A realistic analytical model of IEEE 802.11p for Wireless Access in Vehicular Networks

2014 ◽  
Author(s):  
Yamen Y. Nasrallah ◽  
Irfan Al-Anbagi ◽  
Hussein T. Mouftah
Keyword(s):  
Analytical Model ◽  
Vehicular Networks ◽  
Wireless Access ◽  
Ieee 802.11P

scholarly journals A Simulation-Based Analysis of the Loss Process of Broadcast Packets in WAVE Vehicular Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Salvador Gonzalez ◽  
Victor Ramos
Keyword(s):  
Analytical Model ◽  
Vehicular Networks ◽  
Loss Rate ◽  
Traffic Load ◽  
Analytical Models ◽  
Ieee 802.11P ◽  
Control Channel ◽  
Channel Switching ◽  
Loss Process ◽  
Hidden Terminal

The IEEE 802.11p standard operates with the WAVE (Wireless Access in Vehicular Environments) system in vehicular ad hoc networks (VANETs). The broadcast process is used to send messages for safety and non-safety applications. A previous work on broadcast packets over the control channel proposes an analytical model to study the loss process. Even if such work does not consider all of the phenomena affecting the operation of vehicular networks, we can obtain a very good approximation of the performance that VANETs may exhibit. Regardless of its importance, this subject has been barely studied. Moreover, there is in the literature only a couple of contributions on this subject, being both analytical models. Therefore, we present in this paper an analysis of the loss process of broadcast packets on the control channel of VANETs over different scenarios. First, we consider a typical two-way scenario and then we analyze a scenario with intersections, both for different vehicle densities. We conduct a campaign of extensive simulations with the NS-3 simulator to study the average loss rate of broadcast packets, and then we compare our results with an analytical model proposed by Campolo et al. We prove the relationship among the contention window, the packet size, and the number of vehicles with the loss rate, including losses caused by noise, collisions, hidden terminal, and channel switching. Thus, we analyze the loss process validating the results obtained by Campolo et al. We find that there are additional factors affecting the loss rate, which cannot be captured with the analytical model. One key finding in this work is that the loss rate due to channel switching differs between both approaches. Also, we find bounds on the use of the control channel, with the loss rate and the traffic load in the network as parameters.

scholarly journals The Use of Meta-Surfaces in Vehicular Networks

2020 ◽  
Vol 9 (1) ◽  
pp. 15 ◽  
Author(s):  
Barbara M. Masini ◽  
Cristiano M. Silva ◽  
Ali Balador
Keyword(s):  
Vehicular Networks ◽  
Wireless Access ◽  
Collision Probability ◽  
Ieee 802.11P ◽  
New Paradigm ◽  
Cooperative Driving ◽  
Road Users ◽  
Preliminary Model ◽  
Vulnerable Road Users ◽  
Potential Impact

Mobility as a service is becoming a new paradigm in the direction of travel planning on the basis of the best service offered by the travelled roads. Hence, the environment in which people move will become smarter and more and more connected to grant services along the whole path. This opens new challenges related not only to the on board connectivity and wireless access technologies, but also on the reliability and efficiency of the surrounding environment. In this context, reconfigurable meta-surfaces play a crucial role, since they can be used to coat buildings, vehicles or any other suitable surfaces and let the environment become an active part of the communication system by opportunistically redirecting (i.e., reflecting, without generating new waves) signals to the target receivers. The objective of this paper is to highlight the limits of current wireless access technologies for vehicular scenarios and to discuss the potential impact of a smart environment made of reconfigurable meta-surfaces on some next generation vehicular use cases, such as cooperative driving and vulnerable road users (VRUs) detection. In addition, a preliminary model is presented to derive, in a simplified way, the performance of an IEEE 802.11p network in terms of collision probability. Even if analytical and based on simplified assumptions, this model has been validated through simulations and allows to compare the performance of the network with and without reconfigurable meta-surfaces.

scholarly journals A Cooperative Communication Protocol for QoS Provisioning in IEEE 802.11p/Wave Vehicular Networks

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3622 ◽  
Author(s):  
Jin-Woo Kim ◽  
Jae-Wan Kim ◽  
Dong-Keun Jeon
Keyword(s):  
Cooperative Communication ◽  
Vehicular Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Communication Protocol ◽  
Ieee 802.11P ◽  
The Road ◽  
Free Data ◽  
On The Road ◽  
Hoc Networks

Vehicular ad hoc networks (VANETs) provide information and entertainment to drivers for safe and enjoyable driving. Wireless Access in Vehicular Environments (WAVE) is designed for VANETs to provide services efficiently. In particular, infotainment services are crucial to leverage market penetration and deployment costs of the WAVE standard. However, a low presence of infrastructure results in a shadow zone on the road and a link disconnection. The link disconnection is an obstacle to providing safety and infotainment services and becomes an obstacle to the deployment of the WAVE standard. In this paper, we propose a cooperative communication protocol to reduce performance degradation due to frequent link disconnection in the road environment. The proposed protocol provides contention-free data delivery by the coordination of roadside units (RSUs) and can provide the network QoS. The proposed protocol is shown to enhance throughput and delay through the simulation.

Overhauling ns-2 PHY/MAC simulations for IEEE 802.11p/WAVE vehicular networks

2012 ◽  
Author(s):  
Claudia Campolo ◽  
Hector Agustin Cozzetti ◽  
Antonella Molinaro ◽  
Riccardo M. Scopigno
Keyword(s):  
Vehicular Networks ◽  
Ieee 802.11P

scholarly journals SDN-based Handover Scheme in Cellular/IEEE 802.11p Hybrid Vehicular Networks

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1082 ◽  
Author(s):  
Ran Duo ◽  
Celimuge Wu ◽  
Tsutomu Yoshinaga ◽  
Jiefang Zhang ◽  
Yusheng Ji
Keyword(s):  
Network Topology ◽  
Network Performance ◽  
Vehicular Networks ◽  
Ieee 802.11P ◽  
Centralized Control ◽  
Topology Changes ◽  
Dynamic Topology ◽  
Stable Transmission ◽  
Transmission Layer ◽  
Handover Scheme

With the arrival of 5G, the wireless network will be provided with abundant spectrum resources, massive data transmissions and low latency communications, which makes Vehicle-to-Everything applications possible. However, VANETs always accompany with frequent network topology changes due to the highly mobile feature of vehicles. As a result, the network performance will be affected by the frequent handover. In this paper, a seamless handover scheme is proposed where the Software-Defined Networking (SDN) and Mobile Edge Computing (MEC) technologies are employed to adapt to the dynamic topology change in VANETs. The introduction of SDN provides a global view of network topology and centralized control, which enables a stable transmission layer connection when a handover takes place, so that the upper layer performance is not influenced by the network changes. By employing MEC server, the data are cached in advance before a handover happens, so that the vehicle can restore normal communication faster. In order to confirm the superiority of our proposal, computer simulations are conducted from different aspects. The results show that our proposal can significantly improve the network performance when a handover happens.

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