Atoll Getting Started UMTS 310 en V1
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Atoll Getting Started-UMTS Version 3.1.0 Forsk China May 2011
Version 3.1 GSM/GPRS/EDGE UMTS/HSPA LTE CDMA2000 1xRTT/EV-DO TD-SCDMA WiMAX/BWA Microwave Links
Atoll Getting Started UMTS Version 3.1.0
Table of Contents 1
Introduction .............................................................................................................. 4
2
Installation ................................................................................................................ 5
3
Sequence of operations .......................................................................................... 9 3.1 3.2
3.3 3.4
3.5
3.6
New project ................................................................................................ 12 Import of 3D maps ..................................................................................... 14 3.2.1 Import of heights map ......................................................................... 15 3.2.2 Import of clutter map........................................................................... 16 3.2.3 Import of vector map........................................................................... 20 Setting a coordinate system ...................................................................... 25 Network data setting .................................................................................. 30 3.4.1 Import of the Sites table ...................................................................... 31 3.4.2 Antenna parameters setting................................................................ 37 3.4.3 Transmitters parameters setting ......................................................... 42 3.4.3.1 Transmitters table ........................................................................ 42 3.4.3.2 Global Parameters ...................................................................... 46 3.4.4 Cells parameters setting ..................................................................... 49 3.4.5 Import and export ............................................................................... 53 3.4.5.1 Import Access database .............................................................. 53 3.4.5.2 Export to Access database .......................................................... 55 3.4.6 Add new sites ..................................................................................... 56 3.4.6.1 Add new sites one by one ........................................................... 56 3.4.6.2 Add a group of sites .................................................................... 57 3.4.6.3 Template management ................................................................ 59 Propagation model..................................................................................... 61 3.5.1 SPM propagation model ..................................................................... 61 3.5.1.1 Import of CW measurement ........................................................ 61 3.5.1.2 Automatic calibration of the SPM model ..................................... 68 3.5.1.3 Model validation with CW measurements ................................... 72 3.5.1.4 Set the propagation model for each transmitter .......................... 77 3.5.2 Cost-Hata model ................................................................................. 79 3.5.2.1 Import of CW measurements ...................................................... 79 3.5.2.2 Automatic calibration of the Cost-Hata model ............................. 79 3.5.2.3 Cost-Hata model properties ........................................................ 82 Propagation matrix calculation ................................................................... 85 3.6.1 Preliminary work ................................................................................. 85 3.6.1.1 Resolution of predictions and receiver altitude ............................ 85 3.6.1.2 Setting the Computation Zone ..................................................... 86 3.6.2 Propagation and prediction studies calculation................................... 92 3.6.2.1 Best server prediction ................................................................. 93 3.6.2.2 Coverage by Signal Level prediction ........................................... 96
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3.6.2.3 Overlapping Zones prediction ..................................................... 99 3.6.2.4 Force calculation ....................................................................... 101 3.6.2.5 Prediction template management .............................................. 101 3.7 Simulation ................................................................................................ 103 3.7.1 Traffic model ..................................................................................... 103 3.7.1.1 Services .................................................................................... 103 3.7.1.2 Mobility Types ........................................................................... 105 3.7.1.3 Terminals ................................................................................... 106 3.7.1.4 User Profiles.............................................................................. 108 3.7.1.5 Environments ............................................................................ 108 3.7.2 Creating Traffic Maps.........................................................................110 3.7.2.1 User profile Traffic map .............................................................. 111 3.7.2.2 User profile traffic map - User profile densities ...........................116 3.7.2.3 Sector traffic map -Throughputs in uplink and downlink .............118 3.7.2.4 Sector traffic map - Total number of users (All activity statuses) 124 3.7.2.5 Sector traffic map - number of users per activity status............. 124 3.7.2.6 User density traffic map (no. of users/km2) ............................... 124 3.7.3 Simulation ......................................................................................... 131 3.8 Point analysis tool .................................................................................... 135 3.8.1 Profile ............................................................................................... 136 3.8.2 Reception ......................................................................................... 137 3.8.3 AS Analysis....................................................................................... 137 3.8.4 SC Collisions .................................................................................... 139 3.8.5 Details............................................................................................... 139 3.9 Other prediction studies ........................................................................... 140 3.9.1 Prediction parameters setting ........................................................... 140 3.9.2 Standard prediction studies .............................................................. 143 3.9.3 HSDPA ............................................................................................. 145 3.9.4 HSUPA ............................................................................................. 155 3.9.5 Dual-Cell HSDPA Modeling .............................................................. 161 3.10 Neighbours Allocation .............................................................................. 165 3.10.1 Automatic allocation ......................................................................... 165 3.11 Scrambling Codes Allocation ................................................................... 169 3.12 Other features .......................................................................................... 175 3.12.1 User configuration function ............................................................... 175 3.12.2 Store methods for path loss matrices ............................................... 178 4
Tips and tricks ...................................................................................................... 179
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1 Introduction This document explains the entire process from the import of network data in Atoll to the production of prediction studies. The purpose of this document is to give an overall understanding for radio engineers, who never use Atoll. This document does not explain the algorithm and don’t give detailed explanation. The user may find in the “Technical Reference Guide” and “User Manual” the concrete algorithm and the detailed explanation of parameters. The user may find all projects and map data in the CDROM, which was provided with this document. This document describes how to get started using the Atoll version 3.1.0.
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2 Installation The installation of Atoll is simple and needs an administrator profile. 1) The naming structure of the Atoll installation file is generally: “Atoll.language.version_number.build_number.exe”, as shown bellow:
2)
Before starting the installation of Atoll, the dongle has to be plugged out.
3)
Install Atoll by double clicking on the installation file.
4)
In the appeared dialog box, click on the “Next” button and choose the installation directory (the default path is C:\Program File\Forsk\Atoll). The minimum requirement for the installation of Atoll is a disk space of 111.9 MB.
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5)
In the 3rd window the user may choose “Full installation”, “Compact installation” or “Custom installation” and select the modules. The recommendation for a first installation of Atoll is “Full installation”, including Atoll, Add-ins (Export to Google Earth and Best Signal Export), Driver for Fixed License Keys, Distributed Calculation Server and Atoll Management Console. Later update of Atoll, models can be chosen to install. Please note, if Atoll has been uninstalled once, Driver for Fixed License Keys model should be installed again.
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6)
In the 4th window, fill in the “Domain”, “Username” and “Password” fields. If the user doesn’t choose previously “Distributed Calculation Server”, then he doesn’t need to fill in any information.
7)
Click on the “Next” button to start the installation of Atoll. After the installation, the computer needs to be restarted.
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8) Plug in the dongle. Atoll users need to pay attention for the following 3 points: (1) It is recommended to plug in/out dongle when computer is shutting down. (2) If it is not necessary, don’t change the computer date when using Atoll. (3) If it still can not find the USB dongle driver after installed Atoll, please find and install the Sentinel Driver on Atoll installation path or download it as below: http://www.safenet-inc.com/support/tech/sentinel.asp#
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3 Sequence of operations This following document presents how to establish an Atoll UMTS project and to carry out coverage predictions, simulations and production of reports: (1) Start a new project (2) Import of 3D maps (3) Setting the coordinate system (4) Import of network data (5) Propagation model selection and calibration (6) “Best Server” and “Signal Level” coverage predictions (7) Traffic Modeling (8) Monte-Carlo simulation (9) Calculation of other prediction studies (10) Production of reports
The operation flow chart is represented in the following figure (dashed line frames may be chosen or not).
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Start
Essential data collection
Propagation model selection
Import of 3D maps
Choice of coordinate system
Import of antenna patterns
Setting of BTS Equipments and Channel Elements
Adjustment of special parameters
SPM model selected?
N
Y
CW drive test
Site table Transmitter equipments (TMA, feeder, BTS)
Transmitter table Model calibration Cells table
Setting of the prediction properties
Drawing of the computation zone
Best server coverage prediction
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Traffic model adjustment Traffic modeling Environment User profiles Terminals
WCDMA parameters setting
Traffic map setting
Mobility Services
Monte-Carlo simulation
Does the traffic model satisfy?
N
Y Commit of the simulation results
Calculation of other predictions
Neighbour allocation
Scrambling code allocation
Calculation
N
Do the calculation results satisfy? Y
Export the calculation results
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3.1 New project After opening Atoll, click on
or select File->Open.
The project templates dialog box will appear. Choose “UMTS HSPA” template.
Atoll opens a blank UMTS project. The new project already includes the default antenna database.
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Explorer Window
Map Window
The Atoll main window contains an Explorer Window and a Map Window, as seen in the figure above.
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3.2 Import of 3D maps In the main tool bar, select “File->Import”.
In the appeared “Open” dialog box browse the geographical map folder.
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Generally the following data maps need to be imported in Atoll: heights (map of the altitude above sea level), clutter classes (type of land used) and vector (vector maps). The order of import is not important, but, for this document, the following order will be used: heights->clutter->vectors.
3.2.1 Import of heights map 1)
In the “Open” dialog box, select the “Geo_Data\Brussels\Heights” folder in the CDROM. Select the “index” document and click on “Open”
2)
In the appeared “Data Type” dialog box, click on the “Altitudes” button and click “OK”.
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3)
After the map import, the following figure appears. The “heights” map is automatically put on the left side in the explorer window under the “Geo” tab named “Digital Terrain Model”
3.2.2 Import of clutter map 1)
Select again “File->Import” in the main toolbar. In the “Open” dialog box, select the “Geo_Data\Brussels\Clutterr” folder. Select the “index” document and click on “Open”
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2)
In the appeared “Data Type” dialog box, click on the “Clutter Classes” button and click on “OK”
3)
After the map is imported, the following figure appears. The clutter classes map is automatically put on the left side in the explorer window under the “Geo” tab named “Clutter Classes”
4)
Double clicking on the “Clutter Classes” folder, open the “Clutter Classes properties” dialog box for the setting of clutter parameters. Select the “Description” tab and click on the bottom right “Refresh” button. Atoll will filter the clutter classes, which are not included into the clutter map. The following figure shows the filtered tab of clutter
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classes. The following parameters can be defined in the dialog box: Model Standard Deviation, EC/Io Standard Deviation, DL and UL Eb/Nt Standard Deviation, Indoor Loss, Orthogonality Factor, Indoor Loss, % Pilot Finger, Spatial Multiplexing Gain Factor and Additional Transmit Diversity Gain.
Note: An additional indoor loss can now be defined per frequency band. 5)
These values have to be set according to the customer network, if “Use only default values” is chosen, Atoll will use default values for each clutter standard deviation.
6)
In the “Display” tab, adjust the display color of each clutter type. Pay attention to the “Display type” and the “Field”. The following figure is the suggested setting of
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“Display tab”. Click on the color frame to change the color for each clutter type.
Select “Add to legend” to display information in the legend window. Use the “Transparency” function to adjust the transparency of the map. The display of each clutter may be disabling by unchecking the check-box. 7)
After setting the “Clutter Classes properties”, the clutter map will be displayed as below:
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3.2.3 Import of vector map 1)
Select again “File->Import” in the main toolbar. In the “Open” dialog box, select the “Geo_Data\Brussels\Vector” folder. Select the “index” document and click on “Open”.
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2)
In the appeared “Data Type” dialog box, click on the “Vectors” button and click “OK”
3)
In the appeared “Vector import” dialog box, use the default settings and click on the “Import” button to import the map.
4)
After the map import, the following figure appears. The vector map is automatically put on the left side in the explorer window under the “Geo” tab named “Vectors”.
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5)
Dragging the “Vectors” folder with the mouse to the top of the explorer window, the “Vector” map will be placed as the uppermost layer, as seen in the following figure.
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6)
Double clicking on “Airport” in the “Vectors” folder, open the “airport properties” dialog box, and select the “Display” tab, as seen in the following figure.
7)
Clicking on the vector line to open the “Display” dialog box to set the color and style of the vector line.
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8)
As shown in the following figure, the color of the vector line is changed.
9)
You may modify other vector files with the same operations as for the “airport” vector file. The following figure shows all the imported digital maps.
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3.3 Setting a coordinate system Select “Document->Properties”, as shown in the following figure.
In the appeared “Properties” dialog box, the “Projection” and “Display” can be defined in the “Coordinate systems” frame.
1)
First set the projection system (it can be known by reading the file “projection.txt” in the “heights” folder). For the demo project the projection system is “WGS 84 UTM zone 31N”. Click on the right side of the “Projection” field on
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dialog box and choose WGS84 UTM zones in the “Find in” box.
2)
Then choose WGS 84/UTM zone 31N and click “OK”.
3)
After the setting of parameters, the following dialog box is displayed.
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4) Setting the “Display System”. The “Display system” function allows the user to choose the relative coordinates (X and Y, unit in meter) or the longitude and latitude for the Map Window. After having set the “Projection” system, Atoll automatically sets the “Display” system with the same system as the “Projection” system, as shown in the figure above. The windows map uses relative coordinate. The display has to be set for displaying the longitude and latitude. Click on the right side of the “Display” field on the
button and open the “Coordinate
Systems” dialog box. Select “WGS84 UTM zones” and choose the “WGS 84” system (with an ellipsoidal symbol).
5)
After the setting of parameters, the following dialog box is displayed.
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6)
After having set the “Coordinate” system, the Map Window displays the longitude and latitude, default value is xx°xx′xx.xx″S (degreed, minute and second, ”S” means southern hemisphere), as shown in the following figure.
7)
The user can choose the “Degree Format” among the “xx°xx'xx.xx”, “xxdxxmxx.xxsS” format (“d” is degree, “m” is minute and “s” is second, ”S” means southern hemisphere), the “xx.xxxxx” format (decimal base) or the “-xx.xxxxx” format (decimal base and southern hemisphere expressed with the minus sign), as shown in the following figure.
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Note: If the user wants to use another projection system and wants to display the longitude and latitude coordinates, then the display system has to be chosen according to the projection system name. Moreover there is an ellipsoid symbol in front of the display system.
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3.4 Network data setting The setting of a WCDMA project in Atoll can be done for two different cases: (1) The network is already deployed or the network data, including site location, antenna patterns and so on, already exist. (2) The network is not deployed and the user starts the network planning with site placement in the planning tool. The following part introduces the first case. All data have to be prepared in Excel, before importing them. Atoll needs an Excel document with network data including sites, antennas, transmitters and cells. All necessary data for the setup of the Brussels project are in the “UMTS_Brussels_Network.xls” document in the “Reference_Data\Network_Data” folder. The “UMTS_Brussels_Network.xls” document has 5 worksheets. The network data are contained in the first 4 worksheets and the others will be introduced later. The import of the network data must be done by a certain order. In Atoll, the order follows the explorer window order. The following figure shows the order for the introduction of the network data: Sites->Antennas->Transmitters->Cells.
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3.4.1 Import of the Sites table 1)
Open the “UMTS_Brussels_Network.xls” document and select the “UMTS network Sites” sheet. We have provided two sets of coordinate data. On the left side there are the relative coordinates and on the right side there are coordinates with longitude and latitude. If the WGS 84 display system has been previously chosen (display mode with longitude and latitude), the coordinate located on the right side of the sheet must be selected. Note: If the display system is set with longitude and latitude, then the longitude and latitude data should be transform in decimal base value.
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2)
Copy the columns “Name”, “Longitude” and “Latitude” (except the title line).
3)
In the “Network” window, double click on the “Sites” folder (or right click on the “Sites” folder and select “Open Table”) will open the “Sites” table, as shown in the following figure.
4)
In the “Sites” table, select the first cell and paste the data. Except for the columns “Name”, “X” and “Y”, the others are automatically filled in with default value. Atoll will
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transform automatically the longitude and latitude form decimal format to minutes and seconds system. The imported sites will be put in the “Sites” folder of the “Network” window with an alphabetic order, as shown in the following figure.
5) Ö Ö
If the user wants to delete one or several sites, he can delete them in the “Sites” table or directly in the “Network” window. In the “Sites” table, click on the left grey cell of the line, which contains the site you want to delete, select the entire line, and push the keyboard “delete” button. In the “Network” window, right click on the site you want to delete and select “delete” in the menu, as shown in the following figure.
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6)
After the input of “Sites” data, the Map Window is automatically updated with the new sites. In the following figure, a black circle represents a site.
7)
Open the “Sites” properties dialog box (right click on the “Sites” folder and select “properties”) to change the display attributes, as shown in the following figure.
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Choosing “Unique” allows only a unique color for the display of sites. Choosing “Discrete values” or “Value intervals” allows colors selection according to certain characteristics. By default, a site is represented by a black circle. If necessary, the symbol and color of sites can be changed, by selecting “Properties” in the “Actions” dialog box. The appeared “Display” window allows the selection of color and symbol.
8)
Site Equipment Setting. Open the Site Equipment Table on Network Settings -> Radio Resource Management on Parameters Window to define site equipment.
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3.4.2 Antenna parameters setting Atoll needs the following antenna’s data: antenna name, antenna gain, antenna horizontal and vertical patterns. Beamwidth, Fmin and Fmax are reference parameters and they are not used for calculation. Atoll calculates and displays the electrical down tilt from the vertical pattern. The calculated electrical down tilt is only given for information. 1) Select the “UMTS network - Antennas” sheet in the “UMTS_Brussels_Network.xls” document. As seen in the following figure, the horizontal and vertical patterns are provided.
2)
A few physical antenna groups can be found on Radio Network Equipment – Antennas folder on Parameters window. One physical antenna group with the same beamwidth, gain and Frequency but different Electrical Downtilt.
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Right click on the “Antennas” folder in the Explorer Window and select “New” in the context menu, as shown in the following figure.
3)
In the “Antennas New element properties” dialog box, the following tabs are available: “General”, “Horizontal pattern”，”Vertical pattern” and “Other properties”.
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4)
In the “General” tab, the antenna gain and the electrical tilt can be defined.
Note: The electrical tilt value is only a reference information for the user and this parameter has no impact on the calculation. Antenna gain unit may be dBi or dBd. The unit can be selected in the “Document—Properties—Units” dialog box.
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5)
Copy the two columns corresponding to the horizontal pattern of the “UMTS_Brussels_Network.xls” document, and paste it in the “Co-Polar section” of the “Horizontal pattern” tab in Atoll.
6)
Do the same operation for the vertical pattern.
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Note: Atoll allows you to enter antenna pattern attenuations for as many as 720 angles. Therefore, attenuation values can also be defined for angles other than integer values from 0° to 359°. For example: 0, 0.5, 1, 1.5, 2, 2.5 … 359, 359.5. 7)
Other parameters can be set in the “Other properties” tab, but it is only reference information and it has no impact on the calculation.
8)
A new antenna named “UMTS Antenna Test” can be found on “Physical Antenna:60deg 17dBi 2100MHz” on Antennas folder.
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3.4.3 Transmitters parameters setting 3.4.3.1 Transmitters table 1)
Open the “UMTS_Brussels_Network.xls” document and select the “UMTS network Transmitters” sheet.
2)
Double click on the “Transmitters” folder in “Network” window (or right click on “Transmitters” and select “Open Table”) to open the “Transmitters” tab, as shown in the following figure.
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3)
After opening the “Transmitters” table in Atoll, you will discover that the number of fields is larger than in the Excel file. It is because some of the parameters in Atoll don’t need the input from the user but Atoll will automatically fill in default values. The fields listed in the Excel document are those necessary parameters for the transmitters. Before copy/paste the Excel table in Atoll, the unnecessary columns have to be hidden. If the user try to paste the data and that don’t match with the “Transmitters” tab, an error message will be displayed. The following figure shows that the “Columns to be Displayed” tab can be accessed under “Display Columns…”.
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In the “Columns to be Displayed” tab, the unnecessary fields has to be unchecked for hiding the corresponding column, as shown in the following chart. Finally the “Transmitters” tab and the Excel tab have exactly the same columns.
4)
Copy the transmitter’s data of the “UMTS network - Transmitters” sheet of the Excel document (except the title line) and paste it in the “Transmitters” table in Atoll, as shown in the following figure.
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5)
After the import of data in the “Transmitters” table, the Map Window will be automatically updated, without refresh or saving the document.
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6)
The toolbar’s button
may zoom in or zoom out the Map Window (left click will
zoom in and right click will zoom out). The toolbar’s button
allows the user to
choose one region to be zoomed in.
7、 Pushing the toolbar’s button
assigns automatically different colors for each
transmitter in order to differentiate them, as shown in the following figure.
3.4.3.2 Global Parameters 1)
Right click on the “Network Settings” folder on “Parameters” window, open the “Network Settings Properties” dialogue. Select the “Global Parameters” tab, as shown in the following figure.
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The Global Parameters tab has the following options: Ö
DL Powers: define whether the power values on the downlink are Absolute or Relative to Pilot. The power values affected are the synchronisation channel, other common channel, HS-SCCH, and HSUPA powers defined in the cell properties, as well as the minimum and maximum traffic channel powers per R99 radio bearer. Atoll automatically converts the power values defined in the cell properties (i.e., synchronisation channel, other common channel, HS-SCCH, and HSUPA powers) when you change the option. On the other hand, the values for the minimum and maximum traffic channel powers have to be modified manually.
Ö
DL Load: define whether the total power values on the downlink are Absolute or a percentage of the maximum power (% Pmax). Atoll automatically converts the total power values when you change the option.
Ö
Interferences: define the method used to calculate interference on the downlink (I0 and Nt): ¾ I0: Atoll will calculate I0 using the noise generated by all transmitters plus thermal noise or you can select "Without pilot" and Atoll will calculate I0 using the total noise less the pilot signal and orthogonal part of traffic channels and other common channels. ¾ Nt: Atoll will calculate Nt as the noise generated by all transmitters plus thermal noise or you can select "Without useful signal" and Atoll will calculate Nt as the total noise less the signal of the studied cell.
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Ö
Handoff: define the parameters used to model soft handoff on the uplink. ¾ Default UL Macro-Diversity Gain: set a default value for the uplink gain due to macro-diversity on soft and soft-soft handovers. If you clear the Shadowing taken into account check box on the Condition tab when defining a coverage prediction or during a point analysis, Atoll uses this value. If you select the Shadowing taken into account check box on the Condition tab, Atoll calculates the UL macro-diversity gain, based on the standard deviation value of Eb⁄Nt on the uplink defined per clutter class. ¾ +MRC in Softer/Soft: Atoll selects the serving cell during a softer/soft handover by recombining the signal of co-site transmitters and multiplying the resulting signal by the rake efficiency factor and then comparing this value to the signal received at transmitters located on the other sites of the active set. Atoll chooses the greatest value and multiplies it by the macro-diversity gain.
Ö
Compressed Mode: define the parameters related to compressed mode. Compressed mode is used when a mobile supporting compressed mode is connected to a cell located on a site with a compressed-mode-capable equipment and either the pilot RSCP, or the received Ec⁄I0, or both of them are lower than the defined activation thresholds. ¾ RSCP Activation Threshold: select the RSCP Active check box and enter a RSCP Activation Threshold. ¾ Ec⁄I0 Activation Threshold: select the Ec⁄I0 Active check box and enter a Ec⁄I0 Activation Threshold. ¾ Eb⁄Nt UL and DL Target Increase: When compressed mode is activated, Eb⁄Nt requirements in UL and DL are increased. In order to take this into account, Atoll adds UL and DL Eb⁄Nt target increase values to the UL and DL Eb⁄Nt requirements set for each radio bearer.
Ö
HSDPA: define how total noise is calculated and how the CQI (Channel Quality Indicator) is evaluated for HSDPA. ¾ Nt: select "Total noise" and Atoll will calculate Nt as the noise generated by all transmitters plus thermal noise or select "Without useful signal" and Atoll will calculate Nt as the total noise less the signal of the studied cell. ¾ CQI: select “Based on CPICH quality” and Atoll will measure the CQI based on the pilot Ec⁄Nt or select “Based on HS-PDSCH quality” and Atoll will measure the CQI based on the HS-PDSCH Ec⁄Nt. Depending on the option selected, you will have to define either a CQI=f(CPICH Ec/Nt) graph, or a CQI=f(HSPDSCH Ec/Nt) graph in the Properties dialogue of the terminal equipment. The calculated CQI will be used to determine the best bearer.
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3.4.4 Cells parameters setting 1)
Open the “UMTS_Brussels_Network.xls” document and select the “UMTS network Cells” sheet.
2)
After importing transmitters, Atoll will create cells automatically. Generally, we need to delete all of the cells on Cells table to fix for “UMTS network - Cells” sheet. Right click Transmitters ->Cells->Open Table on Network window to open Cells table, select all of the cells and click “Delete”, as seen in the following figure.
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After deleting the cells, Cells table is empty, as seen in the following figure.
3)
Adjust the “Cells table” fields according to the Excel fields, copy the data of the “UMTS network - Cells” sheet and paste it the “Cells table” of Atoll, as shown in the
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following figure.
Note: Atoll supports transmitters with more than one cell (carrier), as shown in the following figure.
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4)
The “Name” field in the “Cells” table may be set according to the user preference. In Atoll, the default name is set as: “Transmitter_name (0）”, where “0” is the carrier number.
5) Frequency Bands: To open the “Frequency Bands” dialogue, select “Network Settings->Frequencies-> Bands” on “Network” window.
Open the “Frequency Band” dialogue. Define the central frequency, the first carrier, the last carrier and the bandwidth. By default the first carrier is 0 and the last carrier is 2, so there are 3 carriers. The frequency of the carrier 0 is the central frequency. This frequency is use for the calculation of the pathloss matrices. The frequency of the carrier 1 is the central frequency + 5MHz. Atoll UMTS supports multi-frequency band, by adding a new frequency band in the last line of the “Frequency Band” dialog box. Define TMA, Feeders, Transmitter Equipment and Repeater Equipment under Radio Network Equipment folder on Parameters window.
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3.4.5 Import and export The stand alone mode does not need to connect any external database, but it can be convenient to import/export network data from/to a database.
3.4.5.1 Import Access database 1)
Please find the “Brussels_UMTS.mdb” document in the “Reference_Data\Access_Database” folder in the CDROM. This document is an Access database file, containing the Brussels network data (but it does not contain the map data).
2)
In Atoll, select “File->New->From an Existing Database”, as shown in the following figure.
3)
In the browsing window select the “Brussels_UMTS.mdb” document from the CDROM.
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4)
After clicking on “Open”, Atoll automatically import all network data from the database to the Atoll project.
5)
Using “Centre in the Map Window” to lets the sites appear in the center of the window.
Note: The database does not include the map data, therefore the map data has to be imported separately.
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3.4.5.2 Export to Access database When all network data are set in Atoll, the data may be exported to a database file, so the network data can be easily shared and transferred. Select Menu “Document->Database->Export…”, and in the appeared “Export to a Database” dialog box, type the file name and then export the engineering data into the “.mdb” file.
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3.4.6 Add new sites The steps for importing the network data into Atoll have been introduced above. Atoll provides also another method to add new sites directly in the Map Window.
3.4.6.1 Add new sites one by one Clicking on the Atoll toolbar button
, turn the mouse into a honeycombs shape, as
shown in the following figure.
In the Map Window, a new site (including 3 transmitters) can be added directly with a click on the appropriate position. Simultaneously, Atoll adds the corresponding information into the data sheets. Press the “Ctrl” key to lay continuously sites in the Map Window. When the laying of sites is finished, press the “Esc” key to withdraw from the current status. It is possible to add new transmitters to an existing base station, as shown in the following figure.
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Do not select “Hexagonal Design” in the Network tab, will hide the honeycomb shape of the new sites.
3.4.6.2 Add a group of sites Click on the Atoll toolbar button
, then a polygonal symbol will be added behind the
cursor. Then draw a polygon in the Map Window to add a new group of sites inside the selected region. Sites will be automatically layed inside the region according to a certain inter-site distance, as seen in the following figure.
After drawing the polygon, the following figure will appear.
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Similarly, Atoll will add the corresponding information to the new sites into the data sheets. If the user wants to delete a group of sites, it can be done in the “Site” table as explain above or more quickly through the following operations: Right click on a group of the “Hexagonal Design” folder and select “Delete”, then the entire group of sites will be deleted.
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3.4.6.3 Template management In the previous sections, a new group of sites have been added by selecting a template and by drawing a polygon. Atoll allows the user to choose among different templates and to edit a specific template. The templates are available in the Atoll toolbar, as shown in the following figure.
Select Station Tamplates under Network Settings folder on Parameters window to manage station tamplates.
The user can edit the template’s parameters by clicking on “Properties” button. The user may also add a new template or delete an existing one.
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In the appeared dialog box, the template’s properties can be edited (for example, the number of sectors, the antenna model, the azimuth, the tilt, the height and so on).
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3.5 Propagation model Atoll integrates many propagation models including Okuruma-Hata, Cost-Hata, SPM. ITU370, ITU526, ITU 529, Longley-Rice, Erceg-Greenstein(SUI) and WLL models. The following models are the most commonly used for UMTS projects: Okuruma-Hata, Cost-Hata and SPM.
3.5.1 SPM propagation model SPM (Standard Propagation Model) is a model originating from Planet and using K parameters. The SPM model has also a relation with the Hata model. The SPM model may be calibrated with CW measurements.
3.5.1.1 Import of CW measurement Note: the CW measurements used by this document are just for the purpose of helping the user to be familiar with the use of the software. The detailed requirements for CW measurements (including data quantity) are described in the SPM model calibration document, which can be provided upon request. To import the measurements, there are 2 methods: Copy/Paste and import. 1) Copy/Paste method (1) Open the “Site89_2 survey” worksheet in the “UMTS_Brussels_Network.xls” document. This worksheet provides the measurements corresponding to the “Site89_2” cell with the longitude, the latitude and the received signal level for each sampling point
(2)
In Atoll, right click on the “CW Measurements” folder in the “Network” window, and
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select “New” in the context menu, as shown in the following figure.
(3)
In “New CW Measurement Path” dialog box, fill in the file name, the corresponding transmitter, the receiver height. Then paste the Excel table data into the table, as shown in the following figure.
Note: Set the coordinate system with “WGS84” corresponding to the projection system use in the Excel tab.
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After clicking on “OK”, the test data are immediately displayed on the Map Window. Each point represents a measurement sampling.
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2) Import method (1) Atoll supports the formats .dat, .txt, .csv and .hd (PlaNET). (2) Please find 3 .txt documents inside the “Reference_Data” folder of the CDROM. (3) In Atoll, right click on “CW measurements” in the “Network” window and select “Import” as shown in the following figure.
(4)
In the appeared “Open” dialog box, browse for the document to be imported. Atoll supports the multi selection of files. Several measurements corresponding to the same transmitter can be imported at the same time, but if the measurements belong to different transmitters, then each measurement has to be imported separately. Provided test data corresponding to different transmitters, the measurements have to be imported one by one.
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(5)
The appeared dialog box contains two tabs, “General” and “Setup”. In the “General” tab, define the corresponding reference transmitter, the frequency and receiver height, as shown in the following figure.
(6)
In the “Setup” tab, fill in the “1st Measurement Row” field with 2 (because the drive
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test document has a title line and the data start at the second line). Then click on the “Setup” button.
(7)
After clicking on the “Setup” button, the “CW Measurement Setup” dialog box appears, as shown in the following figure. Define “X-Coordinates” and “Y-Coordinates” fields with respectively the longitude and latitude.
(8)
Click on the “Import” button in the import main window and then the measurement data will be imported into the project. After the import, the measurement data will be automatically put in the “CW Measurements” folder of the “Network” Window.
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Use “Centre in the Map Window” function to display the imported measurements in the center of the map.
Import also the “Measures_Site69_U1_Street.txt” and the “Measures_Site69_U3_Street.txt” documents into the project by the similar operations above. Please note that the 3 measurements files correspond to different transmitters. (9)
Setting of the CW measurements display — — double click on the “CW measurement” folder and open the “CW measurements properties” dialog box. In the “Display” tab, define the “Display type” as “Value Intervals” and “Field” as “M(dBm)”.
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3.5.1.2 Automatic calibration of the SPM model A good propagation model calibration requires having enough data, filtering them and carrying a careful tuning of each factor of the model. The tuning steps are quite complex, which is not described in details in this document. A document of specific SPM model calibration can be provided upon request. Bellow the SPM model basic operations are introduced. The SPM automatic calibration may help the user to find the best K parameters, the “Effective antenna height” method, the “Diffraction” method and the clutter losses. (1) Duplicate the existing standard propagation model and make the calibration for the duplicated model. This method has the advantage to preserve the existing model and to allow a calibration of the SPM for each kind of environments.
(2)
Right click on the Copy of Standard Propagation Model and select “Calibration...”. Select the CW measurement(s) and click on the “Next” button.
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(3)
In the appeared dialog box, select the K parameters that will be used for the calibration. It is recommended not to select the K6 parameter.
Double click on a K parameter or select a K parameter and click on “Define Range”, will open the “Define Domain” dialog box, where the range of the K parameter can be defined, as shown in the following figure. But generally it is recommended to keep the default values defined above.
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After choosing the range, click on “OK”. (4)
According to the selected CW measurements and the tuning parameters, Atoll calibrates automatically the SPM propagation model.
(5)
After the computation, Atoll provides in the same dialog box the results and the statistics concerning the model, as the average error and the standard deviation. According to the results, the user may choose to commit the K parameters list by clicking on the “Commit” button.
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Note: the automatic model calibration is only a mathematical computation method. The result depends on the quality of the CW measurements. Therefore a high quality of CW measurements is required. (6)
If the results are not satisfactory and the K parameters have been already committed, the propagation model can be deleted by right clicking on it and selecting “Delete” (or by pressing the “Delete” key on the keyboard).
(7)
If after the calibration, the model has to be used in other projects, copy it by with CTRL+C and paste it with CTRL+V in the “Modules” tab of another project.
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3.5.1.3 Model validation with CW measurements Normally, the validity of the model is checked with the standard deviation. The lower the value is, the better the model is. Generally, the standard deviation has to be less than 8dB. Another method is using the analysis tool to compare each measurement point to the associated prediction. 1)
Right click on the CW measurement in the “Network” window. Then select “Properties” in the context menu.
2)
On the appeared properties dialog box, select the calibrated propagation model and click on “OK”.
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3)
Right click on the CW measurement and select “Refresh Geo Data”.
4)
Afterward right click on the CW measurement and select the “Calculations-> Calculate Signal Levels” function.
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5)
So the selected propagation model will be used. Right click on the CW measurement and select “Display Statistics”. Atoll will display the statistics report and the standard deviation of the measurement is available.
6)
Right click on the CW measurement and select “Open the Analysis Tool”.
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Atoll displays automatically the “CW measurements” window, as shown in the following figure. With the cursor clicking in the “CW measurements” window and Atoll will simultaneously represent the drive test position in the Map Window. For the selected point Atoll provides the measurement value (M) and the predicted value (P). On the right of the “CW measurements” window the user can add an additional result, as the difference between M and P.
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Note: For the document with the detailed model calibration operations, please contact Atoll support team.
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3.5.1.4 Set the propagation model for each transmitter After the calibration of the propagation model, open the “Transmitters” tab and select the propagation model in pull-down menu of the “Main propagation model” field. The user may use Ctrl + D.
If all transmitters use the same propagation model, then the quickest way is to define the model in the “Transmitters properties” dialog box. In the “Propagation” tab, select the propagation model and choose the radius and the resolution (Normally the resolution is the same as the digital map).
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3.5.2 Cost-Hata model Okuruma-Hata and Cost-Hata use both the standard Hata formula. The Okuruma-Hata is suitable for a frequency smaller than 1500MHz and Cost-Hata is suitable for a frequency bigger than 1500MHz. So Cost-Hata will be used for a CDMA network. Both Okuruma-Hata and Cost-Hata can be calibrated. The following paragraph introduces only the calibration of the Cost-Hata model, but the calibration of the Okuruma-Hata model is similar.
3.5.2.1 Import of CW measurements Please refer to the paragraph 3.5.1.1.
3.5.2.2 Automatic calibration of the Cost-Hata model The following paragraph does not make an exhaustive introduction of the automatic calibration of the Cost-Hata model. Automatic calibration is quite complex because of the detailed adjustment steps. Please contact the Atoll Support Team for more information. Firstly, the CW measurements must be in a sufficient number and of good quality, in order to calibrate accurately the Cost-Hata model. The Cost-Hata calibration tool might help the user to find the best A1, B1, Diffraction Factor and Formula Correction for each type of clutter. 1)
Right click the Cost-Hata model and select “Duplicate” will duplicate the Cost-Hata model. So, the calibration will not affect the parameters of the existing Cost-Hata model.
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2)
Double click on the folder “Copy of Cost-Hata” will open the properties dialogue. The Cost-Hata propagation model can use an environment formula appropriate to each clutter class when calculating. Furthermore, Cost-Hata propagation model can “add diffraction loss” and take into account “limitation to free space loss”.
Ö
Add diffraction loss: The Cost-Hata propagation model can take into account losses due to diffraction, using a 1-knife-edge Deygout method, and using the ground altitude given in the DTM. The diffraction can be weighted for each Hata environment formula.
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Limitation to free space loss: When using a Hata-based propagation model, it is possible to calculate a theoretical path loss that ends up being lower than the free space loss. In Atoll, you can define any Hata-based propagation model to never calculate a path loss that is lower than the calculated free space loss per pixel.
3)
Right click on the folder “Copy of Cost-Hata” and select “Calibration” will open the calibration wizard. Select one or several CW measurement(s) and click “Next”, as shown in the following figure.
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4)
In the appeared dialogue select the parameters that Atoll will calibrate and click “Next”, as shown in the following figure.
5)
Atoll automatically calibrates the Cost-Hata model and displays the parameters before and after the calibration. Atoll provides also the root mean square, the average and the standard deviation before and after the calibration. According to the results the user can choose to commit the result by clicking on the “Commit” button.
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6)
If a propagation model is not useful, it’s easy to delete it by right clicking on the Cost-Hata model and select “Delete” or use the “Delete” key on the keyboard.
7)
If the user wants to use the propagation model in another Atoll project, just copy the existing propagation model with CTRL+C and then paste it in the new project with CTRL+V.
3.5.2.3 Cost-Hata model properties 1)
Double click on “Copy of Cost-Hata” in “Parameters” window (or right click on the “Copy of Cost-Hata” icon and select “Properties”) will open the “Copy of Cost-Hata properties” dialog box.
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2)
In the “Copy of Cost-Hata properties” dialog box, the propagation formula has to be set for each kind of clutter. Click on the “Formulas” button on the bottom left for checking “Copy of Cost-Hata” formulas and default values. The propagation parameters have to be set according to the user experience.
3)
Set the appropriate formula for each kind of clutter in the “Copy of Cost-Hata” properties dialog box. The following figure is an example of the “Copy of Cost-Hata” properties setting (the properties dialog box has to be set according to the user’s network environment).
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4)
The next step is to set up the “Copy of Cost-Hata” model for all transmitters. Right click on the ”Transmitter” folder on “Network” window, select “Properties”, and open the “Transmitters properties” dialog box. In the appeared dialog box, select the “Propagation” tab and select “Copy of Cost-Hata” for the propagation model, as shown in the following figure.
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3.6 Propagation matrix calculation 3.6.1 Preliminary work Before launching the calculation of the pathloss matrices, the following preliminary work has to be done.
3.6.1.1 Resolution of predictions and receiver altitude The user needs also to set the resolution for coverage studies. This resolution may be equal or lower than the map’s accuracy. The higher the resolution is the longer the processing time is. 1)
Right click on the “Predictions” folder of the “Network” window and select “Properties” (or double click directly on the “Prediction” folder).
2)
In the “Predictions properties” dialog box, set the “Default resolution” value to 20m (this will be the resolution for the following prediction studies). Clicking on “Private Directory” allows the user to select the path loss document, which will be used to store the pathloss matrices. The user can either select the “Embedded” option to store the pathloss matrices in the current Atoll project, or select the “.\xxxxx.losses” option to store the pathloss matrices in the external “.losses” folder which in the same directory of the ATL file, or use the “Browse” option to select a folder to store the pathloss matrices externally.
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3.6.1.2 Setting the Computation Zone If there is no computation zone defined, the pathloss matrices for all transmitters will be calculated, based on the calculation radius and the signal threshold. If the user wants to calculate the pathloss matrices only for a specific region, a Computation Zone can either be imported or directly drawn in the Map Window. 1) Drawing the Computation Zone (1) Right click on “Computation Zone” in the “Geo” tab of Explorer Window and select “Draw” in the context menu.
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(2)
Then draw a polygon with the mouse to delimitate the region, for which the propagation will be calculated.
(3)
You can also create a computation zone to be a polygon, rectangle or combine/delete/split vector objects by using the Vector Editor on toolbar as follows:
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2) Import of the Computation Zone (1) Right click on “Computation Zone” in the “Geo” tab of the Explorer Window and select “Import” in the context menu.
(2)
In the appeared dialog box, browse for the “Reference_Data\Computation_Zone” folder in the CDROM and open the “Brussels_Computation_Zone.mif” document.
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(3)
After opening the document, the “Vector Import” dialog box will appear, as shown in the following figure. Press the “Import” button to import the computation zone.
(4)
After the import, the computation zone will appear in red, as seen in the following figure.
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(5)
Right click on “Computation Zone” in the “Geo” tab and select “Export”. Then export the computation zone with .MIF, .agd (Atoll map format) or .shp format. This computation zone can be imported in other projects.
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3.6.2 Propagation and prediction studies calculation The calculations in Atoll are divided in two parts, pathloss matrices calculation and prediction study calculations. Propagation calculation: Calculation of the propagation loss of the link between each transmitter and each pixel. The calculation results will be saved in the path loss matrices. The pixel size is the transmitter calculation resolution. Coverage study prediction Atoll reads the data from the pathloss matrices, which was calculated previously, and make a post processing to calculate and display the coverage study. If the pathloss matrices have been calculated and there is no modification on the RF parameters (e.g. the site location, the antenna model, the azimuth and so on), Atoll does not automatically recalculate the pathloss matrices. If some of the RF parameters of some transmitters are changed, Atoll will recalculate the pathloss matrices for these transmitters. Right click on the folder “Predictions” in the “Network” tab and select “New”, as shown in the following figure.
In the appeared “Prediction Types” dialog box, Atoll provides by default 14 types of predictions. The first 5 predictions are concerning the DL pilot power without knowing the load conditions, so the predictions can be done before the Monte Carlo simulation.
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3.6.2.1 Best server prediction 1)
Select “Coverage by Transmitter” and clicking “OK”, then open the “Coverage by Transmitter properties” dialog box. In the “General” tab, the “Resolution” of the prediction can be set.
2)
In the “Condition” tab, set the “Signal level” threshold (for example -120dBm) and select “Best Signal Level” in the Server’s field.
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The default value for the Cell Edge Coverage Probability is 75%. If the standard deviation is set in the Clutter Classes properties, Atoll will use this value to calculate the Shadowing Margin. Atoll supports Cell Edge Coverage Probability lower than 50%. 3)
In the “Display” tab, define the display attributes, such as coverage transparency and so one.
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4)
Click on the “OK” button to close the dialog box. Clicking on the toolbar button (or F7 on the keyboard), Atoll starts the computation and open automatically the “Event viewer” window, which shows the prediction calculation progress.
If the “Propagation calculation” is already calculated, Atoll will start the computation of the coverage study. Each prediction study is stored automatically in the “Prediction” folder of the “Network” window, as shown in the following figure.
The generated prediction study is locked automatically. So if any parameters are changed this prediction study result will not be changed. If the prediction study has to be recomputed, right click on this prediction study and unlock the study before starting the computation.
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3.6.2.2 Coverage by Signal Level prediction 1)
In the “Prediction Types” dialog box select “Coverage by Signal Level”.
2)
In the “Condition” tab, fill in -120dBm for the signal level threshold and select “All” for the Server’s field.
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3)
In the “Display” tab, the user can set the display attributes, such as the intervals for the predicted values, the color and so one. The Min and Max values and the colors can be set by clicking on “Actions->Shading”.
4)
After defining the properties, similarly as for the “Best Server prediction”, click on the toolbar button
(or on the keyboard F7), to start the computation.
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5)
The prediction of the coverage by signal level is represented in the following figure.
6)
Selecting “View->Legend Window”, displays the legend in the Map Window.
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7) Tip text For most object types, such as sites, transmitters, prediction maps, information about each object can be displayed on the map window in the form of a tool tip that is only visible when the pointer is over the object. To activate the tool tip function, click the Display Tips button
on the toolbar.
Note: If more than one coverage prediction is displayed on the map, the tool tips display the tip text for all the coverage predictions available.
3.6.2.3 Overlapping Zones prediction 1)
Select “Overlapping Zones” in the “Prediction Types” dialog box.
2)
In the “Condition” tab, set the signal level threshold to -120dBm, select “Best Signal Level” for the server field and set the “Margin” to 5dB.
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3)
The coverage map is shown in the following figure.
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different pilots have a difference less than 5dB. “Number of servers >=3” represents the region where the received signal level of 3 different pilots have a difference less than 5dB. And so one。
3.6.2.4 Force calculation If there is no change in the RF parameters, Atoll won’t recalculate the pathloss matrices before calculating a prediction. But Atoll also provides the “Force Calculation” function, which can force the calculation of the pathloss for all transmitters. Click on the toolbar button
to force the recalculation of all path loss matrices.
3.6.2.5 Prediction template management If the prediction default values don’t match the user’s need, Atoll allows the user to save a prediction template in order to store the parameters setting. 1) Right click on a prediction study and choose “Save as a Customised Prediction”.
2)
A “Save as” dialogue window will prompt up. Define the name and the path of the XML file you would like to save, as shown in below the figure. By default, the storage path is the installation folder of Atoll. All the customized prediction studies are saved in this Studies.XML file.
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3)
The prediction template will be added in the “Prediction Types” dialog box.
4)
If you want to delete this template, select it and click “delete” button.
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3.7 Simulation 3.7.1 Traffic model The UMTS traffic model depends of the UMTS Parameters of the “Parameters” window: “Environments”, “User Profiles”, “Terminals”, “Mobility Types” and “Services”.
3.7.1.1 Services 1)
By default, Atoll provides 7 kinds of service types. Double clicking on the “Voice” type will open the “Voice properties” dialog box.
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2)
Set the Uplink and Downlink Activity Factors/Average requested throughput in the “General” tab.
3)
On “UMTS” tab to define other parameters of the service. For more information, please refer to User Manual.
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4)
R99 Radio Bearer. Click on the button
on the right of the field “R99 Radio
Bearer”. In the appeared dialog box “LCD12 properties” define the Nominal Rate, the Coding Factor, the Spreading Factor, the DPCCH/DPCH Power Ratio, the Min Allowed Downlink Traffic Channel Power and the Max Allowed Downlink Traffic Channel Power.
5)
The user can specify a new type of Service —— Right click on the “Services” folder, select “New” and set up all the parameters in the appeared dialog box.
3.7.1.2 Mobility Types 1)
Atoll provides by default 3 Mobility Types (the name depends of the speed). Double clicking on the “50km/h” mobility opens the “50 km/h properties” dialog box.
2)
In the “General” tab define the speed of mobility.
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3)
In the “UMTS” tab define the Ec/Io Threshold and the HS-SCCH Ec/Nt Threshold according to the mobility.
4)
The user can specify a new type of Mobility —— Right click on the “Mobility Types” folder, select “New” and set up all the parameters in the appeared dialog box.
3.7.1.3 Terminals 1)
Atoll provides 4 kinds of Terminals by default. Double click on “Mobile phone” and open the “Mobile phone properties” dialog box.
2)
In the “General” tab define the name.
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3)
In the “UMTS” tab define the UMTS Equipment, the Noise Figure, the Min and Max Power, the Gain, the Losses, the Active Set Size. And whether the Terminal supports HSDPA and HSUPA. For more information, please refer to User Manual.
4)
The user can specify a new type of terminal —— Right click on the “Terminals” folder, select “New” and set up all the parameters in the appeared dialog box.
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3.7.1.4 User Profiles 1)
Atoll provides by default 2 kinds of user profiles. Double click one “Business User” to open the open the “Business User properties” dialog box.
2)
Various parameters can be set up in the “General” tab. For CS services, fill in the “Terminal”, “Calls/hour” and “Duration” fields. For PS services, fill in the “Terminal”, “Calls/hour”, “UL Volume (Kbytes) and “DL Volume (Kbytes)” fields.
3)
The user can specify a new type of User Profile. Right click on the “User profiles” folder, select “New” and set the parameters in the appeared dialog box.
3.7.1.5 Environments 1)
Atoll provides by default 4 kinds of Environments (classify by clutter name). Double click on “Dense Urban” and open the “Dense Urban properties” dialog box.
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2)
Various parameters can be set up in the “General” tab. For each kind of “User Profile”, fill in the corresponding “Mobility” and “Density” fields.
3)
In the “Clutter Weighting” tab, the user can specify a weight and an indoor percentage for each clutter class. The higher the weight is, the higher the user density is. If the weight is 0 for a specific clutter, then no user will be distributed on this clutter.
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3.7.2 Creating Traffic Maps Atoll provides 3 different methods to create the traffic maps. 1) User profile traffic map Ö User profile environments Ö User profile densities 2) Sector traffic maps Ö Uplink and Downlink Throughputs Ö Total Number of Users (All Activity Statuses) Ö Number of Users per Activity Status 3) User density traffic maps per (No. of Users/km2) Ö All activity statuses Ö Active in uplink Ö Active in downlink Ö Active in uplink and downlink Ö Inactive Right click on “Traffic” in the “Geo” tab and select “New map”, as seen in the following figure.
In the appeared “New traffic Map” dialog box, the above 3 methods for traffic map creation can be selected, as shown in the following figure.
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In the following paragraphs, 3 methods for traffic map creation will be introduced with the reference data from the CDROM.
3.7.2.1 User profile Traffic map This kind of traffic map can be drawn manually or imported from external files. 1) Draw manually (1) In the “New Traffic Map” dialog box, select “User profile traffic map” and “User profile environments”, then click on “Create”.
(2)
Atoll will display the “Environment map editor” on the top of the Map Window. In the “Environment map editor”, the user can choose one kind of environment, like “Suburban”
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(3)
Then click on the
button to draw a polygon in the desired area corresponding
to a “Suburban” environment, as shown in the following figure.
(4)
With the same method draw the “Dense Urban” zone.
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(5)
If the drawing polygon is not good, it can be deleted with the
button.
2) Import a traffic map In the “Reference data\ traffic\ Raster_Traffic” folder of the CDROM, a traffic map is prepared. It is the same map as the clutter map. Note: The clutter map can be used as a traffic map, especially for complex environments, because it is difficult to draw manually this kind of map. (1) Select “User profile traffic map” and “User profile environments” in the “New traffic Map” dialog box and then click on the “Import” button.
(2)
In the appeared dialog box, select the “Reference data\ Traffic\ Raster_Traffic\
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BIndex” in the CD and import it.
(3)
Atoll will automatically open the “User profile environment based traffic map properties” dialog box where the user can define the display color, the legend and the code for each environment.
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3) Export a traffic map A traffic map can be exported from the Atoll document. Right click on the “User profile environment based traffic map” folder and select “Save As” to export the traffic map.
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3.7.2.2 User profile traffic map - User profile densities This kind of traffic map may also be drawn manually or imported from external files. The drawing method is the same of the method introduced for the traffic map “Map Based on Environments”. In the following part, the method for importing a traffic map from the CD is introduced. 1) Select “User profile traffic map” and “User profile densities” in the “New Traffic Map” dialog box and then click on the “Import” button.
2)
In the appeared dialog box, select “Reference_Data\Traffic\Vector_Traffic\Airport\Airport_Building.mif” file from CDROM and import it.
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3)
After clicking “Open” button, define the coordinate system and click “Import” in the “Vector Import” dialog box.
4)
In the appeared dialog box, select the “Traffic” tab to define the indoor percentage and the weight for each clutter.
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5)
Import with the same method the other vector traffic maps located in the “Reference_Data\Traffic\Vector_Traffic” folder.
3.7.2.3 Sector traffic map -Throughputs in uplink and downlink Sector traffic map can be either generated by input data manually or imported from external files. The input parameters for each serving cell and each service are the uplink and downlink throughputs. 1) Input the data manually (1) Copy the “HSUPA_Traffic(Throughput)_Per_Sector.xls” traffic data located in the “Reference_Data \Traffic \Cell_Traffic” folder, except the title line.
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(2)
Select “Sector traffic map” in the “New traffic Map” dialog box, select “Uplink and Downlink Throughputs” and click on the “Create” button.
(3)
In the appeared “Sector traffic map” dialog box, select an existing Coverage by Transmitter prediction and paste the traffic values, as shown in the following figure.
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(4)
After clicking the “OK” button, Atoll appears a “Sector traffic map properties” dialog box. In the Traffic tab, fill in the percentage of each type of Terminal, the percentage of each type of Mobility, the clutter weightings and indoor weightings.
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(5)
After clicking on the “OK” button, the traffic map will be loaded on the Map Window. Each best server zone defined by the selected Coverage by Transmitter prediction will have a distributed traffic, as shown in the following figure.
(6)
Create the other sector traffic maps “R99_Traffic(Throughput)_Per_Sector.xls” and “HSDPA_Traffic(Throughput)_Per_Sector.xls” with the same method located in the “Reference_Data\Traffic\Cell_Traffic” folder.
2) Import a traffic map (1) Select “Sector traffic map” in the “New traffic Map” dialog box, select “Throughputs in uplink and downlink” and click on the “Import” button.
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(2)
In the appeared dialog box, select “Reference data\Traffic\Cell_Traffic\ Cell traffic map (throughput) - R99 traffic.agd” from the CDROM and import it.
(3)
After clicking “Open” button, define the coordinate system and click “Import” in the “Vector Import” dialog box.
(4)
In the appeared dialog box, fill in the percentage of each type of Terminal, the percentage of each type of Mobility, the clutter weightings and indoor weightings in the Traffic tab.
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(5)
After clicking on the “OK” button, the traffic map will be loaded on the Map Window. Each best server zone defined by the selected Coverage by Transmitter prediction will have a distributed traffic, as shown in the following figure.
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(6)
Import with the same method the other sector traffic maps located in the “Reference_Data\Traffic\Cell_Traffic” folder.
3.7.2.4 Sector traffic map - Total number of users (All activity statuses) Sector traffic map can be either generated by input data manually or imported from external files. The input parameters for each serving cell and each service are the total number of users. The method of creating and importing this map is the same as “Sector traffic map -Throughputs in uplink and downlink” refer above, it’s not necessary to redo again.
3.7.2.5 Sector traffic map - number of users per activity status Sector traffic map can be either generated by input data manually or imported from external files. The input parameters for each serving cell and each service are the number of active users (DL+UL, DL only, UL only) and inactive users. The method of creating and importing this map is the same as “Sector traffic map -Throughputs in uplink and downlink” refer above, it’s not necessary to redo again.
3.7.2.6 User density traffic map (no. of users/km2) User density traffic maps provide the number of connected users per unit surface, i.e., the density of users, as input. This can be either the density of users per activity status or the density of users including all activity statuses. Atoll provides the following type of traffic map per user density: Ö All Activity Statuses Ö Active in Uplink: Ö Active in Downlink Ö Active in Uplink and Downlink Ö Inactive 1) Input the data manually (1) Right click on “Traffic” in the “Geo” tab, select “New Map”. In the appeared dialog box select “User density traffic map (no. of users/km2)” and “All activity statuses”, then click on the “Create” button.
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(2)
The “Density map” properties window will appear. Then define the distributions for Terminals, Mobilities, Services and Clutter in the “Traffic” tab. In the “Display” tab, the color of the traffic map can be defined. as shown in the following figure.
(3)
Right click on “User density traffic map 1” in the “Traffic” folder and select “Edit”.
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(4)
The vector editor function will be activated and then the "New Polygon/New Rectangle” feature can be used for drawing a new Traffic region in the Map Window.
(5)
Click “Esc” button to quit of editing. Double click on the Traffic region and in the appeared dialog box define the corresponding Traffic Density.
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2) Export of cumulated traffic maps Cumulated traffic of all the traffic maps can be exported in bil and grd formats. (1) Right click on the “Traffic” folder and select “Export Cumulated Traffic…”.
(2)
In the appeared “Save As” dialog box enter a file name and click on the “Save” button.
(3)
Then in the appeared “Export” dialog box, define the area to export, the terminal, the mobility type, the service, the traffic maps to consider and the direction, as seen in the following figure.
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The export of cumulated traffic map can be done with the following parameters and options: Ö Region ¾ Entire Project Area: export the cumulated traffic over the entire project. ¾ Computation Zone: export the cumulated traffic contained by a rectangle encompassing the computation zone, whether or not the computation zone is visible.
Ö Ö
Note: The exported density map will be a rectangle whatever the original map is a polygon or rectangle, the area of the Computation Zone will be 0. Resolution in meter Density map resolution Data to be exported in the cumulated traffic ¾ Terminal: type of terminal that will be exported. ¾ Service: service that will be exported. ¾ Mobility: mobility type that will be exported. Note: A density map can not include CS and PS service, because the
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Ö
Ö
computation methods of Active Users are different. Activity ¾ All Activity Statuses: export all users without any filter by activity status. ¾ Uplink: Select export mobiles active in the uplink only. ¾ Downlink: export mobiles active in the downlink only. ¾ Uplink/Downlink: export only mobiles with both uplink and downlink activity. ¾ Inactive: export only inactive mobiles. Traffic maps to be used Select the traffic maps to be exported
3) Import the exported cumulated traffic maps into Atoll (1) Right click on “Traffic” in the “Geo” tab and select “New map”. In the appeared dialog box select “User density traffic map (no. of users/km2)” and “All activity statuses”, then click on the “Import” button, as shown in the following figure.
(2)
Then define the distributions for Terminals, Mobilities, Services and Clutter. In the “Display” tab, the color of the traffic map can be defined.
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(3)
The Traffic Density map is put automatically in “User density traffic map #” in the “Traffic” folder.
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3.7.3 Simulation After the establishment of traffic map, the Monte Carlo simulation can be calculated. 1) Cell capacity limits Open the “Cells” table and define the upper limits for downlink and uplink traffic loads for cells. Note: Using these limits, it is possible to model additional constraints in Monte Carlo simulations, i.e., resource saturation can occur when the user-defined cell capacity limit is achieved. 2)
Right click on the “Simulations” folder in the “Network” window and select “New”.
3)
In the appeared dialog box, in the “General” tab, set the “Number of Simulations”, the “Information to retain” (the level of detail in the output), the Cell Load constraints and “Bearer Downgrading”.
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If downgrading is selected, when a constraint is not respected, user radio bearers with services supporting bearer downgrading are downgraded. If the constraint is still not satisfied after downgrading, users are rejected. If downgrading is not selected, users will be rejected immediately, starting with users with the lowest service priority, if a constraint can not be respected. 4)
In the “Traffic” tab, select the traffic map which will be used for the simulation and the “Global Scaling Factor”. For example select “User density traffic map 1”, as shown in the following figure.
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5)
In the “Advanced” tab choose the “Generator initialisation” and the conditions of convergence.
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6)
After clicking on “Calculate”, the simulation starts immediately. Or click “OK” button, the simulation will start when the user clicks on the “Calculate” button
on the
toolbar (or press F7 on the keyboard). The simulation process will be displayed in the “Event viewer” window.
Note: When working with a distributed calculation server, UMTS Monte-Carlo simulations are calculated in parallel if the generator initialization is set to 0. 7)
The simulation results are available in the simulation folder. Double clicking on a simulation opens the simulation properties dialog box with the simulation report. The simulation report is composed with 5 tabs, “Statistics” (statistical results), “Sites”, “Cells” (cells results), “Mobiles” (Mobiles results) and “Initial Conditions”, as shown in the following figure.
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8) Commit the results. The Uplink and Downlink cell loads of each cell are calculated in Monte Carlo simulations and the results are provided in the Cells tab. Right click on a group of simulations and select “Average Simulation” in the context menu to open the average simulation report. Click on the “Commit Result” button in the Cells tab to commit the cell loads into the Cells table. These values will be used in the prediction studies introduced in the next section. 9) Simulation replay A simulation can be replayed (right click on one simulation and select Replay).
3.8 Point analysis tool Atoll provides a point analysis window to analyze the network performance. Clicking on the toolbar icon
or selecting “View->Point analysis”, opens the analysis
window. The cursor turns into a circle representing the receiver. Put the receiver on the Map Window, as shown in the following figure.
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3.8.1 Profile In the “Profile” tab, the user may analyze the terrain profile between the transmitter and the receiver, the received signal level, the link budget and other information. The desired transmitter (for the profile analysis) can be selected in the “Profile” window or directly on the map. Atoll automatically displays the terrain profile between the selected transmitter and the receiver. In the “Profile” tab, the point to point signal power is real-time calculated.
Click on the “Link budget” button
to open the “Link Budget” window, with the
information about the link budget between the transmitter and the receiver.
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3.8.2 Reception In the “Reception” tab, the received signal level values for the strongest transmitters are given with bars. The received power values are calculated according with the stored path loss matrices.
3.8.3 AS Analysis In the “AS Analysis” tab, the received Ec/Io for the best server, the active set and the others transmitters are given with bars.
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The availability (“
” means not available) for the pilot and the service in UL and DL are
calculated according to the selection of the receiver position, the Carrier, the Terminal, the Service, the Mobility, the DL rate and UL rate.
Double click on a Transmitter to open the “Analysis Detail” window corresponding to this transmitter.
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3.8.4 SC Collisions In the following example, the sites “Site76_U2” and “Site7_U2” have the same Scrambling Code and therefore produce Scrambling Code interferences.
3.8.5 Details The “Details” tab gives the receiving power for all cells, as seen in the following figure.
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3.9 Other prediction studies In the 3.6 section, 14 kinds of coverage prediction studies were introduced. The following 11 prediction studies need uplink and downlink load conditions, which may be either obtained by a Monte Carlo simulation or set manually. The following coverage of Ec/Io (Pilot Reception Analysis (Ec/Io)) will be an example for these 9 prediction studies.
3.9.1 Prediction parameters setting 1) 2)
In the “Prediction Types” dialog box, select “Pilot Reception Analysis (Ec/Io)”. In the appeared dialog box, select the “Condition” tab and define: ¾ Using simulation result (it is recommended to select a group to use average result of the group) ¾ the Terminal ¾ the Service ¾ the Mobility
3)
Define the display properties in the “Display” tab.
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4)
Clicking on the “OK” button to close the dialog box. Clicking on the toolbar button (or F7 on the keyboard), start the computation.
The following figure shows the Ec/Io prediction plot.
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3.9.2 Standard prediction studies Atoll provides 14 kinds of prediction study. Through the display setting the number of prediction types provided by Atoll may reach several dozen to one hundred. The following predictions are the most commonly used: Prediction Types
Displayed Values
Coverage by Transmitter
Transmitter
Coverage by Signal Level
Signal Level (dBm, dBµV or dBµV/m) Pathloss (dB)
Overlapping Zones
Number of Servers
Total Noise level Analysis
Minimum Noise Level Average Noise Level Maximum Noise Level Minimum Noise Rise Average Noise Rise Maximum Noise Rise
Pilot Quality Analysis (Ec/Io)
Ec/Io Ec/Io Margin Reliability Level
Service Area Analysis (Eb/Nt) DL
Eb/Nt Margin Effective Eb/Nt Maximum Eb/Nt Required Power Required Power Margin Reliability Level Rate
Service Area Analysis (Eb/Nt) UL
Eb/Nt Margin Effective Eb/Nt Maximum Eb/Nt Required Power Required Power Margin Rate
Effective Service Area Analysis (Eb/Nt)
Reliability Level
(DL+UL) Handoff Zones
Potential Active Transmitter Number
Pilot Pollution Analysis
Polluter Number
Scrambling Code Collision Zones
Zone covered by the same Scrambling Code
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HSDPA Quality and Throughput Analysis
RLC Peak Rate (kbps) HS-SCCH Ec/Nt (dB) HS-PDSCH Ec/Nt (dB) CQI
HSUPA Quality and Throughput Analysis
RLC Peak Rate Required E-DPDCH Ec/Nt (dB) Required Terminal Power (dBm)
Inter-technology interferences Level
Max Noise level
Analysis DL
Average Noise level Max Noise level Min Noise Rise Average Noise Rise Max Noise Rise
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3.9.3 HSDPA Atoll supports HSDPA (High Speed Downlink Packet Access) since the version 2.4. The following paragraph introduces HSDPA parameters and predictions. 1) Define Cells Table Open the cell properties window of a transmitter and define the type of HSPA support among: NONE HSDPA HSPA HSDPA and HSUPA supported. HSPA+ If MIMO is supported, Transmit Diversity or Spatial Multiplexing can be selected in the ”MIMO Support” tab on Cells table.
Note : If the network needs to use MIMO, not only select the Transmit Diversity or Spatial Multiplexing on Cells table, but also select 2 ports in the «Number of Transmission Antenna Port on Transmitters table.
If HSDPA or HSPA has been chosen, define the HSDPA parameters: HSDPA Dynamic Power Allocation, Available HSDPA Power (dBm), Power Headroom (dB), HS-SCCH Dynamic Power Allocation, HS-SCCH Power (dBm), Number of HS-SCCH Channels, Min number of HS-PDSCH codes, Max number of HS-PDSCH codes, Max number of HSDPA users, Number of HSDPA users, and HSDPA scheduler algorithm, as shown in the following figure.
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2)
Right click the “Network Settings” folder on “Parameters” window select properties. In the “Global Parameters” tab define the methods for the calculation of Nt and CQI.
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Nt: You can select "Total noise" and Atoll will calculate Nt as the noise generated by all transmitters plus thermal noise or you can select "Without useful signal" and Atoll will calculate Nt as the total noise less the signal of thestudied cell. CQI: You can select “Based on CPICH quality” and Atoll will measure the CQI based on the pilot Ec⁄Nt or you can select “Based on HS-PDSCH quality” and Atoll will measure the CQI based on the HS-PDSCH Ec⁄Nt. Depending on the option selected, you will have to define either a CQI=f(CPICH Ec/Nt) graph, or a CQI=f(HS-PDSCH Ec/Nt) graph in the Properties dialogue of the terminal equipment. The calculated CQI will be used to determine the best bearer. 3)
Define HSDPA Ec/Nt threshold Open the “50 km/h” mobility in the “Traffic Parameters” folder on the “Parameters” window and define the HS-SCCH threshold, as shown in the following figure.
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4)
Define HSDPA Service Double click on the HSDPA service in the “Traffic Parameters” folder on the “Parameters” window and define the HSDPA parameters and the associated R99 radio bearer, as shown in the following figure.
5)
Define HSDPA Terminal Double click on the “HSDPA” terminal in the “Traffic Parameters” folder on the “Parameters” window and define the HSDPA terminal parameters. In the HSPA tab, define the UE Category (Atoll supports 28 categories) and the Number of Reception
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Antenna Ports to support MIMO or not.
Double click “HSDPA UE Categories” in the “Network Settings -> UE Categories” on “Parameters” window to define HSDPA terminal UE category and “Number of Reception Antenna Ports”, as shown in the following figure.
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6)
Define HSDPA Bearer Table and MIMO Table Double click “HSDPA Radio Bearers” in the “Network Settings -> Radio Bearers” on “Parameters” window to define HSDPA Bearers (Atoll supports 37 bearers). For each HSDPA bearer, to define Transport Block Size, Number of Used HS-PDSCH Channels, RLC Peak Rate and Modulation (Atoll supports QPSK, 16QAM and 64QAM). As shown in the following figure.
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If network supports MIMO, double click “Standard” in the “Network Settings -> Reception Equipment” on “Parameters” window to define MIMO table. As shown in the following figure.
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defined for each clutter class. As shown in the following figure.
7) HSDPA Prediction Right click on the Predictions folder and select New. In the appeared dialogue select “HSDPA Quality and Throughput Analysis”, as shown in the following figure.
In the Condition tab define the HSPDA terminal, the HSDPA service and select a simulation for the cell load conditions, as shown in the following figure.
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In the Display tab, select “Value Intervals” for the display type and for example select “RLC Peak Rate” among the 15 supported predictions.
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Atoll will display the calculated “HSDPA RLC Peak Rate” in the map window, as shown in the following figure.
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3.9.4 HSUPA Atoll supports HSUPA (High Speed Uplink Packet Access) since the version 2.6. The following paragraph introduces HSUPA parameters and predictions. 1) Define Cells Table Open the cell properties window of a transmitter and define the type of HSPA support (select HSPA or HSPA+), the DL HSUPA power, the max number of HSUPA users, UL load factor due to HSUPA and the number of HSUPA users, as shown in the following figure.
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2) Define HSUPA Service Double click on the “HSUPA” service in the “Traffic Parameters” folder on the “Parameters” window and define the HSUPA parameters and the associated R99 radio bearer, as shown in the following figure.
3) Define HSUPA Terminal Double click on the “HSUPA terminal” in the “Traffic Parameters” folder on the “Parameters” window and define the HSUPA parameters. In the UMTS tab, define the UE Category (Atoll supports 7 categories).
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Double click “HSUPA UE Categories” in the “Network Settings -> UE Categories” on the “Parameters” window to define “HSUPA User Categories”. In the appeared dialogue, define for each HSUPA category, the max number of E-DPDCH, Min spreading factor, Max block size for TTI 2ms and 10ms, the highest modulation and whether TTI 2ms is supported. As shown in the following figure.
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4) Define HSUPA Bearer Table Double click “HSUPA Radio Bearers” in the “Network Settings -> Radio Bearers” on the “Parameters” window to define HSUPA Bearers (Atoll supports 33 bearers). For each HSUPA bearer, define TTI Duration, Transport Block Size, Number of E-DPDCH Channels, Min Spreading Factor, RLC Peak Rate and Modulation (Atoll supports QPSK and 16QAM). As shown in the following figure.
5) HSUPA Prediction Right click on the Predictions folder and select New. In the appeared dialogue select “HSUPA Quality and Throughput Analysis”, as shown in the following figure.
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In the Condition tab define the HSUPA terminal, the HSUPA service and select a simulation group for the cell load conditions, as shown in the following figure. On HSUPA Resources, Atoll can calculate the HSUPA coverage prediction in one of two ways: - For a single user: After allocating capacity to all R99 users, the entire remaining load will be allocated to a single HSUPA bearer user. - Shared by HSUPA users defined or calculated per cell: After allocating capacity to all R99 users, the remaining load of the cell will be shared equally between all the HSUPA bearer users. When the coverage prediction is not based on a simulation, the number of HSUPA bearer users is taken from the cell properties. The displayed results of the coverage prediction will be for one user.
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In the Display tab, select “Value Intervals” for the display type and for example select “RLC Peak Rate” among the 8 supported predictions.
Atoll will display the calculated “HSUPA RLC Peak Rate” in the map window, as shown in © Forsk 2010
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the following figure.
3.9.5 Dual-Cell HSDPA Modeling Atoll supports Dual-Cell HSDPA since the version 3.1. Transmitters can be defined to support dual-cell HSDPA. HSDPA scheduling is carried out per transmitter. The capacities and resources of two HSDPA cells are combined in order to serve HSDPA users. Dual-cell HSDPA users can connect to two cells simultaneously on the HS-DSCH. Coverage predictions and Monte Carlo simulations provide results for dual-cell HSDPA. 1) Select to support Deal-Cell on Transmitters table Select “Dual-Cell” on “Mutil-cell mode” tab, and select one of algorithm methods on “Algorithm” tab (Atoll supports Max C/I, Round Robin and Proportional Fair). The two cells on the same transmitter must support HSDPA.
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Note: The MUG graph is only available if you have set the peak HSDPA throughput option in the atoll.ini file. For more information, see the Administrator Manual. 2) Define Dual-Cell UE Category Define the HSDPA terminal to support Dual-Cell UE category, and define which UE category supports Dual-Cell on HSDPA UE Categories table (Atoll supports 8 UE categories).
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3)
After simulation, select “Detail Display” by clicking the “Action” button on the “Moblies”
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tab, then you can see one HSDPA user is connecting two HSDPA cells at the same time.
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3.10 Neighbours Allocation Atoll provides both manual and automatic allocation of neighbours.
3.10.1 Automatic allocation 1)
Right click on “Transmitters” in the “Network” window and select “Neighbours-> Intra-technology-> Automatic Allocation”.
2)
In the appeared dialog box, define neighbor allocation conditions, click “Calculate” to start allocation.
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3)
After calculation, the allocation result will display on the appeared dialog box. Click “commit” button to commit the result to the Cells table.
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4)
Click on the toolbar icon
, and then select one transmitter on the Map Window.
The neighbour relations will be displayed graphically, as shown in the following figure.
Select the best server plot (Coverage by transmitter) and the neighbour areas are automatically shown in the Map Window.
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Note: The automatic neighbour allocation can allocate neighbours to multi-cell transmitters. When there are more than one cell on the transmitter, clicking the transmitter in the map window opens a context menu which enables to select the desired cell. 5) Display all neighbor cells. Right click on “Transmitters” in the “Network” window and select “Neighbours-> Intra-technology-> Open Table”.
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3.11 Scrambling Codes Allocation Atoll provides the Automatic Scrambling Code Allocation function. 1) Define Domains for the Scrambling Codes. Double click “Domains” on the “Network Settings->Scrambling Codes” folder in the “Parameters” window. In the appeared “Domains” dialogue, Scrambling Codes Domains can be defined.
2)
In the “Domain” properties dialog box, define for each Scrambling Code Group “Min”, “Max” and “Step”.
3)
In the “Cells” table define the “Scrambling code domain” for each cell.
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4)
Right click on the “Transmitters” folder and select “Primary Scrambling Codes->Automatic Allocation”, as shown in the following figure.
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5)
In the “Primary Scrambling Codes” dialog box define the automatic allocation properties parameters, as the “Default Reuse Distance” and the allocation strategy.
6)
After defining the automatic allocation parameters, click on the “Calculate” button. The result will be displayed in the same dialogue, as seen in the following figure.
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7)
According to the results, the user may choose to commit the automatic Scrambling Code allocation list by clicking on the “Commit” button.
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8)
Preview the automatic allocation result on the Distribution Histogram. Right click on the “Transmitters” folder and select “Primary Scrambling Codes-> Code Distribution”, as shown in the following figure.
9)
After allocation, verify whether the allocated scrambling codes respect the specified constraints by performing an audit of the plan. Right click on the “Transmitters” folder and select “Primary Scrambling Codes-> Audit…”, the result will be exported to a .txt file.
10) Scrambling Codes Search Tool. Click “Edit” on the menu bar, then select “Find on © Forsk 2010
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Map->Scrambling Code”, as shown in the following figure.
Select what you what you want to search for: - Scrambling code: If you want to find a scrambling code, select Scrambling code and select it from the list. - SC Group: If you want to find a scrambling code group, select SC group and select it from the list. For example, we need to search 8 scrambling code on the map. Input 8 on “Scrambling code”, click the “Search” button, the transmitters with cells matching 8 are displayed in red.
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3.12 Other features 3.12.1 User configuration function The user configuration function allows the user to save the configuration of “Geographic Data Set”, “Computation and Focus Zones”, “Folder Configuration”, “Automatic Neighbour Allocation Parameters” and “Prediction List” into external file. This configuration file can be used in the same project or other similar Atoll project in order to avoid redundant settings. 1)
Save the user configuration: Select “Tools->User Configuration->Save”.
2)
Select the information to be exported and click on the “OK” button. The project configuration will be saved in a “.cfg” file.
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3)
Import a user configuration: The configuration files are stored in the folder “Reference data\ User configuration” from the CDROM. Select “Tools->User Configuration->Load”, as shown in the following figure.
4)
In the “Open” dialog box select a “.cfg” file located in the CDROM, for example the “User_Configuration.cfg”. This configuration file contains all prediction studies produced in the Demo project.
5)
In the appeared dialog box, select the information to be imported and click on the “OK” button. The user configuration is loaded into your current document.
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3.12.2 Store methods for path loss matrices If the project is not saved, Atoll calculates the pathloss matrices and save them in the RAM memory. When the project is saved and the “embedded” function has been chosen, the path loss matrices are stored in the ATL file. This can probably impact the size of the ATL file (according to the calculation resolution and the size of the computation zone) and the project will need longer time for opening and saving. The user may choose to store the propagation matrices in an external folder, to reduce the project document size. Moreover this folder can also be shared with other users. Double clicking on the “Predictions” folder, opens the “Prediction properties” dialog box. Click on the right side of the “Private directory” field on the
button and select a
directory.
The path loss matrices will be stored in the selected directory with the following name “project name.losses”. Note: when the project document is moved, the corresponding .losses folder has to be moved in the same directory. Otherwise Atoll will recalculate the path loss matrices.
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4 Tips and tricks How to import geo data easily? Drag and drop feature is available for any geo data object to import in ATOLL. To do this, just select the accurate geo data file in your file explorer and drag it to ATOLL. The format will be automatically detected by the tool. This can also be made on PlaNET® index data file. How to change globally a value for all the transmitters? The right way to make global changes is to open the Transmitter table, modify the contents in the first cell, select all the columns and then use the fill-down feature, available in the Edit menu or with the shortcut ctrlD. To select all the cells of the column, the easiest way is to select the first one, then select the last one holding the Shift button. How to find easily a site on the map? A search bar is available to find the location of sites on the map. The Search bar can be opened or closed by selecting the Search bar command in the View menu. In the Search bar, type the first characters of the site name in the Find site box. ATOLL displays a scrolling list containing all the sites, which the name begins with this string of characters. Then, either select the site in the list, or go on typing the site name to reduce the number of sites in the list. After choosing the site in the list, ATOLL automatically centers the map on the selected site. As in advanced filters, it is possible to use the “contains” (*string*) and “begins with” (string*) criteria to search for sites which name contains or begins with the given string. How to be automatically placed in the Find site box? Use the F3 shortcut to be automatically placed in the Find site box of the Search bar. How to delete all sites and their transmitters in one shot (or a set of sites and transmitters)? The right way to delete all sites and their transmitters is to open the Sites table, select the first one and the last one holding the Shift button and use Suppr keyboard button. It is recommended to close the Sites and Transmitters folders before deleting a large number of sites and transmitters; otherwise the refresh of the explorer could take a long time. How to access the properties of any object or group of objects? In ATOLL, the properties of any object (geo data, sites, transmitters, measurements, etc…) can be accessed from the associated context menu. This is reachable by right-clicking on the considered object/group and choosing the properties command. How to filter data rapidly?
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The easiest way is to perform directly filters within the tables (popup menu available by right-clicking in the table). OR and AND criteria can be easily handled: Ö Selecting cells in several columns and the option “Filtering by selection” in the popup menu performs a AND filtering criterion Ö Selecting cells in several rows and the option “Filtering by selection” in the popup menu performs a OR filtering criterion To check which kind of dynamic criterion has been used by ATOLL, you can open Transmitters/Properties/General tab and look at the advanced filter. How to work only on “live” sites? Let's assume there is a flag (user field) in Site table dedicated to the status of the site (“live”, “on-built”, “planned”,…). Filtering sites directly in the table with the popup menu (“Filtering by selection”) allows to keep just “live” sites. Filters on site are automatically performed on transmitters (“As site folder” is the default configuration for Transmitter folder). Further simulations or predictions will be achieved only on “live” sites. How to use wildcard characters to filter text-format fields? Wildcard characters such as “*” can be used when defining advanced filter criteria on fields with text format. Entering *string* enables you to filter objects which the chosen field contains the string of characters. Entering string* enables you filter objects which the chosen field begins with the string of characters. Example: How to display transmitters which are allocated a channel XX? In the Transmitter table structure, there is a field “Channels” which contains a flat list of the channels allocated to the transmitter. It is possible to define an advanced filter as follows: Use the Advanced filter tab of the Filter dialog (Transmitters/Properties.../General/Filter/Advanced filter): Columns: select “Channels” in the list Criteria: =* XX * (which means CONTAINS) Only the transmitters with the channel XX are displayed. The same filter can be managed at the level of any study by transmitter. How to change globally the names of all the sites? There is a Find/Replace feature in the Edit menu available when a table is opened. To prefix all the sites with your name for example, select the first cell of the “name” column in the Site table and use the Edit/Replace feature. How to find easily an object by its name in a folder? Open the folder and type the first letters of the object's name.
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How to open or close rapidly a folder? Shortcuts, available in standard Windows applications are available within ATOLL to open or close the selected folder with shortcuts. “Right arrow” and “Left arrow” respectively open and close the selected folder just like “+” and “-” on the numeric keyboard. “*” on the numeric keyboard opens all the subfolders of the selected folder. [Alt F4] may be used to quit Atoll rapidly when no modifications were made. If there are modifications, you will be asked to save them anyway. How to find easily an object in a table? A Find feature is available in the Edit menu when a table is opened. To find an object in a table, open the table and use the Find feature. How to find easily an object on the map? The “Centre map” feature allows the user to find on the map any object located into a folder (site, transmitter, etc…). When choosing this command in the associated context menu, the considered object is automatically displayed in the centre of the current workspace. How to customize the columns displayed in a table? When a table is opened, you may use the “Display columns…” feature available in the Format menu to choose which columns you want to keep within the table. This is useful to customize reports on transmitters or import Excel-format data by matching columns on both sides and copying-pasting into the table. How to customize the table style? When a table is opened, you may use features available in the Format menu in order to customize the table style. Ö To change the title style, choose the Format title feature. Ö To modify the column style, select a column and use the Format columns feature. You may also use the Align Left, Centre, Align Right, Bold and Italic features. How to change globally display properties of objects (sites, vectors, measurement points…)? In the Display tab, select the whole table describing the display configuration and click on the Modify button. In the Display window, you can choose a unique symbol for all the objects. How to predict signal level (received from a transmitter) on a road? The easiest way consists in using measurement features. Let’s assume you have previously imported a vector file. The procedure is divided into three steps: Ö Right click on a linear object and select the Element properties feature. In the Geometry tab, copy the list of coordinates (ctrl-C). Ö Right click on the Measurement folder and select the New feature. Give a name to © Forsk 2010
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Ö
the path, specify measurement unit, transmitter and receiver properties and finally click on the Paste button. Then, click on OK to validate the path creation. Open the path properties window. Choose a propagation model, click on Actions and choose Calculate predictions. The signal level calculated on the path is displayed in a related table (P(dBm) column). You may use the Measurements window to visualize the signal level received from the selected transmitter on the path.
How to work on a set of sites selected by a polygon? Let's assume polygons are available within ATOLL. Right-clicking on the polygon, you can use it as the working zone or as a filtering polygon. Sites, transmitters and future calculations are filtered with this polygon. You can save the polygon filter as a configuration of the Site folder, and repeat this operation with as many polygons as you wish. Then, directly right-clicking on the Site folder, you will get all the available configurations for the folder and be able to rapidly switch from one to another. Configurations are saved in the ATL file but possibly also in database. How to obtain a link budget? Right-click anywhere in the Profile window opens a context menu. This menu allows you to change receiver properties, gives the choice between signal level, pathloss or total losses display, and offers a link budget. If the propagation model used by the selected transmitter is a Standard Propagation Model, there is an additional feature, useful for validation, called “Model details” providing detailed results along the profile. How is it possible to display city points and their names on the map? With a vector format providing for each point an attribute containing the name. Import the vector file within ATOLL and choose the field “name” as label (you can use any field or list of fields in the same way). Where can you define the default server for distributed computing? In the Atoll.ini file: [RemoteCalculation] Servers=Workstation_1; Workstation_2 If the list is empty, computations are run locally. You can display different areas or view different scales of the same document at the same time thanks to the “Window->New” command. When selecting this command, a new Map Window is created with exactly the same view as the current one. You can then modify area and scale of both windows independently. For instance, with this feature you can zoom in very close on two faraway sites without having to display everything between them. You can also display an overview of the whole network and a small part of it with two different scales. Note: Items displayed in all map views depend on the explorer settings and are the same in all windows, except if you have different scales for the windows and some visibility settings according to scales.
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