Scheduling Latency of Midhaul-based Commodity Hardware C-RAN

Nicolas Malm, Olav Tirkkonen

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference contributionScientificvertaisarvioitu

50 Lataukset (Pure)


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.
OtsikkoProceedings - 2021 IEEE 4th 5G World Forum, 5GWF 2021
ISBN (elektroninen)978-1-6654-4308-1
DOI - pysyväislinkit
TilaJulkaistu - 19 marrask. 2021
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaIEEE 5G World Forum - Montreal, Kanada
Kesto: 13 lokak. 202115 lokak. 2021
Konferenssinumero: 4


ConferenceIEEE 5G World Forum


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