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User Manual
Airbridge cBTS3612 CDMA Base Station
Software phase-locking sub-module: it combines the methods of hardware
l
counting
synchronization clock signal for the system.
Hardware phase-locking control sub-module: this sub-moduloe performs
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initialization settings for the devices of hardware phase-locked loop (PLL).
2) Operation & maintenance
Public part: process messages related to OMU inter face, such as public query,
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board self-check and related functions.
Private part: impletement clock module operation parameter configuration,
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status management, alarm collection, alarm processing and reporting.
3.2.4 BCIM Software
I. Function
The primary function of BCIM software is to set up ATM transmission link on Abis
interface between BTS and BSC, and perform transmission of signaling, traffic and
O&M information between the two through related protocol stack. Specifically, it
Receives OMU configuration command and configures ATM transmission link
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on Abis interface.
In a frame of 128 cells, supports the maximum 8%1904kbit/s bandwidth of one
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ATM transmission link.
Supports up to 7 ATM transmission links between BTS and BSC, with the
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bandwidth of each link being 1904kbit/s.
II. Structure
The structure of BCIM software is shown in Figure 3-5.
IMA processing
Figure 3-5 Structure of BCIM software
III. Introduction to software units
1) IMA processing
IMA (Inverse Multiplexing on ATM) processing includes: add or delete IMA link sets
and IMA links dynamically, add or delete UNI links.
and
software
phase-locking
BCIM software
3-7
to
provide
Operation &
maintenance
System Description
3 Software Architecture
GPS/GLONASS
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