Atoll 3.1.2 Gsm Gprs Edge Afp

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ATOLL

AUTOMATIC FREQUENCY PLANNING

FEATURES

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Training Programme

1. Requirements

2. Configuring the Atoll AFP model

3. Running the AFP

4. Analysing the new Frequency Plan

5. Process Summary

(3)

Requirements Overview

Define Transmitters to be allocated and/or taken into account

Focus & Computation zones

Filtering Zones

Active Transmitters

Define Resources

Frequency, BSIC and HSN domains creation

Set Network Parameters

Transmitters Level

(BSIC, Weight, Locking options)

Subcells Level

(Frequency Domain allocation, Required TRXs, Traffic Load, C/I threshold, ...)

TRXs Level

(Locking options)

Neighbour Plan

(4)

Requirements: Resources

Define Transmitters to be allocated and/or taken into account

Focus & Computation zones

• Recommendation: if using both of them, put focus zone within computation zone

Filtered and Active Transmitters

Define Resources

Frequency Domain

BSIC Domain

HSN Domain

(5)

Requirements: Radio Parameters Settings

Set Network Parameters (dealing with AFP)

Transmitters Level

• Weight [AFP tab]

• Locking options [AFP tab]

• BSIC domain allocation [TRXs tab]

Subcells Level

• Frequency Domain Allocation • Excluded channels • Required TRXs • Reception threshold • C/I threshold • Traffic Load • Hopping Mode • Weight

TRXs Level

• Locking options

(6)

Set Transmitters Parameters

BSIC Domain allocation

To define BSICs that can be assigned

Weights

To increase or decrease importance of Transmitters during AFP

Locking options

To keep an existing allocation

Possibility to keep:

• Channel(s) (and MAIO) assigned to TRXs • allocated HSN

• Allocated BSIC

(7)

Set Subcells Parameters (1/3)

A

- Frequency Domain Allocation*

Among the ones defined by users (see slide 4)

B

- Excluded Channels

Channels that cannot be allocated (border coordination for example)

C

- Required TRXs*

Number of “physical” TRXs to be created

D

- DL Traffic Load*

Represents the TRX usage rate (Timeslots used / Timeslots available)

(8)

Set Subcells Parameters (2/3)

F

- C/I Threshold*

Minimum signal quality (if C/I lower than this, then signal is considered as interfered)

G

- % max interference*

Maximum level of interference allowed within each service area

H

- AFP weight

To increase or decrease importance of subcells during AFP

• By default: BCCH weight = 2 and TCH weight = 1

I

- Hopping Mode*

Three modes: Non Hopping OR Base Band Hopping OR Synthesized Frequency Hopping

(9)

Set Subcells Parameters (3/3)

J- Allocation Strategy

The allocation strategy used during manual or automatic frequency planning. There are two

available allocation strategies:

• Free: Any of the channels belonging to the frequency domain can be assigned to TRXs.

• Group Constrained: Each TRX will be assigned one of the groups defined in the frequency domain. You can use the Preferred Frequency Group to define the preferred group of frequencies when using the AFP

K- Max MAL Length

The maximum length of the mobile allocation list (MAL). In other words, the maximum number

of channels allocated to the TRXs of the subcell during Automatic Frequency Planning if the

Hopping Mode is either SFH or BBH

L- HSN domain*

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Requirements: Neighbour Plan (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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Requirements: Interference Matrix (1/3)

Calculation of Interference Matrices

Computation of C/I probabilities between pairs of victim/interferer subcells (for hypothetic

co-channel interferences)

Interference probability defined in % of interfered area or traffic

(13)

Import of Interference Matrices

Loading of ASCII files containing C/I probabilities between pairs of victim/interferer subcells,

coming from OMC statistics or measurement analysis

Requirements: Interference Matrix (2/3)

4 formats supported

• Clc : per pair of subcells, 1 histogram containing the probabilities of having certain values of C/I, formatted in columns (dictionary file .dct mandatory)

• Im0 : per pair of subcells, 1 histogram containing the probabilities of having certain values of C/I, formatted in rows • Im1 : per pair of subcells, 1 histogram containing the probabilities of having certain values of C/I, formatted in columns (no dictionary file needed)

• Im2 : per pair of subcells, 1 Interference Matrix containing the probabilities of having C/I value lower than the min C/I threshold defined in the victim’s subcell.

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Requirements: Interference Matrix (3/3)

Interference Matrices properties

Displays the Interference Matrix scope and statistics

Definition of the interference type

User-defined parameters, set according to the Interference

Matrix type

(Used by the AFP model for the matrix combination)

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Training Programme

1. Requirements

2. Configuring the Atoll AFP model

3. Running the AFP

4. Analysing the new Frequency Plan

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Configuring the Atoll AFP model (1/2)

Overview

Goal and principle of the AFP

• Find optimal allocations that minimise interferences over the network and comply with a set of constraints (separation, frequency domain limitation)

• Convergence criterion based on a cost function

• The AFP model tries to minimise the value of the cost function

Meaning of the Cost Function

• Function that enables to evaluate/compare different Frequency Plans

• Principle of this function is to check for each TRX of the loaded network if its allocated Frequency is “good”.(i.e. if this frequency is not interfered by another TRX of the network and complies with pre-defined separation constraints)

• IF the frequency is NOT GOOD (interfered or separation violation) THEN a cost (penalty) will be assigned to this frequency

• IF the frequency is GOOD (not interfered and fulfil separation rules) THEN the cost (penalty) will be null

• Based on two main components: • States in “Interfered Erlangs”







i i i TRX Violation Separation TRX ce Interferen TRX Total

C

(17)

Configuring the AFP model = Defining how is the Cost calculated

Cost calculation (for a single TRX)

Calculated for the entire loaded network, TRX per TRX

Configuring the Atoll AFP model (2/2)

i i i i i TRX ulation Inter TRX Domain Out Freq TRX TRX Corrupted TRX TRX g Mis TRX

Total

C

sin _

C

_

C

_ _

C

mod

C





i i i i TRX Group eferred Out TRX TRX Modified TRX Violation Separation TRX ce Interferen

C

_

C

_

C

_Pr _

C



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Description of the Cost Function (1/6)

Based on 8 components

1. Cost component due to separation violations

• Estimation for each TRX

• Based on costs specified for the required separations

• Cost of a TRX is limited to 100% of the TRX traffic

• Possibility to weight this cost component among the other components

• Possibility to weight individually each involved TRX according to the violation type within the overall separation violation cost component

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Description of the Cost Function (2/6)

Based on 8 components

2. Cost component due to interference

• Estimation for each TRX

• Interference criterion based on interference matrices

• Possibility to combine matrices coming from different sources (OMC statistics, measurements, planning tool, etc.)

• Interference is considered when the C/I level between pairs of subcells is lower than the victim min C/I threshold

• Distance criterion based on inter-transmitter distance • Weighted according to transmitter azimuths

• Cost of a TRX is limited to 100% of the TRX traffic

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Description of the Cost Function (3/6)

Based on 8 components

3. Cost component due to modified TRXs

• For each modified TRX, a cost is added to the total cost

• Possibility to activate or not this component

• Possibility to modify the cost value

4. Cost component due to TRXs out of their preferred frequency group

• For each TRX allocated out of the preferred frequency group defined in its subcell, a cost is added to the total cost

• Possibility to modify the cost value

(21)

Description of the Cost Function (4/6)

Based on 8 components

5. Cost component due to missing TRXs

• For each missing TRX, a tax is imposed per traffic timeslot and is added to the total cost

• Possibility to modify the tax value

6. Cost component due to TRXs out of their frequency domain

• For each TRX allocated out of the frequency domain defined in its subcell, a tax is imposed per traffic timeslot and is added to the total cost

(22)

Description of the Cost Function (5/6)

Based on 8 components

7. Cost component due to corrupted TRXs

• A TRX is corrupted when:

• More than one frequency is assigned to a non hopping TRX • A TRX in SFH does not have any MAIO

• No channel is assigned to a TRX • …

• For each corrupted TRX, a tax is imposed per traffic timeslot and is added to the total cost

• Possibility to modify the tax value

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Description of the Cost Function (6/6)

Based on 8 components

8. Cost component due to Intermodulation

• This cost component has the goal of avoiding the cases were intermodulation can cause problems.

• The Tax is applied when the combination of allocated frequencies generates a frequency already allocated within the same site.

UL and DL frequencies are evaluated: each ARFCN carrier number refers to 2 physical frequencies: the uplink frequency and the downlink frequency. The translation function from ARFCN to frequency is given by the ARFCN standard.

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Properties of the Atoll AFP Model (1/11)

Description of the Cost tab

Possibility to dismiss TRXs which the cost is lower than

the quality target defined at the subcell level

Cost of violation

separations

• Weight of the cost component • Weight per separation violation type in the next

tab

Cost due to interferences

• Weight of the interference criterion

Costs of missing, out of domain and corrupted

TRXs

• Tax value

• Possibility to consider or not this components

Cost of modified TRXs

• Cost per modified TRX • Possibility to consider or

not this component

Cost of TRXs allocated out of their preferred frequency

group

• Cost per modified TRX • Possibility to consider or

not this component • Preferred groups allocated by the AFP if

pattern are allocated

Optimisation of number of TRXs

• Parameter used with the “Optimised” strategy

Cost due to intermodulation

• Weight of the cost component

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Properties of the Atoll AFP Model (2/11)

Description of the Separations tab

Cost of violation separations • Cost of a separation “k” when a separation “s” is required • Stated in % of interfered traffic

Weight on the separation cost according to the

violation type

• Violation within co-cells • Violation within co-site

transmitters • Violation between

neighbours • Violation within

co-subcells • Violation between exceptional pairs of

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Properties of the Atoll AFP Model (3/11)

Description of the Interference Matrices tab

Matrix combined using weights calculated by

multiplying three components :

• Component quantifying the membership to the AFP

scope (as defined in the properties of each IM)

• Component depending on the Interference Matrix type

Recommendation: do not change those

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Properties of the Atoll AFP Model (4/11)

Description of the Interference Matrices tab

Interference Matrices based on propagation

Basic component weighted by the IM resolution and

the model standard deviation

Interference Matrices based on OMC statistics

Basic component weighted by the duration statistics

were performed

Interference Matrices based on OMC statistics

Basic component weighted by the Interference Matrix

(28)

Properties of the Atoll AFP Model (5/11)

Description of the HSN tab

Possibility to allocate:

– Different HSNs to pairs of subcells which mutually

interfere

– The same HSN to all the subcells of a transmitter or

a site

– HSN freely with respect to directives specified in

the MAL tab (target fractional load and

(29)

Properties of the Atoll AFP Model (6/11)

Description of the MAL tab

Frequency reuse ratio

• Not directly linked to the reuse pattern

• Useful only in case of SFH

• Higher priority than the target fractional load

Fractional Load

• For a set of synchronised subcells sharing the same MAL, HSN and frequency domain

• Useful only in case of SFH

i i MAL the in s frequencie # MAL given a with TRXs # domain the in s frequencie # size MAL

(30)

Properties of the Atoll AFP Model (7/11)

Description of the MAL tab

MAL length (with priority order)

For the “group constrained” assignment mode (only)

– MAL = one of the groups defined in the related

frequency domain

For any other assignment mode

– Allocate the maximum MAL length (specified in the subcell properties) – Adjust the MAL length so

as to fulfil the directives 3, 4 and 5.

– 4. And 5. Directives : target domain use ratio, MAL length strategy and

target fractional load – Taken into account only if

the option “adjust MAL length” is selected – HSN assignment and MAL size determination are

performed so as to obtain the specified targets

MAL allocation type

– Possibility to assign the same MAL or different ones

to all the subcells of a synchronised set – Different MAL is recommended if a typical pattern (e.g. 1x3) has to be

allocated

Parameter which can be automatically calibrated by

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Properties of the Atoll AFP Model (8/11)

Description of the Finalisation tab

Result assignment

– Manual assignment after the allocated frequency plan has been verified by

the user. This allocation may only be partly

committed

– Automatic allocation of the best obtained frequency plan in term of total cost (useful with

auto-save or any automatic procedure run with Atoll

(e.g. Macros)

Target computation time

– Fixed duration : the AFP stops when the

user-defined duration has finished

– Directive duration : the AFP will adapt its method according to this duration.

In the case of large networks or insufficient spectrum, this duration may be exceeded (default

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Properties of the Atoll AFP Model (9/11)

Description of the Reuse tab

Directives on the MAIO spacing

– Staggered: the MAIOs assigned to TRXs of a subcell are evenly spaced

– Free: no constraint

BSIC allocation strategy

– Minimal: the AFP consumes a minimum number of BSICs. The same BSICs will be reused.

– Maximal and homogeneous: the AFP uses as many BSICs as possible. The chosen

BSICs are evenly distributed in the whole

domain.

Pattern allocation

User-defined scheme considered only if the cost

component due to TRXs out of their preferred group

is active and is the pattern option is checked when

running the AFP

Channel spacing

– Automatic (lowest cost) – Maximum spreading

(33)

Properties of the Atoll AFP Model (10/11)

Description of the Protection tab

Interference definition

– Rigid – Intermediate

– Flexible

Additional adjacent channel protection in interference

cost

• None : as defined in Atoll interface (default -18 dB compared to co-channel)

• Weak : + 1.5 dB (e.g. 16.5 dB)

(34)

Properties of the Atoll AFP Model (11/11)

Description of the Advanced tab

Interferer diversity gain (dB)

(Used in case of frequency hopping)

• Models the geographic diversity of interferers

• Considered in the interference and separation

cost components • Depends on the MAL

length

Gain due to low timeslot use ratio (dB)

• Considered or not • Used only in case of interferers supporting DTX

• Considered in the interference cost

component

• Calculated from a formula taking into account the voice activity factor and if

hopping or not

Frequency diversity gain (dB)

(Used in case of frequency hopping)

• Models the gain due to diversity of multi-path

effects • Considered in the

interference cost component only • Depends on the MAL

length

Model experience

• Possibility to keep network learning parameters of the model in

the project

• Possibility to archive this experience in database for

multi-user AFP management

(35)

AFP tuning

Possibility to have several tuned AFP models

After the learning phase of a reference environment, the AFP can tune internal parameters

You can duplicate the AFP model as many times as you wish

(36)

Training Programme

1. Requirements

2. Configuring the Atoll AFP model

3. Running the AFP

4. Analysing the new Frequency Plan

5. Process Summary

(37)

Overview

Possibility to start an AFP on all the transmitters, on a group of transmitters, or on a

single transmitter

Resources that can be allocated

Channels in case of non hopping

Channels and HSNs in case of BBH

MALs, MAIOs and HSNs in case of SFH

BSICs

Step by step initialization

Select involved items (AFP model, resources to be allocated, Interference Matrix, ...)

Define separation constraints

Define locking, traffic load, DTX and reuse distance options

Define Target Computation Time

(38)

Before Starting

Before running the AFP allocation, check:

Zones (Filtering, Computation and Focus) definition

Transmitters & Subcells parameters settings

Save current Frequency Plan (if any) from TRXs table

Neighbours Table not empty

Activate/Deactivate Interference Matrices

(39)

Automatic Frequency Planning Process (1/14)

1

st

_{Step : Involved Items}

Planning of different resources

User-defined strategies

Possibility to allocate AFP indicators

Selected AFP model

Resources to be allocated

Possibility to run specific allocation strategies (depending on the model)

(40)

2

nd

_{Step : Separation Constraints}

Definition of inter-channel separation constraints

• Exceptional pairs

• Co-site, co-cell and neighbours distinction • Traffic and control subcell distinction

Automatic Frequency Planning Process (2/14)

Default separation

rules

Highest priority separation rules (relax or increase the

default separation constraints

(41)

3

rd

_{Step : Advanced AFP Settings}

Selection of the subcell type to be allocated

• Only selected types may have their TRXs created or re-allocated • Other subcells are considered locked for this allocation

Possibility to lock existing TRXs regarding to their TRX type

Traffic load source (user-defined or from the default capture)

Consideration or not of the DTX mode (+ voice activity factor)

Consideration or not of the reuse distance constraint on channels and BSICs

• If available, the AFP takes into account the transmitter reuse distance (optional field to be added to the Transmitters table), Otherwise, it will consider the default reuse distance

(42)

3

rd

_{Step : Advanced AFP Settings}

Automatic Frequency Planning Process (3/14)

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Automatic Frequency Planning Process (4/14)

4

th

_{Step : Loading and Checking The Network}

Network loading

• The transmitters to be allocated : “TBA” transmitters

• Active and filtered transmitters which belong to the transmitters folder for which the AFP was launched and to the focus zone (if existing or otherwise to the computation zone) as well

• The potential interferers with TBA transmitters if the option “load all interferers propagating in the focus zone” (or in the computation zone if not defined)

• The transmitters involved in the specified separation conditions with TBA transmitters

• Neighbours, co-site transmitters, transmitters or subcells of exceptional pairs, neighbours of neighbours in case of BSIC allocation

(44)

Automatic Frequency Planning Process (5/14)

5

th

_{Step : Last Settings Before Starting AFP}

The strategy used by the AFP model depends on the

specified time The path to a solution is

initialised by a seed number

Network consistency checking • Non-blocking warnings : values out of range, inconsistencies of the

existing allocation

• Blocking errors : empty domains

Event viewer

(45)

Automatic Frequency Planning Process (6/14)

6

th

_{Step : Verifying AFP Progress}

AFP progress dialogue – General tab

AFP time progress

AFP real time cost evolution

(46)

Automatic Frequency Planning Process (7/14)

6

th

_{Step : Verifying AFP Progress}

AFP progress dialogue – Quality Indicators tab

Costs and components of all the solutions having improved

(47)

6

th

_{Step : Verifying AFP Progress}

AFP progress dialogue – Distributions tab

Automatic Frequency Planning Process (8/14)

Initial and best cost distributions of frequencies

Initial and best usages of frequencies

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Automatic Frequency Planning Process (9/14)

7

th

_{Step : Analysing Allocation Results}

AFP output dialogue : Summary tab

Initial and final AFP cost given in term of correctly served traffic (Total traffic – Total cost)

AFP Time information

Costs and components of all the solutions having improved

(49)

7

th

_{Step : Analysing Allocation Results}

AFP output dialogue : Allocation tab

Automatic Frequency Planning Process (10/14)

Possibility to resume or assign AFP Allocation Result Grid Event Viewer AFP results options

(50)

7

th

_{Step : Analysing Allocation Results}

AFP output dialogue : results grid of the allocation tab

Automatic Frequency Planning Process (11/14)

Resource coloured according to its allocation status

Information on separation violation

Possibility to delete or keep existing/initial allocation Allocated resources

(51)

Automatic Frequency Planning Process (12/14)

7

th

_{Step : Analysing Allocation Results}

AFP output dialogue : result options of the allocation tab

Information to be displayed in the allocation grid Reset plan to previous one

Export results in text files Deletion of TRXs violating

(52)

7

th

_{Step : Analysing Allocation Results}

AFP output dialogue : Subcells tab

Automatic Frequency Planning Process (13/14)

Cost components and AFP indicators (possibly depending on the selected

strategy when having run the AFP) before and after

the allocation

(53)

7

th

_{Step : Analysing Allocation Results}

AFP output dialogue : Distributions tab

Automatic Frequency Planning Process (14/14)

Initial and final cost distributions of frequencies

Initial and final usages of frequencies

(54)

Training Programme

1. Requirements

2. Configuring the Atoll AFP model

3. Running the AFP

4. Analysing the new Frequency Plan

5. Process Summary

(55)

Analysing a new Frequency Plan

Interactive Frequency Planning

And also...

Find on Map Tool

Channels distribution histogram

Interference Predictions

(56)

Interactive Frequency Planning Overview

Aim : verify the current frequency allocation

For each single transmitter

• Interactively propose alternative solutions to the current allocation • Addition of new TRXs by selecting the most appropriate channel(s)

Selection of an available AFP model

Use of an AFP license

Use of the settings of the selected AFP model

Use of the active Interference Matrices

AFP : selection of channels according to the lowest overall cost over all the network

IFP : selection of channels according to the lowest cost obtained on the selected transmitter

Powerful graphic user interface

Variable thickness arrows to each interfered or interfering transmitter

Thickness defined according to interference probability

Possibility to filter transmitters according to their contribution to the AFP cost

(57)

Allocation and Channel Analysis (1/5)

IFP running command on the selected subcell Selection of a transmitter and a TRX type Selection of an AFP model AFP properties, settings and related tables

(58)

Allocation and Channel Analysis (2/5)

Selected subcell actual allocation Alternative allocations and associated cost Filtering according to components and probabilities AFP cost components and indicators

(59)

Allocation and Channel Analysis (3/5)

Selected subcell actual allocation Alternative allocations and associated cost AFP cost components and indicators Filtering according to components and probabilities

(60)

Allocation and Channel Analysis (4/5)

Selection of an alternative channel

Commit of the new channel allocation

(61)

Allocation and Channel Analysis (5/5)

Selection of a different subcell Case of 1 missing TRX Commit of the TRX Selection of the channel to

be assigned to the new TRX

(62)

Interference Matrix Analysis

Using the same interface, possibility

to analyse the IM probabilities for a

given subcell

Analysis in case the selected subcell is

either victim or interferer

Probability given for co-channel or adjacent channel interferences Victim or interferer filtering Interference probabilities

(63)

Network Consistency Checking

Tool to check the consistency of a network

Recommended after an automatic or manual allocation

Available by selecting frequency plan and audit… in the transmitters folder context menu

Consistency checking performed on

The active and filtered transmitters which belong to the transmitters folder for which the audit

was launched and to the focus zone (if existing or otherwise to the computation zone) as well

:“TBA” transmitters

The potential interferers with TBA transmitters if the option “load all interferers propagating in

the focus zone” (or in the computation zone if not defined)

The transmitters involved in the specified separation conditions with TBA transmitters

(neighbours, co-site transmitters, transmitters or subcells of exceptional pairs, neighbours of

neighbours in case of BSIC allocation)

Systematic checking

Unique BCCH TRX per transmitter, consistency TRXs/cell types, …

(64)

Find On Map Tool (1/4)

Tool to visualise channel and BSIC reuse on the map

Possibility to find transmitters which are assigned a given :

• Channel (of a specified type – broadcast or not) • BCCH-BSIC pairs

• HSNs • MAIOs

• Any combination of any resource

Possibility to generate a report listing all the transmitters that use the searched channel

(co-channel) and its adjacent channels

Possibility to generate a report listing all the transmitters that use the searched (BSIC-BCCH)

pair

Possibility to generate a report listing all the transmitters that use the searched

(Channel-HSN) pair

Way to use this tool

Create and calculate a coverage by transmitter with a colour display by transmitter

Open the Find on Map tool available in the toolbar

(65)

Find On Map Tool (2/4)

Channel Reuse on the Map

Select the “GSM Channel” option

Colours given to transmitters • Red: co-channel transmitters

• Orange: co-channel transmitters and different subcell • Yellow: multi-adjacent channel (-1 and +1) transmitters

Search type

Search options

(66)

BSIC-BCCH Reuse on the Map

Select the “BSIC-BCCH Pair” option

Find On Map Tool (3/4)

Colours given to transmitters • Red : searched transmitters • Grey : others

Search type

Search options (BSIC given in value

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Channel-HSN Reuse on the Map

Find On Map Tool (4/4)

Search type

Search options

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Frequency Histograms

Display of the Frequency Distribution

Available by selecting frequency plan and channel distribution… in the transmitters folder

context menu

(69)

Interference Predictions (1/5)

Interference Condition

Interference studied on a TRX type (or All)

Calculation of C/I and comparison with upper and lower thresholds

• Subcell or user-defined C/I thresholds

Optional Interference Computations

• Consideration or not of the receiver noise N (or user-defined value) • Consideration of C/I levels satisfied by at least one TRX or the worst one • Possibility to evaluate interference level on a specific channel

• Separated study of the contribution of co and/or adjacent channels, external sources of interferences (e.g. UMTS network)

• Modelling of the DTX with a voice activity factor • Consideration of the traffic load per subcell • Detailed results

• NH : per TRX type

• BBH : per TRX type and MAL

• SFH : per TRX type and MAL-MAIO

Colouring depending on attributes

(70)

Interference Predictions (2/5)

Coverage by C/I Level Prediction

Global analysis of the network quality

Filter the useful signal

Filter C/I values

Interference calculation options

(71)

Coverage by C/I Level Prediction

Interference Predictions (3/5)

Overlapping zones with a lower quality

(72)

Interference Predictions (4/5)

Interfered Zones Prediction

Areas where a Rx is interfered

Interference calculation options

Filter the useful signal

Filter C/I values

Threshold under which interferences are

(73)

Interference Predictions (5/5)

Interfered Zones Prediction

Areas where the receiver is interfered (where the C/I is lower

than the user-defined threshold) on the HCS server areas

(74)

Point Interference Analysis (1/3)

Interference Window of Point Analysis Tool

Selection of potentially interfered transmitter

Indoor reception or not (receiver located indoor)

Filter on interfered TRX type (or all)

Filter on interferers

• Possibility to consider any combination of co-channel, adjacent channel or external interferences (e.g. UMTS network)

Possibility to consider or not the receiver noise N

Analysis

• NH : per TRX type

• BBH : per TRX type and MAL

• SFH : per TRX type and MAL-MAIO

Std deviation type (model or C/I) + Cell Edge Coverage Probability

Reduction factor on signal and interference levels represented by partly filled bars

• Interfered reception bar: reduction due to power offset

• Interferer reception bars: reduction due to power offset, adjacent channel protection level, fractional load, mean power control

Display on the map of interferers and related contributions to total interference

• Differentiation between co-channel and adjacent channel interferers

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Point Interference Analysis (2/3)

Interference Tab in Point Analysis Window

Display of co-channel interference Signal level (C) of the potential victim at the receiver

Resulting C/I or C/I+N value Studied transmitter, subcell and TRX Received noise (I) from surrounding co- and adjacent channels at the receiver Interference area based on C/I conditions _{Display of} adjacent channel interference Interference types

(76)

Confidential – Do not share without prior permission

Details Tab in Point Analysis Window

Point Interference Analysis (3/3)

Signal level and interference level for each received transmitter on the receiver location © Forsk 2012 Slide 76 of 79 Interference area based on C/I conditions

(77)

Training Programme

1. Requirements

2. Configuring the Atoll AFP model

3. Running the AFP

4. Analysing the new Frequency Plan

(78)