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Re-Evaluation Strategies for 5G NR V2X Communications
Abstract
5G NR V2X introduces novel MAC features to support advanced V2X services for connected and automated driving. One of these features is the re-evaluation mechanism designed to detect and avoid packet collisions. The re-evaluation mechanism checks before every transmission if the selected resources are still available. If another vehicle has selected the same resources, the re-evaluation mechanism triggers a reselection of resources. The 3GPP standard defines different strategies for vehicles to decide when to perform a re-evaluation check, and how many times a re-evaluation check should be executed before the transmission of a packet. This study evaluates for the first time the impact of two standard strategies on the operation and performance of NR V2X mode 2. The evaluation demonstrates that the two strategies offer a balance between transmission latency and computational cost. We then propose an alternative re-evaluation check strategy that can simultaneously reduce the transmission latency and computational cost without actually degrading the reliability of NR V2X mode 2 transmissions.
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In the citing paper
“Several key features in 5G NR-V2X rel-16 for resource allocation mode 2, such as sensing-based semi-persistent scheduling (SPS) and dynamic scheduling (DS) support, reevaluation, and pre-emption, are evaluated in [22], [60], [61], [62], [63].”
From Leveraging 3GPP Features and Optimization Techniques for 5G NR-V2X Resource Allocation: A Survey (2025) · cites this paper as [61]
In the citing paper
“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 [61]
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Cites
No references could be resolved yet.
Research works printed but not linked: 9
- 2019, TR 37.885 Study on evaluation methodology of new Vehicle-to-Everything use cases for LTE and NR, Tech Rep
- molina-galan, 2022, How Does 5G NR V2X Mode 2 Handle periodic Packets and Variable Packet Sizes?, Proc IEEE HPSR 2022, 183
- 2019, V2X Functional and Performance Test Report; Test Procedures and Results, Tech Report
- 2022, TS 38.214 NR; Physical layer procedure for data (v16.8.0, Release 16), Tech spec
- 0, R1-1903180. Link level evaluations of NR PSCCH, 3GPP WG1 Meeting #96
- huawei, 2019, R1-1900852. Link level evaluations on sidelink for NR V2X, 3GPP WG1 Ad-Hoc Meeting 1901
- 2022, TS 38.321 NR; Medium Access Control (MAC) protocol specification (v16.7.0, Release 16), Tech spec
- 10.1109/ACCESS.2021.3121151 · DOI
- 10.1109/COMST.2021.3057017 · DOI · Paper page
Cited by
Sorted by citations
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
Metadata
- Authors
- Molina-Galan, A., Coll-Perales, B., & Gozalvez, J.
- Affiliations
- Universitat de Miguel Hernández d'Elx (ES)
- Universidad Miguel Hernández de Elche,UWICORE laboratory,Elche (Alicante),Spain.
- Venue
- 2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)
- Publisher
- IEEE
- Published
- 2022-09
- Pages
- 1-5
- ISSN
- 1090-3038 (ISSN-L)
- OpenAlex
- W4317419758
- Cited by
- 6
- References
- 0
- Citations by year
- 2025: 1 · 2024: 3 · 2023: 2
- FWCI
- 2.43
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- IEEE Vehicular Technology Conference (publishedVersion)
- 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 › Engineering › Civil and Structural Engineering › Road Transport and Highway Systems
- Keywords
- 5G NR-V2X, packet collision avoidance, MAC layer, connected and automated driving, transmission latency, computational cost
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