Synthesizing Existing CSMA and TDMA Based MAC Protocols for VANETs

Huang, Jiawei; Li, Qi; Zhong, Shaohua; Liu, Lianhai; Zhong, Ping; Wang, Jianxin; Ye, Jin

doi:10.3390/s17020338

Cited by 24 publications

(10 citation statements)

References 17 publications

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“…These types of protocols control channel access through adjustment of channel access parameters, e.g. contention window size [55]. In priority-based approaches, different priorities are assigned to messages based on their type [56].…”

Section: Congestion Control Strategies For Vanetsmentioning

confidence: 99%

Congestion Avoidance in Vehicular Networks: A Contemporary Survey

et al. 2019

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Congestion in vehicular ad hoc networks affects the performance of delay-sensitive applications when exchanging emergency or general information sharing messages. In particular, during emergencies on roads like road accidents and security warnings demand high reliability and low latency. However, in traditional solutions, such messages use the same control channel for transmission leading up to a saturated or congested channel. Furthermore, the highly dynamic nature of vehicular networks leading up to unpredictable routing patterns, subsequently degrading the network performance. An uneven deliverance of these critical messages can be catastrophic for the delay-sensitive applications. Thus, congestion control remains one of the most challenging problems within the domain of vehicular networks. This paper provides a comprehensive overview of the working of vehicular networks, the recent research advances to cater for congestion in such networks, and open problems and challenges relevant to congestion avoidance. INDEX TERMS Ad hoc vehicular network, congestion avoidance, power-based, rate-based, priority-based, clustering-based, CSMA/CA-based, hybrid, vehicular simulation. NOMENCLATURE ACRONYMS

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Section: Congestion Control Strategies For Vanetsmentioning

confidence: 99%

Congestion Avoidance in Vehicular Networks: A Contemporary Survey

et al. 2019

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“…The first is the hidden/exposed terminal problems that must be solved in VANETs. Meanwhile, the high-speed moving characteristics of vehicles causes not only drastic topology changes, but also the interruptions of communication links [ 14 , 15 ]. It also faces the problems of insufficient use of a single channel and inefficient load balancing on multiple channels.…”

Section: Introductionmentioning

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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“…Because vehicles are mobile, the topology of the network changes rapidly. For a given node, because the other vehicles move in and out of its transmission range at high speed, the traffic density around the node varies quickly with time, which has a great impact on the performance of medium access control (MAC) protocols . Because one of the most crucial objectives of VANETs is to support safety applications, which operate based on basic safety messages broadcasted by vehicles, flexible, efficient, and robust protocols should be designed for VANETs to support reliable safety‐related application services.…”

Section: Introductionmentioning

confidence: 99%

TCGMAC: A TDMA‐based MAC protocol with collision alleviation based on slot declaration and game theory in VANETS

Liu

Wang

et al. 2019

Trans Emerging Tel Tech

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Recently, there has been increasing interest in intelligent transport systems and intelligent connected vehicles. Vehicular ad hoc networks play an important role in these areas. Many time-division multiple access (TDMA)-based protocols have been proposed to obtain lower transmission delay and packet loss rate.However, transmission collisions occur when nodes that belong to the same two-hop set use the same time slot in TDMA-based protocols. Meanwhile, nodes reacquire slots because of the packet loss caused by poor channel conditions, which further lowers the protocol's performance. In this paper, we study TCG-MAC, a combined TDMA and carrier-sense multiple access (CSMA) medium access control (MAC)-layer protocol. Each time frame is divided into two parts: the TDMA period (TP) and the CSMA period (CP). TP is used for application data transmission, and CP is used for the slot requirement. If two or more nodes acquire the same time slot in the CP, game theory is used to improve the slot allocation efficiency. The simulation results demonstrate that TCGMAC performs well in different traffic densities and channel conditions. Trans Emerging Tel Tech. 2019;30:e3730.wileyonlinelibrary.com/journal/ett

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Synthesizing Existing CSMA and TDMA Based MAC Protocols for VANETs

Cited by 24 publications

References 17 publications

Congestion Avoidance in Vehicular Networks: A Contemporary Survey

Congestion Avoidance in Vehicular Networks: A Contemporary Survey

Review of MAC Protocols for Vehicular Ad Hoc Networks

TCGMAC: A TDMA‐based MAC protocol with collision alleviation based on slot declaration and game theory in VANETS

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