Lifetime determination for delay tolerant communications in sparse vehicular networks

Sevimli, Kadri Kaan; Soytürk, Müjdat

doi:10.1109/iswpc.2010.5483726

Cited by 7 publications

(5 citation statements)

References 11 publications

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“…This avoids having older data that is occupying resources for too long from preventing the delivery of newer data. In [176], the impact of packet lifetime is studied in vehicular DTNs, where it can be adapted to enhance performance based on vehicle speed, vehicle density, and quality of service requirements. DTNs can be extended to a scenario with device-to-device (D2D) communications,…”

Section: E Delay Tolerant Network (Dtns)mentioning

confidence: 99%

A Key 6G Challenge and Opportunity—Connecting the Base of the Pyramid: A Survey on Rural Connectivity

2020

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Providing connectivity to around half of the world population living in rural or underprivileged areas is a tremendous challenge, but also a unique opportunity. Access to the internet would provide the population living in these areas a possibility to progress on the educational, health, environment, and business levels. In this paper, a survey of technologies for providing connectivity to rural areas, and that can help address this challenge, is provided. Although access/fronthaul and backhaul techniques are discussed in the paper, it is noted that the major limitation for providing connectivity to rural and underprivileged areas is the cost of backhaul deployment. In addition, energy requirements and cost efficiency of the studied technologies are analyzed. In fact, the challenges faced for deploying an electricity network, as a prerequisite for deploying communication networks, are huge in these areas and they are granted an important share of the discussions in this paper. Furthermore, typical application scenarios in rural areas are discussed, and several country-specific use cases are surveyed. The main

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Section: E Delay Tolerant Network (Dtns)mentioning

confidence: 99%

A Key 6G Challenge and Opportunity—Connecting the Base of the Pyramid: A Survey on Rural Connectivity

2020

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“…This avoids having older data that is occupying resources for too long from preventing the delivery of newer data. In [156], the impact of packet lifetime is studied in vehicular DTNs, where it can be adapted to enhance performance based on vehicle speed, vehicle density, and quality of service requirements. DTNs can be extended to a scenario with D2D communications, where the user devices relay the traffic in a multihop fashion.…”

Section: G Delay Tolerant Network (Dtns)mentioning

confidence: 99%

“…This avoids having older data that is occupying resources for too long from preventing the delivery of newer data. In [156],…”

Section: G Delay Tolerant Network (Dtns)mentioning

confidence: 99%

A Key 6G Challenge and Opportunity - Connecting the Remaining 4 Billions: A Survey on Rural Connectivity

Yaacoub¹,

Alouini²

2019

Preprint

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DRAFT 4) Hyper Connected: This scenario corresponds to people enjoying state-of-the-art connectivity, e.g., at least 4G and possibly 5G cellular connectivity, and/or with high speed fixed DSL or FTTH or FTTN connectivity. These subscribers typically live in urban areas, and it is extremely difficult to find them in rural areas, due to the numerous barriers discussed previously. This paper surveys the literature aiming to provide basic connectivity to the unconnected population, or aiming to increase the connectivity level of those with basic connectivity ("Under Hence, the challenges for FSO in space are less critical, and indeed significantly better performance can be achieved, especially due to the fact that the optical signal is not traversing the atmosphere. In 2008, an optical inter-satellite link achieved a data rate transmission of 5.6 Gbps for distances up to 5, 000 km in the European Data Relay satellite System (EDRS). Newer terminals can transmit at a data rate of 1.8 Gbps for distances up to 45, 000 km. The intersatellite Ka band link achieved 300 Mbps [44]. In EDRS, LEO satellites relay the data from ground stations to GEO satellites using FSO for the GEO-LEO satellite communication, and RF bands for communication with the ground stations (similarly to the satellite-satellite Ka link, the satellite-ground Ka link achieved 300 Mbps) [44]. Some of the recent satellite constellations discussed in Section II-E, e.g., Starlink, are also expected to use FSO for its inter-satellite communication [45,46,47]. D. HAPs/Drones/UAVs/BalloonsTo solve the coverage problem in large rural areas without relying on the deployment of costly wired infrastructure for backhaul, HAPs and UAVs are generally recommended [48].UAVs are proposed in [49] to provide backhaul connectivity for ground 5G base stations. A steering algorithm to allow the antennas of the UAV and the ground BS to be dynamically steered towards each other is proposed in [49], and tested via an experimental setup. In[50], a multihop network of HAPs is proposed for providing backhaul connectivity to TVWS deployments in rural areas. The HAPs communicate with each other using mmWave frequencies, and with the ground stations using FSO.An interference alignment scheme to maximize the sum-rate capacity of HAPs communicating with GSs is proposed in [51]. The scheme assumes M HAP drones and N GSs, with no CSI at the HAPs. A tethered balloon with (M − 1) × (N − 1) antennas is used as a decode and forward (DF) relay with half-duplex operation: The HAPs transmit their data to the GSs first, then the tethered balloon relays the data after performing pre-coding [51].Aerostats filled with lighter than air gas are tethered to the ground and used to provide connectivity to rural areas in [52]. Although these tethered aerostats can be used to provide backhaul connectivity by communicating with each other using directive antennas, they were also used in [52] to provide fronthaul WiFi access by using high gain omnidirectional antennas.

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“…As ships can be very dense in certain busy locations across main shipping channels and very sparse in others such as deep ocean and shallows, a new secure hybrid routing protocol is proposed that switches automatically between Ad-hoc On-Demand Distance Vector (AOMDV) routing protocol (the best performing routing protocol in dense locations as found in [19] [20]) and Binary Spray and Wait (SW) DTN (the best performing routing protocol in sparse situations [21] [22]). The routing process at each ship always starts with AOMDV route discovery, where a Route Request message (RREQ) is propagated towards the destination.…”

Section: S-madnet Routing Protocolmentioning

confidence: 99%

Securing Marine Data Networks in an IoT Environment

Al-Khalidi

Al-Zaidi

Woods

et al. 2019

2019 7th International Conference on Future Internet of Things and Cloud (FiCloud)

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With the huge proliferation of sensory applications, the Internet of Things (IoT) is promising connectivity capacity far beyond the conventional computing platforms, with an ultimate goal of connecting all everyday objects. Sensory applications in the marine environment are foreseen to be an integral part of this connected world, forming the Internet of Marine Things (IoMaT). While some efforts that aim to establish network connectivity in such a sparse environment exist, securing these networks is still an unreached goal. This paper introduces a secure Mobile Ad-hoc/Delay Tolerant routing protocol (S-MADNET) for the marine environment over VHF equipment available on the majority of ships. The proposed secure network is designed to use the existing Automatic Identification System (AIS) that ships use for positioning and navigation aid. An IoMaT routing module that forwards marine sensory data using the proposed secure protocol is also presented, taking the AIS system level considerations into account. Furthermore, a new AIS message format with IoMaT support is proposed that accommodates the requirements of the secure routing protocol. Evaluation results show that the proposed S-MADNET routing protocol outperforms its counterparts in terms of packet delivery rates and packet duplication rates, while maintaining data security.

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Lifetime determination for delay tolerant communications in sparse vehicular networks

Cited by 7 publications

References 11 publications

A Key 6G Challenge and Opportunity—Connecting the Base of the Pyramid: A Survey on Rural Connectivity

A Key 6G Challenge and Opportunity—Connecting the Base of the Pyramid: A Survey on Rural Connectivity

A Key 6G Challenge and Opportunity - Connecting the Remaining 4 Billions: A Survey on Rural Connectivity

Securing Marine Data Networks in an IoT Environment

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