Scheduling Latency of Midhaul-based Commodity Hardware C-RAN

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A4 Artikkeli konferenssijulkaisussa
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Date

2021-11-19

Department

Department of Communications and Networking

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Mcode

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Language

en

Pages

6
7-12

Series

2021 IEEE 4th 5G World Forum (5GWF)

Abstract

The impact of midhaul-induced latency on the performance of a wireless communication system must be understood in order to be appropriately accounted for. To this end, we study the impact of midhaul delay and jitter on the scheduling of a cloud radio access network. A soft–real-time commodity hardware testbed is used to gather data using up to 16 virtualized distributed units. The empirical data is used to develop models to analyze the midhaul latency’s impact on spectral efficiency and outage probability. Modeling takes into account the burstiness of deadline misses in order to replicate outage duration in addition to frequency. The recorded data is then used to derive an estimate of system scaling in terms of shortest transmission time interval supported for a set number of distributed units for a given deadline miss rate. Results show that scaling behavior depends on the target rate. More stringent targets emphasize the impact of tail latencies. The testbed suffers less than 0.1 % spectral efficiency loss from deadline misses at a transmission time interval duration of 500 μs with 16 distributed units.

Description

| openaire: EC/H2020/815191/EU//PriMO-5G

Keywords

C-RAN, SDR, midhaul, scheduling

Other note

DOI

10.1109/5GWF52925.2021.00009

Citation

Malm, N & Tirkkonen, O 2021, Scheduling Latency of Midhaul-based Commodity Hardware C-RAN . in Proceedings - 2021 IEEE 4th 5G World Forum, 5GWF 2021 . IEEE, pp. 7-12, IEEE 5G World Forum, Montreal, Canada, 13/10/2021 . https://doi.org/10.1109/5GWF52925.2021.00009

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https://urn.fi/URN:NBN:fi:aalto-2021121510726

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[article-cris] Sähkötekniikan korkeakoulu / ELEC