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User Manual
Airbridge cBTS3612 CDMA Base Station
channel resource and facilitates the flexible configuration of the channel capacity of
each sector carrier.
BRDM has the following functions and features:
Six pairs of optical interfaces provide high-speed data paths to BTRM.
l
When it is necessary to extend optical interfaces, BRDM board can be inserted
l
in BCPM slot.
16 pairs of high-speed data bus interfaces are prvoded for connection with 16
l
BCPM slots through the backplane.
Flexible data distribution and exchange between BTRM and BCPM are
l
enabled.
Flexible data exchange between BCPMs is enabled. It can be cascaded to form
l
daisy chains, so BCPM resource pool can be achieved. 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 BCKM through the backplane bus or
l
emergency serial port.
It forwards and receives O&M information of BTRM via optical fiber and
l
provides O&M link between the baseband subrack and BTRM.
II. Structure and principle
The structure of BRDM module is as shown in Figure 2-7.
BTRM
BTRM
BTRM
BTRM
BTRM
BTRM
Figure 2-7 Structure of BRDM module
BRDM
Optical
Optical
module
High-speed
Optical
Optical
data
module
interface
Optical
Optical
module
Optical
Optical
module
High-speed
Optical
Optical
data
module
interface
Optical
Optical
module
Clock
Power supply
module
module
Switching
module
CPU
module
2-15
System Description
2 Hardware Architecture
4 high-speed
High-speed
data buses
BCPM
data
interface
4 high-speed
High-speed
data buses
BCPM
data
interface
4 high-speed
High-speed
data buses
data
BCPM
interface
4 high-speed
High-speed
data buses
BCPM
data
interface
Backplane
Bus
bus
interface
module
RS232
BCKM
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