bts 3012 analyze.docx
TRANSCRIPT
HUAWEI BTS 3012 Features and Functions: o Support GSM 800M、850M、900M、1800M、1900M o Support networking topology includes star, tree, chain and ring o Support A5/1 and A5/2 encryption/decryptiono Support GPRS and EDGEo Support dynamic and static power controlo Support the omni-directional coverage and directional coverageo Double Transceiver Unit (DTRU). A single cabinet can support up to 12 carriers. It can
smoothly evolve into WCDMAo Transmit diversity, 4-receive diversity o Support Power Boost Technology (PBT) o BTS3012 can share cabinet with WCDMA base station. The module of WCDMA base
station can be inserted in the BTS3012 cabinet o Support more various transmission mode includes E1, STM-1, microwave, and
satellite transmission o The DTRU of the BTS3012 can be inserted into BTS30/BTS312 with -48V DC power
supply
Cabinet and Boards:
D 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
common
DTRU
DAFU
Hardware structure:
Common Subsystem: o DTMU Transmission timing& management unit for DTRU BTSo DEMU Environment Monitoring Unit for DTRU BTSo DCSU Combined cabinet Signal connection Unit for DTRU BTSo DCCU Cable Connection Unit for DTRU BTSo DATU Antenna and TMA control unit for DTRU BTS
TMATMA
DTRU DAFU
Antenna and feeder subsystem
Forepart of RFSubsystem
TMA TMA
DTRU DAFU
TMATMA
DTRU DAFU
Double transceiver subsystem
DATU
Um Interface
DATU
fiber
E1
Abis Interface
DELC
Common subsystem
NFCB
Metro 100
DTMU
DEMU
E1
BITSMonitor TBUS/DBUS/CBUS
MS
FH_BUS
Extension cabinet
BTS 3012 - Diagram
DTMU:o Providing the external GPS input, the BITS synchronized clock inputo Providing 4-route or 8-route E1 input,backup between the active and standby
boardso Providing local MMI maintenance of the 10 M network porto Controlling, maintaining, and operating the BTSo Providing fault management, configuration management, performance management,
and security managemento Supporting 8-route digital alarm input. Two routes are lightning arrester failure alarm
detection Structure:
Indicators: 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 out E1 port 5 near end alarm occurs when SWT is on
Fast flash (4 Hz) E1 port 1 remote end alarm occurs when SWT is out E1 port 5 remote end alarm occurs when SWT is on
Indicator Color Description Status Meaning
MCK
OMLDBUS
CBUS
Clock
BIU DTRU
DTMU
BSC
MCUMMILMT
Abis
Externalsynchronizedclock
RUN
ACT
PLL
LIU1
LIU2
LIU3
LIU4
SWT
ALM
RST
MMI
T2M
FCLK
T13M
DTMU
LIU2 Green
Indicates the transmission status of E1 port 2 and port 6
Off E1 port 2 is normal when SWT is out E1 port 6 is normal when SWT is on
On E1 port 2 near end alarm occurs when SWT is out E1 port 6 near end alarm occurs when SWT is on
Fast flash (4 Hz) E1 port 2 remote end alarm occurs when SWT is out E1 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 out E1 port 7 is normal when SWT is on
On E1 port 3 near end alarm occurs when SWT is out E1 port 7 near end alarm occurs when SWT is on
Fast flash (4 Hz) E1 port 3 remote end alarm occurs when SWT is out E1 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 out E1 port 8 is normal when SWT is on
On E1 port 4 near end alarm occurs when SWT is out E1 port 8 near end alarm occurs when SWT is on
Fast flash (4 Hz) E1 port 4 remote end alarm occurs when SWT is out E1 port 8 remote end alarm occurs when SWT is on
SWT GreenIndicates 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
DEMU:
DCSU:
CC_IN
CC_OUT
TO_DTRB
TOP2
DCSU
o Interfaces:
The DEMU is placed in slots 2 to 4 and slot 7 of the common subrack with the DATU. The DEMU is an optional module. There is maximum one DEMU under full configuration.
Monitoring variations in the smoke, water, temperature, humidity, infrared, and access control ,Handling alarms
Guaranteeing normal operation of the equipment
DMLC DEMUCBUSMonitor signal
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
DCCU:
POWER
DCCU
To_FAN
TO_TOP1
TRAN
o Interfaces:
Silk-Screen Type Description
TRAN MD64 (female) For E1 signal input
To_FAN DB26 (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
DATU: o The DATU is placed in slots 2 to 4 and slot 7 of the common subracko with the DEMU. It is optional and there are maximum two DATUso Transmitting the remote electrical tilt unit (RET) control signals
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
DATU
RUN
ACT
ALM
ANT0
ANT1
ANT2
ANT3
ANT4
ANT5
o Feeding the TMAo Communicating with the DTMU through CBUS for control and alarm report
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)
DMLC: o 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 DMLCo Smoke/water/access control/infrared/humidity/temperature sensor signal input
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
DSAC: The DSAC is placed in slot 3 of the cabinet top subrack. There is only one DSAC and it
is mandatory Two-route input of lightning protection arrester failure alarm Access protection of BITS clock input
D
M
L
C
D
E
L
C
D
E
L
C
D
S
A
C
DC
F
CK
B2
CK
B1
DSAC
CO
M1
EA
CS
YN
CC
OM
2S
1+
S1
-S2
+S
2-
SWIN
SWOUT
DMLC
AIN
DELC
TR
Double transceiver subsystem: DTRB >>> Backplane DTRU(Double Transceiver Unit)
DTRB: o The DTRB is placed in the DTRU subrack. It has six slots, each holding one DTRU o The DTRB provides connections between the DCSU and the DTRU. All the onsite
signals are provided to the DCSU through the DTRB
DTRU :
DTRU
TX1
IN1
TCOM
IN2
TX2
RST
RUN
ACT
ALM
RF_IND
PWR
RXM1
RXD1
RXM2
RXD2
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 RedIndicates 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
DTRB
DTRUDTRUDTRUDTRUDTRUDTRU
Front-End of the RF Subsystem: DDPU (Dual Duplexer Unit for DTRU BTS) DCOM (Combining Unit for DTRU BTS)
DDPU: o 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
o Sending multi RF signals from the transceiver in the DTRU to the antenna through the duplexer,(DL)o Sending signals from the antenna after amplifying them to the transceiver in the DTRU, (UL)o Detecting standing wave alarms in the Antenna Feeder system
RUNALM
VSWRA
RXA1
RXA2
RXA3
RXA4
RXB1
RXB2
RXB3
RXB4
DDPU
TXA
TXB
COM
POWER
VSWRB
ANTAANTB
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
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 (4 carriers)
Interface Type Description
ONSHELL 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
FAN BOX: The FAN BOX forms a loop with the air inlet box to provide forced ventilation and
dissipation for the common subrack, the DTRU subrack, and the DAFU subrack The FAN Box is mandatory with four independent axial flow fans. The fans' speed and
running status are controlled by the Fan Controlling and Monitoring Board
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 upgraded
Green or red or orange
Off There is no power supply and the board is faulty
FANSTATE
COMPWR
DCOM
TX-COM
TX2
TX1
ONSHELL
System Signal Flow: o DL Signal Flow Steps:
The DTMU receives the service data from the BSC, exchanges and processes it, and then transfers it to the DTRUThe DTRU performs digital filtering, up conversion, and filter amplification of the signals and sends the signals to the DDPUThe duplexer in the DDPU filters the signals sent from the DTRU and transmits the signals through antennas and feeders
o UL Signal Flow 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 portThe DDPU receives the signals and transmits the signals to the DTRU after they are filtered by the duplexer and amplified by the LNAThe 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
DL Signal Flow
DDPU
Um
BSCBTS3012 Cabinet
MSAntennaFeeder
Abis
DTRU
DTMU
UL Signal Flow
DAFU
Um
BSCBTS3012 Cabinet
MSAntennaFeeder
Abis
DTRU
DTMU
Antenna Feeder subsystem: Types of Main Feeder:
o 7/8 inch Cable loss=0.043dB/m
o 5/4 inch Cable loss=0.032dB/m
o 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
Antenna: In mobile communications systems, the antenna consists of an array of element antennas,
Element antenna
Feeding network
Antenna connector
Directional antenna Omnidirectional antenna
Feeding network
Element antenna
Feeding network
Antenna connector
o 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
BTS3012
DDPUDTRUDTMUBSC Abis
Antenna
TMA
Antennasupport
Jumper
JumperFeeder
Jumper
Omnidirectional antenna
Single polarization antenna
Dual polarization antenna
BTS 3012 Configurations
1 2
Typical configuration S1/1/1( transmit independence mode)
S1/1/1 transmit independence mode, Each cell is configured one DTRU and one DDPU.
The connection for one cell is showed in the right slide
BSC data configuration should be :transmit independence mode , receive independence mode
DDPU
TX BRXB1
RXA1RXA2RXA3RXA4
RXB2RXB3RXB4
TX A
DTRU
TX 1
TCOM
RXM 1
RXM 2RXD 1
RXD 2
TX 2IN2
IN 1
Typical configuration S1/1/1( transmit diversity+4-way receive diversity)
S1/1/1 transmit diversity+4-way receive mode, each cell is configured one DTRU and two DDPU
BSC data configuration should be : transmit diversity mode
4-way receive mode
DTRU
DDPU
TX BRXB1
RXA1RXA2RXA3RXA4
RXB2RXB3RXB4
TX A
DDPU
TX BRXB1
RXA1RXA2RXA3RXA4
RXB2RXB3RXB4
TX A
TX 1
TCOM
RXM 1
RXM 2RXD 1
RXD 2
TX 2IN2
IN 1
3 4
Typical configurationS2/2/2( transmit independence mode)
S2/2/2 transmit independence mode, Each cell is configured one DTRU and one DDPU
The connection for one cell is showed in the right slide
BSC data configuration should be : transmit independence mode , receive diversity mode
DDPU
TX BRXB1
RXA1RXA2RXA3RXA4
RXB2RXB3RXB4
TX A
DTRU
TX 1
TCOM
RXM 1
RXM 2RXD 1
RXD 2
TX 2IN2
IN 1
Typical configurationS2/2/2( PBT mode )S2/2/2 PBT
mode, each cell is configured two DTRU and one DDPU
The connection for one cell is showed in the right slide
BSC data configuration should be :PBT mode
receive independence mode
DDPU
TX BRXB1
RXA1RXA2RXA3RXA4
RXB2RXB3RXB4
TX A
DTRU
TX 1
TCOM
RXM 1
RXM 2RXD 1
RXD 2
TX 2
IN2
IN 1
DTRU
TX 1
TCOM
RXM 1
RXM 2RXD 1
RXD 2
TX 2
IN2
IN 1
5 6
7 8
S4/4/4 wideband transmit combination mode , each cell is configured two DTRU and one DDPU
BSC data configuration should be :wideband transmit combination mode , receive diversity mode
S1/2/1,cell1 and cell 3 need share one DTRU, cell 2 need configure one DTRU and one DDPU.
BSC data configuration should be : DTRU1:
transmit independence mode, receive independence mode ;DTRU2:transmit independence mode , receive independence diversity mode
Typical configuration S8/8/8S8/8/8 cell 1 and cell 3 are configured 4 DTRU,2 DCOM and 1 DDPU
BSC data configuration should be :wideband transmit combination mode , receive diversity mode
DTRU
TX 1
TCOM
TX 2IN2
IN 1
TX 2
TX1
DTRU
TX 1
TCOM
TX 2IN2
IN 1
Tx-com
DTRU
TX 1
TCOM
TX 2IN2
IN 1
DDPU
TX BRXB1
RXA1RXA2RXA3RXA4RXB2RXB3RXB4
TX A
TX 2
TX1
DTRU
TX 1
TCOM
TX 2IN2
IN 1
Tx-com
Typical configuration S8/8/8S8/8/8
cell2 is configured 4 DTRU,2 DCOM and 2 DDPU, cell 2 need cross the cabinet
BSC data configuration should be:wideband transmit combination mode , receive diversity mode
Attention: only support frequency hopping
DTRU
TX 1
TCOM
TX 2IN2
IN 1
DDPU
TX BRXB1
RXA1RXA2RXA3RXA4RXB2RXB3RXB4
TX A
TX 2
TX1
DTRU
TX 1
TCOM
TX 2IN2
IN 1
Tx-com
RF-EX1RF-EX2RF-EX3RF-EX4
DTRU
TX 1
TCOM
TX 2IN2
IN 1
DDPU
TX BRXB1
RXA1RXA2RXA3RXA4RXB2RXB3RXB4
TX A
TX 2
TX1
DTRU
TX 1
TCOM
TX 2IN2
IN 1
Tx-com
RF-EX1RF-EX2RF-EX3RF-EX4