ATOLL NEIGHBOURS

Neighbour Features in Atoll

Definitions

Importing Neighbours

Planning Intra-technology Neighbours

Planning Inter-technology Neighbours

Displaying Neighbour Relations on the Map

Modifying Neighbour Relations Manually

Exporting Neighbour Relations

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Definitions

Reference Cell

The cell to which you are allocating neighbours

Possible Neighbours

The cells that fulfil the requirements to be neighbours

Intra-technology Neighbours

The cells defined as neighbours that use the same technology as the reference cell

E.g., UMTS-UMTS, GSM-GSM, LTE-LTE

Inter-technology Neighbours

The cells defined as neighbours that use a technology other than the reference cell

technology

E.g., UMTS-GSM, UMTS-LTE, GSM-LTE

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Importing Neighbours (1/2)

Possibility to copy/paste or to import a list of neighbours

Prerequisites

A text file with at least 2 columns

• Name of the reference cells

• Name of neighbour cells

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Importing Neighbours (2/2)

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Planning Intra-technology Neighbours (1/11)

Possibility to define neighbourhood constraints to be considered during the automatic

neighbour allocation

List of neighbour relations you may force

or forbid

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Planning Intra-technology Neighbours (2/11)

Allocation Parameters

Maximum Number of Neighbours

• Global value for all cells or value specified for each cell

Maximum Inter-site Distance

Allocation Strategy Based on the Overlapping of Cell Coverage

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Planning Intra-technology Neighbours (3/11)

GSM Technology

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Coverage

conditions

Overlapping

criterion

Calculation

options

Do not select the option if

you want to keep existing

neighbours

Start allocation

Planning Intra-technology Neighbours (4/11)

GSM Technology

Overlapping Criterion

% min covered area is defined by the formula : (SA ∩ SB) / SA where :

SA is the coverage area of A restricted by HO start and HO end

SB is the best server area of Cell B B best server area

(Candidate)

A best server area

(Reference)

A

B

Minimum

BCCH of A

Best signal level

for A - HO start

Best signal level

for A - HO end

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Planning Intra-technology Neighbours (5/11)

UMTS Technology

Intra-carrier neighbours: neighbours which perform handover using the same carrier

Inter-carrier neighbours: neighbours which perform handover using a different carrier

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Coverage conditions

Overlapping

criterion

Calculation options

Do not select the option if

you want to keep existing

neighbours

Start allocation

Planning Intra-technology Neighbours (6/11)

UMTS Technology – Intra-carrier Neighbours

Overlapping Criterion

% min covered area is defined by the formula : (SA ∩ SB) / SA where :

SA is the best server area of cell A. Cell A is the first one in the AS

SB is the area where cell B can enter the as of cell A B best server area

(Candidate) A best server

area

(Reference) B

Minimum

Ec/Io for

A

A SA ∩ SB :

Area where :

Ec/Io(B) ≥ Ec/Io(A) – Ec/Io

margin(A)

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Planning Intra-technology Neighbours (7/11)

UMTS Technology – Inter-carrier Neighbours

Overlapping Criterion (carrier saturation)

% min covered area is defined by the formula : (SA ∩ SB) / SB where :

SA is the best server area (on carrier 1) + handoff area of cell A

SB is the best server area of cell B (on carrier 2) B best server area

(Carrier 2 -

candidate) A best server area

(Carrier 1 -

reference) B

Minimum

Ec/Io for

A

Best Ec/Io for

A - Ec/Io

margin

A

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Planning Intra-technology Neighbours (8/11)

UMTS Technology – Inter-carrier Neighbours

Overlapping Criterion (out of carrier coverage)

% min covered area is defined by the formula : (SA ∩ SB) / SB where :

SA is the coverage area of A + Ec/Io margin (and best server on carrier 1)

SB is the best server area of cell B (on carrier 2)

B best server area

(Carrier 2 - candidate)

Minimum Ec/Io for A

and A best server

area (carrier 1 -

reference)

Minimum Ec/Io for A

+ Ec/Io margin

A

B

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Planning Intra-technology Neighbours (9/11)

LTE Technology

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Coverage conditions

Overlapping criterion

Calculation options

Do not select the option if

you want to keep existing

neighbours Start allocation

Planning Intra-technology Neighbours (10/11)

LTE Technology

Overlapping Criterion

% min covered area is defined by the formula : (SA ∩ SB) / SA where :

SA is the coverage area defined by the RSRP Margin (orange ring below)

SB is the best server area of cell B

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Cell B best reference

signal level area

(candidate) Cell A best reference

signal level area

(reference)

Cell A

Best server area

Cell B

Best server area

Cell A reference

signal threshold

(from Min RSRP)

RSRP Margin

Planning Intra-technology Neighbours (11/11)

Allocation Result

Sorted List of Neighbours with Allocation Reasons and Importance Value (0-1)

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Commit selected

neighbours only

Allocation results

Sort and filtering tools

Summary report listing existing, new

and removed neighbours

Planning Inter-technology Neighbours (1/5)

Possibility to define neighbourhood constraints to be considered during the automatic

neighbour allocation

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List of neighbour relations you may force

or forbid

Planning Inter-technology Neighbours (2/5)

Allocation Parameters

Maximum Number of Neighbours

• Global value for all cells or value specified for each cell

Maximum Inter-site Distance

2 Allocation Strategies

• Based on distance

• Based on overlapping between coverage areas

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Planning Inter-technology Neighbours (3/5)

Inter-technology Neighbour Automatic Allocation

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Coverage conditions

Overlapping criterion

Calculation options

Do not select the option if

you want to keep existing

neighbours

Start allocation

Planning Inter-technology Neighbours (4/5)

Coverage Conditions

GSM

• BCCH signal level

• Area where the BCCH signal level of the cell is either the highest one or within a margin of the highest

one

UMTS

• Pilot quality (Ec/I0)

• Area where the cell is either the best server in terms of pilot quality or a cell of the active set

LTE

• Reference signal level

• Area where the reference signal level of the cell is either the highest one or within a margin of the

highest one

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Planning Inter-technology Neighbours (5/5)

Allocation Result

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Sort and filtering tools

Commit selected

neighbours only

Allocation results

Summary report listing existing, new

and removed neighbours

Displaying Neighbour Relations on the Map (1/3)

Select the icon in the toolbar and click a transmitter on the map

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Displaying Neighbour Relations on the Map (2/3)

Additional Display Options

Click the icon from the toolbar

Inwards link: site22_3(0) is

neighbour of site9_3(0)

Symmetric link: site10_2(0) is

neighbour of site22_3(0) and

vice-versa

Outwards link: site1_2(0) is

neighbour of site22_3(0)

Direction of the neighbour

relation

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Displaying Neighbour Relations on the Map (3/3)

Possibility to display coverage area of cell’s neighbours according to any neighbour

characteristics on the map

Calculate and display a “coverage by transmitter” on the map

Display neighbour relations of the desired transmitter

Click the icon from the toolbar

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Modifying Neighbour Relations Manually

Possibility to add/remove neighbour relations on the map using the ctrl and shift

shortcuts

Possibility to add/remove neighbours in the transmitter property dialogue

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List of transmitters within a 30 km

radius from the selected one

(sorted in a ascending inter-site

distance order)

Neighbour list of BRU038_G2

Exporting Neighbour Relations

Possibility to Copy/Paste or to Export the List of Neighbours

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THANK YOU!