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HUAWEI BTS3900
Chapter 1
Chapter 1
BTS3900
BTS3900
Product Description
Product Description
BTS3900 Product Description
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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.
Features of BTS3900
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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.
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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
Features of BTS3900
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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.
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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.
Features of BTS3900
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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.
Chapter 1 BTS3900 Product Description
Chapter 2 BTS3900 System Structure
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
UBFA BSBC UPEA GTMU
Universal BBU Fan Unit Type A (2U)
Universal BBU Subrack Backplane Type C (2U) Universal power and Environment interface unit Type A (-48v)
Hardware Structure of the BTS3900
Typical configuration of the BTS3900 cabinet (-48V)
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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.
BBU3900 Equipment
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The BBU3900, which features a case structure, can be installed in a 19-inch-wide
and 2U-high indoor space or outdoor protective cabinet.
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BBU3900 equipment includes:
Ø GTMU Ø WMPT Ø WBBP Ø UTRP Ø UPEU Ø UEIU Ø UELP Ø UFLP Ø UBFA
Functions of the BBU3900
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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.
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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.
BBU3900 Slots
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
BBU Hardware – GTMU Board
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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.
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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.
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
BBU Hardware – GTMU Board
BBU Hardware – GTMU Board
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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
BBU Hardware – WMPT Board
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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.
uThe 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.
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
BBU Hardware – WMPT Board
BBU Hardware – WMPT Board
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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
BBU Hardware – WBBP Board
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This describes the WCDMA Baseband Process Unit (WBBP) board. It is a
mandatory board of the BBU3900 that processes baseband signals.
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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.
BBU Hardware – WBBP Board
uSpecifications 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 WBBPb4BBU Hardware – UPEU Board
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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.
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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.
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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.
BBU Hardware – UELP Board
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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
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The UELP has one DIP switch, which is used to select whether the receive
terminal is grounded.
BBU Hardware – UFLP Board
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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
BBU Hardware – UTRP Board
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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.
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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.
BBU Hardware – UTRP Board
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The panel of the UTRP configured with the UAEU or UIEU is different from
that of the UTRP configured with the UUAS.
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The UTRP can be configured with different sub-boards to support different ports.
BBU Hardware – UBFA Module
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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
BBU3900 Cable
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BBU3900 Cable List:
Power Cable E1 Surge Protection Transfer Cable
BBU Cable
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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
MRFU Module
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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.
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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.
Logical structure of the MRFU
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The MRFU consists of the high-speed interface unit, signal processing unit,
power amplifier, and duplexer.
MRFU Board
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Size：397.25mm（h）×70.62mm（w）×305mm（d）
Weight：10Kg
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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
The main limitation of MRFU
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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
The main limitation of MRFU
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The instantaneous frequency bands supported by MRFU.
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Power sharing doesn’t support Concentric cell, Co-BCCH, IBCA, RAN sharing while
static power can support these functions.
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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 TypeConfiguration principle of MRFU
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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
Configuration principle Base on Limitation
of MRFU
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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.
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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.
Configuration principle Base on Limitation
of MRFU
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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.
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 0 2 0 40 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
Antenna Configuration of MRFU
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Single Feeder.
Ø Two module interconnection. 1TX and 2RX.
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Double Feeder.
Transmit Mode and Receive Mode of
M
RFU
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Transmit Mode of MRFU.
Ø Non-combination.
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Receive Mode of MRFU.
Typical configuration of MRFU
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Single MRFU.
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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.
Typical configuration of MRFU
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Two module interconnection.
uSingle 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
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 GSummary
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Functions of BTS3900
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