© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
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
ObjectivesObjectives
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
ContentsContents
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
LocationLocation
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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Features and FunctionsFeatures and Functions
Support GSM900M 、 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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Features and FunctionsFeatures 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)
Support more various transmission mode includes E1, STM-1,
microwave, and satellite transmission
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
ContentsContents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Hardware structureHardware 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
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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
BTS3012 Cabinet and BoardsBTS3012 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)
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
BTS3012 Cabinet and BoardsBTS3012 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)
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Structure of DTMUStructure 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 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-inFast 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
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Indicators on DTMUIndicators on DTMU
RUN
ACT
PLL
LIU1
LIU2
LIU3
LIU4
SWT
ALM
RST
MMI
T2M
FCLK
T13M
DTMU
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
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Functions of DEMUFunctions 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
Output of 6-route Boolean value and input of 32-route main node
alarms
DMLC DEMUCBUS3Monitor signal
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Functions of DCSUFunctions 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
DCSUDTRB
DCTB
DCCU
DEMU
DATU
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Functions of DCCUFunctions 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
DCMB
DTMU
DCCUNFCB
DCTB
DCSU
DEMU
DATU
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The interfaces on the DCCU panel The interfaces on the DCCU panel
Silk-Screen
Type Description
TRANMD64 (female)
For E1 signal input
To_FANDB26 (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
POWER
DCCU
To_FAN
TO_TOP1
TRAN
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Functions of DATUFunctions 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
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BTS3012 Cabinet and BoardsBTS3012 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)
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Cabinet Top Access SubsystemCabinet 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 DMLCFunction 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
Smoke/water/access control/infrared/humidity/temperature sensor signal input
SWIN
SWOUT
DMLC
AIN
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Function of DELCFunction 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
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Function of DSACFunction 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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BTS3012 Cabinet and BoardsBTS3012 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)
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Double transceiver subsystem Double transceiver subsystem
DTRU ( Double Transceiver Unit) DTRB
DTRB
DTRU
DTRU
DTRU
DTRU
DTRU
DTRU
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Functions of DTRUFunctions of DTRU
RF subsystem transmit part. RF subsystem receive
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Functional structure of DTRU 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 DTRUIndicators 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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Interfac
e
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
Connectors on DTRU
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DTRU transmit modeDTRU transmit mode
No combining Diversity transmitter Power booster technology Wide band combining
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No combiningNo combining
TCOM
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
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Diversity transmitterDiversity transmitter
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
Man made multi way
combinercombiner
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Power booster technologyPower booster technology
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
Same phase
combinercombiner
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Wide band combiningWide band combining
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
combinercombiner
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DTRU receive modeDTRU receive mode
Independent receiver Dividing receiver Four diversity receiver
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Independent receiverIndependent receiver
TRX1TRX1
TRX0TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
dividerdivider
combinercombiner
dividerdivider
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Dividing receiverDividing receiver
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
dividerdivider
dividerdivider
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Four diversity receiverFour diversity receiver
TRX0TRX0
TX
TRX1TRX1
TXdividerdivider
dividerdivider
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
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Intra structure of DTRUIntra structure of DTRU
TRX0TRX0
TX
TRX1TRX1
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combinercombiner
dividerdivider
dividerdivider
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Functions of DTRBFunctions 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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BTS3012 Cabinet and BoardsBTS3012 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)
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Front-End of the RF SubsystemFront-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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Functions of DDPUFunctions 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
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Functional structure of the DDPU Functional structure of the DDPU
ANTB
TXA
TXB
RXA4
duplexerduplexer dividerdivider duplexerduplexer dividerdivider
ANTA
RXA1RXA2RXA3
RXB1RXB2RXB3RXB4
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Functions of DCOMFunctions 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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ContentsContents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
System Signal FlowSystem Signal Flow
the signal flow of the service and signaling include DL Signal Flow UL Signal Flow Signaling Processing Signal Flow Clock Signal Flow
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DL Signal FlowDL Signal Flow
DDPU
Um
BSC
BTS3012 Cabinet
MSAntennaFeeder
Abis
DTRU
DTMU
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DL Signal FlowDL 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 UL Signal Flow
DAFU
Um
BSC
BTS3012 Cabinet
MSAntennaFeeder
Abis
DTRU
DTMU
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UL Signal Flow 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
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Signaling Processing Signal FlowSignaling Processing Signal Flow
BTS3012
DDPUDTRUDTMU
BSCAbis
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Signaling Processing Signal FlowSignaling 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
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Clock Signal FlowClock Signal Flow
DTMUBoards in main
cabinet
Boards in slavecabinet
A-bis
Clock distributioncable between
cabinets
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Clock Signal Flow DescriptionClock 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
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ContentsContents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Antenna Feeder subsystem Antenna Feeder subsystem
Antenna
TMA
Antennasupport
Jumper
JumperFeeder
Jumper
AntennaFeederJumpers
TMA
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AntennaAntenna
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
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Lightning ArresterLightning Arrester
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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Antenna PatternAntenna 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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
PolarizationPolarization
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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
ContentsContents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Configuration PrinciplesConfiguration Principles
The configuration principles of the BTS3012 cabinet are as follows: The minimum antenna rule
The minimum cabinet rule
The complete synchronous cell rule
The basic cabinet priority rule
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Typical configuration S1/1/1Typical configuration S1/1/1(( Diversity transmitterDiversity 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
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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Typical configurationS2/2/2Typical configurationS2/2/2(( No combining modeNo 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
slide BSC data configuration should be
No combining mode Dividing receiver mode
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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Combined Cabinet Signal CablesCombined 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
© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET
Thank YouThank You
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