gsm huawei bts3012 hardware structure

Download GSM HUAWEI BTS3012 Hardware Structure

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Hardware Structure of GSM Huawei BTS 3012 ,detailed presentation .

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1Upon 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.
PSTN ISDN PSPDN
Support networking topology includes star, tree, chain and ring
Support A5/1 and A5/2 encryption/decryption
Support GPRS and EDGE
Support the omni-directional coverage and directional coverage
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All rights reserved
Features and Functions
Double Transceiver Unit (DTRU). A single cabinet can support up to 12 carriers. It can smoothly evolve into WCDMA
Transmit diversity, 4-receive diversity
Support Power Boost Technology (PBT)
BTS3012 can share cabinet with WCDMA base station. The module of WCDMA base station can be inserted in the BTS3012 cabinet
Support more various transmission mode includes E1, STM-1, microwave, and satellite transmission
The DTRU of the BTS3012 can be inserted into BTS30/BTS312 with -48V DC power supply
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DCCU
DAFU
DDPU
DCOM
DATU
DMLC
DELC
DSAC
DCSU
DEMU
DCTB
FAN Box
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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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Provides data backup between the active and standby boards
Provides the 10 Mbit/s Ethernet port for maintenance
Supports four E1 inputs by default or eight E1 inputs if required
Controls, maintains, and operates the BTS
Downloads software for the BTS
Provides fault management, configuration management, performance management, and security management
Provides centralized clock distribution and management of the entire BTS, and the hot backup of the clock unit
Provides backup for the E1 ports and the main control unit
Provides eight digital alarm inputs, two of them being lightning arrester failure alarm inputs
Provides four extended digital control signal outputs
Monitors the external fan control board and the power modules
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LED
Color
Description
Status
Meaning
RUN
Green
Slow flash (on for 2s and off for 2s)
The OML is blocked.
Normal
Off
ACT
Green
Pull-in
Locked
LIU1
Green
Transmission status indicator of E1 port 1 or port 5
Off
On
E1 port 1 near end alarm occurs when SWT is off.
E1 port 5 near end alarm occurs when SWT is on.
Fast flash (on for 0.125s and off for 0.125s)
E1 port 1 remote end alarm occurs when SWT is off.
E1 port 5 remote end alarm occurs when SWT is on.
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LED
Color
Description
Status
Meaning
LIU2
Green
Transmission status indicator of E1 port 2 or port 6
Off
On
E1 port 2 near end alarm occurs when SWT is off.
E1 port 6 near end alarm occurs when SWT is on.
Fast flash (on for 0.125s and off for 0.125s)
E1 port 2 remote end alarm occurs when SWT is off.
E1 port 6 remote end alarm occurs when SWT is on.
LIU3
Green
Transmission status indicator of E1 port 3 or port 7
Off
On
E1 port 3 near end alarm occurs when SWT is off.
E1 port 7 near end alarm occurs when SWT is on.
Fast flash (on for 0.125s and off for 0.125s)
E1 port 3 remote end alarm occurs when SWT is off.
E1 port 7 remote end alarm occurs when SWT is on.
LIU4
Green
Transmission status indicator of E1 port 4 or port 8
Off
On
E1 port 4 near end alarm occurs when SWT is off.
E1 port 8 near end alarm occurs when SWT is on.
Fast flash (on for 0.125s and off for 0.125s)
E1 port 4 remote end alarm occurs when SWT is off.
E1 port 8 remote end alarm occurs when SWT is on.
SWT
Green
Indicates the transmission status of E1 links
When the DTMU supports eight E1 routes, the SWT status is slow flash (on for 10s and off for 10s).
When the SWT is off, LIU1 to LIU4 indicate the transmission status of E1 port 1 to 4.
When the SWT is on, LIU1 to LIU4 indicate the transmission status of E1 port 5 to 8.
When the DTMU supports four E1 routes, the SWT LED is always off.
LIU1 to LIU4 indicate the transmission status of E1 port 1 to 4.
ALM
Red
Port
Type
Function
T2M
SMA female connector
2 MHz reference clock, used to test and tune clock precision
FCLK
SMA female connector
13 MHz reference clock, used to test and tune clock precision
MMI
All rights reserved
Functions of DEMU
The DEMU guarantees the normal operation of the BTS by monitoring the surrounding environment.
The DEMU performs the following functions:
Monitors the environment information sent from the smoke sensor, water sensor, temperature and humidity sensor, infrared sensor, and door control sensor.
Collects alarm information and reports it to the DTMU.
Provides 6 Boolean value outputs and 32 Boolean value inputs.
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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. The DCSU is a mandatory board. Only one DCSU can be configured.
The DCSU performs the following functions:
Transmits clock signals, data signals, and control signals between the main cabinet and the extension cabinet.
Transmits the clock signals, data signals, and control signals from the DTMU to the DTRU ( for BTS3012) or QTRUs ( for 36TRXs).
Transmits the in-position signals of the DCOM, DDPU, or DFCU in the DAFU subrack to the DCMB. ( for BTS3012)
Transmits the in-position signals of the DDPU located in the DAFU subrack to the DCMB. ( for 36TRXs).
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Silk-Screen
Type
Description
CC_OUT
MD64 female connector
Connects with the cable for combined cabinets when the cabinet serves as the main cabinet and connects with the RF cable when the cabinet serves as the extension cabinet
CC_IN
MD64 female connector
Connects with the RF cable when the cabinet serves as the main cabinet and connects with the cable for combined cabinets when the cabinet serves as the extension cabinet
TO_DTRB
TOP2
DB26 female connector
Connects to the DCTB in the set-on-top subrack of the BTS3012 cabinet through cables
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DIP Switches
Remove the cable connected to the CC_IN of the DCSU of the Main cabinet and plug it to CC_OUT of the main cabinet
Connect the DCS cable to the DCF port of the TOP of two cabinets
SW2–SW5
All OFF
All rights reserved
Functions of DCCU
The DCCU is placed in slot 6 of the DCMB in the common subrack. The DCCU is a mandatory board. Only one DCCU can be configured.
The DCCU performs the following functions:
Transfers E1 signals.
Transfers the clock signals from the DAFU subrack.
Processes the power inputs through the EMI filter, and then transmits the power to the common subrack.
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Port
Type
Description
TRAN
TO_TOP1
MD64 female connector
Connecting to the DCTB in the set-on-top subrack of the BTS3012 through cables
POWER
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Functions of DATU
The DATU can be installed in slot 2, 3, 4, or 7 of the DCMB in the common subrack. The DATU is an optional board. A maximum of two DATUs can be configured.
The DATU performs the following functions:
Controls the RET antenna.
Reports alarms related to the control of the RET antenna.
Monitors the current from the feeder.
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Board
DATU
DCSU
DSAC (Signal Access Card for DTRU BTS)
D
M
L
C
D
E
L
C
D
E
L
C
D
S
A
C
DCF
CKB2
CKB1
All rights reserved
Functions of DMLC
The DMLC is configured in slot 0, 1, or 2 of the set-on-top subrack. The DMLC is an optional board, which is used with the DEMU. Only one DMLC is required in full configuration.
The DMLC performs the following functions:
Provides lightning protection for Boolean input and output signals.
Provides lightning protection for analog signals that are transmitted from the smoke sensor, water sensor, door control sensor, infrared sensor, humidity and temperature sensor.
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Functions of DELC
The DELC is configured in slot 0, 1, or 2 of the set-on-top subrack. These three slots are shared by the DELC and DMLC. The DELC is a mandatory board. At least one DELC should be configured.
The DELC provides lightning protection for 4 routes of E1 signals. A maximum of three DELCs can be configured to provide lightning protection for 12 routes of E1 signals.
The DELC performs the following functions:
Provides lighting protection for E1 signals.
Transmits E1 signals to the DCCU, through which the signals are sent to the DTMU for processing.
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Functions of DSAC
The DSAC is placed in slot 3 of the set-on-top subrack. The DSAC is a mandatory board. Only one DSAC is required in full configuration.
The DSAC performs the following functions:
Provides six Boolean alarm inputs.
Provides two CBUS3 signal outputs.
Provides two lightning protection arrester failure alarm inputs of the power supply.
Provides lightning protection for BITS clock signals.
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DTRU (Double Transceiver Unit)
Baseband Processing Part
Processes the signaling, such as coding, decoding, interleaving, de-interleaving, modulation, and demodulation.
Supports RF loop test and switchover when loop test of phase-lock fails.
Amplifies the output power.
Demodulates the RF signals into baseband signals, and performs frequency hopping.
Divides the received RF signals and performs receive diversity.
RF Receiving Part
Demodulates the RF signals into baseband signals, and performs frequency hopping.
Divides the received RF signals and performs receive diversity.
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Encryption
22.8kbit/s
Modulation
33.8kbit/s
Transmission
The radio channel is quite different from the wired channel. First, the radio channel has a distinct time-change characteristic. The radio channel is exposed to the air, so it is vulnerable to the interferences in the air. The signal is influenced by various interferences, multi-path fading and shadow fading, so the error bit ratio is rather high. To solve the problems mentioned above, a series of forward and backward(uplink & downlink) transmission techniques are applied. The original subscriber data or signaling data are transformed before being carried by the radio waves. And at the other end of the transmission, a reverse transforming will be done. This can provide necessary protection to the transmitting signal. The transformation methods roughly include the channel coding/decoding, interleaving/de-interleaving, burst formatting, encryption/decryption, and modulation/demodulation. For the voice, to pass an analog-to-digital converter is actually a sampling process in the rate of 8KHz,after quantification each 125μs contains 13bit of code stream; then speech coding is performed with every 20ms as a segment and the code transmission rate is reduced to 13Kbit/s, which becomes 22.8Kbit/s after the channel coding; then the voice becomes a code stream at 33.8kbit/s after code interleaving, encryption and burst formatting and is transmitted finally. The processing at the terminal is just the reverse of the above procedures.
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DTRU Power Amplifier Unit (DPAU)
DTRU Power Supply Unit (DTPS)
DTMU
DTPS
DTRU
Panels on DTRU (BTS3012 )
There are two types of DTRU: type A and type B. The four LEDs on the DTRU panel indicate the operating status of the DTRU and other functional subsystems.
DTRU (type A) has 10 ports and DTRU (type B) has 8 ports. These ports exchanges signals with the RF front-end subsystem.
DTRU panel (type A)
DTRU panel (type B)
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LED
Color
Description
Status
Remarks
RUN
Green
On
Off
There is no power supply or the module is faulty.
Slow flash (on for 2 s and off for 2 s)
The module is starting.
Slow flash (on for 1 s and off for 1 s)
The module works normally.
Fast flash (on for 0.2 s and off for 0.2 s)
The DTMU is issuing configuration data to the DTRU.
ACT
Green
On
The DTRU is operating. (The DTMU issuing configuration data normally and the cells starts) All the channels on the two TRXs operate normally.
Off
The communication between the DTRU and the DTMU is not established.
Slow flash (on for 1 s and off for 1 s)
A part of logical channels work normally (before and after TRX mutual aid).
ALM
Red
Off
Off
Normal
Slow flash (on for 1 s and off for 1 s)
There is a radio link alarm.
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Port
Type
Remarks
TX1
It is the output port for the signals from TRX1.
In transmit independency or transmit diversity mode, the TX port routes the signals to the TX port of the module in the RF front-end subrack.
In PBT or wideband combination mode, the TX1 port routes the signals to the IN1 port.
IN1
SMA female connector
In PBT or wideband combination mode, the IN1 port is short-circuited with the TX1 port.
TCOM
N female connector
In PBT or wideband combination mode, the TCOM port is used to output the combined signals from the IN1 and IN2 ports.
IN2
SMA female connector
In PBT or wideband combination mode, the IN2 port is short-circuited with the TX2 port.
TX2
It is the output port for the signals from TRX2.
In transmit independency or transmit diversity mode, the TX port routes the signals to the TX port of the module in the RF front-end subrack.
In PBT or wideband combination mode, the TX2 port routes the signals to the IN2 port.
RXM1
SMA female connector
In receive independency or receive diversity mode, it is the input port for the main RF signal.
In 4-way receive diversity mode, it is the input port for the diversity signal 1.
RXD1
SMA female connector
In receive independency or receive diversity mode, it is the input port for the diversity RF signal.
In 4-way receive diversity mode, it is the input port for the diversity signal 2.
RXM2
SMA female connector
In receive independency mode, it is the input port for the main RF signal.
In 4-way receive diversity mode, it is the input port for the diversity signal 3.
RXD2
SMA female connector
In receive independency mode, it is the input port for the diversity RF signal.
In 4-way receive diversity mode, it is the input port for the diversity signal 4.
PWR
Port
Type
Remarks
TX1
It is the output port for the signals from TRX1.
In transmit independency or transmit diversity mode, the TX port routes the signals to the TX port of the module in the RF front-end subrack.
In PBT or wideband combination mode, this port is suspended.
TCOM
N female connector
In PBT or wideband combination mode, the TCOM port is used to output the combined signals from the TX1 and TX2 ports.
TX2
It is the output port for the signals from TRX2.
In transmit independency or transmit diversity mode, the TX port routes the signals to the TX port of the module in the RF front-end subrack.
In PBT or wideband combination mode, this port is suspended.
RXM1
SMA female connector
In receive independency or receive diversity mode, it is the input port for the main RF signal.
In 4-way receive diversity mode, it is the input port for the diversity signal 1.
RXD1
SMA female connector
In receive independency or receive diversity mode, it is the input port for the diversity RF signal.
In 4-way receive diversity mode, it is the input port for the diversity signal 2.
RXM2
SMA female connector
In receive independency mode, it is the input port for the main RF signal.
In 4-way receive diversity mode, it is the input port for the diversity signal 3.
RXD2
SMA female connector
In receive independency mode, it is the input port for the diversity RF signal.
In 4-way receive diversity mode, it is the input port for the diversity signal 4.
PWR
TRX1
TRX0
TX
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
divider
combiner
divider
TRX0
TX
TRX1
TX
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combiner
divider
divider
TRX0
TX
TRX1
TX
divider
divider
TX1
IN1
TCOM
IN2
TX2
RXM1
RXD1
RXM2
RXD2
combiner
Functions of DTRB (BTS3012 )
The DTRB is placed in the DTRU subrack. The DTRB provides six slots to house the DTRUs.
The DTRB connects the DCSU with the DTRU.
The DTRB performs the following functions:
Provides bus connection between the common subsystem and the double-transceiver subsystem.
Specifies the slot number and rack number of the DTRU.
Transmits the in-position signals of the DTRUs to the DCSU.
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RF Front-End Subsystem (BTS3012 )
The functions of the BTS3012 RF front-end subsystem are performed by the boards in the DAFU subrack.
The DAFU subrack can be configured with the DDPU, DCOM, DFCU, DFCB, or the combination of these modules.
DDPU (Dual Duplexer Unit for DTRU BTS)
DCOM (Combining Unit for DTRU BTS)
DFCU (Filter Combiner Unit for DTRU BTS)
DFCB (Filter Combiner Unit for DTRU BTS)
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Functions of DDPU (BTS3012 )
The DDPU is configured in the DAFU subrack with the DCOM. The DDPU is an optional module. You can choose to configure DDPU or DFCU. Generally, three DDPUs are configured. If the DCOM is not configured, a maximum of six DDPUs can be configured.
The DDPU performs the following functions:
Provides lightning protection through the ANT port.
Detects VSWR alarms in the antenna system.
Receives the gain control signals for the low noise amplifier.
Transmits multiple routes of RF signals from the transmitter to the antenna.
Receives signals from the antenna, amplifies and quarters these signals, and then transmits them to the receiver of the DTRU.
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LED
Color
Description
Status
Meaning
RUN
Green
On
Off
There is no power supply or the module is faulty.
Slow flash (on for 1s and off for 1s)
The module works normally.
Fast flash (on for 0.2s and off for 0.2s)
The DTMU is issuing configuration data to the DDPU or the DDPU is loading software programs.
ALM
Red
Alarms (including VSWR alarm). This indicates that there are faults.
Off
VSWRA
Red
Slow flash (on for 1s and off for 1s)
There is a VSWR alarm with channel A.
On
Off
VSWRB
Red
Slow flash (on for 1s and off for 1s)
There is a VSWR alarm with channel B.
On
Off
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Port
Type
Description
COM
Receiving control signals, communication signals, and clock signals from the DCTB of the BTS3012
POWER
N female connector
It is the imput port for the signals received from the TX1 or TX2 port from the DTRU.
TXB
N female connector
It is the input port for the combined signals from the TCOM port of the DTRU.
It is the input port for the combined signals from the TX-COM port of the DCOM.
RXA1
SMA female connector
It is the output port for the main RF signal received from the ANTA port. It is connected to the RXM1, RXD1, RXM2, or RXD2 port on the DTRU panel.
RXA2
RXA3
RXA4
RXB1
SMA female connector
It is the output port for the diversity RF signal received from the ANTB port. It is connected to the RXM1, RXD1, RXM2, or RXD2 port on the DTRU panel.
RXB2
RXB3
RXB4
ANTA
Antenna port for reception and transmission
It is the input port for the RF signals received from the antenna.
ANTB
It is the output port for the RF signals transmitted from the TXA port of the DDPU.
It is connected to the indoor 1/2-inch jumper of the BTS3012 or to the Bias-Tee.
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Functions of the Fan Box
The fan box…