Samsung Mobile WiMAX Outdoor RAS SPI-2331, System Description

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CHAPTER 3. Outdoor SPI-2331 Architecture
3-2 © SAMSUNG Electronics Co., Ltd.
3.2 Detailed Structure
The main functions and capacity of outdoor SPI-2331 are as follows:
Main Functions
y
Fast Ethernet interface with ACR
y
Creation and distribution of the network synchronization clock
y
Wireless signal sending/receiving function
y
Modulation/demodulation signal processing for packet traffic signal
y
Packet scheduling function(Efficient use of wireless resources and QoS guarantee)
y
Wireless bandwidth allocation function
y
ARQ function
y
Ranging function
y
System information transfer
y
Control of packet call connection setup/maintenance/release
y
Handover function
y
System operation and maintenance function
Capacity
y
Provides max. 2 Fast Ethernet connections per system
y
100 mW output power per transmission path
y
MIMO support
The outdoor SPI-2331 is configured as shown in the figure below:
Board
Name
Quantity
(Sheet)
Function
ULDB 1 U-RAS Light series-3 Digital Board
- System main processor
- A channel card processing user data traffic. MIMO(2Tx/2Rx) support.
- OFDMA channel processing
- 10/100BASE-TX 2 ports or 100BASE-FX 2 ports provided
- Reception of the GPS signal and creation and supply of the clock
- Debug interface(RS-232C) provided
- LED(power/status, GPS, backhaul) interface provided
ULRB 1 U-RAS Light series-3 RF Board
- Transceiver function
y
Tx path: converts the baseband signal into RF signal
y
Rx path: converts the RF signal into baseband signal