User's Manual

Mobile WiMAX Indoor RAS SPI-2210 System Description/Ed.07
© SAMSUNG Electronics Co., Ltd. 3-39
3.4 Redundancy Structure
The indoor SPI-2210 has the redundancy structure for main processors, devices and links to
provide persistent and stable service by enhancing the reliability and availability.
In the figure below, ‘
(Red)’ mark indicates the board in service and ‘ (White)’ mark
indicates the board in standby mode.
3.4.1 MMA-S Redundancy Structure
The MMA-S, which is the main processor of the indoor SPI-2210, supports the redundancy
structure for the system reliability. The MMA-S functionally consists of the OAM block
and the UCCM for GPS reception and clock distribution and each block has the
redundancy structures as follows:
Redundancy Structure of OAM Block
The OAM block of MMA-S is duplicated in active/standby method. The two dual boards
sends/receives data required for the duplication in Low Voltage Differential Signaling
(LVDS) method.
Figure 3.27 Redundancy Structure of OAM Block (MMA-S)
Redundancy Structure of UCCM
The UCCM of MMA-S is duplicated in active/standby method. The two dual boards
sends/receives data required for the duplication in LVDS method
Figure 3.28 Redundancy Structure of UCCM (MMA-S)
Redundancy Path
A
ctive link
Standby link
MMA-S (B)
OAM
Standby
MMA-S (A)
OAM
A
ctive
LVDS
Indoo
r
SPI-2210
하드웨어
블록
Hardware
Block
LVDS
MMA-S (A)
UCCM
MMA-S (B)
UCCM