This document provides an overview presentation of the Mobile-CDS software tool for simulating 4G/5G wireless networks. The key points are:
1. Mobile-CDS is a 3D ray-tracing propagation tool that allows simulation of wireless networks in urban and rural environments for applications such as RF characterization and protocol evaluation.
2. It has components for computational simulation, wireless protocols, 3D databases of terrain/objects, material properties, antennas, and analysis/post-processing of simulation results.
3. The presentation provides details on some of these components, such as the computational engine, protocol toolbox, 3D database toolbox, antennas toolbox, and analysis capabilities for coverage, delay, throughput, and interference
2. 2
TABLE OF CONTENT
1. Introduction to Mobile-CDS.
2. Tool componentsdiagram.
3. Computational engine description.
4. Protocols toolbox.
5. 3D databases toolbox.
6. Material properties.
7. Antennatoolbox.
8. Analysis/post-processing toolbox.
9. Simulation results.
3. 3
INTRODUCTION
Mobile-CDS is a 3D deterministic propagation tool with unlimited potential in areas
such as; RF characterization of specific regions, wireless protocol evaluation and
military applications. Its internal engine is based on ray-tracing technology and the
code is fully parallelized, specially designed for 4G/5G Simulation (e.g. LTE)
From the comfort of his or her office, using Mobile-CDS the wireless system
engineer is able to change several simulation parameters (i.e., the TX and RX
antenna height and gain patterns, the carrier frequency, material properties,
propagation environment, etc.) and determine their impact on the received signal.
Product design cycle time is greatly reduced and money is saved by avoiding
expensive and time consuming field data collection campaigns. Field data is only
gathered at the end of the design cycle for verification purposes.
During the next hour detailed characteristics of the tool and some of its capabilities
will be presented. We hope that during this time you all enjoy the presentation and
if there are questions, feel free to ask.
5. COMPUTATIONAL ENGINE
The computational window is used to initialize
some of the propagation parameters needed to
run the program. These include:
o The number of transmitted wavefronts.
o The number of bounces before a wavefront is
terminated.
o The propagation modes (LOS, reflection and
transmissions and diffraction).
o Outdoors only (faster) or both outdoor and
indoor.
Figure 2
6. WIRELESS PROTOCOL TOOLBOX
The wireless protocol toolbox includes
both, hardcoded and user defined protocols
specifications. The program uses the
protocol specifications in order to estimate
data rate and throughput statistics in the
simulated region.
Figure 3
7. 3D DATABASES TOOLBOX
Mobile-CDS includes a state of the art
3D databases toolbox. It allows the user
to perform the following operations:
o Import 3D databases in one of the
following formats; Facet, KML and
TIN.
o Combine terrain and 3D objects
(buildings, vehicles, trees, etc.).
o Crop a section of the 3D databases.
o Assign different electrical
properties to different objects
included in the databases.
o Delete specific objects.
o Duplicate databases
Figure 4
Selected
Buildings
Cars
Included
8. ANTENNAS TOOLBOX
Mobile-CDS uses 3D antenna patterns
in all of its simulations. The patterns
are specified in term of their complex Eq
and Efelectric field components. This
allows the program to track both, the
magnitude and the phase of the signal
as it propagates through the
environment. Patterns generated by
antenna manufacturers, measured in an
anechoic chamber or generated using
an electromagnetic solver such as
XFDTD, can easily by converted into
.ant format and use in the simulation in
order to produce more accurate results.
Figure 6
Importedhead and hand
measurements at 1.8 GHz
Ideal half-wave dipole
9. ANALYSIS/POST-PROCESSING TOOLBOX
Figure 7
Mobile-CDS includes an analysis
engine, which allow it to carry out
several post-processing functions on
the simulation data generated. These
are just a few:
o RF coverage.
o RMS-Delay estimates.
o Throughput calculations.
o Interference analysis.
In addition, the program outputs the
results in an enhanced file format,
which allows the system engineer to
post-process the data using one of
several scripting languages such as
Matlab or Python.
Receivers On
Vertical Plane
Receivers On
Horizontal Plane
Receivers Along High
Resolution Linear Path
10. SIMULATION RESULTS
(LTE THROUGHPUT)
Figure 8Receivers On
Horizontal Plane
Base Station
Parameter Value
Wireless Protocol LTE
TX frequency (MHz) 2110
TX total average power (dBm) 44.8
Htx (meters) 15
TX antenna pattern
18.0 dBi, 4-sector 60
degrees pattern
TX Losses 6.0 dB
Hrx (meters) 2.0
RX antenna pattern Ideal half-wave dipole
RX antenna efficiency (%) 50
Diversity gain (dB) 3
LTE Throughput Simulation Parameters