User's Manual

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

3.4.2 MRA-S Redundancy Structure

The MRA-S performs the call processing function in the outdoor SPI-2210 and has N:1

redundancy structure only for 1

carrier. Redundancy structure of MRA-S is provided to

service providers optionally.

Figure 3.32 MRA-S Redundancy Structure

Switchover of MRA-S

Active MRA-S doesn’t backup the data to redundancy MRA-S on principle that

existing service is not kept on in the switchover of MRA-S.

3.4.3 Backhaul Redundancy Structure

The backhaul interface of outdoor SPI-2210 supports static link aggregation (IEEE

802.3ad) based load sharing. The link aggregation (802.3ad) redundancy method ties

several ports as an interface group to deal with some or entire traffic in the remain group

pertaining to the group even if a fault occurs in some ports.

Figure 3.33 Load Sharing Structure of Backhaul

MRA-S(R)

MRA-S(1)

MRA-S(2)

MRA-S(3)

MMA-S

…

IP #1

IP #n

MAC #1

MAC #2 MAC #n

…