scholarly journals QoSHVCP: Hybrid Vehicular Communications Protocol with QoS Prioritization for Safety Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Ahmad Mostafa ◽  
Anna Maria Vegni ◽  
Talmai Oliveira ◽  
Thomas D. C. Little ◽  
Dharma P. Agrawal
Keyword(s):  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Traffic Density ◽  
Great Promise ◽  
Vehicular Communications ◽  
Network Infrastructure ◽  
Switching Algorithm ◽  
Communications Protocol ◽  
Hoc Networks ◽  
Protocol Switching

This paper introduces a hybrid communication paradigm for achieving seamless connectivity in Vehicular Ad hoc Networks (VANETs), wherein the connectivity is often affected by changes in the dynamic topology, vehicles’ speed, as well as the traffic density. Our proposed technique named QoS-oriented Hybrid Vehicular Communications Protocol (QoSHVCP) exploits both existing network infrastructure through a Vehicle-to-Infrastructure (V2I), as well as a traditional Vehicle-to-Vehicle (V2V) connection that could satisfy Quality-of-Service requirements. QoSHVCP is based on a V2V-V2I protocol switching algorithm, executed in a distributed fashion by each vehicle and is based on the cost function for alternative paths each time it needs to transmit a message. We utilize time delay as a performance metric and present the delay propagation rates when vehicles are transmitting high priority messages via QoSHVCP. Simulation results indicate that simultaneous usage of preexisting network infrastructure along with intervehicular communication provide lower delays, while maintaining the level of user’s performance. Our results show a great promise for their future use in VANETs.

Traffic Density-Based Broadcast Scheme for Vehicular Ad Hoc Networks

2012 ◽  
Vol E95.B (12) ◽  
pp. 3875-3878 ◽  
Author(s):  
Dong-Won KUM ◽  
Ajmal KHAN ◽  
You-Ze CHO
Keyword(s):  
Ad Hoc Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Traffic Density ◽  
Hoc Networks

scholarly journals A Bipolar Traffic Density Awareness Routing Protocol for Vehicular Ad Hoc Networks

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
David Chunhu Li ◽  
Li-Der Chou ◽  
Li-Ming Tseng ◽  
Yi-Ming Chen ◽  
Kai-Wei Kuo
Keyword(s):  
Ad Hoc Networks ◽  
Routing Protocol ◽  
Routing Protocols ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Path Selection ◽  
Traffic Density ◽  
Delivery Ratio ◽  
Packet Delivery ◽  
Hoc Networks

To support an increasing amount of various new applications in vehicular ad hoc networks (VANETs), routing protocol design has become an important research challenge. In this paper, we propose a Bipolar Traffic Density Awareness Routing (BTDAR) protocol for vehicular ad hoc networks. The BTDAR aims at providing reliable and efficient packets delivery for dense and sparse vehicle traffic network environments. Two distinct routing protocols are designed to find an optimal packet delivery path in varied vehicular networks. In dense networks, a link-stability based routing protocol is designed to take vehicles connectivity into consideration in its path selection policy and maximize the stability of intervehicle communications. In sparse networks, a min-delay based routing protocol is proposed to select an optimal route by analyzing intermittent vehicle connectivity and minimize packets delivery latency. Intervehicles connectivity model is analyzed. The performance of BTDAR is examined by comparisons with three distinct VANET routing protocols. Simulation results show that the BTDAR outperforms compared counterpart routing protocols in terms of packet delivery delay and packet delivery ratio.

scholarly journals Distributed Edge Computing to Assist Ultra-Low-Latency VANET Applications

2019 ◽  
Vol 11 (6) ◽  
pp. 128 ◽  
Author(s):  
Andrei Vladyko ◽  
Abdukodir Khakimov ◽  
Ammar Muthanna ◽  
Abdelhamied A. Ateya ◽  
Andrey Koucheryavy
Keyword(s):  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Road Accident ◽  
Edge Computing ◽  
Traffic Density ◽  
The Road ◽  
Main Challenge ◽  
Total Latency ◽  
Hoc Networks ◽  
The Internet Of Things

Vehicular ad hoc networks (VANETs) are a recent class of peer-to-peer wireless networks that are used to organize the communication and interaction between cars (V2V), between cars and infrastructure (V2I), and between cars and other types of nodes (V2X). These networks are based on the dedicated short-range communication (DSRC) IEEE 802.11 standards and are mainly intended to organize the exchange of various types of messages, mainly emergency ones, to prevent road accidents, alert when a road accident occurs, or control the priority of the roadway. Initially, it was assumed that cars would only interact with each other, but later, with the advent of the concept of the Internet of things (IoT), interactions with surrounding devices became a demand. However, there are many challenges associated with the interaction of vehicles and the interaction with the road infrastructure. Among the main challenge is the high density and the dramatic increase of the vehicles’ traffic. To this end, this work provides a novel system based on mobile edge computing (MEC) to solve the problem of high traffic density and provides and offloading path to vehicle’s traffic. The proposed system also reduces the total latency of data communicated between vehicles and stationary roadside units (RSUs). Moreover, a latency-aware offloading algorithm is developed for managing and controlling data offloading from vehicles to edge servers. The system was simulated over a reliable environment for performance evaluation, and a real experiment was conducted to validate the proposed system and the developed offloading method.

scholarly journals A Study on Vehicle Connectivity for VANETs Adopting Beamforming Antenna Array

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Liu Yang ◽  
Weidong Xiang ◽  
Guoxin Zheng
Keyword(s):  
Antenna Array ◽  
Analytical Study ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Mobility Model ◽  
Traffic Density ◽  
Erlang Distribution ◽  
Time Headway ◽  
Connectivity Probability ◽  
Hoc Networks

An analytical mobility model based on Erlang distribution is introduced to portray sparse and dense traffic scenarios in the distributions of time headway. Upon the mobility model, the connectivity probability is then derived in two-way highway when adopting store-forward strategy. Moreover, path losses with and without beamforming antenna array are compared to further study the connectivity under different traffic density scenarios. Meanwhile, the effectiveness of beamforming technology in Vehicular Ad hoc Networks (VANETs) is investigated and concluded through analytical study and simulations.

scholarly journals Improved Dual-Protected Ring Signature for Security and Privacy of Vehicular Communications in Vehicular Ad-Hoc Networks

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 20209-20220 ◽  
Author(s):  
Yi Han ◽  
Nuo-Nuo Xue ◽  
Bi-Yao Wang ◽  
Qi Zhang ◽  
Chun-Lei Liu ◽  
...  
Keyword(s):  
Ad Hoc Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Security And Privacy ◽  
Vehicular Communications ◽  
Ring Signature ◽  
Hoc Networks
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