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 OMC-R
+ 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
64Kbps
4 x 16Kbps
SM
SM
16Kbps
T
C
BSC
A-ter
MSC
A-ter 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
Abis
Chain Configuration
BTS
BTS
BTS
BSC
BTS
Abis
Abis
BTS
Antennas
BTS Terminal
Abis
Star Configuration
BTS
External alarms I/O
Clock I/O
BTS
Abis
Cell split (2 BTS)
4
• Alcatel 9100 BTS functional organisation:
SUM
Abis
CLOCK
T
R
A
N
S
TRE
OMU
AN
Abis
BTS - BSC Interface
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
• Indoor BTS MBI3/MBI5
Top fan
19" (# 48 cm) internal
Top fan
Connection area
MBI 3
(3 subracks)
8 TRXs capacity
Connection area
120 mm
Subrack
6U
Fan stage
Air inlet
1U
1U
Subrack
6U
Dummy panel
1U
Subrack
6U
Fan stage
Air inlet
1U
1U
Subrack
6U
Dummy panel
1U
Subrack
6U
1U
120 mm
Subrack
6U
Fan stage
Air inlet
1U
1U
Subrack
6U
Dummy panel
1U
Subrack
6U
Fan stage
Air inlet
Stand
50 mm
1U
1U
1U
50 mm
MBI 5
(5 subracks)
12 TRXs capacity
Fan stage
Air inlet
Stand
1U
1U
50 mm
6
• Configuration MBO/MBI
Sectors Min TRX per
sect.
Standard
Low-loss
High power
Indoor AC
Max per sect
TRX
Indoor
Outdoor
MBI3
MBI5 MBO1 MBO2
Notes
1
2
3
(note 1)
1
1
1
8*
4*
2
8
6
4
8*
4*
2
8
6
4
1
4
12
4
12
850/900/1800/1900
2
3
3
(5 for MBO2)
3
3
6
4
850/900/1800/1900
850/900/1800/1900
1
2
3
1
1
1
4
2
2
4
4
3
4
4
1800
1800
1800
1
2
1
1
4
2
8
6*
3
(note 2)
1
1
4*
6
4
2
2
* GSM 1900: 6
* GSM 1900: 3
Frequency band
* if integrated
battery: 4
* if integrated
battery: 2
* if GSM 1900: 3
850/900/1800/1900
850/900/1800/1900
850/900/1800/1900
850/900/1800/1900
850/900/1800/1900
850/900/1800/1900
7
• Interconnection with other manufacturers
MFS: Multi-BSS Fast Packet Server
Alcatel BSSs
BTS
BSC
BTS
BTS
BSC
Other MFS (MSCs)
BTS
BTS
BSC
A
T
C
MSC
MFS
SGSN
IP GPRS
Backbone
T
C
Other manufacturers
GGSN
A
MSC
Public
Switched
Network
Internet
or PDN
Public
Switched
Network
8
• New System Element for GPRS
– MFS Multi BSS Fast packet Server
• GPRS Packet Control Unit functions (GSM 03.60 standard)
• Radio Resource Management for GPRS for several BSSs
• Management of the interface with the GPRS core network
– SGSN Serving GPRS Support Node
•
•
•
•
Mobile packet routing
Security and access control
Interface to the Home Location Register (HLR)
VLR for GPRS (MS location)
– GGSN Gateway GPRS Support Node
• part of the GPRS core network
• IP router, linked to one or several data networks
• Interworking with external packet-switched networks
9
• MFS within BSS
BTS
CCU
A
CCU
MFS
BSC
BTS
TC
Gb
PCU
CCU
CCU
A-ter
Gb
GSL
Abis
SGSN
PCU
BSC
A-ter
Um
CCU=Channel Codec Unit
PCU= Packet Control Unit
= GPRS Signalling Link (GSL)
MSC
Gb
A-ter
TC
A
MSC
10
• Position in the Network/Interface routing
BTS
BSC
TC
MSC
Frame
Relay
Alcatel
9135
MFS
SGSN
: CS Traffic
: GPRS Traffic
11
• Follow of signaling
(A-bis)
BTS
BSC
RSL
TC
MSC
: Telecom
:
O&M
OML
GSL
X25
(Gb)
OMC-R
A1353RA
IP
Alcatel
9135
MFS
IMT
Frame
Relay
SGSN
12
• Operation Maintenance and Interfaces
OMC-R
MSC
Ethernet Link
A-ter Mux interface
r
i nt e
x
u
rM
A-te
face
CS traffic
BTS
B
S
C
T
C
MSC
CS traffic
Gb
PS traffic
MFS
Ethernet Link
CS: Circuit Switching
PS: Packet Switching
i n te
PS traffic
rfac
e
S
G
S
N
GGSN
IMT = Installation & Maintenance Terminal
13
• Giới thiệu về phần cứng BTS A9100 của Alcatel
+ Modularity
+ Sắp xếp các subracks trong cabinet
14
• Các lọai Cabinet: Indoor Cabinet và Outdoor Cabinet
+ Indoor Cabinet và các subrack
15
+ Outdoor Cabinet và các subrack
16
• Kích thước và trọng lượng
17
18
• Các subrack (4 lọai)
+ STASR
+ SRACDC
+ ACSR
+ ASIB
19
20
• Các cabinet và subrack
21
22
• Các thiết bị và Modules (cards)
23
24
25