Product Description

Nokia MetroSite EDGE Base Station features
DN991444 © Nokia Corporation Draft 27 (98)
Issue 3-0 en Draft Nokia Proprietary and Confidential
3.5 Advanced operation and maintenance
The features concerning the operation and maintenance (O&M) of the Nokia
MetroSite EDGE Base Station are described in this section.
During operation, the Nokia MetroSite EDGE Base Station is managed remotely
from the OSS. Site visits to carry out routine O&M tasks are not usually needed.
3.5.1 Integration of TRX and base control functions (BCF)
One of the TRXs is configured as the master TRX of the BTS. Physically there is
no difference between the master TRX and the slave TRXs. In addition to the
normal TRX functions, the master TRX handles the BTS operation and
maintenance functions. Consequently, there is no need for a dedicated plug-in
unit to handle these functions. For more information refer to Section 6.1.2. The
O&M signalling and TRX signalling can also be combined into one channel to
optimise the use of transmission capacity.
3.5.2 BTS diagnostics, alarms and TRX test
Alarm diagnostics
The Nokia MetroSite EDGE Base Station features a BTS diagnostics system that
considerably reduces the number of alarms. Relevant alarm information is easily
accessible and understandable. A detailed description of the Nokia MetroSite
EDGE Base Station alarms can be found in the software release documentation.
The alarm diagnostics system filters out spurious alarms, reporting only those
alarms that directly affect the BTS service level. The alarms are addressed to the
unit level, which helps the maintenance engineers locate the faulty unit.
In the case of a mains power failure, the Nokia MetroSite EDGE Base Station
provides sufficient backup time for an alarm to be sent to the BSC.
TRX test
The TRX test is a multipurpose test designed for testing the total performance of
the intended TRX and Radio Time Slot (RTS). The test can be run locally from
the Nokia MetroSite BTS Manager, or remotely from the BSC/OSS when the
Abis connection is established. Locally, the TRX test is usually performed during
commissioning of the Nokia MetroSite EDGE Base Station.