Impact of RAN Virtualization on Fronthaul Latency Budget: An Experimental Evaluation. Giannone, F, Gupta, H, Kondepu, K, Manicone, D, Franklin, A, Castoldi, P, & Valcarenghi, L Technical Report 2017. arXiv: 1708.00366v2abstract bibtex In 3GPP the architecture of a New Radio Access Network (New RAN) has been defined where the evolved NodeB (eNB) functions can be split between a Distributed Unit (DU) and Central Unit (CU). Furthermore, in the virtual RAN (VRAN) approach, such functions can be virtualized (e.g., in simple terms, deployed in virtual machines). Based on the split type, different performance in terms of capacity and latency are requested to the network (i.e., fronthaul) connecting DU and CU. This study experimentally evaluates, in the 5G segment of the Advanced Research on NetwOrking (ARNO) testbed (ARNO-5G), the fronthaul latency requirements specified by Standard Developing Organizations (SDO) (3GPP in this specific case). Moreover it evaluates how much virtualization impacts the fronthaul latency budget for the the Option 7-1 functional split. The obtained results show that, in the considered Option 7-1 functional split, the fronthaul latency requirements are about 250 µs but they depend on the radio channel bandwidth and the number of the connected UEs. Finally virtualization further decreases the latency budget.
@techreport{giannone_impact_2017,
title = {Impact of {RAN} {Virtualization} on {Fronthaul} {Latency} {Budget}: {An} {Experimental} {Evaluation}},
abstract = {In 3GPP the architecture of a New Radio Access Network (New RAN) has been defined where the evolved NodeB (eNB) functions can be split between a Distributed Unit (DU) and Central Unit (CU). Furthermore, in the virtual RAN (VRAN) approach, such functions can be virtualized (e.g., in simple terms, deployed in virtual machines). Based on the split type, different performance in terms of capacity and latency are requested to the network (i.e., fronthaul) connecting DU and CU. This study experimentally evaluates, in the 5G segment of the Advanced Research on NetwOrking (ARNO) testbed (ARNO-5G), the fronthaul latency requirements specified by Standard Developing Organizations (SDO) (3GPP in this specific case). Moreover it evaluates how much virtualization impacts the fronthaul latency budget for the the Option 7-1 functional split. The obtained results show that, in the considered Option 7-1 functional split, the fronthaul latency requirements are about 250 µs but they depend on the radio channel bandwidth and the number of the connected UEs. Finally virtualization further decreases the latency budget.},
author = {Giannone, F and Gupta, H and Kondepu, K and Manicone, D and Franklin, A and Castoldi, P and Valcarenghi, L},
year = {2017},
note = {arXiv: 1708.00366v2},
keywords = {CU, DU, Index Terms-5G, NGFI, functional split, testbed},
}
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