229 research outputs found
VACaMobil: VANET Car Mobility Manager for OMNeT++
©2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.The performance of communication protocols in
vehicular networks highly depends on the mobility pattern.
Therefore, one of the most important issues when simulating this
kind of protocols is how to properly model vehicular mobility.
In this paper we present VACaMobil, a VANET Car Mobility
Manager for the OMNeT++ simulator which allows researchers
to completely define vehicular mobility by setting the desired
average number of vehicles along with its upper and lower
bounds. We compare VACaMobil against other common methods
employed to generate vehicular mobility. Results clearly show the
advantages of the VACaMobil tool when distributing vehicles in
a real scenario, becoming one of the best mobility generators to
evaluate the performance of different communication protocols
and algorithms in VANET environments.This work was partially supported by the Ministerio de Economía y Competitividad, Spain, under Grants TIN2011-27543-C03-01 and BES-2012-052673, and by the Ministerio de Educación, Spain, under the FPU program, AP2010-4397, AP2009-2415.Báguena Albaladejo, M.; Tornell, SM.; Torres Cortés, Á.; Tavares De Araujo Cesariny Calafate, CM.; Cano Escribá, JC.; Manzoni, P. (2013). VACaMobil: VANET Car Mobility Manager for OMNeT++. IEEE. https://doi.org/10.1109/ICCW.2013.6649393
A vehicle-to-infrastructure communication based algorithm for urban traffic control
We present in this paper a new algorithm for urban traffic light control with
mixed traffic (communicating and non communicating vehicles) and mixed
infrastructure (equipped and unequipped junctions). We call equipped junction
here a junction with a traffic light signal (TLS) controlled by a road side
unit (RSU). On such a junction, the RSU manifests its connectedness to equipped
vehicles by broadcasting its communication address and geographical
coordinates. The RSU builds a map of connected vehicles approaching and leaving
the junction. The algorithm allows the RSU to select a traffic phase, based on
the built map. The selected traffic phase is applied by the TLS; and both
equipped and unequipped vehicles must respect it. The traffic management is in
feedback on the traffic demand of communicating vehicles. We simulated the
vehicular traffic as well as the communications. The two simulations are
combined in a closed loop with visualization and monitoring interfaces. Several
indicators on vehicular traffic (mean travel time, ended vehicles) and IEEE
802.11p communication performances (end-to-end delay, throughput) are derived
and illustrated in three dimension maps. We then extended the traffic control
to a urban road network where we also varied the number of equipped junctions.
Other indicators are shown for road traffic performances in the road network
case, where high gains are experienced in the simulation results.Comment: 6 page
Simulating Cellular Communications in Vehicular Networks: Making SimuLTE Interoperable with Veins
The evolution of cellular technologies toward 5G progressively enables
efficient and ubiquitous communications in an increasing number of fields.
Among these, vehicular networks are being considered as one of the most
promising and challenging applications, requiring support for communications in
high-speed mobility and delay-constrained information exchange in proximity. In
this context, simulation frameworks under the OMNeT++ umbrella are already
available: SimuLTE and Veins for cellular and vehicular systems, respectively.
In this paper, we describe the modifications that make SimuLTE interoperable
with Veins and INET, which leverage the OMNeT++ paradigm, and allow us to
achieve our goal without any modification to either of the latter two. We
discuss the limitations of the previous solution, namely VeinsLTE, which
integrates all three in a single framework, thus preventing independent
evolution and upgrades of each building block.Comment: Published in: A. Foerster, A. Udugama, A. Koensgen, A. Virdis, M.
Kirsche (Eds.), Proc. of the 4th OMNeT++ Community Summit, University of
Bremen - Germany - September 7-8, 201
Car-to-Cloud Communication Traffic Analysis Based on the Common Vehicle Information Model
Although connectivity services have been introduced already today in many of
the most recent car models, the potential of vehicles serving as highly mobile
sensor platform in the Internet of Things (IoT) has not been sufficiently
exploited yet. The European AutoMat project has therefore defined an open
Common Vehicle Information Model (CVIM) in combination with a cross-industry,
cloud-based big data marketplace. Thereby, vehicle sensor data can be leveraged
for the design of entirely new services even beyond traffic-related
applications (such as localized weather forecasts). This paper focuses on the
prediction of the achievable data rate making use of an analytical model based
on empirical measurements. For an in-depth analysis, the CVIM has been
integrated in a vehicle traffic simulator to produce CVIM-complaint data
streams as a result of the individual behavior of each vehicle (speed, brake
activity, steering activity, etc.). In a next step, a simulation of vehicle
traffic in a realistically modeled, large-area street network has been used in
combination with a cellular Long Term Evolution (LTE) network to determine the
cumulated amount of data produced within each network cell. As a result, a new
car-to-cloud communication traffic model has been derived, which quantifies the
data rate of aggregated car-to-cloud data producible by vehicles depending on
the current traffic situations (free flow and traffic jam). The results provide
a reference for network planning and resource scheduling for car-to-cloud type
services in the context of smart cities
Exploiting Map Topology Knowledge for Context-predictive Multi-interface Car-to-cloud Communication
While the automotive industry is currently facing a contest among different
communication technologies and paradigms about predominance in the connected
vehicles sector, the diversity of the various application requirements makes it
unlikely that a single technology will be able to fulfill all given demands.
Instead, the joint usage of multiple communication technologies seems to be a
promising candidate that allows benefiting from characteristical strengths
(e.g., using low latency direct communication for safety-related messaging).
Consequently, dynamic network interface selection has become a field of
scientific interest. In this paper, we present a cross-layer approach for
context-aware transmission of vehicular sensor data that exploits mobility
control knowledge for scheduling the transmission time with respect to the
anticipated channel conditions for the corresponding communication technology.
The proposed multi-interface transmission scheme is evaluated in a
comprehensive simulation study, where it is able to achieve significant
improvements in data rate and reliability
A Tool Offering Steady-State Simulations for VANETs
[EN] Without realistic vehicle mobility patterns, the evaluation of communication protocols in vehicular networks is compromised. Moreover, in order to ensure repeatability and fairness in vehicular simulations, researchers require simulation tools that allow them to have a complete control of simulations. In this paper we present VACaMobil, a Mobility Manager for the OMNeT++ simulator which offers a way to create complex scenarios with realistic vehicular mobility by allowing to define the desired average number of vehicles, along with its upper and lower bounds, which are maintained throughout the simulation. We compare VACaMobil against other commonly used methods which also generate and manage vehicular mobility. Results expose some flaws of those basic tools, and shows that VACaMobil behaves significantly better. The harmful impact on communication protocols when using common tools is also quantified, revealing VACaMobil as a necessity for current research.This work was partially supported by the Ministerio de Economía y Competitividad, Spain, under Grants TIN2011-27543- C03-01 and BES-2012-052673, by the Ministerio de Educación, Spain, under the FPU program, AP2010-4397, AP2009-2415, and by the Universitat Politècnica de València under project ABATIS (PAID-05-12).Báguena Albaladejo, M.; Martínez Tornell, S.; Torres Cortés, Á.; Calafate, CT.; Cano Escribá, JC.; Manzoni, P. (2013). A Tool Offering Steady-State Simulations for VANETs. Recent Patents on Telecommunications. 2(2):102-112. http://hdl.handle.net/10251/40658S1021122
StreetlightSim: a simulation environment to evaluate networked and adaptive street lighting
Sustaining the operation of street lights incurs substantial financial and environmental cost. Consequently, adaptive lighting systems have been proposed incorporating ad-hoc networking, sensing, and data processing, in order to better manage the street lights and their energy demands. Evaluating the efficiency and effectiveness of these complex systems requires the modelling of vehicles, road networks, algorithms, and communication systems, yet tools are not available to permit this. This paper proposes StreetlightSim, a novel simulation environment combining OMNeT++ and SUMO tools to model both traffic patterns and adaptive networked street lights. StreetlightSim’s models are illustrated through the simulation of a simple example, and a more complex scenario is used to show the potential of the tool and the obtainable results. StreetlightSim has been made open-source, and hence is available to the community
A Co-Simulation Study to Assess the Impacts of Connected and Autonomous Vehicles on Traffic Flow Stability during Hurricane Evacuation
Hurricane evacuation has become a major problem for the coastal residents of
the United States. Devastating hurricanes have threatened the lives and
infrastructure of coastal communities and caused billions of dollars in damage.
There is a need for better traffic management strategies to improve the safety
and mobility of evacuation traffic. In this study hurricane evacuation traffic
was simulated using SUMO a microscopic traffic simulation model. The effects of
Connected and Autonomous Vehicles (CAVs) and Autonomous Vehicles (AVs) were
evaluated using two approaches. (i) Using the state-of-the-art car-following
models available in SUMO and (ii) a co-simulation study by integrating the
microscopic traffic simulation model with a separate communication simulator to
find the realistic effect of CAVs on evacuation traffic. A road network of I-75
in Florida was created to represent real-world evacuation traffic observed in
Hurricane Irma s evacuation periods. Simulation experiments were performed by
creating mixed traffic scenarios with 25, 50, 75 and 100 percentages of
different vehicle technologies including CAVs or AVs and human-driven vehicles.
HDV Simulation results suggest that the CACC car-following model, implemented
in SUMO and commonly used in the literature to represent CAVs, produces highly
unstable results On the other hand the ACC car following model, used to
represent AVs, produces better and more stable results. However, in a
co-simulation study, to evaluate the effect of CAVs in the same evacuation
traffic scenario, results indicate that with 25 percentage of CAVs the number
of potential collisions decrease up to 42.5 percentage
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