Fujitsu 5GRUDB3 - Page 22

Table 3 (Cont.)
Measurement Function
Item Specication
Alarm/control e RU reports an alarm when the following status changes occur on the RU. e RU provides alarm to the
EMS, in case of the RU HW failure.
▪ TX Power status change
▪ Cold start
▪ Fronthaul Port Status Change
▪ Node Shutdown
▪ Channel Frequency Change
▪ RU Parameter Change
▪ Node Voltage out-of-range condition
▪ Node Temperature out-of-range condition
▪ RU generates high-temperature, low-temperature and shutdown temperature alarms, which report to the
EMS.
▪ Sync status changes (fail, not locked, or out-of-sync, disabled)
▪ Node Synchronization Lock Status Changed
▪ Node Internal Clock Status Change
▪ Node PTP Master/Slave Status Change
▪ RU Local Access Aempt
Table 4
ORAN
Item Specication
Synchronization e R
U supports the following standards:
▪ Telecom Slave Clock (T-TSC) to G8275.1. RU provides additional noise ltering to lter front-haul interface
dynamic noise, which helps to meet 3GPP frequency accuracy requirement
▪ RU maintains sync holdover with SyncE, in case of GPS or IEEE 1588 loss for 24 hours.
▪ RU supports G.8275.1 synchronization.
▪ RU supports IEEE 1914.1, ITU-T G.826x, G.827x series.
▪ RU can connect to a DU on site located remotely in a data center as far as 200 microseconds away.
Internet protocol RU supports IPv4 and IPv6.
Service interruption at SW
up
grading
< 90 sec
Service interruption is dened as the preparation for the RU to establish the M/S-Plane with the host device.
Mean Time Between
Failures (MTBF)
> 175,320 hours at RU internal temperature.
RU MTBF exceeds 20 years or higher.
YRR (FRR) < 2%
RU Hardware Feature
RU Specications
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Release 1.0 · Issue 1.1, May 2021
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