  
Yi Huang ◽  
Jianxin Wang
Keyword(s):  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Mac Protocol ◽  
Medium Access ◽  
Safety Message ◽  
Vehicle Density ◽  
Multihop Broadcast ◽  
Hoc Networks ◽  
Time Critical ◽  
Safety Applications

In vehicular ad hoc networks (VANETs), the medium access control (MAC) protocol is of great importance to provide time-critical safety applications. Contemporary multihop broadcast protocols in VANETs usually choose the farthest node in broadcast range as the forwarder to reduce the number of forwarding hops. However, in this paper, we demonstrate that the farthest forwarder may experience large contention delay in case of high vehicle density. We propose an IEEE 802.11-based multihop broadcast protocol VDF to address the issue of emergency message dissemination. To achieve the tradeoff between contention delay and forwarding hops, VDF adaptably chooses the forwarder according to the vehicle density. Simulation results show that, due to its ability to decrease the transmission collisions, the proposed protocol can provide significantly lower broadcast delay.

scholarly journals Performance Evaluation of a Multi-Hop Cluster Based Algorithm for Vehicular Ad-hoc Networks

2021 ◽  
Vol 9 (11) ◽  
pp. 802-812
Author(s):  
Poonam Thakur
Keyword(s):  
Ad Hoc Networks ◽  
Network Topology ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Fuzzy Topsis ◽  
Dense Network ◽  
Simulation Experiments ◽  
Efficient Resource ◽  
Hoc Networks ◽  
Ch Selection

Abstract: Vehicular ad hoc networks are characterized as the ad hoc networks with dynamic and dense network topology which faces issues like routing, data congestion, and overhead. One technique which has proved to be useful in managing VANETs is clustering. Clustering is a technique to divide the network into smaller, distributed and more stable hierarchical structure. The parameters like speed, position, distance, direction and mobility are used for clustering the networks. Clustering helps in load balancing, improving scalability, efficient resource allocation and reducing overhead. In this paper a multi-hop cluster-based algorithm (MhCA) for VANET is proposed which uses Fuzzy TOPSIS for CH selection based on Rank Index of nodes. The flowchart of the algorithm along with the description of the algorithm is given below in the paper. Extensive simulation experiments are run using the ns3 and SUMO to evaluate & compare the performance of proposed algorithm with the existing multi-hop algorithms like VMaSC and n-hop. Keywords: CH, CM, CH Change Duration, CH Duration, OSM, NS3.

Sign in / Sign up

Export Citation Format

Share Document