PDMAC: A Priority-Based Enhanced TDMA Protocol for Warning Message Dissemination in VANETs

Abbas, Ghulam; Abbas, Ziaul Haq; Haider, Shahab; Baker, Thar; Boudjit, Saâdi; Muhammad, Fazal

doi:10.3390/s20010045

Cited by 34 publications

(17 citation statements)

References 47 publications

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“…The idea behind tackling communication congestion and the broadcast storm problem is to reduce redundant transmissions [ 20 ]. The existing approaches either permit only a limited number of nodes to retransmit EMs or restrict redundant EM transmissions.…”

Section: Related Workmentioning

confidence: 99%

EEMDS: An Effective Emergency Message Dissemination Scheme for Urban VANETs

Ullah

Abbas

Waqas

et al. 2021

Sensors

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In Vehicular Adhoc Networks (VANETs), disseminating Emergency Messages (EMs) to a maximum number of vehicles with low latency and low packet loss is critical for road safety. However, avoiding the broadcast storm and dealing with large-scale dissemination of EMs in urban VANETs, particularly at intersections, are the challenging tasks. The problems become even more challenging in a dense network. We propose an Effective Emergency Message Dissemination Scheme (EEMDS) for urban VANETs. The scheme is based on our mobility metrics to avoid communication overhead and to maintain a stable cluster structure. Every vehicle takes into account its direction angle and path loss factor for selecting a suitable cluster head. Moreover, we introduce estimated link stability to choose a suitable relay vehicle that reduces the number of rebroadcasts and communication congestion in the network. Simulation results show that EEMDS provides an acceptable end-to-end delay, information coverage, and packet delivery ratio compared to the eminent EM dissemination schemes.

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Section: Related Workmentioning

confidence: 99%

EEMDS: An Effective Emergency Message Dissemination Scheme for Urban VANETs

Ullah

Abbas

Waqas

et al. 2021

Sensors

Self Cite

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“…The protocol is also adaptive to frequent topological changes. Keeping the direction in mind, a medium access control protocol named priority-based direction-aware media access control (PDMAC) was introduced for VANETs [35]. Besides the direction component, PDMAC also consid- ers the type and priority of messages as design parameters.…”

Section: A Routing Protocols For Vanetsmentioning

confidence: 99%

Routing Protocols for Unmanned Aerial Vehicle-Aided Vehicular Ad Hoc Networks: A Survey

2020

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In intelligent transportation systems, a vehicular ad hoc network (VANET) has a significant impact in enhancing road safety, traffic management efficiency, and in-vehicle infotainment features. Routing in a VANET is hampered by frequent link disconnection for non-line-of-sight communication due to roadside obstacles, high mobility, and frequent topological changes. With the help of three-dimensional movement capability, an unmanned aerial vehicle (UAV) can drastically improve the routing experience of a VANET, by increasing the line-of-sight probability, better connectivity, and efficient store-carry-forward mechanism. As a result, various routing protocols with different objectives have been reported for UAVaided VANETs. Several surveys have been conducted based on different routing protocols for VANETs so far. However, to the best of the authors' knowledge, no survey exists till now that dedicatedly covers routing protocols for UAV-aided VANETs. This survey paper presents a comprehensive review on state-of-the-art routing protocols for UAV-aided VANETs. The protocols are categorized into seven groups in terms of their working mechanism and design principles. The shortcomings of the protocols are identified individually by critically analyzing them with regard to their advantages, disadvantages, application areas, and future improvements. The routing protocols are qualitatively compared with each other in tabular format as well on the basis of various design aspects and system parameters. In particular, not only performance and special features but also optimization criteria and techniques are extensively discussed in addition to the tabular comparison. Furthermore, open research issues and challenges are summarized and discussed. INDEX TERMS Unmanned aerial vehicle, vehicular ad hoc network, mobile ad hoc network, routing protocol, drone, roadside unit, multihop routing.

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“…Priority-based direction-aware MAC (PDMAC), a cluster-based MAC protocol, emphasizes the low clock synchronization efficiency of the traditional TDMA-based protocol [ 60 ]. Figure 7 shows the overview of the PDMAC protocol.…”

Section: Single-channel Mac Protocolsmentioning

confidence: 99%

Review of MAC Protocols for Vehicular Ad Hoc Networks

Liu

Luo

et al. 2020

Sensors

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Vehicular ad hoc networks (VANETs) need to support the timely end-to-end transmissions of safety and non-safety messages. Medium access control (MAC) protocols can ensure fair and efficient sharing of channel resources among multiple vehicles for VANETs, which can provide timely packet transmissions and significantly improve road safety. In this paper, we review the standards of some countries for VANETs. Then, we divide the MAC protocols proposed for VANETs into single-channel MAC protocols and multi-channel MAC protocols according to the number of physical occupied spectrum resources. Both are further discussed based on their hierarchical structures, i.e., distributed and centralized structures. General design and optimization mechanisms of these commonly used MAC protocols for VANETs are reviewed. From the viewpoint of 7 aspects, we compare the advantages and disadvantages of these typical MAC protocols. Finally, we discuss the open issues to improve the MAC performance and future work on MAC design for VANETs.

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PDMAC: A Priority-Based Enhanced TDMA Protocol for Warning Message Dissemination in VANETs

Cited by 34 publications

References 47 publications

EEMDS: An Effective Emergency Message Dissemination Scheme for Urban VANETs

EEMDS: An Effective Emergency Message Dissemination Scheme for Urban VANETs

Routing Protocols for Unmanned Aerial Vehicle-Aided Vehicular Ad Hoc Networks: A Survey

Review of MAC Protocols for Vehicular Ad Hoc Networks

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