5. Flexi BTS EDGE
Introducing Flexi BTS EDGE
Flexi BTS EDGE belongs to Nokia's
UltraSite BTS family;
Modular design;
Enables efficient use of multiple
technologies: GSM/EDGE, WCDMA and
future Wimax support;
Can be installed anywhere,
Indoor/Outdoor;
Withstands temperatures from -33°C
…+50 °C;
1 to 24 TRX in 1-6* sectors;
TRX output power 47 dBm, sensitivity –
115.5 dBm.
5
6. Flexi BTS EDGE
Flexi BTS modules
Module 3 HU, has a height of 3x44.4 ~ 133 mm;
Module 2 HU, has a height of 2x44.4 ~ 89 mm;
Module 1 HU, equivalent height ~ 44.4 mm.
6
133 mm
133 mm
7. Flexi BTS EDGE
Main Modules
System Modules (ESMA)
Also known as the 3HU module;
It is a module used to connect internal/external BTS;
Support up to 12 TRX;
There are several main functions
BTS O&M: download and save BTS SW, manage configuration and clock & Alarm
Ending Abis and BTS O&M
Communication between other modules via Ethernet Switch
Distributing power to all other modules
7
PDU (power
distribution unit)
48V intake
Interchangeable Transport module:8E1
Site support system,FPA
alarms (6), Aux equipment Q1,
Local Management Port (LMP)
6x Ethernet to DTRX or RTC
PDU (power distribution unit)
6x48V to other modules
Out
1xEAC (External
Alarm & Control)
12x alarm
inputs+6x
control outputs
Prin
t
Synchronization
8. Flexi BTS EDGE
Main Modules
Sector Module
As a module of the combination of Dual TRX and Double Duplexer;
One Sector Module needed for one sector.
8
Dual TRX
module
Dual duplexer
module
3HU
9. Flexi BTS EDGE
Main Modules
Dual TRX Modules (EXxA, 2HU)
Includes 2 TRX transceivers used for:
• A standalone TRX module (2 TRX)
• Sector module when combined with Duplexer Module
• Double Power TRX (DPRTX) acts as 1 TRX with power boost to 2.5 Db
DTRX includes:
• BB is the part common to both TRX
• Separate RF for 2 TX and 4 Rx
• 0-2 Wideband combiner (WBC)
Rx for diversity connection:
• 2 RX when using 2 TX on the same sector
• 4 Rx when using 2 TX different sectors
9
4xRX TX 2
0-2xWideband combiners
1xBus
DDU Power 1xPower
TX 1
Phase feedback from WBC (DPTRX)
10. Flexi BTS EDGE
Main Modules
Dual Duplexer Module (ERxA, 1HU)
• ERxA together with Dual TRX form Sector
module
• Match the transmit and receive directions to the
same antenna and feeder
10
4xRX 1 TX 2
TX 1 RX for
external BTS
RX for
external BTS
Ant 1 Ant 2
4xRX 2
Filter
LNA
Spliter
Duplexer
& VSWR
11. Flexi BTS EDGE
Some basic BTS configuration
2 TRx/1Sector
11
LN
A
LN
A
Duplexer
Duplexer
LNA+
Multi-
coupl
er
LNA+
Multi-
coupl
er
Duplexer
Duplexer
Dual
Duplexer
Dual TRX
TX1
RX1Main
Div
RX2Main
Div
TX2
Div
Antennas
X
12. Flexi BTS EDGE
Some basic BTS configuration
3TRx/1Sector
12
Antennas
X
TX1
TX3
RX3 Main
Div
RX4 Main
Div
TX4
Div
WBC
RX1 Main
Div
RX2 Main
Div
TX2
Div
Dual
Duplexer
LNA
LNA
Duplexer
Duplexer
LNA+
Multi-
coupler
LNA+
Multi-
coupler
Duplexe
r
Duplexer
WBC
13. Flexi BTS EDGE
Some basic BTS configuration
13
3TRx/1Sector
Tx1 Tx2
Rx1Main Rx2Main
Tx3
Rx3 Main
Rx3 Div
14. Flexi BTS EDGE
Some basic BTS configuration
Monday, March 6, 2023 14
Antennas
X
TX1
TX3
RX3 Main
Div
RX4 Main
Div
TX4
Div
WBC
RX1 Main
Div
RX2 Main
Div
TX2
Div
Dual
Duplexer
LNA
LNA
Duplexer
Duplexer
LNA+
Multi-
coupler
LNA+
Multi-
coupler
Duplexe
r
Duplexer
WBC
4 TRx/1 Sector
15. Flexi BTS EDGE
Some basic BTS configuration
4 TRx/1 Sector
15
Rx1Main Rx2Main
Tx3
Rx4 Main
Rx3 Main
Tx1 Tx2
Tx3 Tx4
16. Overview of BSC3i
General structure of BSC3i;
Functions of BSC3i;
Hardware card structure;
Traffic flow and BTS management.
16
17. Overview of BSC3i
General structure
17
GSWB is a non-congestion switching
matrix, used to connect voice and
signaling channels between interface A
and Abis .
BCSU is the LAPD and SS7 . signaling
processing block
MCMU is the GSWB control block, and
also assumes the function of managing
radio resources
OMU is the maintenance and operation
block, considered as an intermediary
block between the user and the BSC
PCU is the block responsible for the
packet function, handling GPRS traffic
ET digital trunk termination block in
BSC, connecting to Abis and Ater .
interfaces
18. Overview of BSC3i
General function
Ground channel management;
Traffic channel allocation between BTS and MSC.
Radio channel management
Manage TCH channel configuration and signaling in BSS (number of TCH and
Signaling channels);
CCCH and BCCH channel management;
Transfer control.
Operation and maintenance
Error management inside BSC;
Configure and upgrade SW BSC;
Reconfigure BTS;
Change parameters of BTS. 18
20. Overview of BSC3i
Structure and Functions of GSWB
20
GSWB is a non-congested single-layer time-switched frame;
Transfer traffic through BSC from BTS and MSC;
Establish connections to the signaling units and internal data
channels of the BSC.
GSW2KB includes 8 SW256B cards;
SW256B has 128 input and output streams of 4 Mbit/s
21. Overview of BSC3i
The process of establishing a voice connection in GSW2KB
21
SWCOP receives a switching message
from the MCMU's CPU,
Write the switching information (number
of time slots) for the new connection to
the control memory of the SW256B via
the control bus.
Information at each memory location
indicates which input channel is
forwarded to the output required.
A connection is established between the
two channels when the control memory
reads the address from the counter,
then the data in the control memory
reads the address to the switching
memory.
22. Overview of BSC3i
MCMU block structure and function
22
MCMU takes care of GSW2KB control function by
SWCOP . Card;
Aggregate data from OMU and BCSU to manage
radio resources using CPU.
23. Overview of BSC3i
BCSU block structure and function
23
BCSU assumes the signaling function of BSC;
One BCSU in BSC3i manages signaling for up to
200 TRX;
Handling SS7 signaling messages from MSC and
LAPD;
GPRS traffic handling (256 GPRS channels for one
PCU)
24. Overview of BSC3i
OMU structure and function
24
The OMU is an intermediary block between the human and the BSC;
Software management and file system configuration;
Communicate with NetAct to help users monitor errors and manage configuration of
the entire BSC
25. Overview of BSC3i
The structure and function of ETC
25
ETC 0-1
ETC 2-5
GTIC 0-1
Provides an
outbound PCM
connection for
the BSC;
Each ET16 has
16 distinct E1;
BSC3i has a
maximum of 50
ET16 for 800
E1 . Thread;
PCM . stream
HDB3 decode
and encode
26. Overview of BSC3i
LAN Switch
26
SWU
0-5
SWU
6-7
SWU 8-9
There are 2 types of LAN in BSC3i
CPU LAN: 0-1, 6-7 aggregate data from
CPU of MCMU, BCSU and OMU
PCU LAN: 2-3, 4-5, 8-9 serving GPRS
function.
ETH Port 23-
24-25-26 1,
2
Serial port
27. Overview of BSC3i
27
LAN Switch
LANU0: 0 2 4 8 (SWU)
LANU1: 1 3 5 9 (SWU)
SWU 6, 7 for CPU Lan
redundancy using Ethernet
Message Bus.
29. Overview of BSC3i
BSC's BTS Manager
Through BCF ID to manage BTS Site
BCF ID with sequence number from 0 – 2000 for 1 BSC;
Via Abis 2B+D ISDN interface and TRX . Status;
Channel B is 64 kbit/s, channel D is 16 kbit/s;
The status of TRX is Lock and Unlock.
29
31. TCSM3i Overview (cont)
Main function
Code Conversion (64 kbit/s -> 16 kbit/s);
Operational maintenance;
Under the management of BSC through O&M link;
Monitoring errors and warnings sent to BSC;
Self-monitoring of errors and summarizing alarms
sent to BSC's OMU block.
31
34. TCSM3i Overview
CLAB
Get timing signal from
BSC3i .'s CLS;
Aggregates line alarms of
drawers and converts
them to messages sent to
BSC
34
LD1, green LED which is
turned on when the unit is
active
LD2, red alarm LED which can
be controlled by the software
LD3, yellow LED which is
turned on when the forced
control is on
36. TCSM3i Overview
SET Unit (Sonet Exchange Terminal)
Optical interface to MSC;
One SET corresponds to one STM-1 thread (63 E1);
2 SETs are placed in 1 ETS card (ET for 2 STM-1).
36
37. TCSM3i Overview (cont)
TR3E Unit
Implement 64kbit/s -> 16kbit/s code conversion function between A -> Ater
interface and vice versa;
The capacity of 1 TR3E is 120 voice channels
37
38. Remote BTS manager
Main content
About Flexi BTS Manager
Supervision;
Testing;
Commissioning.
Some common BTS errors and how to fix them
38
39. Remote BTS manager
Introducing Flexi BTS Manager
Nokia Flexi BTS Manager is a software for maintenance and
broadcasting of BTS
Local connection via Ethernet port of BTS or remote from
BSC or NetAct;
Allows management of BTS and E1 . Streams;
The main function is:
BTS supervision (alarm, block/unblock)
BTS commissioning
BTS testing
39
40. Remote BTS manager
Introducing Flexi BTS Manager
Supervision
40
Base
Station
Properties
Alarm
view
Menu
Bar
Status
Bar
