author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Sat, 04 Jul 2009 08:15:48 +0200 | |
changeset 4654 | 2eaebe77d66b |
parent 4465 | de0995fde236 |
permissions | -rw-r--r-- |
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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2008 Timo Bingmann |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation; |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* Author: Timo Bingmann <timo.bingmann@student.kit.edu> |
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*/ |
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|
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#include "ns3/propagation-loss-model.h" |
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#include "ns3/jakes-propagation-loss-model.h" |
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#include "ns3/constant-position-mobility-model.h" |
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#include "ns3/config.h" |
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#include "ns3/string.h" |
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#include "ns3/boolean.h" |
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#include "ns3/double.h" |
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#include "ns3/gnuplot.h" |
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#include "ns3/simulator.h" |
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#include <map> |
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using namespace ns3; |
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/// Round a double number to the given precision. e.g. dround(0.234, 0.1) = 0.2 |
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/// and dround(0.257, 0.1) = 0.3 |
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static double dround(double number, double precision) |
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{ |
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number /= precision; |
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if (number >= 0) |
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{ |
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number = floor(number + 0.5); |
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} |
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else |
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{ |
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number = ceil(number - 0.5); |
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} |
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number *= precision; |
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return number; |
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} |
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static Gnuplot |
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TestDeterministic (Ptr<PropagationLossModel> model) |
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{ |
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Ptr<ConstantPositionMobilityModel> a = CreateObject<ConstantPositionMobilityModel> (); |
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Ptr<ConstantPositionMobilityModel> b = CreateObject<ConstantPositionMobilityModel> (); |
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Gnuplot plot; |
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plot.AppendExtra("set xlabel 'Distance'"); |
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plot.AppendExtra("set ylabel 'rxPower (dBm)'"); |
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plot.AppendExtra("set key top right"); |
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double txPowerDbm = +20; // dBm |
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Gnuplot2dDataset dataset; |
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dataset.SetStyle(Gnuplot2dDataset::LINES); |
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{ |
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a->SetPosition (Vector (0.0, 0.0, 0.0)); |
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for (double distance = 0.0; distance < 2500.0; distance += 10.0) |
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{ |
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b->SetPosition (Vector (distance, 0.0, 0.0)); |
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// CalcRxPower() returns dBm. |
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double rxPowerDbm = model->CalcRxPower (txPowerDbm, a, b); |
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dataset.Add(distance, rxPowerDbm); |
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Simulator::Stop (Seconds (1.0)); |
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Simulator::Run (); |
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} |
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} |
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std::ostringstream os; |
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os << "txPower " << txPowerDbm << "dBm"; |
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dataset.SetTitle(os.str()); |
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plot.AddDataset(dataset); |
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plot.AddDataset( Gnuplot2dFunction("-94 dBm CSThreshold", "-94.0") ); |
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return plot; |
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} |
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static Gnuplot |
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TestProbabilistic (Ptr<PropagationLossModel> model, unsigned int samples = 100000) |
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{ |
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Ptr<ConstantPositionMobilityModel> a = CreateObject<ConstantPositionMobilityModel> (); |
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Ptr<ConstantPositionMobilityModel> b = CreateObject<ConstantPositionMobilityModel> (); |
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Gnuplot plot; |
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plot.AppendExtra("set xlabel 'Distance'"); |
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plot.AppendExtra("set ylabel 'rxPower (dBm)'"); |
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plot.AppendExtra("set zlabel 'Probability' offset 0,+10"); |
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plot.AppendExtra("set view 50, 120, 1.0, 1.0"); |
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plot.AppendExtra("set key top right"); |
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plot.AppendExtra("set ticslevel 0"); |
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plot.AppendExtra("set xtics offset -0.5,0"); |
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plot.AppendExtra("set ytics offset 0,-0.5"); |
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plot.AppendExtra("set xrange [100:]"); |
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double txPowerDbm = +20; // dBm |
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Gnuplot3dDataset dataset; |
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dataset.SetStyle("with linespoints"); |
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dataset.SetExtra("pointtype 3 pointsize 0.5"); |
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typedef std::map<double, unsigned int> rxPowerMapType; |
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// Take given number of samples from CalcRxPower() and show probability |
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// density for discrete distances. |
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{ |
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a->SetPosition (Vector (0.0, 0.0, 0.0)); |
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for (double distance = 100.0; distance < 2500.0; distance += 100.0) |
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{ |
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b->SetPosition (Vector (distance, 0.0, 0.0)); |
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rxPowerMapType rxPowerMap; |
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for (unsigned int samp = 0; samp < samples; ++samp) |
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{ |
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// CalcRxPower() returns dBm. |
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double rxPowerDbm = model->CalcRxPower (txPowerDbm, a, b); |
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rxPowerDbm = dround(rxPowerDbm, 1.0); |
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rxPowerMap[ rxPowerDbm ] ++; |
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Simulator::Stop (Seconds (0.01)); |
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Simulator::Run (); |
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} |
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for (rxPowerMapType::const_iterator i = rxPowerMap.begin(); |
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i != rxPowerMap.end(); ++i) |
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{ |
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dataset.Add(distance, i->first, (double)i->second / (double)samples); |
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} |
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dataset.AddEmptyLine(); |
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} |
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} |
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std::ostringstream os; |
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os << "txPower " << txPowerDbm << "dBm"; |
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dataset.SetTitle(os.str()); |
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plot.AddDataset(dataset); |
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|
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return plot; |
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} |
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|
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static Gnuplot |
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TestDeterministicByTime (Ptr<PropagationLossModel> model, |
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Time timeStep = Seconds(0.001), |
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Time timeTotal = Seconds(1.0), |
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double distance = 100.0) |
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{ |
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Ptr<ConstantPositionMobilityModel> a = CreateObject<ConstantPositionMobilityModel> (); |
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Ptr<ConstantPositionMobilityModel> b = CreateObject<ConstantPositionMobilityModel> (); |
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|
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Gnuplot plot; |
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|
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plot.AppendExtra("set xlabel 'Time (s)'"); |
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plot.AppendExtra("set ylabel 'rxPower (dBm)'"); |
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plot.AppendExtra("set key center right"); |
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|
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double txPowerDbm = +20; // dBm |
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|
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Gnuplot2dDataset dataset; |
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|
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dataset.SetStyle(Gnuplot2dDataset::LINES); |
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|
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{ |
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a->SetPosition (Vector (0.0, 0.0, 0.0)); |
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b->SetPosition (Vector (distance, 0.0, 0.0)); |
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|
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Time start = Simulator::Now(); |
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while( Simulator::Now() < start + timeTotal ) |
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{ |
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// CalcRxPower() returns dBm. |
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double rxPowerDbm = model->CalcRxPower (txPowerDbm, a, b); |
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198 |
|
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Time elapsed = Simulator::Now() - start; |
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dataset.Add(elapsed.GetSeconds(), rxPowerDbm); |
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201 |
|
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Simulator::Stop (timeStep); |
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Simulator::Run (); |
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204 |
} |
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} |
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|
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std::ostringstream os; |
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os << "txPower " << txPowerDbm << "dBm"; |
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dataset.SetTitle(os.str()); |
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210 |
|
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plot.AddDataset(dataset); |
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212 |
|
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plot.AddDataset( Gnuplot2dFunction("-94 dBm CSThreshold", "-94.0") ); |
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|
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return plot; |
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216 |
} |
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217 |
|
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int main (int argc, char *argv[]) |
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{ |
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GnuplotCollection gnuplots("main-propagation-loss.pdf"); |
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221 |
|
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222 |
{ |
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Ptr<FriisPropagationLossModel> friis = CreateObject<FriisPropagationLossModel> (); |
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224 |
|
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Gnuplot plot = TestDeterministic(friis); |
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plot.SetTitle("ns3::FriisPropagationLossModel (Default Parameters)"); |
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gnuplots.AddPlot(plot); |
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228 |
} |
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229 |
|
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230 |
{ |
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Ptr<LogDistancePropagationLossModel> log = CreateObject<LogDistancePropagationLossModel> (); |
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log->SetAttribute("Exponent", DoubleValue (2.5)); |
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233 |
|
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Gnuplot plot = TestDeterministic(log); |
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plot.SetTitle("ns3::LogDistancePropagationLossModel (Exponent = 2.5)"); |
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gnuplots.AddPlot(plot); |
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237 |
} |
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238 |
|
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239 |
{ |
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Ptr<RandomPropagationLossModel> random = CreateObject<RandomPropagationLossModel> (); |
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random->SetAttribute("Variable", RandomVariableValue(ExponentialVariable(50.0))); |
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242 |
|
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243 |
Gnuplot plot = TestDeterministic(random); |
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plot.SetTitle("ns3::RandomPropagationLossModel with Exponential Distribution"); |
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gnuplots.AddPlot(plot); |
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} |
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{ |
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Ptr<JakesPropagationLossModel> jakes = CreateObject<JakesPropagationLossModel> (); |
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// doppler frequency shift for 5.15 GHz at 100 km/h |
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jakes->SetAttribute("DopplerFreq", DoubleValue(477.9)); |
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Gnuplot plot = TestDeterministicByTime (jakes, Seconds(0.001), Seconds(1.0)); |
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plot.SetTitle("ns3::JakesPropagationLossModel (with 477.9 Hz shift and 1 millisec resolution)"); |
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gnuplots.AddPlot(plot); |
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} |
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{ |
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Ptr<JakesPropagationLossModel> jakes = CreateObject<JakesPropagationLossModel> (); |
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// doppler frequency shift for 5.15 GHz at 100 km/h |
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jakes->SetAttribute("DopplerFreq", DoubleValue(477.9)); |
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Gnuplot plot = TestDeterministicByTime (jakes, Seconds(0.0001), Seconds(0.1)); |
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plot.SetTitle("ns3::JakesPropagationLossModel (with 477.9 Hz shift and 0.1 millisec resolution)"); |
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gnuplots.AddPlot(plot); |
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} |
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{ |
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Ptr<ThreeLogDistancePropagationLossModel> log3 = CreateObject<ThreeLogDistancePropagationLossModel> (); |
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Gnuplot plot = TestDeterministic(log3); |
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plot.SetTitle("ns3::ThreeLogDistancePropagationLossModel (Defaults)"); |
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gnuplots.AddPlot(plot); |
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} |
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{ |
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Ptr<ThreeLogDistancePropagationLossModel> log3 = CreateObject<ThreeLogDistancePropagationLossModel> (); |
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// more prominent example values: |
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log3->SetAttribute("Exponent0", DoubleValue(1.0)); |
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log3->SetAttribute("Exponent1", DoubleValue(3.0)); |
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log3->SetAttribute("Exponent2", DoubleValue(10.0)); |
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Gnuplot plot = TestDeterministic(log3); |
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plot.SetTitle("ns3::ThreeLogDistancePropagationLossModel (Exponents 1.0, 3.0 and 10.0)"); |
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gnuplots.AddPlot(plot); |
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} |
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|
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{ |
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Ptr<NakagamiPropagationLossModel> nak = CreateObject<NakagamiPropagationLossModel> (); |
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Gnuplot plot = TestProbabilistic(nak); |
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plot.SetTitle("ns3::NakagamiPropagationLossModel (Default Parameters)"); |
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gnuplots.AddPlot(plot); |
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} |
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|
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{ |
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Ptr<ThreeLogDistancePropagationLossModel> log3 = CreateObject<ThreeLogDistancePropagationLossModel> (); |
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Ptr<NakagamiPropagationLossModel> nak = CreateObject<NakagamiPropagationLossModel> (); |
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log3->SetNext(nak); |
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|
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Gnuplot plot = TestProbabilistic(log3); |
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plot.SetTitle("ns3::ThreeLogDistancePropagationLossModel and ns3::NakagamiPropagationLossModel (Default Parameters)"); |
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gnuplots.AddPlot(plot); |
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} |
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gnuplots.GenerateOutput(std::cout); |
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return 0; |
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} |