Reference Manual

Diagnostics and Fault Handling
41.3.2 Fault Evaluation
Purpose
Detected faults are evaluated to determine the underlying fault.
Preconditions and initiation
A change in fault status for HWU or a RU.
Description
This function evaluates the input fault maps and tries to find out the
actual fault cause. This is done by analyzing faults reported on a low
level (specified hardware units) and mapping them to a high level (RUs
and MOs), thus taking the complete fault situation into account.
41.3.3 Fault Classification
Purpose
The fault classification subfunction decides the severity of the fault,
whether it affects functionality of the MO or not and also if the fault is
internal or external.
Preconditions and initiation
The fault filtering function or the fault evaluation has detected or ceased
a fault.
Description
Faults detected by an MO are classified according to:
•
Severity
− Either affects (may affect) functionality of the MO or
does not affect functionality of the MO
• Fault origin
−
Either internal or external to the MO
− Either internal or external to the RBS
41.4 Fault Localization
Purpose
This function is used to localize a detected fault to possible faulty RU.
Preconditions and initiation
The fault detection function has found a change in fault status for a RU.
318 (421)
EN/LZT 720 0008 R1A
2001-06-26
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