ome201102 huawei bts3012 hardware structure issue1.6
TRANSCRIPT
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www.huawei.com
Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
HUAWEI BTS3012
Hardware Structure
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Objectives
Upon completion of this course, you will be able to:
Know the functions and features of BTS
Master the BTS hardware structure
Master the cable connection of BTS
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Contents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
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Location
MS: Mobile Station BTS: Base Transceiver
Station
BSC: Base Station
ControllerHLR: Home LocationRegister
AUC: Authentication Center EIR: Equipment IdentityRegister
MSC: Mobile SwitchingCenter
VLR: Visitor LocationRegister
SMC: Short MessageCenter
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
MAP
TUP,ISUP
MS
MS
MS
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Features and Functions
Support GSM800M850M900M1800M1900M
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
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Contents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
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Hardware structure
TMA TMA
DTRU DAFU
Antenna and feeder
subsystemForepart of RF
Subsystem
TMA TMA
DTRU DAFU
TMA TMA
DTRU DAFU
Double transceiver
subsystem
DATU
Um Interface
DATU
fiber
E1
Abis Interface
Common subsystem
NFCB
Metro 100
DTMU
DEMU
E1
BITSMonitor
TBUS/DBUS/CBUS
MS
FH_BUS
Extension
cabinet
DBUS/TBUS
CBUS
CBUS3
CBUS3
CBUS3
CBUS3
CBUS2
CBUS2
CBUS2
CBUS3
CBUS3
Pro
tectionforsignal
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
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BTS3012 Cabinet and BoardsAbbreviations Description
DTRU Double Transceiver Unit
DTMU Transmission & Timing & Management Unit for DTRU BTS
DCCU Cable Connection Unit for DTRU BTS
DAFU Antenna Front-end Unit for DTRU BTS
DDPU Dual Duplexer Unit for DTRU BTS
DCOM Combining Unit for DTRU BTS
DATU Antenna and TMA Control Unit for DTRU BTS
DMLC Monitor Signal Lightning-Protection Card for DTRU BTS
DELC E1 Signal Lightning-Protection Card for DTRU BTS
DSAC Signal Access Card for DTRU BTS
DCSU Combined cabinet Signal connection Unit for DTRU BTS
DEMU Environment Monitoring Unit for DTRU BTS
DCTB Cabinet Top Backplane for DTRU BTS
FAN Box NodeB Fan Controlling and monitoring Board
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BTS3012 Cabinet and BoardsD D D D
Wiring & Air Inlet
Wiring
D
DPU
DCOM
DCOM
DDPU
DCOM
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
Wiring
FAN
Air Inlet
ML
C
Power and
E MC
Transmission Unit
DDPU
EL
C
EL
C
SA
C
Transmission Unit
DTM
U
DTM
U
DEM
U
D
C
CU
D
C
SU
D
A
TU
Double
transceiver
subsystem
Common
Subsystem
AntennaFront-Endof the RF Subsystem
(DAFU)
Cabinet Top Access
Subsystem (DCTB)
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BTS3012 Cabinet and BoardsD D D D
Wiring & Air Inlet
Wiring
D
DPU
DCOM
DCOM
DDPU
DCOM
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
Wiring
FAN
Air Inlet
ML
C
Power and
E MC
Transmission Unit
DDPU
EL
C
ELC
SAC
Transmission Unit
DTM
U
DTM
U
DEM
U
D
C
CU
D
C
SU
D
A
TU
Double
transceiver
subsystem
Common
Subsystem
AntennaFront-Endof the RF Subsystem
(DAFU)
Cabinet Top Access
Subsystem (DCTB)
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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
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Functions of DTMU
Providing the external GPS input, the BITS synchronized
clock input
Providing 4-route or 8-route E1 inputbackup 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
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Indicators on DTMU
RUN
ACT
PLL
LIU1
LIU2
LIU3
LIU4
SWT
ALM
RST
MMI
T2M
FCLK
T13M
DTMU
Indicato
r
Color Description Status Meaning
RUN Green Indicatesoperation
Slow flash (0.25 Hz) OML is blocked
Slow flash (0.5 Hz) Normal
Fast flash atuncertain intervals
BSC data loading
Off Power failure of the board
ACT Green Indicateswhether theboard is
active orstandby
Off Standby
On Active
PLL Green Indicates theclock status
Off Abnormal
On Free-run
Fast flash (4 Hz) Pull-in
Fast flash (1 Hz) Lock
LIU1 Green Indicates thetransmission
status of E1port 1 andport 5
Off E1 port 1 is normal when SWT is outE1 port 5 is normal when SWT is on
On E1 port 1 near end alarm occurs whenSWT is outE1 port 5 near end alarm occurs whenSWT is on
Fast flash (4 Hz) E1 port 1 remote end alarm occurswhen SWT is outE1 port 5 remote end alarm occurswhen SWT is on
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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 SignalConnection 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
DCMB
DTMU
DCSUDTRB
DCTB
DCCU
DEMU
DATU
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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 thecommon 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
Silk-
ScreenType Description
TRANMD64
(female)For E1 signal input
To_FAN DB26(female)
Connects to the fan panel throughcables
TO_TO
P1
MD64
(female)
Connects to the cabinet top
subrack through cables
POWER 3V3For 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 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 throughCBUS3 for control and alarm report
DATU
RUN
ACT
ALM
ANT0
ANT1
ANT2
ANT3
ANT4
ANT5
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BTS3012 Cabinet and BoardsD D D D
Wiring & Air Inlet
Wiring
D
DPU
DCOM
DCOM
DDPU
DCOM
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
Wiring
FAN
Air Inlet
MLC
Power andE MC
Transmission Unit
DDPU
ELC
ELC
SAC
Transmission Unit
DTM
U
DTM
U
DEM
U
D
C
CU
D
C
SU
D
A
TU
Double
transceiver
subsystem
Common
Subsystem
AntennaFront-Endof the RF Subsystem
(DAFU)
Cabinet Top Access
Subsystem (DCTB)
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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
ML
C
D
EL
C
D
EL
C
D
SA
C
D
CF
CKB2
CKB1
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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
COM1
EAC
SYNC
COM2
S1+S1-S2+S2-
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Double transceiver subsystem
DTRUDouble 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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DTRU transmit mode
No combining
Diversity transmitter
Power booster technology
Wide band combining
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DTRU receive mode
Independent receiver
Dividing receiver
Four diversity receiver
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Independent receiver
TRX1
TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
divider
combiner
divider
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Dividing receiver
TRX0
TX
TRX1
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combiner
divider
divider
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Four diversity receiver
TRX0
TX
TRX1
TX
divider
divider
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combiner
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BTS3012 Cabinet and BoardsD D D D
Wiring & Air Inlet
Wiring
D
DPU
DCOM
DCOM
DDPU
DCOM
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
D
TRU
Wiring
FAN
Air Inlet
MLC
Power andE MC
Transmission Unit
DDPU
ELC
ELC
SAC
Transmission Unit
DTM
U
DTM
U
DEM
U
DC
CU
DC
SU
DA
TU
Double
transceiver
subsystem
Common
Subsystem
AntennaFront-Endof the RF Subsystem
(DAFU)
Cabinet Top Access
Subsystem (DCTB)
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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
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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Interfaces on DCOM
Interface Type Description
ONSHE
LL
DB26
(female)
For indentification of the board type of
DCOM and on-site status
TX
COM
N (male) Output of combining signals from the DCOM
to DDPU
TX1 N (male) TX signal input from the DTRU to DCOM
TX2 N (male) TX signal input from the DTRU to DCOM
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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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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
D
D
P
U
Um
BSC
BTS3012 Cabinet
MSAntennaFeeder
Abis
D
T
R
U
DT
M
U
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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
UL Signal Flow
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UL Signal Flow
D
A
F
U
Um
BSC
BTS3012 Cabinet
MSAntennaFeeder
Abis
D
T
R
U
DT
M
U
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Signaling Processing Signal Flow
BTS3012
DDPUDTRUDTMU
BSCAbis
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Antenna BTS3012 antennas are classified:
By radiation features in horizontal directions: omnidirectional
antennas and directional antennas
By polarization features: single polarization antennas and dual
polarization antennas
Omnidirectional
antennaSingle polarization
antenna
Dual polarization
antenna
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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
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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
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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
Lower
noiseamplific-ation
Sending
filter
Receivingfilter
Bypass
DC
BTS
TMA
Feeder
Receivingfilter
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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
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Contents
1. Overview
2. System Components
3. Signal Processing
4. Antenna and Feeder System
5. Typical Configuration
C f
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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
group
The basic cabinet priority ruleTRXs are configured in the basic cabinet in preference, and the
number of TRXs in the basic cabinet is not less than that in any
extension cabinet
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Typical configuration S1/1/1
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Typical configuration S1/1/1
Diversity transmitter
S1/1/1 Diversity transmitter / Four
diversity receiver modeeach cell is
configured one DTRU and two DDPU
BSC data configuration should be
Diversity transmittermode
Four diversity receiver mode
Cabinet Top powerdBm
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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S
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Summary
Functions and features of BTS3012
BTS3012 hardware structure
Antenna and feeder system
Typical configuration
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