wcdma antenna tilt optimization opt3.1 cd2 v2

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NetAct Optimizer 3.1 CD2 for WCDMA

WCDMA Antenna Tilt Optimization



Nokia Siemens Networks Academy

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CREL - Pointer to the WCDMA cell (WCEL) which uses

parent RET object

ECREL - Pointer to the external cell which uses parent RET

object

RCUA - RealTilt Control Unit

RET - Remote Electrical Tilt unit

Iuant is the interface to control RET. It is specified by 3GPP.

Abbreviations



Angle = mechanical angle (RET parameters)

Mechanical Angle information is never stored in WCEL

parameters

Tilt Angle (WCEL parameter in Configurator))

= Angle (Conf) = electrical tilt angle (Opt)

About the tilt angles



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

• Check the availability of the KPIs needed for Antenna Tilt

Optimization

• Edit the rule settings for Antenna Tilt Optimization

• Run the Antenna Tilt Optimization rules

• Analyze the results

• Provision the antenna tilt changes

Module Objectives



• Overview

• RET solution

• Prerequisites for Antenna Tilt Optimization

• Running the Antenna Tilt Optimization rules

• Checking the results

• Provisioning a tilt plan

• Analyzing the success of tilting

Antenna Tilt Optimization



Antenna Tilt Optimization Overview

Optimizer suggests antenna tilt change after the user runs Antenna Tilt Optimization rules based on KPIs.

The user can edit the rule KPIs, the thresholds and operators.

The results can be visualized on Map and in Browser.

Antenna Tilt Optimization can handle two different antenna solutions:

1.Remote Electrical Tilt

2.Manual Antenna Tilt

In this case the changes can be stored in Excel file and provisioning is done manually.



• Overview

• RET solution









Remote Electrical Tilt Solution

For Remote Electrical Tilt the following is needed:

1. HW: Flexi or UltraSite BTS

2. SW : RETAm application in NetAct Connectivity servers for

• uploading RET data

• downloading RET data

• calibration of RETs

3. SW licence: CM_MGMT_3G_RET

4. RETam database in NetAct database server



RET Architecture

Remote Electrical Tilt unit (RET) is used for adjusting the antenna tilt.

One RET may affect multiple cells and one cell can be affected by multiple RETs.

RETam works with the RealTilt Control Unit (RCUA).



WCEL

Object instance

Tilt Angle

RET

Managed Object DN

Angle

Local Cell Recourse ID List

Value 1

Value ...

Value n

Max Angle

Min Angle

PLMN

RNC

WBTS (Ultra)

RCUA WCEL Electrical Tilt Angle

RET DN

Max Tilt Angle

Min Tilt Angle

PLMN

RNC

WBTS

SITE

Parameter mapping – UltraSite WCDMA BTS

Configurator Optimizer

Note: In Optimizer the

RET object is only

visible in Browser.



FlexiBTS in CM Editor



FlexiBTS in Optimizer



WCEL

Managed Object DN

Tilt Angle

RET

Managed Object DN

Min Angle

Max Angle

Angle

PLMN

RNC

WBTS (Flexi)

BTSSC WCEL Electrical Tilt Angle

RET DN

Min Tilt Angle

Max Tilt Angle

PLMN

RNC

WBTS

SITE

Parameter mapping – FlexiSite WCDMA BTS

Configurator Optimizer

CREL

Target Cell DN

ECREL

Target Cell DN

WBTS (Flexi)

WCEL

Managed Object DN

Tilt Angle

WBTS

WCEL RET DN

Min Tilt Angle

Max Tilt Angle

Tilt Angle

NOTE: ECREL may also link to

other cell types than WCEL.



Example of a shared RET

Uploading of RET parameters creates the CREL object. The ECREL object has

to be created manually.



Tilt information in Antenna object

The maximum amount of tilt the

RET system can support

Mechanical tilt



1. Check prerequisites

2. Specify the scope for Antenna Tilt Optimization

3. Run Antenna Tilt Optimization for the scope

4. Analyze the results:

• Check the affected area

• Run another rule or the same rule with different day KPIs

• Use KPI Trend View

5. Provision the changes

Antenna Tilt Optimization Steps



• Overview

• RET solution









Prerequisites

• In order to use Optimizer for proposing antenna tilt change

– OPT_PERF_OPTIMISATION_3G license

– Select Antenna Tilt optimization KPI group to be automatically retrieved (or

retrieve manually)

– Start measurement Service Level (M1001), RRC Signaling (M1006) and Inter

System Hard Handover ( M1010) in the network

• In order to get electrical tilt values from RET and to provision the changes

directly to network

– CM_MGMT_3G_RET license

– Install and configure the RetAm application on each Connectivity Server

– Perform Force Upload operation

– omc user needs to belong to retam group

• CM Refresh in Optimizer

• Check Optimizer Preferences



Antenna Tilt Optimization KPIs



Antenna Tilt Optimization Preferences

Antenna Tilt Change specifies the maximum change proposed by Optimizer.



• Overview

• RET solution









Running the Rules – specify the target

You can start Antenna Tilt Optimization from

Scopes, Tools, Browser or Navigator.



Running the Rules - overview

Select the Daily KPI

summarization level



Edit Rule Settings – Overshooter rule



Edit Rule Settings – Coverage hole rule



Edit Rule Settings – Overlapping coverage rule



Opening a plan for the results

If Elements matching the rules are found,

you will be asked to open a plan.



• Overview

• RET solution









Results in Browser • Cells to be tilted are listed in Browser with the KPI(s)

• Cells have a planned tilt value and the relative tilt value (i.e. the proposed

change)

• New antenna tilt value (=actual + the tilt change) and Antenna tilt change ( +2 or -2)

WCELs using RET

WCELs with manual

antenna tilt only



Visualizing affected areas (1/2)

For visualizing the cells affected by antenna tilting, select Scope creation.

Affected area is the collection of the cell’s neighbors.



Visualizing affected areas(2/2)

By default the Scope KPIs are retrieved for the newly created scopes.

Using these KPIs you can follow the impact of antenna tilting.



SCOPE KPIs



Locating affected areas on Map



• Overview

• RET solution









Provisioning • Cells to be tilted are listed in Browser with the KPI(s)

• Cells have a planned tilt value and the relative tilt value (i.e. the proposed

change)

• New antenna tilt value (=actual + the tilt change) and Antenna tilt change ( +2 or -2)

NetAct

Excel

WCELs using RET

WCELs with manual

antenna tilt only



Provisioning when RET is in use

Export the plan to CM database:




After Export, the planned value can be seen in CM Editor as a

WCEL parameter:




In CM Operations Manager, the Plan Prepare functionality

copies the planned tilt value to RET parameter ”Angle”.

The provisioning process also updates the data in RETam

database.



Provisioning when RET not in use

Excel



• Overview

• RET solution









In Browser

After the antenna tilt provisioning, user can list scopes to the

Browser and analyze the scope KPI values to analyze the

effect of the antenna tilt on network performance.



Presentation / Author / Date

On Map – Initial optimization scope

Scope KPI -1

Select dates before and after

Tilt provisioning, and the scope

KPI to be analyzed



On Map – Affected Area visualization



In KPI Trends -TrendView



Summary


- has its own KPIs

- the rules can be run for a specified time

- before running the rules the rule settings can be edited

- the results can be listed to Browser or visualized on Map

- the affected area of tilting can be managed as a scope

- the results can be provisioned using CM Operations Manager

wcdma antenna tilt optimization opt3.1 cd2 v2

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