Publication: Impact of Virtualization Technologies on Virtualized RAN Midhaul Latency Budget: A Quantitative Experimental Evaluation
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ISSN: 1558-2558
Publication date
2019-02-14
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IEEE
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Abstract
In the Next Generation Radio Access Network (NGRAN)
defined by 3GPP for the fifth generation of mobile
communications (5G), the next generation NodeB (gNB) is split
into a Radio Unit (RU), a Distributed Unit (DU), and a Central
Unit (CU). RU, DU, and CU are connected through the fronthaul
(RU-DU) and midhaul (DU-CU) segments. If the RAN is also
virtualised RAN (VRAN), DU and CU are deployed in virtual
machines or containers. Different latency and jitter requirements
are demanded on the midhaul according to the distribution of
the protocol functions between DU and CU.
This study shows that, in VRAN, the virtualisation technologies,
the functional split option, and the number of elements
deployed in the same computational resource affect the latency
budget available for the midhaul. Moreover, it provides an
expression for the midhaul allowable latency as a function of the
aforementioned parameters. Finally, it shows that, the virtualised
DUs featuring a lower layer split option shall be deployed not
in the same
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Keywords
5G, Functional split, Fronthaul, Midhaul, Virtualisation
Bibliographic citation
Giannone, F., Kondepu, K., Gupta, H., Civerchia, F., Castoldi, P., Franklin, A. A. y Valcarenghi, L. (2019). Impact of Virtualisation Technologies on Virtualised RAN Midhaul Latency Budget: A Quantitative Experimental Evaluation. IEEE Communications Letters, 23 (4), pp. 604-607