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www.huawei.com
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
HUAWEI BTS3012 Hardware Structure
Page2Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Objectives
Upon completion of this course, you will be able to:
Know the functions and features of BTS
Master the BTS hardware structure
Master the cable connection of BTS
Page3Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
References
BTS3012 Technical Manual
BTS3012 Installation Manual
BTS3012 User Manual
Page4Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
Page5Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Location
MS: Mobile Station BTS: Base Transceiver Station
BSC: Base Station Controller
HLR: Home Location Register
AUC: Authentication Center
EIR: Equipment Identity Register
MSC: Mobile Switching Center
VLR: Visitor Location Register
SMC: Short Message Center
VM: Voice Mailbox OMC: Operation and Maintenance Center
PSTN ISDN
PSPDN
Um Interface
BTS3012
BTS3012
BTS3012
BTS3012
OMC
HLR/AUC/EIR
BSC
MSC/VLR
SMC/VM
A Interface
MAPMAP
TUP,ISUPMS
MS
MS
Page6Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Features and Functions
Support GSM800M 、 850M 、 900M 、 1800M 、 1900M Support networking topology includes star, tree, chain a
nd ring Support A5/1 and A5/2 encryption/decryption Support GPRS and EDGE Support dynamic and static power control Support the omni-directional coverage and directional co
verage
Page7Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Features and Functions Double Transceiver Unit (DTRU). A single cabinet can
support up to 12 carriers. It can smoothly evolve into
WCDMA
Transmit diversity, 4-receive diversity
Support Power Boost Technology (PBT)
BTS3012 can share cabinet with WCDMA base station. The
module of WCDMA base station can be inserted in the
BTS3012 cabinet
Support more various transmission mode includes E1, STM-
1, microwave, and satellite transmission
Page8Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
Page9Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Hardware structure
TMA TMA
DTRU DAFU
Antenna and feeder subsystem
Forepart of RFSubsystem
TMA TMA
DTRU DAFU
TMA TMA
DTRU DAFU
Double transceiver subsystem
DATU
Um Interface
DATU
fiber
E1
Abis Interface
Common subsystem
NFCB
Metro 100
DTMU
DEMU
E1
BITSMonitor
TBUS/DBUS/CBUS
MS
FH_BUS
Extension cabinet
DBUS/
TBUS
CBUS
CBUS3
CBUS3
CBUS3
CBUS3
CBUS2
CBUS2
CBUS2
CBUS3
CBUS3
Pro
tect
ion f
or
signal
Electric tilt antenna & TMA feed
Electric tilt antenna & TMA feed
Electric tilt antenna &TMA feedCBUS3
FH_BUS
FH_BUS
RF signal
RF signal
RF signal
Page10Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
BTS3012 Cabinet and BoardsAbbreviations Description
DTRU Double Transceiver Unit
DTMU Transmission & Timing & Management Unit for DTRU BTS
DCCU Cable Connection Unit for DTRU BTS
DAFU Antenna Front-end Unit for DTRU BTS
DDPU Dual Duplexer Unit for DTRU BTS
DCOM Combining Unit for DTRU BTS
DATU Antenna and TMA Control Unit for DTRU BTS
DMLC Monitor Signal Lightning-Protection Card for DTRU BTS
DELC E1 Signal Lightning-Protection Card for DTRU BTS
DSAC Signal Access Card for DTRU BTS
DCSU Combined cabinet Signal connection Unit for DTRU BTS
DEMU Environment Monitoring Unit for DTRU BTS
DCTB Cabinet Top Backplane for DTRU BTS
FAN Box NodeB Fan Controlling and monitoring Board
Page11Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
BTS3012 Cabinet and Boards D D D D
Wiring & Air Inlet
Wiring
DDPU
DCOM
DCOM
DDPU
DCOM
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
Wiring
FAN
Air Inlet
MLC
Power and EMC
Transmission Unit
DDPU
ELC
ELC
SAC
Transmission Unit
DTMU
DTMU
DEMU
DC
CU
DC
SU
DAT
U
Double transceiver subsystem
Common Subsystem
Antenna Front-End of the RF Subsystem (DAFU)
Cabinet Top Access Subsystem (DCTB)
Page12Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
BTS3012 Cabinet and Boards
D D D D
Wiring & Air Inlet
Wiring
DDPU
DCOM
DCOM
DDPU
DCOM
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
Wiring
FAN
Air Inlet
MLC
Power and EMC
Transmission Unit
DDPU
ELC
ELC
SAC
Transmission Unit
DTMU
DTMU
DEMU
DC
CU
DC
SU
DAT
U
Double transceiver subsystem
Common Subsystem
Antenna Front-End of the RF Subsystem (DAFU)
Cabinet Top Access Subsystem (DCTB)
Page13Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Common Subsystem
DTMU Transmission timing& management unit for
DTRU BTS
DEMU Environment Monitoring Unit for DTRU BTS
DCSU Combined cabinet Signal connection Unit for
DTRU BTS
DCCU Cable Connection Unit for DTRU BTS
DATU Antenna and TMA control unit for DTRU BTS
Page14Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of DTMU Providing the external GPS input, the BITS synchronized clock
input Providing 4-route or 8-route E1 input , backup between the a
ctive and standby boards Providing local MMI maintenance of the 10 M network port Controlling, maintaining, and operating the BTS Providing fault management, configuration management, perf
ormance management, and security management Supporting 8-route digital alarm input. Two routes are lightnin
g arrester failure alarm detection
Page15Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Structure of DTMU
MCK
OML
DBUS
CBUS2
Clock
BIUDTRU
DTMU
BSC
MCUMMI
LMT
Abis
External
synchronizedclockSubrack number
and clock
Page16Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Indicators on DTMU
RUN
ACT
PLL
LIU1
LIU2
LIU3
LIU4
SWT
ALM
RST
MMI
T2M
FCLK
T13M
DTMU
Indicator
Color
Description
Status Meaning
RUN Green
Indicates operation
Slow flash (0.25 Hz)
OML is blocked
Slow flash (0.5 Hz)
Normal
Fast flash at uncertain intervals
BSC data loading
Off Power failure of the boardACT Gree
nIndicates whether the board is active or standby
Off StandbyOn Active
PLL Green
Indicates the clock status
Off AbnormalOn Free-runFast flash (4 Hz) Pull-inSlow flash (1 Hz) Lock
LIU1 Green
Indicates the transmission status of E1 port 1 and port 5
Off E1 port 1 is normal when SWT is out E1 port 5 is normal when SWT is on
On E1 port 1 near end alarm occurs when SWT is outE1 port 5 near end alarm occurs when SWT is on
Fast flash (4 Hz) E1 port 1 remote end alarm occurs when SWT is outE1 port 5 remote end alarm occurs when SWT is on
Page17Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Indicator
Color Description Status Meaning
LIU2 Green Indicates the transmission status of E1 port 2 and port 6
Off E1 port 2 is normal when SWT is outE1 port 6 is normal when SWT is on
On E1 port 2 near end alarm occurs when SWT is outE1 port 6 near end alarm occurs when SWT is on
Fast flash (4 Hz)
E1 port 2 remote end alarm occurs when SWT is outE1 port 6 remote end alarm occurs when SWT is on
LIU3 Green Indicates the transmission status of E1 port 3 and port 7
Off E1 port 3 is normal when SWT is outE1 port 7 is normal when SWT is on
On E1 port 3 near end alarm occurs when SWT is outE1 port 7 near end alarm occurs when SWT is on
Fast flash (4 Hz)
E1 port 3 remote end alarm occurs when SWT is outE1 port 7 remote end alarm occurs when SWT is on
LIU4 Green Indicates the transmission status of E1 port 4 and port 8
Off E1 port 4 is normal when SWT is outE1 port 8 is normal when SWT is on
On E1 port 4 near end alarm occurs when SWT is outE1 port 8 near end alarm occurs when SWT is on
Fast flash (4 Hz)
E1 port 4 remote end alarm occurs when SWT is outE1 port 8 remote end alarm occurs when SWT is on
SWT Green Indicates handover status of E1
Off LIU1 to LIU4 indicate the transmission status of E1 port 1 to 4
On LIU1 to LIU4 indicate the transmission status of E1 port 5 to 8
ALM Red Alarm indicators Off No hardware alarm
On Hardware alarm
Indicators on DTMU
RUN
ACT
PLL
LIU1
LIU2
LIU3
LIU4
SWT
ALM
RST
MMI
T2M
FCLK
T13M
DTMU
Page18Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Interface on the DTMU panel
Interfac
e
Type Description
T2M SMB (female) Outputs reference testing clock
FCLK SMB (female) 216.7 Hz frame clock
T13M SMB (female) 13M primary reference clock
MMI RJ45 Near end maintenance network
port
Page19Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of DEMU The DEMU is placed in slots 2 to 4 and slot 7 of the comm
on subrack with the DATU. The DEMU is an optional module. There is maximum one DEMU under full configuration.
Monitoring variations in the smoke, water, temperature, humidity, infrared, and access control ,Handling alarms
Output of 6-route Boolean value and input of 32-route main node alarms
DMLC DEMUCBUS3Monitor signal
Page20Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of DCSU The Combined Cabinet Signal Con
nection Unit for DTRU BTS (DCSU) is placed in slot 5 of the common subrack, which is located in the lower part of the cabinet. There is only one DCSU and it is mandatory
The DCSU transfers signals for the combined cabinet and cabinet group between the common subrack and the cabinet top subrack
DCMB
DTMU
DCSUDTRB
DCTB
DCCU
DEMU
DATU
Page21Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
The interfaces on the DCSU panel
Silk- Screen
Type Description
CC_OUTMD64 (female)
For cable output from the combined cabinet
CC_IN MD64 (female)
For cable input to the combined cabinet
To_DTRB MD64 (female)
Connecting to the DTRB through cables
TOP2DB26 (female)
Connecting to the cabinet top subrack through cables
CC_IN
CC_OUT
TO_DTRB
TOP2
DCSU
Page22Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
GM51DCSU VERBSW6
SW9
SW14
SW13
SW12
SW7
SW10
SW8
SW5
SW4
SW3
SW11
SW2
SW1
Switch of DCSU
Page23Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of DCCU
The DCCU is placed in slot 6 of the common subrack. There is only one DCCU and it is mandatory
Converting the input and output signals of the common subrack.
Inputting the power of the common subrack
Providing EMI filtering
DCMB
DTMU
DCCUNFCB
DCTB
DCSU
DEMU
DATU
Page24Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
The interfaces on the DCCU panel
POWER
DCCU
To_FAN
TO_TOP1
TRAN
Silk-Screen
Type Description
TRANMD64 (female)
For E1 signal input
To_FAN DB26 (female)
Connects to the fan panel through cables
TO_TOP1
MD64 (female)
Connects to the cabinet top subrack through cables
POWER 3V3 For power input of the common unit
Page25Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of DATU
The DATU is placed in slots 2 to 4 and slot 7 of the common subrack with the DEMU. It is optional and there are maximum two DATUs
Transmitting the remote electrical tilt unit (RET) control signals
Feeding the TMA Communicating with the DTMU through CBU
S3 for control and alarm report
DATU
RUN
ACT
ALM
ANT0
ANT1
ANT2
ANT3
ANT4
ANT5
Page26Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
BTS3012 Cabinet and BoardsD D D D
Wiring & Air Inlet
Wiring
DDPU
DCOM
DCOM
DDPU
DCOM
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
Wiring
FAN
Air Inlet
MLC
Power and EMC
Transmission Unit
DDPU
ELC
ELC
SAC
Transmission Unit
DTMU
DTMU
DEMU
DC
CU
DC
SU
DAT
U
Double transceiver subsystem
Common Subsystem
Antenna Front-End of the RF Subsystem (DAFU)
Cabinet Top Access Subsystem (DCTB)
Page27Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Cabinet Top Access Subsystem
DMLC( Monitor Signal Lightning-Protection Card for DTRU BTS)
DELC(E1 Signal Lightning-Protection Card for DTRU BTS) DSAC(Signal Access Card for DTRU BTS)
DML
C
DEL
C
DEL
C
DSA
C
DC
F
CK
B2
CK
B1
Page28Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Function of DMLC
The DMLC is placed in slots 0 to 2 of the cabinet top subrack with the DELC. There is only one DMLC and it is optional DMLC
Thirty-two-route Boolean value input Six-route Boolean value output Four-route analog input Smoke/water/access control/infrared/humidit
y/temperature sensor signal input
SWIN
SWOUT
DMLC
AIN
Page29Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Function of DELC
The DELC is placed in slots 0 to 2 of the cabinet top subrack with the DMLC
The DELC is mandatory and there is one DELC under minimum configuration
Without the DMLC, there are maximum three DELCs, supporting up to 12 routes of protected E1 signals
DELC
TR
Page30Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Function of DSAC
The DSAC is placed in slot 3 of the cabinet top subrack. There is only one DSAC and it is mandatory
Six-route Boolean value input. Two-route CBUS3 output Two-route input of lightning protection arrest
er failure alarm Access protection of BITS clock input
DSAC
CO
M1
EA
CS
YN
CC
OM
2S
1+
S1
-S2
+S
2-
Page31Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
BTS3012 Cabinet and BoardsD D D D
Wiring & Air Inlet
Wiring
DDPU
DCOM
DCOM
DDPU
DCOM
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
Wiring
FAN
Air Inlet
MLC
Power and EMC
Transmission Unit
DDPU
ELC
ELC
SAC
Transmission Unit
DTMU
DTMU
DEMU
DC
CU
DC
SU
DAT
U
Double transceiver subsystem
Common Subsystem
Antenna Front-End of the RF Subsystem (DAFU)
Cabinet Top Access Subsystem (DCTB)
Page32Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Double transceiver subsystem
DTRU ( Double Transceiver Unit ) DTRB
DTRB
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
Page33Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of DTRU RF subsystem transmit part. Converts the basband signals on the two TR
Xs to the RF signals. Supports up-frequency conversion of the signals and RF frequency hopping.Filters, amplifies, and outputs the combined signals
RF subsystem receive part.Devides and modulates the RF signals on the two TRXs.Supports transmit receive and RF frequency hopping
Baseband processing part.Processes signals.Supports coding and decoding, interleaving and de-interleaving, modulation and demodulation.Supports voice fax services.Supports data services in Phase II, GPRS services, and EDGE services.Supports transmit diversity and 4-way receive diversity.Amplifies the output power
Page34Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functional structure of DTRU
DTRU Baseband and RF Unit (DBRU)
DTRU Power Amplifier Unit (DPAU)
DTRU Power Supply Unit (DTPS)
DTMU
DTPS
DTRU
- 48V DC
DPAU
DBRUDAFU
Page35Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Indicators on DTRU
RL alarmSlow flash (0.5 Hz)
NormalOff
Standing wave alarmOnRF interface indicatorsRedRF_IND
The board is normal.Off
Critical alarm occurs to the board.On (including high-frequency flash)
Indicates alarmRedALM
Only parts of the logic channels are working normally (including after TRX mutual aid).
Slow flash (0.5Hz)
Communication between DTRU and DTMU is not set upOff
The board is running (the DTMU sends configuration parameters to the DTRU correctly and the cell is starting). All the channels on the two carriers can work normally.
OnIndicates the TRX is working
GreenACT
The DTMU is sending configuraiton parameters to the DTRU.
Fast flash (2.5 Hz)
The board is running.Slow flash (0.5 Hz)
The board is starting.Slow flash (0.25 Hz)
There is no power supply and the board is faulty.Off
There is power supply or the board is faulty.OnIndicates the running and power-on of the DTRU
GreenRUN
MeaningStatusDescriptionColorIndicator
RL alarmSlow flash (0.5 Hz)
NormalOff
Standing wave alarmOnRF interface indicatorsRedRF_IND
The board is normal.Off
Critical alarm occurs to the board.On (including high-frequency flash)
Indicates alarmRedALM
Only parts of the logic channels are working normally (including after TRX mutual aid).
Slow flash (0.5Hz)
Communication between DTRU and DTMU is not set upOff
The board is running (the DTMU sends configuration parameters to the DTRU correctly and the cell is starting). All the channels on the two carriers can work normally.
OnIndicates the TRX is working
GreenACT
The DTMU is sending configuraiton parameters to the DTRU.
Fast flash (2.5 Hz)
The board is running.Slow flash (0.5 Hz)
The board is starting.Slow flash (0.25 Hz)
There is no power supply and the board is faulty.Off
There is power supply or the board is faulty.OnIndicates the running and power-on of the DTRU
GreenRUN
MeaningStatusDescriptionColorIndicator DTRU
TX1
IN1
TCOM
IN2
TX2
RST
RUN
ACT
ALM
RF_IND
PWR
RXM1
RXD1
RXM2
RXD2
Page36Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Connectors on DTRU
Power supply3V3PWR
Diversity receive port of carrier 2 or Diversity 4 receive port of
carrier 1
SMA (female)RXD2
Main receive port of carrier 2 or Diversity 3 receive port of carrier 1SMA (female)RXM2
Diversity 1 or 2 receive port of carrier 1SMA (female)RXD1
Main or diversity 1 receive port of carrier 1SMA (female)RXM1
TX2 output signals:
Output to the forepart of the RF when not in combiner
Output to IN2 in combiner
N (male)TX2
Connects to TX2 in combinerSMA (female)IN2
Combines and outputs IN1 and IN2 or implements PBT combined
output
N (male)TCOM
Connects to TX1 in combinerSMA (female)IN1
TX1 output signals:
Output to the forepart of the RF when not in combiner
Output to IN1 in combiner
N (male)TX1
DescriptionTypeInterface
Power supply3V3PWR
Diversity receive port of carrier 2 or Diversity 4 receive port of
carrier 1
SMA (female)RXD2
Main receive port of carrier 2 or Diversity 3 receive port of carrier 1SMA (female)RXM2
Diversity 1 or 2 receive port of carrier 1SMA (female)RXD1
Main or diversity 1 receive port of carrier 1SMA (female)RXM1
TX2 output signals:
Output to the forepart of the RF when not in combiner
Output to IN2 in combiner
N (male)TX2
Connects to TX2 in combinerSMA (female)IN2
Combines and outputs IN1 and IN2 or implements PBT combined
output
N (male)TCOM
Connects to TX1 in combinerSMA (female)IN1
TX1 output signals:
Output to the forepart of the RF when not in combiner
Output to IN1 in combiner
N (male)TX1
DescriptionTypeInterface DTRU
TX1
IN1
TCOM
IN2
TX2
RST
RUN
ACT
ALM
RF_IND
PWR
RXM1
RXD1
RXM2
RXD2
Page37Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
DTRU transmit mode
No combining
Diversity transmitter
Power booster technology
Wide band combining
Page38Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
No combining
TCOM
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
Page39Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Diversity transmitter
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
Man made multi way
combinercombiner
Page40Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Power booster technology
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
Same phase
combinercombiner
Page41Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Wide band combining
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
combinercombiner
Page42Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
DTRU receive mode
Independent receiver
Dividing receiver
Four diversity receiver
Page43Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Independent receiver
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
dividerdivider
combinercombiner
dividerdivider
Page44Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Dividing receiver
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
dividerdivider
dividerdivider
Page45Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Four diversity receiver
TRX0TRX0
TX
TRX1TRX1
TXdividerdivider
dividerdivider
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
Page46Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Intra structure of DTRU
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
dividerdivider
dividerdivider
Page47Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of DTRB
The DTRB is placed in the DTRU subrack. It has six slots, each holding one DTRU
The DTRB provides connections between the DCSU and the DTRU. All the onsite signals are provided to the DCSU through the DTRB
DTRB
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
Page48Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
BTS3012 Cabinet and BoardsD D D D
Wiring & Air Inlet
Wiring
DDPU
DCOM
DCOM
DDPU
DCOM
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
Wiring
FAN
Air Inlet
MLC
Power and EMC
Transmission Unit
DDPU
ELC
ELC
SAC
Transmission Unit
DTMU
DTMU
DEMU
DC
CU
DC
SU
DAT
U
Double transceiver subsystem
Common Subsystem
Antenna Front-End of the RF Subsystem (DAFU)
Cabinet Top Access Subsystem (DCTB)
Page49Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Front-End of the RF Subsystem
DDPU (Dual Duplexer Unit for DTRU BTS)
DCOM (Combining Unit for DTRU BTS)
NBBI
D
C
O
M
D
D
P
U
D
C
O
M
D
D
P
U
D
C
O
M
D
D
P
U
1 2 3 4 50
Page50Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of DDPU The DDPU is intermixed with the DCOM in the DAFU subrack of the for
epart of RF subsystem. It is indispensable. Generally, the number of DDPU is one at least and three at most. Without the DCOM, there can be at most six DDPUs
Sending multi RF signals from the transceiver in the DTRU to the antenna through the duplexer
Sending signals from the antenna after amplifying and quartering them to the transceiver in the DTRU
Detecting standing wave alarms in the Antenna Feeder system Receiving the gain control of the low noise amplifier
Page51Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functional structure of the DDPU
ANTB
TXA
TXB
RXA4
duplexerduplexer dividerdivider duplexerduplexer dividerdivider
ANTA
RXA1RXA2RXA3
RXB1RXB2RXB3RXB4
Page52Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Indicators on DDPU Indicato
rColor Description Status Meaning
RUN Green Indicates the DDPU is running and powerd on
On There is power supply and the board is faulty
Off There is no power supply or the board is faulty
Slow flash (0.5 Hz)
The board is running normally
Fast flash (2.5 Hz)
The DTMU is sending configuration parameters to the DDPU or the DDPU is loading software programs
ALM Red Indicates an alarm
On (including high-frequency flash)
There is alarm including standing wave alarm) and the board is faulty
Off No fault
Slow flash (0.5 Hz)
The board is starting or loading the newest application programs
VSWRA Red Indicates a standing wave alarm of Channel A
Slow flash (0.5 Hz)
Standing wave alarm occurs to Channel A
On Standing wave critical alarm occurs to Channel A
Off No standing wave alarm occurs to Channel A
VSWRB Red Indicates a standing wave alarm of Channel B
Slow flash (0.5 Hz)
Standing wave alarm occurs to Channel B
On Standing wave critical alarm occurs to Channel B
Off No standing wave alarm occur to Channel B
RUNALM
VSWRA
RXA1
RXA2
RXA3
RXA4
RXB1
RXB2
RXB3
RXB4
DDPU
TXA
TXB
COM
POWER
VSWRB
ANTAANTB
Page53Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Interface on DDPU Interfac
eType Description
COM DB26 (female)
Sends to the DDPU control signals, communication signals, clock signals and subrack number
POWER 3V3 Power supply inputTXA N (male) Input of the TX signals sent from the DTRU
Input of the DCOM combining signalsTXB N (male) Input of the TX signals sent from the DTRU
Input of the DCOM combining signalsRXA1 SMA
(female)Main 1 output port
RXA2 SMA (female)
Main 2 output port
RXA3 SMA (female)
Main 3 output port
RXA4 SMA (female)
Main 4 output port
RXB1 SMA (female)
Diversity 1 output port
RXB2 SMA (female)
Diversity 2 output port
RXB3 SMA (female)
Diversity 3 output port
RXB4 SMA (female)
Diversity 4 output port
ANTA DIN (female)
RF jumper port
ANTB DIN (female)
RF jumper port
RUNALM
VSWRA
RXA1
RXA2
RXA3
RXA4
RXB1
RXB2
RXB3
RXB4
DDPU
TXA
TXB
COM
POWER
VSWRB
ANTAANTB
Page54Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of DCOM
The DCOM is placed in the DAFU subrack with the DDPU
The DCOM is optional and there are a maximum three DCOMs. The DTRU combines two carriers into one channel. The DCOM is required when the DTRUs are insufficent
The DCOM combines the 2-route DTRU transmission signals and outputs them to the DDPU
DCOM
TX-COM
TX2
TX1
ONSHELL
Page55Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Interfaces on DCOM
Interfac
e
Type Description
ONSHEL
L
DB26
(female)
For indentification of the board type of DCOM and on-site status
TX—
COM
N (male) Output of combining signals from the
DCOM to DDPU
TX1 N (male) TX signal input from the DTRU to DCOM
TX2 N (male) TX signal input from the DTRU to DCOM
Page56Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Functions of FAN BOX The FAN BOX forms a loop with the air inlet box to provide forced
ventilation and dissipation for the common subrack, the DTRU subrack, and the DAFU subrack
The FAN Box is mandatory with four independent axial flow fans. The fans' speed and running status are controlled by the Fan Controlling and Monitoring Board
FANSTATE
COM
PWR
Page57Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Indicators on FAN BOX
Indicator Color Status Meaning
STATE Green Fast flash (4
Hz)
Communication between the
NFCB and the DTMU is
abnormal. There is no alarm
Red Fast flash (4
Hz)
Alarm occurs to the board
Green Slow flash
(0.5 Hz)
The board is running normally
Orange (red
and green)
On The board software is being ungraded
Green or red
or orange
Off There is no power supply and
the board is faulty
Page58Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
Page59Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
System Signal Flow
the signal flow of the service and signaling include
DL Signal Flow
UL Signal Flow
Signaling Processing Signal Flow
Clock Signal Flow
Combined Cabinet Signal Flow
Page60Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
DL Signal Flow
DDPU
Um
BSC
BTS3012 Cabinet
MSAntennaFeeder
Abis
DTRU
DTMU
Page61Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
DL Signal Flow
The DL signal flow includes the following steps:
The DTMU receives the service data from the BSC,
exchanges and processes it, and then transfers it to the
DTRU
The DTRU performs digital filtering, up conversion, and filter
amplification of the signals and sends the signals to the
DDPU
The duplexer in the DDPU filters the signals sent from the
DTRU and transmits the signals through antennas and
feeders
Page62Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
UL Signal Flow
DAFU
Um
BSC
BTS3012 Cabinet
MSAntennaFeeder
Abis
DTRU
DTMU
Page63Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
UL Signal Flow The UL signal flow includes the following steps:
The antenna receives the signals transmitted from the MS. After being amplified by the TMA, the signals are transmitted to the DDPU through the feeder.The TMA is optional. It is used to compensate the feeder loss and enhance receiver sensitivity of the DDPU antenna port
The DDPU receives the signals and transmits the signals to the DTRU after they are filtered by the duplexer and amplified by the LNA
The DTRU receives the signals and transmits the signals to the DTMU after amplification and down conversion. The DTMU then transmits the signals to the BSC through the Abis interface
Page64Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Signaling Processing Signal Flow
BTS3012
DDPUDTRUDTMU
BSCAbis
Page65Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Signaling Processing Signal Flow The signaling processing signal flow includes the following steps:
The Abis interface board receives the signaling data from the BSC and transmits the data to the DTMU
The DTMU performs decision and processing on the signaling and transmits the signaling to the DTRU and DDPU
The DTRU and DDPU report board status to the DTMU The DTMU obtains the status of the BTS3012 by collecting and anal
yzing the status of all boards and transmits the information to the BSC through the Abis interface
Page66Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Clock Signal Flow
DTMUBoards in main
cabinet
Boards in slavecabinet
A-bis
Clock distributioncable between
cabinets
Page67Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Clock Signal Flow Description
The clock signal flow includes the following steps: The external reference clock is transmitted to the clock modul
e in the DTMU through the Abis interface The clock module performs phase lock and frequency division
on the clock signals to generate different clock signals for BTSs The clock signals are transmitted to the modules in the main c
abinet such as the DTRU and the DDPU The clock signals are transmitted to the modules in the slave c
abinets through the clock distribution cable
Page68Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
Page69Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Antenna Feeder subsystem
Antenna
TMA
Antennasupport
Jumper
JumperFeeder
Jumper
AntennaFeederJumpers
TMA
Page70Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Antenna In mobile communications systems, the antenna
consists of an array of element antennas, as shown
in Figure Element antenna
Feeding network
Antenna connector
Directional antenna Omnidirectional antenna
Feeding network
Element antenna
Feeding network
Antenna connector
Page71Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Antenna BTS3012 antennas are classified:
By radiation features in horizontal directions: omnidirectional antennas and directional antennas
By polarization features: single polarization antennas and dual polarization antennas
Omnidirectional antenna
Single polarization antenna
Dual polarization antenna
Page72Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Lightning Arrester is used
to prevent the equipment
from being damaged by
the lightening current
inducted by the core line
of the feeder
feeder
jumper
Lightning Arrester
Lightning Arrester
Page73Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Types of Main Feeder
7/8 inch Cable loss=0.043dB/m
5/4 inch Cable loss=0.032dB/m
1/2 inch jumper Cable loss=0.11dB/m
Used between the antenna and the main feeder
Between the antenna and the tower-top amplifier
Between the cabinet and the lightning arrester
Page74Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
TMA The tower mounted amplifier (TMA) is a low noise
amplification module installed on the tower top. The
TMA is optional. The triplex TMA is usually used and
installed close to the antenna. The triplex TMA
consists of triplex filter, low noise amplification, and
feeder
Lowernoise
amplific-ation
Sendingfilter
Receivingfilter
Bypass
DC
BTS
TMA
Feeder
Receivingfilter
Page75Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Antenna Pattern
The antenna pattern describes the radiating abilities
of antennas in all directions
360¡ ã
Omni Antenna Directional antenna
120¡ ã 90¡ ã 65¡ ã
Page76Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Polarization Two main types of polarization
Vertical polarization
Horizontal polarization
The types of antenna divided by polarization
Single polarized antenna
Vertical polarization for GSM
One port for one feeder
Dual polarized antenna
+45 degree and -45 degree
Two ports for two feeders
Page77Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
Page78Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Configuration Principles The configuration principles of the BTS3012 cabinet are as follows:
The minimum antenna ruleuse as few as possible antennas for cell configuration.
The minimum cabinet ruleuse as few as possible cabinets for cell configuration.
The complete synchronous cell ruleall TRXs of a synchronous cell are configured in the same cabinet group
The basic cabinet priority ruleTRXs are configured in the basic cabinet in preference, and the number of TRXs in the basic cabinet is not less than that in any extension cabinet
Page79Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Configuration Principles The BTS3012 supports the omnidirectional coverage and the directional cov
erage. The BTS3012 supports the combination of two cabinets to form one group a
nd the combination of three cabinet groups. The BTS3012 supports the transmit diversity and 4-way diversity receive. The DCOM combines two carriers into one channel (the two-into-one functi
on). The DCOM is required when the DTRUs are not sufficient. The BTS3012 uses DTRU. One single cabinet supports up to 12 TRXs in full c
onfiguration. The maximum number of carriers is eight in a cell with a pair of dual polariz
ation antennas or two omnidirectional antennas of a single sectorized cell
Page80Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Typical configuration S1/1/1( Diversity transmitter )
S1/1/1 Diversity transmitter / Four diversity receiver mode , each cell is configured one DTRU and two DDPU
BSC data configuration should be Diversity transmitter mode Four diversity receiver mode
Cabinet Top power ( dBm ) ( 46 or 47.8 ) -1.0
DTRU
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
TX 1
TCOM
RXM 1
RXM 2
RXD 1
RXD 2
TX 2
IN2
IN 1
Page81Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Typical configurationS2/2/2( No combining mode ) S2/2/2 transmit independence mode , each cell is
configured one DTRU and one DDPU The connection for one cell is showed in the right sl
ide BSC data configuration should be
No combining mode Dividing receiver mode
Cabinet Top power ( dBm ) ( 46 or 47.8 ) -1.0
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
DTRU
TX 1
TCOM
RXM 1
RXM 2
RXD 1
RXD 2
TX 2
IN2
IN 1
Page82Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Typical configurationS2/2/2( Power booster technology )
S2/2/2 PBT mode , each cell is configured two DTRU and one DDPU
The connection for one cell is showed in the right slide
BSC data configuration should be Power booster technology mode Independent receiver mode
Cabinet Top power ( dBm ) 49 - 1.0
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
DTRU
TX 1
TCOM
RXM 1
RXM 2
RXD 1
RXD 2
TX 2
IN2
IN 1
DTRU
TX 1
TCOM
RXM 1
RXM 2
RXD 1
RXD 2
TX 2
IN2
IN 1
Page83Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Typical configuration S4/4/4( Wide band combining )
S4/4/4 Wide band combining mode , each cell is configured two DTRU and one DDPU
BSC data configuration should be Wide band combining mode Dividing receiver mode
Cabinet Top power ( dBm ) ( 46 or 47.8 ) -3.3-1.0
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
DTRU
TX 1
TCOM
RXM 1
RXM 2
RXD 1
RXD 2
TX 2
IN2
IN 1
DTRU
TX 1
TCOM
RXM 1
RXM 2
RXD 1
RXD 2
TX 2
IN2
IN 1
Page84Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Typical Configuration S1/2/1 S1/2/1,cell1 and cell 3 share one D
TRU, cell 2 need one DTRU and one DDPU
BSC data configuration should be No combining mode Independent receiver mode No combining mode Dividing receiver mode
Cabinet Top power ( dBm ) ( 46 or 47.8 ) -1.0
DTRU1
DTRU2
DTRU
TX 1
TCOM
RXM 1
RXM 2
RXD 1
RXD 2
TX 2
IN2
IN 1
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
DTRU
TX 1
TCOM
RXM 1
RXM 2
RXD 1
RXD 2
TX 2
IN2
IN 1
Page85Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Typical configuration S8/8/8 S8/8/8 cell 1 and cell 3 are c
onfigured 4 DTRU,2 DCOM and 1 DDPU
BSC data configuration should be
Wide band combining mode
Dividing receiver mode Cabinet top power ( dBm )
( 46 or 47.8 ) -3.3-3.3-1.0 DTRU
TX 1
TCOM
TX 2
IN2
IN 1
TX 2
TX1
DTRU
TX 1
TCOM
TX 2
IN2
IN 1
Tx-com
DTRU
TX 1
TCOM
TX 2
IN2
IN 1
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
TX 2
TX1
DTRU
TX 1
TCOM
TX 2
IN2
IN 1
Tx-com
DCOM DCOM
Page86Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Typical configuration S8/8/8 S8/8/8 cell2 is configured
4 DTRU,2 DCOM and 2 DDPU, cell 2 need cross the cabinet
BSC data configuration should be
Wide band combining mode
Dividing receiver mode Cabinet top power ( dB
m ) ( 46 or 47.8 ) -3.3-3.3-
1.0 Attention : only support R
F hoppingDTRU
TX 1
TCOM
TX 2
IN2
IN 1
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
TX 2
TX1
DTRU
TX 1
TCOM
TX 2
IN2
IN 1
Tx-com
RF-EX1
RF-EX2
RF-EX3
RF-EX4
DTRU
TX 1
TCOM
TX 2
IN2
IN 1
DDPU
TX B
RXB1
RXA1
RXA2
RXA3
RXA4
RXB2
RXB3
RXB4
TX A
TX 2
TX1
DTRU
TX 1
TCOM
TX 2
IN2
IN 1
Tx-com
RF-EX1
RF-EX2
RF-EX3
RF-EX4
DCOM DCOM
Page87Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Combined Cabinet Signal Cables
The connection of the signal cables of the combined cabinet is
as follows:
The main and slave cabinets are connected by the data
cables, control cables, and clock cables
The main and slave combined cabinets are connected by the
clock cables and control cables
The main and slave cabinets and combined cabinets require
the DIP switches
Slave
cabinet
of main
cabinet
group
Main
cabinet
of main
cabinet
group
Main
cabinet
of
slave
cabinet
group
Slave
cabinet
of
slave
cabinet
group
Data cable
Clock cable
Control cableClock cable
Control cableData cable
Clock cable
Control cable
Page88Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Summary
Functions and features of BTS3012
BTS3012 hardware structure
Antenna and feeder system
Typical configuration
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