Bài giảng Thông tin di động: Phần 4 – ThS. Hà Duy Hưng

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

SM

SM

16Kbps

BS C

64Kbps

4 x 16Kbps
T
C

MS C

A­te r

A­te r Mux

A

3


•   The Base Transceiver Station:
+  Provides radio transmission, control and baseband functions for a cell
+  Supports the Air interface with the Mobiles
• BTS Situation

Sectorised Configuration

BTS

BTS

Multipoint Configuration

(Multidrop)
BTS

BTS

Um

Satellite
Abis

Chain Configuration
BTS

BTS

BTS

BSC

BTS

Abis
Abis
BTS
Antennas
BTS Terminal
BTS

Abis

Star Configuration
BTS

External alarms I/O
Clock I/O
Abis

4

Cell split (2 BTS)


•  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
6

Fan stage
Air inlet
Stand

1U
1U
50 mm


•  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

Frequency band

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

* if integrated
battery: 4
* if integrated
battery: 2
* if GSM 1900: 3

7

850/900/1800/1900
850/900/1800/1900
850/900/1800/1900

850/900/1800/1900
850/900/1800/1900
850/900/1800/1900


• Interconnection with other manufacturers
MFS: Multi­BSS Fast Packet Server
Alcatel BSSs
BTS

BS C

BTS
BTS

BS C

Othe r MFS  (MS Cs )

BTS
BTS

BS C

T
C

MSC

MFS

S GS N

T
C

Other manufacturers

Public
Switched
Network

A

IP GPRS

Backbone

GGS N

Internet
or PDN

MSC

Public
Switched
Network

A

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 packet­switched networks
9


• MFS within BSS
BTS
CCU
A

CCU

MFS
BS C

BTS

TC
Gb

PCU

CCU

CCU

A-ter

Gb

GS L

Abis

S GS N

PCU

BS C
A-ter

Um

MS C

Gb

A-ter

TC

CCU=Channel Codec Unit
PCU= Packet Control Unit
= GPRS Signalling Link (GSL)

10

A

MS C


• Position in the Network/Interface routing

BTS

BSC

TC

MSC

Frame
Relay

Alcatel
9135
MFS

SGSN
: CS Traffic
: GPRS Traffic
11

• Follow of signaling
: Telecom
: O&M

(A-bis)

BTS

BSC

RSL

TC

MSC

OML
GSL

X25
(Gb)

OMC-R
A1353RA

IP

Alcatel
9135

MFS

Frame
Relay

SGSN

IMT

12


• Operation Maintenance and Interfaces
OMC-R
MSC

Ethernet Link
A-ter Mux interface

rface
e
t
n
i
Mux
A-ter

CS traffic
BTS

B
S
C

T
C

MS C

CS traffic

PS  traffic

Gb

MFS
Ethernet Link

CS: Circuit Switching
PS: Packet Switching

inte
rfac
e

S
G
S
N

PS  traffic

IMT = Installation & Maintenance Terminal

13

GGS N


•  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

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•  Các subrack (4 lọai)
+  STASR

+   SRACDC

+  ACSR

+   ASIB

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•  Các cabinet và subrack

21


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•  Các thiết bị và Modules (cards)

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