scholarly journals Towards Dynamic Controller Placement in Software Defined Vehicular Networks

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1701 ◽  
Author(s):  
Soufian Toufga ◽  
Slim Abdellatif ◽  
Hamza Tarik Assouane ◽  
Philippe Owezarski ◽  
Thierry Villemur
Keyword(s):  
Vehicular Networks ◽  
Road Traffic ◽  
Node Mobility ◽  
Transportation Services ◽  
Architectural Elements ◽  
Dynamic Controller ◽  
Controller Placement ◽  
Efficient Resource ◽  
Traffic Trace ◽  
Static Approach

The emerging SDVN (Software Defined Vehicular Network) paradigm promises to bring flexibility and efficient resource utilization to vehicular networks, enabling the emergence of novel Intelligent Transportation Services. However, as it was initially designed with wired network in mind, applying the SDN paradigm to a vehicular context faces new challenges related to the peculiar characteristics of this network (high node mobility and node density, and the presence of wireless links). In this paper, we focus on one of the critical architectural elements of SDVN, namely, the SDN Controller Placement, and promote the use of dynamic placement methods that take into account the dynamicity of vehicular networks’ topology. We also describe the different approaches towards a dynamic controller placement and also propose an ILP (Integer Linear Programming) based dynamic placement method that adaptively readjusts the number and placement of controllers according to road traffic fluctuations. The proposed method is evaluated using a realistic traffic trace from Luxembourg City. Simulation results show that our approach outperforms the static approach as proposed in the literature.

scholarly journals Accurate Real-Time Traffic Speed Estimation Using Infrastructure-Free Vehicular Networks

2015 ◽  
Vol 2015 ◽  
pp. 1-19 ◽  
Author(s):  
Zongjian He ◽  
Buyang Cao ◽  
Yan Liu
Keyword(s):  
Real Time ◽  
Large Scale ◽  
Vehicular Networks ◽  
Route Planning ◽  
Speed Estimation ◽  
Traffic Condition ◽  
Real Time Traffic ◽  
Traffic Trace ◽  
Traffic Speed ◽  
Traffic Speed Estimation

Real-time traffic speed is indispensable for many ITS applications, such as traffic-aware route planning and eco-driving advisory system. Existing traffic speed estimation solutions assume vehicles travel along roads using constant speed. However, this assumption does not hold due to traffic dynamicity and can potentially lead to inaccurate estimation in real world. In this paper, we propose a novel in-network traffic speed estimation approach using infrastructure-free vehicular networks. The proposed solution utilizes macroscopic traffic flow model to estimate the traffic condition. The selected model only relies on vehicle density, which is less likely to be affected by the traffic dynamicity. In addition, we also demonstrate an application of the proposed solution in real-time route planning applications. Extensive evaluations using both traffic trace based large scale simulation and testbed based implementation have been performed. The results show that our solution outperforms some existing ones in terms of accuracy and efficiency in traffic-aware route planning applications.

scholarly journals An efficient resource utilization scheme within PMIPv6 protocol for urban vehicular networks

PLoS ONE ◽  
2019 ◽  
Vol 14 (3) ◽  
pp. e0212490
Author(s):  
Safwan M. Ghaleb ◽  
Shamala Subramaniam ◽  
Zuriati Ahmad Zukarnain ◽  
Abdullah Muhammed ◽  
Mukhtar Ghaleb
Keyword(s):  
Resource Utilization ◽  
Vehicular Networks ◽  
Efficient Resource ◽  
Utilization Scheme

scholarly journals A Survey on Fault Tolerance Techniques for Wireless Vehicular Networks

Electronics ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 1358 ◽  
Author(s):  
João Almeida ◽  
João Rufino ◽  
Muhammad Alam ◽  
Joaquim Ferreira
Keyword(s):  
Fault Tolerance ◽  
Intelligent Transportation Systems ◽  
Vehicular Networks ◽  
Road Traffic ◽  
Fault Tolerant ◽  
Human Life ◽  
Transportation Systems ◽  
Vehicular Communications ◽  
Self Driving Cars ◽  
Meta Analyses

Future intelligent transportation systems (ITS) hold the promise of supporting the operation of safety-critical applications, such as cooperative self-driving cars. For that purpose, the communications among vehicles and with the road-side infrastructure will need to fulfil the strict real-time guarantees and challenging dependability requirements. These safety requisites are particularly important in wireless vehicular networks, where road traffic presents several threats to human life. This paper presents a systematic survey on fault tolerance techniques in the area of vehicular communications. The work provides a literature review of publications in journals and conferences proceedings, available through a set of different search databases (IEEE Xplore, Web of Science, Scopus and ScienceDirect). A systematic method, based on the preferred reporting items for systematic reviews and meta-analyses (PRISMA) Statement was conducted in order to identify the relevant papers for this survey. After that, the selected articles were analysed and categorised according to the type of redundancy, corresponding to three main groups (temporal, spatial and information redundancy). Finally, a comparison of the core features among the different solutions is presented, together with a brief discussion regarding the main drawbacks of the existing solutions, as well as the necessary steps to provide an integrated fault-tolerant approach to the future vehicular communications systems.

THE PRODUCTION AND PREDICTION OF TRAFFIC ACCIDENTS

2012 ◽  
Vol 1 (2) ◽  
pp. 157-168
Author(s):  
Yuval Shilony
Keyword(s):  
Traffic Accidents ◽  
Road Traffic ◽  
Quantitative Relationship ◽  
Traffic Density ◽  
Physical Factors ◽  
Marginal Effect ◽  
Prediction Ability ◽  
Transportation Services ◽  
Road Users ◽  
On The Road

Traffic accidents are a painful and costly affliction all over the world. The discussion and debate over the most effective measures to adopt to enhance road safety is often based on folk theories and is not free of private interests and pressures. Road traffic is a complicated system of interactions providing transportation services.  Unfortunately, in conjunction with these services, traffic accidents, an awful public bad, are produced. The purpose of this paper is to study the production relationship, for inter-city transportation, between the physical factors, i.e., highways and vehicles, and traffic accidents. The upshot is prediction ability of accidents in any given road segment, existing or planned. The regretful aspect of roads runs counter to conventional wisdom which, failing to appreciate the quantitative relationship between roads and accidents, often advocates building more and wider roads as the remedy.  The empirically substantiated public bad property of roads, by way of production functions for traffic accidents, is useful for public policy, concerning the investment in highways versus other forms of transportation, such as rail.  They also promote better understanding of traffic accidents and their data and the methodology allows testing hypotheses relating to safety policy. This study sheds light on the enigma of the long-term decline in the probability of death on the road, as observed in many countries, by attributing it to the rising traffic density. The estimation also sheds light on the accident-externality imposed by road users on others. The results suggest that for inter-city roads the risk of fatal and severe accidents is over-internalized by road users as the marginal effect of traffic flow is smaller than the average.

The Role of Roadside Assistance in Vehicular Communication Networks

2012 ◽  
pp. 1-37 ◽  
Author(s):  
George Kadas ◽  
Periklis Chatzimisios
Keyword(s):  
Communication Networks ◽  
Mobile Communications ◽  
Vehicular Networks ◽  
Efficient Solutions ◽  
Node Mobility ◽  
Vehicular Communication ◽  
Communications Networks ◽  
Vehicle To Infrastructure ◽  
Vehicular Communication Networks ◽  
Basic Characteristics

Vehicular Communication Networks is a subcategory of Mobile Communications Networks that has the special characteristics of high node mobility and fast topology changes. In the current chapter, the authors outline the basic characteristics and concepts of vehicular communications and present the standardization and network deployment efforts carried out by the scientific community. In particular, they focus their attention on the vehicle-to-infrastructure component of the network; moreover, the authors specifically investigate security, quality of service, and routing, which constitute three of the most challenging aspects in the field of Vehicular Networks. The authors further examine the ways that infrastructure can provide efficient solutions to the problems that exist for each respective category and review several proposed solutions.

Dynamic controller placement in edge-core software defined networks

2017 ◽  
Author(s):  
Saumya Hegde ◽  
Roshni Ajayghosh ◽  
Shashidhar G. Koolagudi ◽  
Swapan Bhattacharya
Keyword(s):  
Software Defined Networks ◽  
Dynamic Controller ◽  
Controller Placement

A Novel Cost-Effective Controller Placement Scheme for Software-Defined Vehicular Networks

2021 ◽  
pp. 1-1
Author(s):  
Na Lin ◽  
Qi Zhao ◽  
Liang Zhao ◽  
Ammar Hawbani ◽  
Lu Liu ◽  
...  
Keyword(s):  
Vehicular Networks ◽  
Cost Effective ◽  
Controller Placement

scholarly journals A Literature Review on Caching Transient Contents in Vehicular Named Data Networking

Telecom ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 75-92
Author(s):  
Marica Amadeo
Keyword(s):  
Network Performance ◽  
Vehicular Networks ◽  
Road Traffic ◽  
Named Data Networking ◽  
Data Packets ◽  
Large Sets ◽  
Research Perspectives ◽  
Static Data ◽  
Parking Lot ◽  
Data Networking

Vehicular Named Data Networking (VNDN) is a revolutionary information-centric architecture specifically conceived for vehicular networks and characterized by name-based forwarding and in-network caching. So far, a variety of caching schemes have been proposed for VNDN that work in presence of static Data packets, like traditional Internet contents. However, with the advent of Internet of Things (IoT) and Internet of Vehicles (IoV) applications, large sets of vehicular contents are expected to be transient, i.e., they are characterized by a limited lifetime and become invalid after the latter expires. This is the case of information related to road traffic or parking lot availability, which can change after a few minutes—or even after a few seconds—it has been generated at the source. The transiency of contents may highly influence the network performance, including the gain of in-network caching. Therefore, in this paper, we consider the dissemination of transient contents in vehicular networks and its effects on VNDN caching. By providing a detailed review of related work, we identify the main challenges and objectives when caching transient contents, e.g., to avoid cache inconsistency, to minimize the Age of Information (AoI) and the retrieval latency, and the main strategies to fulfill them. We scan the existing caching and replacement policies specifically designed for transient contents in VNDN and, finally, we outline interesting research perspectives.

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