BTS3012 Hardware Structure ISSUE1.0

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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


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

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

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU

Wiring

FANAir Inlet

MLC

Power and EMC

Transmission Unit

DDPU

ELC

ELC

SAC

Transmission Unit

DTMU

DTMU

DEMU

DC

CU

DC

SU

DAT

U


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


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

Externalsynchronizedclock

Subrack number and clock


Indicators on DTMU

Indicator Color Description Status MeaningRUN Green Indicates

operationSlow flash (0.25 Hz) OML is blockedSlow flash (0.5 Hz) NormalFast flash at uncertain intervals

BSC data loading

Off Power failure of the boardACT Green Indicates

whether the board is active or standby

Off StandbyOn Active

PLL Green Indicates the clock status

Off AbnormalOn Free-runFast flash (4 Hz) Pull-inFast 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

RUNACTPLLLIU1LIU2LIU3LIU4SWTALM

RST

MMI

T2M

FCLK

T13M

DTMU


Indicator Color Description Status MeaningLIU2 Green Indicates the

transmission status of E1 port 2 and port 6

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 alarmOn Hardware alarm

Indicators on DTMU

RUNACTPLLLIU1LIU2LIU3LIU4SWTALM

RST

MMI

T2M

FCLK

T13M

DTMU


Interface on the DTMU panel

Interface Type Description

T2M SMB (female) Outputs reference testing clock

FCLK SMB (female) 216.7 Hz frame clock

T13M SMB (female) 13M primary reference clock

MMI RJ45 Near end maintenance network port


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 DEMUCBUS3Monitor 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

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


GM51DCSU VERB SW6SW9

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

DCCUNFCB

DCTB

DCSU

DEMU

DATU


The interfaces on the DCCU panel

POWER

DCCU

To_FAN

TO_TOP1

TRAN

Silk-Screen Type Description

TRAN MD64 (female) For E1 signal input

To_FAN DB26 (female) Connects to the fan panel through cables

TO_TOP1 MD64 (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 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

ACTALM

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

ML

C

D

EL

C

D

EL

C

D

SA

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+S

1-S

2+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 DTRUIndicator Color Description Status Meaning

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

indicatorsOn Standing wave alarmOff NormalSlow flash (0.5 Hz)

RL alarm

DTRU

TX1

IN1

TCOM

IN2

TX2

RST

RUNACTALMRF_IND

PWR

RXM1

RXD1RXM2

RXD2


Indicators on DTRU

Interface Type DescriptionTX1 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

RUNACTALMRF_IND

PWR

RXM1

RXD1RXM2

RXD2


DTRU transmit mode

Transmit independence

Transmit diversity

PBT

Wideband transmit combination


DTRU transmit mode-transmit independence

TCOM

TRX0

TX

TRX1

TX

TX1

IN1

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combiner


DTRU transmit mode-transmit diversity

TRX1

TRX0

TX

TX

TX1

IN1

TCOM

IN2TX2

Man made multi way

combiner


DTRU transmit mode-PBT

TRX1

TRX0

TX

TX

TX1

IN1TCOM

IN2

TX2

Same phase

combiner


DTRU transmit mode-wideband transmit combination

TRX0

TX

TRX1

TX

TX1

IN1TCOM

IN2

TX2

combiner


DTRU receive mode

Receive independence

Receive diversity

4-way receive diversity


DTRU receive mode- Receive independence

TRX1

TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

divider

combiner

divider


DTRU receive mode- Receive diversity

TRX0

TX

TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combiner

divider

divider


DTRU receive mode- 4-way receive diversity

TRX0

TX

TRX1

TXdivider

divider

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combiner


Intra structure of DTRU

TRX0

TX

TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combiner

divider

divider


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

duplexer divider duplexer divider

ANTA

RXA1RXA2RXA3

RXB1RXB2RXB3RXB4


Indicators on DDPU Indicator Color Description Status Meaning

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

RUNALMVSWRA

RXA1RXA2RXA3RXA4RXB1RXB2RXB3RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTAANTB


Interface on DDPU

Interface Type DescriptionCOM DB26

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

POWER 3V3 Power supply inputTXA N (male) Input of the TX signals sent from the DTRU

Input of the DCOM combining signalsTXB N (male) Input of the TX signals sent from the DTRU

Input of the DCOM combining signalsRXA1 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 portANTB DIN (female) RF jumper port

RUNALM

VSWRA

RXA1RXA2RXA3RXA4RXB1RXB2RXB3RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTAANTB


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

Interface Type Description

ONSHELL

DB26 (female)

For indentification of the board type of DCOM 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 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

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 ungraded

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

BSCBTS3012 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

BSCBTS3012 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 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



BTS3012

DDPUDTRUDTMU

BSCAbis



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

Omnidirectional antenna

Single 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

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


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

Sendingfilter

Receivingfilter

Bypass

DC

BTS

TMA

Feeder

Receivingfilter


Antenna Pattern

The antenna pattern describes the radiating abilities of antennas in all directions

360¡ ãOmni 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 ruleuse as few as possible antennas for cell configuration.

The minimum cabinet ruleuse 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 ruleTRXs 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

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


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 DDPU


BSC data configuration should be ：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

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

Cabinet Top power （ dBm ）：（ 46 or 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

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

Cabinet top power （ dBm ）：（ 46 or 47.8 ） -3.3-3.3-1.0

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 configured 4 DTRU,2 DCOM and 2 DDPU, cell 2 need cross the cabinet

BSC data configuration 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

RXA1RXA2RXA3RXA4

RXB2

RXB3RXB4

TX A

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

RF-EX1RF-EX2

RF-EX3RF-EX4

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

DDPU

TX B

RXB1

RXA1

RXA2RXA3RXA4

RXB2

RXB3RXB4

TX A

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

RF-EX1

RF-EX2RF-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

Slavecabinetof maincabinetgroup

Maincabinetof maincabinetgroup

Maincabinet

ofslave

cabinetgroup

Slavecabinet

ofslave

cabinetgroup

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 ISSUE1.0

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