Towards realistic vehicular network simulation models

Baguena, Miguel; Calafate, Carlos T.; Cano, Juan-Carlos; Manzoni, Pietro

doi:10.1109/wd.2012.6402805

Cited by 19 publications

(13 citation statements)

References 5 publications

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“…Instead, it requires tuning different parameters such as the frequency or the level of attenuation with distance. To achieve the highest degree of similarity with reality we adopted the parameters proposed by Báguena et al [24]. For a more realistic mobility behaviour that includes vehicle overtaking we defined a set including different vehicle types with an associated probability of occurrence.…”

Section: Scenario and Methodologymentioning

confidence: 99%

Evaluation of flooding schemes for real-time video transmission in VANETs

et al. 2015

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Long-distance real-time video flooding over VANETs is a challenging topic due to the dynamic nature of vehicular networks. Real-time video transmission has high requirements in terms of bandwidth and delay, while VANETs are characterized by very limited radio resources and high mobility.Our objective is to compare ten different flooding schemes specially designed for this task, selecting the best one in terms of packet arrival ratio and PSNR. Additionally, we propose ACDB, an improved flooding scheme to cope with variable vehicle density situations.Furthermore, to ensure a good behaviour under any type of circumstances, we also study the impact of GPS drift on these schemes. Simulation results show that long-distance real-time video flooding transmission is feasible under certain vehicle density conditions, and provides enough quality for being used in future applications.

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Section: Scenario and Methodologymentioning

confidence: 99%

Evaluation of flooding schemes for real-time video transmission in VANETs

et al. 2015

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“…Instead, it requires tuning different parameters such as the frequency or the level of attenuation with distance. To achieve a proper level of similarity with reality, we employed the parameters proposed by Báguena et al [14].…”

Section: Simulation Environmentmentioning

confidence: 99%

Evaluating H.265 real-time video flooding quality in highway V2V environments

Torres

Pinol

Calafate

et al. 2014

2014 IEEE Wireless Communications and Networking Conference (WCNC)

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Abstract-Video transmission over VANETs is an extremely difficult task not only due to the high bandwidth requirements, but also due to typical VANET characteristics such as signal attenuation, packet losses, high relative speeds and fast topology changes.In future scenarios, vehicles will provide other vehicles with information about accidents or congestion on the road, and in these cases offering visual information can be a really valuable resource for both drivers and traffic authorities. Hence, achieving an efficient transmission is critical to maximize the user-perceived quality. In this paper we evaluate solutions that combine different flooding techniques, and different video codecs to assess the effectiveness of long-distance real-time video streaming. In particular, we will compare the most effective video coding standard available (H.264) with the upcoming H.265 codec in terms of both frame loss and PSNR.Index Terms-Video streaming, V2V, VANET, flooding, h.264/AVC, h.265/HEVC I. INTRODUCTION Vehicular ad-hoc networks (VANETs) are receiving a lot of attention from vehicle manufacturers since they promote smarter, cleaner, and safer vehicles. In a near future it is expected that vehicular networks will be as extended as mobile phones are nowadays. Vehicles will be equipped with different sensors which can provide useful information to other drivers or traffic authorities. One of the most useful information a vehicle can provide is the live video of an accident situation, not only allowing the emergency services to know in advance the exact status of the accident, but also for other vehicles to decide whether to change their current route.VANETs provide one of the most difficult environments to achieve a good transmission quality since this type of networks involve high relative speeds, which cause short connection times and transmission problems such as the Doppler effect. In addition, bandwidth is typically very limited, thus becoming one of the worst case scenarios for real-time video transmission. With these constraints it is necessary to check whether it is possible to achieve real-time video transmission with current broadcasting techniques, and, if so, evaluate the final quality of the obtained video.The recent approval of the new H.265 video compression standard [1], which intends to replace the widely used and well-known H.264 standard [2], provides a new opportunity

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“…To accurately model real world conditions, we used the propagation model presented in [17], which combines the Nakagami fading model [18] with a visibility model which deals with power losses due to the effect of obstacles.…”

Section: Simulation Environmentmentioning

confidence: 99%

Assessing the effectiveness of DTN techniques under realistic urban environments

Tornell

Calafate

Cano

et al. 2013

38th Annual IEEE Conference on Local Computer Networks

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Abstract-Intelligent Transportation Systems (ITS) require collecting and distributing as much relevant information as possible to provide their services. Such information could also offer new possibilities to various service providers in the wider Smart City context. The distribution of this intelligence is carried out through various vehicular networking strategies, the most flexible of all being Delay Tolerant Networking (DTN). DTN protocols can cope with the problems derived from high mobility and the possibility of high node sparsity. Nevertheless, achieving a fair comparison of DTN solutions in an urban environment is a hard task. In this paper we present a generic DTN model that we use to compare various representative DTN solutions in a metropolitan scenario. We highlight the weak and strong points of each evaluated proposal by also taking into consideration different sending strategies adopted to improve the performance of DTN protocols.

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Towards realistic vehicular network simulation models

Cited by 19 publications

References 5 publications

Evaluation of flooding schemes for real-time video transmission in VANETs

Evaluation of flooding schemes for real-time video transmission in VANETs

Evaluating H.265 real-time video flooding quality in highway V2V environments

Assessing the effectiveness of DTN techniques under realistic urban environments

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