Midhaul Performance Modelling Using Commodity Hardware C-RAN Testbed

Nicolas Malm*, Kalle Ruttik, Olav Tirkkonen

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

40 Lataukset (Pure)

Abstrakti

Midhauls introduce new characteristics to wireless networks. We study implementation performance behaviour to make appropriate network and algorithm design decisions soft–real-time midhaul-based radio access network implementations. A model is developed based on data obtained using a testbed, which can be used to estimate midhaul latency as a function of the number of communicating nodes. The testbed comprises one central unit (CU) controlling a variable number of distributed units (DU) synchronized over Precision Time Protocol (PTP). Average reporting latencies of 266μs were observed with 16 DUs. Typical jitter performance was 99.99 % of values below 471.75μs but maximum values up to an order of magnitude larger. Variations in performance of up to 16.2 times more deadline misses were observed between best and worst performing DUs. A model fitted to the obtained data estimates the latency and jitter of CU-DU communication as a function of the number DUs. Results indicate suitability for application with moderate synchronization requirements, for example positioning, but insufficient for the most stringent uses case such ultra-reliable communication.

AlkuperäiskieliEnglanti
Sivut1339-1363
Sivumäärä25
JulkaisuWireless Personal Communications
Vuosikerta131
Numero2
Varhainen verkossa julkaisun päivämäärä31 toukok. 2023
DOI - pysyväislinkit
TilaJulkaistu - heinäk. 2023
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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