EnodeB LTE FDD V100R005 Product Description ISSUE 1.01

8/20/2019 EnodeB LTE FDD V100R005 Product Description ISSUE 1.01

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eNodeB LTE FDD V100R005 Product Description

Confidential Information of Huawei. No Spreading Without Permission


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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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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



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


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.


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.


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



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



DIPSwitch


1 2 3 4


ON ON ON ON Unbalanced

Others Unavailable

DIPSwitch


1 2 3 4


ON ON ON ON UnbalancedOthers Unavailable

DIPSwitch


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



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



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



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




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


RTN(+)Power supply socket

NEG(-)

EXT_ALM Port for alarm reporting



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RRU3222Ports



No. Item Silkscreen Description

1

Ports at

the

bottom




2

Ports inthe

cablingcavity




NEG(-)




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RRU3808 Ports




1Ports at

the

bottom




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



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RRU3908 DC V1 Ports




1

Ports at

the

bottom

ANTA-TX/RXA TX/RX port A

ANTC-TX/RXB TX/RX port B


RX_IN/OUT Port for the inter-RRU RF cable

2

Ports in

thecablingcavity



RTN(+) Power supply socketNEG(-)


RST Hardware reset button



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RRU3908 DC V2 Ports




1

Ports at

the

bottom





2

Ports in

thecablingcavity



RTN(+) Power supply socketNEG(-)





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RRU3908 AC V1 Ports




1Ports at the

bottom





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




NEG(-)





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RRU3908 AC V2 Ports




1

Ports at

the

bottom





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




NEG(-)





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RRU ports and indicators on the panels



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


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



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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



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


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




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




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




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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Date post:	07-Aug-2018
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EnodeB LTE FDD V100R005 Product Description ISSUE 1.01

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