Understanding V2X : a physical layer comparison between 5G NR and NR V2X sidelink
Lehtinen, Vesa (2024-06-13)
V. Lehtinen
13.06.2024
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202406144519
https://urn.fi/URN:NBN:fi:oulu-202406144519
Tiivistelmä
This study examines the relevant 3GPP specifications to provide a coherent comparison between the current 5G NR deployments and the NR-V2X sidelink from the point of view of physical layer (L1) software and digital signal processing. The study aims to provide a coherent comparison between these two technologies while also providing an analysis of what kind of implications this new technology has on the physical layer software implementation and the potential problems that should be considered in an NR-V2X implementation. To achieve this, the current 5G NR functionality is compared to NR-V2X functionality using the technical specifications given in 3GPP releases 16 and 17. Some release 18 documents are also considered to point out important upcoming changes which a V2X developer should be aware of, but these are not examined in detail. In short, the study examines the sidelink related changes introduced by NR-V2X specifications in contrast to existing base station-to-UE NR communications.
The findings of this study indicate that NR-V2X sidelink largely re-uses the concepts and techniques present in 5G NR communications. Based on the L1 comparison, it could be said that NR-V2X is essentially a simplified version of the existing 5G NR, with some V2X specific additions. Although the sidelink communication path reuses many 5G NR concepts, it also introduces many new concepts that an L1 developer should be aware of. The results also indicate that the specification documents include some problem points, such as functionalities that have strict timing requirements, but the proposed algorithms to achieve these functionalities are nondeterministic in their execution time.
This study is carried out as a literature review. More specifically, it follows a narrative literature review approach. The study focuses on industry standard literature, such as the official specifications provided by the 3GPP. Along with the technical specifications provided by the 3GPP, other relevant literature is also examined and used to complement the narrative of the review.
The findings of this study indicate that NR-V2X sidelink largely re-uses the concepts and techniques present in 5G NR communications. Based on the L1 comparison, it could be said that NR-V2X is essentially a simplified version of the existing 5G NR, with some V2X specific additions. Although the sidelink communication path reuses many 5G NR concepts, it also introduces many new concepts that an L1 developer should be aware of. The results also indicate that the specification documents include some problem points, such as functionalities that have strict timing requirements, but the proposed algorithms to achieve these functionalities are nondeterministic in their execution time.
This study is carried out as a literature review. More specifically, it follows a narrative literature review approach. The study focuses on industry standard literature, such as the official specifications provided by the 3GPP. Along with the technical specifications provided by the 3GPP, other relevant literature is also examined and used to complement the narrative of the review.
Kokoelmat
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