Document Title Security Level
2006-10-04 HUAWEI Confidential Page19, Total35
Protection against Excessive Rise in Temperature of the DTRU
When the temperature around the last level power amplifier is too high, the power
amplifier reports the excessive rise in temperature through an alarm, and then
enters into the automatic protection state.
Reliability Design for Power Supply
z The power supply has the lightning protection function and the protection
function against voltage variation.
z The BTS3012 provides the power failure protection for programs and key
data.
z The boards provide protection against excessive voltage and current.
z The boards provide protection against reverse-polarity connection.
Excellent Lightning Protection Design
The BTS3012 needs no external lightning protection device. The antenna ports of
the DDPU have the 8KA/40KA lightning protection capability. The lightning
protection of the BTS3012 is implemented by directly connecting the conductor
inside the DDPU antenna ports to the ground.
6.3 Software Reliability
Software reliability is reflected in the powerful capability of error tolerance. The
entire system will not get corrupted when the software fails. That is, the system
has self-healing capability. Error tolerance of the BTS3012 is shown in the
following aspects.
Regular Check on Key Resources
Seizure check is conducted on various software resources in the system. The
check mechanism can ensure the release of hung-up resources and the output of
the related logs and alarms.
Task Monitoring
When the software is active, the task monitoring function can monitor any
possible fault in the software or hardware. In addition, detected faults can be
reported. Task status and system abnormalities can also be monitored.
Data Check
The system can perform regular or event-driven checks on data consistency,
restore the data consistency selectively or preferably and output related logs and
alarms.
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