User's Manual

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Chapter 2 LTE eNB Overview

LTE eNB System Description v2.0 23

The eNB also logs the access successes and failures for CLI, login history, and so

on.

Highly-Secured Maintenance

The eNB supports the Simple Network Management Protocol (SNMP) and SSH

File Transfer Protocol (SFTP) for security during communications with LSM, and

Hypertext Transfer Protocol over SSL (HTTPs) and Secure Shell (SSH) during

communications with the console terminal.

Online Software Upgrade

When a software package is upgraded, EPC can upgrade the existing package

while it is still running.

The package upgrade is done by downloading a new package  activating of the

new package. The download and activation of a new package is performed using

the Download and Activation menu of LSM GUI.

When upgrading the package, the service stops temporarily at the ‘change to the

new package’ step because the existing process needs to be stopped so that the

new process can start. Since the operating system does not need to be restarted, the

service can be resumed within several minutes. After upgrading the software, the

eNB updates the package, which is stored in the internal non-volatile storage.

Call Trace

The eNB supports the call trace function for a specific UE.

The operator can enable trace for a specific UE through MME. The trace execution

results such as signaling messages are transmitted to LSM.

OAM Traffic Throttling

The eNB provides the operator with the function for suppressing OAM-related

traffic that can occur in the system using the operator command. At this time, the

target OAM-related traffic includes the fault trap messages for alarm reporting and

the statistics files generated periodically.

In case of fault trap messages, the operator can suppress generation of alarms for

the whole system or some fault traps using the alarm inhibition command,

consequently allowing the operator to control the amount of alarm traffic that is

generated. In case of statistics files, the operator can control the amount of

statistics files by disabling the statistics collection function for each statistics group

using the statistics collection configuration command.