HUAWEI BTS3012 Hardware Structure

HUAWEI BTS3012 Hardware Structure www.huawei.com

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

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


Page2

References 

BTS3012 Technical Manual



BTS3012 Installation Manual



BTS3012 User Manual


Page3

Contents 1. Overview 2. System Components 3. Signal Processing 4. Antenna and Feeder System

5. Typical Configuration


Page4

Location Um Interface

MS BTS3012

PSTN ISDN PSPDN

TUP,ISUP BSC A Interface

MS

MSC/VLR MAP

BTS3012

HLR/AUC/EIR

BTS3012 MS

BTS3012

SMC/VM

OMC

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


Page5

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


Page6

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, STM1, microwave, and satellite transmission


Page7




Page8

Hardware structure Abis Interface

Um Interface

E1

fiber

Protection for signal

Monitor

BITS

Extension cabinet

TBUS/DBUS/CBUS

CBUS3

CBUS2

Electric tilt antenna &TMA feed

DATU DTRU FH_BUS

DTMU

DBUS/ CBUS TBUS

DEMU

DAFU

CBUS3 CBUS2

E1 Metro 100

TMA TMA

RF signal

FH_BUS

DTRU

RF signal

DAFU

CBUS3 CBUS3

CBUS2

TMA TMA

FH_BUS

DTRU

DAFU RF signal

NFCB

CBUS3

Common subsystem

CBUS3 CBUS3

Electric tilt antenna & TMA feed

DATU

Electric tilt antenna & TMA feed

Double transceiver subsystem


Forepart of RF Subsystem

Page9

Antenna and feeder subsystem

MS

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


Page10

BTS3012 Cabinet and Boards Cabinet Top Access Subsystem (DCTB)

Antenna Front-End of the RF Subsystem (DAFU)

D M L C

D E L C

D C O M

D E L C

D D P U

D S A C

Power and E MC

D C O M

D D P U

D C O M

D D P U

D T R U

D T R U

Wiring


D T R U

D T R U

D T R U

D T R U

Wiring FAN Air Inlet

Common Subsystem

D T M U

D T M U

D E M U

D C S U

D C C U

D A T U

Wiring & Air Inlet Transmission Unit Transmission Unit


Page11



D M L C

D E L C

D C O M

D E L C

D D P U

D S A C

Power and E MC

D C O M

D D P U

D C O M

D D P U

D T R U

D T R U

Wiring


D T R U

D T R U

D T R U

D T R U


Common Subsystem

D T M U

D T M U

D E M U

D C S U

D C C U

D A T U



Page12

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


Page13

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


Page14

Structure of DTMU DTMU LMT

MMI

CBUS2 MCU

OML

BSC

Abis

BIU

DBUS

Clock External synchronized clock MCK


Subrack number and clock

Page15

DTRU

Indicators on DTMU Indicato Color Description Status Meaning r RUN Green Indicates Slow flash (0.25 Hz) OML is blocked operation Slow flash (0.5 Hz) Normal Fast flash at BSC data loading uncertain intervals Off Power failure of the board ACT Green Indicates Off Standby whether the On Active board is active or standby PLL Green Indicates the Off Abnormal clock status On Free-run Fast flash (4 Hz) Pull-in Fast flash (1 Hz) Lock LIU1 Green Indicates the Off E1 port 1 is normal when SWT is out transmission E1 port 5 is normal when SWT is on status of E1 On E1 port 1 near end alarm occurs when port 1 and SWT is out port 5 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


Page16

DTMU RUN ACT PLL LIU1 LIU2 LIU3 LIU4 SWT ALM

RST MMI

T2M FCLK T13M

Indicators on DTMU Indicator Color Description Status LIU2 Green Indicates the Off transmission status of E1 port 2 and port 6 On

LIU3

LIU4

Green

Green

SWT

Green

ALM

Red

Meaning E1 port 2 is normal when SWT is out E1 port 6 is normal when SWT is 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 Indicates the Off E1 port 3 is normal when SWT is out transmission status of E1 E1 port 7 is normal when SWT is on port 3 and port 7 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 Indicates the Off E1 port 4 is normal when SWT is out transmission status of E1 E1 port 8 is normal when SWT is on port 4 and port 8 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 Indicates handover status Off LIU1 to LIU4 indicate the transmission status of E1 port 1 to 4. of E1 On LIU1 to LIU4 indicate the transmission status of E1 port 5 to 8. Alarm indicators Off No hardware alarm On Hardware alarm


Page17

DTMU RUN ACT PLL LIU1 LIU2 LIU3 LIU4 SWT ALM

RST MMI

T2M FCLK T13M

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


Page18

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 CBUS3

Monitor signal DMLC


DEMU

Page19

Functions of DCSU 

The Combined Cabinet Signal Connection Unit for DTRU BTS

DTMU

(DCSU) is placed in slot 5 of the DCCU

common subrack, which is located in the lower part of the cabinet.

DCMB

DTRB DCSU DCTB

There is only one DCSU and it is mandatory 

The DCSU transfers signals for the

DEMU

DATU

combined cabinet and cabinet group between the common subrack and the cabinet top Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.

Page20

The interfaces on the DCSU panel SilkScreen

CC_OUT

Type

Description

DCSU

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

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


Page21

CC_IN

TO_DTRB

TOP2

Switch of DCSU GM51DCSU VERB

SW6 SW9

SW7 SW10 SW8

SW5

SW14

SW4

SW13

SW3

SW12

SW2 SW11 SW1


Page22

Functions of DCCU 

The DCCU is placed in slot 6 of the common subrack. There is

DTMU

only one DCCU and it is

NFCB DCMB

DCCU

mandatory

DCTB DCSU





Converting the input and output signals of the common subrack.

DEMU

Inputting the power of the

DATU

common subrack 

Providing EMI filtering


Page23

The interfaces on the DCCU panel SilkScreen

DCCU

Type

Description

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

TRAN

POWER 3V3

TRAN

To_FAN

For power input of the common unit

TO_TOP1

POWER


Page24

Functions of DATU DATU



The DATU is placed in slots 2 to 4 and slot 7 of the common subrack with the DEMU. It is

RUN ACT ALM

optional and there are maximum two DATUs 

Transmitting the remote electrical tilt unit (RET)

ANT0 ANT1

control signals

ANT2



Feeding the TMA



Communicating with the DTMU through

ANT3

ANT4 ANT5

CBUS3 for control and alarm report


Page25



D M L C

D E L C

D C O M

D E L C

D D P U

D S A C

Power and E MC

D C O M

D D P U

D C O M

D D P U

D T R U

D T R U

Wiring


D T R U

D T R U

D T R U

D T R U


Common Subsystem

D T M U

D T M U

D E M U

D C S U

D C C U

D A T U



Page26

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

D

D

M

E

E

S

L

L

L

A

C

C

C

C


Page27

CKB1

D

DCF

CKB2



Function of DMLC 

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

DMLC

top subrack with the DELC. There is only one DMLC and it is optional DMLC SWIN



Thirty-two-route Boolean value input



Six-route Boolean value output SWOUT



Four-route analog input



Smoke/water/access

control/infrared/humidity/temperature sensor signal input Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.

Page28

AIN

Function of DELC 

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

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


Page29

TR

Function of DSAC

S1+S1-S2+S2-

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

COM1



SYNC

failure alarm 

Access protection of BITS clock input


DSAC

COM 2

The DSAC is placed in slot 3 of the cabinet top

EAC



Page30



D M L C

D E L C

D C O M

D E L C

D D P U

D S A C

Power and E MC

D C O M

D D P U

D C O M

D D P U

D T R U

D T R U

Wiring


D T R U

D T R U

D T R U

D T R U


Common Subsystem

D T M U

D T M U

D E M U

D C S U

D C C U

D A T U



Page31

Double transceiver subsystem 

DTRU（Double Transceiver Unit）



DTRB DTRU DTRU

DTRB

DTRU DTRU DTRU DTRU


Page32

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


Page33

Functional structure of DTRU 

DTRU Baseband and RF Unit (DBRU)



DTRU Power Amplifier Unit (DPAU)



DTRU Power Supply Unit (DTPS) DTRU DPAU

DTMU

DAFU DBRU

DTPS -

48V DC


Page34

Indicators on DTRU DTRU Indicator RUN

ACT

Color

Description

Green Indicates the running and power-on of the DTRU

Green Indicates the TRX is working

Status

Meaning

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.

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

TX1 IN1 TCOM

Communication between DTRU and DTMU is not set up

IN2 TX2 RST RUN ACT

ALM

RF_IND

Red

Red

Slow flash (0.5Hz)

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

On (including highfrequency flash)

Critical alarm occurs to the board.

Off

The board is normal.

RXD1

RF interface indicators On

Standing wave alarm

RXM2

Off

Normal

RXD2

Slow flash (0.5 Hz)

RL alarm

Indicates alarm

ALM RF_IND RXM1


PWR

Page35

Connectors on DTRU Interface TX1

Type N (male)

Description

DTRU

TX1 output signals:

TX1

Output to the forepart of the RF when not in combiner IN1

Output to IN1 in combiner

IN1

SMA (female) Connects to TX1 in combiner

TCOM

N (male)

TCOM

Combines and outputs IN1 and IN2 or implements PBT combined

IN2

output TX2

IN2

SMA (female) Connects to TX2 in combiner

TX2

N (male)

RST

TX2 output signals:

ACT

Output to IN2 in combiner

ALM RF_IND

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

RXM1 RXD1

3V3

Power supply


RXM2 RXD2 PWR

carrier 1 PWR

RUN

Output to the forepart of the RF when not in combiner

Page36

DTRU transmit mode 

No combining



Diversity transmitter



Power booster technology



Wide band combining


Page37

No combining TX1

TX IN1 TCOM

combiner

IN2

TRX0

TX2

RXM1 RXD1

RXM2

TX

TRX1

RXD2


Page38

Diversity transmitter Man made multi way

TX1

TX

IN1

TCOM

combiner

IN2

TRX0

TX2

TX

TRX1


Page39

Power booster technology Same phase

TX1

TX IN1 TCOM

combiner

IN2

TRX0

TX2

TX

TRX1


Page40

Wide band combining TX1

TX

IN1 TCOM

combiner

IN2

TRX0

TX2

TX

TRX1


Page41

DTRU receive mode 

Independent receiver



Dividing receiver



Four diversity receiver


Page42

Independent receiver TX1 TX

IN1 combiner

TCOM

TRX0

IN2 TX2

RXM1 divider

RXD1

TX divider

RXM2

TRX1

RXD2


Page43

Dividing receiver TX1

TX

IN1 TCOM

combiner

TRX0

IN2 TX2

RXM1 divider

RXD1

TX divider

RXM2

TRX1

RXD2


Page44

Four diversity receiver TX1 TX

IN1 TCOM

combiner

TRX0

IN2 TX2

RXM1 divider TX

RXD1 divider

RXM2 RXD2


TRX1

Page45

Intra structure of DTRU TX1 TX

IN1 combiner

TCOM

TRX0

IN2 TX2

RXM1

divider TX

RXD1

divider

RXM2

TRX1

RXD2


Page46

Functions of DTRB 



The DTRB is placed in the DTRU subrack. It has six slots,

DTRU

each holding one DTRU

DTRU

The DTRB provides connections

DTRU

DTRB

between the DCSU and the

DTRU

DTRU. All the onsite signals are

DTRU

provided to the DCSU through

DTRU

the DTRB


Page47



D M L C

D E L C

D C O M

D E L C

D D P U

D S A C

Power and E MC

D C O M

D D P U

D C O M

D D P U

D T R U

D T R U

Wiring


D T R U

D T R U

D T R U

D T R U


Common Subsystem

D T M U

D T M U

D E M U

D C S U

D C C U

D A T U



Page48

Front-End of the RF Subsystem 

DDPU (Dual Duplexer Unit for DTRU BTS)



DCOM (Combining Unit for DTRU BTS)

D

D

D

D

D

D

C

D

C

D

C

D

O

P

O

P

O

P

M

U

M

U

M

U

0

1

2

3

4

5

NBBI


Page49

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


Page50

Functional structure of the DDPU ANTA

duplexer

ANTB

divider

duplexer

divider

TXA RXA1 RXA2 RXA3 RXA4 TXB RXB1 RXB2 RXB3 RXB4


Page51

Indicators on DDPU Indicator

Color

RUN

Green

Description

Status

Meaning ANTB

ALM

Red

Indicates the DDPU is running and powerd on

Indicates an alarm

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.

On (including highfrequency 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

ANTA DDPU RUN ALM VSWRA VSWRB

COM

POWER

RXA1

VSWRA

Red

Indicates a standing wave alarm of Channel A

Slow flash (0.5 Hz)

Indicates a standing wave alarm of Channel B

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

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

RXA2

TXA

RXA3 RXA4 RXB1 RXB2

VSWRB

Red


Page52

RXB3 RXB4

TXB

Interface on DDPU Interface Type COM DB26 (female) POWER 3V3 TXA N (male) TXB

N (male)

RXA1 RXA2 RXA3 RXA4 RXB1 RXB2 RXB3 RXB4 ANTA ANTB

SMA (female) SMA (female) SMA (female) SMA (female) SMA (female) SMA (female) SMA (female) SMA (female) DIN (female) DIN (female)

ANTB

Description Sends to the DDPU control signals, communication signals, clock signals and subrack number Power supply input Input of the TX signals sent from the DTRU Input of the DCOM combining signals Input of the TX signals sent from the DTRU Input of the DCOM combining signals Main 1 output port Main 2 output port Main 3 output port Main 4 output port Diversity 1 output port Diversity 2 output port Diversity 3 output port Diversity 4 output port RF jumper port RF jumper port


Page53

ANTA DDPU RUN ALM VSWRA VSWRB

COM

POWER

RXA1 RXA2

TXA

RXA3 RXA4 RXB1 RXB2 RXB3 RXB4

TXB

Functions of DCOM 

The DCOM is placed in the DAFU subrack

DCOM

with the DDPU ONSHELL



The DCOM is optional and there are a maximum three DCOMs. The DTRU TX-COM

combines two carriers into one channel. TX1

The DCOM is required when the DTRUs are insufficent 

The DCOM combines the 2-route DTRU

TX2

transmission signals and outputs them to the DDPU Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.

Page54

Interfaces on DCOM Interface

Type

Description

ONSHE

DB26

For indentification of the board type of

LL

(female)

DCOM and on-site status

TX—

N (male) Output of combining signals from the DCOM

COM

to DDPU

TX1

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

TX2

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


Page55

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 STATE

FAN PWR

COM


Page56

Indicators on FAN BOX Indicator STATE

Color Green

Status

Meaning

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

The board is running normally

Hz) Orange (red

On

and green) Green or red or orange

The board software is being ungraded

Off

There is no power supply and the board is faulty


Page57




Page58

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


Page59

DL Signal Flow Um

MS

Antenna Feeder

D D P U

D T R U

D T M U

Abis

BSC

BTS3012 Cabinet


Page60

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


Page61

UL Signal Flow Um

MS

Antenna Feeder

D A F U

D T R U

D T M U

Abis

BSC

BTS3012 Cabinet


Page62

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


Page63

Signaling Processing Signal Flow

BSC Abis DTMU

DTRU

DDPU

BTS3012


Page64

Signaling Processing Signal Flow 

The signaling processing signal flow includes the following steps: 

The Abis interface board receives the signaling data from the BSC

and transmits the data to the DTMU 

The DTMU performs decision and processing on the signaling and transmits the signaling to the DTRU and DDPU



The DTRU and DDPU report board status to the DTMU



The DTMU obtains the status of the BTS3012 by collecting and analyzing the status of all boards and transmits the information to the BSC through the Abis interface


Page65

Clock Signal Flow

Boards in main cabinet

A-bis DTMU Clock distribution cable between cabinets

Boards in slave cabinet


Page66

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


Page67




Page68

Antenna Feeder subsystem Antenna

Antenna Feeder Jumpers TMA

Antenna support Jumper Jumper

TMA

Jumper


Feeder

Page69

Antenna 

In mobile communications systems, the antenna consists of an array of element antennas, as shown in Figure Element antenna

Element antenna Feeding network

Feeding network

Feeding network

Antenna connector Directional antenna


Antenna connector Omnidirectional antenna

Page70

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

Page71

Dual polarization antenna

Lightning Arrester feeder

Lightning Arrester is used to prevent the equipment from being damaged by the lightening current inducted by the core line of the feeder jumper

Lightning Arrester


Page72

Types of Main Feeder 

7/8 inch 



5/4 inch 



Cable loss=0.043dB/m

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


Page73

Antenna Pattern 

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

360¡ ã Omni Antenna

120¡ ã

90¡ ã

Directional antenna


Page74

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


Page75




Page76

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


Page77

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


Page78

Typical configuration S1/1/1 （Diversity transmitter） 

DDPU

DDPU

RXA1

RXA1

S1/1/1 Diversity transmitter / Four diversity receiver mode，each cell is configured one DTRU and two DDPU

RXA2

TX A

RXA2

RXA3

RXA3

RXA4

RXA4

RXB1

RXB1 RXB2

RXB2

TX B

TX B



BSC data configuration should be 

Diversity transmitter mode

RXB3

RXB3

RXB4

RXB4

TX 1 IN 1





Four diversity receiver mode

Cabinet Top power（dBm）

TCOM IN2 TX 2



（46 or 47.8）-1.0

RXM 1 RXD 1 RXM 2 RXD 2

DTRU


TX A

Page79

Typical configurationS2/2/2 （No combining mode） DDPU



S2/2/2 transmit independence mode，each cell is

RXA1 RXA2

configured one DTRU and one DDPU

TX A

RXA3 RXA4



RXB1

The connection for one cell is showed in the right

RXB2 TX B RXB3

slide 

RXB4

BSC data configuration should be

TX 1 IN 1







No combining mode

TCOM IN2

Dividing receiver mode

TX 2

Cabinet Top power（dBm）

RXM 1 RXD 1



（46 or 47.8）-1.0

RXM 2 RXD 2

DTRU


Page80

Typical configurationS2/2/2 （Power booster technology）

DDPU RXA1



S2/2/2 PBT mode，each cell is

RXA2

TX A

RXA3

configured two DTRU and one DDPU

RXA4 RXB1 RXB2



The connection for one cell is showed in

TX B RXB3 RXB4

the right slide 


TX 1

TX 1

IN 1

IN 1

TCOM





Power booster technology mode



Independent receiver mode

TCOM IN2

IN2

TX 2

TX 2

Cabinet Top power（dBm） 

49 - 1.0

RXM 1

RXM 1

RXD 1

RXD 1

RXM 2

RXM 2

RXD 2

RXD 2

DTRU


DTRU

Page81

Typical configuration S4/4/4 （Wide band combining）

DDPU RXA1



RXA2

S4/4/4 Wide band combining mode ，

TX A

RXA3 RXA4

each cell is configured two DTRU

RXB1 RXB2 TX B

and one DDPU

RXB3 RXB4



BSC data configuration should be 





Wide band combining mode Dividing receiver mode

TX 1

TX 1

IN 1

IN 1

TCOM

TCOM

IN2

IN2

TX 2

TX 2


（46 or 47.8）-3.3-1.0

RXM 1

RXM 1

RXD 1

RXD 1

RXM 2

RXM 2

RXD 2

RXD 2

DTRU


DTRU

Page82

Typical Configuration S1/2/1 cell1 

S1/2/1,cell1 and cell 3 share one DTRU, cell 2 need one DTRU and



DDPU

DDPU

RXA1

RXA1

RXA1

RXA2

RXA2 RXA3

RXA3

RXA3


RXA4

RXA4

RXA4

RXB1

RXB1

RXB1



No combining mode



Independent receiver mode





DDPU

one DDPU

DTRU1

DTRU2

cell2

cell3



TX A

RXB2

RXB2

TX B

RXB3

RXB3

RXB3

RXB4

RXB4

RXB4

No combining mode Dividing receiver mode

TX 1

TX 1

IN 1

IN 1

TCOM

TCOM

IN2

IN2

TX 2

TX 2

（46 or 47.8）-1.0 RXM 1

RXM 1

RXD 1

RXD 1

RXM 2

RXM 2

RXD 2

RXD 2

DTRU


DTRU

Page83

TX A

RXB2 TX B

TX B


RXA2

TX A

Typical configuration S8/8/8 

S8/8/8 cell 1 and cell 3 are DDPU

configured 4 DTRU,2 DCOM

Tx-com

and 1 DDPU

Tx-com

RXA1 RXA2

TX1

TX A

TX1

RXA3 RXA4



BSC data configuration

RXB1 RXB2 TX 2

should be 

Wide band combining

RXB4

DCOM

TX 1 IN 1

IN 1

IN 1

IN 1

TCOM

TCOM

TCOM

TCOM




IN2

IN2

IN2

IN2 TX 2

TX 2

TX 2

TX 2



TX 2

DCOM

TX 1

TX 1 TX 1

mode

TX B

RXB3

Cabinet top power（dBm） 

（46 or 47.8）-3.3-3.3-1.0 DTRU


DTRU

DTRU

Page84

DTRU

Typical configuration S8/8/8 RF-EX1





S8/8/8 cell2 is configured 4 DTRU,2 DCOM and 2 DDPU, cell 2 need cross the cabinet BSC data configuration should be 






Cabinet top power（dBm） 



Wide band combining mode

（46 or 47.8）-3.3-3.31.0

Attention：only support RF hopping

RF-EX1 RF-EX2

RF-EX2

RF-EX3

RF-EX3

RF-EX4

RF-EX4

DDPU

DDPU RXA1 RXA2 TX A RXA3 RXA4 RXB1 RXB2 TX B RXB3 RXB4

TX 1 IN 1 TCOM IN2 TX 2

DTRU


Tx-com

RXA1 RXA2 TX A RXA3 RXA4 RXB1 RXB2 TX B RXB3 RXB4

TX1

TX 2

DCOM

TX 1

TX 1

IN 1

IN 1

TCOM

TCOM

IN2

IN2

TX 2

TX 2

DTRU

DTRU

Page85

Tx-com TX1

TX 2

DCOM

TX 1 IN 1 TCOM IN2 TX 2

DTRU

Combined Cabinet Signal Cables Slave

cabinet

Data cable Control cable

of main

cabinet

cabinet

Clock cable

Main Control cable

cabinet

of main group



Main

cabinet of

Clock cable

group

Data cable

cabinet Control cable

slave cabinet

Slave of slave

Clock cable

group

cabinet group

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


Page86

Summary 

Functions and features of BTS3012



BTS3012 hardware structure



Antenna and feeder system



Typical configuration


Page87

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 Thank you antenna. The triplex TMA consists of triplex www.huawei.com filter, low noise amplification, and feeder Sending TMA filter BTS

Bypass

Feeder

Receiving filter

Lower noise amplific -ation DC

Receiving filter

HUAWEI BTS3012 Hardware Structure

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