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Article

A TDMA-Based MAC Protocol for Mitigating Mobility-Caused Packet Collisions in Vehicular Ad Hoc Networks

by 1,2, 1,2 and 1,2,*
1
School of Electronics and Information Engineering, Beihang University, Beijing 100191, China
2
Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, China
*
Author to whom correspondence should be addressed.
Academic Editors: César Briso-Rodríguez, Ke Guan, Andrej Hrovat and Youyun Xu
Sensors 2022, 22(2), 643; https://doi.org/10.3390/s22020643
Received: 15 December 2021 / Revised: 10 January 2022 / Accepted: 11 January 2022 / Published: 14 January 2022
(This article belongs to the Special Issue Wireless Communications in Intelligent Transportation Systems)
An autonomous driving environment poses a very stringent requirement for the timely delivery of safety messages in vehicular ad hoc networks (VANETs). Time division multiple access (TDMA)-based medium access control (MAC) protocols are considered a promising solution because of their time-bound message delivery. However, in the event of mobility-caused packet collisions, they may experience an unpredicted and extended delay in delivering messages, which can cause catastrophic accidents. To solve this problem, a distributed TDMA-based MAC protocol with mobility-caused collision mitigation (MCCM-MAC) is presented in this paper. The protocol uses a novel mechanism to detect merging collisions and mitigates them by avoiding subsequent access collisions. One vehicle in the merging collisions retains the time slot, and the others release the slot. The common neighboring vehicles can timely suggest a suitable new time slot for the vacating vehicles, which can avoid access collisions between their packet transmissions. A tie-breakup mechanism is employed to avoid further access collisions. Simulation results show that the proposed protocol reduces packet loss more than the existing methods. Consequently, the average delay between the successfully delivered periodic messages is also reduced. View Full-Text
Keywords: vehicular ad hoc networks; medium access control; time division multiple access; merging collision mitigation; time-bounded message delivery vehicular ad hoc networks; medium access control; time division multiple access; merging collision mitigation; time-bounded message delivery
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MDPI and ACS Style

Latif, M.B.; Liu, F.; Liu, K. A TDMA-Based MAC Protocol for Mitigating Mobility-Caused Packet Collisions in Vehicular Ad Hoc Networks. Sensors 2022, 22, 643. https://doi.org/10.3390/s22020643

AMA Style

Latif MB, Liu F, Liu K. A TDMA-Based MAC Protocol for Mitigating Mobility-Caused Packet Collisions in Vehicular Ad Hoc Networks. Sensors. 2022; 22(2):643. https://doi.org/10.3390/s22020643

Chicago/Turabian Style

Latif, Muhammad B., Feng Liu, and Kai Liu. 2022. "A TDMA-Based MAC Protocol for Mitigating Mobility-Caused Packet Collisions in Vehicular Ad Hoc Networks" Sensors 22, no. 2: 643. https://doi.org/10.3390/s22020643

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