37757175 2 huawei bts3012 hardware structure

8/8/2019 37757175 2 HUAWEI BTS3012 Hardware Structure

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Know the functions and features of BTS

Know the BTS hardware structure



Location

PSTNISDN

PSPDN

Um Interface

BTS3012

BTS3012

BTS3012

BTS3012

OMC

HLR/AUC/EIR

BSC

MSC/VLR

SMC/VM

A Interface

MAP M A P

TUP,ISUPMS

MS

MS

NSS



Functions (BTS)

BTS is the radio part of the BSSIt implements the radio transmission and radio channelcontrol for its subscribers (MSs) through the air interface

It also provides the wired interface functions to BSC.BTS is the radio transceiver controlled by the BSC to serve acertain cell



BTS consists of

RFS (Radio Frequency Subsystem)

Common subsystem



Hardware structure (for 18TRXs)



BTS3012 Cabinet and Boards (for 18TRXs)

For 18

TRXs



BTS3012 Cabinet and Boards (for 18TRXs)Subrack Board/Module Full Name Configuration Quantity in One Cabinet

Full Configuration MinimumConfiguration

Common subrack DTMU Transmission/Timing/Management Unit for DTRU BTS 2 1

DEMU Environment Monitoring Unit for DTRU BTS 1 0

DATU Antenna and TMA Control Unit for DTRU BTS 2 0

DCSU Combined cabinet Signal connection Unit for DTRU BTS 1 1

DCCU Cable Connection Unit for DTRU BTS 1 1

ECMB Enhanced Common Module Backplane for DTRU BTS 1 1

Set-on-top subrack DELC E1 Signal Lightning-Protection Card for DTRU BTS 3 1

DMLC Monitor Signal Lightning-Protection Card for DTRU BTS 1 0

DSAC Signal Access Card for DTRU BTS 1 1

DCTB Cabinet Top Backplane for DTRU BTS 1 1

DTRU subrack DTRU Double-Transceiver Unit 9 1

DTRB Double-Transceiver Unit Backplane 1 1

DAFU subrack DCOM Combining Unit for DTRU BTS 3 0

DDPU Dual-Duplexer Unit for DTRU BTS 6 0

DFCU Filter Combiner Unit for DTRU BTS 3 0

DFCB Filter Combiner Unit for DTRU BTS 1 0

Fan subrack Fan box Fan Module 1 1



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 BTSDATU Antenna and TMA control Unit for DTRU BTS



Functions of DTMU

Controls, maintains, and operates the BTS

Downloads software for the BTSProvides fault management, configuration management,performance management, and security managementProvides centralized clock distribution and management of

the entire BTS, and the hot backup of the clock unitProvides backup for the E1 ports and the main control unitMonitors the external fan control board and the power modules



Functions of DEMU

The DEMU guarantees the normal operation of the BTS by monitoring thesurrounding environment.

The DEMU performs the following functions:

Monitors the environment information sent from the smoke sensor,water sensor, temperature and humidity sensor, infrared sensor, anddoor control sensor.

Collects alarm information and reports it to the DTMU.



Functions of DCSU

The Combined cabinet Signal connection Unit for DTRU BTS (DCSU) isplaced in slot 5 of the common subrack. The DCSU is a mandatoryboard. Only one DCSU can be configured.

The DCSU performs the following functions:

Transmits clock signals, data signals, and control signals between themain cabinet and the extension cabinet.

Transmits the clock signals, data signals, and control signals from theDTMU to the DTRU ( for BTS3012 ) or QTRUs ( for 36TRXs).Ⅱ



Double transceiver subsystem (BTS3012 ) Ⅱ

DTRU (Double Transceiver Unit)

DTRB



Functions of DTRU (BTS3012 ) Ⅱ

Baseband Processing Part

Processes the signaling, such as coding, decoding, interleaving, de-interleaving, modulation, and demodulation.

Amplifies the output power.

RF Transmitting Part

Modulates the baseband signals into RF signals , and performs frequencyhopping.

Transmit RF signal to DDPU.

RF Receiving Part

Demodulates the RF signals into baseband signals, and performs

frequency hopping.

Divides the received RF signals and performs receive diversity.



Functional structure of DTRU (BTS3012 ) Ⅱ

DTRU Baseband and RF Unit (DBRU)DTRU Power Amplifier Unit (DPAU)

DTRU Power Supply Unit (DTPS)

DTMU

DTPS

DTRU

- 48V DC

DPAU

DBRUDAFU



RF Front-End Subsystem (BTS3012 ) Ⅱ

The functions of the BTS3012 RF front-end subsystem areⅡ

performed by the boards in the DAFU subrack.

The DAFU subrack can be configured with the DDPU, DCOM,DFCU, DFCB, or the combination of these modules.

DDPU (Dual Duplexer Unit for DTRU BTS)

DCOM (Combining Unit for DTRU BTS)

DFCU (Filter Combiner Unit for DTRU BTS)

DFCB (Filter Combiner Unit for DTRU BTS)



Functions of DDPU (BTS3012 ) Ⅱ

The DDPU performs the following functions:

Provides lightning protection through the ANT port.

Detects VSWR alarms in the antenna system.

Receives the gain control signals for the low noise amplifier.

Transmits multiple routes of RF signals from the transmitter tothe antenna.

Receives signals from the antenna, amplifies and quartersthese signals, and then transmits them to the receiver of theDTRU.



Thank you



Switches on DCSU Board You can adjust the switches on the DCSU board as follow:

Master cabinet: SW1-all ON

SW2~SW5-all ON

SW6~SW7-all OFF

SW8-all ONSW9-OFF ON ON ONOthers go as default .

Slave Cabinet: SW1-all OFFSW2~SW5-all ON

SW6~SW7-all OFFSW8-OFF OFF ON ON

SW9-OFF ON ON ON

Others go as default.



Functions of DCCUThe DCCU is placed in slot 6 of the DCMB in the common

subrack. The DCCU is amandatory board. Only oneDCCU can be configured.

The DCCU performs thefollowing functions:

Transfers E1 signals.Transfers the control signalsfor the fans.

Transfers the clock signalsfrom the DAFU subrack.

Processes the power inputsthrough the EMI filter, andthen transmits the power tothe common subrack.



Functions of DATU

The DATU can be installed in slot 2, 3, 4, or 7 of theDCMB in the common subrack. The DATU is anoptional board. A maximum of two DATUs can beconfigured.

The DATU performs the following functions:

Controls the RET antenna.

Provides power for the TMA over the feeder.

Reports alarms related to the control of the RETantenna.

Monitors the current from the feeder.



Relation between boards and slot numbers

Board Slot No.DTMU Slots 0 and 1

DEMU Slots 2, 3, 4,or 7

DATU Slots 2, 3, 4,or 7

DCSU Slot 5

DCCU Slot 6



Signal Protection 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

D C F

C K B 2

C K B 1



Functions of DMLC

The DMLC is configured in slot 0, 1, or 2 of the set-on-top subrack. The DMLC is an optional board, which isused with the DEMU. Only one DMLC is required infull configuration.

The DMLC performs the following functions:

Provides lightning protection for Boolean input andoutput signals.

Provides lightning protection for analog signals thatare transmitted from the smoke sensor, water sensor, door control sensor, infrared sensor,humidity and temperature sensor.

SWIN

SWOUT

DMLC

AIN



Functions of DELC

The DELC is configured in slot 0, 1, or 2 of the set-on-top subrack. These three slots are shared bythe DELC and DMLC. The DELC is a mandatoryboard. At least one DELC should be configured.

The DELC provides lightning protection for 4routes of E1 signals. A maximum of three DELCscan be configured to provide lightning protectionfor 12 routes of E1 signals.

The DELC performs the following functions:

Provides lighting protection for E1 signals.

Transmits E1 signals to the DCCU, throughwhich the signals are sent to the DTMU for processing.

DELC

TR



Functions of DSAC

The DSAC is placed in slot 3 of the set-on-topsubrack. The DATU is a mandatory board. Only oneDSAC is required in full configuration.

The DSAC performs the following functions:

Provides six Boolean alarm inputs.

Provides two CBUS3 signal outputs.

Provides two lightning protection arrester failurealarm inputs of the power supply.

Provides lightning protection for BITS clock signals.

DSAC

C O M 1

E A C

S Y N C

C O M

2

S 1 + S 1 - S

2 + S 2 -



Panels on DTRU (BTS3012 ) Ⅱ

There are two types of

DTRU: type A and typeB. The four LEDs onthe DTRU panelindicate the operatingstatus of the DTRUand other functionalsubsystems.

DTRU (type A) has 10ports and DTRU (type

B) has 8 ports. Theseports exchangessignals with the RFfront-end subsystem.

DTRU panel (type

A) DTRU panel (type B)



LEDs on the DTRU panel

LED Color Description Status Remarks

RUN Green Operating andpower-on indicator of the DTRU

On There is power supply. However, the module is faulty.

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

Slow flash (on for 2 sand off for 2 s)

The module is starting.


The module works normally.

Fast flash (on for 0.2 sand off for 0.2 s)

The DTMU is issuing configuration data to the DTRU.

ACT Green Operating indicator of the transceiver

On The DTRU is operating. (The DTMU issuingconfiguration data normally and the cells starts) All thechannels on the two TRXs operate normally.

Off The communication between the DTRU and theDTMU is not established.


A part of logical channels work normally (before andafter TRX mutual aid).

ALM Red Alarm indicator On (including high-frequency flash)

Critical alarm (The module is faulty.)

Off The module is normal.

RF_IND Red RF indicator On There is voltage standing wave radio (VSWR) alarm.

Off Normal


There is a radio link alarm.



Ports on DTRU (type A) panelPort Type Remarks

TX1 N femaleconnector

It is the output port for the signals from TRX1.

• In transmit independency or transmit diversity mode, the TX port routes the signals tothe TX port of the module in the RF front-end subrack.

• In PBT or wideband combination mode, the TX1 port routes the signals to the IN1port.

IN1 SMA femaleconnector

In PBT or wideband combination mode, the IN1 port is short-circuited with the TX1 port.

TCOM N femaleconnector

In PBT or wideband combination mode, the TCOM port is used to output the combinedsignals from the IN1 and IN2 ports.

IN2 SMA femaleconnector

In PBT or wideband combination mode, the IN2 port is short-circuited with the TX2 port.

TX2 N femaleconnector

It is the output port for the signals from TRX2.

• In transmit independency or transmit diversity mode, the TX port routes the signals tothe TX port of the module in the RF front-end subrack.

• In PBT or wideband combination mode, the TX2 port routes the signals to the IN2port.

RXM1 SMA femaleconnector

• In receive independency or receive diversity mode, it is the input port for the main RFsignal.

• In 4-way receive diversity mode, it is the input port for the diversity signal 1.

RXD1 SMA femaleconnector • In receive independency or receive diversity mode, it is the input port for the diversityRF signal.


RXM2 SMA femaleconnector

• In receive independency mode, it is the input port for the main RF signal.


RXD2 SMA femaleconnector

• In receive independency mode, it is the input port for the diversity RF signal.


PWR 3V3 power connector Power input port



Ports on DTRU (type B) panel

Port Type Remarks

TX1 N female connector It is the output port for the signals from TRX1.

• In transmit independency or transmit diversity mode, the TX port routes thesignals to the TX port of the module in the RF front-end subrack.

• In PBT or wideband combination mode, this port is suspended.

TCOM N female connector In PBT or wideband combination mode, the TCOM port is used to output thecombined signals from the TX1 and TX2 ports.

TX2 N female connector It is the output port for the signals from TRX2.• In transmit independency or transmit diversity mode, the TX port routes the

signals to the TX port of the module in the RF front-end subrack.

• In PBT or wideband combination mode, this port is suspended.

RXM1 SMA female connector • In receive independency or receive diversity mode, it is the input port for the mainRF signal.


RXD1 SMA female connector • In receive independency or receive diversity mode, it is the input port for thediversity RF signal.


RXM2 SMA female connector • In receive independency mode, it is the input port for the main RF signal.


RXD2 SMA female connector • In receive independency mode, it is the input port for the diversity RF signal.


PWR 3V3 power connector Power input port



DTRU transmit mode-transmit independency

TCOM

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combiner combiner



DTRU transmit mode-transmit diversity

TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2TX2

Man made multi way

combiner combiner



DTRU transmit mode-PBT

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1TCOM

IN2

TX2

Same phase

combiner combiner



DTRU transmit mode-wideband combination

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

combiner combiner



DTRU receive modes

Receive independency

Receive diversity

4-way receive diversity



DTRU receive mode- Receive independency

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

divider divider

combiner combiner

divider divider



DTRU receive mode- Receive diversity

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combiner combiner

divider divider

divider divider



Intra structure of DTRU

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combiner combiner

divider divider

divider divider



Functions of DTRB (BTS3012 ) Ⅱ

The DTRB is placed in the DTRUsubrack. The DTRB provides six slotsto house the DTRUs.

The DTRB connects the DCSU withthe DTRU.

The DTRB performs the following

functions:Provides bus connection betweenthe common subsystem and thedouble-transceiver subsystem.

Specifies the slot number and rack

number of the DTRU.Transmits the in-position signals of the DTRUs to the DCSU.



Functional structure of the DDPU



LEDs on the DDPU panel

RUN

ALM

VSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTA

ANTB

LED Color Description Status Meaning

RUN Green Operating andpower-onindicator of theDDPU

On There is power supply. However, the module is faulty.

Off There is no power supply or the module is faulty.Slow flash (onfor 1s and off for 1s)

The module works normally.

Fast flash (onfor 0.2s and off for 0.2s)

The DTMU is issuing configuration data to the DDPU or the DDPU is loading software programs.

ALM Red Alarm indicator On (includinghigh-frequencyflash)

Alarms (including VSWR alarm). This indicates that thereare faults.

Off No alarm

Slow flash (onfor 1s and off for 1s)

The DDPU is starting or loading the latest application.

VSWRA Red VSWR alarmindicator for channel A


There is a VSWR alarm with channel A.

On There is a critical VSWR alarm with channel A.

Off There is no VSWR alarm with channel A.

VSWRB Red VSWR alarmindicator for channel B


There is a VSWR alarm with channel B.

On There is a critical VSWR alarm with channel B.

Off There is no VSWR alarm with channel B.



Functions of DCOM (BTS3012 ) Ⅱ

The DCOM is placed in the DAFU subrack. Itcan be inserted in the DAFU subrack with theDDPU.

The DCOM is optional and up to threeDCOMs can be configured. The precondition

for configuring the DCOM is that thewideband combination function in the DTRUmust be used when there is an additionalrequirements for the combination of signals.

The DCOM combines two routes of TXsignals from the DTRU, and then sends themto the DDPU.

DCOM

TX-COM

TX2

TX1

ONSHELL



Ports on the DCOM panel

Port Type Description

ONSHELL DB26 female connector It exports the in-position signals of the DCOMto the DCTB of the BTS3012.

TX-COM N female connector It is the output port for the signals combinedfrom the TX1 and TX2 ports of the DCOM.

TX1 N female connector It is the input port for the combined signalsfrom the DTRU to the DCOM.

TX2 N female connector



Functions of the Fan BoxThe fan box forms a loop with the air inlet box to provide forced ventilationand dissipation for the common subrack, DTRU subrack, and DAFU subrack.

The fan box performs the following functions:

Monitors the temperature at the air inlet of the cabinet and thetemperature in the fan subrack, and then adjusts the speed of the fans.

Communicates with the DTMU to adjust the speed of the fans and reportalarms.

FANSTATE

COMPWR



LEDs on the fan box

LED Color Status Description

STATE Green Fast flash (on for 0.125 s and off for 0.125 s)

The NFCB communicates with the DTMUabnormally. There is no alarm.

Red Fast flash (on for 0.125 s and off for 0.125 s)

An alarm is generated.

Green Slow flash (on for 1s and off for 1 s)

The board operates normally.

Orange (redand green)

On The software of the board is beingupgraded.

Green or red or orange

Off There is no power supply or the board isfaulty.



Chapter 1 OverviewChapter 1 Overview

Chapter 2 System ComponentsChapter 2 System Components

Chapter 3 Signal ProcessingChap ter 3 Signal Processing

Chapter 4 Typical configurationChapter 4 Typical configuration



Signal Flow of the BTS3012 Ⅱ

The BTS3012 signal flow is associated with the traffic andⅡ

signaling of the BTS.

The BTS3012 signal flow consists of:Ⅱ

DL traffic signal flow

UL traffic signal flow

Signaling processing signal flow

Signal flow for cabinet groups

Ⅱ



DL Traffic Signal Flow of the BTS3012 Ⅱ

DL T ffi Sig l Fl



DL Traffic Signal FlowThe DL traffic signal flow is as follows:

The BSC sends E1 signals to the DELC through E1 cables.The DELC provides lightning protection for the received E1 signals, and then sends the E1

signals to the DCTB.The DCTB sends the E1 signals to the DCCU through the TOP signal cable connecting theDCTB with the DCCU/DSCU.The DCCU sends the E1 signals to the DTMU through the ECMB.On receiving the signals, the DTMU converts the E1 signals through the DBUS. The DTMUalso assigns the data based on the data configuration on the OML. Then, the signals are sentto the DCSU and the DTRUs in DTRU subrack 0 through the ECMB.

The DCSU sends the signals to the DTRB in DTRU subrack 1 through the signal cablebetween the DCSU and the DTRB.The DTRB sends the signals to the DTRUs in DTRU subrack 1.After receiving the signals, the DTRUs in the two DTRU subracks perform digital filtering, up-conversion, and filter amplification, and then send the signals to the DDPU/DFCU/DFCB.The duplexer in the DDPU/DFCU/DFCB filters the signals from the DTRU, and then sends

the signals to the antenna subsystem for transmission.



UL Traffic Signal Flow of the BTS3012 Ⅱ

UL Traffic Signal Flow




The UL traffic signal flow is as follows:

The antenna receives the signals from the MS. After being amplified by theTMA, the signals are transmitted to the DDPU/DFCU/DFCB through thefeeder. The TMA is optional. It is used to compensate the feeder loss andenhance receive sensitivity of the DDPU/DFCU/DFCB antenna port.

The DDPU/DFCU/DFCB receives the UL signals and transmits the signals

to the DTRUs in the two DTRU subracks after they are filtered by theduplexer and amplified by the lower noise amplifier (LNA).

The DTRU in DTRU subrack 1 receives the signals from theDDPU/DFCU/DFCB and transmits the signals to the DTRB after amplification and down-conversion.

The DTRB sends the signals to the DCSU.





The DCSU sends the signals to the DTMU through the ECMB. In addition, theDTRU in DTRU subrack 0 receives the signals from the DDPU/DFCU/DFCB,and transmits the signals to the DTMU through the ECMB after amplification anddown conversion.

The DTMU backs up the E1 signals and converts the E1 signals through theDBUS. The DTMU then sends the converted signals to the DCCU through theECMB.

The DCCU sends the signals to the DCTB through the TOP signal cableconnecting the DCTB with the DCCU/DSCU.

The DCTB sends the signals to the DELC.

The DELC provides lightning protection for the signals. Then, it sends the

signals to the BSC through the E1 cables.



Signaling processing flow

The signaling processing flow is as follows:

The BSC sends the signaling data to the DTMU of the BTS.

After processing the signaling, the DTMU sends the signaling to theDTRU and DDPU (DFCU or DFCB).

The DTRU and DDPU (DFCU or DFCB) report their board status tothe DTMU.

The DTMU obtains the status of the BTS3012 by collecting andanalyzing the states of all the boards. Then, it transmits theinformation to the BSC through the Abis interface.



Signal Flow of BTS3012 Cabinet GroupsⅡ

The signal flow of BTS3012 cabinet groups refers to the signal flowbetween the main cabinet group and the extension cabinet groups.

The signal flow of cabinet groups involves clock signals and controlsignals.

Bus connection between BTS3012 cabinet groups is shown asⅡ

follows:



Clock Signals

DTMUBoards in main

cabinet

Boards in slavecabinet

A-bis

Clock distributioncable betweencabinets



Clock Signals Description

The clock signal flow includes the following steps:The external reference clock is transmitted to the clockmodule in the DTMU through the Abis interface

The clock module performs phase lock and frequencydivision on the clock signals to generate different clock

signals for BTSs

The clock signals are transmitted to the modules in themain cabinet such as the DTRU and the DDPU

The clock signals are transmitted to the modules in theslave cabinets through the clock distribution cable



Chapter 1 OverviewChapter 1 Overview

Chapter 2 System ComponentsChapter 2 System Components

Chapter 3 Signal ProcessingChapter 3 Signal Processing

Chapter 4 Typical configurationChap ter 4 Typical configuration



Configuration Principles for the BTS3012 Ⅱ

Configure the BTS3012 according to the following principles:Use a minimum number of antennas.

Use a minimum number of cabinets.

Configure all the TRXs that belong to one synchronized cell in onecabinet group.

Adhere to the following principles when configuring the BTS3012 cabinets:

If less than 18 TRXs are required in the synchronized cells of a site, useone cabinet to configure the site.

If more than 18 TRXs are required in the synchronized cells of a site, usecabinet groups to configure the site.



Configuration Features for the BTS3012 Ⅱ

The BTS3012 has the following features in terms of configuration:Supports omnidirectional cell coverage and directional cell coverage

Supports the grouping of three cabinets

The RF TX mode supports wideband combining, PBT, transmit diversity,and non-combining. The DTRU connected to the DFCU does not supportthe wideband combining mechanism.

The RF RX mode supports the receive diversity, independent receive,and four-way receive diversity.

Typical Configuration of One BTS3012 Cabinet S2/2/2Ⅱ



Typical Configuration of One BTS3012 Cabinet S2/2/2Ⅱ

The right figure shows

the cabling of RF cablesin an S2/2/2 cell. TheRF TX cable is blue, theRF RX cable is red, andthe combining short-circuiting signal cable isblack.

Typical Configuration of One BTS3012 CabinetⅡ



The right figure shows

the cabling of RF cablesin an S6/6/6 cell.

S6/6/6



Functions and features of BTS3012

BTS3012 hardware structureSystem Signal Flow

Typical configuration

SummarySummary



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37757175 2 huawei bts3012 hardware structure

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