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The IEEE 802.11p standard drafted to support wireless access in vehicular environments (WAVE) or vehicular ad hoc network (VANET) which uses Enhanced Distributed Channel Access (EDCA) mechanism for the contention-based prioritized Quality of Service (QoS) at the MAC layer. The EDCA mechanism defines four access categories (ACs). Each AC queue works as an independent DCF station (STA) with Enhanced...
The increasing demand of diverse vehicular network oriented applications (both safety and non-safety related services would undoubtedly lead to shortage of spectral resource challenge for V2V communication networks. In order to resolve this issue, a novel Adaptive CR Enabled Vehicular NETwork (ACREVNET) framework is proposed in this paper. To avoid heavy overhead usually incurred during spectrum sensing,...
Middleware is the software layer that lies between applications and the devices, which make diverse vehicles exchange information transparently in Vehicular Ad Hoc Network (VANET). And the useful information can be seen as services which include web surfing, coordinated braking, runway incursion prevention, adaptive traffic control and many others. In this paper, we focus on discovering the optimal...
Recently, Visible Light Communication (VLC) has been proposed as a low-cost and low-complexity technology for vehicular communications. In this paper, we propose a vehicular network architecture that enables wireless Infrastructure-to-Vehicle (I2V) and Vehicle-to-Vehicle (V2V) communication to provide value added services. The wireless communication technique chosen to enable the data transmission...
Vehicular-to-Vehicular (V2V) and Vehicular-to-Infrastructure (V2I) communications in Vehicular Ad hoc Network (VANET) environment rely mainly on Medium Access Control (MAC) to minimize the delay and maintain reliable access to the communication medium. IEEE 802.11p standard is developed to achieve these goals. However its performance deteriorates drastically in large networks due to the high level...
Enabling vehicles to connect to the best available communication medium in a heterogeneous network is of high importance to preserve good quality of service (QoS), however a hard task to handle. The ISO-CALM (Communications Access for Land Mobiles) offers the possibility to manage multiple communication interfaces with a promising architecture, but without any specific implementation. Several techniques...
Recent years have seen a growing interest in Vehicular Ad hoc Networks (VANETs) and their benefits to the development of intelligent transportation systems (ITS). With the deployment of multimedia services over VANETs, there is a need to develop new approaches to insure higher level of quality of services (QoS) for real time applications, and integrate QoS into routing protocols. However, in VANET...
Vehicular Ad-hoc Networks (VANETs) which nowadays showed distinct researches around the globe. Advancements in wireless networks globally, which gave a new dimension to researchers. This paper reviewed the basic concepts of VANET and clustering. It presented various types of clustering which could be implemented for the efficient running of VANET. Using static clustering dividing geographical city...
Vehicular Ad Hoc Network (VANET) is a subclass of Mobile Ad Hoc Network (MANET). QoS routing protocols are fundamental part of VANETs that aim to provide services with guaranteed quality. Existing routing protocols of MANET can be applied to VANETs as well but they do not perform well under the dynamic conditions of VANETs such as, fast moving nodes and frequent disconnections in the network. In this...
There are several kinds of envisioned vehicular applications: video delivery, accidents detection, dissemination of traffic announcements, and so forth. Such applications demand minimal (and possibly distinct) QoS guarantees that must couple the vehicular network. Given that vehicular networks will soon become reality, we demand strategies for planning and managing such networks. In this work we propose...
Achieving high Quality of Service (QoS) in routing is one of the major issues to be tackled in VANET. This is primarily due to the interference among vehicles and the objects present within the transmission environment. This also causes rapid degradation in transmitted signal and affects the overall system throughput. As a result, the system performance parameters such as delay, packet drop ratio...
The Quality of Service (QoS) on the traffic environment with high mobility, dynamic topology, and change trajectory is one of the challenges in the use of Vehicular Ad-Hoc Networks (VANET) Routing Protocols. PUMA routing protocol presents multicast work mechanism based on shared mesh topology. It always dynamically adapt to VANET traffic conditions. In this paper, we evaluated the PUMA routing protocol...
Offloading a part of cellular traffic through other kinds of networks, such as Wi-Fi hotspots and femtoCells represents an interesting solution for operators to cope with the high user traffic demand increase. In this paper, we propose to use the Vehicular ad hoc Networks (VANETs) for the same purpose. We present an analytical study based on an optimization problem formulation to evaluate the potential...
VANETs (Vehicular ad-hoc network) are characterized by a very dynamic topology with partial infrastructure support, patterned mobility, and mobile nodes with sufficient amount of resources, intermittent connectivity and varied channel behavior. For this purpose, we always use the location information that vehicles share among them through repetitive messages that are transmitted in the VANET system...
Vehicle Ad-Hoc Network (VANET) applications are proposed in the literature to provide a certain degree of Quality of Service (QoS) to vehicles. Nevertheless, VANET experiences high mobility, dynamic topology and propagation irregularity. These characteristics make the QoS requirements in VANET a challenging issue. In this paper, we propose a novel VANET architecture along with quality of service metrics...
In wireless ad hoc networks such as Vehicular Ad Hoc Networks (VANET), limited coverage of WiFi and high mobility of the nodes generate frequent topology changes. Therefore Quality of Service (QoS) support becomes an essential aspect. In this work we have identified the need for QoS improvement in VANETs. Survey of related work depicts that, an efficient routing strategy plays a crucial role, to improve...
In the past, many researchers depend highly on various real life environmental short coverage area networks to analyze the performance of various routing algorithms. Recent ever-increasing interest in vehicular ad hoc network communication (VAC) necessitates vehicular movement performance study via different mobility pattern simulation. Unlike many other works, we present a study on the performance...
In this paper, we propose a cooperative traffic transmission algorithm in a joint cellular and mobile ad hoc hybrid network architecture. The mobile ad hoc network is based on IEEE 802.11p standard. The focus of this paper is on defining an algorithm aiming to select the appropriate gateway for a given source vehicle under the scope of V2I communications. In this work, we consider the LTE Advanced...
Road maps are important for several applications in vehicular networks. As a consequence, an updated map is essential for a proper behavior of such applications. In this paper, we focus on a map update application based on an infrastructure-to-vehicle communication with a high mobility. In order to understand the application's behavior, we analyze different performance criteria: System Goodput, Packet...
Vehicular networks are meant to exist wherever the road will take them. This includes small towns, rural highways, suburbs, downtown urban centers, and urban highways. The density of vehicles varies greatly across these environments. This work looks at the effects of implementing Quality of Service (QoS) as well as a relatively similar method that inserts stochastic delays in pseudonym (PN) transmission...
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