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OME201102 HUAWEI BTS3012

Hardware Structure

ISSUE 1.0


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


References

� BTS3012 Technical Manual

� BTS3012 Installation Manual

� BTS3012 User Manual


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


Location

OMC: Operation and Maintenance CenterVM: Voice Mailbox

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

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

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

PSTN ISDN

PSPDN

Um Interface

BTS3012

BTS3012

BTS3012

BTS3012

OMC

HLR/AUC/EIR

BSC

MSC/VLR

SMC/VM

A Interface

MAPM

AP

TUP,ISUPMS

MS

MS


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


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


Hardware structure

TMA TMA

DTRU DAFU

Antenna and feedersubsystem

Forepart of RFSubsystem

TMA TMA

DTRU DAFU

TMA TMA

DTRU DAFU

Double transceiver

subsystem

DATU

Um Interface

DATU

fiber

E1

Abis Interface

MELC

Common subsystem

NFCB

Metro 100

DTMU

DEMU

E1

BITSMonitor

TBUS/DBUS/CBUS

MS

FH_BUS

Extension

cabinet


BTS3012 Cabinet and BoardsD D D D

Wiring & Air Inlet

Wiring

DDPU

DCOM

DCOM

DDPU

DCOM

D

TRU

D

TRU

D

TRU

D

TRU

D

TRU

D

TRU

Wiring

FAN

Air Inlet

MLC

Power andEMC

Transmission Unit

DDPU

ELC

ELC

SAC

Transmission Unit

DTM

U

DTM

U

DEM

U

D

C

CU

D

C

SU

D

A

TU


BTS3012 Cabinet and Boards

NodeB Fan Controlling and monitoring Board FAN Box

Cabinet Top Backplane for DTRU BTSDCTB

Environment Monitoring Unit for DTRU BTSDEMU

Combined 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 BTSDCCU

Transmission & Timing & Management Unit for DTRU BTSDTMU

Double Transceiver UnitDTRU

DescriptionAbbreviations


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


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 lightning

arrester failure alarm detection


Structure of DTMU

MCK

OML

DBUS

CBUS2

Clock

BIUDTRU

DTMU

BSC

MCUMMI

LMT

Abis

External

synchronizedclockSubrack number

and clock


Indicators on DTMU

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

Fast flash (4 Hz)

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

On

�E1 port 1 is normal when SWT is out �E1 port 5 is normal when SWT is on

OffIndicates the transmission

status of E1 port 1 and

port 5

GreenLIU1

LockFast flash (1 Hz)

Pull-inFast flash (4 Hz)

Free-runOn

AbnormalOffIndicates the

clock statusGreenPLL

ActiveOn

StandbyOff Indicates whether the board is

active or

standby

GreenACT

Power failure of the boardOff

BSC data loadingFast flash at uncertain

intervals

NormalSlow flash (0.5 Hz)

OML is blockedSlow flash (0.25 Hz)Indicates

operationGreenRUN

MeaningStatusDescriptionColorIndicator

RUN

ACT

PLL

LIU1

LIU2

LIU3

LIU4

SWT

ALM

RST

MMI

T2M

FCLK

T13M

DTMU


Hardware alarmOn

No hardware alarmOffAlarm indicatorsRedALM

LIU1 to LIU4 indicate the transmission status of E1 port

5 to 8.On

LIU1 to LIU4 indicate the transmission status of E1 port

1 to 4.OffIndicates handover

status of E1GreenSWT

�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)


On

�E1 port 4 is normal when SWT is out�E1 port 8 is normal when SWT is on

OffIndicates the transmission status of

E1 port 4 and port 8

GreenLIU4


Fast flash (4

Hz)

�E1 port 3 near end alarm occurs when SWT is out

�E1 port 7 near end alarm occurs when SWT is on

On

�E1 port 3 is normal when SWT is out�E1 port 7 is normal when SWT is on

OffIndicates the transmission status of


GreenLIU3


Fast flash (4

Hz)


On

�E1 port 2 is normal when SWT is out

�E1 port 6 is normal when SWT is on

OffIndicates the

transmission status of


GreenLIU2


Indicators on DTMU

RUN

ACT

PLL

LIU1

LIU2

LIU3

LIU4

SWT

ALM

RST

MMI

T2M

FCLK

T13M

DTMU


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


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


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 common

subrack and the cabinet top

subrack

DCMB

DTMU

DCSU

DTRB

DCTB

DCCU

DEMU

DATU


The interfaces on the DCSU panel

CC_IN

CC_OUT

TO_DTRB

TOP2

DCSU

Connecting to the cabinet top subrack through cables

DB26 (female)TOP2

Connecting to the DTRB through cablesMD64 (female)To_DTRB

For cable input to the combined cabinet MD64 (female)CC_IN

For cable output from the combined cabinetMD64 (female)CC_OUT

DescriptionTypeSilk- Screen


GM51DCSU VERBSW6

SW9

SW14

SW13

SW12

SW7

SW10

SW8

SW5

SW4

SW3

SW11

SW2

SW1

Switch of DCSU


Functions of DCCU

� The DCCU is placed in slot 6 of

the common subrack. There is

only 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


The interfaces on the DCCU panel

POWER

DCCU

To_FAN

TO_TOP1

TRAN

For power input of the common unit3V3 POWER

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


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


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

DC

F

CK

B2

CK

B1


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


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 E1

signals

DELC

TR


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

CO

M1

EA

CS

YN

CC

OM

2S

1+

S1

-S2

+S

2-


Double transceiver subsystem

� DTRU（Double Transceiver Unit）

� DTRB

DTRB

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU


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 diversity

and 4-way receive diversity.Amplifies the output power


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


Indicators on DTRU

RL alarmSlow flash (0.5 Hz)

NormalOff

Standing wave alarmOnRF interface

indicatorsRedRF_IND

The board is normal.Off

Critical alarm occurs to the board.On (including

high-frequency

flash)

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 is

not set upOff

The board is running (the DTMU sends configuration parameters to the DTRU

correctly and the cell is starting). All the channels on the two carriers can work

normally.

OnIndicates the TRX is

workingGreenACT

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 (0.25

Hz)

There is no power supply and the board is

faulty.

Off

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

DTRU

GreenRUN

MeaningStatusDescriptionColorIndicator DTRU

TX1

IN1

TCOM

IN2

TX2

RST

RUN

ACT

ALM

RF_IND

PWR

RXM1

RXD1

RXM2

RXD2


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

RST

RUN

ACT

ALM

RF_IND

PWR

RXM1

RXD1

RXM2

RXD2


DTRU transmit mode

� Transmit independence

� Transmit diversity

� PBT

� Wideband transmit combination


DTRU transmit mode-transmit independence

TCOM

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner


DTRU transmit mode-transmit diversity

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Man made multi way

combinercombiner


DTRU transmit mode-PBT

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Same phase

combinercombiner


DTRU transmit mode-wideband transmit combination

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

combinercombiner


DTRU receive mode

� Receive independence

� Receive diversity

� 4-way receive diversity


DTRU receive mode- Receive independence

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

dividerdivider

combinercombiner

dividerdivider


DTRU receive mode- Receive diversity

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider


DTRU receive mode- 4-way receive diversity

TRX0TRX0

TX

TRX1TRX1

TXdividerdivider

dividerdivider

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner


Intra structure of DTRU

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider


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


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


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


Functional structure of the DDPU

ANTB

TXA

TXB

RXA4

duplexerduplexer dividerdivider duplexerduplexer dividerdivider

ANTA

RXA1

RXA2RXA3

RXB1

RXB2RXB3RXB4


Indicators on DDPU

No standing wave alarm occur to Channel BOff

Standing wave critical alarm occurs to

Channel BOn

Standing wave alarm occurs to Channel BSlow flash (0.5 Hz)Indicates a standing

wave alarm of Channel

B

RedVSWRB

No standing wave alarm occurs to Channel AOff

Standing wave critical alarm occurs to

Channel A

On

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

A

RedVSWRA

The board is starting or loading the newest

application programs

Slow 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 configuration

parameters 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 is

running and powerd onGreenRUN


RUN

ALM

VSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTA

ANTB


Interface on DDPU

RF jumper portDIN (female)ANTB

RF jumper portDIN (female)ANTA

Diversity 4 output portSMA (female)RXB4




Main 4 output portSMA (female)RXA4




�Input of the TX signals sent from the DTRU�Input of the DCOM combining signals

N (male)TXB

�Input of the TX signals sent from the DTRU�Input of the DCOM combining signals

N (male)TXA

Power supply input3V3POWER

Sends to the DDPU control signals, communication signals,

clock signals and subrack number

DB26

(female)COM


RUN

ALM

VSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTA

ANTB


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


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



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


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


System Signal Flow

� the signal flow of the service and signaling include

�DL Signal Flow

�UL Signal Flow

�Signaling Processing Signal Flow

�Clock Signal Flow

�Combined Cabinet Signal Flow


DL Signal Flow

D

D

PU

Um

BSC

BTS3012 Cabinet

MSAntennaFeeder

Abis

DT

R

U

DT

M

U


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 to

the DDPU

�The duplexer in the DDPU filters the signals sent from the

DTRU and transmits the signals through antennas and

feeders


UL Signal Flow

D

A

FU

Um

BSC

BTS3012 Cabinet

MSAntennaFeeder

Abis

DT

R

U

DT

M

U


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 DTRU

after 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


Signaling Processing Signal Flow

BTS3012

DDPUDTRUDTMU

BSCAbis


Signaling Processing Signal Flow

� 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


Clock Signal Flow

DTMUBoards in main

cabinet

Boards in slavecabinet

A-bis

Clock distributioncable between

cabinets


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


Antenna Feeder subsystem

Antenna

TMA

Antennasupport

Jumper

JumperFeeder

Jumper

AntennaFeeder

JumpersTMA


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

Antenna

connector


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

Om nidirectional

antennaSingle polarization antenna

Dual polarization

antenna


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


Types of Main Feeder

� 7/8 inch

�Cable loss=0.043dB/m

� 5/4 inch


� 1/2 inch jumper


�Used between the antenna and the main feeder

�Between the antenna and the tower-top amplifier

�Between the cabinet and the lightning arrester


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 triplex

filter, low noise amplification, and feeder

Lowernoise

amplific-ation

Sending

filter

Receivingfilter

Bypass

DC

BTS

TMA

Feeder

Receivingfilter


Antenna Pattern

� The antenna pattern describes the radiating abilities of

antennas in all directions

360°

Omni Antenna Directional antenna

120° 90° 65°


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


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 rule

all 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


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-one

function). 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（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


Typical configuration S1/1/1（transmit diversity+4-way receive diversity）

� S1/1/1 transmit diversity+4-way

receive mode，each cell is

configured one DTRU and two

DDPU


� 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（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（PBT mode）

� S2/2/2 PBT mode，each cell is

configured two DTRU and one

DDPU

� 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


Typical configuration S4/4/4（ 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


Typical Configuration S1/2/1

� S1/2/1,cell1 and cell 3 need

share one DTRU, cell 2 need

configure one DTRU and one

DDPU.

� 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


Typical configuration S8/8/8

� S8/8/8 cell 1 and cell 3

are configured 4

DTRU,2 DCOM and 1

DDPU


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


Typical configuration S8/8/8

� S8/8/8 cell2 is

configured 4 DTRU,2

DCOM and 2 DDPU, cell

2 need cross the cabinet


should be：wideband

transmit combination

mode ，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

RXB3

RXB4

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

RXB3

RXB4

TX A

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

RF-EX1

RF-EX2

RF-EX3

RF-EX4


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 cables

�The 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


� Functions and features of BTS3012

� BTS3012 hardware structure

� Antenna and feeder system

� Typical configuration

SummarySummary

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