Zte ZXSDR BS8800 - Page 17

Chapter 1 Product Overview
Software
Reliability
2. Module in-position detection function
CC communicates with each module to judge the normality of
their operation, and implements in-position detection of CH,
PS and SA modules via backplane or connection of Baseband
part for higher reliability.
3. Module reverse insertion prevention function
if it is inserted upside down, the module fails to contact the
backplane normally so as to protect the equipment from dam-
age.
4. Power over-voltage, over-current and inverse connection pro-
tection function
5. Backup strategy
� CC module supports the operation mode of 1+1 master
slave hot backup.
� BBU adopts the concept of resource pool. Baseband mod-
ule conducts load sharing.
� FS module supports load sharing.
6. Quality attribute design
� Loose coupling in system design of RF, baseband and con-
trolling parts in view of their separation to prevent cross
interference
� -48V distributed power supply with lightning proof design
� Failure remote location, a better mode for field hard fault
and graceful failure.
� Reliable grounding design
� Consideration of structure, hot design and overall wiring
� Simplification and error protection design
Software reliability lies mainly in the following items.
1. Software operation support reliability
� Collects periodical statistics of task CPU occupancy and
heap.
� Monitors abnormal status such as system CPU overload,
task endless loop, suspension and dead lock.
� Captures various CPU abnormality and processes accord-
ingly.
� Provides reset log and black box and records the field infor-
mation when board software failure happens for the con-
venience of failure location.
2. Database management reliability
� Provides abnormality report mechanism and notifies the
user of detailed failure reason when configuring base sta-
tion with OMC software.
� Checks the consistency of NE and OMC data via overall con-
figuration, data uploading and data increment synchroniza-
tion.
� Master slave hot backup to keep consistent data via overall
data synchronization and increment synchronization.
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