Bts3012 Hardware Structure !

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Internal

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

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

PSTN ISDN

PSPDN

Um Interface

BTS3012

BTS3012

BTS3012

BTS3012

OMC

HLR/AUC/EIR

BSC

MSC/VLR

SMC/VM

A Interface

MAPMAP

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


BTS3012 Cabinet and Boards

D D D D

Wiring & Air Inlet

Wiring

DDPU

DCOM

DCOM

DDPU

DCOM

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU

Wiring

FAN

Air Inlet

MLC

Power and EMC

Transmission Unit

DDPU

ELC

ELC

SAC

Transmission Unit

DTMU

DTMU

DEMU

DC

CU

DC

SU

DAT

U

Abbreviation

sDescription

DTRU Double Transceiver Unit

DTMU Transmission&Timing&Management Unit

DDPU Dual Duplexer Unit

DCOM Combining Unit

DCCU Cable Connection Unit

DAFU Antenna Front-end Unit

DATU Antenna and TMA Control Unit

DMLC Monitor Signal Lightning-Protection Card

DELC E1 Signal Lightning-Protection Card

DSAC Signal Access Card

DCSU Combined cabinet Signal connection Unit

DEMU Environment Monitoring Unit

DCTB Cabinet Top Backplane

FAN BoxNodeB Fan Controlling and monitoring B

oard

common

DTRU

DAFU


BTS3012 Cabinet and Boards

Abbreviations Description

DTRU Double Transceiver Unit

DTMU Transmission & Timing & Management Unit for DTRU BTS

DCCU Cable Connection Unit for DTRU BTS

DAFU Antenna Front-end Unit for DTRU BTS

DDPU Dual Duplexer Unit for DTRU BTS

DCOM Combining Unit for DTRU BTS

DATU Antenna and TMA Control Unit for DTRU BTS

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

DCSU Combined cabinet Signal connection Unit for DTRU BTS

DEMU Environment Monitoring Unit for DTRU BTS

DCTB Cabinet Top Backplane for DTRU BTS

FAN Box NodeB Fan Controlling and monitoring Board


Hardware structure

TMA TMA

DTRU DAFU

Antenna and feeder subsystem

Forepart of RFSubsystem

TMA TMA

DTRU DAFU

TMA TMA

DTRU DAFU

Double transceiver subsystem

DATU

Um Interface

DATU

fiber

E1

Abis Interface

DELC

Common subsystem

NFCB

Metro 100

DTMU

DEMU

E1

BITSMonitor

TBUS/DBUS/CBUS

MS

FH_BUS

Extension cabinet


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 ac

tive and standby boards

Providing local MMI maintenance of the 10 M network port

Controlling, maintaining, and operating the BTS

Providing fault management, configuration management, perfor

mance management, and security management

Supporting 8-route digital alarm input. Two routes are lightning

arrester failure alarm detection


Structure of DTMU

MCK

OML

DBUS

CBUS

Clock

BIUDTRU

DTMU

BSC

MCUMMI

LMT

Abis

External

synchronizedclock TBUS


Indicators on DTMU

Indicator Color Description Status Meaning

RUN Green Indicates operation

Slow flash (0.25 Hz) OML is blocked

Slow flash (0.5 Hz) Normal

Fast flash at uncertain intervals

BSC data loading

Off Power failure of the board

ACT Green Indicates whether the board is active or standby

Off Standby

On Active

PLL Green Indicates the clock status

Off Abnormal

On Free-run

Fast flash (4 Hz) Pull-in

Fast flash (1 Hz) Lock

LIU1 Green Indicates the transmission status of E1 port 1 and port 5

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

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

Fast flash (4 Hz) E1 port 1 remote end alarm occurs when SWT is outE1 port 5 remote end alarm occurs when SWT is on

RUN

ACT

PLL

LIU1

LIU2

LIU3

LIU4

SWT

ALM

RST

MMI

T2M

FCLK

T13M

DTMU




Off E1 port 2 is normal when SWT is outE1 port 6 is normal when SWT is on


Fast flash (4 Hz)

E1 port 2 remote end alarm occurs when SWT is outE1 port 6 remote end alarm occurs when SWT is on




Fast flash (4 Hz)





Fast flash (4 Hz)


SWT Green Indicates handover status of E1

Off LIU1 to LIU4 indicate the transmission status of E1 port 1 to 4.

On LIU1 to LIU4 indicate the transmission status of E1 port 5 to 8.

ALM Red Alarm indicators Off No hardware alarm

On Hardware alarm

Indicators on DTMU

RUN

ACT

PLL

LIU1

LIU2

LIU3

LIU4

SWT

ALM

RST

MMI

T2M

FCLK

T13M

DTMU


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 DEM

U under full configuration.

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

and access control ,Handling alarms

Guaranteeing normal operation of the equipment

DMLC DEMUCBUSMonitor signal


Functions of DCSU

The Combined Cabinet Signal Co

nnection Unit for DTRU BTS (DC

SU) is placed in slot 5 of the com

mon subrack, which is located in t

he lower part of the cabinet. Ther

e is only one DCSU and it is man

datory

The DCSU transfers signals for th

e combined cabinet and cabinet g

roup between the common subra

ck and the cabinet top subrack

DCMB

DTMU

DCSUDTRB

DCTB

DCCU

DEMU

DATU


The interfaces on the DCSU panel

CC_IN

CC_OUT

TO_DTRB

TOP2

DCSU

Silk- Screen Type Description

CC_OUT MD64 (female) For cable output from the combined cabinet

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

To_DTRB MD64 (female) Connecting to the DTRB through cables

TOP2 DB26 (female)Connecting to the cabinet top subrack through cables


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 s

ignals of the common subrack.

Inputting the power of the comm

on subrack

DCMB

DTMU

DCCUNFCB

DCTB

DCSU

DEMU

DATU


The interfaces on the DCCU panel

POWER

DCCU

To_FAN

TO_TOP1

TRAN

Silk-Screen

Type Description

TRANMD64 (female)

For E1 signal input

To_FANDB26 (female)

Connects to the fan panel through cables

TO_TOP1MD64 (female)

Connects to the cabinet top subrack through cables

POWER 3V3 For power input of the common unit


Functions of DATU

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

ommon subrack with the DEMU. It is optional and th

ere are maximum two DATUs

Transmitting the remote electrical tilt unit (RET) contr

ol signals

Feeding the TMA

Communicating with the DTMU through CBUS for co

ntrol 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 s

ubrack with the DELC. There is only one DMLC and it

is optional DMLC

Smoke/water/access control/infrared/humidity/tempera

ture sensor signal input

SWIN

SWOUT

DMLC

AIN


Function of DELC

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

p subrack with the DMLC

The DELC is mandatory and there is one DELC un

der minimum configuration

Without the DMLC, there are maximum three DEL

Cs, supporting up to 12 routes of protected E1 sign

als

DELC

TR


Function of DSAC

The DSAC is placed in slot 3 of the cabinet top subrac

k. There is only one DSAC and it is mandatory

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 Backplane

DTRB

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU


Stucture of TRX

DBUS

SCP(LAPD/m

and software)

CUI Filtering and FH

Clock processing part

TBPU

DSP(e.g.

encryption & decryption)

FH_BUS (baseband FH)

TDPRF synth& PLL

PAU

RCU

send

RPU

CBUS

Intermediate frequency IF


Indicators on DTRU


RUN Green Indicates the running and power-on of the DTRU

On There is power supply or the board is faulty.

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

Slow flash (0.25 Hz)

The board is starting.

Slow flash (0.5 Hz)

The board is running.

Fast flash (2.5 Hz) The DTMU is sending configuraiton parameters to the DTRU.

ACT Green Indicates the TRX is working

On 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.

Off Communication between DTRU and DTMU is not set up

Slow flash (0.5Hz) Only parts of the logic channels are working normally (including after TRX mutual aid).

ALM Red Indicates alarm On (including high-frequency flash)

Critical alarm occurs to the board.

Off The board is normal.

RF_IND Red RF interface indicators

On Standing wave alarm

Off Normal

Slow flash (0.5 Hz)

RL alarm

DTRU

TX1

IN1

TCOM

IN2

TX2

RST

RUN

ACT

ALM

RF_IND

PWR

RXM1

RXD1

RXM2

RXD2


Indicators on DTRU

Interface Type Description

TX1 N (male) TX1 output signals: Output to the forepart of the RF when not in combiner Output to IN1 in combiner

IN1 SMA (female) Connects to TX1 in combiner

TCOM N (male) Combines and outputs IN1 and IN2 or implements PBT combined

output

IN2 SMA (female) Connects to TX2 in combiner

TX2 N (male) TX2 output signals: Output to the forepart of the RF when not in combiner Output to IN2 in combiner

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

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

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

RXD2 SMA (female) Diversity receive port of carrier 2 or Diversity 4 receive port of

carrier 1

PWR 3V3 Power supply

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 su

brack. It has six slots, each holding

one DTRU

The DTRB provides connections bet

ween the DCSU and the DTRU. All t

he 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 t

he antenna through the duplexer

Sending signals from the antenna after amplifying them to the t

ransceiver in the DTRU

Detecting standing wave alarms in the Antenna Feeder system

DL

UL


Functional structure of the DDPU ANTB

TXA

TXB

RXA4

duplexerduplexer dividerdivider duplexerduplexer dividerdivider

ANTA

RXA1RXA2RXA3

RXB1RXB2RXB3RXB4


Indicators on DDPU


RUN Green Indicates the DDPU is running and powerd on

On There is power supply and the board is faulty.

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

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

Fast flash (2.5 Hz) The DTMU is sending configuration parameters to the DDPU or the DDPU is loading software programs.

ALM Red Indicates an alarm On (including high-frequency flash)

There is alarm(including standing wave alarm) and the board is faulty.

Off No fault

Slow flash (0.5 Hz) The board is starting or loading the newest application programs

VSWRA Red Indicates a standing wave alarm of Channel A

Slow flash (0.5 Hz) Standing wave alarm occurs to Channel A

On Standing wave critical alarm occurs to Channel A

Off No standing wave alarm occurs to Channel A

VSWRB Red Indicates a standing wave alarm of Channel B

Slow flash (0.5 Hz) Standing wave alarm occurs to Channel B

On Standing wave critical alarm occurs to Channel B

Off No standing wave alarm occur to Channel B

RUNALM

VSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTAANTB


Interface on DDPU


COM DB26 (female)

Sends to the DDPU control signals, communication signals, clock signals and subrack number

POWER 3V3 Power supply input

TXA N (male) Input of the TX signals sent from the DTRUInput of the DCOM combining signals

TXB N (male) Input of the TX signals sent from the DTRUInput of the DCOM combining signals

RXA1 SMA (female)

Main 1 output port

RXA2 SMA (female)

Main 2 output port

RXA3 SMA (female)

Main 3 output port

RXA4 SMA (female)

Main 4 output port

RXB1 SMA (female)

Diversity 1 output port

RXB2 SMA (female)


RXB3 SMA (female)


RXB4 SMA (female)


ANTA DIN (female) RF jumper port

ANTB DIN (female) RF jumper port

RUNALM

VSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTAANTB


Functions of DCOM

The DCOM is placed in the DAFU subrack wit

h the DDPU

The DCOM is optional and there are a maxim

um three DCOMs. The DTRU combines two c

arriers into one channel. The DCOM is require

d when the DTRUs are insufficent

The DCOM combines the 2-route DTRU trans

mission signals and outputs them to the DDP

U (4 carriers)

DCOM

TX-COM

TX2

TX1

ONSHELL


Interfaces on DCOM


ONSHE

LL

DB26

(female)

For indentification of the board type of DCO

M and on-site status

TX—

COM

N (male) Output of combining signals from the

DCOM to DDPU

TX1 N (male) TX signal input from the DTRU to DCOM

TX2 N (male) TX signal input from the DTRU to DCOM


Functions of FAN BOX

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

on and dissipation for the common subrack, the DTRU subrack, and the D

AFU subrack

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

s' speed and running status are controlled by the Fan Controlling and Mon

itoring Board

FANSTATE

COM

PWR


Indicators on FAN BOX

Indicator Color Status Meaning

STATE Green Fast flash (4 Hz) Communication between the NFCB

and the DTMU is abnormal. There is

no alarm

Red Fast flash (4 Hz) Alarm occurs to the board

Green Slow flash (0.5

Hz)

The board is running normally

Orange (red

and green)

On The board software is being upgraded

Green or red or

orange

Off There is no power supply and the

board is faulty


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

DDPU

Um

BSC

BTS3012 Cabinet

MSAntennaFeeder

Abis

DTRU

DTMU


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

DAFU

Um

BSC

BTS3012 Cabinet

MSAntennaFeeder

Abis

DTRU

DTMU


UL Signal Flow

The UL signal flow includes the following steps:

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

mplified by the TMA, the signals are transmitted to the DDPU through th

e 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 a

fter they are filtered by the duplexer and amplified by the LNA

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

fter amplification and down conversion. The DTMU then transmits the si

gnals to the BSC through the Abis interface



BTS3012

DDPUDTRUDTMU

BSCAbis



The signaling processing signal flow includes the following steps:

The Abis interface board receives the signaling data from the BSC a

nd transmits the data to the DTMU

The DTMU performs decision and processing on the signaling and t

ransmits 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 ana

lyzing the status of all boards and transmits the information to the B

SC 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 di

vision on the clock signals to generate different clock si

gnals 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


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


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 antenna

s and directional antennas

By polarization features: single polarization antennas and dual polariz

ation antennas

Omnidirectional antenna

Single polarization antenna

Dual polarization antenna


Lightning Arrester is used to preve

nt the equipment from being dama

ged by the lightening current

feeder

jumper

Lightning Arrester

Lightning Arrester


Antenna Pattern

The antenna pattern describes the radiating abilities of

antennas in all directions

360¡ ã

Omni Antenna Directional antenna

120¡ ã 90¡ ã 65¡ ã


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 o

f 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 co

verage.

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 receive diversity.

The DCOM combines two carriers into one channel. The DCOM is require

d when the DTRUs are not sufficient.

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

ull configuration.

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

zation 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 i

n the right slide

BSC data configuration should be ： tr

ansmit independence mode ， receive

independence mode

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 re

ceive mode ， each cell is configu

red one DTRU and two DDPU

BSC data configuration should be ： transmit diversity mode

4-way receive mode

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 ， Ea

ch cell is configured one DTRU and one

DDPU

The connection for one cell is showed in th

e right slide

BSC data configuration should be ： transmit independence mode ， receiv

e diversity mode

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 c

onfigured two DTRU and one DD

PU

The connection for one cell is sho

wed in the right slide

BSC data configuration should be ：PBT mode

receive independence mode

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

BSC data configuration should be ：wideband transmit combination mode ，receive diversity mode

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 s

hare one DTRU, cell 2 need c

onfigure one DTRU and one

DDPU.

BSC data configuration shoul

d be ：

DTRU1 ： transmit independ

ence mode ， receive indepe

ndence mode ； DTRU2 ： tr

ansmit independence mode ，receive independence diversit

y modeDTRU

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 ar

e configured 4 DTRU,2

DCOM and 1 DDPU

BSC data configuration s

hould be ： wideband tra

nsmit combination mode ，receive diversity mode

DTRU

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 configure

d 4 DTRU,2 DCOM and

2 DDPU, cell 2 need cros

s the cabinet

BSC data configuration s

hould be ： wideband tra

nsmit 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 cableClock 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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Bts3012 Hardware Structure !

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