2.9_Use of ACCO - Released

8/11/2019 2.9_Use of ACCO - Released

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Use of ACCO

Competence Center

April 2009



Agenda

1. High Level ACCO Overview

2. ACCO Usage Scenarios in ND RNP Projects

3. Using ACCO Greenfield

4. Using ACCO Optimisation

5. Summary & Examples



All Rights Reserved © Alcatel-Lucent 2008, 20093 | Use of ACCO | April 2009

High Level ACCO Overview

1




High Level ACCO Overview

Fully integrated with A9155

Performs the tasks that are tedious & timeconsuming to perform

Site selection

Site placement

Antenna tilt & azimuth optimisation

Radio feature selection

Allows a large RNP to be performed in substantially less time with greaterconsistency and repeatability

Broken into two modules:

ACCO Greenfield

Primarily for site placement but also for site selection, tilt azimuth optimisationand radio features selection

– Doesn’t consider interference

ACCO Optimisation

Does everything except new site placement

Selected as the officialACP tool for Alcatel-

Lucent




ACCO Usage Scenarios in ND RNP Projects

2





Network Design Process

Radio Network Dimensioning

Required receive levels for different morphos (based on LKB analysis)

Site configuration for different morphos

No. Carriers, Max. Subs / Site, Radio Features, etc.

An indicative site count for the different morphos and areas

Next Step RNP study to confirm site count and locations

Radio N etwork

Optimisation

Radio N etwork Planning

(Or Cell Planning)

Radio N etwork Dime nsioning

(Or Cell Dimensioning)

PhasesInputs Outputs

Coverage

Requirements

Land Usage / Area

Traffic Requirements

Offered services

Service bit rate, traffic

Volume, subscriber density

QoS Requirements

BLER, Blocking, Coverage

Probabil ity, Indoor

Penetration…

Link Budget, Number

of sites, cell size

calculation

Node-B configuration

Feature scheduling

Performance Analysis

I n c r

e a s e d

A c c u r a c y

I n c r

e a s e d

A c c u r a c y


http://slidepdf.com/reader/full/29use-of-acco-released 7/37All Rights Reserved © Alcatel-Lucent 2008, 20097 | Use of ACCO | April 2009


Network Design Process

Radio Network Planning

No site information known

Some or all site locations are known

Candidate site locations

Radio N etwork

Optimisation

Radio N etwork Planning

(Or Cell Planning)

Radio N etwork Dime nsioning

(Or Cell Dimensioning)

PhasesInputs Outputs

Coverage

Requirements

Land Usage / Area

Traffic Requirements

Offered services

Service bit rate, traffic

Volume, subscriber density

QoS Requirements

BLER, Blocking, Coverage

Probabi lity, Indoor

Penetration…

Link Budget, Number

of sites, cell size

calculation

Node-B configuration

Feature scheduling

Performance Analysis

I n c r e a s e d

A c c u r a c y

I n c r e a s e d

A c c u r a c y


http://slidepdf.com/reader/full/29use-of-acco-released 8/37All Rights Reserved © Alcatel-Lucent 2008, 20098 | Use of ACCO | April 2009


1) No site information known – True Greenfield

Use ACCO Greenfield - the steps to follow are:

1. Fulfill pre-requisite inputs in A9155 for ACCO Greenfield

2. Optionally select vectors for dedicated highway coverage

3. For each clutter and vector:

Define the target RX Levels, associate one or more site templates

Optionally define a range of heights and if considering capacity constraints per site definetraffic densities

4. Optionally select a traffic map

5. Optionally define site template traffic limits and site template costs6. Run Greenfield Optimisation

Sites will be placed to meet the defined coverage and capacity requirements

7. Perform a sanity check in A9155 on the results

Check coverage is neither too aggressive or conservative (inline with dimensioning)

Due to the optimised ACCO Greenfield algorithms it is not possible to meet the coverageobjective 100%. If too conservative then reduce the “Site Density Slider” in ACCO Greenfield orif too aggressive, increase the “Site Density Slider” and return to step 6

Tweak any site locations that don’t make sense by manually adding/removing some sites orrepositioning them

9. The “True Greenfield” rollout is then complete

This method should be quite fast, as an indication for 500 sites (depending on the resolution &coverage size of course), it should take in the order of 30-45mins (to run the optimisation).





2) Some or All Locations Known – Partial Greenfield

There are a number of types of deployment scenarios that fall into this category:

Where there are some site locations that are mandated for use by the customer

There may be an existing network for which coverage is being extended

The customer is densifying their existing network with new infill sites

The process is the same as the True Greenfield scenario

Exception: For Step 1 any existing sites that must be considered by ACCO Greenfield

should be active in A9155

ACCO Greenfield will first run predictions for the existing sites without optimising any of

their parameters (tilt, azimuth, height)

ACCO will then progressively place new sites to fill the gaps between the existing sites

This method will be faster than the True Greenfield scenario as many of the sitelocations will already be fixed





3) Existing + Candidate Sites – Overlay

This scenario is more typical than the Partial Greenfield scenario

Some deployment scenarios that fall into this category include: An existing network (e.g. a 2G network) where one or more of their existing sites are

to be reused for an “overlay” network (e.g. a 3G network)

Customer asks ALU to recommend which sites to “overlay” and where new sites are required

The pool of existing sites may be from a site leasing company or from anotheroperator (tower sharing)

Customer asks ALU to recommend which sites to “overlay” and where new sites are required

The process is the same as that outlined above for the True Greenfield scenario

Exception: For Step 1

Any existing sites that must be considered by ACCO Greenfield must be active inA9155

Any candidate site location should be defined in A9155 as sites without transmitters

Exception: For Step 5 the input “Select Candidate Location if Performance >=” must beappropriately defined

Depends on the importance of using candidate sites as opposed to new sites

This method will be slightly slower than the True Greenfield scenario





What About ACCO Optimisation?

With the functionality now provided with ACCO Greenfield there is no

requirement to also use ACCO Optimisation

After running any one of the three Greenfield usage scenarios there is always the

option to run ACCO Optimisation after finishing the Greenfield optimisation, this

can be beneficial when

Want to further optimise the site azimuths and tilts In particular if coverage quality is an important requirement

Need to ensure coverage requirements are achieved with more precision

Want to demonstrate to a customer the trade-off between number of sites and

achieved coverage There is a important requirement to maximise coverage quality, i.e. minimise

interference

Note that with ACCO Optimisation you can’t place new sites!





Overall Recommendations

ACCO Greenfield is now very flexible – use Greenfield to both place new sites as

well as select amongst candidate sites

Don’t have to run ACCO Optimisation




Using ACCO Greenfield

3




ACCO Greenfield

Pre-requisites in A9155

The A9155 RNP project must be setup for running predictions:

Clutter and DTM databases configured

Clutter specific parameters defined, i.e. indoor losses, std dev, etc

Propagation model configured

Transmitter and cell parameters properly defined

ACCO can consider the placement of one or more different site templates fordifferent clutters and/or vectors

Site templates must be defined in A9155

Computation zone defined

The target receive levels for the different morphologies of interest

Optional: Existing sites should be activeOptional: Candidate sites should have their transmitters deleted

Optional: Vectors for which highway coverage is to be provided

Optional: A traffic map to define the subscriber distribution




ACCO Greenfield

Launching ACCO Greenfield

Create

Optimization

Environment

Load

Optimization

Results

Run ACCO

Optimization

Run ACCO

Greenfield

Create

Measurement

Environment

Always used Advanced Mode!




ACCO Greenfield

ACCO “Advanced Greenfield” Configuration Window

Rx level = CPICH Tx Power + Antenna Gain - Feeder losses – MAPL (MAPL accounts for body loss, interference margin,penetration margin and shadowing margin)

Template: 1 or more per morpho (nonemeans no sites)

Optional Heights: Space delimited, will uselargest unless capacity limited

Optional Add Vectors: For highwaycoverage.

Optional Edit Templates: Can edit A9155site templates directly from here.

Optional Traffic Density: used to define atraffic density per clutter type if no trafficdensity map has been specified.

Optional Traffic Map: Bil format traffic map

Site Density Slider: Controls the aggressiveness of the site placement, a lower setting results in less sites and a highersetting results in more sites. One of the drawbacks of ACCO Greenfield’s highly optimised coverage computation algorithmsis that the tool does not calculate the coverage levels at all pixels during the optimisation.

Optional Sites in Corridor Along Vector:Gives greater flexibility on where to placesites

Optional Minimum captured traffic persite: Sites placed only when justified bysufficient traffic, i.e. where the returnjustifies the investment

Allowed gap length: allows to adjust thesize of coverage gaps that are allowedduring placement.

N

E

W

F

E

A

T

U

R

E

S




ACCO Greenfield

ACCO “Advanced Greenfield” Configuration Window - site density slider

The site density can be varied, relative to the defined

thresholds. For example:

If the coverage probability is easily reached, less sites may

be sufficient. Thus, the user can reduce the thresholds by

“1” (which equals -1dB in the required coverage) and

rerun the deployment. Instead of a coverage of e.g. -

80dBm, a value of -80dBm -1 -81dBm will be targeted

and hence less sites needed

If a slightly higher coverage probability is needed, the

slider has to be put towards the right hand side. Instead

of -80dBm, e.g. -78dBm may be targeted and hence more

sites are proposed




ACCO Greenfield

ACCO “Advanced Greenfield” Configuration Window

Optional Traffic Limit = This allows the maximum traffic per site template to be defined (only relevant if you havespecified a traffic density or have specified a traffic map. If this limit is exceeded the cell range will be reduced)

Optional Cost = Used to find most cost effective solution (only relevant when you have more than 1 site template selected

per clutter or vector)

Optional Applicable for: Controls when a sitetemplate can be used:

All Sites / New Sites / Candidate Sites / None

Select Candidate Location if performance>=: This parameter allows to prefercandidate locations over new site locations.It is similar to a cost reduction of candidatesites compared to new sites.

On the example, if a candidate site providesat least 25% of a new site’s coverage, it willbe selected.

Optional Allow candidates only: If checked,no new sites will be created, only candidatesites will be used.

Optional Consider sites without

transmitters as candidates: sites withouttransmitters in A9155 will be considered ascandidate locations. Azimuth and tilt will beoptimized.

Optional Consider sites with only inactivetransmitters as candidates: sites where onlyinactive transmitters are assigned will beconsidered as candidates. No furtherparameter optimizations will be done.

NEW

FE

ATURES




Using ACCO Optimisation

4




ACCO Optimisation

Pre-requisites in A9155

The A9155 RNP project must be setup for running predictions:

Clutter and DTM databases configured

Clutter specific parameters defined, i.e. indoor losses, std dev, etc

Propagation model configured

Transmitter and cell parameters properly defined

Computation zone defined

All sites must be fully configured and active in A9155

Candidate sites to be considered by ACCO Optimisation must be fully configured but

inactive in A9155 (unlike Greenfield they should not have their transmitters deleted)

Inactive sites will be considered with the site activation optimisation feature

Optional: A traffic map to define the subscriber distribution

This is used in ACCO Optimisation when you wish to place greater emphasis on the

network performance in locations with higher traffic

Optional: Define additional TMAs for advanced technology activation




ACCO Optimisation

Launching ACCO Optimisation

Create

Optimization

Environment

Load

Optimization

Results

Run ACCO

Optimization

Run ACCO

Greenfield

Create

Measurement

Environment

Key input that is critical for a typicalpre-sales ND project is the optimisationresolution which here is set to 100m

It is recommended to only use <100m ifthe project needs to be very precise

Results achievable with a 100mresolution are more than sufficient interms of accuracy for pre-sales needs




ACCO Optimisation

Configuration Windows

Project Specifications

Select “Load network data”

Optional: Select a traffic map

Network Settings

Select the network of interest(usually there will only be one

anyway, selected by default)

Optional: Configure traffic map

settings (the traffic map if

selected in the project windowwill be selected by default

anyway)




ACCO Optimisation

Optimisation Ranges

Select all of the Sectors in the left hand panel

If there is flexibility to adjust both tilt and

azimuth then select both

The default optimisation ranges are ok but

aggressive

It is not recommended to select “Pilot Power”

as an optimisation parameter

Optional: If some sites were inactive in the A9155project then you have the option of enabling

“Allow activation”. ACCO will select the optimum

site to activate.

Ignore: Do not worry about cost inputs – this is

much more for operator focused operational

needs.

Optional: Selecting the option “Allow TMA Modification” allows for the consideration of Advanced Technology Activation forthe handling of different radio features

This requires the definition of different “TMAs” in A9155 with appropriate Noise Figures, Reception Gains andTransmission Losses (the gains and losses can be positive or negative depending on the radio feature)

For example, a high power amplifier might be defined as a TMA a Noise Figure = 0dB, Reception Gain = 0dB andTransmission Loss = -3dB

Optional: Selecting “custom pattern list” allows modifications of the actual antenna pattern. Next to the checkbox 9155

ACCO displays the number of selected antenna pattern that are allowed for exchange during optimization. All antennapatterns in a 9155 project can be used.




ACCO Optimisation

Optimisation Targets

To add optimisation targets:

In the UMTS example shown the recommended combination to consider is one coverage target based on Pilot RSCP and onequality target based on Pilot Ec/Io

For each optimisation target the following can be defined

A fixed target level for all morphologies or on a per clutter basis. It is recommended to specify these on a per clutter basis

The relative importance of achieving the optimisation target can be weighted by the clutter type and also by a traffic map(if selected earlier)

For Ec/Io, it is necessary to define the terminal, mobility and service. The terminal influences the body loss and themaximum transmit power, and the service influences the data rate and the maximum service power.




ACCO Optimisation

Optimisation Targets – focus on clutter weights

9155 ACCO can combine and weight different optimization targets jointly

By applying a weight higher than zero the target is considered Global and clutter defined optimization requirements can be considered. In that case, the

global weight is the overall multiplier for the clutter weights.

Example:

Clutter A = 1Clutter B = 5

Clutter C = 1

Clutter D = 0.5

With the enabled clutter dependentweighting we can see that the areadescribed by Clutter B is 5-times moreimportant than Clutter A and Clutter Cand 10-times more important thanClutter D.

Practically, this means that an

additional 1km2 in coverage in Clutter Bis 5-times the value as an additional1km2 in coverage in Clutter A and C ,and 10-times the value than in ClutterD.

RECOMMENDED




ACCO Optimisation

Optimisation Targets – focus on traffic weights

You can apply traffic limits to each of the cells, and to weight the target by a traffic map.

Balance footprints: If the option is active, the optimization algorithms will generate a

compromise between the largest possible target objective and balanced footprints.

"Balanced" in this case means that neighboring footprints should have similar size (if notraffic density map is used) or similar traffic utilization (i.e. captured traffic / maximum

captured traffic if a density map is used).

Relative weight: Determines the weight of the footprint balancing target function in

relation to the "parent" target function. The absolute weight is the parent target function's

weight multiplied by the relative weight.

OPTIONAL

Apply traffic map: This option can only be enabled if a

global traffic density map has been defined. Trafficdensity weighting allows you to focus on the areaswhere the highest traffic occurs. High-traffic areas willbe more important, areas carrying less traffic will beless important during the optimization process.

Apply captured traffic limit: Allows the consideration of

maximum traffic limits for each sector in the network.This option can only be enabled if a global trafficdensity map has been defined. The traffic limits persector are defined in the Network settings tab sheet.




ACCO Optimisation

Optimisation Options




ACCO Optimisation

Optimisation Run Options

Set the optimisation mode to FAST

As the benefits from a moreaccurate optimisation will not be

perceivable.

Set the simulation resolution. Here the

minimum resolution you can use is the

resolution at which you created the

optimisation environment. It is recommended to only use

<100m if the project needs to be

very precise

The results achievable with a 100m

resolution are more than sufficient

in terms of accuracy for pre-salesneeds.

Start the optimisation and wait ……




ACCO Optimisation

Verification of the optimization results in A9155

To verify the optimization results in A9155 the optimized configuration must

be loaded in A9155

The results can be loaded into the currently open .ATL project

By default a new project file with the same name as the result file will be

generated

CCO O




ACCO Optimisation

Verification of the optimization results in A9155: Inspector

The Inspector is an efficient

visualization tool to quickly

identify the differences

between before and after

the optimization

You can access it by clickingon “visualize results” when

the optimisation is finished

The visualization includes:

• Parameters

• Predictions

ACCO O i i i




ACCO Optimisation

Inspector: Visualization of parameter changes

The 9155 ACCO Inspector is to be used as complementary functionality to the

visualization in A9155 Parameter changes can be displayed easily for all relevant RF parameters

ACCO O ti i ti




ACCO Optimisation

Inspector: Visualization of prediction plots

The 9155 ACCO Inspector helpsto display and localize parameter

modifications very efficiently

Very fast comparison of the

network configuration before

and after the optimization

Very fast processing of prediction

plots




Summary & Examples

5




Summary

Should be endeavoring to use ACCO for all RNP projects

There will always be some projects where it doesn’t make sense, e.g. very

small scale projects, etc

If you need support on whether ACCO makes sense for your RNP don’t hesitate

to contact the ND Competence Centre




More than 83% of the uncovered areas eliminated with tilt

(electrical/mechanical) and azimuth changes.

A9155 A9155

Example: Better coverage, Ec/Io and capacity in A9155

A9155 ACCO




More than 47% of areas with insufficient Ec/Io removed

Potential served traffic increased by more than 6%

A9155 A9155

Example: Better coverage, Ec/Io and capacity in A9155

A9155 ACCO



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