Improving Vehicular Delay-Tolerant Network Performance with Relay Nodes

Soares, Vasco N. G. J.; Farahmand, Farid; Rodrigues, Joel J. P. C.

doi:10.1109/ngi.2009.5175762

Cited by 35 publications

(21 citation statements)

References 18 publications

(17 reference statements)

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“…The use of MULE [45] nodes, that move data from one place to another, and relay nodes [46], that store data for later delivery to passing by vehicles, can increase the efficiency of inter-vehicle non realtime communications [47]. Projects such as KioskNet [48] were pioneers in showing that the theoretical DTN concepts can be effectively useful in practice, as the movement of vehicles can be exploited to carry data to other locations.…”

Section: Discussionmentioning

confidence: 99%

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From Delay-Tolerant Networks to Vehicular Delay-Tolerant Networks

Pereira

Casaca

Rodrigues

et al. 2012

IEEE Commun. Surv. Tutorials

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209

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Abstract-This paper provides an introductory overview of Vehicular Delay-Tolerant Networks. First, an introduction to Delay-Tolerant Networks and Vehicular Delay-Tolerant Networks is given. Delay-Tolerant schemes and protocols can help in situations where network connectivity is sparse or with large variations in density, or even when there is no end-to-end connectivity by providing a communications solution for non realtime applications. Some special issues like routing are addressed in the paper and an introductory description of applications and the most important projects is given. Finally, some research challenges are discussed and conclusions are detailed.

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Section: Discussionmentioning

confidence: 99%

“…Some interesting new types of nodes in VDTNs are data MULEs (Mobile Ubiquitous LAN Extensions) [45] and stationary relay nodes [46]. Mules are mobile nodes that pick data in one place and drop it in another place.…”

Section: Vehicular Delay-tolerant Networkmentioning

confidence: 99%

From Delay-Tolerant Networks to Vehicular Delay-Tolerant Networks

Pereira

Casaca

Rodrigues

et al. 2012

IEEE Commun. Surv. Tutorials

Self Cite

209

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“…Contrary to the urban scenario, in this scenario, relay nodes' buffer capacity is increased due to the low density of mobile nodes, which results in fewer contact opportunities between network nodes. With this approach, relay nodes can store a larger number of bundles, in order to increase the bundle delivery probability [25]. Bundles are transported between terminal nodes by 40 mobiles nodes, which move along roads with a buffer capacity of 125 MB and a velocity in the range of 30 to 80 km/h.…”

Section: Rural Network Scenariomentioning

confidence: 99%

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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“…With multiple copy schemes a number of packet copies are circulated through many moveable nodes to increase the possibility of delivering the packet to the destination. On the other hand, the work proposed in [19][20][21] is based on the contacts history in order to create a neighborhood Index and then determine the most appropriated route for DTNs. However these schemes provide low packet delay, the main restriction with these schemes is the size overheads and the energy caused by extreme packet broadcasts.…”

Section: Related Workmentioning

confidence: 99%

Delay Tolerant Routing Protocol Modeling for Low Power Wearable Wireless Sensor Networks

Quwaider

Biswas

2012

NPA

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A structural model for packet store-and-forward routing protocols in Wireless Body Area Networks (WBAN) is presented in this paper. WBAN has been experimentally constructed in order to illustrate and capture on-body topology disconnections. The discontinuity of the topology outcomes of the presence of ultra-short transmission range radio links, unexpected Radio Frequency (RF) attenuation, and the mobility of the human posture. Energy harvesting model for ultra-short transmission range on-body sensor is proposed. Then, these sensors are used for demonstrating delay techniques for evaluating on-body single-copy Delay Tolerant Network (DTN) packet routing protocols. In this paper, source-to-destination packet routing delay for different protocols like, opportunistic, random-based, utility-based and other protocols that capture multi-scale neighborhoods in human postural mobility has been constructed and evaluated. Then, performance results of the proposed protocols are evaluated experimentally and compared with the results obtained via the model that is developed. Through multi-scale modeling of the on-body spatio temporal neighborhood of the link disconnection patterns, it is shown that the proposed protocols can provide enhanced routing performance compared with a number of existing opportunistic, utility and random based DTN packet routing protocols.

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Improving Vehicular Delay-Tolerant Network Performance with Relay Nodes

Cited by 35 publications

References 18 publications

From Delay-Tolerant Networks to Vehicular Delay-Tolerant Networks

From Delay-Tolerant Networks to Vehicular Delay-Tolerant Networks

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

Delay Tolerant Routing Protocol Modeling for Low Power Wearable Wireless Sensor Networks

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