User's Manual

Table Of Contents
Base Station Equipment
BreezeMAX Modular Base Station System Manual 7
Each AU-IDU includes four channels using a common PHY and MAC
that can connect to up to four outdoor radio units, according to the
selected diversity mode (refer to Section 1.2.5 below for more details).
The AU-IDU module connects to the AU-ODUs via Intermediate
Frequency (IF) cables carrying full duplex data, control and
management signals between the AU-IDU and the AU-ODU, as well as
power (-48 VDC) and 64 MHz synchronization reference clock from the
AU-IDU to the AU-ODU. The IF Tx and Rx frequencies are 240 MHz
and 140 MHz, respectively. IDU-ODU service channel at 14 MHz
serves for bi-directional control, status and management signaling.
1.2.4 AU-ODU-HP
The AU-ODU-HP (High Power ODU) is a full duplex multi-carrier radio unit that
connects to an external antenna. It is designed to provide high system gain and
interference robustness utilizing high transmit power and low noise figure. It
supports a bandwidth of up to 14 MHz, enabling future options such as increased
capacity through either larger channels or using an IF multiplexer.
The AU-ODU-HP provides a maximum output power of 36 dBm.
1.2.5 Base Station Radio Configurations
The 4-Channels High-Power AU-IDUs support the following radio configurations:
1.2.5.1 Single Channel per AU, No Diversity
This is the basic configuration, where each AU-IDU connects to one ODU, serving
a single sector with a directional antenna.
1.2.5.2 Multiple Channels per AU, No Diversity
Up to 4 channels per AU-IDU can be used to cover several sectors, where each
channel connects to one ODU, with one ODU per sector. A single AU-IDU can
cover a 360° cell. Where the coverage of the cell can be built from 3 sectors of 120°
each with frequency reuse 1, or 4 sectors of 90° each with frequency reuse 1 (i.e.
frequency per sector) or 1/2 (i.e. 2 frequencies for 4 sectors where each frequency
is used for 2 opposite sectors). All ODUs served by the same AU-IDU share a
common MAC and modem. Each ODU is managed separately.