2.
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
4. 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
6. 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)
8. Channel Organization
RF 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
9. 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.
61. Select appropriate option from
Frequency Brand dropdown menu
1- Select GSM for GSM cabinet
2- Select DCS1800 for DCS cabinet
3- Select GSM for GSM+DCS
(Combined) cabinet
62. Don’t uncheck Bridge check option
and don’t change Sectors numbers
Press “Save” button in Sector
mapping window
76. Abis # 1 Loop test failed because Abis # 1 not Looped at DDF
Result window
appears
77. Now switch on the BTS
cabinet breakers and
through the site
78. 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
79. Best Wishes
OFF Line Commissioning is
Done Successfully
Best Wishes
OFF Line Commissioning is
Done Successfully
80. Alcatel Glossary
A
AN Antenna Network
B
BCB BTS Control Bus
BSII Base Station Controller
BSS Base Station Subsystem
BTS Base Station Transceiver
BTSW BTS-Terminal for Windows
81. Alcatel Glossary
C
CCF Cabinet Cooling Fan
CDM Configuration Data Message
CLEI Common Language Equipment
CLLK Clock Link
CPF Configuration Parameter File
CRC Cyclic Redundancy Check
CU Carrier Unit
83. Alcatel Glossary
F
FIA Format Identifier for Application
part of RI
FIM Format Identifier Manufacturing
FIT Faulty In Traffic
FLT Faulty
FOS Faulty Out of Service
84. Alcatel Glossary
I
ICS Item Change Status
IT In Traffic
L
LDA Local Defence Action
LRA Local Recovery Action
86. Alcatel Glossary
O
O&M Operation and Maintenance
OMU Operation and Maintenance Unit
OMUA OMU A RIT
OMUB OMU B RIT
OP Operational
OPR Operator
87. Alcatel Glossary
P
PADD Physical Address
PMA Prompt Maintenance Alarm
R
RA Radio Access
RF Radio Frequency
RFH Radio Frequency Hopping ( also known as :
Synthesizer Hopping )
RI Remote Inventory
RIT Replaceable Item
RX Receiver or receive .....
RTC Remote Tunable Combiner
88. Alcatel Glossary
S
SBL Security Block Level
SCFE Station Unit Control Function
Entity RIT
SOS System Out of Service
SUM Station Unit Module
SUMP SUM PCM RIT
SW Software
89. Alcatel Glossary
T
TLV Tag, Length, Value
TRE Transceiver Module (combined
Transmitter / Receiver functionality for
base band and RF
signals)
TS Timeslot
TX Transmitter or transmit .....
90. Alcatel Glossary
V
VPMA Very Prompt Maintenance Alarm
VSWR Voltage Standing Wave Ratio
W
WBC Wide Band Combiner
WTC Wait Traffic Clear
X
XBCB External BCB
XCLK External Clock
XIOB External Input Output Board