Huawei Gsm-r Bts3900 Hardware Structure-20141204-Issue4 0

2008-07

www.huawei.com

HUAWEI Confidential

Security Level: Internal Use

HUAWEI GSM-R 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 MRFUd.

Compared with traditional BTSs, the BTS3900 features simpler

structure and higher integration.

In this slide, well 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 DescriptionV301R013)

BTS3900 Hardware DescriptionV301R013)

BTS3900 Installation GuideV301R013)


Chapter 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

TUP,ISUP MS

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 DBSDistributed Base Station


Component

Board/Module Full Name Parts in a Single Cabinet

Full Configuration Minimum Configuration

UEIU Universal Environment Interface Unit 3 1

GTMU GSM Transmission and Management

Unit for the BBU

1 1

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

UPEU Universal Power and Environment

interface Unit

2 1

MRFUd Double Radio Filter Unit 6 1

DCDU Direct Current Distribution Unit 1 1

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

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential

INDOOR BTS3900 Ver.D

Page 10


BTS3900 Logical Structure


BTS3900 Components

BTS 3900 Hardware consists of :

BBU

DRFU

DCDU

PMU

PSU

FAN BOX


BBU Logical Structure


BBU Hardware Structure

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

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

modules consist of the UBFU and the UPEU.


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--GTMU

Ports 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


Connects the BBU to a routing device in the equipment room through

the optical cable to transmit network information

USB USB

connector


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--GTMU LEDs 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.

LIU0LIU3 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 .

OFF ON The E1 impedance is set to 120 .

ON OFF The T1 impedance is set to 100 .


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

ctor

Description

EXT-

ALM1

RJ45 Transmitting eight dry contact

alarms

EXT-

ALM0

RJ45

MON1 RJ45 Transmitting two RS485

environment monitoring

signals

MON0 RJ45


BBU BoardUELP The 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.


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


MRFUd Logical Structure

The MRFUd performs modulation and demodulation between baseband

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

signals.

The MRFUd consists of the high-speed interface unit, signal processing

unit, power amplifier, and dual-duplexer.

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential

Appearance and Interfaces

Page29

Interface type

Connectors type

quantity

instruction

RF interface

DIN

2

for connecting the antenna feeder system

RF receipt signal interconnection interface

QMA female

2

for RF module interconnection

CPRI interface

SFP female

2

for connecting to BBU3900

power interface

3V3

1

-48V power input

monitor interface

RJ45

1

monitor and maintenance CPRI interface capacity item quota

CPRI interface quantity 2

CPRI interface rate 1.25Gbit/s or 2.5Gbit/s

supporting CPRI networking

mode

binary star mode


MRFUd Board

LEDs 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.


seconds

The MRFUd is being tested on the Site

Maintenance Terminal.


MRFUd Board

LEDs on the Board

LED Status Meaning

VSWR Off (red) No VSWR alarm is detected.


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.


seconds (red)

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.


seconds (red)

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


DCDU Module

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

power of 10 outputs.

The functions of the DCDU 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 Module

Panel of the DCDU (10 outputs)

Name Label Description

Power

input

terminal

NEG(-) DCDU low level input terminal

RTN(+) DCDU 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, MRFUd, and fan box

Power

switch

SPARE2, SPARE1, BBU,

FAN, and RFU5-RFU0

Power switch controlling the 10 outputs for the

BBU, MRFUd, and fan box

Alarm

output port

SPD ALM Dry contact alarm output port


PSU Module

The 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 Module The 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 Module Ports 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 Module LED 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 alarm

Busbar overvoltage or undervoltage alarm

Overcurrent alarm during charging

Battery power-off alarm

Battery circle circuit broken alarm

Ambient temperature alarm

Ambient humidity alarm

Water immersion alarm

Smoke alarm

Power module alarm

Load power-off alarm



PMU Module DIP 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 Box The 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 Box

Ports 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 Box

LEDs 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.

Blinking

once every

two

seconds

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 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.

MRFUd Topology

The BBU and MRFUd support multiple network topologies such as star, chain, and

ring topologies.

Only optical fiber can be used between MRFUd 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


Summary

BTS3900 Function and Features

BTS3900 Hardware Structure, such as BBU and MRFUd etc.

BTS3900 Network Topology

Thank You

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Huawei Gsm-r Bts3900 Hardware Structure-20141204-Issue4 0