Space-Orthogonal Frequency-Time medium access control (SOFT MAC) for VANET

Abdalla, Ghassan M. T.; Abu-Rgheff, Mosa Ali; Senouci, Sidi‐Mohammed

doi:10.1109/giis.2009.5307071

Cited by 30 publications

(18 citation statements)

References 13 publications

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“…It is a combination of CSMA, SDMA, OFDMA and TDMA techniques [8]. OFDMA and SDMA are required to perform simultaneous transmissions while the contention-free channel access is ensured by TDMA scheme.…”

Section: Soft-macmentioning

confidence: 99%

A survey on hybrid MAC protocols for vehicular ad-hoc networks

Jayaraj

Hemanth

Sangeetha

2016

Vehicular Communications

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Section: Soft-macmentioning

confidence: 99%

A survey on hybrid MAC protocols for vehicular ad-hoc networks

Jayaraj

Hemanth

Sangeetha

2016

Vehicular Communications

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“…To address this problem, time division multiple access (TDMA) and space division multiple access (SDMA) based techniques [7], [8], [9], [10], [6] have recently received much attention in the VANET literature because they are able to provide guaranteed delay. TDMAbased schemes rely on assigning different time slots to the vehicles that are closer to each other in order to minimize the contention chances among vehicles, reusing the same slot times for farthest vehicles.…”

Section: Related Workmentioning

confidence: 99%

“…In SDMA-based techniques [9], [10], the road is divided into subsets which are called cells. A particular set of time slots are assigned to each cell, so that each vehicle chooses its time slot based on its location on the road.…”

Section: Related Workmentioning

confidence: 99%

DTB-MAC: Dynamic Token-Based MAC Protocol for reliable and efficient beacon broadcasting in VANETs

Balador

Calafate

Cano

et al. 2015

2015 12th Annual IEEE Consumer Communications and Networking Conference (CCNC)

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Abstract-Most applications developed for vehicular environments rely on broadcasting as the main mechanism to disseminate their messages. However, in IEEE 802.11p, which is the most widely accepted MAC protocol for vehicular communications, all transmissions remain unacknowledged if broadcasting is used. Furthermore, safety message transmission requires a strict delay limit and a high reliability, which is an issue for random access MAC protocols like IEEE 802.11p. Therefore, transmission reliability becomes the most important issue for broadcast-based services in vehicular environments. In this paper, we propose a hybrid MAC protocol, referred as Dynamic Token-Based MAC Protocol (DTB-MAC). DTB-MAC uses both a token passing mechanism and a random access MAC protocol to prevent channel contention as much as possible, and to improve the reliability of safety message transmissions. Our proposed protocol tries to select the best neighbouring node as the next transmitter, and when it is not possible, or when it causes a high overhead, the random access MAC protocol is used instead. Based on simulation experiments, we show that the DTB-MAC protocol can achieve better performance compared with IEEE802.11p in terms of channel utilization and beacon delivery ratio.

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“…The centralised controller dynamically makes decisions to segment the large-scale network into multiple serving areas, and efficiently allocates control and service channels across the entire network. The concept of network segmentation has been previously employed in [14], [15], [16]. It is worth noting that different from existing work, this proposed segmentation approach adapts to the network status (e.g., node density) and integrates with the asynchronous multi-channel extensions of the IEEE 802.11p MAC sub-layer.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Network Segmentation and Channel Allocation in Large-Scale V2X Communication Networks

Han

Dianati

Cao

et al. 2019

IEEE Trans. Commun.

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Mobility, node density and the demand for large volumes of data exchange have aggravated competition for limited resources in the wireless communications environment. This paper proposes a novel MAC scheme called Segmentation MAC (SMAC) which can be used in large-scale Vehicleto-Everything (V2X) communication networks. SMAC functions to support the dynamical allocation of radio channels. It is compatible with the asynchronous multi-channel MAC sub-layer extension of the IEEE 802.11p standard. A key innovate feature of SMAC is that the segmentation of the network and channel allocations are dynamically adjusted according to the density of vehicles. We also propose a novel efficient forwarding mechanism to ensure inter-segment connectivity. To evaluate the

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Space-Orthogonal Frequency-Time medium access control (SOFT MAC) for VANET

Cited by 30 publications

References 13 publications

A survey on hybrid MAC protocols for vehicular ad-hoc networks

A survey on hybrid MAC protocols for vehicular ad-hoc networks

DTB-MAC: Dynamic Token-Based MAC Protocol for reliable and efficient beacon broadcasting in VANETs

Adaptive Network Segmentation and Channel Allocation in Large-Scale V2X Communication Networks

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