eNodeB LTE FDD V100R005 Product Description Confidential Information of Huawei. No Spreading Without Permission

eNodeB LTE FDD V100R005 Product Description

Confidential Information of Huawei. No Spreading Without Permission






   

 





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 Confidential Information of Huawei. No Spreading Without Permission






These base stations can be classified into single- and multi-mode base stations according to provided 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 and UMTS (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, UMTS and LTE (GUL) mode.







eNodeBs are designed based on a distributed architecture. Each eNodeB consists of two basic types of component: baseband unit BBU3900 and Radio Frequency (RF) unit RRU or RFU. Logical structure of an eNodeB is as following





Maximum throughput per eNodeB: uplink and downlink data rate at the MAC layer: 1500 Mbit/s (packet size: 550bytes)













The BBU3900 implements OM management, signaling processing, and radio resource management of the entire eNodeB system and provides ports for data communication between 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 the BBU3900 and the RRUs.  Provides USB ports, which facilitate eNodeB upgrade when a USB disk is inserted into the 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 Uhigh space. It can be installed on an indoor wall, on the staircase, in the storeroom, or in an outdoor 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 and Transmission Unit (UMPT)  LTE BaseBand Processing unit (LBBP)  Fan module, that is, FAN  Power module, that is, Universal Power and Environment interface Unit (UPEU) Confidential Information of Huawei. No Spreading Without Permission












LMPT/UMPT The LTE Main Processing and Transmission Unit (LMPT) or the Universal Main Processing and Transmission Unit (UMPT) is the main control and transmission unit of the BBU3900. It manages 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 LTE separately. LBBP The LTE Baseband Processing Unit (LBBP) is the baseband processing unit of the BBU3900. It processes baseband signals and CPRI signals. FAN The FAN module controls the fan speed and monitors the temperature of the module. It dissipates heat for boards and modules of the BBU3900. UPEU The Universal Power and Environment interface Unit (UPEU) is the power module of the BBU3900. It converts +24 V DC or -48 V DC power into the power required for boards and modules of the BBU3900 and provides ports for transmission of external monitoring signals and eight dry contact signals. UTRP Universal transmission processing unit expands transmission capabilities.







Control Subsystem : The functions of the control subsystem are implemented by the LMPT/UMPT. This subsystem performs OM functions, processes signaling, and provides the 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 S1 and 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 the LMPT/UMPT and UTRP  Provides ports for communication between the eNodeB and the EPC  Provides the OM channel between the eNodeB and the Local Maintenance Terminal (LMT) or M2000  Provides ports for communication between the eNodeB and 2G/3G base stations so that the E1/T1 transmission resources can be shared by the eNodeB and the 2G/3G base stations





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 (or UMPT) board experiences a major fault, an active/standby switchover is automatically performed. An active/standby switchover can also be performed if a user runs the switchover command.  Operation and maintenance (O&M) channel backup The M2000 detects channel connectivity by employing the handshake mechanism at the application layer. If detecting that the active channel is disconnected, the M2000 instructs the eNodeB through the standby channel to perform a channel switchover. The eNodeB automatically switches from the route for the active channel to the route for the standby channel.  Route backup Route backup enhances transmission reliability by using a pair of primary 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 the secondary route.





Ports on the UMPTa2 Silkscreen

Connect Quan or Type tity

Function

FE/GE1 (optical port)

SFP

1

A 100 Mbit/s or 1000 Mbit/s adaptive Ethernet optical port is 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 Ethernet electrical port is used for transmitting service data and signaling messages.

USB(1)(2)

USB

1

(1)The USB port with the USB silkscreen is used for the software upgrade of a base station using a Universal Serial Bus (USB) storage device. This port also functions as a commissioning Ethernet port. (2)The USB port with the CLK silkscreen is used for multiplexing TOD and test clock.

E1/T1 port

DB26 female

1

The port is used for four E1/T1 signal inputs and outputs between the UMPT and the universal E1/T1 lightning protection unit (UELP) or between base station controllers.

GPS

SMA

1

The port is used for transmitting radio frequency (RF) signals received from the antenna to the satellite receiver.

CI

SFP

1

The port is used for BBU interconnection.

RST

-

1

Used for resetting the board.





DIP switch SW1 DIP Switch SW1



DIP Status

Description

1

2

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.

DIP switch SW2 DIP Switch

DIP Status

Description

1

2

3

4

SW2

OFF

OFF

OFF

OFF

Balanced

ON

ON

ON

ON

Unbalanced





 

Before accessing the base station through the ETH port, ensure that an OM port has been opened and the user has obtained required authorities for accessing the base station through 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 or exporting the base station configuration.





Indicators on the panel of the LBBP

Indicator Color RUN Green

ALM

ACT

Status Steady on Steady off

Description There is power supply, but the board is faulty. There is no power supply.

On for 1s and The board is functioning properly according to the off for 1s configuration. On for 0.125s The board is being loaded or configured, the board and off for is not started, or the board is running in a safety 0.125s version. Green Steady on An alarm is generated, and the board must be replaced. On for 1s and An alarm is generated, and the alarm may be off for 1s caused by another faulty board or port. Therefore, you need to locate the fault before deciding whether to replace the board. Steady off There is no fault. 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, it does not provide any services. On for 1s and The power supply for the board is insufficient. off for 1s Confidential Information of Huawei. No Spreading Without Permission






Cell and Antenna Configuration means the maximum specification supported by the LBBP. 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, 4T4R channel, 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 the specifications and load status of an LTE baseband processing unit (LBBP). This increases the usage of baseband resources and improves system reliability.  Inter-board cell reestablishment Inter-board cell reestablishment is designed to enable 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 board where the cell is established is faulty, the cell is reestablished on the other LBBP board, with a service interruption time shorter than 20s. Cold redundancy: RRUs are connected to two CPRI ports to form a ring topology. The two CPRI ports are provided by either one or two LBBP boards. If a CPRI port or LBBP board is faulty, the cell is reestablished, with a service interruption time shorter than 20s.





Indicators on the FAN module Indicator

STATE

Color

Green

Red

Status

Description

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.

ON

The module is reporting alarms.





Ports on the UPEU

Connect or Type

Silkscreen +24 V/-48V (UPEUa, UPEUb)



7W2

Function

Introducing +24 V or -48 V DC power

+24V/-48 V (UPEUc, UPEUd)

3V3

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

Introducing +24 V or -48 V DC power

Specifications of the UPEU Board UPEUa UPEUc UPEUa+UPEUc UPEUd

Output Power Backup Mode The output power of a UPEUa is 300 W. 1+1 backup The output power of a UPEUc is 360 W, and the output 1+1 backup power of two UPEUc boards is 650 W. The total output power of a UPEUa and a UPEUc is 360 W. The output power of a UPEUd is 650 W. 1+1 backup





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







Ports on UTRPb4 Silkscreen

Port

Quantity

Connector

E1/T1

E1/T1

2

DB26 connector

Ports on the panel of the UTRPc 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





Settings of SW1 on the UTRPb4 DIP Switch

DIP Status

Description

1

2

3

4

SW1

OFF

OFF

OFF

OFF

Balanced

ON

ON

ON

ON

Unbalanced

Others 

Unavailable

Settings of SW2 on the UTRPb4 DIP Switch

DIP Status

Description

1

2

3

4

SW2

OFF

OFF

OFF

OFF

Balanced

ON

ON

ON

ON

Unbalanced

Others 

Unavailable

Settings of SW3 on the UTRPb4 DIP Switch SW3

1 OFF ON ON

DIP Status 2 3 OFF ON ON OFF ON ON Others

Description 4 ON OFF ON

T1 The E1 resistance is set to 120 ohm. The E1 resistance is set to 75 ohm. Unavailable





Ports on the USCU Port

Connector

Description

GPS

SMA coaxial The GPS ports on the USCUb12 and USCUb21 receive GPS signals. connector The GPS port on the USCUb11 is reserved. It cannot receive GPS signals.

RGPS port

PCB welded The RGPS port on the USCUb11 receives RGPS signals. wiring terminal The RGPS ports on the USCUb12 and USCUb21 are reserved. They cannot receive 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 signals from the M1000 BITS port SMA coaxial Receiving BITS clock signals, supporting adaptive input of 2.048 MHz and connector 10 MHz clock reference source M-1PPS port



SMA coaxial Receiving 1PPS signals from the M1000 connector

Indicators on the TOD port

Color

Description

Default Configuration

Green If the indicator is steady on, the TOD The green indicator of the TOD0 port is off, and port is configured as an input port. the yellow indicator of the TOD0 port is on. Yellow If the indicator is steady on, the TOD The yellow indicator of the TOD1 port is Off, port is configured as an output port. and the green indicator of the TOD1 port is On.











E1/T1 Line Clock Synchronization  With an E1/T1 line clock, a base station obtains frequency synchronization signals from the physical layer of an E1/T1 link to achieve clock synchronization. An E1/T1 line clock can 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 which frequency synchronization packets are transmitted over IP. With clock over IP, only frequency synchronization is supported. When a base station uses this synchronization mode, the synchronization tolerance can be ±0.05 ppm. The ppm stands for parts per million. A clock over IP can be used when a base station works in IP over FE mode and an IP clock server is configured in the network. IP Clock (IEEE1588 V2) Synchronization  IEEE1588 V2 defines the Precision Time Protocol (PTP), which targets synchronization of clocks in the Ethernet, with the precision to microseconds. With an IEEE1588 V2 clock, both frequency synchronization and time synchronization are supported. An IEEE1588 V2 clock can be used when a base station works in IP over FE mode and an IP clock server is configured in the network. Synchronous Ethernet Clock Synchronization  With a synchronous Ethernet clock, a base station traces the upstream clock by recovering clock signals from the serial data bit streams received at the physical layer to achieve synchronization. In synchronous Ethernet, only frequency synchronization is supported, with the synchronization tolerance ±0.05 ppm. A synchronous Ethernet clock can be used when a base station works in IP over FE mode and the transport network supports the synchronous Ethernet clock. Confidential Information of Huawei. No Spreading Without Permission






The RF Unit implements the following functions  Receives downlink baseband data from the BBU and sends uplink baseband data for 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.









 







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 conduct voltage 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 total bandwidth between the maximum frequency and the minimum frequency of the spectrums for two 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 total bandwidth between the maximum frequency and the minimum frequency of the spectrums for two 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, or one 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 per carrier 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 per carrier is,  with a bandwidth of 5/10/15/20 MHz: 1*60W  with a bandwidth of 1.4/3 MHz: 1*40W Confidential Information of Huawei. No Spreading Without Permission










  

The RF system performs modulation, demodulation, data processing, combining, and splitting for baseband signals and RF signals. CPRI Module The CPRI receives downlink baseband data from the BBU and transmits uplink baseband data 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 by the other parts of the RRU. TRX The TRX provides two RX channels for uplink RF signals, two TX channels for downlink RF signals, 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 the RX signals and the TX signals to share the same antenna path. The duplexer also filters the RX signals and the TX signals. Confidential Information of Huawei. No Spreading Without Permission




LRFU Ports Silkscreen

Connector

Function

ANT_TX/RXB

DIN

ANT_TX/RXA

DIN

CPRI0

SFP female

Connected to the BBU or the upper-level cascaded MRFU

CPRI1

SFP female

Connected to the lower-level cascaded MRFU

PWR

3V3 power

Introducing power input

MON

RJ-45

RF TX/RX port, connected to the antenna system

Monitoring and maintaining port





MRFU Ports Port

Silkscreen

Connector

Function

ANT_RXB

DIN

RF RX port, connected to the antenna system

ANT_TX/ RXA

DIN

RF TX/RX port, connected to the antenna system

CPRI0

SFP female

Connected to the BBU or the upperlevel cascaded MRFU

CPRI1

SFP female

Connected to the lower-level cascaded MRFU

RX_INB

QMA female

Input port for diversity receive

RX_OUTA

QMA female

Output port for main receive

Power supply socket

PWR

3V3 power

Monitoring ports

MON

RJ-45

RF Port

CPRI interface

Inter-MRFU RF signal port

Introducing power input Monitoring and maintaining port





 

 









Remote radio units (RRUs) are used in a distributed base station to perform modulation, demodulation, data processing, and power amplification of baseband and radio frequency (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 20 MHz RRU3221/RRU3929/RRU3240/RRU3841 supports two carriers. The bandwidth per carrier 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 in the 1800MHz frequency Band RRU3908V2 supports one carrier with a bandwidth of 1.4/3/5/10/15/20 MHz bandwidth in the 900MHz frequency Band RRU3928/RRU3929/RRU3942 supports 2 carriers with a bandwidth of 1.4/3/5/10/15/20MHz











  

The RF system performs modulation, demodulation, data processing, combining, and splitting for baseband signals and RF signals. CPRI Module The CPRI receives downlink baseband data from the BBU and transmits uplink baseband data 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 by the other parts of the RRU. TRX The TRX provides two RX channels for uplink RF signals, two TX channels for downlink RF signals, 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 the RX signals and the TX signals to share the same antenna path. The duplexer also filters the RX signals and the TX signals. Confidential Information of Huawei. No Spreading Without Permission




RRU3201 Ports No

Item

Main TX/RX port

the

ANTC-TX/RX

Diversity TX/RX port

bottom

RET/MON TX RX CPRI0_E

2

Ports in the cabling cavity

TX RX CPRI_W RTN0(+) NEG0(-) RTN1(+) NEG1(-)

3

Description

ANTA-TX/RX

Ports at 1

Silkscreen

Indicators

Communication port of the RET antenna Eastbound and Westbound optical port

Main power supply socket

Power supply socket for cascading RRUs See next page







RRU3220 Ports No

Item

2

TX/RX port

the

ANTC-TX/RXB

TX/RX port

bottom

RET


Indicators

Communication port of the RET antenna

TX RX CPRI0

Optical/electrical port 0

TX RX CPRI1


RTN(+) NEG(-) EXT_ALM

3

Description

ANTA-TX/RXA

Ports at

1

Silkscreen

Power supply socket Port for alarm reporting See next page







RRU3222Ports No.

Item

2

TX/RX port

the

ANTC-TX/RXB

TX/RX port

bottom

RET


Indicators


TX RX CPRI0


TX RX CPRI1


RTN(+) NEG(-) EXT_ALM

3

Description

ANTA-TX/RXA

Ports at 1

Silkscreen

Power supply socket Port for alarm reporting See next page







RRU3808 Ports No.

Item

2

TX/RX port

the

ANTC-TX/RXB

TX/RX port

bottom

RET


Eastbound optical port

TX RX CPRI_W

Westbound optical port

RTN(+)0 NEG(-)0

NEG(-)1 Indicators


TX RX CPRI_E

RTN(+)1

3

Description

ANTA-TX/RXA

Ports at 1

Silkscreen

Main power supply socket

Power supply socket for cascading RRUs See next page







RRU3908 DC V1 Ports No.

Item

Ports at 1

the bottom

Silkscreen ANTA-TX/RXA

TX/RX port A

ANTC-TX/RXB

TX/RX port B

RET RX_IN/OUT

2

3


Indicators

Description

Communication port of the RET antenna Port for the inter-RRU RF cable

TX RX CPRI_E


TX RX CPRI_W


RTN(+) NEG(-)

Power supply socket

EXT_ALM

Port for alarm reporting

RST

Hardware reset button See next page







RRU3908 DC V2 Ports No.

Item

Ports at 1

the bottom


TX/RX port A

ANTC-TX/RXB

TX/RX port B

RET RX_IN/OUT

2

3


Indicators

Description


TX RX CPRI_E


TX RX CPRI_W


RTN(+) NEG(-)

Power supply socket

EXT_ALM


RST








RRU3908 AC V1 Ports No

1

Item

Ports at the bottom


TX/RX port A

ANTC-TX/RXB

TX/RX port B

RET RX_IN/OUT

AC-in DC-out

2

3


Indicators

Description


AC-in port on the AC/DC module of an RRU DC-out port on the AC/DC module of an RRU

TX RX CPRI_E


TX RX CPRI_W


RTN(+) NEG(-)

Power supply socket

EXT_ALM


RST








RRU3908 AC V2 Ports No.

Item

Ports at 1

the bottom


TX/RX port A

ANTC-TX/RXB

TX/RX port B

RET RX_IN/OUT

AC-in DC-out

2

3


Indicators

Description


AC-in port on the AC/DC module of an RRU DC-out port on the AC/DC module of an RRU

TX RX CPRI_E


TX RX CPRI_W


RTN(+) NEG(-)

Power supply socket

EXT_ALM


RST








RRU ports and indicators on the panels Item Ports at the bottom

Silkscreen Description ANT_TX/RXA TX/RX port A, supporting RET signal transmission ANT_RXC RX port C ANT_RXD Port RX port D ANT_TX/RXB TX/RX port B RX_IN/OUT RET


RTN(+) NEG(-) CPRI0 CPRI1 EXT_ALM

Port for the inter-RRU RF cable Communication port for the RET antenna, supporting RET signal transmission Power supply socket Optical/electrical port 0 Optical/electrical port 1 Port for alarm reporting





An RRU3240, which is a remote radio unit for LTE, supports a maximum of two carriers.











STMA (Smart Tower-mounted Amplifier) mode. In this mode, the distance between the RRU 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 BBU transfers 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 the cabinet. The STMA demodulates the OOK signals to RS485 signals and then supplies 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 is longer 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 BBU transfers that command to the RRU. The RRU transfer the DC power and the OOK signals to the SBT from the connector on top of the cabinet. The SBT demodulates the OOK signals to RS485 signals and then supplies the RS485 signals and part of the DC power to the RCU. Direct connection through multi-core cables. In this mode, the distance between the RRU and 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 BBU transfers that command to the RRU. The RRU modulates the command to RS485 signals, and then transfers the signals and the DC power to the RCU through multi-core cables.









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 electrical antenna. 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, and the phase shifter adjusts the antenna tilt. Interface RS485 functions as the control interface of the RCU. The SBT (Smart Bias-Tee) provides DC power supply and control commands through the feeder for the RCU. The SBT is installed on the RET antenna side. The SBT provides the following functions:  The SBT converts the control commands that are modulated with OOK by the feeder into the RS485 signals and transfers the signals to the RCU.  The SBT converts the RS485 signals from the RCU into OOK signals and transfers the signals to the feeder.  The SBT divides and sends the RF signals and control signals from the feeder to the antenna and the RCU.  The SBT transmits the direct current from the feeder to the RCU.









Components in the BTS3900A cabinet

Module

Optional or Mandatory

Max.Config Per Cabinet

RFU

Optional

6

The RFU performs modulation and demodulation between baseband signals and RF signals, processes data, and combines and divides signals.

RFU filler panel

Optional

6

To ensure proper ventilation of the cabinet, the slot in the RFU subrack that is not installed with an RFU 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 and enables interaction between the base station and the base station controller.

DCDU-01

Mandatory

1

The DCDU-01 provides DC power to all components in the cabinet.

Power equipment (DC/DC)

Mandatory

1

The power equipment (DC/DC) converts external +24 V DC power into –48 V DC power and provides power to all components in the cabinet.

Power equipment (AC/DC)

Optional

1

The power equipment (AC/DC) converts external 220 V AC single-phase, 220 V AC three-phase, and 110 V AC dual-live-wire power into –48 V DC and provides power to all components in the cabinet.

Remarks





Specification of BTS3900L cabinet Item Dimensions

Weight

Power Supply

Specification

Cabinet dimensions

1600mm(H)*600mm(W)*450(D)

Base dimensions

40mm(H)*600mm(W)*450(D)

empty cabinet

≤75Kg

Assembly cabinet

≤110kg

With full configuration

≤235kg

-48VDC

-48V(-38.4~-57V)

Power Consumption

≤5860W

Heat Consumption

≤5010W

Temperature

long 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 in front, no need to open the back door.





To meet requirements in different outdoor environments, multiple cabinets with different functions are provided by Huawei for distributed macro base stations. The Advanced Power module with heat exchanger (APM30H) 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) provides long-duration backup power for a base station. The Transmission Cabinet of 11 U high with heat exchanger (TMC11H) provides space for customer equipment.





 





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 provides space 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 and dissipates heat using a breathable film and fans. The APM30H can be configured in lowair-quality areas. The APM30H dissipates heat using a heat exchanger and outer and inner air circulation fans.





Components in the APM30H cabinet Module

1. Fan box

Optional or Mandatory Mandatory


Remarks

1

The fan box is configured with the fan, Hert Power Monitoring Interface unit (HPMI), and Central Monitoring Unit type A (CMUA). It is used to dissipate heat in the cabinet.

2. SLPU

Mandatory

2

Providing protection for trunk signals as a mandatory component. The SLPU is configured with 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 U space below the BBU. It contains two Universal Signal Lightning Protection unit 2 (USLP2s).

3. PSU (AC/DC)

Mandatory

3

The power supply unit (PSU) converts 110 V/220 V AC power into -48 V DC power.

1

The EPS provides functions of AC and DC power distribution for the cabinet. There are two types of EPSs, which are used in 110 V AC and 220 V AC power supply scenarios.

4. EPS subrack

Mandatory





Components in the IBBS200D cabinet

Module


Max. Config Per Cabinet

1. Fan box

Mandatory

2

The FAN is installed on the front door of the cabinet, dissipating heat in the cabinet.

1

The CMUA provides functions of temperature control, Boolean alarm detection, and ELU identification of the cabinet.

2. CMUA

Mandatory

Remarks

3. Power distribution box

Mandatory

1

The power distribution box is installed on the upper right of the cabinet, transferring and distributing power to the TEC or fan and to the batteries.

4. Battery

Mandatory

8

The battery provides long-duration backup power for a base station.





Components in the IBBS200T cabinet Module



1. TEC

Mandatory

1

The TEC is installed in the protecting hood for the TEC on the front door of the cabinet. The TEC consists of the TEC module, inner air circulation fan, outer air circulation fan, heatdissipation piece, and monitoring board.

2. CMUA

Mandatory

1

The CMUA provides functions of temperature control, Boolean alarm detection, and ELU identification of the cabinet.

3. Power Distribut ion box

Mandatory

1

The power distribution box is installed on the upper right of the cabinet, transferring and distributing power to the TEC or fan and to the batteries.

4. Battery

Mandatory

8

The battery provides long-duration backup power for a base station.

Remarks





  

The TMC can be configured when more space is required for transmission equipment. The cabinet, used outdoors, is small in size and easy to transport. The TMC dissipates heat through a breathable film and fans. The BBU3900 can be installed 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, as shown in B







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 heat in direct-ventilation mode. Configured with built-in battery groups, a BBC can provide a maximum of –48 V DC 184 Ah backup power.



  

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 fit for heights of RRUs.





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





To meet requirements in different outdoor environments, multiple cabinets with different functions are provided by Huawei for distributed macro base stations. The Advanced Power 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) provides long-duration backup power for a base station. The Transmission Cabinet of 11 U high with heat exchanger (TMC11H) provides space for customer equipment.





Components in the TMC11H cabinet

Module 1. DCDU01

2. Fan box

3. RFU


Mandatory

Mandatory

Mandatory

Max. Config/ Cabinet

Remarks

1

The Direct Current Distribution Unit01 (DCDU-01) is a DC power distribution unit supplying power to each component in the RFC.

1

The fan box is configured with the fan and CMUA. The fan dissipates heat in the cabinet, and the CMUA provides the functions of the temperature control, Boolean alarm detection, and ELU identification of the cabinet.

6

The RFU, a Radio Frequency Unit, performs the functions such as modulation and demodulation between baseband signals and RF signals, data processing, and signal combination and division.









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 10 MHz, 2T2R" indicates that the eNodeB is configured with three cells of 10 MHz bandwidth, and each cell uses two TX channels and two RX channels. Besides, UMPT, LBBPb , LBBPd1, LBBPd2, 2TX4RX or 4TX4RX RRU and other RFU can be used for the specific configurations.









Different quality of RFUs or RRU will be configured according to the specific types of RRUs or RRUs with different quality of antenna ports.





Different quality of RFUs or RRU will be configured according to the specific types with different quality of antenna ports.



Topology Advantage Star •Transmission reliability is high. When an RRU or an optical fiber is faulty, only the related sector is affected. •Installation and maintenance are easy. Chain The chain topology reduces the cost for optical fibers.

Loadsharing

Disadvantage Remarks RRUs cannot be cascaded when RRUs can be connected to any the star topology is used. CPRI ports on the LBBPc or LBBPd when the star topology is used.

•The number of cascading levels and cascading distances are restricted. •Faults in an upper-level RRU may affect lower-level RRUs.

•RRU3232s cannot be cascaded. •A maximum of four RRU3251s can be cascaded. •RRUs to be cascaded must have the same CPRI data rate. •Transmission reliability •Two optical fibers must be If the LBBPc is used, a 20 MHz improves. connected to one RRU. 8T8R cell is supported only •Wider transmission •The inter-board load-sharing when the load-sharing bandwidth can be topology requires two LBBPc or topology is used. achieved with two optical LBBPd boards. fibers. •RRUs cannot be cascaded when the load-sharing topology is used.









Star topology  Advantage: Each eNodeB is connected directly to the MME through the transport network. Therefore, this simple topology features easy engineering, maintenance, and capacity expansion; 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 are relatively 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 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 the secondary route. Operation and maintenance (O&M) channel backup 





The M2000 detects channel connectivity by employing the handshake mechanism at the application layer. If detecting that the active channel is disconnected, the M2000 instructs the eNodeB through the standby channel to perform a channel switchover. The eNodeB automatically switches from the route for the active channel to the route for the standby channel. Confidential Information of Huawei. No Spreading Without Permission




Common transmission with IP (Back Plane)  In this figure, A, B, and C are the three Site Units of the MBTS connected through backplane.









The MBTS can achieve route backup by using common transmission with IP, which enables backup 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 an independent physical transmission port, this independent transmission link is the main channel for each SiteUnit.  Backup channel: When the main control boards of two SiteUnits are interconnected by using FE/GE ports, each SiteUnit's independent transmission link serves as a backup channel for the other SiteUnit. FE stands for fast Ethernet and GE stands for gigabit Ethernet. Under normal circumstances, the GBTS and NodeB use their own independent transmission links (main channels) to transmit data. No impact exists between the GBTS and NodeB in terms of transmission. If the main channel of the NodeB is faulty, the backup channel will be used and the NodeB's data is transferred to the GTMU board over the FE interconnection cable. Moreover, the transmission link of the GBTS (the backup channel) will be used to ensure that high-priority maintenance and service data will not be affected. After the main channel of the NodeB is restored, the system automatically switches back to the main channel to transmit data.







The UMTS traffic is transmitted on one path whereas the LTE traffic is transmitted on different paths

Both UMTS traffic and LTE traffic are transmitted on different paths






eNodeB LTE FDD V100R005 Product Description Confidential Information of Huawei. No Spreading Without Permission

Recommend Documents