huawei bts3012 hardware structure

8/20/2019 HUAWEI BTS3012 Hardware Structure

1/86

HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

www.huawei.com

Internal

OME201102 HUAWEI BTS3012

Hardware Structure

ISSUE 1.0


2/86

HUAWEI TECHNOLOGIES CO., LTD. Page 2All rights reserved

Upon completion of this course, you will be able to:

Know the functions and features of BTS

Master the BTS hardware structure

Master the cable connection of BTS


3/86


References

BTS3012 Technical Manual

BTS3012 Installation Manual

BTS3012 User Manual


4/86


Chapter 1 OverviewChapter 1 Overview

Chapter 2 System ComponentsChapter 2 System Components

Chapter 3 Signal ProcessingChapter 3 Signal Processing

Chapter 4 Antenna and Feeder SystemChapter 4 Antenna and Feeder System

Chapter 5 Typical configurationChapter 5 Typical configuration


5/86


Location

OMC: Operation and Maintenance CenterVM: Voice Mailbox

SMC: Short Message CenterVLR: Visitor Location RegisterMSC: Mobile Switching Center

EIR: Equipment Identity RegisterAUC: Authentication CenterHLR: Home Location Register

BSC: Base Station ControllerBTS: Base Transceiver StationMS: Mobile Station

PSTN

ISDNPSPDN

Um Interface

BTS3012

BTS3012

BTS3012

BTS3012

OMC

HLR/AUC/EIR

BSC

MSC/VLR

SMC/VM

A Interface

MAPM A P

TUP,ISUPMS

MS

MS


6/86


Features and Functions

Support GSM800M、850M、900M、1800M、1900M

Support networking topology includes star, tree, chain and ring

Support A5/1 and A5/2 encryption/decryption

Support GPRS and EDGE

Support dynamic and static power control

Support the omni-directional coverage and directional

coverage


7/86


Features and Functions

Double Transceiver Unit (DTRU). A single cabinet can support

up to 12 carriers. It can smoothly evolve into WCDMA Transmit diversity, 4-receive diversity

Support Power Boost Technology (PBT)

BTS3012 can share cabinet with WCDMA base station. The

module of WCDMA base station can be inserted in the

BTS3012 cabinet

Support more various transmission mode includes E1, STM-1,

microwave, and satellite transmission

The DTRU of the BTS3012 can be inserted into

BTS30/BTS312 with -48V DC power supply


8/86








9/86


Hardware structure

TMA TMA

DTRU DAFU

Antenna and feeder

subsystem

Forepart of RF

Subsystem

TMA TMA

DTRU DAFU

TMA TMA

DTRU DAFU

Double transceiversubsystem

DATU

Um Interface

DATU

fiber

E1

Abis Interface

M

E

L

C

Common subsystem

NFCB

Metro 100

DTMU

DEMU

E1

BITSMonitor

TBUS/DBUS/CBUS

MS

FH _BUS

Extension

cabinet


10/86


BTS3012 Cabinet and BoardsD D D D

Wiring & Air Inlet

Wiring

DDPU

D

COM

D

COM

DDPU

D

COM

D

TRU

D

TRU

D

TRU

D

TRU

D

TRU

D

TRU

Wiring

FAN

Air Inlet

MLC

Power andEMC

Transmission Unit

D

DPU

ELC

ELC

SAC

Transmission Unit

DTM

U

DTM

U

DEM

U

DC

CU

DC

SU

DA

TU


11/86


BTS3012 Cabinet and Boards

NodeB Fan Controlling and monitoring BoardFAN Box

Cabinet Top Backplane for DTRU BTSDCTB

Environment Monitoring Unit for DTRU BTSDEMUCombined cabinet Signal connection Unit for DTRU BTSDCSU

Signal Access Card for DTRU BTSDSAC

E1 Signal Lightning-Protection Card for DTRU BTSDELC

Monitor Signal Lightning-Protection Card for DTRU BTSDMLC

Antenna and TMA Control Unit for DTRU BTSDATU

Combining Unit for DTRU BTSDCOM

Dual Duplexer Unit for DTRU BTSDDPU

Antenna Front-end Unit for DTRU BTSDAFU

Cable Connection Unit for DTRU BTSDCCUTransmission & Timing & Management Unit for DTRU BTSDTMU

Double Transceiver UnitDTRU

DescriptionAbbreviations


12/86


Common Subsystem

DTMU Transmission timing& management unit for DTRU BTS

DEMU Environment Monitoring Unit for DTRU BTS

DCSU Combined cabinet Signal connection Unit for DTRU

BTS

DCCU Cable Connection Unit for DTRU BTS

DATU Antenna and TMA control unit for DTRU BTS


13/86


Functions of DTMU

Providing the external GPS input, the BITS synchronized clock

input Providing 4-route or 8-route E1 input，backup between the

active and standby boards

Providing local MMI maintenance of the 10 M network port

Controlling, maintaining, and operating the BTS

Providing fault management, configuration management,

performance management, and security management

Supporting 8-route digital alarm input. Two routes are lightningarrester failure alarm detection


14/86


Structure of DTMU

MCK

OML

DBUS

CBUS2

Clock

BIU DTRU

DTMU

BSC

MCUMMI

LMT

Abis

External

synchronizedclockSubrack number

and clock


15/86


Indicators on DTMU

E1 port 1 remote end alarm occurs when SWT is outE1 port 5 remote end alarm occurs when SWT is on

Fast flash (4 Hz)

E1 port 1 near end alarm occurs when SWT is outE1 port 5 near end alarm occurs when SWT is on

On

E1 port 1 is normal when SWT is outE1 port 5 is normal when SWT is on

OffIndicates thetransmission

status of E1port 1 and

port 5

GreenLIU1

LockFast flash (1 Hz)

Pull-inFast flash (4 Hz)

Free-runOn

AbnormalOffIndicates theclock status

GreenPLL

ActiveOn

StandbyOffIndicateswhether theboard isactive or

standby

GreenACT

Power failure of the boardOff

BSC data loadingFast flash at uncertainintervals

NormalSlow flash (0.5 Hz)

OML is blockedSlow flash (0.25 Hz)Indicatesoperation

GreenRUN

MeaningStatusDescriptionColorIndicator

RUN

ACT

PLL

LIU1

LIU2

LIU3

LIU4

SWT

ALM

RST

MMI

T2M

FCLK

T13M

DTMU


16/86


Hardware alarmOn

No hardware alarmOffAlarm indicatorsRedALM

LIU1 to LIU4 indicate the transmission status of E1 port5 to 8.

On

LIU1 to LIU4 indicate the transmission status of E1 port1 to 4.

OffIndicates handoverstatus of E1

GreenSWT

E1 port 4 remote end alarm occurs when SWT is out

E1 port 8 remote end alarm occurs when SWT is on

Fast flash (4

Hz)

E1 port 4 near end alarm occurs when SWT is outE1 port 8 near end alarm occurs when SWT is on

On


OffIndicates thetransmission status of

E1 port 4 and port 8

GreenLIU4


Fast flash (4Hz)

E1 port 3 near end alarm occurs when SWT is out

E1 port 7 near end alarm occurs when SWT is onOn


OffIndicates thetransmission status ofE1 port 3 and port 7

GreenLIU3


Fast flash (4Hz)

E1 port 2 near end alarm occurs when SWT is out

E1 port 6 near end alarm occurs when SWT is on

On

E1 port 2 is normal when SWT is out

E1 port 6 is normal when SWT is onOffIndicates the

transmission status ofE1 port 2 and port 6

GreenLIU2


Indicators on DTMU

RUN

ACT

PLL

LIU1

LIU2

LIU3

LIU4

SWT

ALM

RST

MMI

T2M

FCLK

T13M

DTMU


17/86


Interface on the DTMU panel

Near end maintenance network portRJ45MMI

13M primary reference clockSMB (female)T13M

216.7 Hz frame clockSMB (female)FCLK

Outputs reference testing clockSMB (female)T2M

DescriptionTypeInterface


18/86


Functions of DEMU

The DEMU is placed in slots 2 to 4 and slot 7 of the common subrack with

the DATU. The DEMU is an optional module. There is maximum one

DEMU under full configuration.

Monitoring variations in the smoke, water, temperature, humidity, infrared,

and access control ,Handling alarms

Guaranteeing normal operation of the equipment Output of 6-route Boolean value and input of 32-route main node alarms

DMLC DEMU

CBUS3Monitor signal


19/86


Functions of DCSU

The Combined Cabinet Signal

Connection Unit for DTRU BTS(DCSU) is placed in slot 5 of the

common subrack, which is

located in the lower part of the

cabinet. There is only one DCSU

and it is mandatory

The DCSU transfers signals for

the combined cabinet and cabinet

group between the commonsubrack and the cabinet top

subrack

DCMB

DTMU

DCSU

DTRB

DCTB

DCCU

DEMU

DATU


20/86


The interfaces on the DCSU panel

CC_IN

CC_OUT

TO_DTRB

TOP2

DCSU

Connecting to the cabinet top subrack throughcables

DB26 (female)TOP2

Connecting to the DTRB through cablesMD64 (female)To_DTRB

For cable input to the combined cabinetMD64 (female)CC_IN

For cable output from the combined cabinetMD64 (female)CC_OUT

DescriptionTypeSilk- Screen


21/86


GM51DCSU VERBSW6

SW9

SW14

SW13

SW12

SW7

SW10

SW8

SW5

SW4

SW3

SW11

SW2

SW1

Switch of DCSU


22/86


Functions of DCCU

The DCCU is placed in slot 6 of

the common subrack. There isonly one DCCU and it is

mandatory

Converting the input and output

signals of the common subrack.

Inputting the power of the

common subrack

Providing EMI filtering

DCMB

DTMU

DCCU

NFCB

DCTB

DCSU

DEMU

DATU


23/86


The interfaces on the DCCU panel

POWER

DCCU

To_FAN

TO_TOP1

TRAN

For power input of the common unit3V3POWER

Connects to the cabinet top subrack through

cables

MD64

(female)TO_TOP1

Connects to the fan panel through cablesDB26(female)

To_FAN

For E1 signal inputMD64(female)

TRAN

DescriptionTypeSilk-

Screen


24/86


Functions of DATU

The DATU is placed in slots 2 to 4 and slot 7 of the

common subrack with the DEMU. It is optional and

there are maximum two DATUs

Transmitting the remote electrical tilt unit (RET)

control signals

Feeding the TMA Communicating with the DTMU through CBUS3 for

control and alarm report

DATU

RUN

ACT

ALM

ANT0

ANT1

ANT2

ANT3

ANT4

ANT5


25/86


Cabinet Top Access Subsystem

DMLC( Monitor Signal Lightning-Protection Card for DTRU BTS)

DELC(E1 Signal Lightning-Protection Card for DTRU BTS)

DSAC(Signal Access Card for DTRU BTS)

D

M

L

C

D

E

L

C

D

E

L

C

D

S

A

C

D C F

C K B 2

C K

B 1


26/86


Function of DMLC

The DMLC is placed in slots 0 to 2 of the cabinet top

subrack with the DELC. There is only one DMLC and

it is optional DMLC

Thirty-two-route Boolean value input

Six-route Boolean value output

Four-route analog input

Smoke/water/access

control/infrared/humidity/temperature sensor signal

input

SWIN

SWOUT

DMLC

AIN


27/86


Function of DELC

The DELC is placed in slots 0 to 2 of the cabinet

top subrack with the DMLC

The DELC is mandatory and there is one DELC

under minimum configuration

Without the DMLC, there are maximum three

DELCs, supporting up to 12 routes of protected E1signals

DELC

TR


28/86


Function of DSAC

The DSAC is placed in slot 3 of the cabinet top

subrack. There is only one DSAC and it is mandatory

Six-route Boolean value input.

Two-route CBUS3 output

Two-route input of lightning protection arrester failure

alarm

Access protection of BITS clock input

DSAC

C

O M 1

E A C

S

Y N C

C O M 2

S 1 + S 1 - S 2 + S 2 -


29/86


Double transceiver subsystem

DTRU（Double Transceiver Unit）

DTRB

DTRB

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU


30/86


Functions of DTRU

RF subsystem transmit part. Converts the basband signals on the two

TRXs to the RF signals. Supports up-frequency conversion of the signals

and RF frequency hopping.Filters, amplifies, and outputs the combined

signals

RF subsystem receive part.Devides and modulates the RF signals on the

two TRXs.Supports transmit receive and RF frequency hopping Baseband processing part.Processes signals.Supports coding and

decoding, interleaving and de-interleaving, modulation and

demodulation.Supports voice fax services.Supports data services in

Phase II, GPRS services, and EDGE services.Supports transmit diversityand 4-way receive diversity.Amplifies the output power


31/86


Functional structure of DTRU

DTRU Baseband and RF Unit (DBRU)

DTRU Power Amplifier Unit (DPAU)

DTRU Power Supply Unit (DTPS)

DTMU

DTPS

DTRU

- 48V DC

DPAU

DBRUDAFU


32/86


Indicators on DTRU

RL alarmSlow flash (0.5 Hz)

NormalOff

Standing wave alarmOnRF interfaceindicators

RedRF_IND

The board is normal.Off

Critical alarm occurs to the board.On (including

high-frequencyflash)

Indicates alarmRedALM

Only parts of the logic channels are working

normally (including after TRX mutual aid).

Slow flash (0.5Hz)

Communication between DTRU and DTMU isnot set up

Off

The board is running (the DTMU sendsconfiguration parameters to the DTRU

correctly and the cell is starting). All thechannels on the two carriers can worknormally.

OnIndicates the TRX isworking

GreenACT

The DTMU is sending configuraiton

parameters to the DTRU.Fast flash (2.5 Hz)

The board is running.Slow flash (0.5 Hz)

The board is starting.Slow flash (0.25Hz)

There is no power supply and the board is

faulty.Off

There is power supply or the board is faulty.OnIndicates the runningand power-on of the

DTRU

GreenRUN

MeaningStatusDescriptionColorIndicator DTRU

TX1

IN1

TCOM

IN2

TX2

RSTRUN

ACT

ALM

RF_IND

PWR

RXM1

RXD1RXM2

RXD2


33/86


Indicators on DTRU

Power supply3V3PWR

Diversity receive port of carrier 2 or Diversity 4 receive port of

carrier 1

SMA (female)RXD2

Main receive port of carrier 2 or Diversity 3 receive port of carrier 1SMA (female)RXM2

Diversity 1 or 2 receive port of carrier 1SMA (female)RXD1

Main or diversity 1 receive port of carrier 1SMA (female)RXM1

TX2 output signals:

Output to the forepart of the RF when not in combiner

Output to IN2 in combiner

N (male)TX2

Connects to TX2 in combinerSMA (female)IN2

Combines and outputs IN1 and IN2 or implements PBT combined

output

N (male)TCOM

Connects to TX1 in combinerSMA (female)IN1

TX1 output signals:

Output to the forepart of the RF when not in combiner

Output to IN1 in combiner

N (male)TX1

DescriptionTypeInterface DTRU

TX1

IN1

TCOM

IN2

TX2

RSTRUN

ACT

ALM

RF_IND

PWR

RXM1

RXD1

RXM2

RXD2


34/86


DTRU transmit mode

Transmit independence

Transmit diversity PBT

Wideband transmit combination


35/86


DTRU transmit mode-transmit independence

TCOM

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner


36/86


DTRU transmit mode-transmit diversity

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Man made multi way

combinercombiner


37/86


DTRU transmit mode-PBT

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Same phase

combinercombiner


38/86


DTRU transmit mode-wideband transmit combination

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1TCOM

IN2

TX2

combinercombiner


39/86


DTRU receive mode

Receive independence

Receive diversity

4-way receive diversity


40/86


DTRU receive mode- Receive independence

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

dividerdivider

combinercombiner

dividerdivider


41/86


DTRU receive mode- Receive diversity

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider


42/86


DTRU receive mode- 4-way receive diversity

TRX0TRX0

TX

TRX1TRX1

TXdividerdivider

dividerdivider

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner


43/86


Intra structure of DTRU

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider


44/86


Functions of DTRB

The DTRB is placed in the DTRU

subrack. It has six slots, each

holding one DTRU

The DTRB provides connections

between the DCSU and the DTRU.

All the onsite signals are provided to

the DCSU through the DTRB

DTRB

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU


45/86


Front-End of the RF Subsystem

DDPU (Dual Duplexer Unit for DTRU BTS)

DCOM (Combining Unit for DTRU BTS)

NBBI

D

C

O

M

D

D

P

U

D

C

O

M

D

D

P

U

D

C

O

M

D

D

P

U

1 2 3 4 50


46/86


Functions of DDPU

The DDPU is intermixed with the DCOM in the DAFU subrack

of the forepart of RF subsystem. It is indispensable. Generally,

the number of DDPU is one at least and three at most. Without

the DCOM, there can be at most six DDPUs

Sending multi RF signals from the transceiver in the DTRU to

the antenna through the duplexer

Sending signals from the antenna after amplifying and

quartering them to the transceiver in the DTRU

Detecting standing wave alarms in the Antenna Feeder system

Receiving the gain control of the low noise amplifier


47/86


Functional structure of the DDPUANTB

TXA

TXB

RXA4

duplexerduplexer dividerdivider duplexerduplexer dividerdivider

ANTA

RXA1

RXA2RXA3

RXB1

RXB2RXB3RXB4


48/86


Indicators on DDPU

No standing wave alarm occur to Channel BOff

Standing wave critical alarm occurs toChannel B

On

Standing wave alarm occurs to Channel BSlow flash (0.5 Hz)Indicates a standingwave alarm of ChannelB

RedVSWRB

No standing wave alarm occurs to Channel AOff

Standing wave critical alarm occurs to

Channel AOn

Standing wave alarm occurs to Channel ASlow flash (0.5 Hz)Indicates a standingwave alarm of Channel

A

RedVSWRA

The board is starting or loading the newest

application programsSlow flash (0.5 Hz)

No faultOff

There is alarm(including standing wave alarm)

and the board is faulty.

On (including high-

frequency flash)

Indicates an alarmRedALM

The DTMU is sending configurationparameters to the DDPU or the DDPU is

loading software programs.

Fast flash (2.5 Hz)

The board is running normally.Slow flash (0.5 Hz)

There is no power supply or the board is

faulty.Off

There is power supply and the board is faulty.OnIndicates the DDPU isrunning and powerd on

GreenRUN


RUN

ALMVSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTA

ANTB


49/86


Interface on DDPU

RF jumper portDIN (female)ANTB

RF jumper portDIN (female)ANTA

Diversity 4 output portSMA (female)RXB4Diversity 3 output portSMA (female)RXB3

Diversity 2 output portSMA (female)RXB2

Diversity 1 output portSMA (female)RXB1

Main 4 output portSMA (female)RXA4




Input of the TX signals sent from the DTRUInput of the DCOM combining signals

N (male)TXB

Input of the TX signals sent from the DTRUInput of the DCOM combining signals

N (male)TXAPower supply input3V3POWER

Sends to the DDPU control signals, communication signals,

clock signals and subrack number

DB26

(female)COM


RUN

ALMVSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTA

ANTB


50/86


Functions of DCOM

The DCOM is placed in the DAFU subrack

with the DDPU

The DCOM is optional and there are a

maximum three DCOMs. The DTRU

combines two carriers into one channel. The

DCOM is required when the DTRUs are

insufficent

The DCOM combines the 2-route DTRU

transmission signals and outputs them to the

DDPU

DCOM

TX-COM

TX2

TX1

ONSHELL


51/86


Interfaces on DCOM

TX signal input from the DTRU to DCOMN (male)TX2

TX signal input from the DTRU to DCOMN (male)TX1

Output of combining signals from the DCOM

to DDPU

N (male)TX—

COM

For indentification of the board type of DCOM

and on-site status

DB26

(female)

ONSHEL

L



52/86


Functions of FAN BOX

The FAN BOX forms a loop with the air inlet box to provide forced

ventilation and dissipation for the common subrack, the DTRU subrack,

and the DAFU subrack

The FAN Box is mandatory with four independent axial flow fans. The

fans' speed and running status are controlled by the Fan Controlling and

Monitoring Board

FANSTATE

COM

PWR


53/86


Indicators on FAN BOX

There is no power supply and the

board is faulty

OffGreen or red or

orange

The board software is being ungradedOnOrange (red

and green)

The board is running normallySlow flash (0.5

Hz)

Green

Alarm occurs to the boardFast flash (4 Hz)Red

Communication between the NFCB

and the DTMU is abnormal. There is

no alarm

Fast flash (4 Hz)GreenSTATE

MeaningStatusColorIndicator


54/86








55/86


System Signal Flow

the signal flow of the service and signaling includeDL Signal Flow

UL Signal Flow

Signaling Processing Signal Flow

Clock Signal Flow

Combined Cabinet Signal Flow


56/86


DL Signal Flow

DD

PU

Um

BSC

BTS3012 Cabinet

MSAntennaFeeder

Abis

DT

RU

DTMU


57/86


DL Signal Flow

The DL signal flow includes the following steps:

The DTMU receives the service data from the BSC,

exchanges and processes it, and then transfers it to the

DTRU

The DTRU performs digital filtering, up conversion, and

filter amplification of the signals and sends the signals tothe DDPU

The duplexer in the DDPU filters the signals sent from the

DTRU and transmits the signals through antennas and

feeders


58/86


UL Signal Flow

DA

FU

Um

BSC

BTS3012 Cabinet

MSAntennaFeeder

Abis

DT

RU

DTMU


59/86


UL Signal Flow

The UL signal flow includes the following steps:

The antenna receives the signals transmitted from the MS. After being

amplified by the TMA, the signals are transmitted to the DDPU through

the feeder.The TMA is optional. It is used to compensate the feeder loss

and enhance receiver sensitivity of the DDPU antenna port

The DDPU receives the signals and transmits the signals to the DTRUafter they are filtered by the duplexer and amplified by the LNA

The DTRU receives the signals and transmits the signals to the DTMU

after amplification and down conversion. The DTMU then transmits the

signals to the BSC through the Abis interface


60/86



BTS3012

DDPUDTRUDTMU

BSCAbis


61/86



The signaling processing signal flow includes the following steps:

The Abis interface board receives the signaling data from the BSC

and transmits the data to the DTMU

The DTMU performs decision and processing on the signaling and

transmits the signaling to the DTRU and DDPU

The DTRU and DDPU report board status to the DTMU

The DTMU obtains the status of the BTS3012 by collecting and

analyzing the status of all boards and transmits the information to

the BSC through the Abis interface


62/86


Clock Signal Flow

DTMUBoards in main

cabinet

Boards in slavecabinet

A-bis

Clock distributioncable between

cabinets


63/86


Clock Signal Flow Description

The clock signal flow includes the following steps:

The external reference clock is transmitted to the clock

module in the DTMU through the Abis interface

The clock module performs phase lock and frequency

division on the clock signals to generate different clock

signals for BTSs The clock signals are transmitted to the modules in the

main cabinet such as the DTRU and the DDPU

The clock signals are transmitted to the modules in the

slave cabinets through the clock distribution cable


64/86








65/86


Antenna Feeder subsystem

Antenna

TMA

Antennasupport

Jumper

JumperFeeder

Jumper

AntennaFeeder

JumpersTMA


66/86


Antenna In mobile communications systems, the antenna consists of an

array of element antennas, as shown in Figure

Element

antenna

Feeding

network

Antenna

connector

Directional antenna Omnidirectional antenna

Feeding

network

Element

antenna

Feeding

network

Antennaconnector


67/86


Antenna

BTS3012 antennas are classified:

By radiation features in horizontal directions: omnidirectional

antennas and directional antennas

By polarization features: single polarization antennas and dual

polarization antennas

Omnidirectional

antennaSingle p olarization

antenna

Dua l polarization

antenna


68/86


Lightning Arrester is used to

prevent the equipment from being

damaged by the lightening current

inducted by the core line of the

feeder

feeder

jumper

Lightning Arrester

Lightning Arrester


69/86


Types of Main Feeder

7/8 inch

Cable loss=0.043dB/m

5/4 inch

Cable loss=0.032dB/m

1/2 inch jumper

Cable loss=0.11dB/m

Used between the antenna and the main feeder

Between the antenna and the tower-top amplifier

Between the cabinet and the lightning arrester


70/86


TMA

The tower mounted amplifier (TMA) is a low noise amplification module

installed on the tower top. The TMA is optional. The triplex TMA is usually

used and installed close to the antenna. The triplex TMA consists of triplexfilter, low noise amplification, and feeder

Lowernoise

amplific-ation

Sending

filter

Receivingfilter

Bypass

DC

BTS

TMA

Feeder

Receivingfilter


71/86


Antenna Pattern

The antenna pattern describes the radiating abilities of

antennas in all directions

360°

Omni Antenna Directional antenna

120° 90° 65°


72/86


Polarization Two main types of polarization

Vertical polarization

Horizontal polarization

The types of antenna divided by

polarization

Single polarized antenna

− Vertical polarization for GSM

− One port for one feeder

Dual polarized antenna− +45 degree and -45 degree

− Two ports for two feeders


73/86








74/86


Configuration Principles

The configuration principles of the BTS3012 cabinet are as follows:

The minimum antenna rule

use as few as possible antennas for cell configuration.

The minimum cabinet rule

use as few as possible cabinets for cell configuration.

The complete synchronous cell ruleall TRXs of a synchronous cell are configured in the same cabinet group

The basic cabinet priority rule

TRXs are configured in the basic cabinet in preference, and the number

of TRXs in the basic cabinet is not less than that in any extension cabinet


75/86


Configuration Principles

The BTS3012 supports the omnidirectional coverage and the directional

coverage.

The BTS3012 supports the combination of two cabinets to form one group

and the combination of three cabinet groups.

The BTS3012 supports the transmit diversity and 4-way diversity receive.

The DCOM combines two carriers into one channel (the two-into-onefunction). The DCOM is required when the DTRUs are not sufficient.

The BTS3012 uses DTRU. One single cabinet supports up to 12 TRXs in

full configuration.

The maximum number of carriers is eight in a cell with a pair of dual

polarization antennas or two omnidirectional antennas of a single

sectorized cell

Typical configuration S1/1/1


76/86


yp g

（transmit independence mode）

S1/1/1 transmit independence mode，

Each cell is configured one DTRU and

one DDPU.

The connection for one cell is showed

in the right slide

BSC data configuration should be ：

transmit independence mode ，receive

independence mode

Cabinet Top power（dBm）：（46 or

47.8）-1.0

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1



77/86


yp g

（transmit diversity+4-way receive diversity）

S1/1/1 transmit diversity+4-way

receive mode，each cell is

configured one DTRU and twoDDPU


transmit diversity mode

4-way receive mode

Cabinet Top power（dBm）：

（46 or 47.8）-1.0

DTRU

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

Typical configurationS2/2/2


78/86


yp g

（transmit independence mode）

S2/2/2 transmit independence mode，

Each cell is configured one DTRU and

one DDPU

The connection for one cell is showed in

the right slide


transmit independence mode ，receive

diversity mode


47.8）-1.0

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

Typical configurationS2/2/2


79/86


yp g

（PBT mode）

S2/2/2 PBT mode，each cell is

configured two DTRU and oneDDPU

The connection for one cell is

showed in the right slide


PBT mode

receive independence mode

Cabinet Top power（dBm）：49

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1



80/86


（ wideband transmit combination mode）

S4/4/4 wideband transmit combination

mode ，each cell is configured two

DTRU and one DDPU


wideband transmit combination

mode ，receive diversity mode


47.8）-3.3-1.0

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1


81/86


Typical Configuration S1/2/1

S1/2/1,cell1 and cell 3 need

share one DTRU, cell 2 need

configure one DTRU and oneDDPU.

BSC data configuration

should be ：

DTRU1：transmit

independence mode，receive

independence mode；

DTRU2：transmit

independence mode ，

receive independence

diversity mode DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1


82/86



S8/8/8 cell 1 and cell 3

are configured 4

DTRU,2 DCOM and 1DDPU


should be ：wideband

transmit combination

mode ，receive diversity

mode

Cabinet top power

（dBm）：（46 or 47.8）

-3.3-3.3-1.0DTRU

TX 1

TCOM

TX 2

IN2

IN 1

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com



83/86


S8/8/8 cell2 is

configured 4 DTRU,2

DCOM and 2 DDPU, cell

2 need cross the cabinet


should be：wideband

transmit combinationmode ，receive diversity

mode

Attention：only support

frequency hopping

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3RXB4

TX A

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

RF-EX1

RF-EX2

RF-EX3

RF-EX4

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3RXB4

TX A

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

RF-EX1

RF-EX2

RF-EX3

RF-EX4


84/86


Combined Cabinet Signal Flow

The connection of the signal cables of the combined cabinet is as

follows:The main and slave cabinets are connected by the data cables,

control cables, and clock cables

The main and slave combined cabinets are connected by the clock

cables and control cablesThe main and slave cabinets and combined cabinets require the

DIP switches

Slave

cabinet

of main

cabinet

group

Main

cabinet

of main

cabinet

group

Main

cabinet

of

slave

cabinet

group

Slave

cabinet

of

slave

cabinet

group

Data cable

Clock cable

Control cable

Clock cable

Control cableData cable

Clock cable

Control cable


85/86


Functions and features of BTS3012

BTS3012 hardware structure

Antenna and feeder system

Typical configuration

SummarySummary


86/86

www.huawei.com

Thank You

huawei bts3012 hardware structure

Documents