BTS INSTALLATION AND COMMISSIONING

BASIC HARDWARE COMPONENTS

ANTENNA

Use of direction antenna for directed radiation pattern Use of actuator for electric tilt Used antenna-RET(Remote Electric Tilt) tri-band antenna

pair of feeder cable used cable for transmitting and receiving purpose indicated with label as

RRU(REMOTE RADIO UNIT) includes a cyclic prefix (CP) module with a CP adder for downlink

channel processing and a CP remover for uplink channel processing can be configured to communicate with a base band unit (BBU) via a

physical communication link and can communicate with a wireless mobile device via an air interface

provides the analog radio frequency functions performs, digital-to-analog (D/A) conversion , up conversion , on/off

control of each carrier , carrier multiplexing , channel filtering, power amplification and limiting ,RF filtering

power supplied through power cables optical fibres used for signal carriage

BBU(BASE BAND UNIT)o a digital signal processor to process forward voice signals for

transmission to a mobile unit and to process reverse voice signals received from the mobile unit

o provides the radio functions of the digital baseband domaino is responsible for communication through the physical interface o characteristics: modular design, small size, low power consumption

and can be easily deployedo perform backhaul transport processing;MAC layer processing;

channel coding, interleaving, and modulation ; MIMO processing ; transmit power control of each physical channel ; frame and slot signal generation ; IFFT modulation; and adding CP

BBU consists of PM(Power Module) provides power to BBU SA(Site Alarm Module) integrates the functions of environment monitoring and E1 interface CC(Control and Clock Module) provides switching of media stream and control stream, processing clocks and

managing subracks FS(Fabric Switch Module) provides interfaces to connect with the RRU module BPC(Baseband Processing Board Type C) Baseband board for WCDMA UBPG(Universal Baseband Processor for GSM) baseband board of GSM FA(Fan Module) used for heat dissipation

LPU

DDF(DIGITAL DISTRIBUTION FRAME)

IDU(INDOOR UNIT)o Providing the Data interface, Error correction, Modulation and

Demodulation, Alarm status monitoring and Site-to-site communications

ODU(OUTDOOR UNIT) ODU converts data from the IDU into an RF signal for transmission Vertical polarization(V) used for microwave transmission IF(intermediate frequency) cable used for connecting ODU and IDU

MICROWAVE ANTENNA

Connected with ODU Mounted on pole by maintaining line of sight for microwave link

POWER SUPPLY Batteries used as power supply for BTS Batteries charged through 3-phase AC mains, diesel generator or solar

panels

-

+ -

-48v

12 v1

12 v21

12 v 12 v

12 v12 v12 v12 v

+

Battery rack used for battery placement

CABLE USED Feeder cables-used between antenna and RRU Optical fibres-used between RRU and BBU IF cables-used between ODU and IDU Power cables-used for providing power supply Grounding cables-used for grounding of each and every components