The document summarizes the architecture of an Evolium A9100 indoor BTS. It describes three levels: the antenna coupling level which connects antennas to transceiver modules, the transceiver level which receives and transmits signals using radio frequency channels, and the base station control function level managed by a station unit module that synchronizes components. The BTS can provide wireless service to 96 users simultaneously using 12 transceiver modules connected to 8 time slots each.

1. By-
Shubham
Singhal

2.  EVOLIUM A9100
 INDOOR-BTS
 (MBI5)

3. GSM System Architecture

6. BTS MBI
5
&
BTS MBI3

7. A9100 Base Station Architecture (BTS)

8. General Architecture of BTS
BTS has three levels-:
-Antenna Coupling Level (ANC)
-Transceiver Level (TRX)
-Base Station Control Function (BCF)
level

9. 1. Antenna Coupling Level (ANC)
 Stage b/w antenna & TRX Levels
 A single module called ANC perform
these functions for up to 4 TRXs.
 For higher capacity, a combiner stage
can be added.

10. ANC ARCHITECTURE

11. 2. TRX(Transceiver Level)
 Transceiver Equipment…
 Used for reception & transmission of signals.
 One ARFCN is allotted to one TRX.& each
ARFCN is divided in 8 time slots, hence one
TRX can provide connection to 8 subscribers at
a time…
 One BTS= 12 TRX=12 ARFCN=12x8= 96
users….
 At a time only 96 users can make calls….

12. Base Station Control Function (BCF)
 This station is ensured by Station
Unit Module (SUMA): central unit of
BTS.
 Only one SUMA for one BTS….
 Generating clocks for all other BTS
modules.(synchronization purpose)
e.g. Abis link…..

14. MBI5 Module Positions

15. ANC Front Panel

16. SUMA
STATION
UNIT
MODULE

17. BTS Functions

