User's Manual

Table Of Contents
2–5
PacketMax 5000 Installation and Operation Manual, 10007678 Rev J
Chapter 2. Base Station Components
Figure 2-3 Slots and port numbers of four sectors BS
2.3 Wireless System Controllers
The WSC implements the 802.16-2004 MAC and PHY level functions.
The MAC functions include:
A configurable Time Division Duplexing frame for efficient and flexible spectrum
utilization.
A standard OFDM256 TDD frame structure.
Frame parameters that are configurable in the system.
Automatic Retransmission request (ARQ), which is a fast retransmission proto-
col at layer 2 that allows the MAC to recover burst errors and thus to improve
user throughput and overall system capacity.
Parameters such as modulation, FEC encoding, burst size, retransmission pol-
icy and transmit power.
Quality of Service (QOS).
Radio Control.
The PHY level features include:
Software selectable channel bandwidths, depending on the frequency band
Modulation and encoding, which are optimized and selected on a burst by burst
basis.
Transmission and Reception of Intermediate Frequency (IF) signals to support
BSR.