U-Net Simulation Principle and Flow 1.0
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Transcript of U-Net Simulation Principle and Flow 1.0
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Huawei GENEX SeriesHuawei GENEX Series
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GENEX Overview
GENEX U-Net Features
How to Use U-Net to Plan a Network
Contents
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GENEXGENEX --- ---
Our Aim ------ Generate Excellent
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RNCRNC
GENEX U-NetGENEX U-Net Radio Network Planning Radio Network Planning ToolTool
Downlink Downlink + + UplinkUplink
GENEX ProbeGENEX ProbeGENEX AssistantGENEX AssistantTest & Post-Process ToolsTest & Post-Process Tools
GENEX NastarGENEX NastarNetwork Performance Analysis Network Performance Analysis SystemSystem
GENEX U-Net is a radio planning tool that fully supports the technologies of GSM,GPRS-EDGE, CDMA IS95, WCDMA/UMTS/HSDPA, CDMA 2000/1xRTT/1xEVDO, and TD-SCDMA wireless networks.
The GENEX Probe, network optimization and drive test data collection system, is an air interface test tool for WCDMA/HSDPA/GSM/GPRS networks. GENEX Assistant is a professional wireless test data post-processing software system.
GENEX Nastar is a platform for monitoring and optimizing the performance of GSM/CDMA/WCDMA wireless networks
Huawei GENEX Family
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GENEX Overview
GENEX U-Net Function
How to Use U-Net to Plan a Network
Contents
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Pre-planning module
Network dimensioni
ng
U-Net Basic Module - required(including GSM network planning and prediction)
Measurements module
Test Mobile dataCW test dataPropagation
model tuning
AFP Module
Automatic
Frequency
Planning
DT Module
2G DT data for
coverage prediction
2G DT data for
propagation model tuning
MicroWave
Module
Microwave manageme
nt & analysis
3G module
Prediction and
simulation for WCDMA
& CDMA2000 /1xRTT /EV-
DO
Modules
Network Planning Coverage Calculation Interference Prediction
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GENEX Overview
GENEX U-Net Features
How to Use U-Net to Plan a Network
Contents
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Work Flow
Geographic data
Radio Network data
Resource data
U-net Prediction
Coverage Study Interference Study
Calibrate Propagation Model (optional)
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Input Data
Geo data - digital map
Radio Network data
Resource data
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Building project
Defining Coordinate System
Managing geographic data
Calibrate Propagation Model
File/New/project templates/GSM GPRS EGPRS
Tools/Options/Coordinates/Projection
File/Import/map/clutter/index/clutter classes
File/Import/map/height/index/altitudes
File/Import/map/vector/index/vector
Explorer/Modules/Propagation
Modules/(SPM)/Duplicate&Properties
Step by Step
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Explorer/Data/Transmitters/Calculate
Explorer/Data/Transmitters/Neighbours
Explorer/Data/Transmitters/Interference Matrices
Explorer/Data/Transmitters/Frequency plan
Managing radio network data
Explorer/Data/Sites/New & Open table
Explorer/Data/Transmitters/(Properties/Station
templates) & New & Open table
Explorer/Data/Transmitters/Network settings&
Subcells
Explorer/Data/Antennas/New
File/Import/File of type:
Planet?database/Antennas/index
Planning and Prediction
Step by Step
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Projection (Primary) Coordinate System:
It is a coordinate system of geographical database which depends on the imported geographic file. (Usually, projection system can be found in Projection file in DTM map directory).
Display Coordinate System:
it is a coordinate system for display and data-input. All the geographical coordinates are displayed and input according to this system. If the projection coordinate system and the display coordinate system do not match with each other, U-Net will adjust them.
U-Net works with the following two coordinate systems at the same time:
Selecting Coordinate System
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Propagation Model
Model Frequency band Take into account Required settings Recommended use
Longley-Rice (theoretical) 300MHz-3000MHzTerrain profile
ReflectionCalibration
- Flat areas- Very low frequencies
ITU 370-7 Vienna 93100 MHz – 400
MHz- Terrain profile
Percentage time while real field > calculated field
- Long distances (d>10km)- Low frequencies
ITU 526-5 (theoretical) 30 - 10.000 MHz- Terrain profile
- Diffraction (3 knife-edge Deygout method)
Fixed receivers
WLL 30 - 10.000 MHz
- Terrain profile- Deterministic clutter
- Diffraction (3 knife-edge Deygout method)
- Free space loss- Receiver height and clearance per clutter
Fixed receivers> Microwave links
Okumura-Hata 150 - 1.000 MHz
- Terrain profile- Statistical clutter (at the
receiver)- 1 formula per clutter
- Reflection
- With diffraction or not- Urban loss + correction a(Hr
)
1 < d < 20 km> GSM 900
> CDMA/ CDMA2000
Cost-Hata 1.500 - 2.000 MHz
- Terrain profile- Statistical clutter (at the
receiver)- 1 formula per clutter
- Reflection
- With diffraction or not- Urban loss + correction a(Hr
)
1 < d < 20 km> GSM 1800
> UMTS
Standard Propagation Model
150 - 2.000 MHz- Terrain profile
- Statistical clutter- Effective antenna height
- With diffraction weight- K1, ..., K6 (single formula)
- LOS or NLOS differentiation- Loss per clutter with clutter
weighting- Receiver clearance
1 < d < 20 km> GSM 900> GSM 1800
> UMTS> CDMA/CDMA2000(Automatic calibration
available)
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Standard Propagation Model (SPM )
L=K1 + K2log(d) + K3log(HTxeff) + K4×Diffraction loss + K5log(d)×log(HTxeff) + K6(HRxeff) + Kclutter×f(clutter)
K1: Constant offset (dB)K2: Multiplying factor for log(d) d: Distance between the receiver and the transmitter (m)K3: Multiplying factor for log(HTxeff)HTxeff: Effective height of the transmitter antenna (m)K4: Multiplying factor for diffraction calculation. K4 has to be a positive numberDiffraction loss: Losses due to diffraction over an obstructed path (dB)K5: Multiplying factor for log(HTxeff)log(d)K6: Multiplying factor for HRxeffHRxeff: Mobile antenna height (m)Kclutter: Multiplying factor for f(clutter).f(clutter): Average of weighted losses due to clutter
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Radio Network Data
Horizontal Pattern Vertical Pattern
Other Properties: Manufacturer, Gain (dBi), Beamwidth, Frequency
Antenna information
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SitesA site is a geographical point where one or several transmitters (multi-sector site or station) equipped with antennas with particular characteristics are located.
Radio Network Data
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TransmittersA transmitter is the source or generator of any signal on a transmission medium. A transmitter is a piece of equipment composed of some antennas located on a site.
Radio Network Data
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Transmitter Equipment Parameters
U-Net provides two ways to calculate transmission/reception losses:• Use losses of TMA and feeder to calculate• Directly set in Transmitters table
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Predictions without Simulation
Coverage by transmitter: Display the best server coverage
Coverage by signal level: Display the signal level across the studied area
Overlapping zones: Display the signal level across the studied area
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Computation Zone
Usually, Computation Zone needs to be drawn before predictions.
Combine:
Delete:
Specially,• The computation zone may consist of several polygons. Draw a first polygon or select the existing zone on the map, then select the Combine tool of the Vector Edition bar and draw another polygon.• The computation zone may be holed. Draw a polygon or select the existing zone on the map, then select the Delete tool of the Vector Edition bar and delete the part you want to remove from the polygon.
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Neighbours Automatic Allocation
•Intra-frequency
•Inter-frequency
•Inter-RAT
Display neighbors on map
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Force co-site cells as neighbors: force co-site cells to be taken into account.
Force adjacent cells as neighbors: force adjacent cells to be neighbours.
Force symmetry: force neighbor symmetry.
Force exceptional pairs: force the constraints defined for exceptional pairs.
Reset neighbors: start the automatic allocation from scratch. Coverage conditions: eg. Signal Level, Ec/Io, coverage probability etc.
% min covered area: minimum percentage between the overlapping zone and the studied cell coverage area.
Neighbours Automatic Allocation
Max Number of Neighbors : usually 32.
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Point Analysis
Live Computation (without considering path loss matrix).
Path Profile
Diffraction Diffraction LossLoss
Diffraction peak (different Diffraction peak (different propagation modules have propagation modules have
different peaks). different peaks).
the angle of the LOS read in the antenna
vertical pattern
LOSLOS
Estimated Estimated shadow shadow marginsmargins
Distance Distance between between Tx-Rx Tx-Rx
Modules Modules used used
Signal Level at Signal Level at the receiver’s the receiver’s
endendStudied transmitters Studied transmitters
and repeatersand repeaters
10GHz 10GHz ellipseellipse
DTMDTM
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Point Analysis
Radio reception diagnosis for a given point
Choose an existing Choose an existing simulation and check its simulation and check its
load conditions on UL load conditions on UL and DL. and DL.
Definition of user-Definition of user-definable “probe” definable “probe”
receiverreceiver
Analysis of specific Analysis of specific carrier or all carriers carrier or all carriers
(Carriers are (Carriers are considered as sets considered as sets in site equipment).in site equipment).
Availability of Availability of traffic on UL traffic on UL
and DLand DLCells in mobile Cells in mobile active set active set (grey area)(grey area)
Cells outside Cells outside active set active set
(white area)(white area)
Threshold for best server Threshold for best server that becomes part of active that becomes part of active set. (It varies with different set. (It varies with different
mobility types)mobility types)
Active set Active set threshold (best pilot threshold (best pilot quality - active set quality - active set
threshold)threshold)
Availability of Availability of PilotPilot
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