User's Manual

Mobile WiMAX Indoor RAS SPI-2210 System Description/Ed.07
© SAMSUNG Electronics Co., Ltd. 3-3
3.2 Detailed Structure
3.2.1 Digital Main Block (DMB)
The DMB operates and maintains the indoor SPI-2210, is in charge of the interface
between the indoor SPI-2210 and the router and provides the communication path between
processors in the system. In addition, the DMB creates a clock, provides the clock to the
lower hardware block and performs the channel processing function for the subscriber signal.
When the indoor SPI-2210 transmits a signal to an MS, the DMB performs the OFDMA
signal processing for the traffic signal received from the ACR and then converts the signal
via the ‘Samsung Digital I/Q and OAM’ converter to transmit it to RFB. On the contrary, if
the indoor SPI-2210 receives a signal from an MS, the DMB receives the ‘Samsung Digital
I/Q and OAM’ signal from the RFB, performs the OFDMA signal processing for the signal
and transmits the signal to the ACR.
Main Functions
 Creation and distribution of the reference clock
 Fast Ethernet/Gigabit Ethernet interface with ACR
 Fault diagnosis and alarm collection and control
 Alarm report
 Channel resource management
 OFDMA signal processing
 Automatic Gain Control (AGC) for the received RF signal and Received Signal
Strength Indicator (RSSI) support
The DMB is configured as shown in the figure below:
Figure 3.2 DMB Configuration
SMIR
DMB
R
S
V
R
S
V
R
S
V
M
R
A
-
S
#
R
M
R
A
-
S
#
0
M
R
A
-
S
#
1
M
R
A
-
S
#
2
M
M
A
-
S
A
M
M
A
-
S
B
M
E
I
M
R
A
-
S
#
3
M
R
A
-
S
#
4
M
R
A
-
S
#
5
M
R
A
-
S
#
6
M
R
A
-
S
#
7
M
R
A
-
S
#
8
DMB