Transcript final hitesh nsn

Final Presentation
On Training
at
Nokia Siemens Network
Submitted in the partial fulfillment of the requirements
For the degree of
Bachelors of technology
Guided By:
Mr.D.K Kothari
Associate Professor
4/9/2015
Presented By:
Hitesh Sharma
05BEC107
1
Base Station Subsystem
BSS Includes
Mobile Device
BTS (Base Transceiver Station)
BSC (Base Station Controller)
Transcoder
BTS Construction
BTS with 12 TRX and supporting equipments for its optimum performance.
UltraSite BTS
KEY:
1 Transceiver unit
2 2-way Receiver Multicoupler unit
3 Transceiver Baseband unit
4 Base Operations and Interfaces unit
5 Transmission unit
6 Wideband Combiner unit
7 Dual Variable Gain Duplex Filter unit
8 DC/DC Power Supply unit
9 6-way Receiver Multicoupler unit
10 Remote Tune Combiner unit
11 AC/DC Power Supply unit
12 Bias Tee unit
13 Dual Band Diplex Filter unit
1. Transceiver Unit
The TSxx unit of the Nokia UltraSite EDGE BTS performs RF
modulation/demodulation and amplification for one RF carrier
2.Multicoupler
Multicoupler is a passive unit. The unit divide Received (RX) and DiversityReceived (DRX) signals and distribute them to the Transceiver (TSxx) units.
3. Baseband Card
The BB2x unit is a digital signal processing.
The BB2x also controls frequency hopping.
Uses software downloaded from the Base Operations and Interfaces
4.Base operations and Interface unit
(BOIA)
Configuration
Operations and Maintenance (O&M) functions
Software downloads
Main clock functions
Collection and management of external and internal alarms
5.Transmission Card
It deals with framing and deframing of E1 and cross connections
6.Wideband Combiner
The WCxx unit combines transmit (TX) signals from two
transceiver (TSxx) units and feeds the combined signal
to the TX port of the Dual Variable Gain Duplex Filter
(DVxx) unit.
7.Dual Variable Gain Duplex Filter
•
•
The DVxx performs the following primary functions:
combines transmitted and received signals into one antenna
amplifies received signals with a variable-gain Low Noise Amplifier
(LNA)
Uplink Call Flow
Mobile
Unit
GSM
Antenna
Duplexer
Multicoupler
TRx
BSC
4/9/2015
Microwave
Antenna
Transmission
Unit
BB2F
12
Downlink Call Flow
Microwave
Antenna
BB2F
TRx
Mobile
Station
4/9/2015
GSM
Antenna
Duplexer
Combiner
13
Practical Activities
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In Building Solution.
TRx addition and deletion.
Changing Sinner TRxs by Frisco TRx.
Antenna Down tilting.
Traffic allocation using BTS manager software.
Alarm monitoring using Reflection Router.
MapInfo Software.
Net Monitor.
Drive Test.
In Building Solution
• It is a process, where in we radiate adequate
Mobile signals of one particular Network
operator in that entire building.
 Offices/industries.
 Airports and bus/train stations.
 Conference and exhibition centers.
 Hospitals.
 Hotels.
 Shopping malls.
The repeater system is a two-way amplifier that provides booster performance to
extend the coverage of radio communications in buildings, basements and other
RF shadow areas.
The Repeater receives signals from one antenna, amplifies them and transmits
through the other antenna.
Power Calculation
+43dbm :ultra site power
-5dbm :cable loss
-1dbm :connector loss
+18dbm:GSM antenna gain
****************
+55dbm:EIRP {Equivalent isotropically radiated power }
****************
-115dbm: Path loss
-8dbm:Multipath Fading loss
+12dbm:Gain of Yagi Antenna
-5dbm:Rf cable loss
-1dbm:Connector loss
+90dbm:Repeater Gain
-1dbm: Repeater Connector loss
-5dbm:Repeater cable loss
+6dbm :Panel Gain
-80dbm:Free space loss
****************************************
-52dbm: Repeater o/p power in room
****************************************
TRx addition and deletion
• One TRx supports 8 users at a time to operate
• And a BTS supports maximum 12 TRxs.
• If number of users are less than we don’t utilize
the full capacity of the BTS.
• But if number of users increase then we have to
make changes in the configuration.
• And we have to add TRxs.
• For that first of all we have to make addition
logically from the NMS server.
• Then we have to allocate the traffic to that TRx.
• After that we have to go to that site and then
physically add a new TRx and its physical
connections to be made.
• After that we have locally login in that site and
then unlock that TRx.
• Now if its LED is orange that shows its working.
• If LED is green then that shows calls are going
on that TRx.
• And if the LED is red that it shows the faulty
condition of TRx.
• We have to delete it and add a new TRx.
• Now in Deletion first we have to lock that TRx
before removing it physically.
• By locking that TRx the calls going on that TRx
will be transferred to another TRx and no any
new calls will arrive on that TRx.
• Now it is to be physically removed and new TRx
to be added.
Sinner to Frisco
• These are TRx types defined by its power
level.
• In Frisco TRx if call is not going on that TRx
then it will make power level of that TRx less.
• In Sinner TRx it will maintain its power level
though the call is not going on.
• So Frisco TRx are to be used to save the
power consumption in idle condition.
• But the TRx which contains the BCCH should
be Sinner because if the power Level of
BCCH goes down then it create coverage
problems.
• In a sector of a Site there are four TRx as
there are three sectors at a site of 12
TRxs.
• On one TRx out of that four will have the
BCCH.
• So we have to put a Sinner TRx which
contain BCCH and all the three TRx which
carry only traffic should be Frisco.
Nokia BTS manger software
• This software helps us to access a
particular site whose site ID is known.
• It shows current internal structure of a
specific site.
• BTS manager is a tool which is used for
remote login.
• It shows the hardware status and
configuration.
TRAFFIC MANAGER
• The traffic manager gives us the
information about the traffic condition of a
particular BTS.
• This E1 is having 2.048 Mbps total space.
• There are 32 slots or channels in each
E1s.
• Each is further divided into 4 time slots.
• Each time slot is of 16kbps.
•
Channel 0: It always dedicated to BCH signalling.
•
Channel 1 to 21: These channels are assigned to
TCH . On TCH the voice call take place. 2 channels
are given to one TRX.
•
Channel 27 to 31(except 2nd slot of channel 31):
These all slots are assigned to TRX signaling. The
signaling if TRX is necessary for synchronization.
•
Channel 31 and time-slot 2: This time a lot is always
assigned to OMU signaling. OMU(Operation
Maintenance Unit) is the heart of a BTS. OMU is the
intelligent pare of a BTS. The instruction regarding to
any BTS is given to that BTS through OMU signaling. If
the OMU signaling is not proper then the site will not
work properly.
•
Channel 22 to 26: The remaining time slots are
assigned to EDAP. EDAP is for the data transmission
for GPRS usage of MS (Mobile station). Data packets
are handled by these time-slots.
Map Info
It is a software which is used to determine
various parameter of a network.
It is also used in frequency planning.
It is also used to determine physical
location of each cell and frequency used in
each cell.
It is also used to show orientation of each
sector.
Any position can be mapped into this.
Net Monitor
• Net monitor is a software tool which is
present in mobile itself.
• Net monitor is used to find certain
parameters related to received signal and
cell.
Drive Test
• For drive testing, a test mobile is used.
This test mobile keeps on making calls in
a moving vehicle that goes around in the
various parts of the network. Based on the
parameters, the quality of the network can
then be analyzed.
Benchmarking
• In benchmarking, the performance of
different operators is compared.
• The relevant software will store all the data
related to the drive test such as the path
followed, the number of dropped calls, the
average signal strength, average quality
etc for all the MSs of different operators
NEIGHBORING CHANNEL SIGNAL LEVELS
SNAP SHOT OF VOICE QUALITY
Thank You!!