Improved Spectral Efficiency and Connectivity in RSMA based 5G V2X Systems
DOI:
https://doi.org/10.4108/ew.v9i6.3143Keywords:
Rate Splitting, Multiple Access, V2X, Spectral Efficiency, RSMA, ConnectivityAbstract
Vehicle to everything (V2X) faces several challenges including high data rate, low latency and stable connectivity requirements. Due to increased number of connected vehicles, Interference too appears to be a serious issue in V2X systems. Consequently, careful selection of multiple access techniques can lead to improved interference mitigation together with higher spectral efficiency and data rate. Vehicle mobility with growing traffic density is a demanding task that affects probability of vehicle connectivity, thereby resulting into requirement of sustained vehicle linkage for ongoing traffic safety. In this regard, our paper employs Rate Splitting Multiple Access (RSMA) technique, which considers change of both channel strength and direction for improved interference mitigation leading towards enhanced spectral efficiency. RSMA is optimized for weighted sum rate, further; it is integrated with mobility management to demonstrate sustained connectivity in the presence of increased traffic density. Presented results have been found promising, both in terms of spectral efficiency and stable connectivity. RSMA 5G V2X outperformed at higher Signal to noise ratio (SNR) values and on average achieved 25% better spectral efficiency compared to Non Orthogonal Multiple Access (NOMA) technique.
Downloads
References
H. Bagheri et al., "5G NR-V2X: Toward Connected and Cooperative Autonomous Driving," in IEEE Communications Standards Magazine, vol. 5, no. 1, pp. 48-54, March 2021, doi: 10.1109/MCOMSTD.001.2000069. DOI: https://doi.org/10.1109/MCOMSTD.001.2000069
B. Di, L. Song, Y. Li and Z. Han, "V2X Meets NOMA: Non-Orthogonal Multiple Access for 5G-Enabled Vehicular Networks," in IEEE Wireless Communications, vol. 24, no. 6, pp. 14-21, Dec. 2017, doi: 10.1109/MWC.2017.1600414. DOI: https://doi.org/10.1109/MWC.2017.1600414
A. Alalewi, I. Dayoub and S. Cherkaoui, "On 5G-V2X Use Cases and Enabling Technologies: A Comprehensive Survey," in IEEE Access, vol. 9, pp. 107710-107737, 2021, doi: 10.1109/ACCESS.2021.3100472. DOI: https://doi.org/10.1109/ACCESS.2021.3100472
F. Zhang, M. M. Wang, S. Chen, L. Shan, M. Xiao and M. Xu, "Applying NOMA to NR V2X: A Graph-based Matching and Cooperative Game Approach," 2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring), 2021, pp. 1-5, doi: 10.1109/VTC2021-Spring51267.2021.9449051. DOI: https://doi.org/10.1109/VTC2021-Spring51267.2021.9449051
D. -T. Do, M. -S. V. Nguyen, A. -T. Le, K. M. Rabie and J. Zhang, "Joint Full-Duplex and Roadside Unit Selection for NOMA-Enabled V2X Communications: Ergodic Rate Performance," in IEEE Access, vol. 8, pp. 140348-140360, 2020, doi: 10.1109/ACCESS.2020.3012976. DOI: https://doi.org/10.1109/ACCESS.2020.3012976
O. Dizdar, Y. Mao and B. Clerckx, "Rate-Splitting Multiple Access to Mitigate the Curse of Mobility in (Massive) MIMO Networks," in IEEE Transactions on Communications, vol. 69, no. 10, pp. 6765-6780, Oct. 2021, doi: 10.1109/TCOMM.2021.3098695. DOI: https://doi.org/10.1109/TCOMM.2021.3098695
A. Bansal, K. Singh, B. Clerckx, C. -P. Li and M. -S. Alouini, "Rate-Splitting Multiple Access for Intelligent Reflecting Surface Aided Multi-User Communications," in IEEE Transactions on Vehicular Technology, vol. 70, no. 9, pp. 9217-9229, Sept. 2021, doi: 10.1109/TVT.2021.3102212. DOI: https://doi.org/10.1109/TVT.2021.3102212
M. H. C. Garcia et al., "A Tutorial on 5G NR V2X Communications," in IEEE Communications Surveys & Tutorials, vol. 23, no. 3, pp. 1972-2026, third quarter 2021, doi: 10.1109/COMST.2021.3057017. DOI: https://doi.org/10.1109/COMST.2021.3057017
C. Campolo, A. Molinaro, A. O. Berthet and A. Vinel, "On Latency and Reliability of Road Hazard Warnings Over the Cellular V2X Sidelink Interface," in IEEE Communications Letters, vol. 23, no. 11, pp. 2135-2138, Nov. 2019, doi: 10.1109/LCOMM.2019.2931686. DOI: https://doi.org/10.1109/LCOMM.2019.2931686
M. K. Abdel-Aziz, S. Samarakoon, M. Bennis and W. Saad, "Ultra-Reliable and Low-Latency Vehicular Communication: An Active Learning Approach," in IEEE Communications Letters, vol. 24, no. 2, pp. 367-370, Feb. 2020, doi: 10.1109/LCOMM.2019.2956929. DOI: https://doi.org/10.1109/LCOMM.2019.2956929
Y. Mao, O. Dizdar, B. Clerckx, R. Schober, P. Popovski, and H. Vincent Poor," Rate Splitting Multiple Access: Fundamentals, Survey, and Future Research Trends," arXiv:2201.03192, 2022. DOI: https://doi.org/10.1109/COMST.2022.3191937
G. A. Safdar and K. Kanwal, "Euclidean Geometry Axioms Assisted Target Cell Boundary Approximation for Improved Energy Efficacy in LTE Systems," in IEEE Systems Journal, vol. 13, no. 1, pp. 270-278, March 2019, doi: 10.1109/JSYST.2017.2760357. DOI: https://doi.org/10.1109/JSYST.2017.2760357
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2023 EAI Endorsed Transactions on Energy Web
This work is licensed under a Creative Commons Attribution 3.0 Unported License.
This is an open-access article distributed under the terms of the Creative Commons Attribution CC BY 3.0 license, which permits unlimited use, distribution, and reproduction in any medium so long as the original work is properly cited.
