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

Technical Manual
Airbridge BTS3612A CDMA Base Station
BCKM: BTS control & clock module, providing clock for BTS system and realizing
the control of BTS system resource.
BCIM: BTS control interface module, used for accessing transmission system to
connect to the BSC. It supports E1/T1 transmission.
BCPM: BTS channel process module, processing the data of CDMA forward
channel and reverse channel.
BRDM: BTS resource distribution module, connecting BCPM to BTRM to realize
the work mode of BCPM resource pool.
In addition to the boards introduced, this section also covers the backplane of
baseband subrack, E1 lightning-protection board and fan module.

2.2 BCKM

2.2.1 Overview

BCKM controls and manages the entire BTS system. Its functions are listed as follows:
Main control functions: Call procedure control, signaling processing, resource
management, channel management, cell configuration, etc.
Operation & maintenance functions (O&M): BTS operation and maintenance, such as
software download, status management, data configuration, test management,
interface tracing, fault management, log management, maintenance console interface,
active/standby BCKM switchover, etc.
Clock function: It provides high-precision oscillation clock and can be synchronized
with an external clock (such as GPS/GLONASS clock). Thus it provides the entire BTS
system with reference clock signal.
In addition, BCKM also provides external interfaces. See the following sections for
detail.

2.2.2 Structure and Principle

The structure of BCKM module is as shown in Figure 2-2.
Chapter 2 Baseband Subsystem
2-2
System Principle