Atoll-3-1-0-LTE-Light by alifahnuha

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									ATOLL LTE FEATURES
                 Training Programme

                   1. LTE Planning Overview

                  2. Modelling a LTE Network

                          3. LTE Predictions

               4. Frequency and PCI Plan Analysis

               5. Monte-Carlo Based Simulations




© Forsk 2011       Confidential – Do not share without prior permission   Slide 2 of 82
                                              1. LTE Planning Overview

               LTE Features Supported in Atoll



               LTE Workflow in Atoll




© Forsk 2011                              Confidential – Do not share without prior permission   Slide 3 of 82
                                            LTE Features supported in Atoll

               Supports Evolved UTRA (3GPP Release 8 LTE) Networks
                  Various Frequency Bands

                  Scalable Channel Bandwidths

                  Resource Blocks per Channel and Sampling Frequencies

                  Support of TDD and FDD Frame Structures

                  Half-frame/Full-frame Switching Point Periodicities for TDD

                  Normal and Extended Cyclic Prefixes

                  Downlink and Uplink Control Channels and Overheads
                    •   Downlink and uplink reference signals, PSS, SSS, PBCH, PDCCH, PUCCH, etc.


                  RSRP, RSSI and RSRQ Support in predictions and Simulations




© Forsk 2011                                   Confidential – Do not share without prior permission   Slide 4 of 82
                                             LTE Features supported in Atoll

               Supports Evolved UTRA (3GPP Release 8 LTE) Networks
                  Physical Cell IDs Implementation

                  Inter-Cell Interference Coordination Support
                    •   Fractional Frequency Reuse Modelling


                  Support of Fractional Power Control (UL)

                  Support of Directional CPE Antennas

                  Signal Level Based Coverage Planning

                  CINR Based Coverage Planning

                  Possibility of Fixed Subscriber Database for Fixed Applications




© Forsk 2011                                   Confidential – Do not share without prior permission   Slide 5 of 82
                                             LTE Features supported in Atoll

               Supports Evolved UTRA (3GPP Release 8 LTE) Networks
                  Network Capacity Analysis using Monte Carlo Simulations

                  Scheduling and Resource Allocation in Two-dimensional Frames

                  Multiple Input Multiple Output (MIMO) Systems
                    •   Transmit and Receive Diversity
                    •   Single-User MIMO or spatial multiplexing
                    •   Adaptive MIMO Switch (AMS)
                    •   Modelling of Multi-User MIMO (collaborative MIMO – UL only)


                  Tools for Resource Allocation
                    •   Automatic Allocation of Neighbours
                    •   Automatic Allocation of Physical Cell IDs
                                                                                 Specific Module
                    •   Automatic Allocation of Frequencies (AFP)


                  Network Verification Possible using Drive Test Data




© Forsk 2011                                    Confidential – Do not share without prior permission   Slide 6 of 82
                                                            LTE Workflow in Atoll
                                                                       Open an existing project or
                                                                          create a new one


                                                                          Network Configuration
                                                                         - Add network elements                        ACP
                                                                           - Change parameters


                                                                           Basic Predictions
                                                                       (Best Server, Signal Level)


                                                            Automatic or Manual Neighbour Allocation


                                                            Automatic or Manual Frequency Planning


                                                        Automatic or Manual Physical Cell ID Planning


                Traffic Maps
                                          Monte-Carlo                                                   User-defined
                    And/or
                                          Simulations                                                     Values
                                                                                   Cell Load
               Subscriber Lists
                                                                                   Conditions


                                                                            Signal Quality and
                                                                          Throughput Predictions
                             Frequency Plan                                                                        Prediction Study
                                Analysis                                                                               Reports
© Forsk 2011                                     Confidential – Do not share without prior permission                            Slide 7 of 82
                 Training Programme

                   1. LTE Planning Overview

                  2. Modelling a LTE Network

                          3. LTE Predictions

               4. Frequency and PCI Plan Analysis

               5. Monte-Carlo Based Simulations




© Forsk 2011       Confidential – Do not share without prior permission   Slide 8 of 82
                                                2. Modelling a LTE Network

               Global Settings

                   Frequency Band definition

                   Frame Structure Settings


               Radio Parameters

                   Site

                   Transmitters

                   Cells


               Equipment Parameters

                   User-definable reception characteristics




© Forsk 2011                                   Confidential – Do not share without prior permission   Slide 9 of 82
                                                       Global Settings (1/2)

               Frequency Bands
                  Atoll can model multi-band networks within the same document

                  TDD (Time Division Duplexing) or FDD (Frequency Division Duplexing)

                  One frequency band assigned to each cell




© Forsk 2011                               Confidential – Do not share without prior permission   Slide 10 of 82
                                                              Global Settings (2/2)

                                                                      Normal (default) or extended
               LTE Frame Structure definition                       cyclic prefix (No. of SD per slot)
                                                                       e.g.: at 15 kHz, 7 SD/slot        Number of SD for
                                                                    (normal) or 6 SD/slot (extended)     PDCCH (0,1,2 or 3)
                                                                                                         carrying DL and UL
                                                                                                         Resource allocation
                                                                                                             information




                                                                                                         Average number of
                                                                                                         resource blocks for
                                                                                                              PUCCH




                                                                                                          TDD option only :
                                                                                                         Switch from DL to UL
                                                                                                           every half frame
                                                                                                          (default) or every
                   System-level constants (Hard-coded)                                                           frame
                     •   Width of a resource block (180 kHz)
                     •   Frame duration (10 ms)


                   Other control channel overheads defined by 3GPP (calculated based on 3GPP specs)
                     •   Reference signals, PSS, SSS, PBCH, etc.
© Forsk 2011                                      Confidential – Do not share without prior permission                 Slide 11 of 82
                                                  Radio Parameters Overview

               Site
                      X (longitude) and Y (latitude)


               Transmitters                                                                                Presented in
                                                                                                         General Features
                      Activity
                      Antenna configuration (model, height, azimuth, mechanical & electrical tilts...)
                      UL & DL Losses / UL Noise Figure
                      Propagation (Model, Radius and resolution)


               Cells
                      Frequency Band & Channel
                      PCI
                      Power definition
                      Min RSRP
                      UL & DL Load
                      Diversity Support
                      Neighbours




© Forsk 2011                                      Confidential – Do not share without prior permission             Slide 12 of 82
                                        Transmitter Parameters
               Antenna Configuration and Losses                   Cells parameters
                                                                                        Propagation settings
                         parameters                                (see next slide)




                                                                                                        DL and UL
                                                                                                       total losses,
                                                                                                         UL noise
                                                                                                          figure




                                                                                                         Antenna
                                                                                                       Configuration




© Forsk 2011                     Confidential – Do not share without prior permission                          Slide 13 of 82
                                                        Cell Parameters

         Cell’s frequency band
                                                                                                    Cell activity


                                                                                              Channel number in the
     Physical Cell ID + resulting                                                              frequency band (and
   PSS/SSS (and allocation status)                                                               allocation status)


           Power and energy
         offsets from computed
            reference signal
                                                                                              Min RSRP used as cell
                                                                                                  coverage limit



                    DL traffic load
  Load
Conditions     UL noise rise due to
               surrounding mobiles                                                             MIMO Configuration



                                                                                             ICIC and Fractional Power
                                                                                                Control Parameters
         Inputs of the neighbour                                                                    (Advanced)
           allocation algorithm

               Neighbour list




© Forsk 2011                          Confidential – Do not share without prior permission                     Slide 14 of 82
                                              Equipment Parameters (1/2)

               Bearers (Modulation and Coding Schemes) definition
                   User-definable bearer efficiencies
                   (useful bits per resource element)




               Bearer selection thresholds for link adaptation
               Quality indicator graphs
                   BLER used to model the effect of errors in data reception




© Forsk 2011                                  Confidential – Do not share without prior permission   Slide 15 of 82
                                                   Equipment Parameters (2/2)

               Multiple Input Multiple Output Systems
                   Diversity and SU-MIMO gains
                     •   Definable per bearer and antenna configuration
                     •   Depend on the clutter class where users are located




                   MU-MIMO gain
                     •   Definable per cell or
                     •   Calculated during Monte Carlo simulations using intelligent multi-user scheduling on two antenna ports
                         (Layered Space-time Scheduling)

© Forsk 2011                                      Confidential – Do not share without prior permission                       Slide 16 of 82
                 Training Programme

                   1. LTE Planning Overview

                  2. Modelling a LTE Network

                          3. LTE Predictions

               4. Frequency and PCI Plan Analysis

               5. Monte-Carlo Based Simulations




© Forsk 2011       Confidential – Do not share without prior permission   Slide 17 of 82
                                                         3. LTE Predictions

               Introduction



               Parameters used in Predictions



               Prediction Settings



               Fast Link Adaptation Modelling



               Coverage Prediction Examples



               Point Analysis Studies


© Forsk 2011                              Confidential – Do not share without prior permission   Slide 18 of 82
                                                                          Introduction

               Coverage Predictions
                   General Studies based on Downlink Reference Signal Levels
                     •   Best server plot based on downlink reference signal levels
                     •   Multiple server coverage based on downlink reference signal levels
                     •   Reference signal level plots
                     •   Reference signal CNR plots
                     •   RSRP (Average Reference Signal Level Received Power per Subcarrier) plots


                   LTE UL and DL Specific Studies
                     •   SS, PDSCH, PBCH, PDCCH and PUSCH/PUCCH Signal Level Plots
                     •   SS, PDSCH, PBCH, PDCCH and PUSCH/PUCCH CNR Plots
                     •   Quality Studies (RSSI – Received Signal Strength Indicator, RSRQ – Reference Signal Received Quality,
                         Reference Signal, SS, PDSCH, PBCH, PDCCH and PUSCH/PUCCH CINR and interference plots, UL
                         Allocated Bandwidth, UL Transmission Power)
                     •   Best Bearer and Modulation Plots based on PDSCH and PUSCH CINR Levels
                     •   Throughput and Cell Capacity per pixel plots based on PDSCH and PUSCH CINR levels
                             • Peak RLC, Effective RLC, and Application Channel Throughputs
                             • Peak RLC, Effective RLC, and Application Throughputs averaged per User
                             • Peak RLC, Effective RLC, and Application Cell Capacities
                             • Peak RLC, Effective RLC, and Application Aggregate Cell Throughputs
                             • Peak RLC, Effective RLC, and Application Allocated Bandwidth Throughputs (UL)


               Point Predictions
© Forsk 2011                                     Confidential – Do not share without prior permission                    Slide 19 of 82
                                                                            Introduction

               Principles of the studies based on traffic

                   Study calculated for

                     •   Given load conditions
                            • UL noise rise
                            • DL traffic load

                     •   A non-interfering user with
                            • A service
                            • A mobility
                            • A terminal type (in case of a directive antenna , it is oriented towards the serving cell)




© Forsk 2011                                       Confidential – Do not share without prior permission                    Slide 20 of 82
                                                              Load Conditions

               Load conditions are defined in the cells table




                                                                              Values taken into consideration in
                                                                                  predictions for each cell


© Forsk 2011                                Confidential – Do not share without prior permission                   Slide 21 of 82
                                                           Service Properties




               Parameters used in predictions
                   Highest bearers in UL and DL
                   Body loss
                   Application throughput parameters


© Forsk 2011                                Confidential – Do not share without prior permission   Slide 22 of 82
                                                            Mobility Properties




               Parameters used in Predictions
                   Mapping between mobilities and thresholds in bearer and quality indicator determination (as
                   radio conditions depend on user speed).


© Forsk 2011                                 Confidential – Do not share without prior permission            Slide 23 of 82
                                                          Terminal Properties


                                                                                                                             Min & Max
                                                                                                                              Power +
                                                                                                                               Noise
                                                                                                                              Figure +
                                                                                                                              Losses




                                                                                                                             Support
                                                                                                                             of MIMO




                                                                                             Number of Antenna ports in UL
               Parameters used in Predictions                                                  and DL in case of MIMO
                   Minimum & Maximum terminal power                                                    support
                   Gain and losses
                   Noise figure
                   Antenna settings (incl. MIMO support)

© Forsk 2011                                 Confidential – Do not share without prior permission                                Slide 24 of 82
                                                                  Prediction Settings

               Coverage Prediction Plots

                   Standard predictions
                     •   Best server plot

                     •   Coverage by signal level

                     •   Multiple server coverage



                   Reference signal, SS, PDSCH, PBCH, PDCCH and PUSCH/PUCCH signal level and quality
                   predictions
                     •   Selection of a mobility, a service, a terminal (possibly directional antenna oriented towards the serving
                         cell)

                     •   Reference signal, SS, PDSCH, PBCH, PDCCH and PUSCH CNR plots

                     •   RSRP (Average Reference Signal Level Received Power per Subcarrier) plots




© Forsk 2011                                        Confidential – Do not share without prior permission                        Slide 25 of 82
                                                                 Prediction Settings

               Coverage Prediction Plots

                   CINR, Throughput and Quality Indicator predictions
                     •   Based on user-defined cell loads or on Monte-Carlo simulation results

                     •   Selection of a mobility, a service, a terminal (possibly directional antenna oriented towards the serving
                         cell)

                     •   RSSI – Received Signal Strength Indicator and RSRQ – Reference Signal Received Quality

                     •   Reference Signal, SS, PDSCH, PBCH, PDCCH and PUSCH/PUCCH CINR and interference plots

                     •   UL Allocated Bandwidth, UL Transmission Power)

                     •   Best bearer plots based on PDSCH and PUSCH CINR levels

                     •   Throughput and cell capacity per pixel plots based on PDSCH and PUSCH CINR levels
                            • Peak RLC, effective RLC, and application channel throughputs
                            • Peak RLC, effective RLC, and application throughputs averaged per user
                            • Peak RLC, effective RLC, and application cell capacities
                            • Peak RLC, effective RLC, and application aggregate cell throughputs




© Forsk 2011                                       Confidential – Do not share without prior permission                         Slide 26 of 82
                                                Fast Link Adaptation Modelling

                 Atoll determines, on each pixel, the highest bearer that each user can obtain
                      No soft handover
                      Connection to the best server in term of reference signal level (C)
                      Bearer chosen according to the radio conditions (PDSCH and PUSCH CINR levels)



                 Process : prediction done via look-up tables

                                                                                                                  Throughput
                 Reference Signal Level (C)                                                                            &
                        evaluation                                                                     Quality Indicator (BER and BLER)
                                                                                                                   predictions




                                                     Radio Conditions estimation
               Best Server Area determination
                                                     (PDSCH and PUSCH CINR                                    Bearer Selection
                        (min RSRP)
                                                            calculation)




© Forsk 2011                                    Confidential – Do not share without prior permission                                Slide 27 of 82
                                                          Interference Estimation

               Atoll calculates PDSCH and PUSCH CINR according to:
                   The victim traffic (PUSCH or PDSCH) power

                   The interfering signals impacted by:
                     •   The interferers powers
                     •   The path loss from the interferers to the victim
                     •   Antenna gain
                     •   Losses from interferers (incl. Shadowing effect and indoor losses)


                   The interference reduction factor applied to interfering base stations transmitting on adjacent
                   channels (adjacent channel suppression factor)

                   The interference reduction factor due to interfering base stations’ traffic load

                   The interference reduction due to Fractional Frequency Reuse (and consequently the mutual
                   overlap between the channel fractions of the victim and the interfering base stations)




© Forsk 2011                                      Confidential – Do not share without prior permission          Slide 28 of 82
                                Prediction Examples (General Studies)




                                                                                          Number of servers
                                                                                   (Based on reference signal power)




                   Coverage by signal level
               (Based on reference signal power)




© Forsk 2011                            Confidential – Do not share without prior permission                           Slide 29 of 82
                           Prediction Examples (Dedicated Studies)




                                                                                      Coverage by PDSCH CINR
                                                                                     (Directional receiver antenna)




               Coverage by PDSCH CINR
               (Isotropic receiver antenna)




© Forsk 2011                          Confidential – Do not share without prior permission                            Slide 30 of 82
                           Prediction Examples (Dedicated Studies)




                                                                                      Coverage by PUSCH CINR
                                                                                     (Directional receiver antenna)




               Coverage by PUSCH CINR
               (Isotropic receiver antenna)




© Forsk 2011                          Confidential – Do not share without prior permission                            Slide 31 of 82
                                                 Point Analysis Tool: Reception

               Radio Reception Diagnosis at a Given Point : Reception Analysis
                       Choice of UL&DL load conditions :                        Selection of the value to be
                 if (Cells Table) is selected  Analysis based                  displayed (RS, SS, PDSCH,
                 on DL load and UL noise rise from cells table                             RSRP)




                                                                                                                Reference
                                                                                                                 Signals,
                                                                                                               PDSCH and
                                                                                                                 PUSCH
                                                                                                                availability
                                                                                                                 (or not)

            Definition of a user-
             definable “probe"           Cell bar graphs (best
           receiver, indoor or not        server at the top)

                                                                        Analysis detail on
                                                                        reference signals,
                                                                       PDSCH and PUSCH



© Forsk 2011                                       Confidential – Do not share without prior permission               Slide 32 of 82
                                               Point Analysis Tool: Interference

               Radio Interference Diagnosis at a Given Point : Interference Analysis

               Choice of UL&DL load conditions :
       if (Cells Table) is selected  Analysis based on             Selection of the value to be displayed
           DL load and UL noise rise from cells table                    (RS, SS, PDSCH, RSRP)



                                                                                                                                  Serving Cell
                                                                                                                                      (C)




                                                                                                                                 Total Level of
                                                                                                                                  Interference
                                                                                                                                     (I + N)




        Definition of a user-
         definable “probe"                                                                                   List of Interfering Cells
       receiver, indoor or not




© Forsk 2011                                      Confidential – Do not share without prior permission                                   Slide 33 of 82
                 Training Programme

                   1. LTE Planning Overview

                  2. Modelling a LTE Network

                          3. LTE Predictions

               4. Frequency and PCI Plan Analysis

               5. Monte-Carlo Based Simulations




© Forsk 2011       Confidential – Do not share without prior permission   Slide 34 of 82
                                               4. Frequency Plan Analysis

               Channel and Physical Cell ID Search Tools



               Physical Cell ID Allocation Audit



               Physical Cell ID Histograms




© Forsk 2011                                 Confidential – Do not share without prior permission   Slide 35 of 82
                                                         Search Tool Overview

               Tool to visualise channel and PSS ID reuse on the map
                   Possibility to find cells which are assigned a given :
                     •   Frequency band + channel
                     •   Physical Cell ID
                     •   PSS ID
                     •   SSS ID



               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 Edit menu
                   (or directly in the toolbar )




© Forsk 2011                                    Confidential – Do not share without prior permission     Slide 36 of 82
                                                     Channel Search Tool

               Channel Reuse on the Map

   Resource
   Selection


  Frequency
  band and
   Channel
   number




                                                                    Colours given to transmitters
                                                                   • Red: co-channel transmitters
                                                     • Yellow: multi-adjacent channel (-1 and +1) transmitters
                                                            • Green: adjacent channel (-1) transmitters
                                                             • Blue: adjacent channel (+1) transmitters
                                                                 • Grey thin line: other transmitters
© Forsk 2011                              Confidential – Do not share without prior permission                   Slide 37 of 82
                                         Physical Cell ID Search Tool

               Physical Cell ID, PSS ID and SSS ID Reuse on the Map

   Resource
   Selection




   Resource
   Type and
    Value




                                                                       Colours given to transmitters
                                                          • Red or Grey thin line: if the transmitters carries or not
                                                          the specified resource value (Physical Cell ID, PSS ID
                                                                                 or SSS ID)

© Forsk 2011                             Confidential – Do not share without prior permission                           Slide 38 of 82
                                                  PCI Allocation Audit (1/2)

               Verification of the allocation inconsistencies
                   Respect of a minimum reuse distance
                   Respect of neighbourhood constraints (two neighbour cells must have different PCI)
                   Respect of SSS ID allocation strategy




© Forsk 2011                                 Confidential – Do not share without prior permission       Slide 39 of 82
                                                    PCI Allocation Audit (2/2)

               Audit results
                   Inconsistencies are displayed in the default text editor



                                                                                              The minimum distance constraint is fulfilled


                                                                                                  Cells BRU010_L1 & BRU116_L2 are
                                                                                                 Neighbour cells but have been allocated
                                                                                                             the same PCI




                                                                                                These 13 sites do not fulfil the SSS ID
                                                                                                          allocation strategy:
                                                                                              on each site, allocated PCI do not have the
                                                                                                             same SSS ID




© Forsk 2011                                   Confidential – Do not share without prior permission                                        Slide 40 of 82
                                             Physical Cell ID Histograms

               View of the Physical Cell ID Distribution




                                                                                       Dynamic
                                                                                        pointer




© Forsk 2011                                Confidential – Do not share without prior permission   Slide 41 of 82
                 Training Programme

                   1. LTE Planning Overview

                  2. Modelling a LTE Network

                          3. LTE Predictions

               4. Frequency and PCI Plan Analysis

               5. Monte-Carlo Based Simulations




© Forsk 2011       Confidential – Do not share without prior permission   Slide 42 of 82
                                     5. Monte-Carlo Based Simulations

               Traffic modelling

               Monte Carlo Simulations




© Forsk 2011                             Confidential – Do not share without prior permission   Slide 43 of 82
                                          Traffic Modelling (1/2)


     Traffic Data
         Traffic maps and subscriber lists

         Various types of traffic maps:
           •   Raster traffic maps
           •   Vector traffic maps
           •   Live traffic maps
           •   Traffic density maps
                                                               Subscribers

                                                               Live Traffic Data

                                                               Vector Traffic Data
                                                               Raster Traffic Data




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                                             Traffic Modelling (2/2)

     Subscriber Lists
        Lists of subscribers with fixed locations and specific parameters

        Can be created using the mouse or imported from txt and csv files

        Can be displayed on the map according to different parameters

        Main parameters:
          •   Location: X and Y coordinates
          •   Antenna height
          •   Azimuth and tilt (user-defined or calculated)
          •   Serving cell (user-defined or calculated)
          •   User profile
          •   Terminal type


        Prediction calculations can be carried out
        on subscribers (points)
          •   Predicted results include reception levels,
              CINR, throughputs, etc.




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                                  Monte Carlo Simulations (1/3)

     Monte Carlo Simulations
        For studying network capacity

        Network behaviour under given traffic

        Can be based on traffic data from traffic maps
        and subscriber lists

        Distribution of mobile users and services

        Calculation of user parameters (CINR, power control,
        noise rise, resource allocation, etc.)

        Scheduling and radio resource allocation
        based on service priorities and scheduling methods:
          •   Proportional Fair
          •   Proportional Demand
          •   Max Aggregate Throughput




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                                    Monte Carlo Simulations (2/3)

     Simulation Results
        For each cell
          •   UL and DL traffic loads
          •   UL noise rise
          •   UL and DL aggregate cell throughputs
          •   Traffic input and connection statistics
          •   …


        For each mobile
          •   Serving transmitter and cell
          •   Azimuth and tilt (towards the serving cell)
          •   Reference signal, SCH/PBCH, PDSCH, and PUSCH signal levels
          •   Reference signal, SCH/PBCH, PDSCH, and PUSCH CINR and interference levels
          •   Best bearers based on PDSCH and PUSCH CINR levels
          •   Cell throughputs, cell capacities, and user throughputs PDSCH and PUSCH CINR levels
          •   Connection status and rejection cause
          •   …




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                          Monte Carlo Simulations (3/3)


     Simulation Results Display




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THANK YOU!

								
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