Huawei BTS 3900 Hardware Structure

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Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved.
HUAWEI BTS3900
Hardware Structure

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Chapter 1
Chapter 1 BTS3900
BTS3900 Product Description
Product Description
Chapter 2 BTS3900 System Structure

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BTS3900 Product Description
u The BTS3900 is comprised of the BBU3900, MRFU, and indoor macro cabinet. The
BBU3900 and the MRFU are installed in the indoor macro cabinet. The PS4890 meets the
requirements of different applications when the backup power or transmission equipment
space is required.
BTS3900 system structure PS4890 system structure

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Features of BTS3900
u Advanced Platform-Based Architecture
Ø Based on the unified hardware platform, the BTS3900 supports three working modes: GSM
mode, GSM+UMTS dual mode, and UMTS mode through configuration of different software.
In addition, the BTS3900 supports smooth evolution to the Long-Term Evolution (LTE).
Ø The RF module integrates the duplexer and the Transceiver Unit (TRU), thus enhancing
integrity of RF parts and meeting future requirements for a compact, high-efficiency, and low-
cost base station.
Ø Supports whole frequency band of PGSM 900MHz, high 45MHz frequency band and low
45MHz frequency band of DCS1800MHz, high 40MHz frequency band and low 40MHz
frequency band of 1900MHz.
u High Capacity
Ø When the BTS3900 works in GSM mode, a BBU3900 supports the maximum cell configuration
of S24/24/24.
Ø When the BTS3900 works in GSM+UMTS dual mode, a BBU3900 supports the maximum cell
configuration of GSM S4/4/4 + UMTS S2/2/2 or GSM S5/5/5 + UMTS S1/1/1.
Ø When the BTS3900 works in UMTS mode, a BBU3900 supports 24 cells, 1,536 CEs in the
uplink, 1,536 CEs in the downlink, and the maximum configuration of 3 x 8.

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Features of BTS3900
u Transmission Sharing
Ø Sharing the CPRI port. The CPRI data of the GSM and UMTS networks can be multiplexed on
the same optical cable, which reduces the quantity of CPRI ports.
Ø Supports co-transmission between the GSM and the UMTS. Sharing transmission resources
between the Abis and the Iub interfaces.
u Flexible Clock Synchronization Modes
Ø Upper synchronization clock, extract clock from Abis/Iub interface.
Ø Extract clock from GPS (Global Positioning System).
Ø Synchronization with the IP clock, a highly cost-effective clock solution, which can be obtained
through software upgrade without additional hardware.
Ø Clock phase lock, tracing, and memory functions and free-run synchronization mode. When the
clock operates in free-run mode, the system can keep operational for at least 90 days at normal
temperature.

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Features of BTS3900
u Networking Capability
Ø The BTS3900 supports multiple network topologies, such as star, tree, chain, and ring
topologies.
Ø Supports Flex Abis networking.
Ø When working in UMTS mode, the BTS3900 supports ATM and IP dual stack to protect
operators' early investment in ATM transport.
Ø Supports optimized transmission on the Abis interface.
u Low Power Consumption

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Chapter 1 BTS3900 Product Description

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Abbreviation
Description
Abbreviation
WCDMA Main Processing and Transmission Unit
WMPT
WCDMA Baseband Process unit Type A
WBBPa
Universal Transmission Processing Unit
UTRP
The Heat Exchange Unit Type A
HEUA
Universal FE/GE Lighting Protection unit
UFLP
Common Protocol Radio Interface
CPRI
Advanced Power Module
APM30H
Universal E1/T1 Lighting Protection unit
UELP
Universal Environment Interface unit
UEIU
HPMI
UBFA
BSBC
UPEA
GTMU
The Hert Power Monitoring Interface unit
Universal BBU Fan Unit Type A (2U)
Universal BBU Subrack Backplane Type C (2U)
Universal power and Environment interface unit
Type A (-48v)
Transmission& Timing& Management Unit for BBU

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Hardware Structure of the BTS3900
Typical configuration of the BTS3900 cabinet (-48V)
u Hardware Structure of the BTS3900 (-48V)
Ø The BTS3900 cabinet (-48V) uses the external -48V DC input. The DC power is directly led
into the DCDU-01 and the DCDU-01 distributes the DC power to each component in the
cabinet.
Ø The BTS3900 cabinet (-48V) consists of the following components: the MRFUs,
BBU,DCDU-01, and FAN unit. You can optionally install devices of 3U in height in the spare
space of the cabinet.

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BBU3900 Equipment
u The BBU3900, which features a case structure, can be installed in a 19-inch-wide
and 2U-high indoor space or outdoor protective cabinet.
u BBU3900 equipment includes:
Ø GTMU
Ø WMPT
Ø WBBP
Ø UTRP
Ø UPEU
Ø UEIU
Ø UELP
Ø UFLP
Ø UBFA

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Functions of the BBU3900
u As the baseband processing unit, the BBU3900 provides ports for connection
between the dual mode base station and the BSC/RNC and between the BBU3900
and the RF modules.
u The BBU3900 has the following functions:
Ø Provides ports for communication between the base station and the BSC/RNC.
Ø Provides CPRI ports for communication between the BBU and the RF modules.
Ø Provides USB ports, facilitating the automatic software upgrade of the dual-mode base
station when a USB disk is inserted during software installation and data configuration.
Ø Provides an OM channel between the base station and the LMT or the M2000 to operate
and maintain the base station.
Ø Processes uplink and downlink data.
Ø Manages the entire dual-mode system in terms of OM and signaling processing.
Ø Provides the system clock.

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BBU3900 Slots
u The slots of the BBU3900 GSM, BBU3900 GU, and BBU3900 UMTS are the same.

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Board configuration principles of the BBU3900 GU
Only configuredin slot 5 and slot6
Slot 5 and slot 6
1
Mandatory
GTMU
Preferentially configured in slot 4
Slot 0 or slot 4
2
Optional
UFLP
-
PWR1
1
Optional
UEIU
In the case of less than or equal to four E1s, one UELP is required and
installed in slot 4. In the case of more than four but less than or equal to
eight E1s, two UELPs are required and installed in slot 0 and slot 4. In the
case of more than eight E1s, the SLPU is required and the UELPs are
installed in the SLPU.
Slot 0 or slot 4
2
Optional
UELP
——
Slot 0 － Slot 4
4
Optional
UTRP
Preferentially configured in the PWR2 slot in the case of a single UPEU
PWR1 o PWR2
2
Mandatory
UPEU
Only configured in the FAN slot
FAN
1
Mandatory
UBFA
Only configured in slot 2 and slot 3 in the case of the WBBP that transmits
CPRI Signals
Slot 0 － Slot 3
4
Mandatory
WBBP
Preferentially configured in slot 7 in the case of a single WMPT
Slot 7
1
Mandatory
WMPT
Configuration Limitations
Slot
Maximum
Number
Optional/
Mandatory
Board
Name
Typical configuration of the BBU3900 GU

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BBU Hardware – GTMU Board
u The GSM Transmission, Timing, and Management Unit for BBU (GTMU) controls
and manages the entire BTS in GSM mode. It provides interfaces related to the
reference clock, power monitoring, OM, and external alarm collection.
u Functions:
Ø Controlling, maintaining, and operating the BTS. Providing fault management,
configuration management, performance management, and security management.
Ø Monitoring the fan module and the power supply module.
Ø Providing four routes of E1 transmission.
Ø Providing CPRI ports for the communication with the RF modules.
Ø Distributing and managing BTS clock signals.
Ø Providing the Ethernet port for local maintenance.
Ø Providing clock output for testing.

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GTMU
Board
Provides the input and output of the four E1/T1 signals
between the GTMU and the UELP or between the GTMU
and the BSC.
DB26 female
E1/T1
Provides a reference clock for the tester.
USB
TST
Enables the automatic software upgrade from a USB disk.
USB
USB
Connects the BBU to a routing device in the equipment
room through the optical cable to transmit network
information.
DLC
FE1
Connects the BBU to a routing device in the equipment
room through the Ethernet cable to transmit network
information.
RJ45
FE0
Port for local maintenance and commissioning
RJ45
ETH
Ports for the communication between the BBU and the RF
module; support input and output of the optical and
electrical signal.
SPF
CPRI0～
CPRI5
Description
Connector Type
Port
u Ports on the GTMU panel:

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u DIP Switches:
The T1 impedance is set to 100 ohms.
OFF
ON
The E1 impedance is set to 120 ohms.
ON
OFF
The E1 impedance is set to 75 ohms.
ON
ON
SW1
2
1
Description
DIP Status
DIP Switch
All the DIP bits of S2 are set to OFF (balanced
mode) by default in all modes.
OFF
OFF
OFF
OFF
When four 75- ohm E1 links are faulty, all the
DIP bits of S2 should be set to ON
(unbalanced mode) so that the Faults are rectified.
ON
ON
ON
ON
SW2
4
3
2
1
Description
DIP Status
DIP Switch

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BBU Hardware – WMPT Board
u This describes the WCDMA Main Processing and Transmission unit (WMPT). It
is the BBU3900 main control and transmission board that processes the
signals and manages the resources for other boards.
u The WMPT has the following functions:
Ø Providing Operation and Maintenance (OM) functions such as configuration
management, equipment management, performance monitoring, signaling
processing, and active/standby switchover and providing OM channels connected to
the OMC (LMT or M2000).
Ø Providing the reference clock.
Ø Processing signaling and managing resources for other boards in the BBU.
Ø Providing USB ports, one of which facilitates automatic base station upgraded when a
USB disk is inserted during software installation and data configuration.
Ø Providing four E1s/T1s which support ATM and IP protocols.
Ø Providing one FE electrical port and one FE optical port which support the IP protocol.

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USB testing port
USB connector
TEST
WMPT
Board
Resetting the BBU
—
RST
USB loading port
USB connector
USB
Commissioning Ethernet port
RJ45 connector
ETH
GPS antenna
SMA connector
GPS
FE optical port
SFP connector
FE1
FE electrical port
RJ45 connector
FE0
E1
DB26 connector
E1/T1
Description
Connector Type
Port
u Ports on the WMPT:

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u DIP switches on the WMPT:
SW1
DIP switch
OFF
OFF
ON
ON
T1 Mode
ON
ON
3
ON
ON
4
ON
OFF
2
ON
OFF
1
120-ohm E1 Mode 75-ohm E1 Mode
DIP Bit
Unbalanced Mode
Balanced Mode
DIP Bit
DIP switch
SW2
OFF
OFF
OFF
OFF
ON
3
ON
4
ON
2
ON
1

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BBU Hardware – WBBP Board
u This describes the WCDMA Baseband Process Unit (WBBP) board. It is a
mandatory board of the BBU3900 that processes baseband signals.
u The WBBP has the following functions:
Ø Provides the CPRI ports for communication between the BBU and the RFU, and supporting
CPRI ports in 1+1 backup mode.
Ø Processes uplink and downlink baseband signals.
u There’re two types of WBBP board: WBBPa and WBBPb.

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BBU Hardware – WBBP Board
u Specifications of the WBBPs:
Number of DL CEs
Number of UL CEs
Number of Cells
Board
256
128
3
WBBPa
64
64
3
WBBPb1
128
128
3
WBBPb2
256
256
6
WBBPb3
384
384
6
WBBPb4

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BBU Hardware – UPEU Board
u This describes the Universal Power and Environment Interface Unit
(UPEU) board. It is a mandatory board of the BBU3900 that converts -48 V
or +24 V DC to +12 V DC.
u The UPEU has the following functions:
Ø Converting -48 V or +24 V DC to +12 V DC that is applicable to the boards.
Ø Providing two ports with each transmitting one RS485 signal and another two
ports with each transmitting four dry contact signals.
Ø Providing reverse connection protection for power cable connectors.
u The UPEU is classified into the Universal Power and Environment
Interface Unit Type A (UPEA) and the Universal Power and Environment
Interface Unit Type B (UPEB). The UPEA converts -48 V DC to +12 V DC
and the UPEB converts 24 V DC to 12 V DC.

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BBU Hardware – UELP Board
u The Universal E1/T1 Lightning Protection (UELP) is a universal E1/T1 surge
protection unit. The UELP is optionally installed in the SLPU or BBU. Each
UELP provides surge protection for four E1s/T1s.
E1 transmission port
DB26
OUTSIDE
E1 transfer transmission port
DB25
INSIDE
Description
Connector Type
Port
120-ohm E1 cable or 100-ohm T1 cable
OFF
OFF
OFF
OFF
75-ohm E1 cable
ON
ON
ON
ON
S1
4
3
2
1
Description
DIP Status
DIP Switch
u The UELP has one DIP switch, which is used to select whether the receive
terminal is grounded.

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BBU Hardware – UFLP Board
u The universal FE lightning protection (UFLP) board is optionally installed in
the SLPU or BBU3900. Each UFLP supports 2-way FE surge protection.
RJ45
2
FE0、FE1
OUTSIDE
RJ45
2
FE0、FE1
INSIDE
Connector Type
Quantity
Port
Port Location

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BBU Hardware – UTRP Board
u This describes the Universal Transmission Processing unit (UTRP) board. It is
a transmission extension board of the BBU3900 and provides eight E1s/T1s
and one unchannelized STM-1/OC-3.
u The UTRP has the following functions:
Ø Providing extension Iub transmission ports which support eight E1s/T1s and one
unchannelized STM-1/OC-3.
Ø Supporting ATM and IP transport.
Ø Supporting cold backup.

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BBU Hardware – UTRP Board
u The panel of the UTRP configured with the UAEU or UIEU is different from
that of the UTRP configured with the UUAS.
u The UTRP can be configured with different sub-boards to support different ports.
Panel of the UTRP (with 2 FE/GEs)

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BBU Hardware – UBFA Module
u This describes the Universal BBU Fan Unit Type A (UBFA) module of the
BBU3900. The UBFA controls the fan speed and detects the temperature of
the fan board.
The module is not
registered, and no
alarm is reported.
0.125s ON, 0.125s OFF
The module is
reporting alarms.
1s ON, 1s OFF
No alarm is reported.
OFF
Red
The module is
running properly.
1s ON, 1s OFF
Green
STATE
Description
Status
Color
LED

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BBU3900 Cable
u BBU3900 Cable List:
Power Cable E1 Surge Protection Transfer Cable
FE Cable CPRI Optical Cable

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BBU Cable
u BBU3900 Cable List:
(2) cold-pressed
terminal
(1) RJ45
connector
Monitoring Signal Cable Between the OFB and the BBU
Monitoring Signal Cable Between the APMI and the BBU
(4) 3PIN connector
(3) ring terminal
(2) cold-pressed
terminal
(1) RJ45
connector

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MRFU Module
u The MRFU is a multi-carrier RF filtering unit. One MRFU supports a maximum of
6 carriers in GSM mode, 4 carriers in UMTS mode, 6 carriers in GSM+UMTS
mode.
u Functions:
Ø Implements the direct frequency conversion technique in the transmit channel,
modulates the baseband signals to GSM RF signals; then, sends the signals to the
antenna for transmission through the duplex filter after filtering, amplifying, and
combining the RF signals. The combining can be performed as required.
Ø Receives RF signals from the antenna and performs down-conversion, amplification,
analog-to-digital conversion, digital down-conversion, matched filtering.
Ø Provides power sharing. Improves the network coverage, reduces the interference and
power consumption and save the device cost.
Ø Provides power control, reverse power detection.
Ø Provides frequency synthesis and loopback test.
Ø Generates the CPRI clock, recovers the CPRI clock of lost synchronization, and detects
alarms.
Ø Provides the function of DPD/BPD.

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Logical structure of the MRFU
u The MRFU consists of the high-speed interface unit, signal processing unit,
power amplifier, and duplexer.

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MRFU Board
u Size：397.25mm（h）×70.62mm（w）×305mm（d）
Weight：10Kg
u Ports on the panel:
RJ45 connector
MON
3V3 power connector
PWR
RX_OUTA
CPRI1
Connecting to the antenna subsystem.
DIN connector
ANT_RXB
Port for
transceiving
RF signals
RX_INB
CPRI0
ANT_TX/RXA
Label
Monitoring port
Power supply port
RS485 Monitoring、debugging port.
Feeding power.
Output port of diversity signals in the
antenna channel.
Input port of diversity signals in the
antenna channel.
QMA female
connector
Interconnection port
for RF
Receive signals
Connecting to the lower-level RFU during
the cascading.
Connecting to the BBU, or the upper-level
RFU during the cascading.
SFP female connector
CPRI
Description
Connector Type
Port Type

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The main limitation of MRFU
u MRFU supports whole frequency band of PGSM 900MHz, high 45MHz frequency
band and low 45MHz frequency band of DCS1800MHz. High 40MHz frequency
band and low 40MHz frequency band of 1900MHz.
1740-1785MHz
1835-1880MHz
High 45MHz of 1800MHz
1870-1910MHz
1950-1990MHz
High 40MHz of 1900MHz
1850-1890MHz
1930-1970MHz
Low 40MHz of 1900MHz
1710-1755MHz
1805-1850MHz
Low 45MHz of 1800MHz
890-915MHz
935-960MHz
Whole 25MHz frequency band
of 900MHz
UL
DL
MRFU

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The main limitation of MRFU
u The instantaneous frequency bands supported by MRFU.
u Power sharing doesn’t support Concentric cell, Co-BCCH, IBCA, RAN sharing while
static power can support these functions.
u MRFU supports 2-way RX diversity. 4-way RX diversity and TX diversity are not
supported.
2
2
2
Number of RX
15MHz
20MHz
15MHz
frequency
band of TX
25MHz
1
GU dual mode
25MHz
1
UMTS mode
25MHz
1
GSM mode
frequency
band of RX
Number of TX
MRFU Type

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Configuration principle of MRFU
u Basic configuration principle:
Ø One MRFU supports a maximum cell configuration of S6.
Ø A single BTS3900 provides a maximum of 36 carriers with the maximum cell configuration of
S12/12/12. In addition, a site configured with the BTS3900s can support a maximum of 72
carriers with the maximum cell configuration of S24/24/24.
Ø One MRFU does not serve two cells. Each cell with a single antenna can be configured with
a maximum of two MRFUs.
Ø MRFU supports 1-way TX and 2-way RX.
Ø Star, chain, and ring, are supported between the BBU and the MRFUs.
Ø When star and chain topology is adopted between the BBU and MRFUs, the MRFU supports
3 levels of cascading in a chain and thus the BBU supports a maximum of 18 (6 x 3) MRFUs.

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Configuration principle Base on Limitation
of MRFU
u Assign frequency:
Ø If the frequency interval of a cell is outside the range of 15MHz, 2 MRFUs can be considered
to be used and the range of frequency for each MRFU also should be within15MHz.
Ø Generally, it is suggested that the number of carriers should be set to 2 MRFUs averagely if
2 MRFUs are used in a cell. For example: S8 should be configured as 4+4 when 2 MRFUs
are used. S7 should be configured as 3+4 when 2 MRFUs are used. If there’s limitation of
frequency band, S8 also can be configured as 3+5 or 2+6.
u Frequency hopping:
Ø Cell without frequency hopping. The cell can work normally when the range of frequency is
within 15MHz for each MRFU.
Ø Cell with Baseband frequency hopping. The frequency range of 2 MRFUs must within
25MHz when 2 MRFUs are used. And the range of frequency also must be within 15MHz
for each MRFU.
Ø Cell with RF frequency hopping. The cell cannot adopt RF frequency hopping if the range of
frequency is out of 15MHz. Because the frequency range of 2 MRFUs must be within 15MHz
when 2 MRFUs are used.

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Configuration principle Base on Limitation
of MRFU
u Output power:
Ø The maximum output power of MRFU is 80W.
Ø The output power for each cell must fulfil the requirement of network plan. When
the specification doesn’t fulfil the requirement, it can be improved by adding
MRFUs.
Ø The output power of all the cell must be the same because power sharing is
mutually exclusive with concentric cell. For example, S7 configured as 3+4 when 2
MRFUs are used. The output power of MRFU configured as 3 carriers must be the
same as that of MRFU configured as 4 carriers.
Ø Specifications of output power is Class 2, please refer to the next page.

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27
0
3
0
20
0
4
0
0
18
0
5
0
16
0
6
40
40
1
1
GSM+UMTS
mode
20
40
2
1
40
20
1
2
20
20
2
2
10
24
1
3
20
20
1
3
10
20
1
4
20
17
1
4
10
20
2
3
20
12
2
3
10
13
2
4
10
15
1
5
60
0
1
0
UMTS mode
40
0
2
0
0
27
0
4
0
31
0
3
0
40
0
2
0
80
0
1
GSM mode
Output power of each UMTS TRX(W)
Output power of each GSM TRX(W）
UMTS TRX
GSM TRX
Working mode
u Specifications of output power is Class 2:

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Antenna Configuration of MRFU
u Single Feeder.
Ø Two module interconnection. 1TX and 2RX.
u Double Feeder.
Ø Single module. 1TX and 2RX.

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Transmit Mode and Receive Mode of MRFU
u Transmit Mode of MRFU.
Ø Non-combination.
u Receive Mode of MRFU.
Ø 2-way RX diversity.

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Typical configuration of MRFU
u Single MRFU.
u Double feeder, 1TX + 2RX.
Ø When a dual-polarized antenna is configured, one
TX channel and two RX channels are supported.
The ANT_RXB and ANT_TX/RXA ports receive
the signals from the antenna to achieve RX
diversity.

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Typical configuration of MRFU
u Two module interconnection.
u Single feeder, 1TX + 2RX.
Ø When the cell configuration is from S7 to S12, two
MRFUs need to be configured.
Ø The ANT_TX/RXA port on each MRFU supports
the receiving and transmitting of signals. Two
MRFUs provide RX signals for each other through
the RF interconnection ports. Thus, the RX
diversity is implemented.

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Typical configuration S8/8/8

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Scenario 1

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Scenario 2
BBU
EMUA
APM30
GSM
S4/4/4
DCS
S888
Base Frame
W
R
R
U
W
R
R
U
W
R
R
U
W W W
WCDMA
S222
M
R
R
U
D
M
R
R
U
D
M
R
R
U
D
M
R
R
U
D
M
R
R
U
D
M
R
R
U
D
M
R
R
U
G
M
R
R
U
G
M
R
R
U
G

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Summary
u Functions of BTS3900
u Hardware structure of BTS3900
u New hardware of BTS3900
u Features and working mode of MRFU

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Thank you
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Huawei BTS 3900 Hardware Structure

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