An Overview of Mobility Enhancement Technologies for 5G-Advanced Non-Terrestrial Networks (NTN) 


Vol. 50,  No. 12, pp. 1846-1854, Dec.  2025
10.7840/kics.2025.50.12.1846


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  Abstract

This paper analyzes and describes the mobility enhancement technologies standardized in 3GPP Release 18, corresponding to the 5G-Advanced specifications, for Non-Terrestrial Networks (NTNs). In particular, it provides a detailed discussion of key technologies such as NTN-TN mobility, RACH-less handover in NTN environments, satellite switch with re-synchronization, cell measurement methods and triggering events in moving-cell scenarios, and conditional handover enhancements. Furthermore, the paper examines the improvements introduced compared to previous Releases, and explains the concepts, protocol procedures, and future development directions of each technology.

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[IEEE Style]

S. Park, J. Kim, J. Lee, H. Park, J. Chang, S. Choi, "An Overview of Mobility Enhancement Technologies for 5G-Advanced Non-Terrestrial Networks (NTN)," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 12, pp. 1846-1854, 2025. DOI: 10.7840/kics.2025.50.12.1846.

[ACM Style]

Soyeon Park, Jaewoo Kim, Jongman Lee, Hyun Park, Jinyeong Chang, and Suhan Choi. 2025. An Overview of Mobility Enhancement Technologies for 5G-Advanced Non-Terrestrial Networks (NTN). The Journal of Korean Institute of Communications and Information Sciences, 50, 12, (2025), 1846-1854. DOI: 10.7840/kics.2025.50.12.1846.

[KICS Style]

Soyeon Park, Jaewoo Kim, Jongman Lee, Hyun Park, Jinyeong Chang, Suhan Choi, "An Overview of Mobility Enhancement Technologies for 5G-Advanced Non-Terrestrial Networks (NTN)," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 12, pp. 1846-1854, 12. 2025. (https://doi.org/10.7840/kics.2025.50.12.1846)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880