User's Manual

Mobile WiMAX RAS SPI-2213 System Description/Ed.02

3.3.3.8 Universal Loading Management (ULM)

ULM downloads and executes the packages that are identified in the file list downloaded

by loader during pre-loading process. Also, ULM monitors the executed software and

provides the running software information, and supports the restart and the software upgrade

by the command. In addition, in the initialization stage, ULM sets the system time by using

the Time of Date information obtained from a GPS receiver and periodically performs the

synchronization with the NTP server by actuating as an NTP client after the loading is

completed.

ULM Main Functions

y System initialization and reset

− System reset by command

− Act as internal RS & IS of lower board

y Software management

− Monitor the operation of software block and restart the software block in abnormal

state

− Software restart by command

− Provide information on software block and the status

y Inventory Management

− ULM provides the information such as the software version for the components,

the PBA ID, the PBA version and the serial number, etc.

− Function of reporting the inventory information when performing the initialization,

adding and extending the components

y Online upgrade and version management for the software

ULM provides the functions of updating the software and the firmware, upgrading the

package and managing the version.

y System time information synchronization

Synchronize system time information with NTP server as a NTP client and transmit

the time information to the lower boards

y Time Zone setup

Setup Time Zone and Daylight Saving Time (DST)

y Mortem time update

Setup mortem time after system time information synchronization