User's Manual

Mobile WiMAX Outdoor RAS SPI-2210 System Description/Ed.05

Mobile WiMAX base station RAS board Assembly-Standard (MRA-S)

The MRA-S is equipped with the modem supporting IEEE 802.16 Mobile WiMAX

standard physical layer (PHY) and the modem performs the OFDMA signal processing

function by the control of the MMA-S.

The MRA-S modulates the packet data received through the MMA-S, converts the

modulated signal into the ‘Samsung Digital I/Q and OAM’ format and transmits to the

MRU-2. In the contrary, the MRA-S demodulated the data received from the MRU-2 after

performing the AGC function, converts the data into the format defined in the IEEE 802.16

Mobile WiMAX physical layer standard and then transmits the converted data to the

MMA-S via Ethernet.

The MRA-S supports 1carrier/1sector 2Tx/2Rx MIMO in default and can support 4-branch

Rx diversity.

The MRA-S can support N:1 Redundancy only for 1st carrier to continuously support

service to the corresponding sector if a fault occurs in a certain sector when the outdoor

SPI-2210 serves the service by using a carrier initially.

Mobile WiMAX base station External Interface board assembly (MEI)

MEI collects the environmental alarm and rectifier alarm via UCM in the outdoor SPI-2210,

and provides the path for the alarm information generated in external devices via UDA and

UDE. And MEI reports the alarm information to the MMA-S.

MEI provides the TDD signal for external devices.