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Internal
OME201102 HUAWEI BTS3012
Hardware Structure
ISSUE 1.0
HUAWEI TECHNOLOGIES CO., LTD. Page 2All rights reserved
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
HUAWEI TECHNOLOGIES CO., LTD. Page 3All rights reserved
References
� BTS3012 Technical Manual
� BTS3012 Installation Manual
� BTS3012 User Manual
HUAWEI TECHNOLOGIES CO., LTD. Page 4All rights reserved
Chapter 1 OverviewChapter 1 Overview
Chapter 2 System ComponentsChapter 2 System Components
Chapter 3 Signal ProcessingChapter 3 Signal Processing
Chapter 4 Antenna and Feeder SystemChapter 4 Antenna and Feeder System
Chapter 5 Typical configurationChapter 5 Typical configuration
HUAWEI TECHNOLOGIES CO., LTD. Page 5All rights reserved
Location
OMC: Operation and Maintenance CenterVM: Voice Mailbox
SMC: Short Message Center VLR: Visitor Location RegisterMSC: Mobile Switching Center
EIR: Equipment Identity Register AUC: Authentication CenterHLR: Home Location Register
BSC: Base Station ControllerBTS: Base Transceiver StationMS: Mobile Station
PSTN ISDN
PSPDN
Um Interface
BTS3012
BTS3012
BTS3012
BTS3012
OMC
HLR/AUC/EIR
BSC
MSC/VLR
SMC/VM
A Interface
MAPM
AP
TUP,ISUPMS
MS
MS
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Features and Functions
� Support GSM800M、850M、900M、1800M、1900M
� Support networking topology includes star, tree, chain and 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
coverage
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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
� The DTRU of the BTS3012 can be inserted into
BTS30/BTS312 with -48V DC power supply
HUAWEI TECHNOLOGIES CO., LTD. Page 8All rights reserved
Chapter 1 OverviewChapter 1 Overview
Chapter 2 System ComponentsChapter 2 System Components
Chapter 3 Signal ProcessingChapter 3 Signal Processing
Chapter 4 Antenna and Feeder SystemChapter 4 Antenna and Feeder System
Chapter 5 Typical configurationChapter 5 Typical configuration
HUAWEI TECHNOLOGIES CO., LTD. Page 9All rights reserved
Hardware structure
TMA TMA
DTRU DAFU
Antenna and feedersubsystem
Forepart of RFSubsystem
TMA TMA
DTRU DAFU
TMA TMA
DTRU DAFU
Double transceiver
subsystem
DATU
Um Interface
DATU
fiber
E1
Abis Interface
MELC
Common subsystem
NFCB
Metro 100
DTMU
DEMU
E1
BITSMonitor
TBUS/DBUS/CBUS
MS
FH_BUS
Extension
cabinet
HUAWEI TECHNOLOGIES CO., LTD. Page 10All rights reserved
BTS3012 Cabinet and BoardsD D D D
Wiring & Air Inlet
Wiring
DDPU
DCOM
DCOM
DDPU
DCOM
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
Wiring
FAN
Air Inlet
MLC
Power andEMC
Transmission Unit
DDPU
ELC
ELC
SAC
Transmission Unit
DTM
U
DTM
U
DEM
U
D
C
CU
D
C
SU
D
A
TU
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BTS3012 Cabinet and Boards
NodeB Fan Controlling and monitoring Board FAN Box
Cabinet Top Backplane for DTRU BTSDCTB
Environment Monitoring Unit for DTRU BTSDEMU
Combined cabinet Signal connection Unit for DTRU BTSDCSU
Signal Access Card for DTRU BTSDSAC
E1 Signal Lightning-Protection Card for DTRU BTSDELC
Monitor Signal Lightning-Protection Card for DTRU BTSDMLC
Antenna and TMA Control Unit for DTRU BTSDATU
Combining Unit for DTRU BTSDCOM
Dual Duplexer Unit for DTRU BTSDDPU
Antenna Front-end Unit for DTRU BTSDAFU
Cable Connection Unit for DTRU BTSDCCU
Transmission & Timing & Management Unit for DTRU BTSDTMU
Double Transceiver UnitDTRU
DescriptionAbbreviations
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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
HUAWEI TECHNOLOGIES CO., LTD. Page 13All 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
active and standby boards
� Providing local MMI maintenance of the 10 M network port
� Controlling, maintaining, and operating the BTS
� Providing fault management, configuration management,
performance management, and security management
� Supporting 8-route digital alarm input. Two routes are lightning
arrester failure alarm detection
HUAWEI TECHNOLOGIES CO., LTD. Page 14All rights reserved
Structure of DTMU
MCK
OML
DBUS
CBUS2
Clock
BIUDTRU
DTMU
BSC
MCUMMI
LMT
Abis
External
synchronizedclockSubrack number
and clock
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Indicators on DTMU
�E1 port 1 remote end alarm occurs when SWT is out�E1 port 5 remote end alarm occurs when SWT is on
Fast flash (4 Hz)
�E1 port 1 near end alarm occurs when SWT is out�E1 port 5 near end alarm occurs when SWT is on
On
�E1 port 1 is normal when SWT is out �E1 port 5 is normal when SWT is on
OffIndicates the transmission
status of E1 port 1 and
port 5
GreenLIU1
LockFast flash (1 Hz)
Pull-inFast flash (4 Hz)
Free-runOn
AbnormalOffIndicates the
clock statusGreenPLL
ActiveOn
StandbyOff Indicates whether the board is
active or
standby
GreenACT
Power failure of the boardOff
BSC data loadingFast flash at uncertain
intervals
NormalSlow flash (0.5 Hz)
OML is blockedSlow flash (0.25 Hz)Indicates
operationGreenRUN
MeaningStatusDescriptionColorIndicator
RUN
ACT
PLL
LIU1
LIU2
LIU3
LIU4
SWT
ALM
RST
MMI
T2M
FCLK
T13M
DTMU
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Hardware alarmOn
No hardware alarmOffAlarm indicatorsRedALM
LIU1 to LIU4 indicate the transmission status of E1 port
5 to 8.On
LIU1 to LIU4 indicate the transmission status of E1 port
1 to 4.OffIndicates handover
status of E1GreenSWT
�E1 port 4 remote end alarm occurs when SWT is out
�E1 port 8 remote end alarm occurs when SWT is on
Fast flash (4
Hz)
�E1 port 4 near end alarm occurs when SWT is out�E1 port 8 near end alarm occurs when SWT is on
On
�E1 port 4 is normal when SWT is out�E1 port 8 is normal when SWT is on
OffIndicates the transmission status of
E1 port 4 and port 8
GreenLIU4
�E1 port 3 remote end alarm occurs when SWT is out�E1 port 7 remote end alarm occurs when SWT is on
Fast flash (4
Hz)
�E1 port 3 near end alarm occurs when SWT is out
�E1 port 7 near end alarm occurs when SWT is on
On
�E1 port 3 is normal when SWT is out�E1 port 7 is normal when SWT is on
OffIndicates the transmission status of
E1 port 3 and port 7
GreenLIU3
�E1 port 2 remote end alarm occurs when SWT is out�E1 port 6 remote end alarm occurs when SWT is on
Fast flash (4
Hz)
�E1 port 2 near end alarm occurs when SWT is out�E1 port 6 near end alarm occurs when SWT is on
On
�E1 port 2 is normal when SWT is out
�E1 port 6 is normal when SWT is on
OffIndicates the
transmission status of
E1 port 2 and port 6
GreenLIU2
MeaningStatusDescriptionColorIndicator
Indicators on DTMU
RUN
ACT
PLL
LIU1
LIU2
LIU3
LIU4
SWT
ALM
RST
MMI
T2M
FCLK
T13M
DTMU
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Interface on the DTMU panel
Near end maintenance network portRJ45MMI
13M primary reference clockSMB (female)T13M
216.7 Hz frame clockSMB (female)FCLK
Outputs reference testing clockSMB (female)T2M
DescriptionTypeInterface
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Functions of DEMU
� The DEMU is placed in slots 2 to 4 and slot 7 of the common 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
� Guaranteeing normal operation of the equipment
� Output of 6-route Boolean value and input of 32-route main node alarms
DMLC DEMU
CBUS3Monitor signal
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Functions of DCSU
� The Combined Cabinet Signal
Connection 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
DCSU
DTRB
DCTB
DCCU
DEMU
DATU
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The interfaces on the DCSU panel
CC_IN
CC_OUT
TO_DTRB
TOP2
DCSU
Connecting to the cabinet top subrack through cables
DB26 (female)TOP2
Connecting to the DTRB through cablesMD64 (female)To_DTRB
For cable input to the combined cabinet MD64 (female)CC_IN
For cable output from the combined cabinetMD64 (female)CC_OUT
DescriptionTypeSilk- Screen
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GM51DCSU VERBSW6
SW9
SW14
SW13
SW12
SW7
SW10
SW8
SW5
SW4
SW3
SW11
SW2
SW1
Switch of DCSU
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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
DCCU
NFCB
DCTB
DCSU
DEMU
DATU
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The interfaces on the DCCU panel
POWER
DCCU
To_FAN
TO_TOP1
TRAN
For power input of the common unit3V3 POWER
Connects to the cabinet top subrack through cables
MD64 (female)
TO_TOP1
Connects to the fan panel through cablesDB26 (female)
To_FAN
For E1 signal inputMD64 (female)
TRAN
DescriptionTypeSilk-
Screen
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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 CBUS3 for
control and alarm report
DATU
RUN
ACT
ALM
ANT0
ANT1
ANT2
ANT3
ANT4
ANT5
HUAWEI TECHNOLOGIES CO., LTD. Page 25All 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)
D
M
L
C
D
E
L
C
D
E
L
C
D
S
A
C
DC
F
CK
B2
CK
B1
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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/humidity/temperature sensor signal
input
SWIN
SWOUT
DMLC
AIN
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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
HUAWEI TECHNOLOGIES CO., LTD. Page 28All 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 arrester failure
alarm
� Access protection of BITS clock input
DSAC
CO
M1
EA
CS
YN
CC
OM
2S
1+
S1
-S2
+S
2-
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Double transceiver subsystem
� DTRU(Double Transceiver Unit)
� DTRB
DTRB
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
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Functions of DTRU
� RF subsystem transmit part. Converts the basband signals on the two
TRXs 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
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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
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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
workingGreenACT
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
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Indicators 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 DTRU
TX1
IN1
TCOM
IN2
TX2
RST
RUN
ACT
ALM
RF_IND
PWR
RXM1
RXD1
RXM2
RXD2
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DTRU transmit mode
� Transmit independence
� Transmit diversity
� PBT
� Wideband transmit combination
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DTRU transmit mode-transmit independence
TCOM
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
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DTRU transmit mode-transmit diversity
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
Man made multi way
combinercombiner
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DTRU transmit mode-PBT
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
Same phase
combinercombiner
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DTRU transmit mode-wideband transmit combination
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
combinercombiner
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DTRU receive mode
� Receive independence
� Receive diversity
� 4-way receive diversity
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DTRU receive mode- Receive independence
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
dividerdivider
combinercombiner
dividerdivider
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DTRU receive mode- Receive diversity
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
dividerdivider
dividerdivider
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DTRU receive mode- 4-way receive diversity
TRX0TRX0
TX
TRX1TRX1
TXdividerdivider
dividerdivider
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
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Intra structure of DTRU
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
dividerdivider
dividerdivider
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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
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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
HUAWEI TECHNOLOGIES CO., LTD. Page 46All rights reserved
Functions of DDPU
� The DDPU is intermixed with the DCOM in the DAFU subrack
of the forepart 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
HUAWEI TECHNOLOGIES CO., LTD. Page 47All rights reserved
Functional structure of the DDPU
ANTB
TXA
TXB
RXA4
duplexerduplexer dividerdivider duplexerduplexer dividerdivider
ANTA
RXA1
RXA2RXA3
RXB1
RXB2RXB3RXB4
HUAWEI TECHNOLOGIES CO., LTD. Page 48All rights reserved
Indicators on DDPU
No standing wave alarm occur to Channel BOff
Standing wave critical alarm occurs to
Channel BOn
Standing wave alarm occurs to Channel BSlow flash (0.5 Hz)Indicates a standing
wave alarm of Channel
B
RedVSWRB
No standing wave alarm occurs to Channel AOff
Standing wave critical alarm occurs to
Channel A
On
Standing wave alarm occurs to Channel ASlow flash (0.5 Hz)Indicates a standing wave alarm of Channel
A
RedVSWRA
The board is starting or loading the newest
application programs
Slow flash (0.5 Hz)
No faultOff
There is alarm(including standing wave alarm)
and the board is faulty.
On (including high-
frequency flash)
Indicates an alarmRedALM
The DTMU is sending configuration
parameters to the DDPU or the DDPU is
loading software programs.
Fast flash (2.5 Hz)
The board is running normally.Slow flash (0.5 Hz)
There is no power supply or the board is
faulty.
Off
There is power supply and the board is faulty.OnIndicates the DDPU is
running and powerd onGreenRUN
MeaningStatusDescriptionColorIndicator
RUN
ALM
VSWRA
RXA1
RXA2
RXA3
RXA4
RXB1
RXB2
RXB3
RXB4
DDPU
TXA
TXB
COM
POWER
VSWRB
ANTA
ANTB
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Interface on DDPU
RF jumper portDIN (female)ANTB
RF jumper portDIN (female)ANTA
Diversity 4 output portSMA (female)RXB4
Diversity 3 output portSMA (female)RXB3
Diversity 2 output portSMA (female)RXB2
Diversity 1 output portSMA (female)RXB1
Main 4 output portSMA (female)RXA4
Main 3 output portSMA (female)RXA3
Main 2 output portSMA (female)RXA2
Main 1 output portSMA (female)RXA1
�Input of the TX signals sent from the DTRU�Input of the DCOM combining signals
N (male)TXB
�Input of the TX signals sent from the DTRU�Input of the DCOM combining signals
N (male)TXA
Power supply input3V3POWER
Sends to the DDPU control signals, communication signals,
clock signals and subrack number
DB26
(female)COM
DescriptionTypeInterface
RUN
ALM
VSWRA
RXA1
RXA2
RXA3
RXA4
RXB1
RXB2
RXB3
RXB4
DDPU
TXA
TXB
COM
POWER
VSWRB
ANTA
ANTB
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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
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Interfaces on DCOM
TX signal input from the DTRU to DCOMN (male)TX2
TX signal input from the DTRU to DCOMN (male)TX1
Output of combining signals from the DCOM
to DDPU
N (male)TX—
COM
For indentification of the board type of DCOM
and on-site status
DB26
(female)
ONSHEL
L
DescriptionTypeInterface
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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
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Indicators on FAN BOX
There is no power supply and the
board is faulty
OffGreen or red or
orange
The board software is being ungradedOnOrange (red
and green)
The board is running normallySlow flash (0.5
Hz)
Green
Alarm occurs to the boardFast flash (4 Hz)Red
Communication between the NFCB
and the DTMU is abnormal. There is
no alarm
Fast flash (4 Hz)GreenSTATE
MeaningStatusColorIndicator
HUAWEI TECHNOLOGIES CO., LTD. Page 54All rights reserved
Chapter 1 OverviewChapter 1 Overview
Chapter 2 System ComponentsChapter 2 System Components
Chapter 3 Signal ProcessingChapter 3 Signal Processing
Chapter 4 Antenna and Feeder SystemChapter 4 Antenna and Feeder System
Chapter 5 Typical configurationChapter 5 Typical configuration
HUAWEI TECHNOLOGIES CO., LTD. Page 55All 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
HUAWEI TECHNOLOGIES CO., LTD. Page 56All rights reserved
DL Signal Flow
D
D
PU
Um
BSC
BTS3012 Cabinet
MSAntennaFeeder
Abis
DT
R
U
DT
M
U
HUAWEI TECHNOLOGIES CO., LTD. Page 57All 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
HUAWEI TECHNOLOGIES CO., LTD. Page 58All rights reserved
UL Signal Flow
D
A
FU
Um
BSC
BTS3012 Cabinet
MSAntennaFeeder
Abis
DT
R
U
DT
M
U
HUAWEI TECHNOLOGIES CO., LTD. Page 59All 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
HUAWEI TECHNOLOGIES CO., LTD. Page 60All rights reserved
Signaling Processing Signal Flow
BTS3012
DDPUDTRUDTMU
BSCAbis
HUAWEI TECHNOLOGIES CO., LTD. Page 61All 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
analyzing the status of all boards and transmits the information to
the BSC through the Abis interface
HUAWEI TECHNOLOGIES CO., LTD. Page 62All rights reserved
Clock Signal Flow
DTMUBoards in main
cabinet
Boards in slavecabinet
A-bis
Clock distributioncable between
cabinets
HUAWEI TECHNOLOGIES CO., LTD. Page 63All rights reserved
Clock Signal Flow Description
� The clock signal flow includes the following steps:
� The external reference clock is transmitted to the clock
module 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 cabinet such as the DTRU and the DDPU
� The clock signals are transmitted to the modules in the
slave cabinets through the clock distribution cable
HUAWEI TECHNOLOGIES CO., LTD. Page 64All rights reserved
Chapter 1 OverviewChapter 1 Overview
Chapter 2 System ComponentsChapter 2 System Components
Chapter 3 Signal ProcessingChapter 3 Signal Processing
Chapter 4 Antenna and Feeder SystemChapter 4 Antenna and Feeder System
Chapter 5 Typical configurationChapter 5 Typical configuration
HUAWEI TECHNOLOGIES CO., LTD. Page 65All rights reserved
Antenna Feeder subsystem
Antenna
TMA
Antennasupport
Jumper
JumperFeeder
Jumper
AntennaFeeder
JumpersTMA
HUAWEI TECHNOLOGIES CO., LTD. Page 66All 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
HUAWEI TECHNOLOGIES CO., LTD. Page 67All 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
Om nidirectional
antennaSingle polarization antenna
Dual polarization
antenna
HUAWEI TECHNOLOGIES CO., LTD. Page 68All 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
HUAWEI TECHNOLOGIES CO., LTD. Page 69All 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
HUAWEI TECHNOLOGIES CO., LTD. Page 70All 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
Sending
filter
Receivingfilter
Bypass
DC
BTS
TMA
Feeder
Receivingfilter
HUAWEI TECHNOLOGIES CO., LTD. Page 71All rights reserved
Antenna Pattern
� The antenna pattern describes the radiating abilities of
antennas in all directions
360°
Omni Antenna Directional antenna
120° 90° 65°
HUAWEI TECHNOLOGIES CO., LTD. Page 72All 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
HUAWEI TECHNOLOGIES CO., LTD. Page 73All rights reserved
Chapter 1 OverviewChapter 1 Overview
Chapter 2 System ComponentsChapter 2 System Components
Chapter 3 Signal ProcessingChapter 3 Signal Processing
Chapter 4 Antenna and Feeder SystemChapter 4 Antenna and Feeder System
Chapter 5 Typical configurationChapter 5 Typical configuration
HUAWEI TECHNOLOGIES CO., LTD. Page 74All rights reserved
Configuration Principles
� The configuration principles of the BTS3012 cabinet are as follows:
�The minimum antenna rule
use as few as possible antennas for cell configuration.
�The minimum cabinet rule
use as few as possible cabinets for cell configuration.
�The complete synchronous cell rule
all TRXs of a synchronous cell are configured in the same cabinet group
�The basic cabinet priority rule
TRXs 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
HUAWEI TECHNOLOGIES CO., LTD. Page 75All rights reserved
Configuration Principles
� The BTS3012 supports the omnidirectional coverage and the directional
coverage.
� The BTS3012 supports the combination of two cabinets to form one group
and 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
function). The DCOM is required when the DTRUs are not sufficient.
� The BTS3012 uses DTRU. One single cabinet supports up to 12 TRXs in
full configuration.
� The maximum number of carriers is eight in a cell with a pair of dual
polarization antennas or two omnidirectional antennas of a single
sectorized cell
HUAWEI TECHNOLOGIES CO., LTD. Page 76All rights reserved
Typical configuration S1/1/1(transmit independence mode)
� S1/1/1 transmit independence mode,
Each cell is configured one DTRU and
one DDPU.
� The connection for one cell is showed
in the right slide
� BSC data configuration should be :
transmit independence mode ,receive
independence 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
HUAWEI TECHNOLOGIES CO., LTD. Page 77All rights reserved
Typical configuration S1/1/1(transmit diversity+4-way receive diversity)
� S1/1/1 transmit diversity+4-way
receive mode,each cell is
configured one DTRU and two
DDPU
� BSC data configuration should be :
� transmit diversity mode
� 4-way receive 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
HUAWEI TECHNOLOGIES CO., LTD. Page 78All rights reserved
Typical configurationS2/2/2(transmit independence 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 slide
� BSC data configuration should be :
� transmit independence mode ,receive
diversity 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
HUAWEI TECHNOLOGIES CO., LTD. Page 79All rights reserved
Typical configurationS2/2/2(PBT mode)
� 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 :
PBT mode
receive independence mode
� Cabinet Top power(dBm):49
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
HUAWEI TECHNOLOGIES CO., LTD. Page 80All rights reserved
Typical configuration S4/4/4( wideband transmit combination mode )
� S4/4/4 wideband transmit combination
mode ,each cell is configured two
DTRU and one DDPU
� BSC data configuration should be :
wideband transmit combination
mode ,receive diversity 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
HUAWEI TECHNOLOGIES CO., LTD. Page 81All rights reserved
Typical Configuration S1/2/1
� S1/2/1,cell1 and cell 3 need
share one DTRU, cell 2 need
configure one DTRU and one
DDPU.
� BSC data configuration
should be :
DTRU1:transmit
independence mode,receive
independence mode;
DTRU2:transmit
independence mode ,
receive independence
diversity mode 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
HUAWEI TECHNOLOGIES CO., LTD. Page 82All rights reserved
Typical configuration S8/8/8
� S8/8/8 cell 1 and cell 3
are configured 4
DTRU,2 DCOM and 1
DDPU
� BSC data configuration
should be :wideband
transmit combination
mode ,receive diversity
mode
� Cabinet top power
(dBm):(46 or 47.8)
-3.3-3.3-1.0DTRU
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
HUAWEI TECHNOLOGIES CO., LTD. Page 83All 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:wideband
transmit combination
mode ,receive diversity
mode
� Attention:only support
frequency hopping
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
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
HUAWEI TECHNOLOGIES CO., LTD. Page 84All rights reserved
Combined Cabinet Signal Flow
� 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 cable
Clock cable
Control cableData cable
Clock cable
Control cable
HUAWEI TECHNOLOGIES CO., LTD. Page 85All rights reserved
� Functions and features of BTS3012
� BTS3012 hardware structure
� Antenna and feeder system
� Typical configuration
SummarySummary