>> WCDMA Getting Started Tutorial for Mentum Planet 5.3.1
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WCDMA Getting Started Tutorial The Getting Started Tutorial Tutorial focuses on WCDMA and is intended to provide provide you with some understanding understanding of the basic concepts of network modeling using Mentum Mentum Planet. It is assumed that you are using the the standard Windows Windows desktop, and that you know how to access ToolTips ToolTips and shortcut shortcut menus, menus, move and copy objects, select multiple multiple objects using the Shift Shift or Ctrl key, resize dialog boxes, expand and collapse collapse folder trees. No prior knowledge knowledge of Mentum Planet Planet is required required to complete the tutorial. tutorial. Ensure you have installed Mentum Planet on your computer and set aside approximately two hours to complete the entire tutorial. NOTE: If you have any comments comments on the tutorial, tutorial, please send them them to
[email protected]..
[email protected]
TIP: To view the Mentum Planet Planet help, from any dialog box, box, press F1. This tutorial covers:
Learning Mentum Planet for WCDMA
5
Defining project settings
7
Customizing your workspace
9
Generating and viewing predictions
12
Identifying sect sectors using flags
15
Assigning a propaga propagation model
18
Importing network data
20
Crea Cre ating a traf f f ic ic map
22
Editing subs subscrib cribers
24
Generating and viewing a network analysis
26
Identify Identifyin ing g sectors sectors causi causing ng CPICH pollution
29
4
Generating a Monte Carlo simulation
30
Generating layer statistics
32
Creating and applying neighbor plans
34
Creating an Interference Matrix
36
Planning scrambling codes
38
Placing sites automatically
41
O ptimiz ing a single site
43
5
Learning Mentum Planet for WCDMA Using the tutorials, you can quickly and easily familiarize yourself with Mentum Planet. The Mentum Planet interface has been designed to provide easy acces s to the main workflows you follow as you design and optimize a wireless network. It consists of the following elements: n
n
n
Project Explorer—provides quick and easy access to Mentum Planet functionality from a central location. By default, it is docked to the left but you can customize the location of the Project Explorer to suit your needs. Mentum Planet menus—provide an alternate way of accessing Mentum Planet functionality. Toolbars—provide an alternate way of accessing Mentum Planet functionality. Commonly used toolbars include the Main toolbar, the Site toolbar, the Analysis toolbar, and the Network toolbar.
A Mentum Planet project contains all of the information pertaining to a particular wireless network. It consists of a collection of files and folders. Each project has a project (.planet) file that defines the project structure and references the associated data (planet.dat) file.
Downloading the tutorial project The project you will be working with has been pre-configured to illustrate the steps in the tutorial workflow. You can, however, use it to further explore the features of Mentum Planet. CAUTION: In order to complete the tutorial, you require a valid WCDMA license. If you do not have one, contact Customer Care to obtain a temporary license. In this lesson, you will download and open the project. You need a valid product ID number in order to access the Customer Care section of the Mentum website.
6
To download and unzip the tutorial project 1
Use your Product ID to log in to the Customer Care section of the web site at http://www.mentum.com/index.php?page=customercare&hl=en_US.
2
From the left-hand menu, choose Product Downloads.
3
In the Password box next to the version of Mentum Planet you use, type the password supplied by Customer Care, and click Submit.
4
Scroll down to the Tutorial section of the download page, right-click the file in the Single column and save the .zip file to a location on your computer.
5
Unzip the files. A WCDMA folder is created containing all project files.
6
Double-click the WCDMA.planet file to open the project in Mentum Planet. The project opens in the Map window.
7
Defining project settings Project settings encompass all the parameters that determine how a project is displayed and what it contains. They define the geodata to be used, the coordinate system to adhere to as well as the workspace associated with it. It is the MapInfo workspace (.wor) file that stores the list of all tables, windows, and settings you are using. Using a workspace and the autosave feature, you can ensure a project looks exactly the same every time you open it. Workspaces enable you to work more efficiently and eliminate the need to open map layers individually each time you view a project. You can also define custom data definitions that can be used to add custom attributes to project entities such as base stations, sites, sectors, repeaters, and antennas. In this lesson, you will browse project settings and associate a workspace with the project.
To associate a workspace with the project 1
2
With the WCDMA tutorial project open inMentum Planet, do one of the following: n
Choose Edit
Project Settings.
n
Click the Project Settings button
on the Network toolbar.
On the General tab, in the Workspace section, click Browse, navigate to the ProjectOpening.wor file saved in the WCDMA folder, and click Open. The Workspace label is now blue to indicate that a change has been made but not applied to the project.
3
Enable the Workspace Autosave check box. Using the workspace autosave feature ensures that the next time the project is opened, it will look exactly as it did when it was last closed.
4
Click the Coordinate System tab. This is where you can change the coordinate system used for site data.
8
5
To define a custom attribute that will enable you to specify the street address for each site, do the following: n
n
n
n
Click the Custom Data tab. In the tree view, choose Site and click the Text tab. Click Add. Click in the Name field and type Street Address .
6 Click OK. 7 Choose File
Close Project to close the project or press CTRL+F3.
8
In the Planet confirmation dialog box, click Yes.
9
When prompted to save your changes, click Yes.
9
Customizing your workspace You can change how your workspace is organized in order to better visualize how the network performs. You can also define preferences that affect how your workspace functions. These settings are preserved between Mentum Planet sessions. In this lesson, you will change how the heights and clutter file are displayed and open a vector road file. You will also specify user preferences. TIP: To dock and undock toolbars, choose GIS
Options
Toolbars.
To customize your workspace 1
To open the project, in Mentum Planet, choose File Projects WCDMA Tutorial.
Recent
The entire project path is displayed in the information bar at the bottom of the Mentum Planet window.
2
On the Main toolbar, click the Layer Control button.
3
In the Layer Control dialog box, select the Ottawa_DEM30m file.
4
Click the Layer Properties
5
In the Layer Properties dialog box, in the Display Mode section, enable the Style Override check box.
6
Click the style override
7
In the Adjust Image Styles dialog box, in the Conversions section, choose Grayscale and click OK.
8
In the Layer Properties dialog box, click OK.
9
In the Layer Control dialog box, select the Ottawa_17Class_30m file and click the Layer Properties button.
button.
button.
10
10 In the Enhanced Rendering section, type a translucency value of 60% and click OK.
11 In the Layer Control dialog box, select the clutter file and drag it above the heights file.
12 Click OK. The clutter file displays on top of the heights file.
13 In the Project Data category, within the Geodata folder, right-click the Custom folder and choose Add.
14 Browse to the Custom Data folder within the project Geodata folder and select the Ottawa_30m_Clutter_w_HWY&Roads.tab file.
15 Click Open. The file is added to the Custom folder in the Project Explorer.
16 Right-click the Ottawa_30m_Clutter_w_HWY&Roads.tab file and choose View.
17 On the Main toolbar, click the Zoom In
button to better view sites
and highways.
18 To remove the vector file, right-click the Ottawa_30m_Clutter_w_ HWY&Roads.tab file and choose View again. The checkmark next to the View command is no longer displayed to indicate that the highways are no longer shown in the Map window.
To define user preferences 1 Choose Edit 2
Preferences.
In the User Preferences dialog box, in the tree view, choose Project Explorer.
11
3
In the Performance section, enable the Show Windows category check box if it is not already selected.
4
In the Zoom Automatically section, enable the On Viewed Site Selection check box if it is not already selected.
5 Click OK. 6 Do one of the following: n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
12
Generating and viewing predictions Predictions use a propagation model, terrain and clutter information, and general sector settings including the power, antenna, and azimuth to predict the signal strength and path loss of a sector at any location where the signal exceeds the defined minimum level. Path loss and signal strength predictions are used in network analyses to determine coverage and other metrics. In this lesson, you will generate and view predictions for one site.
To generate predictions 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, from the Category list, choose Sites.
3
Expand the Sites node.
4
Right-click the C2750 site and choose Generate Predictions.
5
In the Prediction Generator, click Generate.
6
When prediction generation is complete, click Close.
To view sector predictions 1
In the Project Explorer, in the Sites category, expand the Groups node and the Sharednode, and then right-click the Downtown_UMTS node and choose View. Local groups are saved on your workstation and cannot be shared using Data Manager while Shared groups are stored in Data Manager and can be shared with other users.
2
Expand the Downtown_UMTS node. The C2750 site is part of the Downtown_UMTS group.
13
3
Expand the C2750 site, right-click the WCDMA base station, and choose View Sector Predictions Modeled CPICH. You could also view the sector prediction by expanding the Sites node and then expanding the C2750 site, and right-clicking the WCDMA base station. The prediction layer shows the coverage area of each sector's CPICH.
4 Choose View
Grid Legend.
5
In the Grid Legend dialog box, from the Grids list at the bottom of the dialog box, choose CBs_C2750_4_5_6_CPICH.grd.
6
Review the legend and close the window.
7
On the Grid Analysis toolbar, click the Grid Info click in the Map window.
button and then
The Grid Info dialog box opens. You can resize columns by clicking the heading divider.
8
In the Map window, click anywhere on the displayed prediction layer to view prediction values.
9 When you have finished, close the Grid Info dialog box.
To remove predictions from the Map window TIP: You can remove prediction layers from the Map window using various methods. You will use the View Predictions dialog box in this exercise but you can also use the Close Table command from the GIS menu or the Close command available when you right-click a layer in the Windows category.
1
To remove the prediction displayed, choose View
2
In the View Predictions dialog box, click Close All Tables, and click Close.
3
Do one of the following:
Predictions.
14
n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
15
Identifying sectors using flags Flags are properties that you can use to identify sectors as having certain characteristics (conditions). You can create multiple flags, and each flag can have multiple conditions, but you can assign only one condition per flag to a sector. The conditions of a flag should be a set of related but mutually exclusive values (e.g., you could have a flag called "Status" with conditions called "On-Air", "Under Construction", "Offline"). In this lesson, you will use the Tabular Editor to associate the On_Air flag to the Downtown group of sectors.
To identify sectors using flags 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, in the Sites category, expand the Sites node.
3
Double-click the C2750 site.
4
In the tree view, choose sector 4.
5
On the General tab, in the Flags section, choose the On_Air condition for the Status flag.
6
Repeat Step 4 for sectors 5 and 6.
7 Click OK. When you click OK, your changes are applied and the dialog box is closed. When you click Apply, your changes are applied but the dialog box remains open so that you can make further changes. All sectors at the site are now tagged as being On_Air. To change the status of all the sites in the Downtown group in a similar fashion would be very time consuming. Using the Tabular Editor, you can apply flags and conditions quickly to a group of sites.
8
Expand the Groups node, and then expand the Shared node.
16
The numbers displayed after the Downtown_UMTS group name (13/13/39/0) indicate the number of sites, base stations, sectors, and repeaters in the group.
9
Right-click the Downtown_UMTS group and choose Tabular Editor.
10 In the Tabular Editor, click the Sectors tab. Notice that the rows for site C2750 in the Flag: Status column are already tagged as On_Air.
11 In the Flag: Status column, click in the first field and from the list choose On_Air.
12 On the toolbar, click the Copy To Clipboard button
.
13 Click the Flag: Status column heading to select all rows. 14 Click the Paste From Clipboard button
.
The On_Air flag is copied to all sectors in the Downtown group.
15 Click OK to apply your changes. All sites in the Downtown_UMTS group are now tagged as being on air.
16 In the Project Explorer, in the Sites category, expand the Flags node.
17 Expand the Status node and enable the On_Air check box. 18 To view all sites tagged as on air, right-click the Flags node and choose View. All sites that are on air are displayed in the Map window.
19 Do one of the following: n
If you want to proceed to the next lesson, leave the Map window open.
17
n
If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
18
Assigning a propagation model In order to model a network that is as close to the real-world network as possible, you need to calibrate the propagation model using survey measurements. Once you have calibrated the model, you can associate the model to other sites that share the same type of environment, provided that the model is not overly dependent on calibrations (empirical models generally rely heavily on calibrations). In this lesson, you will assign a tuned Planet General Model to all sites in the Downtown_UMTS group.
To assign the tuned model 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, in the Sites category, expand the Groups node, and expand the Shared node.
3
Right-click the Downtown_UMTS group and open the Tabular Editor.
4
In the Tabular Editor, click the Sectors tab.
5
In the Propagation Model column, change the value for all rows from default_PlanetGeneralModel.pmf to Urban_PGM_Ottawa_1900.pmf.
6 Click OK to apply your changes. 7
To see how tuning the model affects predictions, right-click the C2750 site in the Downtown_UMTS group and generate predictions.
8
View the CPICH prediction in the Map window.
9
Remove the prediction from the Map window.
10
Do one of the following: n
If you want to proceed to the next lesson, leave the Map window open.
19
n
If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
20
Importing network data Network data is data collected from wireless network switching equipment. It contains information about network configuration and performance. You use the Network Data Import Wizard to bind network data to Mentum Planet data. The bound network data can then be used in Mentum Planet in traffic maps, interference matrices, neighbor plans, frequency planning, and for display purposes. In this lesson, you will import and bind network data that you will later use to create a traffic map.
To import network data 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, in the Operational Data category, right-click the Network Data node and choose New. The Network Data Import Wizard opens.
3
Read the introduction and click Next.
4
Choose the Microsoft Excel option, browse to the Attachments\Shared folder within the tutorial dataset, select the Network_data_umts.xls file, and then click Open.
5
In the Wizard, click Next.
6
To bind the network data to the Mentum Planet project, do the following: n
n
n
Choose the Bind To SiteID/Sector ID option In the Site ID column, from the list, choose Site ID. The indicator turns green to confirm that your selection is valid. In the Sector ID column, from the list, choose Sector ID. Leave the Traffic column unbound.
7 Click Finish.
21
The Report Preview dialog box opens where you can review traffic data.
8
Click the Traffic heading to select the column.
9
Click the Generate Sector Display Scheme
button.
10 In the New Sector Display Scheme dialog box, type TrafficCounts and click OK.
11 In the Sector Display Scheme dialog box, click the Color tab. 12 Choose the Based On Property option and, from the associated list, choose Traffic.
13 Click Add and, in the Add Value dialog box, type 4 and click OK. 14 Click the color swatch next to a value so that each value uses a unique color.
15 Click Apply to display sector symbols using color to identify traffic values.
16 Click OK and then, in the Report Preview dialog box, click Close. 17 To remove the sector display scheme, in the Project Explorer category, in the Sites category, right-click the Sites node and choose Sector Display Scheme Apply.
18 In the Select Scheme dialog box, choose None and click Apply. 19 Do one of the following: n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
22
Creating a traffic map Traffic maps provide data about the geographical distribution of subscriber traffic in a network and are key to creating an accurate model of network performance. By using well-crafted traffic maps, you ensure that with your network design, service is available in the areas where it is most needed. You can base the traffic map on various data sources including regions, vectors, classified grid, or network data. And, in order to ensure the traffic map is as realistic as possible, you can define a weighting value to the input data that represents how much traffic to model. In this lesson, you will create a traffic map using the imported network data.
To create a traffic map 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, in the Project Data category, right-click the Traffic Maps node and choose New.
3
In the Name box, type Ott_Traffic .
4
In the Data Source section, choose the Network Data option.
5
In the Weighting section, choose None.
6
In the Unit section, change the Input Data Unit to Subscribers and the Output Data Unit to Subscribers/km2.
7 Click Next. The Traffic Data page displays with the Network Data selections already made.
8
In the Traffic Spreading Algorithm section, choose the Sector Service Probabilities option.
9 Click Next.
23
10 On the Traffic Spreading Algorithm page, in the Selection Options section, choose Group Selection and ensure the Downtown_UMTS group is selected.
11 Click Finish. 12 When traffic map generation is complete, click Close. The new traffic map is added beneath the Traffic Maps node.
13 To display the traffic map, in the Project Data category, expand the Traffic Maps node and double-click the Ott_Traffic file. When you double-click an item in the Project Explorer, the default action is carried out. A default action is displayed in bold on the Project Explorer shortcut menu. In this case, the default action is View and so the traffic map displays in the Map window. Use the Grid Legend command from the View menu to display the map legend.
14 Choose GIS
Close Table to remove the traffic map layer from the
Map window.
15 Do one of the following: n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
24
Editing subscribers The characteristics of subscribers are defined using the nodes in the Subscriber Settings dialog box. The nodes within the Subscriber Settings dialog box represent building blocks for subscriber types: Equipment Types, Services, and Subscriber Types. You can create a diverse mix of subscribers by defining different services, quality types, and user equipment types and assigning them to subscriber types. Subscriber types are used with Monte Carlo simulations. Nominal analyses only require the definition of equipment types. In this lesson, you will modify subscriber settings to use the traffic map you created in the previous lesson.
To edit subscribers 1
Open the WCDMA tutorial project if it is not already open.
2
InMentum Planet, do one of the following: n
Choose Edit
Subscriber Settings.
n
Click the Subscriber Settings button
on the toolbar.
3
In the Subscriber Settings dialog box, expand the Equipment Types node, and choose WCDMA - UE.
4
Click the Hardware tab and, in the Maximum Transmit Power box, type 22 dBm.
5
Expand the Subscriber Types node and choose WCDMA Subscriber Type_1.
6
Click the Configuration tab and from the Traffic Map list, choose Ott_ Traffic.
7 Click OK. 8
Do one of the following:
25
n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
26
Generating and viewing a network analysis In Mentum Planet, you can generate an analysis with nothing more than the equipment type defined in the subscriber settings. This decreases the time required to prepare for network analysis and results in less time being required to generate the analysis layers; however, this type of analysis does not generate detailed subscriber information. The analysis runs only once and generates analysis layers automatically. In this lesson, you will learn how to define default layer settings, generate three layers, and view layers side by side.
To generate a network analysis 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, in the Network Analyses category, rightclick the WCDMA Analyses node, and choose Default Layers. By defining default layers, you can save time if you always generate the same layers.
3
In the WCDMA Analysis Layers dialog box, click the top-level node to clear all check boxes.
4
Expand the Per-Carrier node, enable the following check boxes and click OK. n
CPICH Best Server
n
CPICH Composite Best Server
n
CPICH Number of Polluters
5
Right-click the WCDMA Analyses node and choose New.
6
In the Name box, type Ott and click Next.
7
On the Sector Selection page, choose the Group Selection option and select the Downtown_UMTS (Shared) group.
27
8 Click Next and, on the following pages of the wizard, accept the default settings until you come to the Analysis page.
9
At the bottom of the page, enable the Generate CPICH Pollution Index Layer check box and click Next.
10 In the Analysis Area section, choose the Use An Area Grid option and, from the list, choose Downtown. Using an area grid you can focus an analysis on a specific area. In this way, you can reduce the time required to generate outputs.
11 Click Next until the Final Step page of the Wizard displays and ensure the Save Settings And Generate Output option is selected.
12 Click Finish. 13 When layer generation is complete, click Close.
To view a network analysis 1
If the MapInfo Sync Windows toolbar is not visible, choose GIS Tools Tool Manager, and enable the Sync Windows check boxes.
2
On the Sync Windows toolbar, do the following:
n
Click the Clone Map Window
n
Click the Tile Windows button.
n
button.
Click the Sync All Map Windows button and , in the Synchronize Map Windows dialog box, enable the Always Synchronize Map Windows check box and click OK.
For more information about the Sync Windows feature, see the MapInfo Professional online Help or PDFs. MapInfo Help is not part of the Mentum Planet Help and must be searched separately.
3
In the Project Explorer, in the Network Analysis category, expand the WCDMA Analyses node, expand the Ott node until it is fully
28
expanded, and right-click the CPICH - Best Server layer and choose View.
4
Click the second Map window to make it active and view the CPICH Number of Polluters layer.
5
On the Main toolbar, use any of the following tools to examine the layers:
n
Zoom In
n
Zoom Out
n
Grabber
For more information about these tools, choose Help MapInfo.
6
Help Topics
After you have examined both layers, in the Project Explorer, in the Network Analyses category, right-click the CPICH Best Server layer and choose Close. The CPICH - Number of Polluters layer should still be displayed.
7
Do one of the following: n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
29
Identifying sectors causing CPICH pollution Using the CPICH Pollution Inspector, you can identify polluting sectors at specific locations, modify the appropriate sector settings, and then view the effect of your changes. The level of CPICH signal pollution is analyzed by comparing the powers of the CPICH channels with the power of the best serving CPICH channel, taking into account the active set (i.e., the set of CPICH signals currently participating in the call) and the CPICH pollution threshold.
To identify sectors causing CPICH pollution 1
Open the WCDMA tutorial project if it is not already open.
2
With the CPICH - Number of Polluters layer displayed, choose Analysis CPICH Pollution Inspector.
3
In the Sector Selection dialog box, in the Selection Options section, choose the Group Selection option and ensure Downtown_UMTS (Shared) is selected.
4 Click OK. 5
Click in the Map window at a location where pollution exists as indicated by the colored bins. The CPICH Pollution Inspector dialog box updates to show the best server, soft handover sectors, and polluting sectors. The red horizontal line in the graph window indicates the thresholds for the best-serving and polluting sec tors.
6
When you have finished examining the CPICH pollution layer, close the CPICH Pollution Inspector.
7
In the Project Explorer, in the Network Analyses category, rightclick the CPICH - Number Of Pollutors layer and choose Remove.
30
Generating a Monte Carlo simulation A Monte Carlo analysis uses Monte Carlo simulation techniques to determine the characteristics of the network over repeated runs. A run consists of the distribution of random numbers of subscribers throughout the simulation area in a random pattern, and an analysis of the uplink and downlink. On the last run, operating points and discrete subscriber information are generated. Once the runs are completed, you can view the results including detailed reports, discrete subscriber information, and an optional service layer generated after the Monte Carlo simulation. Monte Carlo simulation results provide you with detailed sector loadings that you can apply to cells. You could then create a network analysis in order to generate accurate network analysis layers based on the Monte Carlo simulation results. In this lesson, you will create a Monte Carlo simulation and review the Sector/Carrier report. TIP: When working with Mentum Planet, press F1 from any dialog box to open the online Help.
To generate a Monte Carlo simulation 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, in the Monte Carlo Simulations category, right-click WCDMA Simulations and choose New.
3
On the first page of the wizard, in the Name box, type Ott_ DowntownMC and click Next.
4
On the Sector Selection page, in the Selections Options section, choose the Group Selection option and ensure the Downtown_UMTS (Shared) group is displayed.
5 Click Next. 6
On the System page, accept the defaults and click Next.
7
On the Analysis page, accept the defaults and click Next.
31
8
On the Monte Carlo page, click Next.
9
On the Simulation Area page, choose the Use An Area Grid option and ensure the Downtown grid is selected.
10 Click Next. 11 On the last page of the Wizard, ensure the Save Settings And Generate Output option is selected, and click Finish.
12 When the simulation is complete, review simulation results, and click Close.
13 Right-click the Ott_DowntownMC simulation and choose Generate Reports
Sector/Carrier.
14 Review report details and click Close. 15
Do one of the following: n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
32
Generating layer statistics Layer statistics can provide useful insight into the behavior of the network. In this lesson, you will generate layer statistics for the best server layer and display a bar graph of the results.
To generate layer statistics 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, in the Network Analyses category, expand the WCDMA Analyses node, the Ott node, as well as the UMTS_2100_ 1 node, then right-click the CPICH - Best Server layer and choose Statistics.
3
In the Layer Statistics dialog box, on the Analysis Settings pane, from the Analysis Area list, choose Downtown.
4 Click Calculate Statistics. The Report Preview dialog box opens where you can review layer statistics.
5
CTRL+Click the following column headings to select them: n
n
6
Sector Percentage Total Area
Click the Show Graph
button.
The Graph window opens with information displayed in a bar chart. You can change the chart type to Lines or Points.
7
To narrow the focus of the graph, in the Show Top Elements box, type 5.
8
Close the Graph, Report Preview, and Layer Statistics dialog boxes.
9
Do one of the following:
33
n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
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Creating and applying neighbor plans In order to design a wireless network where users can move between sectors smoothly with no interruption of service, you need to understand how sites influence each other and how they can better interact with each other. To do this, you create a neighbor plan that encompasses sector neighbor lists and using this information, you can determine the best handover strategy for the network and make appropriate decisions about network design. Neighbor relationship management in Mentum Planet encompasses the following basic elements: neighbor lists and black lists, which are defined at the sector level, and neighbor plans, which are defined at the network level. In this lesson, you will create a neighbor plan and apply it to the Downtown_UMTS group.
To create a neighbor plan 1
Open the WCDMA tutorial project if it is not already open.
2
In the RF Tools category, right-click the Neighbor Plans node and choose New.
3
On the Name, Description, And Sectors page, in the Name box, type DowntownNP.
4
In the Sector Selection section, choose the Group Selection option and ensure the list displays the Downtown_UMTS group.
5 Click Next. 6
On the Neighbor Plan Type And Algorithm page, in the Algorithm section, choose the Best Server option, click Next.
7
On the Carrier Selection page, click Next.
8
On the Algorithm Parameters page, from the Best Serving Sector Layer list, choose Ott_CPCoBSvr_UMTS, and click Finish.
9
When the neighbor planning process is complete, click Close.
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The new neighbor plan is added to the Neighbor Plans node in the Project Explorer.
10
To apply the new neighbor plan to sites in the Downtown_UMTS group, in the RF Tools category, right-click the neighbor plan you just created, and choose Apply Replace.
11 In the Sites category, double-click site C2750 to open the Site Editor. 12 In the tree view, choose the carrier assigned to sector 4 and click the Neighbor List tab to view neighbors.
13 Click the View In Map button to display neighbor relationships in the Map window.
14 Close the Site Editor. 15 To remove the neighbor list display, in the Windows category of the Project Explorer, expand all nodes, right-click the NeighborList_ SectorRelations layer and choose Remove.
16
Do one of the following: n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
36
Creating an Interference Matrix A histogram interference matrix is generated on-the-fly based on predictions. Each interference matrix consists of histograms of C/I. There is one C/I histogram for each server-interferer pair and each histogram represents the distribution of C/I between a server/interferer pair if they were assigned the same carrier. In this lesson, you will create a histogram interference matrix.
To create an interference matrix 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, in the RF Tools category, right-click the Interference Matrices node and choose New Downlink.
3
In the Sector Selection dialog box, choose the Downtown_UMTS group, and click OK.
4
In the Generate A Downlink Histogram Interference Matrix dialog box, in the tree view, choose Calculation.
5
In the Name box, type NewDowntownIM .
6
In the Traffic section, enable the Use A Traffic Map, and choose Ott_ Traffic.
7 Click Generate, and once generation is complete, close the dialog box. 8
In the Project Explorer, in the RF Tools category, expand the Interference Matrices node.
9
Right-click the NewDowntownIM and choose View.
10
Review histogram interference matrix details and when you are finished, click Close.
11
Do one of the following:
37
n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
38
Planning scrambling codes Using the Scrambling Code Planning tool, you can allocate scrambling codes automatically based on distance or interference. When you create a scrambling code plan, each sector is assigned a sc rambling code. The scrambling code is made up of a group code, which is the primary scrambling code, and a secondary code. There are 512 primary scrambling codes available for each carrier. For each primary code, there are 15 secondary codes. Before planning scrambling codes, you must define the scrambling code exc eptions and triplets in the network settings.
To plan scrambling codes 1
On the Network toolbar, click the Network Settings
2
In the tree view, expand the Network Technologies node, and choose WCDMA.
3
Click the Scrambling Code Exceptions tab.
4
Scroll to the bottom of the list and enable the check boxes for all codes in rows 62, 63, and 64.
5
Click the Scrambling Code Triplets tab.
button.
6 Click Create. 7
In the Create Scrambling Code Regions And Triplets, in the Step box, type 8 and click OK.
8
In the Network Settings dialog box, click OK.
9 Choose Optimization
Scrambling Code Planning.
10 In the Scrambling Code Planning dialog box, on the General tab, in the Plan Name box, type DowtownOtt .
11 From the Group To Plan list, choose Downtown_UMTS. 12 From the Group To Consider list, c hoose All_sites_UMTS.
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The group to consider should encompasses more sectors than the group to plan.
13 In the Planning Strategy section, choose the Group option. 14 In the Interference Matrix section, ensure the NewDowntownIM is selected.
15 Enable the Neighbor Plan check box and choose the DowntownNP. 16 From the Carrier list, choose UMTS_2100_1. 17 Click Generate. 18 When plan generation is complete, click Save. 19 Click Close.
To apply a scrambling code plan 1
In the RF Tools category, expand the Scrambling Code Plans node, right-click the DowntownOtt plan and choose Apply.
2
In the Network Update dialog box, click Yes to update the network.
To view reuse patterns 1 Choose Tools 2
Carrier And Code Display
WCDMA.
In the Sector Selection dialog box, choose the Group Selection option, and from the associated list, choose Downtown_UMTS.
3 Click OK. 4
In the Carrier And Scrambling Code Display dialog box, do the following: n
In the Mode section, choose the All Selected Sectors option.
n
In the View section, choose the Scrambling Code option.
40
n
Enable the check boxes next to the 144, 152, and 160 Physical Cell IDs
5 Click View. The sectors using these PCIDs are displayed in red.
6 Click Close
41
Placing sites automatically Using the Automatic Site Placement Tool (ASPT), you can place sites in a defined area quickly and easily. There are two modes that you can use with the ASPT: n
n
Basic—the tool generates hexagons based on the criteria you define and places a site at the center of each hexagon using either the default site configuration or the site template you specify. If you are using a clutter file, you can exclude clutter classes such that no sites will be placed within them. Advanced —the tool generates complex shapes based on the planning strategy you choose and the criteria you define (including clutter-specific criteria) and places a site at the center of the shape using the site template you specify. Each site is given a level of priority that determines whether it becomes a possible site candidate. In Advanced mode, you can use a traffic map in order to generate more accurate shapes. In addition, you can use existing and candidate sites in the site placement process.
In this lesson, you will use the Advanced ASPT option to place sites automatically.
To place sites automatically 1 Choose Optimization 2
Automatic Site Placement.
In the Automatic Site Placement dialog box, on the General tab, do the following: n
n
Choose the Advanced option. In the Region section, choose the Area option and ensure CoreCluster_Area is selected.
3
Click the Site Templates tab.
4
For the Seawater class, in the Place Site column, choose Never from the list.
5 Click Generate.
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Ten new sites are proposed.
6 Click Create Sites. 7 Click Close. 8
Do one of the following: n
n
If you want to proceed to the next lesson, leave the Map window open. If you want to stop here, choose File Close Project, click Yes to confirm you want to close the project and Yes to confirm you want to save the project.
43
Optimizing a single site When you make changes to sector settings and want to understand the impact these changes have, you can optimize a single site and view coverage and interference layers (i.e., the best server signal strength layer and the C/(N+I) layer). In single site optimization, predictions are generated along radials that span 170 degrees (ignoring the antenna backlobe). Points spread along the radials are then optimized using the defined criteria and layers are generated. In this lesson, you will optimize a site.
To optimize a single site 1
Open the WCDMA tutorial project if it is not already open.
2
In the Project Explorer, in the Sites category, expand the Sites node.
3
Click the Sites node. A filter box is displayed.
4
In the box, type Site. Only the newly generated sites are displayed.
5
Expand the Site_1 site.
6
Right-click the WCDMA base station and choose Optimize.
7
In the Sector Selection, accept the default values, and click Select.
8
In the Site Optimization Tool dialog box, on the General tab, enable the Use A Traffic Map check box and, from the associated list, choose Ott_Traffic.
9
Click the Optimization tab.
10
Choose the Use Generic Goals option.
11 Clear the Optimize CPICH Ec Coverage check box.
