enodeb lte fdd v100r005 product description issue 1.01
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eNodeB LTE FDD V100R005 Product Description
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E-UTRAN: Evolved UMTS Terrestrial Radio Access Network
EPC: Evolved Packet Core network
MME: Mobility Management Entity
S-GW: Server Gateway
Functions of NEs
eNodeB
Radio resource management, including radio bearer control, radio admission control,connection mobility control, and scheduling
Packet compression and ciphering
Routing of user plane data towards an S-GW
MME selection
Scheduling and transmission of broadcast information and paging messages
Measurement and measurement reporting configuration
MME
Paging message distribution
Security control
Mobility management in idle mode
SAE bearer control
Ciphering and integrity protection of Non-Access Stratum (NAS)signaling
S-GW
Termination of user plane packets that are generated for paging reason
Support for user plane handovers caused by UE mobility
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These base stations can be classified into single- and multi-mode base stations according toprovided services.
A single-mode base station (GBTS, NodeB, or eNodeB) can provide services for only one
mode (GSM, UMTS, or LTE), respectively.
A multi-mode base station (MBTS) can provide services of multiple modes. MBTSs are
classified into dual-mode and triple-mode base stations according to provided services.
A dual-mode base station, providing services of two modes, can work in GSM andUMTS (GU), GSM and LTE (GL), or UMTS and LTE (UL) mode.
A triple-mode base station, providing services of three modes, can work in GSM, UMTSand LTE (GUL) mode.
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eNodeB LTE FDD V100R005 Product Description
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eNodeBs are designed based on a distributed architecture. Each eNodeB consists of two basictypes of component: baseband unit BBU3900 and Radio Frequency (RF) unit RRU or RFU.
Logical structure of an eNodeB is as following
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Maximum throughput per eNodeB: uplink and downlink data rate at the MAC layer: 1500Mbit/s (packet size: 550bytes)
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The BBU3900 implements OM management, signaling processing, and radio resourcemanagement of the entire eNodeB system and provides ports for data communicationbetween the eNodeB and the MME/S-GW. The BBU3900 performs the following functions:
Provides ports for data communication between the eNodeB and the MME/S-GW.
Provides CPRI (Common Public Radio Interface) ports for communication between theBBU3900 and the RRUs.
Provides USB ports, which facilitate eNodeB upgrade when a USB disk is inserted intothe LMPT/UMPT during software installation and data configuration.
Provides the OM channel for connection to the M2000.
Processes uplink and downlink data.
Manages the entire eNodeB system in terms of OM and signaling processing.
Provides ports for the system clock.
Provides ports for alarm monitoring.
The BBU3900 features a compact case structure that only requires a 19-inch-wide and 2 U-high space. It can be installed on an indoor wall, on the staircase, in the storeroom, or in anoutdoor cabinet of the existing network.
The BBU3900 is configured with the following basic hardware units:
LTE Main Processing and Transmission unit (LMPT) or Universal Main Processing andTransmission Unit (UMPT)
LTE BaseBand Processing unit (LBBP)
Fan module, that is, FAN
Power module, that is, Universal Power and Environment interface Unit (UPEU)
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LMPT/UMPT
The LTE Main Processing and Transmission Unit (LMPT) or the Universal Main Processing andTransmission Unit (UMPT) is the main control and transmission unit of the BBU3900. Itmanages the entire eNodeB in terms of OM and signaling processing and provides clock
signals for the BBU3900.The UMPT is classified into two types: UMPTa1 and UMPTa2 to support UMTS or LTEseparately.
LBBP
The LTE Baseband Processing Unit (LBBP) is the baseband processing unit of the BBU3900. Itprocesses baseband signals and CPRI signals.
FAN
The FAN module controls the fan speed and monitors the temperature of the module. Itdissipates heat for boards and modules of the BBU3900.
UPEUThe Universal Power and Environment interface Unit (UPEU) is the power module of theBBU3900. It converts +24 V DC or -48 V DC power into the power required for boards andmodules of the BBU3900 and provides ports for transmission of external monitoring signalsand eight dry contact signals.
UTRP
Universal transmission processing unit expands transmission capabilities.
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Control Subsystem : The functions of the control subsystem are implemented by theLMPT/UMPT. This subsystem performs OM functions, processes signaling, and providesthe system clock. It manages the entire eNodeB
The OM functions include configuration management, fault management,
performance management, security management, and deployment. The signaling involves Packet Data Convergence Protocol (PDCP) signaling on the
Uu interface and Stream Control Transmission Protocol (SCTP) signaling on the S1and X2 interfaces.
The system clock can be one of the following types: Global Positioning System(GPS), IEEE1588 V2, synchronous Ethernet, or Clock over IP
Transport Subsystem: The functions of the transport subsystem are implemented by theLMPT/UMPT and UTRP
Provides ports for communication between the eNodeB and the EPC
Provides the OM channel between the eNodeB and the Local MaintenanceTerminal (LMT) or M2000
Provides ports for communication between the eNodeB and 2G/3G base stationsso that the E1/T1 transmission resources can be shared by the eNodeB and the2G/3G base stations
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System Reliability
Cold redundancy of main control boards In a BBU3900, two LMPT ( or two UMPT)boards are configured and work in active/standby mode. If the active LMPT (orUMPT) board experiences a major fault, an active/standby switchover is
automatically performed. An active/standby switchover can also be performed if auser runs the switchover command.
Operation and maintenance (O&M) channel backup The M2000 detects channelconnectivity by employing the handshake mechanism at the application layer. Ifdetecting that the active channel is disconnected, the M2000 instructs theeNodeB through the standby channel to perform a channel switchover. TheeNodeB automatically switches from the route for the active channel to the routefor the standby channel.
Route backup Route backup enhances transmission reliability by using a pair ofprimary and secondary routes to the same destination. The routes are prioritized:
A higher priority is set for the primary route, and a lower priority for thesecondary route.
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Ports on the UMPTa2
SilkscreenConnector Type
Quantity
Function
FE/GE1(optical port)
SFP 1 A 100 Mbit/s or 1000 Mbit/s adaptive Ethernet optical portis used for transmitting service data and signaling messages.
FE/GE0(electrical
port)RJ-45 1
A 10 Mbit/s, 100 Mbit/s, or 1000 Mbit/s adaptive Ethernetelectrical port is used for transmitting service data andsignaling messages.
USB(1)(2) USB 1
(1)The USB port with the USB silkscreen is used for thesoftware upgrade of a base station using a Universal SerialBus (USB) storage device. This port also functions as acommissioning Ethernet port.
(2)The USB port with the CLK silkscreen is used formultiplexing TOD and test clock.
E1/T1 portDB26
female1
The port is used for four E1/T1 signal inputs and outputsbetween the UMPT and the universal E1/T1 lightningprotection unit (UELP) or between base station controllers.
GPS SMA 1The port is used for transmitting radio frequency (RF) signalsreceived from the antenna to the satellite receiver.
CI SFP 1 The port is used for BBU interconnection.
RST - 1 Used for resetting the board.
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DIP switch SW1
DIP switch SW2
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DIPSwitch
DIP Status Description
1 2
SW1 ON ON The E1 resistance is set to 75 ohm.OFF ON The E1 resistance is set to 120 ohm.
ON OFF The T1 resistance is set to 100 ohm.
DIPSwitch
DIP Status Description
1 2 3 4
SW2 OFF OFF OFF OFF Balanced
ON ON ON ON Unbalanced
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Before accessing the base station through the ETH port, ensure that an OM port has beenopened and the user has obtained required authorities for accessing the base stationthrough the OM port.
The security of the USB port is ensured by encryption.
The TST port is used for commissioning the base station rather than importing orexporting the base station configuration.
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Indicators on the panel of the LBBP
Indicator Color Status Description
RUN Green Steady on There is power supply, but the board is faulty.
Steady off There is no power supply.
On for 1s andoff for 1s
The board is functioning properly according to theconfiguration.
On for 0.125sand off for
0.125s
The board is being loaded or configured, the boardis not started, or the board is running in a safetyversion.
ALM Green Steady on An alarm is generated, and the board must bereplaced.
On for 1s andoff for 1s
An alarm is generated, and the alarm may becaused by another faulty board or port. Therefore,
you need to locate the fault before decidingwhether to replace the board.
Steady off There is no fault.
ACT Red Steady off The board serves as an active board.
Steady on The board is in the non-active mode, not activated,not configured, or is manually blocked. Therefore, itdoes not provide any services.
On for 1s andoff for 1s
The power supply for the board is insufficient.
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Cell and Antenna Configuration means the maximum specification supported by theLBBP. For example, the maximum specification supported by the LBBPc is 3 x 10 MHz,4T4R channel, then the configurations of 3 x 1.4 MHz, 4T4R channel, of 3 x 3 MHz, 4T4Rchannel, and of 3 x 5 MHz, 4T4R channel are supported by the LBBPc.
System Reliability Intra-board baseband resource pool Intra-board baseband resource pools are
designed to enable dynamic allocation of baseband resources based on thespecifications and load status of an LTE baseband processing unit (LBBP). Thisincreases the usage of baseband resources and improves system reliability.
Inter-board cell reestablishment Inter-board cell reestablishment is designed toenable mutual backup between LBBP boards
Redundancy of common public radio interface (CPRI) ports
Hot redundancy: A remote radio unit (RRU) is connected to two CPRI ports
on different LBBP boards to form a ring topology. If a CPRI port is faulty,the service interruption time does not exceed 500 ms. If the LBBP boardwhere the cell is established is faulty, the cell is reestablished on the otherLBBP board, with a service interruption time shorter than 20s.
Cold redundancy: RRUs are connected to two CPRI ports to form a ringtopology. The two CPRI ports are provided by either one or two LBBPboards. If a CPRI port or LBBP board is faulty, the cell is reestablished, witha service interruption time shorter than 20s.
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Indicators on the FAN module
Indicator Color Status Description
STATEGreen
Blinking at 4 Hz (ON for
0.125s and OFF for 0.125s)
The module is not registered
and does not report alarms.Blinking at 0.5 Hz (ON for
1s and OFF for 1s)The module works properly.
Red ON The module is reporting alarms.
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Ports on the UPEU
Specifications of the UPEU
SilkscreenConnector Type
Function
+24 V/-48V(UPEUa, UPEUb)
7W2 Introducing +24 V or -48 V DC power
+24V/-48 V(UPEUc, UPEUd)
3V3 Introducing +24 V or -48 V DC power
EXT-ALM0 RJ-45 No.0 to 3 Boolean signal input ports
EXT-ALM1 RJ-45 No.4 to 7 Boolean signal input ports
MON0 RJ-45 Used to provide transmission of one RS485 monitoring signal
MON1 RJ-45 Used to provide transmission of one RS485 monitoring signal
Board Output Power Backup Mode
UPEUa The output power of a UPEUa is 300 W. 1+1 backup
UPEUc The output power of a UPEUc is 360 W, and the outputpower of two UPEUc boards is 650 W.
1+1 backup
UPEUa+UPEUc The total output power of a UPEUa and a UPEUc is 360 W. -
UPEUd The output power of a UPEUd is 650 W. 1+1 backup
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Ports on the UEIU
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Silkscreen Connector Type Function
EXT-ALM0 RJ-45 Port for Boolean inputs 0 to 3
EXT-ALM1 RJ-45 Port for Boolean inputs 4 to 7
MON0 RJ-45 Port for RS485 input 0
MON1 RJ-45 Port for RS485 input 1
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Ports on UTRPb4
Ports on the panel of the UTRPc
Silkscreen Port Quantity Connector
E1/T1 E1/T1 2 DB26 connector
Silkscreen Port Quantity Connector
FE/GE0 to FE/GE1 FE/GE optical port 2 SFP connector
FE/GE2 to FE/GE5 FE/GE electrical port 4 RJ45 connector
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Settings of SW1 on the UTRPb4
Settings of SW2 on the UTRPb4
Settings of SW3 on the UTRPb4
DIPSwitch
DIP Status Description
1 2 3 4
SW1 OFF OFF OFF OFF Balanced
ON ON ON ON Unbalanced
Others Unavailable
DIPSwitch
DIP Status Description
1 2 3 4
SW2 OFF OFF OFF OFF Balanced
ON ON ON ON UnbalancedOthers Unavailable
DIPSwitch
DIP Status Description
1 2 3 4
SW3 OFF OFF ON ON T1
ON ON OFF OFF The E1 resistance is set to 120 ohm.
ON ON ON ON The E1 resistance is set to 75 ohm.
Others Unavailable
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Ports on the USCU
Indicators on the TOD port
Port Connector Description
GPS SMA coaxialconnector
The GPS ports on the USCUb12 and USCUb21 receive GPS signals.The GPS port on the USCUb11 is reserved. It cannot receive GPS signals.
RGPS port PCB weldedwiring terminal
The RGPS port on the USCUb11 receives RGPS signals.The RGPS ports on the USCUb12 and USCUb21 are reserved. They cannotreceive RGPS signals.
TOD0 port RJ45 connector Receiving or transmitting 1PPS+TOD signals
TOD1 port RJ45 connector Receiving or transmitting 1PPS+TOD signals, and receiving TOD signalsfrom the M1000
BITS port SMA coaxialconnector
Receiving BITS clock signals, supporting adaptive input of 2.048 MHz and10 MHz clock reference source
M-1PPS port SMA coaxialconnector
Receiving 1PPS signals from the M1000
Color Description Default Configuration
Green If the indicator is steady on, the TODport is configured as an input port.
The green indicator of the TOD0 port is off, andthe yellow indicator of the TOD0 port is on.
Yellow If the indicator is steady on, the TODport is configured as an output port.
The yellow indicator of the TOD1 port is Off,and the green indicator of the TOD1 port is On.
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E1/T1 Line Clock Synchronization
With an E1/T1 line clock, a base station obtains frequency synchronization signals fromthe physical layer of an E1/T1 link to achieve clock synchronization. An E1/T1 line clockcan be used when a base station uses the E1/T1 transmission scheme and clock signals
are available on the E1/T1 link. IP Clock (Clock over IP) Synchronization
Clock over IP is a Huawei proprietary frequency synchronization technology, in whichfrequency synchronization packets are transmitted over IP. With clock over IP, onlyfrequency synchronization is supported. When a base station uses this synchronizationmode, the synchronization tolerance can be±0.05 ppm. The ppm stands for parts permillion. A clock over IP can be used when a base station works in IP over FE mode and anIP clock server is configured in the network.
IP Clock (IEEE1588 V2) Synchronization
IEEE1588 V2 defines the Precision Time Protocol (PTP), which targets synchronization ofclocks in the Ethernet, with the precision to microseconds. With an IEEE1588 V2 clock,
both frequency synchronization and time synchronization are supported. An IEEE1588 V2clock can be used when a base station works in IP over FE mode and an IP clock server isconfigured in the network.
Synchronous Ethernet Clock Synchronization
With a synchronous Ethernet clock, a base station traces the upstream clock byrecovering clock signals from the serial data bit streams received at the physical layer toachieve synchronization. In synchronous Ethernet, only frequency synchronization issupported, with the synchronization tolerance±0.05 ppm. A synchronous Ethernetclock can be used when a base station works in IP over FE mode and the transportnetwork supports the synchronous Ethernet clock.
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The RF Unit implements the following functions
Receives downlink baseband data from the BBU and sends uplink baseband datafor the communication between the BBU and the RRU
Receives RF signals from the antenna system, down-converts the received signals
to IF signals, amplifies the IF signals, and performs analog-to-digital conversion.The TX channel filters downlink signals, performs digital-to-analog conversion,and up-converts RF signals to the TX band.
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Radio frequency units (RFUs) are used in a macro base station to perform modulation,demodulation, data processing and power amplification of RF and baseband signals, and conductvoltage standing wave ratio (VSWR) detection.
CRFUd, LRFUe, MRFUd and MRFUe modules must be used with the BTS3900 (Ver.C), BTS3900L(Ver.C), BTS3900A (Ver.C), or BTS3900AL (Ver.A) cabinet.
CRFUd supports two carriers. The bandwidth per carrier is 1.4, 3, 5, 10, 15, or 20 MHz; the totalbandwidth between the maximum frequency and the minimum frequency of the spectrums fortwo carriers does not exceed 40 MHz.
LFRU supports one carrier with a bandwidth of 5, 10, 15, or 20 MHz in the 2600 MHz band.
LRFUe supports two carriers. The bandwidth per carrier is 5, 10, 15, or 20 MHz; the totalbandwidth between the maximum frequency and the minimum frequency of the spectrums fortwo carriers does not exceed 30 MHz.
MRFU supports one carrier with a bandwidth of 1.4/3/5/10/15/20 MHz in the 900MHz band, orone carrier with bandwidth of 5/10/15/20 MHz in the 1800MHz band.
MRFUd supports two carriers with a bandwidth of 1.4/3/5/10/15/20 MHz, the output power percarrier is,
2 x 60W, When support one carrier with a bandwidth of 5/10/15/20 MHz
2 x 40W, When support one carrier with a bandwidth of 1.4/3 MHz
2 x 40W, When support two carriers with a bandwidth of 1.4/3/5/10/15/20 MHz
MRFUe supports two carriers with a bandwidth of 1.4/3/5/10/15/20 MHz, the output power percarrier is,
with a bandwidth of 5/10/15/20 MHz: 1*60W
with a bandwidth of 1.4/3 MHz: 1*40W
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The RF system performs modulation, demodulation, data processing, combining, andsplitting for baseband signals and RF signals.
CPRI Module
The CPRI receives downlink baseband data from the BBU and transmits uplink basebanddata to the BBU for communications between the RRU and the BBU.
Power Module, the power module converts -48 V DC power into the power required bythe other parts of the RRU.
TRX
The TRX provides two RX channels for uplink RF signals, two TX channels for downlink RFsignals, and one feedback channel.
The RX channels down-convert the received signals into IF signals, amplify them,and then perform analog-to-digital (A/D) conversion.
The TX channels perform filtering of downlink signals, digital-to-analog (D/A)conversion, and up-conversion of RF signals into transmit band.
The feedback channel assists in downlink power control, Digital Pre-distortion(DPD), and Voltage Standing Wave Ratio (VSWR) measurement.
PA, the Power Amplifier amplifies the low-power RF signals received from the TRX.
LNA, the Low Noise Amplifier (LNA) amplifies the signals received from the antenna.
Duplexer, the duplexer multiplexes the RX signals and the TX signals, which enables theRX signals and the TX signals to share the same antenna path. The duplexer also filtersthe RX signals and the TX signals.
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LRFU Ports
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Silkscreen Connector Function
ANT_TX/RXB DIN
RF TX/RX port, connected to the antennasystemANT_TX/RXA DIN
CPRI0 SFP femaleConnected to the BBU or the upper-levelcascaded MRFU
CPRI1 SFP female Connected to the lower-level cascaded MRFU
PWR 3V3 power Introducing power input
MON RJ-45 Monitoring and maintaining port
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MRFU Ports
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Port Silkscreen Connector Function
RF PortANT_RXB DIN RF RX port, connected to the antennasystem
ANT_TX/RXA
DINRF TX/RX port, connected to theantenna system
CPRI interface
CPRI0 SFP femaleConnected to the BBU or the upper-level cascaded MRFU
CPRI1 SFP femaleConnected to the lower-levelcascaded MRFU
Inter-MRFURF signal port
RX_INB QMA female Input port for diversity receive
RX_OUTA QMA female Output port for main receive
Power supplysocket
PWR 3V3 power Introducing power input
Monitoringports
MON RJ-45 Monitoring and maintaining port
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Remote radio units (RRUs) are used in a distributed base station to perform modulation,demodulation, data processing, and power amplification of baseband and radiofrequency (RF) signals, and conduct voltage standing wave ratio (VSWR) detection.
AWS:Advanced wireless service 1.7G or 2.1G
RRU3201 supports one carrier with a bandwidth of:
5 or 10 MHz in the 700 MHz band
5, 10, 15, or 20 MHz in the 2600 MHz band
RRU3203 supports one carrier with a bandwidth of 1.4, 3, 5, 10, or 15 MHz
RRU3220/RRU3222/RRU3223 supports one carrier with a bandwidth of 5, 10, 15, or 20MHz
RRU3221/RRU3929/RRU3240/RRU3841 supports two carriers. The bandwidth percarrier is 5, 10, 15, or 20 MHz; the total bandwidth between the maximum frequency
and the minimum frequency of the spectrums for two carriers does not exceed 40 MHz
RRU3908V1 supports one carrier with a bandwidth of 3/5/10/15/20 MHz bandwidth inthe 1800MHz frequency Band
RRU3908V2 supports one carrier with a bandwidth of 1.4/3/5/10/15/20 MHzbandwidth in the 900MHz frequency Band
RRU3928/RRU3929/RRU3942 supports 2 carriers with a bandwidth of1.4/3/5/10/15/20MHz
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The RF system performs modulation, demodulation, data processing, combining, andsplitting for baseband signals and RF signals.
CPRI Module
The CPRI receives downlink baseband data from the BBU and transmits uplink basebanddata to the BBU for communications between the RRU and the BBU.
Power Module, the power module converts -48 V DC power into the power required bythe other parts of the RRU.
TRX
The TRX provides two RX channels for uplink RF signals, two TX channels for downlink RFsignals, and one feedback channel.
The RX channels down-convert the received signals into IF signals, amplify them,and then perform analog-to-digital (A/D) conversion.
The TX channels perform filtering of downlink signals, digital-to-analog (D/A)conversion, and up-conversion of RF signals into transmit band.
The feedback channel assists in downlink power control, Digital Pre-distortion(DPD), and Voltage Standing Wave Ratio (VSWR) measurement.
PA, the Power Amplifier amplifies the low-power RF signals received from the TRX.
LNA, the Low Noise Amplifier (LNA) amplifies the signals received from the antenna.
Duplexer, the duplexer multiplexes the RX signals and the TX signals, which enables theRX signals and the TX signals to share the same antenna path. The duplexer also filtersthe RX signals and the TX signals.
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RRU3201 Ports
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No Item Silkscreen Description
1
Ports at
the
bottom
ANTA-TX/RX Main TX/RX port
ANTC-TX/RX Diversity TX/RX port
RET/MON Communication port of the RET antenna
2
Ports inthe
cablingcavity
TX RX CPRI0_EEastbound and Westbound optical port
TX RX CPRI_W
RTN0(+)Main power supply socket
NEG0(-)
RTN1(+) Power supply socket for cascading RRUsNEG1(-)
3 Indicators See next page
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RRU3220 Ports
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No Item Silkscreen Description
1Ports at
the
bottom
ANTA-TX/RXA TX/RX port
ANTC-TX/RXB TX/RX port
RET Communication port of the RET antenna
2
Ports inthe
cablingcavity
TX RX CPRI0 Optical/electrical port 0
TX RX CPRI1 Optical/electrical port 1
RTN(+)Power supply socket
NEG(-)
EXT_ALM Port for alarm reporting
3 Indicators See next page
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RRU3222Ports
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No. Item Silkscreen Description
1
Ports at
the
bottom
ANTA-TX/RXA TX/RX port
ANTC-TX/RXB TX/RX port
RET Communication port of the RET antenna
2
Ports inthe
cablingcavity
TX RX CPRI0 Optical/electrical port 0
TX RX CPRI1 Optical/electrical port 1
RTN(+)Power supply socket
NEG(-)
EXT_ALM Port for alarm reporting
3 Indicators See next page
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RRU3808 Ports
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No. Item Silkscreen Description
1Ports at
the
bottom
ANTA-TX/RXA TX/RX port
ANTC-TX/RXB TX/RX port
RET Communication port of the RET antenna
2
Ports inthe
cabling
cavity
TX RX CPRI_E Eastbound optical port
TX RX CPRI_W Westbound optical port
RTN(+)0Main power supply socket
NEG(-)0
RTN(+)1Power supply socket for cascading RRUs
NEG(-)1
3 Indicators See next page
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RRU3908 DC V1 Ports
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No. Item Silkscreen Description
1
Ports at
the
bottom
ANTA-TX/RXA TX/RX port A
ANTC-TX/RXB TX/RX port B
RET Communication port of the RET antenna
RX_IN/OUT Port for the inter-RRU RF cable
2
Ports in
thecablingcavity
TX RX CPRI_E Eastbound optical port
TX RX CPRI_W Westbound optical port
RTN(+) Power supply socketNEG(-)
EXT_ALM Port for alarm reporting
RST Hardware reset button
3 Indicators See next page
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RRU3908 DC V2 Ports
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No. Item Silkscreen Description
1
Ports at
the
bottom
ANTA-TX/RXA TX/RX port A
ANTC-TX/RXB TX/RX port B
RET Communication port of the RET antenna
RX_IN/OUT Port for the inter-RRU RF cable
2
Ports in
thecablingcavity
TX RX CPRI_E Eastbound optical port
TX RX CPRI_W Westbound optical port
RTN(+) Power supply socketNEG(-)
EXT_ALM Port for alarm reporting
RST Hardware reset button
3 Indicators See next page
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RRU3908 AC V1 Ports
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No Item Silkscreen Description
1Ports at the
bottom
ANTA-TX/RXA TX/RX port A
ANTC-TX/RXB TX/RX port B
RET Communication port of the RET antenna
RX_IN/OUT Port for the inter-RRU RF cable
AC-in AC-in port on the AC/DC module of an RRU
DC-out DC-out port on the AC/DC module of an RRU
2Ports in the
cablingcavity
TX RX CPRI_E Eastbound optical port
TX RX CPRI_W Westbound optical port
RTN(+)Power supply socket
NEG(-)
EXT_ALM Port for alarm reporting
RST Hardware reset button
3 Indicators See next page
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RRU3908 AC V2 Ports
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No. Item Silkscreen Description
1
Ports at
the
bottom
ANTA-TX/RXA TX/RX port A
ANTC-TX/RXB TX/RX port B
RET Communication port of the RET antenna
RX_IN/OUT Port for the inter-RRU RF cable
AC-in AC-in port on the AC/DC module of an RRU
DC-out DC-out port on the AC/DC module of an RRU
2
Ports inthe
cablingcavity
TX RX CPRI_E Eastbound optical port
TX RX CPRI_W Westbound optical port
RTN(+)Power supply socket
NEG(-)
EXT_ALM Port for alarm reporting
RST Hardware reset button
3 Indicators See next page
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RRU ports and indicators on the panels
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Item Silkscreen Description
Ports at
thebottom
ANT_TX/RXA TX/RX port A, supporting RET signal transmission
ANT_RXC RX port CANT_RXD Port RX port D
ANT_TX/RXB TX/RX port B
RX_IN/OUT Port for the inter-RRU RF cable
RET Communication port for the RET antenna, supportingRET signal transmission
Ports inthe
cabling
cavity
RTN(+) Power supply socket
NEG(-)
CPRI0 Optical/electrical port 0
CPRI1 Optical/electrical port 1
EXT_ALM Port for alarm reporting
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An RRU3240, which is a remote radio unit for LTE, supports a maximum of two carriers.
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STMA (Smart Tower-mounted Amplifier) mode. In this mode, the distance between theRRU and the RCU is longer than 20 m and the TMA is required for the eNodeB.
A command is sent to the BBU on the M2000 or the LMT, and then the BBUtransfers that command to the RRU. The RRU transfers the DC power and the
OOK (On-Off-Keying ) signals to the STMA from the connector on top of thecabinet. The STMA demodulates the OOK signals to RS485 signals and thensupplies the RS485 signals and part of the DC power to the RCU.
SBT( Smart Bias-Tee ) mode. In this mode, the distance between the RRU and the RCU islonger than 20 m and the TMA is not required for the eNodeB.
A command is sent to the BBU on the M2000 or the LMT, and then the BBUtransfers that command to the RRU. The RRU transfer the DC power and the OOKsignals to the SBT from the connector on top of the cabinet. The SBTdemodulates the OOK signals to RS485 signals and then supplies the RS485signals and part of the DC power to the RCU.
Direct connection through multi-core cables. In this mode, the distance between the RRUand the RCU( Remote Control Unit ) is shorter than 20 m.
A command is sent to the BBU on the M2000 or the LMT, and then the BBUtransfers that command to the RRU. The RRU modulates the command to RS485signals, and then transfers the signals and the DC power to the RCU throughmulti-core cables.
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In the case, RCU of Huawei and the SBT of Kathrein are configured.
The RCU (Remote Control Unit) is the motor drive of the phase shifter inside the electricalantenna. It receives and runs the control commands from the base station and drives the
stepper motor. The stepper motor drives the phase shifter inside the antenna device, andthe phase shifter adjusts the antenna tilt. Interface RS485 functions as the controlinterface of the RCU.
The SBT (Smart Bias-Tee) provides DC power supply and control commands through thefeeder for the RCU. The SBT is installed on the RET antenna side. The SBT provides thefollowing functions:
The SBT converts the control commands that are modulated with OOK by thefeeder into the RS485 signals and transfers the signals to the RCU.
The SBT converts the RS485 signals from the RCU into OOK signals and transfersthe signals to the feeder.
The SBT divides and sends the RF signals and control signals from the feeder tothe antenna and the RCU.
The SBT transmits the direct current from the feeder to the RCU.
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Components in the BTS3900A cabinet
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ModuleOptional orMandatory
Max.ConfigPer Cabinet Remarks
RFU Optional 6 The RFU performs modulation and demodulation
between baseband signals and RF signals,processes data, and combines and divides signals.
RFU fillerpanel
Optional 6 To ensure proper ventilation of the cabinet, theslot in the RFU subrack that is not installed with anRFU must be installed with a filler panel.
Fan box Mandatory 1 The fan dissipates the heat in the cabinet.
BBU3900 Optional 1 The BBU3900 processes the baseband signals andenables interaction between the base station andthe base station controller.
DCDU-01 Mandatory 1 The DCDU-01 provides DC power to allcomponents in the cabinet.
Powerequipment
(DC/DC)
Mandatory 1 The power equipment (DC/DC) converts external+24 V DC power into –48 V DC power andprovides power to all components in the cabinet.
Powerequipment
(AC/DC)
Optional 1 The power equipment (AC/DC) converts external220 V AC single-phase, 220 V AC three-phase, and110 V AC dual-live-wire power into –48 V DC andprovides power to all components in the cabinet.
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Specification of BTS3900L cabinet
Item Specification
Dimensions
Cabinet dimensions 1600mm(H)*600mm(W)*450(D)
Base dimensions 40mm(H)*600mm(W)*450(D)
Weight
empty cabinet ≤75Kg
Assembly cabinet ≤110kg
With full configuration ≤235kg
Power Supply -48VDC -48V(-38.4~-57V)
Power Consumption ≤5860W
Heat Consumption ≤5010W
Temperaturelong term -20℃~50℃
Short term 50℃~55℃
Humidity 5%~95%RH
Installation Type
Support installation on concrete ground,and anti-electro static floor.Installing back on wall, maintenance infront, no need to open the back door.
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To meet requirements in different outdoor environments, multiple cabinets with differentfunctions are provided by Huawei for distributed macro base stations. The AdvancedPower module with heat exchanger (APM30H) provides space and surge protection andenables power distribution and heat dissipation for the BBU3900 and RFU. The Integrated
Battery Backup System with direct ventilation (IBBS200D) and Integrated Battery BackupSystem with TEC cooler (IBBS200T) provides long-duration backup power for a basestation. The Transmission Cabinet of 11 U high with heat exchanger (TMC11H) providesspace for customer equipment.
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The advanced power module APM30 is a power backup system for outdoor applications.It provides the DBS3900 with –48 V DC power and backup batteries. It also providesspace for the BBU3900 and customer equipment to facilitate rapid network deployment.
With -48V 24Ah build-in batteries:5U space
Without build-in batteries:7U space
The APM30 can provide the following functions:
DC power supply
Battery management
Power system monitoring
Power distribution
Surge protection
Temperature control Power backup
Accommodation of customer equipment
The APM30, small and light, can be configured with built-in 24 Ah batteries anddissipates heat using a breathable film and fans. The APM30H can be configured in low-air-quality areas. The APM30H dissipates heat using a heat exchanger and outer andinner air circulation fans.
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Components in the APM30H cabinet
ModuleOptional orMandatory
Max.ConfigPer Cabinet
Remarks
1. Fan box Mandatory 1The fan box is configured with the fan, Hert PowerMonitoring Interface unit (HPMI), and CentralMonitoring Unit type A (CMUA). It is used todissipate heat in the cabinet.
2. SLPU Mandatory 2
Providing protection for trunk signals as amandatory component. The SLPU is configuredwith the Universal E1/T1 Lightning Protection unit(UELP) or Universal FE Lightning Protection unit(UFLP).The SLPU is an optional component, which is used
to protect monitoring signals, is installed in the 1 Uspace below the BBU. It contains twoUniversal Signal Lightning Protection unit 2(USLP2s).
3. PSU(AC/DC)
Mandatory 3The power supply unit (PSU) converts 110 V/220 VAC power into -48 V DC power.
4. EPSsubrack
Mandatory 1
The EPS provides functions of AC and DC powerdistribution for the cabinet. There are two types ofEPSs, which are used in 110 V AC and 220 V ACpower supply scenarios.
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Components in the IBBS200D cabinet
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ModuleOptional orMandatory
Max. ConfigPer Cabinet
Remarks
1. Fan box Mandatory 2The FAN is installed on the front doorof the cabinet, dissipating heat in thecabinet.
2. CMUA Mandatory 1
The CMUA provides functions oftemperature control, Boolean alarmdetection, and ELU identification of thecabinet.
3. Power
distributionbox Mandatory 1
The power distribution box is installedon the upper right of the cabinet,
transferring and distributing power tothe TEC or fan and to the batteries.
4. Battery Mandatory 8The battery provides long-durationbackup power for a base station.
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Components in the IBBS200T cabinet
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ModuleOptional orMandatory
Max.ConfigPer Cabinet Remarks
1. TEC Mandatory 1 The TEC is installed in the protecting hood forthe TEC on the front door of the cabinet. TheTEC consists of the TEC module, inner aircirculation fan, outer air circulation fan, heat-dissipation piece, and monitoring board.
2.CMUA
Mandatory 1 The CMUA provides functions of temperaturecontrol, Boolean alarm detection, and ELUidentification of the cabinet.
3. Power
Distribution box
Mandatory 1 The power distribution box is installed on the
upper right of the cabinet, transferring anddistributing power to the TEC or fan and tothe batteries.
4.Battery
Mandatory 8 The battery provides long-duration backuppower for a base station.
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The TMC can be configured when more space is required for transmissionequipment. The cabinet, used outdoors, is small in size and easy to transport. TheTMC dissipates heat through a breathable film and fans. The BBU3900 can beinstalled in the TMC.
A TMC can provide a maximum of 11 U space for customer equipment. TMC11H providing space for the transmission equipment, as shown in A
TMC11H configured with the BBU3900 in the -48 V DC power supply scenario, asshown in B
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When long-term power backup is required, the battery cabinet (BBC) can be configured.The cabinet, used outdoors, is small in size and easy to transport. The BBC dissipates heatin direct-ventilation mode.
Configured with built-in battery groups, a BBC can provide a maximum of –48 V DC 184
Ah backup power.
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It can be installed on the ground.
It supports the installation of six RRUs.
The upper and lower adjustable beams on an IFS06 can be moved up and down to fitfor heights of RRUs.
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Power cables shipped with RRUs cannot support long-distance power supply. Therefore,when power supply is far from the equipment, cables with large core diameters are used,and an OCB connects these cables and RRU power cables
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To meet requirements in different outdoor environments, multiple cabinets with differentfunctions are provided by Huawei for distributed macro base stations. The AdvancedPower module with heat exchanger (APM30H) and Radio Frequency Cabinet (RFC)provides space and surge protection and enables power distribution and heat dissipation
for the BBU3900 and RFU. The Integrated Battery Backup System with direct ventilation(IBBS200D) and Integrated Battery Backup System with TEC cooler (IBBS200T) provideslong-duration backup power for a base station. The Transmission Cabinet of 11 U highwith heat exchanger (TMC11H) provides space for customer equipment.
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Components in the TMC11H cabinet
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ModuleOptional orMandatory
Max. Config/Cabinet
Remarks
1. DCDU-01
Mandatory 1
The Direct Current Distribution Unit-01 (DCDU-01) is a DC powerdistribution unit supplying power toeach component in the RFC.
2. Fan box Mandatory 1
The fan box is configured with thefan and CMUA. The fan dissipatesheat in the cabinet, and the CMUAprovides the functions of thetemperature control, Boolean alarm
detection, and ELU identification ofthe cabinet.
3. RFU Mandatory 6
The RFU, a Radio Frequency Unit,performs the functions such asmodulation and demodulationbetween baseband signals and RFsignals, data processing, and signalcombination and division.
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A x B MHz indicates that an eNodeB is configured with A cells of B MHz bandwidth. xTyR indicates that each cell uses x TX channels and y RX channels. For example, "3 x 10MHz, 2T2R" indicates that the eNodeB is configured with three cells of 10 MHzbandwidth, and each cell uses two TX channels and two RX channels.
Besides, UMPT, LBBPb , LBBPd1, LBBPd2, 2TX4RX or 4TX4RX RRU and other RFU can beused for the specific configurations.
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Different quality of RFUs or RRU will be configured according to the specific types ofRRUs or RRUs with different quality of antenna ports.
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Different quality of RFUs or RRU will be configured according to the specific types withdifferent quality of antenna ports.
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Topology Advantage Disadvantage Remarks
Star •Transmission reliability ishigh. When an RRU or anoptical fiber is faulty, onlythe related sector isaffected.
•Installation and
maintenance are easy.
RRUs cannot be cascaded whenthe star topology is used.
RRUs can be connected to anyCPRI ports on the LBBPc orLBBPd when the star topologyis used.
Chain The chain topologyreduces the cost foroptical fibers.
•The number of cascading levelsand cascading distances arerestricted.
•Faults in an upper-level RRUmay affect lower-level RRUs.
•RRU3232s cannot becascaded.
•A maximum of four RRU3251scan be cascaded.
•RRUs to be cascaded musthave the same CPRI data rate.
Load-
sharing
•Transmission reliability
improves.•Wider transmissionbandwidth can beachieved with two opticalfibers.
•Two optical fibers must be
connected to one RRU.•The inter-board load-sharingtopology requires two LBBPc orLBBPd boards.
•RRUs cannot be cascadedwhen the load-sharing topologyis used.
If the LBBPc is used, a 20 MHz
8T8R cell is supported onlywhen the load-sharingtopology is used.
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Star topology
Advantage: Each eNodeB is connected directly to the MME through the transport network.Therefore, this simple topology features easy engineering, maintenance, and capacityexpansion; Each eNodeB exchanges data with the MME directly. Signals travel through only
a few nodes, and therefore network reliability is high Disadvantage: Compared with the other two topologies, the star topology requires more
transmission resources
Chain topology & Tree topology
Advantage: The costs of transmission equipment, engineering, and transport line lease arerelatively low
Disadvantage: Signals travel through many nodes, and therefore network reliability is low.Each lower-level eNodeB occupies some transmission bandwidth of its upper-level eNodeB.Reliability of the upper-level eNodeB affects operation of the lower-level eNodeB.
System Reliability
Route backup
Route backup enhances transmission reliability by using a pair of primary andsecondary routes to the same destination. The routes are prioritized: A higher priorityis set for the primary route, and a lower priority for the secondary route.
Operation and maintenance (O&M) channel backup
The M2000 detects channel connectivity by employing the handshake mechanism atthe application layer. If detecting that the active channel is disconnected, the M2000instructs the eNodeB through the standby channel to perform a channel switchover.The eNodeB automatically switches from the route for the active channel to theroute for the standby channel.
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Common transmission with IP (Back Plane)
In this figure, A, B, and C are the three Site Units of the MBTS connected through backplane
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The MBTS can achieve route backup by using common transmission with IP, which enablesbackup between traffic channels.
When the MBTS supports route backup, each SiteUnit has two transmission channels, that is,the main channel and the backup channel.
Main channel: When each SiteUnit connects to the transport network by using anindependent physical transmission port, this independent transmission link is the mainchannel for each SiteUnit.
Backup channel: When the main control boards of two SiteUnits are interconnectedby using FE/GE ports, each SiteUnit's independent transmission link serves as abackup channel for the other SiteUnit. FE stands for fast Ethernet and GE stands forgigabit Ethernet.
Under normal circumstances, the GBTS and NodeB use their own independent transmissionlinks (main channels) to transmit data. No impact exists between the GBTS and NodeB interms of transmission. If the main channel of the NodeB is faulty, the backup channel will beused and the NodeB's data is transferred to the GTMU board over the FE interconnectioncable. Moreover, the transmission link of the GBTS (the backup channel) will be used toensure that high-priority maintenance and service data will not be affected. After the mainchannel of the NodeB is restored, the system automatically switches back to the mainchannel to transmit data.
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The UMTS traffic is transmitted on one path whereas the LTE traffic is transmitted ondifferent paths
Both UMTS traffic and LTE traffic are transmitted on different paths
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eNodeB LTE FDD V100R005 Product Description
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8/20/2019 EnodeB LTE FDD V100R005 Product Description ISSUE 1.01
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eNodeB LTE FDD V100R005 Product Description