ultra ppt
TRANSCRIPT
ULTRA SITE BASE STATION OVERVIEW
CONTENTS :• Ultra BTS structure.• Various units , cards and there
functions.• Ultra BTS cabling and connections.• Ultra BTS commissioning .• Drawbacks.
Power Supply• DC (1-3) • AC (1-2)TRX BB units (1-6)
TRX RF units• GSM (0-12)• EDGE GSM (0-12)
Receiver Multicouplers
• 2-way (0-6)• 6-way (0-2)
Base Operations and Interface Unit (1)
Transmission Units (1-4)
Combiners & Duplex Filters•duplexer(upto6)•Combiner:•(2 way)&(6 way)
NOKIA ULTRA BTS
POWER 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)
TRX BASE BAND UNIT :
BB2F 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.
BOIA UNIT :
3 colour status LED
TDMA frame clock
Monitor Interface
Site Reset
Local Management Port
13 MHz
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
TRANSMISSION 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
FC E1/T1:
3 colour status LED
RX (75 )TX (75 )
TX/RX (100 /120 )
FXC E1 Transmission Unit3 colour status LED
IF1 TXIF1 RX
IF2 TXIF2 RX
IF3 TXIF3 RX
IF4 TXIF4 RX
FXC E1/T1 Transmission Unit3 colour status LEDIF1 TX/RX
IF2 TX/RX
IF3 TX/RX
IF4 TX/RX
FXC RRI Transmission Unit
3 colour status LED
Flexbus 2
Flexbus 1
Power LED Flexbus 2
Power LED Flexbus 1
TRX CARDS :
Front view
TRX 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.
DUPLEXER 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.
MULTICOUPLER:• 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.
2 WAY MULTICOUPLER:
COMBINERS :• 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)
2-WAY & 6-WAY COMBINER:
99614773
CABLING :• For configuration (4+3+1) : TRX CARDS : “8”PWSB CARDS : “3” BB2F CARDS : “5” BOIA CARD : “1” DUPLEXER : “3” MULTICOUPLER : “5”(2-WAY) COMBINER : “3”(2-WAY)
SECTOR 1
SECTOR 2
SECTOR 3
SHARING CONCEPT :• Consider configuration “3+3”TRX CARDS : “6”PWSB CARDS : “2” BB2F CARDS : “4” BOIA CARD : “1” DUPLEXER : “1”(SHARED) MULTICOUPLER : “4”(2-WAY) COMBINER : “4”(2-WAY)
COMMISSIONING :• 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.
DRAWBACKS :
• 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.