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On the Impact of Re-Evaluation in 5G NR V2X Mode 2
Open accessAbstract
5G NR V2X has been designed to support advanced connected and automated driving V2X services. These services are characterized by variable traffic patterns that can generate packet collisions in decentralized systems where vehicles autonomously select their radio resources like 5G NR V2X mode 2. 5G NR V2X introduces a re-evaluation mechanism at the MAC layer to detect and avoid possible packet collisions before a vehicle transmits in selected resources. Most of the studies conducted to date on 5G NR V2X do not consider the re-evaluation mechanism despite being a mandatory MAC feature. This paper advances the state of the art with an in-depth analysis and evaluation of the operation and performance of re-evaluation in 5G NR V2X mode 2 under different traffic patterns and mode 2 configurations. The study shows that re-evaluation is effective in avoiding collisions with periodic traffic but its effectiveness decreases with aperiodic traffic and of variable size. The study also shows that re-evaluation is effective in avoiding collisions generated by the retransmission of packets. However, its overall impact on the performance of 5G NR V2X mode 2 is small, while it can have a relevant implementation cost due to the frequent re-evaluation checks and resource reselections. This raises questions on the current design of the re-evaluation mechanism that is a mandatory feature in 5G NR V2X mode 2.
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Despite its mandatory requirement in rel16, only a few works incorporate a re-evaluation feature for mode 2 scheduling.
“Despite its mandatory requirement in rel16, only a few works incorporate a re-evaluation feature for mode 2 scheduling, such as in [61], [62], [63].”
From Leveraging 3GPP Features and Optimization Techniques for 5G NR-V2X Resource Allocation: A Survey (2025) · cites this paper as [62]
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Research works printed but not linked: 12
- 10.1109/COMST.2021.3057017 · DOI · Paper page
- 10.1109/ACCESS.2020.3038307 · DOI
- 10.1109/ACCESS.2020.3007115 · DOI
- 10.1109/TVT.2022.3170982 · DOI
- 10.1109/ACCESS.2021.3090855 · DOI
- 10.1109/ACCESS.2021.3121151 · DOI
- 10.1109/IEEECONF53345.2021.9723155 · DOI · Paper page
- Saad, Enhanced semi-persistent scheduling (e-SPS) for aperiodic traffic in NR-V2X, 171
- 10.1109/IVS.2019.8813806 · DOI
- 10.1109/IVS.2019.8814044 · DOI
- 10.1109/HPSR54439.2022.9831314 · DOI
- 10.1109/TVT.2018.2888704 · DOI
Cited by
Sorted by citations
Li, Z., Wang, P., Shen, Y., & Li, S. (2025) · Sensors · doi:10.3390/s25020302 · Cited by 15
Leveraging 3GPP Features and Optimization Techniques for 5G NR-V2X Resource Allocation: A Survey
Bin Ali Wael, C., Hadj Dogheche, E., Armi, N., Subekti, A., & Dayoub, I. (2025) · IEEE Open Journal of Intelligent Transportation Systems · doi:10.1109/ojits.2025.3584024 · Cited by 10
“Despite its mandatory requirement in rel-16, only a few works incorporate a re-evaluation feature for mode 2 scheduling, such as in [61], [62], [63].”
Improving NR-V2X Autonomous Mode Through Resource Re-Evaluation
Todisco, V., Wu, Z., & Bazzi, A. (2024) · 2024 IEEE Vehicular Networking Conference (VNC) · doi:10.1109/vnc61989.2024.10575973 · Cited by 8
Performance Evaluation of 5G New Radio V2X Sidelink for Coexisting Traffic
Guerra, J., Luís, M., & Rito, P. (2025) · IEEE Access · doi:10.1109/access.2025.3590868 · Cited by 4
Metadata
- Authors
- Molina-Galan, A., Lusvarghi, L., Coll-Perales, B., Gozalvez, J., & Merani, M. L.
- Affiliations
- Universitat de Miguel Hernández d'Elx (ES)
- University of Modena and Reggio Emilia (IT)
- UWICORE Laboratory, Universidad Miguel Hernandez de Elche, Elche, Spain
- ORCID
- Venue
- IEEE Transactions on Vehicular Technology
- Published
- 2024-02
- Volume
- 73
- Issue
- 2
- Pages
- 2669-2683
- ISSN
- 0018-9545 (ISSN-L)
- 1939-9359
- OpenAlex
- W4386952200
- Cited by
- 28
- References
- 0
- Citations by year
- 2026: 9 · 2025: 13 · 2024: 6
- FWCI
- 2.08
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- IEEE Transactions on Vehicular Technology (publishedVersion, cc-by)
- IRIS UNIMORE (University of Modena and Reggio Emilia) (submittedVersion, other-oa)
- Funders
- UMH (MCIN/AEI/10.13039/501100011033, IJC2018-036862-I, PID2020-115576RB-I00)
- Ministry of Universities (FPU18/00691)
- Generalitat Valenciana (CIGE/2021/096)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Vehicular Ad Hoc Networks (VANETs)
- Physical Sciences › Engineering › Control and Systems Engineering › Traffic control and management
- Physical Sciences › Computer Science › Computer Networks and Communications › Wireless Networks and Protocols
- Keywords
- 5G NR-V2X, MAC layer, packet collision avoidance, connected and automated driving, packet retransmission, traffic patterns
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