Download ppt - HUAWEI BTS3012

© 2002-2011 HUAWEI-UET Joint Telecom & IT Center, KICS-UET

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

ObjectivesObjectives


1. Overview

2. System Components

3. Signal Processing

4. Antenna and Feeder System

5. Typical Configuration

ContentsContents


LocationLocation

MS: Mobile Station BTS: Base Transceiver Station

BSC: Base Station Controller

HLR: Home Location Register

AUC: Authentication Center

EIR: Equipment Identity Register

MSC: Mobile Switching Center

VLR: Visitor Location Register

SMC: Short Message Center

VM: Voice Mailbox OMC: Operation and Maintenance Center

PSTN ISDN

PSPDN

Um Interface

BTS3012

BTS3012

BTS3012

BTS3012

OMC

HLR/AUC/EIR

BSC

MSC/VLR

SMC/VM

A Interface

MAPMAP

TUP,ISUPMS

MS

MS


Features and FunctionsFeatures and Functions

Support GSM900M 、 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 FunctionsFeatures 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)

Support more various transmission mode includes E1, STM-1,

microwave, and satellite transmission


ContentsContents

1. Overview






Hardware structureHardware structure

TMA TMA

DTRU DAFU

Antenna and feeder subsystem

Forepart of RFSubsystem

TMA TMA

DTRU DAFU

TMA TMA

DTRU DAFU

Double transceiver subsystem

DATU

Um Interface

DATU

fiber

E1

Abis Interface

Common subsystem

Metro 100

DTMU

DEMU

E1

BITSMonitor

TBUS/DBUS/CBUS

MS

FH_BUS

Extension cabinet

DBUS/

TBUS

CBUS

CBUS3

CBUS3

CBUS3

CBUS3

CBUS2

CBUS2

CBUS2

CBUS3

CBUS3

Pro

tect

ion f

or

signal

Electric tilt antenna & TMA feed

Electric tilt antenna & TMA feed

Electric tilt antenna &TMA feedCBUS3

FH_BUS

FH_BUS

RF signal

RF signal

RF signal


BTS3012 Cabinet and BoardsBTS3012 Cabinet and BoardsD D D D

Wiring & Air Inlet

Wiring

DDPU

DCOM

DCOM

DDPU

DCOM

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU

Wiring

FAN

Air Inlet

MLC

Power and EMC

Transmission Unit

DDPU

ELC

ELC

SAC

Transmission Unit

DTMU

DTMU

DEMU

DC

CU

DC

SU

DAT

U


Common Subsystem

Antenna Front-End of the RF Subsystem (DAFU)

Cabinet Top Access Subsystem (DCTB)



Wiring & Air Inlet

Wiring

DDPU

DCOM

DCOM

DDPU

DCOM

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU

Wiring

FAN

Air Inlet

MLC

Power and EMC

Transmission Unit

DDPU

ELC

ELC

SAC

Transmission Unit

DTMU

DTMU

DEMU

DC

CU

DC

SU

DAT

U


Common Subsystem




Structure of DTMUStructure of DTMU

MCK

OML

DBUS

CBUS2

Clock

BIUDTRU

DTMU

BSC

MCUMMI

LMT

Abis

External

synchronizedclockSubrack number

and clock


Indicators on DTMU 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 boardACT Gree

nIndicates whether the board is active or standby

Off StandbyOn Active

PLL Green

Indicates the clock status

Off AbnormalOn Free-runFast flash (4 Hz) Pull-inFast flash (1 Hz) Lock

LIU1 Green

Indicates the transmission status of E1 port 1 and port 5

Off E1 port 1 is normal when SWT is out E1 port 5 is normal when SWT is on

On E1 port 1 near end alarm occurs when SWT is outE1 port 5 near end alarm occurs when SWT is on

Fast flash (4 Hz) E1 port 1 remote end alarm occurs when SWT is outE1 port 5 remote end alarm occurs when SWT is on


Indicators on DTMUIndicators on DTMU

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 outE1 port 6 is normal when SWT is on


Fast flash (4 Hz)

E1 port 2 remote end alarm occurs when SWT is outE1 port 6 remote end alarm occurs when SWT is on




Fast flash (4 Hz)





Fast flash (4 Hz)


SWT Green Indicates handover status of E1

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

On LIU1 to LIU4 indicate the transmission status of E1 port 5 to 8.

ALM Red Alarm indicators Off No hardware alarm

On Hardware alarm


Functions of DEMUFunctions 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 DEMUCBUS3Monitor signal


Functions of DCSUFunctions of DCSU

The Combined Cabinet Signal Connection Unit for DTRU BTS (DCSU) is placed in slot 5 of the common subrack, which is located in the lower part of the cabinet. There is only one DCSU and it is mandatory

The DCSU transfers signals for the combined cabinet and cabinet group between the common subrack and the cabinet top subrack

DCMB

DTMU

DCSUDTRB

DCTB

DCCU

DEMU

DATU


Functions of DCCUFunctions 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

DCMB

DTMU

DCCUNFCB

DCTB

DCSU

DEMU

DATU


The interfaces on the DCCU panel The interfaces on the DCCU panel

Silk-Screen

Type Description

TRANMD64 (female)

For E1 signal input

To_FANDB26 (female)

Connects to the fan panel through cables

TO_TOP1

MD64 (female)

Connects to the cabinet top subrack through cables

POWER 3V3 For power input of the common unit

POWER

DCCU

To_FAN

TO_TOP1

TRAN


Functions of DATUFunctions 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

DDPU

DCOM

DCOM

DDPU

DCOM

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU

Wiring

FAN

Air Inlet

MLC

Power and EMC

Transmission Unit

DDPU

ELC

ELC

SAC

Transmission Unit

DTMU

DTMU

DEMU

DC

CU

DC

SU

DAT

U


Common Subsystem




Cabinet Top Access SubsystemCabinet 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

CK

B1


Function of DMLCFunction 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

Smoke/water/access control/infrared/humidity/temperature sensor signal input

SWIN

SWOUT

DMLC

AIN


Function of DELCFunction 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 DSACFunction 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

DDPU

DCOM

DCOM

DDPU

DCOM

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU

Wiring

FAN

Air Inlet

MLC

Power and EMC

Transmission Unit

DDPU

ELC

ELC

SAC

Transmission Unit

DTMU

DTMU

DEMU

DC

CU

DC

SU

DAT

U


Common Subsystem




Double transceiver subsystem Double transceiver subsystem

DTRU （ Double Transceiver Unit） DTRB

DTRB

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU


Functions of DTRUFunctions of DTRU

RF subsystem transmit part. RF subsystem receive


Functional structure of DTRU Functional structure of DTRU

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

DTMU

DTPS

DTRU

- 48V DC

DPAU

DBRUDAFU


Indicators on DTRUIndicators 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


Interfac

e

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

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 modeDTRU transmit mode

No combining Diversity transmitter Power booster technology Wide band combining


No combiningNo combining

TCOM

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner


Diversity transmitterDiversity transmitter

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Man made multi way

combinercombiner


Power booster technologyPower booster technology

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Same phase

combinercombiner


Wide band combiningWide band combining

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

combinercombiner


DTRU receive modeDTRU receive mode

Independent receiver Dividing receiver Four diversity receiver


Independent receiverIndependent receiver

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

dividerdivider

combinercombiner

dividerdivider


Dividing receiverDividing receiver

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider


Four diversity receiverFour diversity receiver

TRX0TRX0

TX

TRX1TRX1

TXdividerdivider

dividerdivider

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner


Intra structure of DTRUIntra structure of DTRU

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider


Functions of DTRBFunctions 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

DDPU

DCOM

DCOM

DDPU

DCOM

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU

Wiring

FAN

Air Inlet

MLC

Power and EMC

Transmission Unit

DDPU

ELC

ELC

SAC

Transmission Unit

DTMU

DTMU

DEMU

DC

CU

DC

SU

DAT

U


Common Subsystem




Front-End of the RF SubsystemFront-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 DDPUFunctions 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 Functional structure of the DDPU

ANTB

TXA

TXB

RXA4

duplexerduplexer dividerdivider duplexerduplexer dividerdivider

ANTA

RXA1RXA2RXA3

RXB1RXB2RXB3RXB4


Functions of DCOMFunctions 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


ContentsContents

1. Overview






System Signal FlowSystem Signal Flow

the signal flow of the service and signaling include DL Signal Flow UL Signal Flow Signaling Processing Signal Flow Clock Signal Flow


DL Signal FlowDL Signal Flow

DDPU

Um

BSC

BTS3012 Cabinet

MSAntennaFeeder

Abis

DTRU

DTMU


DL Signal FlowDL 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 UL Signal Flow

DAFU

Um

BSC

BTS3012 Cabinet

MSAntennaFeeder

Abis

DTRU

DTMU


UL Signal Flow 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


Signaling Processing Signal FlowSignaling Processing Signal Flow

BTS3012

DDPUDTRUDTMU

BSCAbis


Signaling Processing Signal FlowSignaling 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


Clock Signal FlowClock Signal Flow

DTMUBoards in main

cabinet

Boards in slavecabinet

A-bis

Clock distributioncable between

cabinets


Clock Signal Flow DescriptionClock 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


ContentsContents

1. Overview






Antenna Feeder subsystem Antenna Feeder subsystem

Antenna

TMA

Antennasupport

Jumper

JumperFeeder

Jumper

AntennaFeederJumpers

TMA


AntennaAntenna

BTS3012 antennas are classified:

By radiation features in horizontal directions: omnidirectional

antennas and directional antennas

By polarization features: single polarization antennas and

dual polarization antennas

Omnidirectional antenna

Single polarization antenna

Dual polarization antenna


Lightning ArresterLightning Arrester

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


Antenna PatternAntenna 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


PolarizationPolarization

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


ContentsContents

1. Overview






Configuration PrinciplesConfiguration Principles

The configuration principles of the BTS3012 cabinet are as follows: The minimum antenna rule

The minimum cabinet rule

The complete synchronous cell rule

The basic cabinet priority rule


Typical configuration S1/1/1Typical configuration S1/1/1（（ Diversity transmitterDiversity 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

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 configurationS2/2/2Typical configurationS2/2/2（（ No combining modeNo 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 BSC data configuration should be

No combining mode Dividing receiver mode

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1


Combined Cabinet Signal CablesCombined 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 cableClock cable

Control cableData cable

Clock cable

Control cable


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