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5/28/2018 Atoll 3.1.2 Gsm Gprs Edge Advanced
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GSM/GPRS/EDGE Advanced FeaturesAtoll 3.1.2
Forsk 2012 Confidentia lDo not share without prior permission Slide 1
5/28/2018 Atoll 3.1.2 Gsm Gprs Edge Advanced
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1. Advanced Modelling of Multi-Band Transmitters
2. Traffic Modelling
3. Network Dimensioning
4. KPIs Estimation
Forsk 2012 Slide 2ConfidentialDo not s hare without prior permission
Training Programme
5/28/2018 Atoll 3.1.2 Gsm Gprs Edge Advanced
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Advanced Modelling of Multi-Band TXs
Default Modelling of Dual Band TX
Activation of the Advanced Modelling of Multi-Band TX Feature
Atoll Specific Interface
Forsk 2012 Confidentia lDo not share without prior permission Slide 3
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Default Modelling of Dual-Bands TX
Possibility to Define Cell Types Having Several Frequency Bands
GSM900/1800 Concentric Cells
Common Antenna and
Propagation (model,
resolution and radius)
Settings for all the Subcells
of the transmitter
BCCH Frequency Band for
all the Subcells of the
transmitter used by the
propagation model
Definition of Domains located in
different Frequency Bands.
Possibility to model thePropagation Offset by a constant
power offset in the Subcells
Allocation of Channels
belonging to the related
Frequency Domains
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Activation of the Advanced Modelling of Multi-Band TX
Feature
Introduction of an ATOLL.INI File in the Atoll Installation Directory
To turn on the Multi-Band modelling feature, add the following lines in the Atoll.ini file:
[Studies]
MultiBandManagement = 1
Evolution in Atoll Interface
New Button in the TRX tab of the Transmitter Property Dialogue
New Table in the Subcell part of the Transmitter folder context menu
Forsk 2012 Confidentia lDo not share without prior permission Slide 5
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Atoll Specific Interface
TRX Tab of the Transmitter Property Dialogue
All the Subcells having a Frequency
Domain included in the Frequency Band
of the BCCH have the default transmitter
settings (Antenna and Propagation
model settings)
The Subcells having a Frequency Domain
not part of the BCCH Frequency band
can have specific Propagation settings(Antenna and Propagation model)
Forsk 2012 Confidentia lDo not share without prior permission Slide 6
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Atoll Specific Interface
TRX Tab of the Transmitter Property Dialogue
Specific Antenna and Equipment Settings
for the frequency band 1800 MHz
(compared to the default 900 MHz in the
current transmitter)
Specific Propagation Model Settings for
the frequency band 1800 MHz Forsk 2012 Confidentia lDo not share without prior permission Slide 7
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Atoll Specific Interface
New Table in the Subcell Entry
Default 900 MHz settings defined in the
Transmitter and Propagation Tab of the
Transmitter Property Dialogue
Specific 1800 MHz settings (Antenna,
Equipment and Propagation Settings) Forsk 2012 Confidentia lDo not share without prior permission Slide 8
5/28/2018 Atoll 3.1.2 Gsm Gprs Edge Advanced
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1. Advanced Modelling of Multi-Band Transmitters
2. Traffic Modelling
3. Network Dimensioning
4. KPIs Estimation
Forsk 2012 Slide 9ConfidentialDo not s hare without prior permission
Training Programme
5/28/2018 Atoll 3.1.2 Gsm Gprs Edge Advanced
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GSM/GPRS/EDGE Traffic Modelling
Overview
Multi-Service Traffic Data
Traffic Map Management
Traffic Analysis
Forsk 2012 Confidentia lDo not share without prior permission Slide 10
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Overview
Modelling the Multi-Service Traffic Data
Creation of Different Kinds of Traffic Maps
Based on marketing data or live traffic
Traffic Analysis
Traffic distribution between transmitters and HCS layers that will be used as input of the dimensioning
Forsk 2012 Confidentia lDo not share without prior permission Slide 11
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Multi-Service Traffic Data (1)
Management from the GSM/GPRS/EDGE Folder of the Data Tab
Description of Services, Terminals, Mobility types
Description of User Profiles and Environments
Information used in some traffic maps
Forsk 2012 Confidentia lDo not share without prior permission Slide 12
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Multi-Service Traffic Data (2)
Service Properties
Indication of the type of service
Circuit or packet switched service
Different parameters according to the type of service
For Circuit-Switched Services
Maximum permissible
blocking rate stated in
Erlang B or C
Forsk 2012 Confidentia lDo not share without prior permission Slide 13
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Multi-Service Traffic Data (3)
Service Properties
For Packet-Switched Services
Probability to have delayed packet arrivals and
maximum permissible delay
Minimum and maximum numbers of timeslots
allowed to be multiplexed per user for that
particular service
Minimum required throughput with a
percentage of coverage that should at least be
provided with this throughput
Parameters related to the Application
Throughput compared to the gross
throughput (from Coding schemes).
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Multi-Service Traffic Data (4)
Mobility Type Properties
Used to distribute traffic
between HCS layers
Forsk 2012 Confidentia lDo not share without prior permission Slide 15
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Multi-Service Traffic Data (5)
Terminal Properties
GSM Terminal
Frequency bands and
technology compatible
with the terminal.
Information used todistribute traffic between
subcells.
Codec Equipment Selection(Circuit Only)
Receiver Noise figure used in
the Interference estimations
(predictions, traffic capture)
Forsk 2012 Confidentia lDo not share without prior permission Slide 16
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Multi-Service Traffic Data (6)
Terminal Properties
GSM/GPRS/EDGE Terminal
Frequency bands and
technology compatible
with the terminal.
Information used todistribute traffic between
Subcells.
Number of timeslots
the terminal can
multiplex in DL.
Codec Equipment Selection
(Circuit Only)
GPRS/EDGE Equipment
Selection (Packet Only)
Max number of coding
schemes allowed in GPRS (CS)
and EDGE (MCS)
Receiver Noise figure used in
the Interference estimations
(predictions, traffic capture) Forsk 2012 Confidentia lDo not share without prior permission Slide 17
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Traffic Map Management
Detailed information about Traffic Map Management is available in
Atoll_3.1.2_Traffic_Maps_Management.pdf
Forsk 2012 Confidentia lDo not share without prior permission Slide 18
http://localhost/var/www/apps/conversion/tmp/scratch_10/Atoll_3.1.2_Traffic_Maps_Management.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Atoll_3.1.2_Traffic_Maps_Management.pdf5/28/2018 Atoll 3.1.2 Gsm Gprs Edge Advanced
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Traffic Analysis (1)
Purposes
To analyse the traffic from maps at the transmitter level
To use traffic analysis as basis of the dimensioning
Traffic analysis is a mandatory step before dimensioning
Means
Atoll distributes traffic from maps to each transmitter of each HCS layer according compatibility criteria
defined for :
Transmitters : Frequency bands, GPRS/EDGE configuration of GPRS/EDGE station (and Max CS/MCS)
HCS layers : Maximum speed allowed
Services : Type of service
Terminals : Technology and frequency bands supported, GPRS/EDGE equipment (and Max CS/MCS)
Mobility types : Speed
E.g.. A user with a GSM900 band mobile phone will not be allocated to a transmitter that only functions on
the DCS1800 band
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Traffic Analysis (2)
Creation of a Traffic Capture (1/2)
Command New from the Traffic analysis folder context menu
Property dialog
General tab : possibility to add some comments and to filter transmitters
Source traffic tab
Traffic
Selection of maps to be used
Optional multiplicative factor used
to increase the traffic request of the
map
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Traffic Analysis (3)
Creation of a Traffic Capture (2/2)
Property dialog
Condition tabOptions used to determine
each transmitter service area
which Atoll will distribute
traffic to
Possibility to base the packet traffic
demand in timeslots taking into
account :
- the current level of interferences I
- the receiver thermal noise N.
(Use of GPRS/EDGE equipment graphs)
Run calculations Forsk 2012 Confidentia lDo not share without prior permission Slide 21
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Traffic Analysis (4)
Outputs of a Traffic Capture
Two tabs in the Traffic capture property dialog
Results per transmitter tab : traffic distributed to each transmitter
Circuit traffic
demand (Erlangs and
circuit timeslots) on
each Tx service area
Packet traffic demand
(kbps and packet
timeslots) on each Tx
service area
Average
throughput carried
by a packet
timeslot on each Tx
service area
Forsk 2012 Confidentia lDo not share without prior permission Slide 22
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Traffic Analysis (5)
Outputs of a Traffic Capture
Two tabs in the Traffic capture property dialog
Results per subcell tab : details of the distributed traffic per subcell, service, terminal and mobility
Number of timeslots to be
used to match the traffic
demand
Type of traffic
Circuit and packet traffic
demand
Forsk 2012 Confidentia lDo not share without prior permission Slide 23
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Traffic Analysis (6)
Applications of Traffic Analysis
A traffic capture may be used as the default traffic distribution
Taken into account in coverage study reports and neighbour allocation
Calculations of dimensioning and Key Performance Indicators are performed from a traffic capture
Forsk 2012 Confidentia lDo not share without prior permission Slide 24
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1. Advanced Modelling of Multi-Band Transmitters
2. Traffic Modelling
3. Network Dimensioning
4. KPIs Estimation
Forsk 2012 Slide 25ConfidentialDo not s hare without prior permission
Training Programme
5/28/2018 Atoll 3.1.2 Gsm Gprs Edge Advanced
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Network Dimensioning
Overview
Dimensioning Model Management
Timeslot Configurations
Dimensioning Results
Forsk 2012 Confidentia lDo not share without prior permission Slide 26
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Overview
Dimensioning Algorithm
Based on a traffic capture
Using a dimensioning model
Dimensioning Model
Basis of the dimensioning and quality analysis process
Available in the GSM/EDGE parameters folder
Forsk 2012 Confidentia lDo not share without prior permission Slide 27
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Dimensioning Model Management (1)
Dimensioning Model Properties (1/2)
General tab
Dimensioning options for circuit services
Queuing model (Erlang B or C)
Dimensioning options for packet services
Minimum number of dedicated packet timeslots
that can be used by the Tx
Maximum number of TRXs that can be added in
order for the subcell to fulfil the packet traffic
demand
Key Performance Indicators to be fulfilled
Variations of throughput, blocking rate and delay
with the load.
Used for the packet traffic dimensioning when
corresponding KPIs are taken into account.
Global value used when no specific value isdefined per transmitter
Forsk 2012 Confidentia lDo not share without prior permission Slide 28
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Dimensioning Model Management (2)
Dimensioning Model Properties (2/2)
Quality charts tab
Quality charts used for the dimensioning
process of packet traffic
Throughput reduction factor = f(load)Delay = f(load)
Blocking probability = f(load)
Ratio of the number
of packet timeslots
available to the
number of timeslots
per packet connection
Forsk 2012 Confidentia lDo not share without prior permission Slide 29
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Timeslot Configurations
Distribution of circuit, shared and packet timeslots on each TRX of a subcell
A timeslot configuration is assigned to each subcell
Influences the dimensioning result
Forsk 2012 Confidentia lDo not share without prior permission Slide 30
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Dimensioning Results (1)
Dimensioning Calculation
Command Dimensioning from the context menu of a traffic analysis
1. Select the dimensioning
model to be used
3. Start dimensioning
calculation
2. Selection of columns to be
displayed in the result table
4. Check the dimensioning
results
5. Commit dimensioning
results to subcells
Forsk 2012 Confidentia lDo not share without prior permission Slide 31
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Dimensioning Results (2)
Dimensioning Results for each Subcell (1/2)
Main dimensioning results
Number of required TRXs
Number of required packet, shared and circuit timeslots
Traffic load
Average occupancy of TRXs
Network settings
Maximum number of TRXs
Maximum rate of traffic overflow
Half rate traffic ratio
Traffic capture results
Packet and circuit traffic demand
Average demand in packet and circuit timeslots
Average number of packet and circuit timeslots per connection
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Dimensioning Results (3)
Dimensioning Results for each Subcell (2/2)
Additional dimensioning results
For circuit services
Served circuit traffic, effective rate of traffic overflow and effective blocking rate
For packet services
Served packet traffic, effective rate of traffic overflow, minimum throughput reduction factor and KPIs
(throughput reduction factor, delay, blocking rate)
Transmitters are displayed in red when the required number of TRXs exceeds the maximum number of
TRXs per transmitter
Some Dimensioning Results May Be Committed to Subcells
Forsk 2012 Confidentia lDo not share without prior permission Slide 33
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1. Advanced Modelling of Multi-Band Transmitters
2. Traffic Modelling
3. Network Dimensioning
4. KPIs Estimation
Forsk 2012 Slide 34ConfidentialDo not s hare without prior permission
Training Programme
5/28/2018 Atoll 3.1.2 Gsm Gprs Edge Advanced
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KPIs Calculation
Overview
Running KPIs
KPIs Results
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Overview
Tool to Analyse KPIs of a Planned Network
Based on a traffic capture
Using a dimensioning model
KPIs
For circuit traffic : effective blocking rate stated in Erlang B or Erlang C
For packet traffic : effective throughput reduction factor, delay and blocking rate
Requirements
An existing frequency plan
A calculated traffic capture
A dimensioning model
Forsk 2012 Confidentia lDo not share without prior permission Slide 36
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Running KPIs
KPI Calculation
Command KPI calculation from the context menu of a traffic analysis
Same dialog as the one used for dimensioning
1. Select the dimensioning
model to be used. Atoll will use
the quality charts of the
dimensioning model in order to
calculate KPIs in case of packet
traffic.
3. Start KPI calculation
2. Selection of columns to be
displayed in the result table
4. Check the KPIs and
other results
5. Commit results to subcells
Forsk 2012 Confidentia lDo not share without prior permission Slide 37
l ( )
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KPIs Results (1)
Results for each Subcell (1/2)
Network settings
Number of TRXs
Number of packet, shared and circuit timeslots
Maximum number of TRXs
Maximum rate of traffic overflow
Half rate traffic ratio
Traffic capture results
Packet and circuit traffic demand
Average demand in packet and circuit timeslots
Average number of packet and circuit timeslots per connection
Forsk 2012 Confidentia lDo not share without prior permission Slide 38
KPI R l (2)
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KPIs Results (2)
Results for each Subcell (1/2)
Results of the network analysis
Traffic load
For circuit services
Served circuit traffic, effective rate of traffic overflow and effective blocking rate
For packet services
Served packet traffic, effective rate of traffic overflow, minimum throughput reduction factor and KPIs
(throughput reduction factor, delay, blocking rate)
Some Results May Be Commited in the Subcells Table
Traffic load
Effective blocking rate
Forsk 2012 Confidentia lDo not share without prior permission Slide 39
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Thank you
Forsk 2012 Confidentia lDo not share without prior permission Slide 40
Slid Titl
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Slide Title
Forsk 2012 Slide 41ConfidentialDo not s hare without prior permission
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Thank you