An Overview of Channel Access Technologies for 3GPP 5G Sidelink in Unlicensed Bands 


Vol. 50,  No. 2, pp. 257-267, Feb.  2025
10.7840/kics.2025.50.2.257


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  Abstract

This paper describes the channel access technology for Sidelink-unlicensed (SL-U), standardized in 3GPP (the 3rd Generation Partnership Project) to operate a sidelink, which is direct communications between terminals, in unlicensed bands. The channel access technology for SL-U is an essential technology by which a terminal occupies a channel usage authority in the unlicensed band. Since only the device having the corresponding authority can use the channel, a collision that may occur within the channel is mitigated, and the coexistence between various technologies and devices in the unlicensed band becomes possible. Therefore, in this paper, the creation and sharing of the channel usage authority, and the background of the introduction and the design process accordingly is explained in detail.

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[IEEE Style]

I. Cho, S. Jung, S. Choi, "An Overview of Channel Access Technologies for 3GPP 5G Sidelink in Unlicensed Bands," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 2, pp. 257-267, 2025. DOI: 10.7840/kics.2025.50.2.257.

[ACM Style]

Ik-hyun Cho, So-yeon Jung, and Su-han Choi. 2025. An Overview of Channel Access Technologies for 3GPP 5G Sidelink in Unlicensed Bands. The Journal of Korean Institute of Communications and Information Sciences, 50, 2, (2025), 257-267. DOI: 10.7840/kics.2025.50.2.257.

[KICS Style]

Ik-hyun Cho, So-yeon Jung, Su-han Choi, "An Overview of Channel Access Technologies for 3GPP 5G Sidelink in Unlicensed Bands," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 2, pp. 257-267, 2. 2025. (https://doi.org/10.7840/kics.2025.50.2.257)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880