HUAWEI-BTS3012-Hardware-Structure.pdf

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Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.

HUAWEI BTS3012

Hardware Structure

Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page2

Objectives

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


Contents

1. Overview

2. System Components

3. Signal Processing

4. Antenna and Feeder System

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

MAP

TUP,ISUP MS

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


Contents

1. Overview






Hardware structure

DTRU DAFU

Antenna and feeder

subsystem Forepart of RF Subsystem

TMA TMA

DTRU DAFU

TMA TMA

DTRU DAFU

Double transceiver

subsystem

DATU

Um Interface

DATU

fiber

E1

Abis Interface

Common subsystem

NFCB

Metro 100

DTMU

DEMU

E1

BITS Monitor

TBUS/DBUS/CBUS

MS

FH_BUS

Extension

cabinet

DBUS/

TBUS

CBUS

CBUS3

CBUS3

CBUS3

CBUS3

CBUS2

CBUS2

CBUS2

CBUS3

CBUS3

Pro

tectio

n fo

r sig

na

l

Electric tilt antenna & TMA feed

Electric tilt antenna & TMA feed

Electric tilt antenna &TMA feed CBUS3

FH_BUS

FH_BUS

RF signal

RF signal

RF signal


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


BTS3012 Cabinet and Boards D D D D

Wiring & Air Inlet

Wiring

D

D P U

D C O M

D C O M

D D P U

D C O M

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

Wiring

FAN

Air Inlet

M L C

Power and E MC

Transmission Unit

D D P U

E L C

E L C

S A C

Transmission Unit

D T M

U

D T M

U

D E M

U

D

C

C U

D

C

S U

D

A

T U

Double

transceiver

subsystem

Common

Subsystem

Antenna Front-End

of the RF Subsystem

(DAFU)

Cabinet Top Access

Subsystem (DCTB)



Wiring & Air Inlet

Wiring

D

D P U

D C O M

D C O M

D D P U

D C O M

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

Wiring

FAN

Air Inlet

M L C

Power and E MC

Transmission Unit

D D P U

E L C

E L C

S A C

Transmission Unit

D T M

U

D T M

U

D E M

U

D

C

C U

D

C

S U

D

A

T U

Double

transceiver

subsystem

Common

Subsystem

Antenna Front-End

of the RF Subsystem

(DAFU)

Cabinet Top Access

Subsystem (DCTB)


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

BIU DTRU

DTMU

BSC

MCU MMI

LMT

Abis

External

synchronized clock Subrack number

and clock


Indicators on DTMU

RUN

ACT

PLL

LIU1

LIU2

LIU3

LIU4

SWT

ALM

RST

MMI

T2M

FCLK

T13M

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

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


Indicator Color Description Status Meaning

LIU2 Green Indicates the

transmission status of E1

port 2 and port 6

Off E1 port 2 is normal when SWT is out

E1 port 6 is normal when SWT is on

On E1 port 2 near end alarm occurs when SWT is out

E1 port 6 near end alarm occurs when SWT is on

Fast flash (4 Hz) E1 port 2 remote end alarm occurs when SWT is out

E1 port 6 remote end alarm occurs when SWT is on



port 3 and port 7









port 4 and port 8







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


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

Output of 6-route Boolean value and input of 32-route main

node alarms

DMLC DEMU

CBUS3 Monitor 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

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

CC_IN

CC_OUT

TO_DTRB

TOP2

DCSU


GM51DCSU VERB SW6

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

Silk-

Screen Type Description

TRAN MD64

(female) For E1 signal input

To_FAN DB26

(female)

Connects to the fan panel through

cables

TO_TO

P1

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

ACT

ALM

ANT0

ANT1

ANT2

ANT3

ANT4

ANT5



Wiring & Air Inlet

Wiring

D

D P U

D C O M

D C O M

D D P U

D C O M

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

Wiring

FAN

Air Inlet

M L C

Power and E MC

Transmission Unit

D D P U

E L C

E L C

S A C

Transmission Unit

D T M

U

D T M

U

D E M

U

D

C

C U

D

C

S U

D

A

T U

Double

transceiver

subsystem

Common

Subsystem

Antenna Front-End

of the RF Subsystem

(DAFU)

Cabinet Top Access

Subsystem (DCTB)


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

C

KB

1


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-



Wiring & Air Inlet

Wiring

D

D P U

D C O M

D C O M

D D P U

D C O M

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

Wiring

FAN

Air Inlet

M L C

Power and E MC

Transmission Unit

D D P U

E L C

E L C

S A C

Transmission Unit

D T M

U

D T M

U

D E M

U

D

C

C U

D

C

S U

D

A

T U

Double

transceiver

subsystem

Common

Subsystem

Antenna Front-End

of the RF Subsystem

(DAFU)

Cabinet Top Access

Subsystem (DCTB)


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

DBRU

DAFU


Indicators on DTRU

Indicator 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 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



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

Connectors on DTRU


DTRU transmit mode

No combining

Diversity transmitter

Power booster technology

Wide band combining


No combining

TCOM

TRX0

TX

TRX1

TX

TX1

IN1

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combiner


Diversity transmitter

TRX1

TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Man made multi way

combiner


Power booster technology

TRX1

TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Same phase

combiner


Wide band combining

TRX0

TX

TRX1

TX

TX1

IN1

TCOM

IN2

TX2

combiner


DTRU receive mode

Independent receiver

Dividing receiver

Four diversity receiver


Independent receiver

TRX1

TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

divider

combiner

divider


Dividing receiver

TRX0

TX

TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combiner

divider

divider


Four diversity receiver

TRX0

TX

TRX1

TX

divider

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



Wiring & Air Inlet

Wiring

D

D P U

D C O M

D C O M

D D P U

D C O M

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

D

T R U

Wiring

FAN

Air Inlet

M L C

Power and E MC

Transmission Unit

D D P U

E L C

E L C

S A C

Transmission Unit

D T M

U

D T M

U

D E M

U

D

C

C U

D

C

S U

D

A

T U

Double

transceiver

subsystem

Common

Subsystem

Antenna Front-End

of the RF Subsystem

(DAFU)

Cabinet Top Access

Subsystem (DCTB)


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

RXA1

RXA2 RXA3

RXB1

RXB2 RXB3 RXB4


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

RUN

ALM

VSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTA

ANTB


Interface on DDPU Interface Type Description

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 DTRU

Input of the DCOM combining signals

TXB N (male) Input of the TX signals sent from the DTRU

Input of the DCOM combining signals

RXA1 SMA (female) Main 1 output port




RXB1 SMA (female) Diversity 1 output port




ANTA DIN (female) RF jumper port

ANTB DIN (female) RF jumper port

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


ONSHE

LL

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

FAN STATE

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


Contents

1. Overview






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

P

U

Um

BSC

BTS3012 Cabinet

MS Antenna Feeder

Abis

D

T

R

U

D

T

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

F

U

Um

BSC

BTS3012 Cabinet

MS Antenna Feeder

Abis

D

T

R

U

D

T

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



BTS3012

DDPU DTRU DTMU

BSC Abis



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

DTMU Boards in main

cabinet

Boards in slave

cabinet

A-bis

Clock distribution

cable 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


Contents

1. Overview






Antenna Feeder subsystem

Antenna

TMA

Antenna

support

Jumper

JumperFeeder

Jumper

Antenna

Feeder

Jumpers

TMA


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

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

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 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


Contents

1. Overview






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

（Diversity transmitter）

S1/1/1 Diversity transmitter / Four

diversity receiver mode，each cell is

configured one DTRU and two DDPU

BSC data configuration should be

Diversity transmitter mode

Four diversity receiver 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

（No combining 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


No combining mode

Dividing receiver mode


（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 configurationS2/2/2

（Power booster technology）

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


Power booster technology mode

Independent receiver mode


49 - 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



（Wide band combining）

S4/4/4 Wide band combining mode ，

each cell is configured two DTRU

and one DDPU


Wide band combining mode



（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 share one

DTRU, cell 2 need one DTRU and

one DDPU


No combining mode

Independent receiver mode

No combining mode



（46 or 47.8）-1.0

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

cell1 cell3 cell2

DTRU1

DTRU2



S8/8/8 cell 1 and cell 3 are

configured 4 DTRU,2 DCOM

and 1 DDPU

BSC data configuration

should be

Wide band combining

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

DCOM DCOM


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

Wide band combining

mode


Cabinet top power（dBm）

（46 or 47.8）-3.3-3.3-

1.0

Attention：only support RF

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

DCOM DCOM


Combined Cabinet Signal Cables

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 cable

Data cable

Clock cable

Control cable


Summary

Functions and features of BTS3012

BTS3012 hardware structure

Antenna and feeder system

Typical configuration

Thank you www.huawei.com

Thank you www.huawei.com

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

Lower noise

amplific -ation

Sending

filter

Receiving filter

Bypass

DC

BTS

TMA

Feeder

Receiving filter

HUAWEI-BTS3012-Hardware-Structure.pdf

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