Performance evaluation of cooperative strategies for Vehicular Delay‐Tolerant Networks

Dias, Joao A.; Rodrigues, Joel J. P. C.; Zhou, Liang

doi:10.1002/ett.2683

Cited by 13 publications

(12 citation statements)

References 31 publications

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“…Several preliminary studies to enforce cooperation in VDTNs were already conducted [6,7,20]. Most of them try to understand the impact of different cooperative strategies in the overall performance of this type of architecture.…”

Section: Related Workmentioning

confidence: 99%

“…It also follows a hybrid approach inspired on GeOpps [29] and the binary version of Spray and Wait. GeoSpray and Spray and Wait protocols were chosen because they were the best performing protocols in previous studies focused on cooperation in VDTNs [6].…”

Section: Performance Metrics and Routing Protocolsmentioning

confidence: 99%

“…Previous studies on this topic [6] show that enforcing cooperation in VDTNs is not an easy task. For example, it is important to stimulate nodes to cooperate in order to create an optimal cooperative system that provides quality of service (QoS) to increase the overall network performance without compromising or deteriorating data.…”

Section: Introductionmentioning

confidence: 99%

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Performance evaluation of a cooperative reputation system for vehicular delay-tolerant networks

Dias

Rodrigues

Shu

et al. 2014

J Wireless Com Network

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In the last decade, both scientific community and automotive industry enabled communications among vehicles in different kinds of scenarios proposing different vehicular architectures. Vehicular delay-tolerant networks (VDTNs) were proposed as a solution to overcome some of the issues found in other vehicular architectures, namely, in dispersed regions and emergency scenarios. Most of these issues arise from the unique characteristics of vehicular networks. Contrary to delay-tolerant networks (DTNs), VDTNs place the bundle layer under the network layer in order to simplify the layered architecture and enable communications in sparse regions characterized by long propagation delays, high error rates, and short contact durations. However, such characteristics turn contacts very important in order to exchange as much information as possible between nodes at every contact opportunity. One way to accomplish this goal is to enforce cooperation between network nodes. To promote cooperation among nodes, it is important that nodes share their own resources to deliver messages from others. This can be a very difficult task, if selfish nodes affect the performance of cooperative nodes. This paper studies the performance of a cooperative reputation system that detects, identify, and avoid communications with selfish nodes. Two scenarios were considered across all the experiments enforcing three different routing protocols (First Contact, Spray and Wait, and GeoSpray). For both scenarios, it was shown that reputation mechanisms that punish aggressively selfish nodes contribute to increase the overall network performance.

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Section: Related Workmentioning

confidence: 99%

Section: Performance Metrics and Routing Protocolsmentioning

confidence: 99%

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Performance evaluation of a cooperative reputation system for vehicular delay-tolerant networks

Dias

Rodrigues

Shu

et al. 2014

J Wireless Com Network

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“…The second subsection focuses on the performance of the Spray and Wait routing protocol [14], while the last subsection focuses on the performance of a VDTN routing protocol, called GeoSpray [15]. Both protocols were chosen because they were the best performing protocols in previous studies focused on cooperation in VDTNs [5]. Finally, the last subsection presents a discussion about the obtained results.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…One of these open issues is cooperation between network nodes. Previous studies on this topic [5] show that enforcing cooperation in VDTNs is not an easy task. For example it is important to stimulate nodes to cooperate in order to create an optimal cooperative system that provide quality of service (QoS) to increase the overall network performance without comprising or deteriorating nodes data.…”

Section: Introductionmentioning

confidence: 99%

A reputation system to identify and isolate selfish nodes in Vehicular Delay-Tolerant Networks

Dias

Rodrigues

Shu

et al. 2013

2013 13th International Conference on ITS Telecommunications (ITST)

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Vehicular Delay-Tolerant Networks (VDTNs) were proposed as a solution to overcome some issues found in other vehicular technologies. VDTNs assume the bundle layer placement under the network layer. This vehicular architecture can be applied in sparse regions characterized by sparse connectivity, long propagation delays, high error rates, and short contact durations. Although some of the major issues were already solved and several improvements were already achieved, VDTNs still have several issues that should be overcome. One of these issues is related with nodes cooperation and nodes share their own resources to deliver packets from others. This can be a difficult task if selfish nodes affect the performance of cooperative nodes. To detect, identify, and avoid communications with selfish nodes, this paper proposes a reputation system with four different reputation mechanisms and studies their impact on the performance of the network. This reputation system is enforced on two different routing protocols (Spray-and-Wait and GeoSpray). Across all the experiments, it was shown that reputation mechanisms that punish aggressively selfish nodes contribute to an increase of the overall network performance by increase the number of delivery messages and decrease the message average delivery delay.

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A novel contact prediction‐based routing scheme for DTNs

Zhang

Wang

et al. 2014

Trans. Emerging Tel. Tech.

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Delay/disruption tolerant networks (DTNs) make opportunistic communications by utilising the mobility of nodes. The characteristics of high mobility of nodes and high dynamicity of network topology result in an absence of instantaneous end-to-end path from any source to a destination and thus make routing a challenge in DTNs. To deal with this issue, researchers have investigated a variety of routing schemes for DTNs based on the prediction of future contacts, in which node mobility is explored and used. However, the previous works did not consider the instant contact information such as the last contact duration time and the instant separation time since the last contact whilst making routing decisions, leading to less prediction accuracy of future contacts and thus worse routing performance. In this paper, a novel contact predictionbased routing scheme is proposed for DTNs to increase delivery ratio by considering the instant contact information. Specifically, to predict the contact probability of two nodes accurately, the statistical contact information, the instant contact information and the contact transitivity are comprehensively considered. The simulation evaluations show that the proposed contact prediction-based routing substantially improves delivery ratio and reduces delivery latency and delivery overhead compared with traditional DTN routing schemes.

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Performance evaluation of cooperative strategies for Vehicular Delay‐Tolerant Networks

Cited by 13 publications

References 31 publications

Performance evaluation of a cooperative reputation system for vehicular delay-tolerant networks

Performance evaluation of a cooperative reputation system for vehicular delay-tolerant networks

A reputation system to identify and isolate selfish nodes in Vehicular Delay-Tolerant Networks

A novel contact prediction‐based routing scheme for DTNs

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