User's Manual

Mobile WiMAX Outdoor RAS SPI-2210 System Description/Ed.05
© SAMSUNG Electronics Co., Ltd. 2-5
 Matrix B (SM, vertical encoding)
Matrix B or SM method raises the effectiveness of the frequency by raising the
transmission ratio in proportion to the number of antenna in comparison with SISO.
This technology is effective when the reception SNR is high.
 Uplink
 Collaborative SM (CSM)
CSM is the technology that doubles the frequency efficiency in view of the outdoor
SPI-2210 as two MSs with each individual antenna send data simultaneously by
using the same channel.
Beamforming
The outdoor SPI-2210 can carry out the following beamforming function later according to
Mobile WiMAX Wave 2 Profile: For the beamforming, the outdoor SPI-2210 is designed
on the basis of 4Tx and 4Rx.
 Downlink
DL dedicated pilots for Partial Usage of Subchannels (PUSC) and B-AMC (2  3)
 Uplink
 UL sounding channel (type A) with decimation and cyclic shift
 UL PUSC and B-AMC (2  3)
The beamforming operation method following the Wave 2 Profile is as follows:
1) If an MS in a specific area transmits the sounding signal to the outdoor SPI-2210, the
outdoor SPI-2210 analyzes this signal.
2) The outdoor SPI-2210 estimates an appropriate beamforming coefficient on the basis
of the result analyzed in step 1).
3) The outdoor SPI-2210 carries out the beamforming for the uplink and the downlink.
Since the uplink and downlink channels have the high correlation in TDD method, the
beamforming can be supported.
2.2.2 Call Processing Function
Cell Initialization Function
The outdoor SPI-2210 announces the MAC Management message such as DCD/UCD/
MOB_NBR-ADV to the cell area in service periodically to enable the MS receiving the
message to carry out the appropriate call processing function.
Call Control and Wireless Resource Allocation Function
The outdoor SPI-2210 enables an MS to enter to or exit from the network. When an MS
enters to or exit from the network, the outdoor SPI-2210 transmits/receives the signaling
message required for call processing via R1 interface with the MS or R6 interface with
ACR.