User's Manual

Mobile WiMAX Indoor RAS SPI-2210 System Description/Ed.07
© SAMSUNG Electronics Co., Ltd. 4-30
4.4 Loading Message Flow
Loading is the procedure to download the software execution files and the data from the IS,
which are required to perform each function of each processor and each device of the
indoor SPI-2210. Loading the indoor SPI-2210 is performed in the procedure of initializing
the system. In addition, if a specific board is mounted on the system or the hardware is
reset, or if the operator of the upper management system reboots a specific board, loading
is performed.
Loading is classified into two types, one is loading by using its own nonvolatile storage
and the other is loading by using the remote IS. When the system is initialized for the first
time, the indoor SPI-2210 receives the loading by using the remote IS, and after this, saves
the corresponding information in the internal storage, and backs up the recent information
periodically, and then it is available to avoid unnecessary loading. After the first
initialization, if the information saved in its own storage is the recent information by
comparing the version, the indoor SPI-2210 does not receive the remote loading.
The loaded information includes the software image which is configured with the execution
file and the script file, the configuration information, the PLD related to the operation
parameter and various configuration files. Among them, all the information required for the
static routing function of the indoor SPI-2210 is saved in its own storage as the startup
configure file format, and provides the information required at the time of the initialization.
Loading Procedure
To perform the loading procedure when initializing the indoor SPI-2210, the loader
performs the followings first. (Pre-loading)
 Boot-up: The booter of the Flash ROM loads the kernel and the Root File System
(RFS) from the flash ROM to the RAM Disk, and performs the kernel.
The DPSA, which uses the Intel CPU, loads the kernel and the RFS from the Disk On
Chip (DOC) to the RAM Disk via ROM BIOS booting and performs the kernel.
 IP configuration: The IP address information is obtained and configured from the flash
ROM to allow it to communicate with the first upper management system.
For automatic initialization, the indoor SPI-2210 automatically obtains the L3
information needed for communication, such as the IP address, subnet mask, and
gateway IP address from DHCP. At this time, it also receives the IP address of the
additional information server, and asks for its ID and the IP address of the RS to which
its ID is registered.
 Registration: The NE is registered to the RS, and the IP address of the IS is acquired
during the registration.
 Version Comparison: The version of the software image and the version of the PLD
saved in the remote IS and in the internal storage are compared, and the location where
to perform loading is determined from that
 File List Download: The list of the files to be loaded is downloaded for each board.