HUAWEI BTS3012AE Hardware Structure
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HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
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Internal
OME301102HUAWEI BTS3012AEHardware 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 BTS3012AE
Master the BTS3012AE hardware structure
Master the cable connection of BTS3012AE
Some trouble shooting cases
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References
BTS3012AE Technical Manual
BTS3012AE Installation Manual
BTS3012AE User Manual
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Chapter 1 OverviewChapter 1 Overview
Chapter 2 System ComponentsChapter 2 System Components
Chapter 3 Signal ProcessingChapter 3 Signal Processing
Chapter 4 Typical configurationChapter 4 Typical configuration
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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
BTS3012AE
BTS3012AE
BTS3012AE
BTS3012AE
OMC
HLR/AUC/EIR
BSC
MSC/VLR
SMC/VM
A Interface
MAPMAP
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
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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
Diversity transmit ,Four diversity receiver
Support Power Boost Technology (PBT)
Support more various transmission mode includes E1, STM-1,
microwave, and satellite transmission
All the external cables are introduced into the cabinet through
the bottom of the cabinet. A space with 200 mm height is
reserved for the cabling, which greatly facilitates the
maintenance
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Features and Functions
The BTS3012AE provides two storage battery cabins: –48 V 150 AH cabin
and –48 V 50 AH cabin. Under S4/4/4 site configuration, the internal 200
AH can supply power for four hours when the traffic volume is in normal
level. The external storage batteries can provide up to 600 AH power.
Under S4/4/4 site configuration, the external storage batteries can supply
power for more than four hours when the traffic volume is in normal level
Supporting 110 VAC dual-live power input, 220 VAC single-phase power
input, and 220 VAC three-phase power input. The BTS3012AE supports a
wide range of voltage and frequency
Having complete battery management and environment monitoring
functions
HUAWEI TECHNOLOGIES CO., LTD. Page 9All rights reserved
Chapter 1 OverviewChapter 1 Overview
Chapter 2 System ComponentsChapter 2 System Components
Chapter 3 Signal ProcessingChapter 3 Signal Processing
Chapter 4 Typical configurationChapter 4 Typical configuration
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Hardware structure
Um
RFsubsystem
DAFU
DAFU
DTRU
Double-transceiversubsystem
CBUS/DBUS/TBUS
DTRU
Fiber
E1
Combined cabinetor cabinet group 1
BITS
Common subsystemMonitor
DAFUDTRU
DATU
equipment (optional)
E1
DTMU
Abis
AC
DPMUBattery
Power supply subsystem
Monitoringsubsystem PSU
Cabinetgroup 2
NFCB
Sig
nal p
rote
ctio
nsu
bsys
tem
TMA TMA
TMA TMA
TMA TMA
Optical transmission
HUAWEI TECHNOLOGIES CO., LTD. Page 11All rights reserved
BTS3012AE Cabinet and Board
DC
PD
U
DT
MU
DA
TU
DC
SU
DC
CU
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
BAT -48V 150AH
Wire holderFAN
Air inlet
PSU
Cable in/outEMI
Wire holder
DT
MU
Wire holder
Air inlet
Tra
nsm
issi
on u
nit
BAT -48V 50AH
Air return
AC PDU
PSU
Air return
DPMU
PSU
PSU
PSU PSU
PSU PSU
DDPU
DDPU
DDPU
DCOM
DCOM
(A)
DCOM
DGLUDMLU/DGLU
DELU
NPMI
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BTS3012AE Cabinet and Board
DC
PD
U
DT
MU
DA
TU
DC
SU
DC
CU
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
BAT -48V 150AH
Wire holder
FANAir inlet
PSU
Cable in/outEMI
Wire holder
DT
MU
Air inlet
Transmission unit
Air return
AC PDU
PSU
Air return
DPMU
PSU
PSU
PSU PSU
PSU PSU
Wire holder
(B)
DDPU
DDPU
DDPU
DCOM
DCOM
DCOM
DGLUDMLU/DGLU
DELU
NPMI
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BTS3012AE Cabinet and Board
The –48 V 50 AH storage cabin of the BTS3012AE can be
removed to form a 7 U space with the reserved 2 U space. This
space can be used to accommodate transmission equipment
or other equipment of the operators
Figure (A) lists the full configuration of the BTS3012AE under
the combination of 150 AH + 50 AH + 2 U
Figure (B) lists the full configuration of the BTS3012AE under
the combination of 150 AH + 7U
HUAWEI TECHNOLOGIES CO., LTD. Page 14All rights reserved
BTS3012AE Board and Module
Board and Module Full Spelling
DTRU Double Transceiver Unit
DTMU Transmission & Timing & Management Unit for DTRU BTS
DCCU Cable Connection Unit for DTRU BTS
DCSU Combined cabinet Signal 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
DELU E1 Signal Lightning-Protection Unit for DTRU BTS
DMLU Monitor Signal Lightning-Protection Unit for DTRU BTS
DGLU Cabinet Group signal Lightning-Protection Unit for DTRU BTS
PSU Power Supply Unit
DPMU Power and Environment Monitoring Unit for DTRU BTS
NPMI NodeB Power Monitor unit Interface Board
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Functional Architecture
The BTS3012AE uses a modular design. According to the
function of the modules, it can be divided into:
Common subsystem
Double-transceiver subsystem
RF subsystem
Power supply subsystem
Monitoring subsystem
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Common Subsystem
The BTS common subsystem performs the following functions:
Managing and controlling other subsystem and modules.Importing E1 sig
nals
Providing clock for the BTS
Controlling the Remote Electric Tilt (RET), and transmitting the signals fro
m the TMA to the BTS through the feeder cable
The signal protection subsystem performs the following functions:
Protecting E1 signals from lightning.Protecting monitor signals from lightni
ng
Connecting cabinets to form combined cabinets or a cabinet group
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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
DELU E1 Signal Lightning-Protection Unit for DTRU BTS
DGLU Combined Group Signal Lightning-Protection Unit for DTRU
DMLU Monitor Signal Lightning-Protection Unit for DTRU BTS
DSCB Cabinet Signal Connection Backboard for DTRU BTS
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Functions of DTMU
Providing 4-route or 8-route E1 input , backup between the ac
tive and standby boards
Providing local MMI maintenance of the 10 M network port
Controlling, maintaining, and operating the BTS
Providing fault management, configuration management, perfor
mance management, and security management
Supporting 8-route digital alarm input. Two routes are lightning
arrester failure alarm detection
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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
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 board
ACT Green Indicates whether the board is active or standby
Off Standby
On Active
PLL Green Indicates the clock status
Off Abnormal
On Free-run
Fast flash (4 Hz) Pull-in
Fast 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
RUN
ACT
PLL
LIU1
LIU2
LIU3
LIU4
SWT
ALM
RST
MMI
T2M
FCLK
T13M
DTMU
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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
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Interface on the DTMU panel
Interface 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
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Functions of DCSU
The Combined Cabinet Signal Connection
Unit for DTRU BTS (DCSU) is placed in slo
t 5 of the common subrack, which is locate
d in the lower part of the cabinet. There is
only one DCSU and it is mandatory
The DCSU transfers signals for the combin
ed cabinet and cabinet group between the
common subrack and the cabinet top subra
ck
DCMB
DTMU
DCSUDTRB
DCTB
DCCU
DEMU
DATU
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Functions of DCCU
The DCCU is placed in slot 6 of the co
mmon subrack. There is only one DCC
U and it is mandatory
Converting the input and output signals
of the common subrack.
Inputting the power of the common sub
rack
Providing EMI filtering
DCMB
DTMU
DCCUNFCB
DCTB
DCSU
DEMU
DATU
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The interfaces on the DCCU panel
POWER
DCCU
To_FAN
TO_TOP1
TRAN
Silk-Screen
Type Description
TRANMD64 (female)
For E1 signal input
To_FANDB26 (female)
Connects to the fan panel through cables
TO_TOP1MD64 (female)
Connects to the cabinet top subrack through cables
POWER 3V3 For power input of the common unit
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Functions of DATU
The DATU is placed in slots 2 to 4 and slot 7 of the co
mmon 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 co
ntrol and alarm report
DATU
RUN
ACT
ALM
ANT0
ANT1
ANT2
ANT3
ANT4
ANT5
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Functions of DSCB
The DSCB is in the signal lightning protection subrack. It is used to transfer sig
nals
TO S
LAVE
-M
ASTE
R(F
ROM
DCS
U)
TOP
(FRO
M D
CCU)
TO D
CCU
E1
TO D
CSU
TOP
TO 3
G E1
TO D
AFU
0-2
TO D
AFU
3-5
TO S
LAVE
CAB
INET
TO S
LAVE
GRO
UP1
TO S
LAVE
GRO
UP2
TO N
PMI
DELU
DELU
DELU
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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 baseband 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
Divides 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 transmit diversity and 4-way receive diversity
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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
Indicator Color Description Status Meaning
RUN Green Indicates the running and power-on of the DTRU
On There is power supply or the board is faulty.
Off There is no power supply and the board is faulty.
Slow flash (0.25 Hz)
The board is starting.
Slow flash (0.5 Hz)
The board is running.
Fast flash (2.5 Hz) The DTMU is sending configuraiton parameters to the DTRU.
ACT Green Indicates the TRX is working
On 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.
Off Communication between DTRU and DTMU is not set up
Slow flash (0.5Hz) Only parts of the logic channels are working normally (including after TRX mutual aid).
ALM Red Indicates alarm On (including high-frequency flash)
Critical alarm occurs to the board.
Off The board is normal.
RF_IND Red RF interface indicators
On Standing wave alarm
Off Normal
Slow flash (0.5 Hz)
RL alarm
DTRU
TX1
IN1
TCOM
IN2
TX2
RST
RUN
ACT
ALM
RF_IND
PWR
RXM1
RXD1
RXM2
RXD2
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Indicators on DTRU
Interface Type Description
TX1 N (male) TX1 output signals: Output to the forepart of the RF when not in combiner Output to IN1 in combiner
IN1 SMA (female) Connects to TX1 in combiner
TCOM N (male) Combines and outputs IN1 and IN2 or implements PBT combined
output
IN2 SMA (female) Connects to TX2 in combiner
TX2 N (male) TX2 output signals: Output to the forepart of the RF when not in combiner Output to IN2 in combiner
RXM1 SMA (female) Main or diversity 1 receive port of carrier 1
RXD1 SMA (female) Diversity 1 or 2 receive port of carrier 1
RXM2 SMA (female) Main receive port of carrier 2 or Diversity 3 receive port of carrier 1
RXD2 SMA (female) Diversity receive port of carrier 2 or Diversity 4 receive port of
carrier 1
PWR 3V3 Power supply
DTRU
TX1
IN1
TCOM
IN2
TX2
RST
RUN
ACT
ALM
RF_IND
PWR
RXM1
RXD1
RXM2
RXD2
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DTRU transmit mode
No combining
Diversity transmit
Power Boost Technology
Wideband transmit combining
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DTRU transmit mode-No combining
TCOM
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
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DTRU transmit mode-Power Boost Technology
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
Same phase
combinercombiner
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DTRU transmit mode-wideband transmit combining
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
combinercombiner
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DTRU receive mode
Dividing receiver
Independent receiver
Four diversity receiver
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DTRU receive mode- Dividing receiver
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
dividerdivider
combinercombiner
dividerdivider
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DTRU receive mode- Independent receiver
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
dividerdivider
dividerdivider
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DTRU receive mode- Four diversity receiver
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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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
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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 t
he antenna through the duplexer
Sending signals from the antenna after amplifying and quarteri
ng 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
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Functional structure of the DDPU ANTB
TXA
TXB
RXA4
duplexerduplexer dividerdivider duplexerduplexer dividerdivider
ANTA
RXA1RXA2RXA3
RXB1RXB2RXB3RXB4
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Indicators on DDPU
Indicator Color 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
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Interface on DDPU
Interface Type Description
COM DB26 (female)
Sends to the DDPU control signals, communication signals, clock signals and subrack number
POWER 3V3 Power supply input
TXA N (male) Input of the TX signals sent from the DTRUInput of the DCOM combining signals
TXB N (male) Input of the TX signals sent from the DTRUInput of the DCOM combining signals
RXA1 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
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Functions of FAN BOX
The FAN BOX forms a loop with the air inlet box to provide forc
ed ventilation and dissipation for the common subrack, the DT
RU subrack, and the DAFU subrack
The FAN Box is mandatory with four independent axial flow fan
s. The fans' speed and running status are controlled by the Fan
Controlling and Monitoring Board
FANSTATE
COMPWR
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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
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Power Supply Subsystem
The DPMU
Monitors the PSU, storage batteries, and the internal environment
of the cabinet
Inputs 6-route external Boolean values and outputs 2-route
Boolean values
PSU
Converts the external power into –48 VDC, and then supply the –
48 VDC power for each BTS3012AE module
NPMI
Transmit the monitoring signals of the BTS3012AE
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Functions of DPMU
The DPMU is in the power subrack of the cabine
t. The BTS3012AE requires only one DPMU
The DPMU performs the following functions:
Power system management and battery charge
and discharge management
Water, smoke, door status, standby Boolean val
ue, temperature and humidity, battery temperatu
re, and standby analog report
Power distribution check and power distribution
alarm report
Boolean value alarm report
RUN ALM -48V 0V BAT
OFF
ON
RS232/RS422
COM
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Indicators on DPMU
Indicator Color Status Meaning
RUN Green Slow flash (1 s on, 1 s off)
The board is running normally.
Fast flash (125 ms on, 125 ms off)
No hardware fault, but errors occur to the communication with DTMU.The communication with DTMU fails if this situation lasts for two seconds.
Steady on/steady off
The board is dysfunctional or the indicator is out of control.
ALM Red Steady on No AC mains alarm, AC mains overvoltage or undervoltage alarm, busbar overvoltage or undervoltage alarm, overcurrent, battery power-off alarm, batteries broken circuit alarm, ambient temperature alarm, ambient humidity alarm, water alarm, smoke sensor alarm, power module alarm, or load power-off
Steady off No alarm
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The switch on DPMU
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Functions of PSU
The PSU is in the power subrack of the cabinet. T
he minimum configuration and maximum configura
tion of the PSU are 1+1 and 7 respectively
Transforming 220 VAC into –48 VDC
Monitoring module fault alarms (overvoltage outpu
t, no output, and FAN fault), module protection alar
ms (over-temperature protection, and overvoltage
and undervoltage protection), and AC power failur
e alarm
Monitoring battery recharge and discharge, and co
ntrolling the voltage and current of the battery
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Battery Charging
22511
25.1
KTEMPKV
TWC
f
Parameter Meaning and Range
C Capability of the battery (Ah)
W Load power (W)
T Working time (h)
TEMP Ambient temperature (ºC)
Vf Voltage at which the discharge stops (V)It is 22.5 V by default in a 24 V system.
I Discharging current
K1 T < 3h, K1 = 0.5 ─ 0.63h ≤ T ≤ 5h, K1= 0.75 ─ 0.85h ≤ T < 10h, K1= 0.85 ─ 0.9T ≥ 10h, K1 = 1
K2 I ≤ 0.1C, K2 = 0.0060.1C < I ≤ 0.5C, K2 = 0.008I > 0.5C, K2 = 0.01
Calculating Equation
The power supply is cut when the battery is not fully charged.The battery has worked for a long time.The ambient temperature is extremely low, like –10 ºC or below.
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The interface on NPMI
The NPMI is on the top of the cabinet. It is used to transmit the
monitoring signals of the BTS3012AE
JAC2 JK2
JAC1 JK1
JTD1 JTD2
JTD4 JTD5
JKM1 SMOKE DOORWATER
JTD6 JTD7
JTD3 TEM_HUM
BAT_TEM2 BAT_TEM1
FUL_ALM
J1
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Ports on NPMI
Port Connector Function
BAT_TEM2 2-pin common connector External battery temperature sensor port
BAT_TEM1 2-pin common connector Internal battery temperature sensor port
FU_ALM 2-pin common connector Battery broken circuit alarm port
JAC2–JAC1 2-pin common connector Optical coupling output control port
JK2–JK1 2-pin common connector Main contact point output control port
JTD1, JTD2, and JTD4–JTD7
4-pin common connector Main contact point alarm input port
JTD3 4-pin common connector AC lightning arrester alarm port
TEM_HUM 4-pin common connector Temperature and humidity signal input port
JKM1 2-pin common connector Lightning arrester alarm port
SMOKE 2-pin common connector Smoke sensor port
WATER 4-pin common connector Water sensor port
DOOR 2-pin common connector Door status sensor port
J1 DB50 female connector Transferring NPMI signals to the DPMU
COM1–COM4 5-pin common connector Reserved CBUS communication port
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Chapter 1 OverviewChapter 1 Overview
Chapter 2 System ComponentsChapter 2 System Components
Chapter 3 Signal ProcessingChapter 3 Signal Processing
Chapter 4 Typical configurationChapter 4 Typical configuration
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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
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DL Signal Flow
DDPU
Um
BSC
BTS3012AE Cabinet
MSAntennaFeeder
Abis
DTRU
DTMU
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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
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UL Signal Flow
DAFU
Um
BSC
BTS3012AE Cabinet
MSAntennaFeeder
Abis
DTRU
DTMU
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UL Signal Flow
The UL signal flow includes the following steps:
The antenna receives the signals transmitted from the MS. After bei
ng amplified by the TMA, the signals are transmitted to the DDPU thr
ough the feeder.The TMA is optional. It is used to compensate the fe
eder loss and enhance receiver sensitivity of the DDPU antenna port
The DDPU receives the signals and transmits the signals to the DTR
U after they are filtered by the duplexer and amplified by the LNA
The DTRU receives the signals and transmits the signals to the DT
MU after amplification and down conversion. The DTMU then transm
its the signals to the BSC through the Abis interface
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Signaling Processing Signal Flow
BTS3012AE
DDPUDTRUDTMU
BSCAbis
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Signaling Processing Signal Flow
The signaling processing signal flow includes the following step
s:
The Abis interface board receives the signaling data from th
e BSC and transmits the data to the DTMU
The DTMU performs decision and processing on the signali
ng 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 info
rmation to the BSC through the Abis interface
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Clock Signal Flow
DTMUBoards in main
cabinet
Boards in slavecabinet
A-bis
Clock distributioncable between
cabinets
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Clock Signal Flow Description
The clock signal flow includes the following steps:
The external reference clock is transmitted to the clock mod
ule in the DTMU through the Abis interface
The clock module performs phase lock and frequency divisi
on on the clock signals to generate different clock signals fo
r BTSs
The clock signals are transmitted to the modules in the mai
n cabinet such as the DTRU and the DDPU
The clock signals are transmitted to the modules in the slav
e cabinets through the clock distribution cable
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Chapter 1 OverviewChapter 1 Overview
Chapter 2 System ComponentsChapter 2 System Components
Chapter 3 Signal ProcessingChapter 3 Signal Processing
Chapter 4 Typical configurationChapter 4 Typical configuration
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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 gro
up
The basic cabinet priority rule
TRXs are configured in the basic cabinet in preference, and the numb
er of TRXs in the basic cabinet is not less than that in any extension c
abinet
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Configuration Principles
The BTS3012 supports the omnidirectional coverage and the directional
coverage
The BTS3012 supports the combination of two cabinets to form one grou
p 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 fun
ction). 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 polar
ization antennas or two omnidirectional antennas of a single sectorized c
ell
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Typical configuration S1/1/1( Diversity transmit mode ) S1/1/1 transmit independence mode , Eac
h cell is configured one DTRU and one D
DPU
The connection for one cell is showed in th
e right slide
BSC data configuration should be : trans
mit independence mode , receive indepe
ndence 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
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Typical configuration S1/1/1( Diversity transmit +Four diversity receiver ) S1/1/1 transmit diversity+4-way receive
mode , each cell is configured one D
TRU and two DDPU
BSC data configuration should be : tr
ansmit 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
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Typical configurationS2/2/2( No combining mode ) S2/2/2 transmit independence mode , Eac
h cell is configured one DTRU and one DD
PU
The connection for one cell is showed in the
right slide
BSC data configuration should be :
transmit independence mode , receive di
versity 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
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Typical configurationS2/2/2( PBT mode ) S2/2/2 PBT mode , each cell is confi
gured two DTRU and one DDPU
The connection for one cell is showed i
n the right slide
BSC data configuration should be : P
BT 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
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Typical configuration S4/4/4( wideband transmit combining mode ) S4/4/4 wideband transmit combina
tion mode , each cell is configur
ed two DTRU and one DDPU
BSC data configuration should be :wideband transmit combination mo
de , 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
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Typical Configuration S1/2/1
S1/2/1,cell1 and cell 3 need s
hare one DTRU, cell 2 need c
onfigure one DTRU and one D
DPU
BSC data configuration should
be :
DTRU1 : transmit independe
nce mode , receive independ
ence mode ; DTRU2 : tran
smit independence mode , r
eceive independence diversity
modeDTRU
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
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Typical configuration S8/8/8
S8/8/8 cell 1 and cell 3 are
configured 4 DTRU,2 DCO
M and 1 DDPU
BSC data configuration sho
uld be : wideband transmit
combination mode , receiv
e diversity mode
Cabinet top power ( dB
m ):( 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
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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 cableClock cable
Control cableData cable
Clock cable
Control cable
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When commissioning a BTS
1. Test the input AC and DC power
2. Power on all the related switches.
DTMU,DCCU,DTRU,PSU,HEAT EXCHANGER,FAN, battery
3. Let the software for the cards to be downloaded.
4. Check if any alarms in DTMU,DDPU,DTRU. Communicate with
omc
5. Test the calls, gprs
6. Check the alarms (Mains failure, PSU Shut down, door open,
Temperature and humidity, water immersed)
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TROUBLE SHOOTING
.When we cannot establish a proper connection with the E1 (Look in to LIU)1. Make sure the patching was already finished
2. Ensure that the E1 is mapped to the correct port from the MUX and BSC.
3. Check weather bit errors exist.
4. If transformers are available, check the connections
5. Check the E1 connectors. Make sure they are correctly fixed.
6. Check the DTMU and dip switches are correctly set.
7. Replace the E1 cable.
8. Replace the DTMU.
E1 problem
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Check alarms
1. BTS3012AE AC arrester failure
2. PSU Shutdown
3. Door open alarms
4. Water immersed alarm
5. Check whether Temperature and humidity is indicated
6. Smog alarm (See whether LED is blinking)
If any alarm present, there will be Alarm indication of the DPMU
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Batteries not charging
1. Make sure all the switches are ON.
2. Check whether batteries are well charged enough.
3. Battery temperature sensor works properly.
4. Make sure PSU are in correct positions and remove PSU to
check whether backplane problem.
5. Make sure DPMU is normal. If not replace DPMU
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VSWR alarms
StepIf you have a SiteMaster in hand, t
hen …If you have no SiteMaster in
hand, then …
•1
•Use the SiteMaster to test the VSWR of the jumper at the VSWR function option side.•Check whether the tested VSWR is smaller than 1.5.•If yes, the antenna is faulty. Use the SiteMaster to check which part of the antenna is faulty (the joint between the jumper and the antenna connector is easily damaged). •If no, go to the Step 2.
•Interchange the two antennas.•If the alarm is cleared, the previous is damaged. •If you are sure that the antenna is damaged, check the connectors or replace the antenna. If the antenna is normal, go to Step 2.
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VSWR Alarm……
•2
•Replace the DDPU.•If the alarm is cleared, the detection circuit in the DDPU is faulty.If the alarm persists, the DDPU is normal. Go to Step 3.
•Replace the DDPU.•If the alarm is cleared, the detection circuit in the DDPU is faulty.•If the alarm persists, the DDPU is normal. Go to Step 3.
•3
•Replace the DTRU. •If the alarm is cleared, the detection circuit in the previous DTRU is faulty.
•Replace the DTRU. •If the alarm is cleared, the detection circuit in the previous DTRU is faulty.
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Cannot make calls even though site is on air
1. Make sure E1 is OK
2. DTMU,DTRU,DDPU power up.
3. Check the version of the DDPU and they must be same with
the omc
4. Check whether there are alarms in the DTRU,DDPU.
5. If the signals can be seen in MS, check whether the site was
defined in MSC
6. Reset the BTS.
7. Replace DTMU
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Noise or interference
1. Check the frequencies from omc.
2. Are there other GSM antennas in the tower.
3. Check whether the feeders are connected correctly (No
interchange)
4. Reset the site.
5. Check with RND
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Alarms not reported
Door alarm.
Check the NMPI connection of the door sensor.
Make sure the serial connection of the two door sensors.
Check if the connections of the door sensor is wrong.
Remove the cables from the door sensor and short circuit.
Remove the door sensor.
Power alarms.
1. Check the configurations are OK.
2. Check if the DPMU is faulty. (If no alarms reported)
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Common DDPU Problems
DDPU type mismatch
This alarm is present when the type of the DDPU is not the
same as the omc configuration. There fore check whether
DDPU type (P-GSM,E-GSM,RGSM)
CDU AFRCN Band mismatch
This also comes due to the above reason. The carrier
frequency must be matched with the DDPU type.
P-GSM uses 1-124, E-GSM uses 1-124 & 975-1023, R-GSM
uses 1-124 & 955-1023
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Functions and features of BTS3012AE
BTS3012AE hardware structure
Antenna and feeder system
Typical configuration
Troubleshooting cases
SummarySummary
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