Indices; Brdm; Overview; Structure And Principle - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station

2.4.4 Indices

Power voltage: +24V.
Power consumption <30W.
Dimensions: 460mm%233.35mm (Length%Width)

2.5 BRDM

2.5.1 Overview

The BRDM is logically located between BTRM and BCPM, providing path for
orthogonal data connection (IQ) and exchange between the two so as to support the
flexible configuration relation between BCPM and BTRM. The BRDM also support
daisy chain cascading between BCPMs.
Data from the BTRM is sent to the BRDM through optical fibers. Then the BRDM
distributes the data before sending them to BCPMs via the high-speed data bus. With
the function of building cascades of daisy chain for BCPMs, the BRDM connects the
short daisy chain cascades to form standard daisy chain cascades of a certain length.
This facilitates the utilization of channel resource and flexible configuration of the
channel capacity of each sector carrier.
The BRDM has the following functions and features:
Optical interfaces are configured to provide high-speed data paths to BTRM/
ODU3601C.
Six pairs of high-speed data bus interfaces are provided to six BCPM slots through
the backplane.
Flexible data distribution and exchange between BTRM/ODU3601C and BCPM
are enabled.
Flexible data exchange between BCPMs is enabled. It can be cascaded to form
daisy chains, so BCPM resource pool can be achieved. The resource pool
improves the utilization ratio of channel resource and makes the configuration of
channel capacity of each sector carrier flexible.
It exchanges O&M information with the BCKM through the backplane bus or
emergency serial port.
It forwards and receives O&M information of BTRM/ODU3601C via optical fibers and
provides O&M links between the baseband subrack and BTRM/ODU3601C.

2.5.2 Structure and Principle

The BRDM has two specifications as follows:
Chapter 2 Baseband Subsystem
2-10
System Principle