A Comprehensive Review on the Vehicular Ad-hoc Networks

Bhatia, Tarandeep Kaur; Ramachandran, Ramkumar Ketti; Doss, Robin; Pan, Lei

doi:10.1109/icrito48877.2020.9197778

Cited by 10 publications

(9 citation statements)

References 23 publications

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“…Thus, they can become particularly valuable for national authorities safety and security organizations in case of a blackout, e. g. after a natural catastrophe [1]. Besides, vehicular and flying MANETs (VANETs [2], FANETs [3]) gain a rising popularity nowadays. In ad-hoc networks often messages originated from one node have to be distributed in the entire network for network control and maintenance [4].…”

Section: Multistage Distributed Cooperative Communication In Mobile A...mentioning

confidence: 99%

SDR-based Demonstration System and Applicability of SNR Aggregation for Multistage Distributed Cooperative Communication in MANETs

Yüksel,

Rolny,

Kuhn

et al. 2023

2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring)

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Multistage or hierarchical distributed cooperative communication on the physical layer is a promising approach to overcome the scalability limitation of Mobile Ad-hoc Networks (MANETs). Standalone nodes that could successfully decode messages join transmission and support each other. They become a virtual transmit cluster and send simultaneously.While information theoretic research has demonstrated that an approximately linear scaling behaviour can be achieved, imperfections and constraints of practical systems have not been taken into account. Within this paper, we present a scalable and modular low-cost demonstration system based on software-defined radios (SDRs) to study distributed cooperative communication in practical MANETs. Furthermore, we apply SNR aggregation in combination with distributed cooperative transmission. To this end, we show a practical implementation approach and investigate the performance by measurements and simulations. Our results clearly highlight the advantages of combining distributed cooperative communication and SNR aggregation, e. g. to overcome larger distances in a distributed long haul multiple-input single-output (MISO) scenario or to enable a more efficient broadcast.

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Section: Multistage Distributed Cooperative Communication In Mobile A...mentioning

confidence: 99%

SDR-based Demonstration System and Applicability of SNR Aggregation for Multistage Distributed Cooperative Communication in MANETs

Yüksel,

Rolny,

Kuhn

et al. 2023

2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring)

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“…Since each node is equipped with an own oscillator, in principal each will induce a different carrier frequency offset (CFO), while node mobility is a further source for CFO due to the Doppler shift. The latter is specifically an issue for the increasingly popular Vehicular or Flying Ad-Hoc Networks (VANETs [3], FANETs [4]). Multi-carrier modulation schemes, like Orthogonal Frequency 1.…”

Section: Criticality Of Carrier Frequency Offsetmentioning

confidence: 99%

Multi-Carrier (OFDM) Cooperative Transmission in MANETs with Multiple Carrier Frequency Offsets

Yuksel

Rolny²,

Kuhn

et al. 2022

2022 18th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)

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Cooperative transmission, realized by aggregating several nodes to a virtual multiple input system, is an auspicious approach to establish a more robust and effective communication in MANETs. In such a setup, impairments, i. e. multiple timing and carrier frequency offsets (TO, CFO) will occur. While multi-carrier schemes, e. g. Orthogonal Frequency Division Multiplexing (OFDM), are well-known to mitigate the impact of multipath propagation and TO, multiple CFO causes inter-carrier-interference (ICI) which typically degrades the performance significantly. Within this paper, we propose an effective code and equalizer structure that allows to overcome this limitation. It mitigates the impact of multiple CFO that can be significantly larger than the subcarrier spacing with a reasonable computational effort. For that, we utilize inherent code properties of Linear-Scalable Dispersion Codes (LSDCs) and propose a communication system composed of an equalizer structure in combination with LSDCs that enables multi-carrier distributed cooperative transmission for practical MANETs with high node mobility. We demonstrate the benefits of cooperative transmission in comparison to classical non-cooperative multihop or concurrent transmission by outage simulations, which clearly indicate that our proposal can be of crucial importance for the overall MANET scalability. Lastly, we compare our OFDM system with a recently proposed time-domain equalization singlecarrier system and point out use cases, where the OFDM system can be more advantageous.

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“…However, current VANET networks architecture may face several issues caused by rapid growth of the vehicular users and high data rate demands for wide range of applications and services. At high mobility scenario and overcrowded roads, this architecture is unable to satisfy the latency requirements of future ITS [4], [5]. The development of 5G mobile technologies may offer new opportunities to design a flexible VANET architecture with low latency and higher bandwidth demands.…”

Section: Introductionmentioning

confidence: 99%

Flexible handover solution for vehicular ad-hoc networks based on software defined networking and fog computing

Murtadha

Mushgil

2023

IJECE

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<p>Vehicular ad-hoc networks (VANET) suffer from dynamic network environment and topological instability that caused by high mobility feature and varying vehicles density. Emerging 5G mobile technologies offer new opportunities to design improved VANET architecture for future intelligent transportation system. However, current software defined networking (SDN) based handover schemes face poor handover performance in VANET environment with notable issues in connection establishment and ongoing communication sessions. These poor connectivity and inflexibility challenges appear at high vehicles speed and high data rate services. Therefore, this paper proposes a flexible handover solution for VANET networks by integrating SDN and fog computing (FC) technologies. The SDN provides global knowledge, programmability and intelligence functions for simplified and efficient network operation and management. FC, on the other hand, alleviates the core network pressure by providing real time computation and transmission functionalities at edge network to maintain the demands of delay sensitive applications. The proposed solution overcomes frequent handover challenges and reduces the processing overhead at core network. Moreover, the simulation evaluation shows significant handover performance improvement of the proposed solution compared to current SDN based schemes, especially in terms of handover latency and packet loss ratio under various simulation environments.</p>

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A Comprehensive Review on the Vehicular Ad-hoc Networks

Cited by 10 publications

References 23 publications

SDR-based Demonstration System and Applicability of SNR Aggregation for Multistage Distributed Cooperative Communication in MANETs

SDR-based Demonstration System and Applicability of SNR Aggregation for Multistage Distributed Cooperative Communication in MANETs

Multi-Carrier (OFDM) Cooperative Transmission in MANETs with Multiple Carrier Frequency Offsets

Flexible handover solution for vehicular ad-hoc networks based on software defined networking and fog computing

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