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10. Hệ thống BTS của Alcatel
• Các thành phần trong hệ thống BSS của Alcatel
1
• The BSC provides:
+ Resource management
+ Database management
+ Radio measurement processing
+ Channel management
+ Operation and Maintenance functions within the BSS
+ Communication with the OMCR
+ Switching between the Air Interface and fixed Network
2
• The Transcoder provides:
+ Speech compression / expansion (16Kbps <> 64Kbps)
+ Data Rate adaptation
+ O&M control of the transmission function
16Kbps 4 x 16Kbps 64Kbps
T C
BSC MSC Ater Ater Mux A
3
• The Base Transceiver Station:
+ Provides radio transmission, control and baseband functions for a cell
+ Supports the Air interface with the Mobiles
Sectorised Configuration
• BTS Situation BTS BTS
Multipoint Configuration (Multidrop)
BTS
BTS
Um Satellite
Chain Configuration Abis
BTS BTS BTS
BSC
BTS
Antennas BTS Terminal
BTS
External alarms I/O
Clock I/O
Abis
Abis
Abis Abis BTS Star Configuration
BTS
4
Cell split (2 BTS)
• Alcatel 9100 BTS functional organisation:
SUM CLOCK
Abis BTS - BSC Interface
Abis T
R TRE AN
A N S
OMU
SUM Station Unit Module
TRANS Transmission
Clock Clocks
OMU Operation and Maintenance Unit
TRE Transceiver equipment
AN Antenna Network
BTS-TE BTS TERMINAL ALSO CALLED LMT (LOCAL MAINTENANCE TERMINAL)
BTS-TE
5
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