BTS configurationDate: July 08,2009Chinmay AnandEngineerMobile Services Directorate

BTS ConfigurationBTS configuration is determined by the traffic volume and the traffic distribution.BTS configuration is associated with the number of the TRXs and the antenna system.BTS can be omni directionalBTS can be sectored.Number of TRXs can vary from site to site and that number determines the BTS configuration of that site.

BTS Configuration BTS supports the following cell configurations- Omni cell- One sector cell- Two sectors cell- Three sectors cell

BTS ConfigurationBTS configuration is presented as S1/1/1 where S means sector Above configuration shows that the BTS is sectored.It has 3 sectors and each sector has 1 TRX.S2/3/2 means BTS has 3 sectors.First sector has 2 TRXs, second sector has 3 TRXs and third sector has 2 TRXs

BTS ConfigurationBTS configuration can be S2 where the BTS is sectored with only one sector having only two TRXs.BTS configuration can be S3/3 where the BTS has two sectors with each sectors of 3 TRXs.

BTS ConfigurationOmnidirectinal BTS is presented as O2 where the BTS has only 2 TRX.Similarly O4 means the BTS is omnidirectional with 4 TRXs.O1 means omnidirectional BTS with only one TRX.

BTS ConfigurationSupports the omni directional and directional coverageCombination of two cabinets to form one group Combination of three cabinets to form a group.One single cabinet supports upto 12 TRXs in the full configuration.

Configuration PrincipleUse as few as possible cabinets for cell configurationsAll TRXs of a cell are configured in the same cabinetTRXs 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

Configuration PrincipleIn full configuration, the BTS configuration will be O36 or S12/12/12.The Transmit power will be 40W or 80W.For 40W the maximum configuration is S12/12/12 or O36But for 80W BTS, additional modules called power amplifier (PA) are required so the capacity of the BTS decreases and BTS maximum configuration will be S6/6/6 or O18.

for 40W for 80W

BTS hardware configurationFirst sectorSecond sectorThird sector

V3 BTS

Sector configurationFirst SectorThird SectorSecond Sector

Second SectorFirst SectorThird Sector

BTS1BTS2BTS3

BTS hardware configurationCMMPDMFCMTRM1TRM2...TRM12AEMBSCAbisMMIAbis Inter-faceUm Inter-faceMS

Mainly Modules of BTSCMM:Controller & Maintenance Module

TRM:Transceiver Module

AEM:Antenna Equipment Module

FCM:Fan Control Module

PDM:Power Distribute Module

Modules of BTS

CMM module functions

BS interface functions Providing various clocks needed by BS Operation & maintenance function of BTS Equipment alarm collection Active/standby hot backup

Introduction of TRM Diversity ReceiverReceiver handle TransmitterIndicator lightReset

TRM panel description

AEM module

Introduction of CDU (2)Distribution Extension OutputIndicator lightDistribution Output Combiner InputTest interfaceAntenna

CDU Panel

LED PositionColorNameMeaningWorking Mode1GreenFPOForward power output LEDON: NormalOFF: Abnormal2RedSWR1VSWR level-1 alarm LEDON: There is an alarmOFF: There is no alarm3RedSWR2VSWR level-2 alarm LEDON: There is an alarmOFF: There is no alarm4GreenPWRLNA power supply LEDON: NormalOFF: Abnormal5RedLNALNA alarm LEDON: There is an alarmOFF: There is no alarm

Introduction of CDU (1)

CDU Functional Structure

IdentifierFull NameMeaningETXExtended TX Extended TX portTX1Transmitter 1Combiner input 1 (PA output signal)TX2Transmitter 2Combiner input 2 (PA output signal)RX1Receiver 1Low noise amplifier output port 1RX2Receiver 2Low noise amplifier output port 2RX3Receiver 3Low noise amplifier output port 3RX4Receiver 4Low noise amplifier output port 4ERX1Extend Receiver 1Low noise amplifier extended output port 1ERX2Extend Receiver 2Low noise amplifier extended output port 2ANTAntennaAntenna feeder port

Introduction of CEU (1)

Introduction of CEU (2)combiner InputIndicator lightCombiner OutputDistribution Output Distribution Extension Output

CEU Functions

IdentifierMeaningDescriptionOTX1Output TX 1Combiner TX output port 1OTX2Output TX 2Combiner TX output port 2TX1Transmitter 1Combiner input 1 (PA output signal)TX2Transmitter 2Combiner input 2 (PA output signal)TX3Transmitter 3Combiner input 3 (PA output signal)TX4Transmitter 4Combiner input 4 (PA output signal)RX1Receiver 1Splitter output port 1RX2Receiver 2Splitter output port 2RX3Receiver 3Splitter output port 3RX4Receiver 4Splitter output port 4ERX1Extend Receiver 1Splitter input port 1 (low noise amplifier extended output)ERX2Extend Receiver 2Splitter input port 2 (low noise amplifier extended output)

Basic Configuration

Sum of Carrier(one cell)Sum of CDUSum Of CEU120220320420521621

Sum of Carrier(one cell) Sum of CDUSum of CEU722822941104111421242

Basic ConfigurationTX/RXTX/RXTRM1TXRXRXDCDUTX1TX2RX1RX2RX3RX4CDUTX1TX2RX1RX2RX3RX4O1

Basic ConfigurationTX/RXTX/RXTRM1TXRXRXDTRM2TXRXRXDCDUTX1TX2RX1RX2RX3RX4CDUTX1TX2RX1RX2RX3RX4O2

Basic ConfigurationTX/RXTX/RXTRM1TXRXRXDTRM2TXRXRXDCDUTX1TX2RX1RX2RX3RX4CDUTX1TX2RX1RX2RX3RX4TRM3TXRXRXDO3

Basic ConfigurationO4

DTRU Panel Indicators

IdentifierFull NameMeaningPWRPowerPower LEDRUNRunRunning LEDMODModelBCCH mode LEDACT1ActiveChannel activation LED1ACT2ActiveChannel activation LED2STAStateStatus LEDRSTResetReset button

IdentifierMeaningRXM1Receiver 1RXD1Receiver 1 (for diversity)RXM2Receiver 2RXD2Receiver 2 (for diversity)TX1Transmitter 1TX2Transmitter 2

O1 configurationCDUTX1RX1RX2RX3RX4ANTERX1ERX2TX2ETXCDUTX1RX1RX2RX3RX4ANTERX1ERX2TX2ETXDTRUTX1TX2TXCOMRXM1RXD1RXD2RXM2TX/RXTX/RX

O1 implementationM

CDUTX1RX1RX2RX3RX4ANTERX1ERX2TX2ETXCDUTX1RX1RX2RX3RX4ANTERX1ERX2TX2ETXDTRUTX1TX2TXCOMRXM1RXD1RXD2RXM2TX/RXTX/RXO2 Configuration

O2 Configuration Board

O3 configurationCDUTX1RX1RX2RX3RX4ANTERX1ERX2TX2ETXCDUTX1RX1RX2RX3RX4ANTERX1ERX2TX2ETXDTRUTX1TX2TXCOMRXM1RXD1RXD2RXM2TX/RXTX/RXDTRUTX1TX2TXCOMRXM1RXD1RXD2RXM2

CDUTX1RX1RX2RX3RX4ANTERX1ERX2TX2ETXCDUTX1RX1RX2RX3RX4ANTERX1ERX2TX2ETXDTRUTX1TX2TXCOMRXM1RXD1RXD2RXM2TX/RXTX/RXDTRUTX1TX2TXCOMRXM1RXD1RXD2RXM2O4 Configuration

CDUETX1TX1TX2ANTERX2RX2RX3RX4ERX1RX1RTEDTRURXM1TX1TX2TX-COMRXD1RXM2RXD2CDUETX1TX1TX2ANTERX2RX2RX3RX4ERX1RX1RTECDUETX1TX1TX2ANTERX2RX2RX3RX4ERX1RX1RTEDTRURXM1TX1TX2TX-COMRXD1RXM2RXD2CDUETX1TX1TX2ANTERX2RX2RX3RX4ERX1RX1RTEDTRURXM1TX1TX2TX-COMRXD1RXM2RXD2O4 Configuration- Board implementation

O6 configuration

BTS_TYPE1100: B80181101: B81121110: M82021111: M8204BTS_NONo. of the cabinet of the same site 00: Basic cabinet01: Extended cabinet 110: Extended cabinet 2SLAVE1_PORTThe E1 port of the basic cabinet to connect extended cabinet 1 00: Port E of the basic cabinet01: Port F of the basic cabinet10: Port G of the basic cabinet11: Port H of the basic cabinetSLAVE2_PORTThe E1 port of the basic cabinet to connect extended cabinet 2 00: Port E of the basic cabinet01: Port F of the basic cabinet10: Port G of the basic cabinet11: Port H of the basic cabinetSATEWhether to use the satellite Abis link or not 0: Common Abis1: Satellite AbisABIS_PORTO&M port number 00: Port A01: Port B10: Port C11: Port DABIS_TSThe O&M LAPD timeslot on the Abis interface 000: TS16001: TS31010: TS30011: TS29100: TS28101: TS27110: TS26111: TS25ID Switch

14

13

3

4

5

6

7

8

9

10

11

12

15

0

1

2

BTS_TYPE

BTS_NO

SLAVE1_PORT

SLAVE2_PORT

SATE

ABIS_PORT

ABIS_TS

BTS 312-Huawei

CDU for BTS 312

TRX for 312 BTS

O1 configurationantennaantenna

TRX for 312 BTS

BTS 3012-Huawei

BTS 3012-Huawei

DTMU

DTRU

DDPU

O2 configuration

O4 configuration

E1 connectionsThe abis interface may be of 3 types Optical fiber network Microwave DSL TechnologySatellite

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