Cooperative vehicular communications at intersections over Nakagami-m fading channels

Belmekki, Baha Eddine Youcef; Hamza, Abdelkrim; Escrig, Benoît

doi:10.1016/j.vehcom.2019.100165

Cited by 18 publications

(6 citation statements)

References 24 publications

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“…Every vehicle has a communication coverage of 100 m and uses the 802.11p (WAVE) [ 49 ] protocol as the MAC protocol with a header size of 70 bytes. For the propagation delay and the propagation loss models [ 50 ], our simulations use the Constant Speed Propagation Delay Model [ 51 , 52 ] and the Nakagami Propagation Loss Model [ 53 , 54 ], respectively. We set the size of the requested content from 150 to 400 (MB).…”

Section: Performance Evaluationmentioning

confidence: 99%

Adaptive Content Precaching Scheme Based on the Predictive Speed of Vehicles in Content-Centric Vehicular Networks

Nam

Choi

Shin

et al. 2021

Sensors

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Content-Centric Vehicular Networks (CCVNs) are considered as an attractive technology to efficiently distribute and share contents among vehicles in vehicular environments. Due to the large size of contents such as multimedia data, it might be difficult for a vehicle to download the whole of a content within the coverage of its current RoadSide Unit (RSU). To address this issue, many studies exploit mobility-based content precaching in the next RSU on the trajectory of the vehicle. To calculate the amount of the content precaching, they use a constant speed such as the current speed of the vehicle requesting the content or the average speed of vehicles in the next RSU. However, since they do not appropriately reflect the practical speed of the vehicle in the next RSU, they could incorrectly calculate the amount of the content precaching. Therefore, we propose an adaptive content precaching scheme (ACPS) that correctly estimates the predictive speed of a requester vehicle to reflect its practical speed and calculates the amount of the content precaching using its predictive speed. ACPS adjusts the predictive speed to the average speed starting from the current speed with the optimized adaptive value. To compensate for a subtle error between the predictive and the practical speeds, ACPS appropriately adds a guardband area to the precaching amount. Simulation results verify that ACPS achieves better performance than previous schemes with the current or the average speeds in terms of the content download delay and the backhaul traffic overhead.

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Section: Performance Evaluationmentioning

confidence: 99%

Adaptive Content Precaching Scheme Based on the Predictive Speed of Vehicles in Content-Centric Vehicular Networks

Nam

Choi

Shin

et al. 2021

Sensors

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“…Hence, providing the areas with seamless and high data rate internet connection to assist the existing communication infrastructures in the area. Also, NTFPs have a better line-of-sight clearance to assist not only Ground-based vehicular communications [9], but also aerial vehicular communications [10]. • Temporary Coverage: After a disaster, NTFPs are the perfect solution to bring the coverage after the communications infrastructures are destroyed.…”

Section: ) Surveillancementioning

confidence: 99%

On the Usage of Networked Tethered Flying Platforms for Massive Events -- Case Study: Hajj Pilgrimage

Belmekki¹,

Alouini²

2021

Preprint

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The Hajj is a religious Muslim pilgrimage undertaken annually by 2-3 million people in Makkah. Consequently, several problems arise due to the sheer number of pilgrims, and therefore negatively impact their stay and the conduct of the rituals. During the Hajj, several problems occur related to mobility, security, and connectivity. The current solutions used to deal with these problems have limitations and they usually require a lot of resources with suboptimal results. In this paper, we proposed an aerial-based solution that rely on Networked Tethered Flying Platforms (NTFPs). NTFPs are flying vehicles such as drones, Helikites, and blimps, that are tethered to the ground via a cable that supplies them with constant data and power. NTFPs can fly at high altitude with a great backhaul capacity and large coverage. We show in this paper how NTFPbased solution solve mobility, security, and connectivity problems during the Hajj and the main advantages and benefits as well as the cost-efficiency of such solution. For the sake of completeness, we also present other similar case studies in which NTFPs can be used.

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“…The eVTOLs fly at an altitude of 300 m and are distributed according to a two-dimensional (2D) binomial point process with intensity λ eV = 10 eVTOLs; the UAVs fly at 100 m and are distributed according to a 2D homogeneous Poisson point process (HPPP) with intensity λ U AV = 5 × 10 −5 UAV/m 2 , pedestrians and ground vehicles are distributed according to a one-dimensional (1D) HPPP with intensity λ p = 1 × 10 −3 pedestrian/m 2 [25]. The NTFP is a tethered blimp flying at an altitude of 500 m, and the cellular tower mast is 50 m high.…”

Section: Simulationmentioning

confidence: 99%

Technological Trends and Key Communication Enablers for eVTOLs

Zaid¹,

Belmekki²,

Alouini³

2021

Preprint

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The world is looking for a new exciting form of transportation that will cut our travel times considerably. In 2021, the time has come for flying cars to become the new transportation system of this century. Electric vertical take-off and landing (eVTOL) vehicles, which are a type of flying cars, are predicted to be used for passenger and package transportation in dense cities. In order to fly safely and reliably, wireless communications for eVTOLs must be developed with stringent eVTOL communication requirements. Indeed, their communication needs to be ultra-reliable, secure with ultra-high data rate and low latency to fulfill various tasks such as autonomous driving, sharing a massive amount of data in a short amount of time, and high-level communication security. In this paper, we propose major key communication enablers for eVTOLs ranging from the architecture, air-interface, networking, frequencies, security, and computing. To show the relevance and the impact of one of the key enablers, we carried out comparative simulations to show the superiority compared to the current technology. We compared the usage of an air-based communication infrastructure with a tower mast in a realistic scenario involving eVTOLs, delivery drones, pedestrians, and vehicles.

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Cooperative vehicular communications at intersections over Nakagami-m fading channels

Cited by 18 publications

References 24 publications

Adaptive Content Precaching Scheme Based on the Predictive Speed of Vehicles in Content-Centric Vehicular Networks

Adaptive Content Precaching Scheme Based on the Predictive Speed of Vehicles in Content-Centric Vehicular Networks

On the Usage of Networked Tethered Flying Platforms for Massive Events -- Case Study: Hajj Pilgrimage

Technological Trends and Key Communication Enablers for eVTOLs

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