Alcatel BTS Presentation Complete Updated

Alcatel BTS Training Program

Alcatel BTS Training Program

Khalid Mahmood (RYK-222)

The BTS provides two-way radio communication between the PSTN and Mobile Station (Mobile Set) located in a single GSM cell. It also provides a similar link between the mobile station and the rest of the networks. The BTS provides on interface for the digital baseband signals used by the land based networks and the GSM radio signals used by mobile station.

BTS Role in GSM Network

Logical position of BTS in BSS

For system incorporating GPRS some additional components are required as shown the below figure. An MFS is placed in the system between the BSC and SGSN. The MFS contains a number of PCUs, one of which controls all the GPRS activity for the one cell.

BTS in BSS with GPRS

Logical position of BTS in BSS with GPRS

A serving GPRS support node (SGSN) is responsible for the delivery of data packets from and to the mobile stations within its geographical service area. Its tasks include packet routing and transfer, mobility management (attach/detach and location management), logical link management, and authentication and charging functions. The location register of the SGSN stores location information (e.g., current cell, current VLR) and user profiles (e.g., IMSI, address(es) used in the packet data network) of all GPRS users registered with this SGSN.

SGSN (serving GPRS support node)

Functional Architecture of BTS

Channel OrganizationRF signals over the Air interface carry traffic and signaling/Control channels which are organized according to GSM recommendations. The allocation and control of these channels are managed by the BTS functions.Radio Resource Management function controls and organize radio resources to meet current operational needs of both the networks and individual.

Functional Architecture of BTS

As the principal interface between the PSTN and Mobile Stations, the BTS performs four primary functions. Transmission function, which manage the transfer of traffic and control data between the BTS and BSC.Telecommunication functions, which manage the transfer of traffic and control data between the BTS and Mobile Station.O&M function, which supervise the operation of the BTS.Support function, which provides a logical and physical environment in which the BTS functions can be realized.

BTS Functions

Communication between the transmission, telecommunication, and O&M functions is managed according to the OSI model. The BTS functions are concerned with layer 1 (Physical), Layer 2 (Data Link), and Layer 3 (Network) of this

model.

To minimize operating costs, all data passed between the BTS and BSC in Time division multiplexed onto a single physical interface. This is the Abis Interface, which carries all the data sent between the BSC and BTS. Logical links between the BSC and BTS handles the following information:

Transmission Functions

Signaling data used for control purposes

O&M data for the BTS transmission module

O&M data for the BTS entities

User data in the form of speech and data traffic.

For BTS and BSC multiplexing equipment is normally connected using dedicated cabling. Other method of Abis Interface connection can be used for BTS, where the installation of the dedicated cabling in not possible. In this case, control of the transmission medium is in the hands of third party.

Abis Interface:

Microwave Link (used where line of sight radio path is available.

Leased Line (Copper Cable or Fiber Optic used where the

distance between the BSC and BTS is too great for microwave).

Satellite Link (Used where Previous two methods are not

possible)

There are two primary telecommunication functions:

Telecommunication Function

Based band funcations modulate and encode traffic and signaling data from the BSC according to GSM recomendaitos. This data is then sent to the Mobile Stations using the RF function. Traffic and signaling received from the Mobile Stations is demodulated and decoded to recover the baseband data.

Baseband Functions:

Telecommunication Function

RF functions enable traffic and signaling to be sent and received over the Air Interface as a radio signal. A special link layer protocol ensures the reliable transfer of signaling data over the Air Interface.For antenna Diversity, the telecommunication function uplink path is duplicated. The duplicated functions intend from the antennas, through the RF functions.

RF Function:

O&M Functions

O&M functions monitor and control the correct operation of the BTS and its external interfaces. These function are shared between the BTS and BSC. The BSC provides overall control.The O&M function use Layer 2 links for BTS internal communications. A terminal connected via an MMI is used for local operator control of the BTS.

There are four categorized of O&M function:Configuration ManagementFault ManagementDedicated Alarm and Control HandlingExternal Alarm Handling.The O&M function also control the operation of the RF self-tests and manage the actions required by the BTS recovery Strategy.

Support Function

The support function provides a number of services relevant to the internal working of the BTS are:

Clock generation and distribution.

External alarm collection.

Internal self tests.

Introduction of Alcatel BTS

Introduction of Alcatel BTS

BTS Circuit Breakers (BCB)

Network Interface Card

External Alarm Circuit Board (EACB)

Shelf # 5

Shelf # 4

Shelf # 3

Shelf # 2

Shelf # 1

Combiners

TRE

SUMA Card


Network Interface Card BTS Circuit Breakers (BCB)

BTS Circuit Breakers (BCB)

Network Interface Card

Transmitter Connector

Antenna Connector

Lock Fastener

Module Extractor

Receiver Connector

Equipment Label

Lock Fastener


Module Extractor

Receiver Connector

Antenna Connector

Equipment Label

Lock Fastener


Module Extractor

Equipment Label

ON/OFF Switch

USB Test Connector

Receiver Connector

LEDs

Abis ½ Connector

Lock Fastener

Equipment Label

BTS ConnectionArea Connector

BTS Terminal Connector

Test Connector

USB Connector

LEDs

SUMA Card Basic Architecture

Remote Inventory Cable(RI Cable)

Cabinet Cooling Fan

Connect to Alcatel BTS Using BTS-Terminal

release B9

Connect to Alcatel BTS Using BTS-Terminal

release B9

User Name(COMMTE)

Password(COMMTE)

Press Baud rate button to set it

Select Baud rate = 19200

Select the appropriate COM Port

Press F2 OR “Connect/Disconnect” button

OR File->Connect/Disconnect from menu

Following windows will open on establishing successful connection

Menu bar will be changed on establishing successful connection

Monitor Active Alarm

External Active Alarms Show Here

Show Hardware Configuration (Ctrl H)

Select Appropriate Module

Select OK

Select All

SUMA Card = OMU 1 Rack A (BTS Cabinet # 1)

Shelf # 2

Slot # 7

SBL Module States (F5) SBL Module States (F5)

VSWR Value=1.2

VSWR Value=1.1

Antenna 0=A

Antenna 1=B

RA 1= Combiner 1 Sector A

SBL Management

SBL Management Read Initialize

Disable

RestartReset

Select Module

Execution Result

Selected Module Type

State of the Module (NEQ/OPR/IT)

Modify Hardware Configuration Remove Module

Select Module to Remove

End Modification of HW Configuration

Following window appears(Cabling Detection in Progress)

Click Yes

OFF Line Commissioning

Procedure

OFF Line Commissioning

Procedure

Switch OFF the BTS cabinet and disconnect Abis

connectors from DDF before offline start

Disconnect the Abis connector from The DDF

Switch ON the BTS cabinet breakers and connect the Laptop at the BTS Terminal

using MMI Cable

User Name(COMMTE)

Password(COMMTE)

Press F2 OR “Connect/Disconnect” button

OR File->Connect/Disconnect from menu

Following windows will open on establishing successful connection

Menu bar will be changed on establishing successful connection

Restore Default

Warning Window appearsClick OK to Restore SUMA

Card

Verify Qmux addressPress “Yes” to change it

Confirm Qmux address from OMCR first

Go toCommissioning->Download->BTS-SW

to download BTS software

Edit New Qmux address Press “Put” button to update

Updating Qmux address

Press Browse to select the path of “BM1SAW19.MSF” file

Path Selection Window

Press Browse to select the path of “AGC3AVWa.DDL” file

Software download in ProgressIt may take up to 30 minutes

Initialization window open when download complete

Receiving data window open

Select appropriate option from Frequency Brand dropdown menu1- Select GSM for GSM cabinet

2- Select DCS1800 for DCS cabinet3- Select GSM for GSM+DCS

(Combined) cabinet

Don’t uncheck Bridge check option and don’t change Sectors numbersPress “Save” button in Sector

mapping window

Updating flash

Press Save in TMA Setting window

PressSettings->Transmission->Initial Settings

Verify Baud Rate = 1200

Verify Environment Abis1 = Chain – end position

Verify CRC Check = ON

Reconfirm the Qmux address

Check Line impedance for Abis1 & Abis2 = 75ohm

PressSettings->Transmission->Board Settings

Uncheck all TREs press “Transmit” button

PressCommissioning->Initialization->All Sectors

to initialize BTS

Initialization of Commissioning in progress

PressCommissioning->Station Unit Test

for Station Unit Test

Select “Internal Loop”

“Station Unit Test” in progress

Following Results on successful completion

Select External Loop(Make Sure that the Abis # or 2 must be looped at DDF

Abis # 1 Loop test failed because Abis # 1 not Looped at DDF

Result window appears

Now switch on the BTS cabinet breakers and through the site

Reconnect the Abis connector at DDF by verifying the TX/RX

cables properly

Reconnect the Abis connector at DDF by verifying the TX/RX

cables properly

Best WishesOFF Line Commissioning is

Done Successfully

Best WishesOFF Line Commissioning is

Done Successfully

Alcatel GlossaryA

AN Antenna Network BBCB BTS Control BusBSII Base Station ControllerBSS Base Station SubsystemBTS Base Station TransceiverBTSW BTS-Terminal for Windows

Alcatel GlossaryC

CCF Cabinet Cooling FanCDM Configuration Data MessageCLEI Common Language EquipmentCLLK Clock LinkCPF Configuration Parameter FileCRC Cyclic Redundancy CheckCU Carrier Unit

Alcatel Glossary

DDC Direct CurrentDMA Deferred Maintenance Alarm

EEQU Equipped

Alcatel GlossaryF

FIA Format Identifier for Application part of RIFIM Format Identifier ManufacturingFIT Faulty In TrafficFLT FaultyFOS Faulty Out of Service

Alcatel GlossaryI

ICS Item Change StatusIT In Traffic LLDA Local Defence ActionLRA Local Recovery Action

Alcatel GlossaryM

MI Maintenance InformationMSA MSD AutoMSD Maintenance Seized

NNEQ Not EquippedNOP Not Operational

Alcatel GlossaryO

O&M Operation and MaintenanceOMU Operation and Maintenance UnitOMUA OMU A RITOMUB OMU B RITOP OperationalOPR Operator

Alcatel GlossaryP

PADD Physical AddressPMA Prompt Maintenance Alarm

RRA Radio AccessRF Radio FrequencyRFH Radio Frequency Hopping ( also known as : Synthesizer Hopping )RI Remote InventoryRIT Replaceable ItemRX Receiver or receive .....RTC Remote Tunable Combiner

Alcatel GlossaryS

SBL Security Block LevelSCFE Station Unit Control Function Entity RITSOS System Out of ServiceSUM Station Unit ModuleSUMP SUM PCM RITSW Software

Alcatel GlossaryT

TLV Tag, Length, ValueTRE Transceiver Module (combined Transmitter / Receiver functionality for base band and RF signals)TS TimeslotTX Transmitter or transmit .....

Alcatel GlossaryV

VPMA Very Prompt Maintenance AlarmVSWR Voltage Standing Wave Ratio

WWBC Wide Band CombinerWTC Wait Traffic Clear

XXBCB External BCBXCLK External ClockXIOB External Input Output Board

Alcatel BTS Presentation Complete Updated

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