HUAWEI BTS3012 Hardware Structure pot

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  DCC

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

 BTS3012 Technical Manual

 BTS3012 Installation Manual

Chapter 1 Overview Chapter 2 System Components Chapter 3 Signal Processing Chapter 4 Antenna and Feeder System Chapter 5 Typical configuration

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

MS

MS

Features and Functions

 Support networking topology includes star, tree, chain and ring

 Support A5/1 and A5/2 encryption/decryption

 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

Chapter 1 Overview Chapter 2 System Components Chapter 3 Signal Processing Chapter 4 Antenna and Feeder System Chapter 5 Typical configuration

Common subsystem NFCB

Metro 100 DTMU

DEMU E1

BTS3012 Cabinet and Boards

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

EMC

D D P U

E L C

E L C

S A C

D T M

D T M

D E M

D C

D C D A

BTS3012 Cabinet and Boards

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

 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

Abis

External synchronized clock and clockSubrack number

Indicators on DTMU

RUN Green Indicates

operation Slow flash (0.25 Hz)Slow flash (0.5 Hz) OML is blockedNormal

Fast flash at uncertain intervals

BSC data loading Off Power failure of the board ACT Green Indicates

whether the board is active or standby

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

RUN ACT PLL LIU1 LIU2 LIU3 LIU4 SWT ALM

RST MMI

T2M FCLK T13M

DTMU

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 LIU3 Green Indicates the

transmission status of E1 port 3 and port 7

Off E1 port 3 is normal when SWT is out

E1 port 7 is normal when SWT is on

On E1 port 3 near end alarm occurs when SWT is out

E1 port 7 near end alarm occurs when SWT is on Fast flash (4

Hz)

E1 port 3 remote end alarm occurs when SWT is out

E1 port 7 remote end alarm occurs when SWT is on LIU4 Green Indicates the

transmission status of E1 port 4 and port 8

Off E1 port 4 is normal when SWT is out

E1 port 8 is normal when SWT is on

On E1 port 4 near end alarm occurs when SWT is out

E1 port 8 near end alarm occurs when SWT is on Fast flash (4

Hz) E1 port 4 remote end alarm occurs when SWT is outE1 port 8 remote end alarm occurs when SWT is on SWT Green Indicates handover

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

Indicators on DTMU

RUN ACT PLL LIU1 LIU2 LIU3 LIU4 SWT ALM

RST MMI

T2M FCLK

DTMU

Interface on the DTMU panel

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

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

CC_IN CC_OUT

TO_DTRB

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

DEMU DATU

The interfaces on the DCCU panel

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

TO_TOP1 MD64 (female) Connects to the cabinet top subrack through cables

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

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

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

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 input of lightning protection arrester failure

-Double transceiver subsystem

 DTRU （ Double Transceiver Unit ）

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

Functional structure of DTRU

 DTRU Power Amplifier Unit (DPAU)

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 Critical alarm occurs to the board.

DTRU

TX1 IN1 TCOM IN2 TX2 RST RUN ACT ALM RF_IND RXM1 RXD1 RXM2

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

DTRU

TX1 IN1 TCOM IN2

TX2 RST RUN ACT ALM RF_IND

PWR

RXM1 RXD1 RXM2 RXD2

DTRU transmit mode

DTRU transmit mode-transmit independence

IN2 TX2

RXM1 RXD1

RXM2 RXD2

combiner

DTRU transmit mode-transmit diversity

TRX0

TX

TX

TX1 IN1 TCOM IN2 TX2

Man made multi way

combiner

DTRU transmit mode-PBT

TX2

Same phase

combiner

DTRU transmit mode-wideband transmit combination

IN2 TX2

combiner

DTRU receive mode

 Receive diversity

 4-way receive diversity

DTRU receive mode- Receive independence

IN2 TX2

RXM1 RXD1

RXM2

divider

combiner

divider

DTRU receive mode- Receive diversity

RXM1 RXD1

RXM2 RXD2

combiner

divider divider

DTRU receive mode- 4-way receive diversity

TRX0

TX

TRX1

TX divider

divider

TX1 IN1 TCOM IN2 TX2

RXM1 RXD1

RXM2

combiner

Intra structure of DTRU

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

Front-End of the RF Subsystem

 DDPU (Dual Duplexer 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

0

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

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

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

RUN ALM VSWRA

RXA1 RXA2 RXA3 RXA4 RXB1

DDPU

TXA

COM

POWER VSWRB ANTA ANTB

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Input of the DCOM combining signals

Input of the DCOM combining signals

Diversity 3 output port

RUN ALM VSWRA

RXA1 RXA2 RXA3 RXA4 RXB1 RXB2 RXB3 RXB4

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

transmission signals and outputs them to the

DDPU

DCOM

TX-COM

TX2 TX1 ONSHELL

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

and the DTMU is abnormal There is

no alarm

Hz)

The board is running normally

Orange (red and green)

Green or red or orange

board is faulty

Chapter 1 Overview Chapter 2 System Components Chapter 3 Signal Processing Chapter 4 Antenna and Feeder System Chapter 5 Typical configuration

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

MS AntennaFeeder

Abis

D T R U

D T M

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

MS AntennaFeeder

Abis

D T R U

D T M

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