User's Manual

Mobile WiMAX RAS SPI-2213 System Description/Ed.00

Loopback Test

The SPI-2213 provides the loopback test function to check whether communication is

normal on the ‘Digital I/Q and C & M’ interface line between the DU and RRH.

Remote Firmware Downloading

The operator can upgrade the RRH and its service by replacing its firmware.

Without visiting the field station, the operator can download firmware to the RRH remotely

using a simple command from the WSM.

In this way, operators can minimize the number of visits to the field station, reducing

maintenance costs and allowing the system to be operated with greater ease.

Monitoring Port

Operators can monitor the information for an RRH using its debug port.

2.2.3 Support of MIMO

The SPI-2213 basically supports MIMO of 2Tx/2Rx RF path. There are methods of MIMO

as follows;

y Downlink

− Space Time Coding (STC): method for raising reliability of link

− Spatial Multiplexing (SM): method for raising data transmission rate

y Uplink

Collaborative SM (CSM): method for doubling the frequency efficiency

2.2.4 Support of Frequency Reuse Pattern (FRP)

The SPI-2213 supports FRP N=1 that provides the service to 3-sector by using a carrier and

FRP N=3 that provides the service to 3-sector by using different carriers.

A service provider can efficiently operate its own frequency resources by using the FRP

function.

Providing or not the System Feature and Schedule to Provide the System

Feature

For the providing or not the system feature and schedule to provide the features

described in this system description, see separate document.