Mobile WiMAX Outdoor RAS SPI-2331 System Description/Ed.02
© SAMSUNG Electronics Co., Ltd.
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3.3.3.7 Loader
Loader manages the entire process from the start of OS to the previous step of ULM
running(pre-loading). After that, if ULM is actuated after the initialization script is
executed and the registration and loading function is performed, the loader monitors the
ULM block.
The main functions of Loader are as follows:
y
System time setting
Before NTP-based synchronization, the system time is set by receiving the Time of
Date(ToD) from a GPS receiver.
y
Outdoor SPI-2331 registration and loading
−
Registration of the outdoor SPI-2331 to the Registration Server(RS)
−
Determination of the loading method
a) Loading via its own nonvolatile storage
b) Loading via the remote Image Server(IS)
c) Loading as the latest version via the version comparison
y
Backing up and restoring the software image and the PLD
Loader saves the software image and the PLD of the latest version in its own
nonvolatile storage and restores it as the corresponding information when required.
y
ULM monitoring
Loader monitors whether the ULM block operates normally and if it is abnormal, this
restarts it.
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.
The main functions of ULM are as follows:
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
Содержание Mobile WiMAX Outdoor RAS SPI-2331
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