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ULTRA SITE BASE STATION OVERVIEW

1CONTENTS :Ultra BTS structure.Various units , cards and there functions.Ultra BTS cabling and connections.Ultra BTS commissioning .Drawbacks.

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Power SupplyDC (1-3) AC (1-2)TRX BB units (1-6)TRX RF unitsGSM (0-12)EDGE GSM (0-12)Receiver Multicouplers2-way (0-6)6-way (0-2)Base Operations and Interface Unit (1)Transmission Units (1-4)

Combiners & Duplex Filtersduplexer(upto6)Combiner:(2 way)&(6 way)

3NOKIA ULTRA BTS

4POWER CARDS :The function of power card is to take -48v and distribute it to various other minor cards.PWSA(AC type)PWSB/PWSC(DC type)There are 3 power cards.One power card support 6TRX cards thus 2 power cards will support 12TRX. (1 card is always for stand by)

5TRX BASE BAND UNIT :

6BB2F FUNCTIONS :It is known as status card for TRX cards.It is basically a DSP(digital signal processor).One BB2F card take care of two TRX cards.BB2F card should be in order for proper operation of TRX.

7BOIA UNIT :

3 colour status LEDTDMA frame clockMonitor InterfaceSite ResetLocal Management Port 13 MHz8

BOIA UNIT FUNCTIONS :It is known as Brain of BTS.It handles all the control functions like :BTS initiallizationOperation & MaintainanceSoftware download(LMP port available)Management of alarmsLogic controlMain clock function

9TRANSMISSION UNITS :Transmission cards is basically a interface for E1/T1 patching.Different types of transmission cards: FC E1/T1 FXC E1/T1 FXC E1 FC RRI FXC RRI

10FC E1/T1:

3 colour status LEDRX (75 )TX (75 )

TX/RX (100 /120 )11

FXC E1 Transmission Unit

3 colour status LEDIF1 TXIF1 RXIF2 TXIF2 RXIF3 TXIF3 RXIF4 TXIF4 RX

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FXC E1/T1 Transmission Unit

3 colour status LEDIF1 TX/RXIF2 TX/RXIF3 TX/RXIF4 TX/RX

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FXC RRI Transmission Unit

3 colour status LEDFlexbus 2Flexbus 1Power LED Flexbus 2 Power LED Flexbus 1 14

TRX CARDS :

Front view15TRX CARDS :One BTS support maximum 12 TRX cards.TRX card functionality is both transmit and receive.One TRX card perform modulation , demodulation and amplification for one RF carrier.Handles both downlink and uplink signal.It basically transmit and receive without any Digital Signal Processing.TRX card depend on BB2F card for DSP.

16DUPLEXER FUNCTIONS:Performs duplex operation of both TX & RX into one antenna.Provide filtering and amplification for both main and diversity signal from antenna.It contains LNA(low noise amplifier) for amplification.

17MULTICOUPLER:It performs signal splitting for both main and diversity signal.Multicoupler is of two types: 2- way 6- way

One multicoupler handles two TRX cards.

182 WAY MULTICOUPLER:

19COMBINERS :It combines two transmitting signals of TRX card and generate one output.Combiners are of two types : 2 way (wide band combiner)6 way (remote tune combiner)

202-WAY & 6-WAY COMBINER:

21CABLING :For configuration (4+3+1) : TRX CARDS : 8PWSB CARDS : 3 BB2F CARDS : 5 BOIA CARD : 1 DUPLEXER : 3 MULTICOUPLER : 5(2-WAY) COMBINER : 3(2-WAY)

22 SECTOR 1

23SECTOR 2

24SECTOR 3

25SHARING CONCEPT :Consider configuration 3+3TRX CARDS : 6PWSB CARDS : 2 BB2F CARDS : 4 BOIA CARD : 1 DUPLEXER : 1(SHARED) MULTICOUPLER : 4(2-WAY) COMBINER : 4(2-WAY)

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27COMMISSIONING :Commissioning is a process of making a BTS ready for operational use.There are three steps for commissioning Nokia BTS : Hardware configurator . Software downloader. Hub Manager.

28DRAWBACKS :Ultra BTS support only 2G technology.Ultra BTS support maximum 12TRX.Ultra BTS has all the pin connections on the back plane. If any of the pin of a particular slot is damaged then that slot becomes useless.

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