Abstract
AbstractVehicular Ad-hoc Networks (VANETs) can improve the road safety by transmitting safety-critical messages such as beacons and emergency messages. IEEE 802.11p VANETs have adopted the carrier sense multiple access with collision avoidance (CSMA/CA) mechanism for the multiple access control. The 802.11p media access control (MAC) protocol, however, can not guarantee the reliability of broadcasting data, since the reception of transmitted messages are not acknowledged. Moreover, the backoff scheme of the 802.11p MAC utilizes a fixed-size contention window for safety message broadcasting, which causes high collision probabilities especially in dense environments. In order to improve such drawbacks, we propose a hybrid access method as follows: Nodes are equipped to reserve time slots for the next round of broadcasting, while unoccupied time slots are preserved for those which have emergency needs. In addition, implicit feedbacks are enabled for detecting collisions incurred during random channel accesses in preserved time slots. We devise a mathematical model which optimally controls the parameters of our scheme while minimizes the cost caused by idle channels and collisions. Extensive simulations show that our mechanism can remarkably improve the performance of VANETs in broadcasting of the safety messages.
Funder
Yangzhou University Innovation Fund
Basic Science Research Program through the National Research Foundation of Korea
Publisher
Springer Science and Business Media LLC
Subject
Computer Networks and Communications,Computer Science Applications,Signal Processing
Reference26 articles.
1. V. Nguyen, O.T.T. Kim, C. Pham, T.Z. Oo, N.H. Tran, C.S. Hong, E.N. Huh, A survey on adaptive multi-channel MAC protocols in VANETs using Markov models. IEEE Access 6, 16493–16514 (2018)
2. Y.-J. Wu, W.-S. Wang, W.-S. Hwang, A modified backoff algorithm for safety message delivery in IEEE 802.11p/WAVE networks, in Proceedings of the 2014 International Conference on Computer, Information and Telecommunication Systems, pp. 1–5 (2014)
3. H.A. Omar, W. Zhuang, L. Li, VeMAC: a TDMA-based MAC protocol for reliable broadcast in VANETs. IEEE Trans. Mob. Comput. 12(9), 1724–1736 (2013)
4. X. Jiang, D.H.C. Du, PTMAC: a prediction-based TDMA MAC protocol for reducing packet collisions in VANET. IEEE Trans. Veh. Technol. 65(11), 9209–9223 (2016)
5. B. Cao, G. Feng, Y. Li, C. Wang, Cooperative media access control with optimal relay selection in error-prone wireless networks. IEEE Trans. Veh. Technol. 63(1), 252–265 (2014)
Cited by
13 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献