Dynamic Cooperative MAC Optimization in RSU-Enhanced VANETs: A Distributed Approach
Abstract: This paper presents an optimization approach for cooperative Medium Access Control (MAC) techniques in Vehicular Ad Hoc Networks (VANETs) equipped with Roadside Unit (RSU) to enhance network throughput. Our method employs a distributed cooperative MAC scheme based on Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol, featuring selective RSU probing and adaptive transmission. It utilizes a dual timescale channel access framework, with a large-scale'' phase accounting for gradual changes in vehicle locations and asmall-scale'' phase adapting to rapid channel fluctuations. We propose the RSU Probing and Cooperative Access (RPCA) strategy, a two-stage approach based on dynamic inter-vehicle distances from the RSU. Using optimal sequential planned decision theory, we rigorously prove its optimality in maximizing average system throughput per large-scale phase. For practical implementation in VANETs, we develop a distributed MAC algorithm with periodic location updates. It adjusts thresholds based on inter-vehicle and vehicle-RSU distances during the large-scale phase and accesses channels following the RPCA strategy with updated thresholds during the small-scale phase. Simulation results confirm the effectiveness and efficiency of our algorithm.
- A. Gholoamhosseinian and J. Seitz, “A comprehensive survey on cooperative intersection management for heterogeneous connected vehicles,” IEEE Access, vol. 10, pp. 7937–7972, 2022.
- B. Ko, K. Liu, S. H. Son, and K. J. Park, “RSU-assisted adaptive scheduling for vehicle-to-vehicle data sharing in bidirectional road scenarios,” IEEE Trans. Intell. Transp. Syst., vol. 22, no. 2, pp. 977–989, 2021.
- B. L. Nguyen, D. T. Ngo, N. H. Tran, M. N. Dao, and H. L. Vu, “Dynamic V2I/V2V cooperative scheme for connectivity and throughput enhancement,” IEEE Trans. Intell. Transp. Syst., vol. 23, no. 2, pp. 1236–1246, 2022.
- E. Moradi-Pari, D. Tian, M. Bahramgiri, S. Rajab, and S. Bai, “DSRC versus LTE-V2X: Empirical performance analysis of direct vehicular communication technologies,” IEEE Trans. Intell. Transp. Syst., vol. 24, no. 5, pp. 4889–4903, 2023.
- Z. Wei, J. Su, B. Zhao, and X. Lu, “Distributed opportunistic scheduling in cooperative networks with RF energy harvesting,” IEEE/ACM Trans. Networking, vol. 28, no. 5, pp. 2257–2270, 2020.
- T. Kimura, “Performance analysis of cellular-relay vehicle-to-vehicle communications,” IEEE Trans. Veh. Technol., vol. 70, no. 4, pp. 3396–3411, 2021.
- S. Atapattu, N. Ross, Y. Jing, Y. He, and J. S. Evans, “Physical-layer security in full-duplex multi-hop multi-user wireless network with relay selection,” IEEE Trans. Wireless Commun., vol. 18, no. 2, pp. 1216–1232, 2019.
- H. Inaltekin, S. Atapattu, and J. S. Evans, “Optimum location-based relay selection in wireless networks,” IEEE Trans. Inform. Theory, vol. 67, no. 9, pp. 6223–6242, 2021.
- Y. Fang, S. Atapattu, H. Inaltekin, and J. Evans, “Optimum reconfigurable intelligent surface selection for wireless networks,” IEEE Trans. Inform. Theory, vol. 70, no. 9, pp. 6241–6258, 2022.
- J. Xie, Z. Zhang, S. Atapattu, Y. Ye, and H. Zhang, “Optimal secure channel access in distributed cooperative networks with untrusted relay,” IEEE Wireless Commun. Lett., 2023.
- V. Loginov, E. Khorov, A. Lyakhov, and F. Akyildiz, “CR-LBT: Listen-before-talk with collision resolution for 5G NR-U networks,” IEEE Trans. Mob. Comput., vol. 21, no. 9, pp. 3138–3149, Sep. 2022.
- T. Ferguson. Optimal stopping and applications. Mathematics Department, UCLA. [Online]. Available: https://www.math.ucla.edu/tom/Stopping/Contents.html
- P. Santi, “Mobility models for next generation wireless networks.” New York: Wiley, Sep. 2012.
Paper Prompts
Sign up for free to create and run prompts on this paper using GPT-5.
Top Community Prompts
Collections
Sign up for free to add this paper to one or more collections.