ome201102 gsm bts3012a hardware structure issue1.0

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OME201102 GSM BTS3012A Hardware Structure

ISSUE 1.0

2 Internal Use

ObjectivesObjectives

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

3 Internal Use

References References

BTS3012A Technical Manual

BTS3012A Installation Manual

BTS312 User Manual

4 Internal Use

Chapter 1 Overview

Chapter 2 Auxiliary Cabinet

Chapter 3 Main Cabinet

Chapter 4 Antenna and Feeder System

5 Internal Use

LocationLocation

MS: Mobile Station HLR: Home Location Register MSC: Mobile Switching Center VM: Voice Mailbox BTS: Base Transceiver Station AUC: Authentication Center

VLR: Visitor Location Register OMC: Operation and Maintenance Center

EIR: Equipment Identity Register BSC: Base Station Controller SMC: Short Message Center

PSTNISDN

PSPDN

Um Interface

BTS

BTS

BTS

BTS

OMC

HLR/AUC/EIR

BSCMSC/VLR

SMC/VM

A Interface

MAP MAP

TUP,ISUP

MS

MS

MS

6 Internal Use

Features and FunctionsFeatures and Functions

Outdoor BTS

High integration and low power consumption

15 radio carriers at the Abis sharing an E1 for transmission (15:1)

Support various transmission modes and complex topologies,

e.g. SDH, E1, microwave, satellite etc.

Support the configuration of up to S12/12/12 and facilitating expa

nsion

1-minute fast startup

7 Internal Use

Features and FunctionsFeatures and Functions

Support GSM900,DCS1800,EGSM and RGSM

Support GSM PHASE 1 、 PHASE 2 and PHASE 2+

Support GPRS and EDGE

Support baseband hopping and RF hopping

Support FR, HR, EFR and AMR

Support A5/1 and A5/2 encryption/decryption

8 Internal Use

Hardware StructureHardware Structure

DATA_BUS/CONTROL_BUS/TIMING_BUS

TMU

Transmission device

PMU

FH_BUS

CDU

PSU

TRX

TRX

TRX

Signal Processing UnitCommon Unit

CDU

CDU

antenna

antenna

antenna

Antenna Feeder Unit

External control

External alarm

Opt. fiber

XDSL

E1

9 Internal Use

Cabinet and BoardsCabinet and Boards

Boards in Cabinet:

CDU: Combiner & Divider Unit

TRX: Transceiver

PMU: Power Monitoring Unit

TMU: Timing/Transmission &

Management Unit

PSU: Power Supply Unit

TDU: Time Distribution Unit

TCU: Temperature Control Unit

ABB: Abis By-pass Board

TSU: Transmission Power Suppl

y Unit

EMUA: Environment Monitor Un

it Analyzer

Transmission device

Sub-rack

TSU

CDU

CDU

CDU

CDU

CDU

CDU

TRX

TRX

TRX

TRX

TRX

TRX

TRX

TRX

TRX

TRX

TRX

TRX

TCU

PSU

PSU

PSU

PSU

PSU

PMU

PSU

FAN

FAN FAN

FAN

Switch Box

Cable Inlet

AC power distribution

Sub-rack

E1 lighteningProtection sub-rack

DC powerdistribution

Sub-rack

Battery Cabin

Cable Inlet

TMU

ABB

ABB

Auxiliary CabinetAuxiliary Cabinet Main CabinetMain Cabinet

10 Internal Use

Chapter 1 Overview




11 Internal Use

Auxiliary SystemAuxiliary System

Um

MS

BTS3012A

Auxiliary CabinetMain Cabinet BSC

Abis

Environment monitoring system

Temperature adjustment system

PowerDistribution system

12 Internal Use

I. 220V AC three-phase distributionI. 220V AC three-phase distribution

Power Distribution SystemPower Distribution System

A

N

N

B

C

N

32A

5A

32A

5A

A,N

B,N

L,N

Contactor

AC distribution Unit

TCU

PSU

Arrester

MCBEMIfilter

220V AC input

+24V DC

Input to the DCDistribution frame

Socket 1

Socket 2

AC conditioner/heat exchanger

ABCN

Regulator

13 Internal Use

II. 220V AC single-phase distributionII. 220V AC single-phase distribution

Power SupplyPower Supply

L

N

N

L

L

N

32A

5A

32A

5A

L,N

L,N

Contactor


TCU

PSU

Arrester

MCBEMIfilter

220V AC input

+24V DC N

Socket 1

Socket 2

Input to DCDistribution frame


RegulatorL,N

L

14 Internal Use

III. 110V AC three-phase distributionIII. 110V AC three-phase distribution


A

N

N

B

C

N

32A

5A

32A

5A

B,N

C,N


TCU

PSU

Arrester

MCBEMIfilter

110V AC input

+24V DC

Input to the DCDistribution frame


A

B

C

N

Regulator

Transformer

TransformerA,N

Contactor

Socket 1

Socket 2

15 Internal Use

+24vDC distribution+24vDC distribution


AC input lightning protection power distribution unit A1441Z

PSU PSU PSU PMU

+24V DC output

DC distribution copper bar

Output bus bar

Input bus bar 220V AC input

16 Internal Use

PSU ConfigurationPSU Configuration

mode Capacity (TRX) Boards (PSU) Boards (PMU) notes

220/110VAC 1 ~ 3 3 1

One PSU for backup

4 ~ 6 4 1

7 ~ 9 5 1

10 ~ 12 6 1

17 Internal Use

TSU (optional)TSU (optional)

The TSU works under 1+! backup mode. Normally the two TSUs outp

ut equalized current. When one TSU gets faulty, another TSU will sup

ply power to the transmission equipment and report alarms.

-

+24VDC IN+

-

-48VDC IN+

Transmission device

TSUTSU

18 Internal Use

PMU structurePMU structure

PMUPMU

AC/DC

AC power supply

Power monitoring

unit PMUFan

Fuse

Load

AC/DC AC/DC AC/DC

Battery

19 Internal Use

FMUFMU

Fan feeding

Fan revolution speed control

Alarm detection

+24V power supply input interface

Functions of FMUFunctions of FMU

20 Internal Use

TCUTCU

TCU real-time monitors the temperature

in the cabinet. By controlling the power

distribution of the cabinet, it can prevent

the damage of over-high or over-low

temperature to the equipment and

components.

TCU controls the 220V AC input from

the external power supply, the +24V DC

output of the storage batteries

(excluding the power distribution of the

air-conditioner) and the power-on/off

commands for some boards according

to the temperature of the cabinet.

Functions of TCUFunctions of TCU

Sensor

PMU

TCU

TMU

AC lightning protection board

Storage battery

TRX/CDU

Voltage Stabilizer

Air conditioner/heat exchangerMonitoring

Subsystem

Alarm

signals

Control

signals

Control

signals

Temperature Test Access test Water testSmoke test

21 Internal Use

ABB (optional)ABB (optional)

It is in charge of the BTS transmission trunk. When power failure occurs at a c

ertain level (in the middle) of BTS in the chain networking, ABB will bypass the

Abis transmission line off this site, and directly connect it to the downstream B

TS.

ABB can also perform loop back at the transmission line, so that in the case of

power failure at the last level BTS, ABB will loop back the E1 signal for BSC to

detect the quality of the entire transmission link.

Functions of ABBFunctions of ABB

Sites 1 Sites 2 Sites 3

ABBBSC

TMU

ABB

TMU

ABB

TMU

22 Internal Use

ABB (optional)ABB (optional)

Digit 1 Digit 2 Digit 3 Digit 4 Detailed indication

OFF OFF X XNot end site, transmission terminal loopback not sup

ported (default setting)

ON ON X XEnd site, transmission terminal loopback supported

Caution:

The “X” means that the status of switch has no relation with the DIP function.

S2 is not allowed to set as any status apart from the above two .

23 Internal Use

TMUTMU

Provide E1 connection interface

Provide channel multiplexing and flexible networking modes

Provide Man-machine interface (MMI) and operation &

maintenance link

Provide centralized BTS clock

Provide alarm signal input ports

Functions of TMUFunctions of TMU

24 Internal Use

Indictors on TMUIndictors on TMU

Indicator Name

Color Meaning Explanation Normal State

PWR Green PowerOn: Normal

Off: AbnormalOn

RUN Green Running StateFlash(0.5Hz): Normal

On or Off: AbnormalFlash

LI1,2,3,4 GreenE1 Transmission

On: Local Alarm

Flash: Remote Alarm

Off: Normal

Off

M/S GreenMaster/Slave indication

Slow flash(1HZ): Master

Quick flash(2Hz): Slave

Master Board: Slow flash

Slave Board: Quick flash

PLL GreenPhase identification indicator

On: Free oscillation

Quick flash(4Hz): Catching

Slow flash(1Hz): Locked

Off: Abnormal

Slow flash

TMU

MMI

T13M

FCK

T2M

DBG

RST

PWR

M/S

RUN

LI1

LI2

LI3

LI4

PLL

25 Internal Use

Temperature Adjustment SystemTemperature Adjustment System

The heat dissipation and heating under low temperature of

outdoor BTS3012A are accomplished by temperature adjustment

system. The temperature adjustment system has high reliability

performance and reports alarms when faults occur. The

temperature adjustment of BTS3012A is accomplished by the air-

conditioner or the heat exchanger.

26 Internal Use

Chapter 1 Overview




27 Internal Use

TRXTRX

Baseband speech processing

Um and Abis interface signaling processing

Modulation and demodulation

RF signal amplification

Functions of TRXFunctions of TRX

28 Internal Use

TRX Module StructureTRX Module Structure

TBPU:TRX Baseband signal Processing Unit RPU:RF signal Processing Unit

SCP: Signaling Processing Unit DSP: Digital Signal Processing Unit

CUI: Carrier Unit Interface

TDP: Transmitter Driver and PLL Unit PAU: Power Amplifier Unit

RCU: Receiving Unit

DBUS: Data Bus CBUS: Control Bus

TBUS: Timing Bus

FH_BUS: Frequency Hopping Bus

PAU Transmitter

DBUS

TBUS

SCP CUI

Clock processing partClock processing part

TBPU

DSP

FH_BUS

TDP

RCU

RPU

Receiver

Diversityreceiver

CBUS

29 Internal Use

Output Power of TRXOutput Power of TRX

Normal: 40W(46dBm) or 60W(48dBm)

PBU: 80W(49dBm)

EDGE TRX: GMSK: 60W, 8PSK: 40W

30 Internal Use

When the standing wave ratio at the power amplifier output port

exceeds 1.5, it reports standing wave alarm to the baseband unit

When the temperature of the power amplifier exceeds 85 , the p℃ower amplifier unit reports the over-temperature alarm via the bas

eband unit, and automatically turns off the power amplifier

Over standing wave alarmOver standing wave alarm

Over-temperature alarmOver-temperature alarm

Alarms of TRXAlarms of TRX

31 Internal Use

Indicators on TRXIndicators on TRX

Indicator Name

Color Meaning ExplanationNormal State

PWR Green PowerOn: Normal

Off: AbnormalOn

RCP GreenSCP Running State

Flash(0.5Hz): Normal

On or Off: Abnormal

Flash

RDP GreenDSP Running State

Flash(0.5Hz): Normal

On or Off: Abnormal

Flash

FAIL RedAlarm Indicator

On: Alarm

Off: No alarmOff

TX OUT

PWR

RCP

RDP

FAIL

RST

MMI

RXA IN

RXB IN

TRX

32 Internal Use

CDUCDU

Combine and filter transmitted signals

Filter ,amplify and distribute received signals

Provide power for the tower-top amplifier

Alarm detection

Functions of CDUFunctions of CDU

33 Internal Use

CDU StructureCDU Structure

Combiner

Divider

Divider

DuplexerTX1

TX2

TX-COMBTX-DUP

RX1RX2RX3RX4

HL-out

RX6RX7RX8

RX5

HL-in

RXD-ANT

TX/RX-ANT

RXD-out

LNA

LNA Filter

34 Internal Use

Indicators on CDUIndicators on CDU

Indicator Name

Color Meaning ExplanationNormal State

POWER Green PowerOn: Normal

Off: AbnormalOn

VSWR1 YellowStanding wave ratio alarm

On: VSWR is greater than 1.5 and less than 2.5

Off: Normal

Off

VSWR2 RedStanding wave ratio alarm

On: VSWR is greater than 2.5

Off: NormalOff

TTA RedTTA current indication

On: TTA current out of range

Off: NormalOff

LNA RedLNA current indication

On: LNA current out of range

Off: NormalOff

35 Internal Use

Rear Panel of CDURear Panel of CDU

MAIN: TTA power feeding selection knob of main receiving channel

DIVERSE: TTA power feeding selection knob of diversity receiving channel

FUSE :1.5A

Setting MAIN DIVERSE Unit

0 off off

1 100 65 mA

2 107 100 mA

3 205 205 mA

Correspondence between knob setting and current strength of TTA

Note: MAIN is recommended to be set at 1(100mA),and DIVERSE to be set at 2(100mA).Other modes of setting are not recommended

36 Internal Use

Alarm DetectionAlarm Detection

VSWR (Voltage Standing Wave Ratio) monitoring: CDU Monitors the

status of antenna system. When the detected standing wave ratio

exceeds the preset threshold (1.5 or 2.5), CDU will generate

corresponding alarms

Low noise amplifier fault alarm: The signal is extracted from the

power supply current of the low noise amplifier. When the current

exceeds a certain level ,alarm signals are generated

Tower-top amplifier alarm: When there is a tower-top amplifier on

service, the CDU monitors the status of tower-top amplifier by its

working current. If the current exceeds a certain level , alarm signals

are generated

37 Internal Use

EDUEDU

EDU indicators are the same as EDU indicators are the same as those of CDUthose of CDU

Divider

DuplexerTX1

RX1RX2

TX/RX-ANT1

Divider

DuplexerTX2

RX3RX4

TX/RX-ANT2

LNA

LNA

38 Internal Use

SCUSCU

Four carriers are combined and output through 3dB bridges and the insertion loss is 6.8dB

Tx_Comb

TX4

TX3

TX2

TX1

3dB

Bridge

3dBBridge

3dBBridge

39 Internal Use

Chapter 1 Overview




40 Internal Use

S1/1/1S1/1/1

TX OUT

RXA

RXB

DUP

1:4

1:4

TX/RX ANT

TX

RX

HL OUT

HL IN

COMB

TX COMB

TX DUP

RXD OUT

RXD ANT

(RXB)

(TX/RXA)

41 Internal Use

S2/2/2S2/2/2

TX OUT

RXA

RXB

DUP

1:4

1:4

TX/RX ANT

TX OUT

RXA

RXB

TX

RX

HL OUT

HL IN

COMB

TX COMB

TX DUP

RXD OUT

RXD ANT

(RXB)

(TX/RXA)

42 Internal Use

S4/4/4 2CDUS4/4/4 2CDU

Duplexer

Distributor Distributor Distributor DistributorCombiner Combiner

Duplexer

43 Internal Use

S4/4/4 SCU+CDUS4/4/4 SCU+CDU

TX OUT

RXA

RXB

TX OUT

RXA

RXB

TX

COMB

TX COMB

TX OUT

RXA

RXB

DUP

1:4

1:4

TX/RX ANT

TX OUT

RXA

RXB

TX

RX

HL OUT

HL IN

COMBTX COMB

TX DUP

RXD OUT

SCU

RXD ANT

(TX/RXB)

(RXA)

CDU

44 Internal Use

2CDU+SCU2CDU+SCU

Duplexer Duplexer

Combiner Combiner DistributorDistributorDistributor Distributor Combiner Combiner

Combiner

45 Internal Use

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 ArresterLightning Arrester

Lightning Arrester

46 Internal Use

Types of Main FeederTypes 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

47 Internal Use

TTA (Optional)TTA (Optional)

The tower-top amplifier is installed close to the receiving antenna

It can be used to increase the receiving sensibility of the base statio

n

Consisting of:

Simplex TTA

Duplex TTA

Triplex TTA

48 Internal Use

TTA (Optional)TTA (Optional)

antenna

simplex TTA duplex TTA triplex TTA

Low noise amplifier

TX filter

bypassBias TeeBTS

triplex TTA

DC

RX filterRX filter

49 Internal Use

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

50 Internal Use

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

51 Internal Use

SummarySummary

Functions and features of BTS BTS hardware structure Antenna and feeder system

SummarySummary

ome201102 gsm bts3012a hardware structure issue1.0

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