Table 3 (Cont.)
Measurement Function
Item
Specification
Alarm/control
The RU reports an alarm when the following status changes occur on the RU. The 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 Attempt
Table 4
ORAN
Item
Specification
Synchronization
The RU supports the following standards:
▪
Telecom Slave Clock (T-TSC) to G8275.1. RU provides additional noise filtering to filter 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
upgrading
< 90 sec
Service interruption is defined 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 Specifications
22
Release 1.0
·
Issue 1.1, May 2021
Fujitsu and Fujitsu Customer Use Only