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Conference object . 2023
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Functional Split Evaluation in NTN for LEO Satellites

Authors: Rashid, Khouli; Leo, Frank; Alexander, Hofmann;

Functional Split Evaluation in NTN for LEO Satellites

Abstract

Functional split over non-terrestrial networks (NTN) is one of the key-enabling technologies in the next 5G+ and 6G networks, which allows the implementation of virtualized radio access network (vRAN), and the recent open RAN (ORAN) in NTN. Functional split is based on splitting the RAN functionalities into a centralized unit (CU) and a distributed unit (DU), aiming at reducing the processing requirements at the DU located close to the antenna. Even though functional split has been standardized and evaluated for terrestrial networks, its applicability in NTN has not been discussed up to now. Functional split is expected to be part of 3GPP NTN Rel-19, where regenerative payload is expected to be introduced in a new working item at the time of writing this paper. This work evaluates the different split options in NTN for low earth orbit (LEO) satellites based on NTN key performance indicators (KPIs) and highlights the challenges that hinders the implementation of functional splits in NTN. A new architecture is proposed to facilitate the implementation of functional splits in NTN while gaining the desired advantages compared to a transparent payload or a full gNB onboard.

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  • citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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