A Qos-based dynamic slot assignment algorithm with adaptive frame

Zhang, Zian; Zhang, Xiaoning

doi:10.1109/chinacom.2013.6694581

Cited by 3 publications

References 7 publications

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Hybrid adaptive MAC scheme for the broadcast of vehicular safety beacons

Benaidja

2022

Int J Communication

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Vehicular safety applications are based on broadcasting periodic safety beacons on the IEE802.11p control channel. The CSMA MAC scheme adopted in the IEE802.11p cannot ensure the strict timeline and the high reliability when broadcasting these real time and critical messages since it does not consider the high mobility of vehicles, the limited network resources, and the variant traffic densities. Therefore, the design of an effective MAC scheme that takes in consideration these parameters represents a challenging task. Furthermore, the fixed beaconing rate results an overload on the commination channel and collisions especially in dense situations that delay beacons broadcast. In this paper, we propose a novel hybrid MAC scheme for fast and reliable broadcast of safety beacons. At first, it relies on a time slot reuse policy that considers the mobility features of vehicles while reducing transmission collisions. In addition, it adapts mathematically the beaconing rate to the traffic density based on vehicular velocity at the aim of optimizing the performance of the wireless channel. Simulation results show that our proposal outperforms significantly the IEEE802.11p CSMA MAC scheme and upgrades the performance of vehicular networks in broadcasting periodic safety beacons.

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Hybrid adaptive MAC scheme for the broadcast of vehicular safety beacons

Benaidja

2022

Int J Communication

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Time division multiple access scheduling strategies for emerging vehicular ad hoc network medium access control protocols: a survey

et al. 2019

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Vehicular Ad hoc Network (VANET) is an emerging and promising technology, which allows vehicles to communicate and share resources. These resources use applications that have to meet high reliability and delay constraints. However, to implement these applications, VANET relies on medium access control (MAC) protocol. Many approaches have been proposed in literature using Time Division Multiple Access (TDMA) scheme to enhance the efficiency of MAC protocol. Nevertheless, this technique is faced with some challenges including access and merging collisions due to inefficient time slot allocation strategy and hidden terminal problem. In this paper, we relatively examined the most prominent TDMA MAC protocols proposed in the literature from the year 2010 to 2017. We classify them based on scheduling strategy and the technique they adopt. We also comparatively analysed them based on different parameters and performance metrics used.Finally, some open issues are presented for future deployment.

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