CARS: Context-Aware Rate Selection for vehicular networks

Shankar, Pravin; Nadeem, Tamer; Rosca, Justinian; Iftode, Liviu

doi:10.1109/icnp.2008.4697019

Cited by 80 publications

(60 citation statements)

References 17 publications

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“…Note that the 802.11p physical layer offers different bitrates, ranging from 3 to 27 Mbps, from which OBU devices can choose [26]. Therefore, when two vehicles are within the transmission range, e.g., 300 meters, they can exchange bundles [2].…”

Section: B Node Modelmentioning

confidence: 99%

Pi: A practical incentive protocol for delay tolerant networks

Lin

Zhu

et al. 2010

IEEE Trans. Wireless Commun.

184

111

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Abstract-Delay Tolerant Networks (DTNs) are a class of networks characterized by lack of guaranteed connectivity, typically low frequency of encounters between DTN nodes and long propagation delays within the network. As a result, the message propagation process in DTNs follows a store-carryand-forward manner, and the in-transit bundle messages can be opportunistically routed towards the destinations through intermittent connections under the hypothesis that each individual DTN node is willing to help with forwarding. Unfortunately, there may exist some selfish nodes, especially in a cooperative network like DTN, and the presence of selfish DTN nodes could cause catastrophic damage to any well designed opportunistic routing scheme and jeopardize the whole network. In this paper, to address the selfishness problem in DTNs, we propose a practical incentive protocol, called Pi, such that when a source node sends a bundle message, it also attaches some incentive on the bundle, which is not only attractive but also fair to all participating DTN nodes. With the fair incentive, the selfish DTN nodes could be stimulated to help with forwarding bundles to achieve better packet delivery performance. In addition, the proposed Pi protocol can also thwart various attacks, which could be launched by selfish DTN nodes, such as free ride attack, layer removing and adding attacks. Extensive simulation results demonstrate the effectiveness of the proposed Pi protocol in terms of high delivery ratio and lower average delay.Index Terms-Delay tolerant networks, selfish node, fairness, practical incentive.

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Section: B Node Modelmentioning

confidence: 99%

Pi: A practical incentive protocol for delay tolerant networks

Lin

Zhu

et al. 2010

IEEE Trans. Wireless Commun.

184

111

View full text Add to dashboard Cite

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“…The work of Shankar et al [47] and Wang et al [48] proposed transmit rate control techniques to improve the quality of unicast communication links in the VANET. The former optimized the achievable goodput over a specific unicast link, while the latter achieved maximal energy efficiency.…”

Section: Transmit Rate Controlmentioning

confidence: 99%

SDDV: scalable data dissemination in vehicular ad hoc networks

Vandenberghe

Cappelle

Moerman

et al. 2014

J Wireless Com Network

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An important challenge in the domain of vehicular ad hoc networks (VANET) is the scalability of data dissemination. Under dense traffic conditions, the large number of communicating vehicles can easily result in a congested wireless channel. In that situation, delays and packet losses increase to a level where the VANET cannot be applied for road safety applications anymore. This paper introduces scalable data dissemination in vehicular ad hoc networks (SDDV), a holistic solution to this problem. It is composed of several techniques spread across the different layers of the protocol stack. Simulation results are presented that illustrate the severity of the scalability problem when applying common state-of-the-art techniques and parameters. Starting from such a baseline solution, optimization techniques are gradually added to SDDV until the scalability problem is entirely solved. Besides the performance evaluation based on simulations, the paper ends with an evaluation of the final SDDV configuration on real hardware. Experiments including 110 nodes are performed on the iMinds w-iLab.t wireless lab. The results of these experiments confirm the results obtained in the corresponding simulations.

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“…In vehicular networks, each vehicle already possesses context information about the environment, in the form of the location and speed of itself and its neighbours [9]. Knowledge about the environment is often gained via a beaconing system.…”

Section: Beaconing: Neighbours Status and Local Traffic Densitymentioning

confidence: 99%

Cross-layer transmit power and beacon rate adaptation for VANETs

Frigau

2013

Proceedings of the Third ACM International Symposium on Design and Analysis of Intelligent Vehicular Networks and Applications

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The key benefit of VANETs comes in the form of safety applications. Broadcast is the predominant form of communication for safety messages. However, due to the fast changes occurring in the network topology (sparse, dense, congested), vehicles within a VANET may face many disturbances such as collisions which can cause performance degradations. Thus it becomes hard to maintain an efficient channel utilization and so maximize the network capacity. In this paper, the idea is to take into account the dynamically changing topology of a VANET (local traffic density) and have each vehicle able to dynamically adapt its PHY QoSparameter (Transmit Power) according to its fast changing channel conditions, network load, and link quantities of upper-layers. The proposed mechanism, called Transmit Power Adaptation (TPA) relies on channel estimate at PHY layer and uses feedback from an adaptive beaconing system (also presented) which builds the local view of a vehicle at the network layer. We have evaluated the performance of TPA through simulation with ns-3 simulator. Results show that TPA clearly outperforms the default 802.11 broadcasting mechanism in terms of network capacity. TPA also outperforms a similar adaptive technique not based on channel estimate in terms of network capacity for three scenarios.

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CARS: Context-Aware Rate Selection for vehicular networks

Cited by 80 publications

References 17 publications

Pi: A practical incentive protocol for delay tolerant networks

Pi: A practical incentive protocol for delay tolerant networks

SDDV: scalable data dissemination in vehicular ad hoc networks

Cross-layer transmit power and beacon rate adaptation for VANETs

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