03 GSM Adjacency Optimisation OPT 3.0

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2 Nokia Siemens Networks Presentation / PLe /23.8.2010

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At the end of this module the trainee should be able to:

Edit the common adjacency optimisation parameters for a

separate deletion or creation of adjacencies

Set the required parameters for the automatic measurement-

based adjacency optimisation

Perform adjacency optimisation

Module Objectives


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Prerequisites

Invalid adjacencies fixed

Antennas defined for every cell

Interference matrix availableAdjacency Optimisation KPIs available for Adjacencies

Adjacency Constraints have been created or imported

Adjacency templates have been created for each object typeTemplate assignment rules have been created


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Methods and Startup

Creation based on IM values, deletion based on ADCE KPIsCheck the KPI date and summarisation level

Select target objects from the Navigator, Map or Browser


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Starting GSM Adjacency Optimisation

Only ADCEs selected for measurement-based GSMadjacency optimisation

CIP or FEP can also be selected if available

Check the retrieved IM sets and priorities


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Adjacency Optimisation Tool View


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GSM Adjacency Optimisation

How can I start the measurement-based adjacency

optimisation?

How can I find the unused (unnecessary) adjacencies (deletion

plan)?

find the missing adjacencies (creation plan)?


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Common Parameters

Bidirectional optimisation(recommended)

Creation and deletion of

adjacencies into and out fromscope allowed(recommended for smallscopes)

Check maximum and minimumAdjacency List Lengths

Changes to adjacenciesbetween frequency bands

can be disabledFrequency band specific list

length settings can beenabled


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Deletion Options for All Adjacency Types

Deleting outgoingadjacencies to foreigntarget cells can beallowed

Adjacencies withoutmeasurements will have 0

values for KPIs and aredeleted


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Deletion Parameters for ADCE

Bidirectionaldeletion requires atleast one bad valuein both directions

Additionalconditions can beused to avoiddeleting adjacenciesin low traffic cells


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Detailed Results on Deleted

Infocolumn shows the creation/deletion reason

Include Changecolumn defines the results to be saved inthe plan


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Saving the Results

The results must be saved to the plan

Save is possible only to the plan that is open when AdjacencyOptimisation starts, or to a plan that is created after pressing

SaveAfter the save the results can be listed to Browser or shownon the map


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Exercise

Check and set Commonparameters

Set Deletionparameters and start the optimisation

View the results and check different views in the AdjacencyBrowser

Change parameters and run again

Save the results into your plan


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GSM Adjacency Optimisation

How can I start the measurement-based adjacency

optimisation?

How can I

find the unused (unnecessary) adjacencies (deletionplan)?

find the missing adjacencies (creation plan)?


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Creation Options for All Adjacency Types

Creating BCCH and BCCH-BSIC collisions can be allowed ifFrequency Optimisation is done in the same plan

Normally BCCH or BCCH-BSIC collisions are not allowed

If there are existing collisions in the network no new adjacencies are

created for those cells unless collisions are allowed


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Creation Thresholds

Bidirectional creation requires good values in the outgoing direction

25 RXLEV = -96 dBm ( -95dbm)

Theta angle limitation not necessary (because of the measurements)


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Adjacency Optimisation

Start optimisation. Beforestarting, check that Deletionis not selected.


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Detailed Results on Created

Infocolumn shows the creation/deletion reasonInclude Changecolumn defines results for the save


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Results

Save the resultsLocate on Map or List to Browser to check the templates

You can select all by pressing Ctrl-A


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Exercise

Check and set Commonparameters

Uncheck Delete Adjacenciesbox in the Deletiontab

Set Creationparameters and find the missing adjacencies inyour scope

View the results in the Adjacency Browser

Change parameters and run again

Save the results into your plan


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Summary

Prerequisites

Site assignments and Antennas correctly defined

Adjacency templates and template assignment rules defined

Adjacency Constraints defined

Measurement-based deletion of GSM adjacencies Common Parameters

Deletion based on KPI values

Measurement-based creation of GSM adjacencies

Common Parameters Creation based on Interference Matrix values

Results saved in to the plan Plan that is open when the tool is started

Plan that is created after pressing the Save button

After the save the results can be located on the Mapand listed to the Browser


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Document change history

First version for Optimizer 3.0PLe1.023.8.2010

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03 GSM Adjacency Optimisation OPT 3.0