Huawei Gsm Bts3900 Hardware Structure-20080728-Issue4.0

2008-07

www.huawei.com

HUAWEI Confidential

Security Level: Internal Use

HUAWEI BTS3900 Hardware Structure

ISSUE4.0

Wireless Case and Training

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 2

The BTS3900 developed by Huawei is an indoor macro BTS.

The BTS3900 mainly consists of the BBU and DRFUs.

Compared with traditional BTSs, the BTS3900 features simpler

structure and higher integration.

In this slide, we’ll mainly introduce the hardware system

structure, basic functions of modules and networking mode of

the BTS3900.


Know the functions and features of BTS3900

Master the Hardware structure and function of BTS3900

Master the Network topologies of BTS3900


BTS3900 Product Description （ V300R008_03)

BTS3900 Hardware Description （ V300R008_03)

BTS3900 Installation Guide （ V300R008_02)


Chapter 1 BTS3900 System DescriptionChapter 1 BTS3900 System Description

Chapter 2 BTS3900 Hardware Structure

Chapter 3 BTS3900 Network Topology


Location

PSTN ISDN

PSPDN

Um Interface

BTS3900

BTS3900

BTS3900

BTS

OMC

HLR/AUC/EIR

BSC

MSC/VLR

SMC/VM

A Interface

MAP

MAP

TUP,ISUPMS

MS

MS

MS: Mobile Station BTS: Base Transceiver Station BSC: Base Station Controller

HLR: Home Location Register AUC: Authentication Center EIR: Equipment Identity Register

MSC: Mobile Switching Center VLR: Visitor Location Register SMC: Short Message Center

VM: Voice Mailbox OMC: Operation and Maintenance Center DBS ： Distributed Base Station


Chapter 1 BTS3900 System Description

Chapter 2 BTS3900 Hardware StructureChapter 2 BTS3900 Hardware Structure

Chapter 3 BTS3900 Network Topology


Component

Board/Module Full Name Parts in a Single Cabinet

Full Configuration Minimum Configuration

BSBC Universal BBU Subrack Backplane type C (2U)

1 1

UEIU Universal Environment Interface Unit ≥3 1

GTMU GSM Transmission and Management Unit for the BBU

1 1

UELP Universal E1/T1 Lightning Protection Unit

0 0

UBFA Universal BBU Fan unit type A (2U) 1 1

UPEU Universal Power and Environment interface Unit

2 1

DRFU Double Radio Filter Unit 6 1

DCDU-01 Direct Current Distribution Unit 1 1

GATM GSM Antenna and TMA Control Module 1 0

PMU Power and Environment Monitoring Unit 1 0

PSU (AC/DC) Power Supply Unit (AC/DC) 3 0

PSU (DC/DC) Power Supply Unit (DC/DC) 4 0

FAN Box FAN Box 1 1


Section 1 System Structure

Section 2 Hardware Component

Section 3 DRFU Work Mode


BTS3900 Cabinet

Cabinet size: H×W×D=900mm×600mm×450mm

Base size: H×W×D=400mm×600mm×420mm

Weight: 57kg(empty) /142kg(full configuration)


BTS3900 Cabinet Structure

Fully configured cabinet (-48VDC) Fully configured cabinet (+24VDC) Fully configured cabinet (~220VAC)


BTS3900 Cabinet Structure

Stacked cabinets in full configuration (-48VDC)

Stacked cabinets in full configuration (~220VAC)

Stacked cabinets in full configuration (+24VDC)


BTS3900 Logical Structure






BTS3900 ComponentsBTS 3900 Hardware consists of :

BBUDRFUDCDU-01GATMPMUPSUFAN BOX


BBU Logical Structure


BBU Hardware Structure

The typical power consumption of the BBU is 50 W.

The BBU is a small box with all the external ports on the front panel.

The BBU3900 boards consist of the BSBC, UEIU, GTMU, and UELP; the

BBU3900 modules consist of the UBFU and the UPEU.


BBU Board--BSBC

The BSBC is the backplane of the BBU. The BSBC provides eight

board slots, two power slots, and one fan slot. The universal BBU sub-rack backplane type C (2U) (BSBC) provides

backplane interfaces for communication between boards and supplies

power for boards. The GTMU is located in slots 5 and 6, slot 7 for a main control board

that supports 3G, and other ports are as common slots.


BBU Board--GTMU

The GSM transmission, timing, and management unit for BBU

(GTMU)

controls and manages the entire BTS. It provides interfaces related to

the reference clock, power supply, OM, and external alarm collection. The GTMU performs the following functions:Controls, maintains, and operates the BTS.Supports fault management, configuration management, performance management, and security management.Supports the monitoring of the fan module and power supply module.Distributes and manages BTS3900 clock signals.Provides clock input for testing.Provides port for terminal maintenance.Supports four E1 inputs.Provides CPRI ports for communication with the RF modules .


BBU Board--GTMUPorts on the Panel

Port Type Description

CPRI0–CPRI5

SFP connector

Provides the input and output of optical and electrical transmission signals

ETH RJ45 connector

Local maintenance and commissioning

FE0 RJ45 connector

A reserved port that performs the following function:Connects the BBU to a routing device in the equipment room through the Ethernet cable to transmit network information

FE1 DLC connector

A reserved port that performs the following function:Connects the BBU to a routing device in the equipment room through the optical cable to transmit network information

USB USB connector

A reserved port that performs the following function:Automatically upgrades the software through the USB disk

TST USB connector

Testing of the output clock signals by using a tester

E1/T1 DB26 male connector

Provides the input and output of the four E1/T1 signals between the GTMU and the UELP or between the GTMU and the BSC.


BBU Board--GTMULEDs on the board

LED Color Status Description

RUN Green On The board is faulty.

Off There is no power supply or the board is faulty.

Blinking once every two seconds The board is operational.

Blinking once every four seconds The OML link is abnormal.

Blinking four times per second The board is loading software.

ALM Red On A fault occurs in the running board.

Off An alarm is not generated.

ACT Green On The board is operational.

Off The board is faulty.

LIU0–LIU3 Green On A local E1/T1 alarm is generated.

Blinking four times per second A remote E1/T1 alarm is generated.

Off This link is not used or the alarm is cleared.

CPRI0–CPRI5

Green On The CPRI link is functional.

Red On The reception of the optical module is abnormal and an alarm is generated.


BBU Board--GTMU DIP Switch

DIP Switch DIP Status Description

1 2

SW1 ON ON The E1 impedance is set to 75 Ω.

OFF ON The E1 impedance is set to 120 Ω.

ON OFF The T1 impedance is set to 100 Ω.

DIP Switch DIP Status Description

1 2 3 4

SW2 ON ON ON ON The E1 cable is grounded.

OFF OFF OFF OFF The E1 cable is not grounded.


BBU Board--GTMU DIP Switch

DIP Switch

DIP Status Description

1 2 3 4

SW4 ON ON ON ON The E1 link can be bypassed.

OFF OFF OFF OFF The E1 link cannot be bypassed.

DIP Switch

DIP Status Description

1 2 3 4

SW5 ON ON ON ON The E1 link cannot be bypassed.

OFF ON ON OFF The E1 link of the Level 1 cascaded BTS can be bypassed.

ON OFF ON OFF The E1 link of the Level 2 cascaded BTS can be bypassed.

OFF OFF ON OFF The E1 link of the Level 3 cascaded BTS can be bypassed.

ON ON OFF OFF The E1 link of the Level 4 cascaded BTS can be bypassed.

OFF ON OFF OFF The E1 link of the Level 5 cascaded BTS can be bypassed.


BBU Module--UBFA

The universal BBU fan unit type A (2U) (UBFA) communicates with

the

GTMU to regulate the temperature, adjust the fan speed, and report

alarms. The UBFA module is hot swappable.

Label Color Status Description

STATE Green 0.125s ON, 0.125s OFF

The module is not registered, and no alarm is reported.

1s ON, 1s OFF The module is running properly.

Red ON The module is reporting an alarm.


BBU Module--UPEU

The universal power and environment interface unit (UPEU)

supports the –48V/ +24V DC power input, supplies power to the

boards, modules, and fan in the BBU, and provides access to

multiple environment monitoring signals. The UPEU performs the following functions:

Converting -48V or +24V DC to +12V DC that is applicable to the boards.Providing two RS485 signals and eight dry contact alarms.Providing reverse connection protection for power cable connectors.

UPEA UPEB


BBU Module--UPEU

Ports on the Panel

Label Connector Description

PWR 3V3 +24 V/-48 V DC power input

EXT-ALM1 RJ45 Transmitting eight dry contact alarms

EXT-ALM0 RJ45

MON1 RJ45 Transmitting two RS485 environment monitoring signals

MON0 RJ45


BBU Board--UEIU

The universal environment interface unit (UEIU) supports multiple

environment monitoring signals. The UEIU supports eight Boolean

alarm signals and two RS485 environment monitoring signals. The UEIU is optional. It is configured when the environment interfaces

are insufficient.Label Conne

ctorDescription

EXT-ALM1

RJ45 Transmitting eight dry contact alarms

EXT-ALM0

RJ45

MON1 RJ45 Transmitting two RS485 environment monitoring signals

MON0 RJ45


BBU Board—UELPThe universal E1/T1 lightning protection unit (UELP) provides lightning

protection for four E1/T1 signals.

Port Type Cable Description

INSIDE DB25 male connector

E1 transfer cable of the BBU

Transfers the four E1/T1 signals between the UELP and the GTMU

OUTSIDE DB26 male connector

E1/T1 cables of the BBU

Provides the input and output of the four E1/T1 signals between the BBU and the BSC

The UELP has one DIP switch, which is used to set the impedance on the

E1/T1 port. There are four DIP bits on the DIP switch. DIP Switch DIP Status Description

1 2 3 4

S1 ON ON ON ON Applied to 75-ohm E1 cables in unbalanced mode.

OFF OFF OFF OFF Applied to other cases instead of 75-ohm E1 cables in unbalanced mode.


BBU Cable connection

The BBU3900 cables are classified into the PGND cable, -48VDC

power cable, E1/T1 cable, E1 transfer cable, environment monitoring

signal cable, CPRI signal cable between the BBU and the RRU, and

BBU monitoring signal cable. The cable connection relations of the BBU are as follows:


BBU Cables

The cables figure of the BBU

-48VDC power cables E1 transfer cable

FE cable CPRI optical cable


DRFU Logical StructureThe DRFU performs modulation and demodulation between baseband

signals and RF signals, processes data, and combines and divides

signals.The DRFU consists of the high-speed interface unit, signal processing

unit, power amplifier, and dual-duplexer.


DRFU Board Ports on the panel

Type Connector Ports Description

Port for transceiving RF signals

N female connector ANT1 Used in connection to the antenna subsystemANT2

CPRI port SFP female connector

CPRI0 Used in connection to the BBU, or in connection to the upper-level cascaded DRFU

CPRI1 Used in connection to the lower-level cascaded DRFU

Port for transmitting RF signals between DRFUs

QMA female connector

RX1 in Input port for diversity signals in antenna channel 1

RX1 out Output port of diversity signals in antenna channel 1

RX2 in Input port for diversity signals in antenna channel 2

RX2 out Output port of diversity signals in antenna channel 2

Power port 7W2 power connector

PWR Receives power input


DRFU BoardLEDs on the Board

LED Status Meaning

RUN On The power input is normal, but the BBU is faulty.

Off There is no power supply or the module is faulty.

Blinking once every two seconds

The module is functional.

Blinking four times per second The module is loading software or is not started.

ALM On A fault alarm is generated.

Off No alarm is generated.

ACT On The module is functional and is correctly connected to the BBU.

Off The connection with the BBU is not established.


The DRFU is being tested on the Site Maintenance Terminal.


DRFU BoardLEDs on the Board

LED Status Meaning

VSWR Off (red) No VSWR alarm is detected.

Blinking once every two seconds (red)

The VSWR alarm is generated on only the ANT2 port.

Blinking four times per second (red)

The VSWR alarms are generated on the ANT1 and ANT2 ports.

On (red) The VSWR alarm is generated on only the ANT1 port.

CPRI0 On (green) The CPRI link is functional.

On (red) The interface module fails to receive signals.


The CPRI link has a loss-of-lock error.

CPRI1 On (green) The CPRI link is functional.

On (red) The interface module fails to receive signals.


The CPRI link has a loss-of-lock error.


GATM ModuleThe GSM antenna and TMA control module (GATM) is a module

that controls the antenna and TMA. The GATM is optional.

The GATM performs the following functions:Controls the RET antenna

Feeds power to the TMA

Reports the RET control alarm signals

Monitors the current from the feeder


GATM ModulePorts on the panel

Ports Connector Function

ANT0 SMA female connector

Providing power for the RET antenna and transmitting control signals for the RET antenna


Providing power for the antenna









COM1 RJ45 connector Used in connection to the BBU

COM2 RJ45 connector Providing the extended RS485 port to be cascaded with other devices

-48 V 7W2 power connector

Receiving the -48 V power input


GATM ModuleLEDs on the board

LED Color Description Status Meaning

RUN Green Indicator of the board running status

Blinking once every four seconds

There is power supply but the communication with the BBU is abnormal.


The board is running normally and the communication with the BBU is normal.

Off There is no power supply or the module is faulty.

ACT Green Indicator of the service running status

On The AISG link is normal.

Off The AISG link is abnormal.

Blinking frequently and irregularly

The AISG link is transmitting data.

ALM Red Alarm indicator

On An alarm is generated, such as an over-current alarm.

Off The module runs normally.


DCDU-01 ModuleThe direction current distribution unit (DCDU-01) provides -48V DC

power of 10 outputs.The functions of the DCDU-01 are:

Receiving -48 V DC power input.Distributing the -48 V DC power of 10 outputs for boards and modules in

the cabinet.Providing surge protection of 10 kA in differential mode and 15 kA in

common mode and providing dry contact for surge protection failure.


DCDU-01 ModulePanel of the DCDU-01 (10 outputs)

Name Label Description

Power input terminal

NEG(-) DCDU-01 low level input terminal

RTN(+) DCDU-01 high level input terminal

Power output port

SPARE2, SPARE1, BBU, FAN, and RFU5-RFU0

Power ports supplying the 10 outputs of power to the BBU, DRFU, GATM, and fan box

Power switch

SPARE2, SPARE1, BBU, FAN, and RFU5-RFU0

Power switch controlling the 10 outputs for the BBU, DRFU, GATM, and fan box

Alarm output port

SPD ALM Dry contact alarm output port


PSU ModuleThe Power Supply Unit (PSU) converts the ~220V AC or +24V DC

power into the -48V DC power.

The PSU (AC/DC) has the following functions:Converts the 220 V AC power into the -48 V DC power.

Monitors alarms related to module faults (such as output over-voltage,

no output, and fan faults), alarms related to module protection (such

as over-temperature protection, and input over-voltage/under-voltage

protection), and power failure alarm.

Monitors the charging and discharging of the batteries.

The PSU (DC/DC) has the following functions:Converts the +24 V DC power into the -48 V DC power.

Monitors alarms related to module faults (such as output over-voltage,

no output, and fan faults), alarms related to module protection (such

as over-temperature protection, and input over-voltage/under-voltage

protection), and power failure alarm.


PMU ModuleThe PMU manages the power supply and batteries. The PMU is

the core of the power monitoring system. The PMU performs the following functions:

Communicates with the central processing unit through the RS232/RS422

serial port.Manages the power system and the battery charging and discharging.Detects and reports water damage alarms, smoke alarms, door status

alarms, and standby Boolean value alarms; reports ambient humidity and

temperature, battery temperature, and standby analog values.Detects power distribution and reports alarms, and also reports dry

contact alarms.

(1) LEDs (2) Power supply test ports

(3) RS232/RS422 ports (4) Battery control switch

(5) COM port -(1) Backplane port (2) DIP switch


PMU ModulePorts on the panel

Ports Function

RS232/RS422 port

Used in communication with the central processing unit.

Battery switch The battery switch has two control ports ON and OFF, which are used for switching on and switching off the battery.Press and hold the port ON for 5-10 seconds to switch on the battery.Press and hold the port OFF for 5-10 seconds to switch off the battery.

Power supply test port

Two power supply test holes -48V and 0V are available for measurement through an ordinary multi-meter.

COM port Used in connection to the external signal transfer board.

Backplane port

Used in connection to the backplane.


PMU ModuleLED on the module


RUN Green On for 1s and off for 1s

The module is functional, and the communication with the central processing unit is normal.

On for 0.125s and off for 0.125s

The module is functional, but the communication with the central processing unit fails.

On steady or off steady

The module is faulty if it is not in the power-on self-check state.

ALM Red On The following alarms are generated:Mains overvoltage or undervoltage alarmBusbar overvoltage or undervoltage alarmOvercurrent alarm during chargingBattery power-off alarmBattery circle circuit broken alarmAmbient temperature alarmAmbient humidity alarmWater immersion alarmSmoke alarmPower module alarmLoad power-off alarm



PMU ModuleDIP Switch

Bit 3 Bit 2 Bit 1 Bit 0 Monitoring Address

0 0 0 0 0000

0 0 0 1 0001

0 0 1 0 0010

0 0 1 1 0011

0 1 0 0 0100

0 1 0 1 0101

0 1 1 0 0110

0 1 1 1 0111

1 0 0 0 1000

1 0 0 1 1001

1 0 1 0 1010

1 0 1 1 1011

1 1 0 0 1100

1 1 0 1 1101

1 1 1 0 1110

1 1 1 1 1111


FAN BoxThe fan box regulates the temperature at the air inlet of the cabinet

and in the fan box. It can adjust the rotation speed of the fans to

implement ventilation and dissipation for the cabinet.The fan box performs the following functions:

Provides forced ventilation and dissipation for the cabinet.Supports two modes of adjusting the rotation speed of the fans:

adjustment based on the temperature and adjustment controlled by the

central processing unit.Detects the temperature.Communicates with the central processing unit to report alarms and the

adjusted rotation speed of the fans based on the temperature to the

central processing unit.Stops the rotation of the fans when the ambient temperature is low.


FAN BoxPorts on the panel

Type Silk-Screen

Connector Description

Power port -48 V 3V3 power connector

Used to introduce the -48 V DC power

Temperature sensor port

SENSOR RJ45 connector Used in connection to the external temperature sensor

Communication port

COM OUT RJ45 connector Used in connection to the lower-level cascaded fan box

COM IN RJ45 connector Used in communication with the central processing unit


FAN BoxLEDs on the panel


RUN Green Blinking four times per second

The communication with the central processing unit is not established but the module runs normally.


The communication with the central processing unit is established and the module runs normally.

Off There is no power input and the module is faulty.

ALM Red Blinking once every two seconds

An alarm is generated.







BTS3900 Configuration Principles Configuration Principles of the BBU

Minimum number of trunk cables. You can determine the number of trunk cables as

required, and take the existing configuration for saving transmission resources into

account in networking.

Minimum number of UPEUs. The configuration of a single UPEU is recommended.

The redundancy backup mode can be configured if required.

One BBU supports six CPRI ports. The star topology is recommended between

DRFUs.


BTS3900 Configuration Principle Configuration Principles of DRFU

A single DRFU does not support the S1/1 application; however, three DRFUs

support the S3/3 application.

The cell configuration of S4 and lower configurations use a single antenna, the

configurations of S5 to S8 use a double antenna, and the configurations of S8 to

S12 use a triple antenna.

The non-combination configuration is recommended for the DRFU to avoid the

power loss in combination and to reduce the power consumption of the BTS.


DRFU Internal Structure2 TRXs and 2 duplexers are integrated in DRFU module which can be

connected to antenna directly.The RX_IN/OUT port of DRFU can support the receiving signal

interconnection between 2 DRFUs, so that it can support the diversity

receiving between 2 DRFUs.


DRFU Antenna ModeSingle antenna, double receivers

The DRFU module has 1 working TX/RX feeder and 2 way receive diversity, one

of the receiver is from the another DRFU.

Double antennasThe DRFU module has 2 working TX/RX feeders and 2 way receive diversity.

Double antennas, 4 receiversThe DRFU has 2 working TX/RX feeders and 4 way receive diversity.


DRFU Transmit and Receive Mode DRFU transmit mode

Transmit independency or combining

PBT

Transmit diversity

DRFU receive mode Two way receive diversity

Four way receive diversity


DRFU Transmit Mode--Transmit Independency or Combining Transmit Independency

Transmit Combining

Interface Processing U

nit

DUP

DUP

CPRI0

CPRI1

ANT1

ANT2


nit

DUP

DUP

CPRI0

CPRI1

ANT1

ANT2


DRFU Transmit Mode--PBT

In PBT mode, only the first TRX can work.

PBT mode can improve the transmitting power.

In PBT mode ， only channel A is used by downlink signal.


nit

DUP

DUP

CPRI0

CPRI1

ANT1

ANT2


DRFU Transmit Mode--Transmit Diversity

In this mode, only the first TRX can work

Transmit diversity mode improves the quality of downlink signal

In this mode ， the signal from the first TRX is divided into 2 channels and be

transmitted through channel A and channel B.


nit

DUP

DUP

CPRI0

CPRI1

ANT1

ANT2


DRFU Receive Mode-- Two Way Receive Diversity In this mode ， both of the 2 TRXs can work

Each TRX receives the signal from 2 feeders

In the following figure ， the TRX gets the receiving signal from channel A

and B of the single DRFU

It is also possible for TRX to use the channel A receiver of another DRFU

CPRI0

CPRI1


nit

DUP

DUP

ANT1

ANT2

RX-IN

RX_OUT

From RX-in, TRX can also use the channel A of the other DRFU, so

channel B of the two DRFUs are canceled.


DRFU Receive Mode-- Four Way Receive Diversity In this mode, only the first TRX can work.

The working TRX gets the uplink signal from 4 feeders of 2 DRFUs.

CPRI0

CPRI1


nit

DUP

DUP

ANT1

ANT2

RX-IN

RX_OUT

2 channels from the other DRFU.


Chapter 1 BTS3900 System Description

Chapter 2 BTS3900 Hardware Structure

Chapter 3 BTS3900 Network TopologyChapter 3 BTS3900 Network Topology


BTS3900 Topology BTS Topology

The topologies of the BTS are classified into star, chain, tree, and ring topologies.

E1/T1 cable can be used between BBU and BSC or transmission equipment,

Optical and LAN cable can be used between BBU and route equipment.

DRFU Topology The BBU and DRFUs support multiple network topologies such as star, chain, and

ring topologies.

Only optical fiber can be used between DRFU and BBU.


BTS Topology The topologies of the BTS are classified into star, chain, tree, and ring

topologies. Star mode Tree mode

Chain mode Ring mode


DRFU Topology The BBU and DRFUs support multiple network topologies such as star, chain, and ring topologies.


Summary

BTS3900 Function and Features

BTS3900 Hardware Structure, such as BBU and DRFU etc.

BTS3900 Network Topology

Thank You

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Huawei Gsm Bts3900 Hardware Structure-20080728-Issue4.0

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