A Discrete-Event Network Simulator
API
itu-r-1411-los-propagation-loss-model.cc
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1 /* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2011, 2012 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Author: Marco Miozzo <marco.miozzo@cttc.es>,
19  * Nicola Baldo <nbaldo@cttc.es>
20  *
21  */
22 #include "ns3/log.h"
23 #include "ns3/double.h"
24 #include "ns3/enum.h"
25 #include "ns3/mobility-model.h"
26 #include <cmath>
27 
29 
30 namespace ns3 {
31 
32 NS_LOG_COMPONENT_DEFINE ("ItuR1411LosPropagationLossModel");
33 
34 NS_OBJECT_ENSURE_REGISTERED (ItuR1411LosPropagationLossModel);
35 
36 TypeId
38 {
39  static TypeId tid = TypeId ("ns3::ItuR1411LosPropagationLossModel")
41  .SetGroupName ("Propagation")
42  .AddConstructor<ItuR1411LosPropagationLossModel> ()
43  .AddAttribute ("Frequency",
44  "The propagation frequency in Hz",
45  DoubleValue (2160e6),
47  MakeDoubleChecker<double> ());
48 
49  return tid;
50 }
51 
54 {
55 }
56 
58 {
59 }
60 
61 double
63 {
64  NS_LOG_FUNCTION (this);
65  double dist = a->GetDistanceFrom (b);
66  double lossLow = 0.0;
67  double lossUp = 0.0;
68  NS_ASSERT_MSG (a->GetPosition ().z > 0 && b->GetPosition ().z > 0, "nodes' height must be greater than 0");
69  double Lbp = std::fabs (20 * std::log10 ((m_lambda * m_lambda) / (8 * M_PI * a->GetPosition ().z * b->GetPosition ().z)));
70  double Rbp = (4 * a->GetPosition ().z * b->GetPosition ().z) / m_lambda;
71  NS_LOG_LOGIC (this << " Lbp " << Lbp << " Rbp " << Rbp << " lambda " << m_lambda);
72  if (dist <= Rbp)
73  {
74  lossLow = Lbp + 20 * std::log10 (dist / Rbp);
75  lossUp = Lbp + 20 + 25 * std::log10 (dist / Rbp);
76  }
77  else
78  {
79  lossLow = Lbp + 40 * std::log10 (dist / Rbp);
80  lossUp = Lbp + 20 + 40 * std::log10 (dist / Rbp);
81  }
82 
83  double loss = (lossUp + lossLow) / 2;
84 
85  return loss;
86 }
87 
88 
89 void
91 {
92  NS_ASSERT (freq > 0.0);
93  m_lambda = 299792458.0 / freq;
94 }
95 
96 
97 double
100  Ptr<MobilityModel> b) const
101 {
102  return (txPowerDbm - GetLoss (a, b));
103 }
104 
105 int64_t
107 {
108  return 0;
109 }
110 } // namespace ns3
#define NS_LOG_FUNCTION(parameters)
If log level LOG_FUNCTION is enabled, this macro will output all input parameters separated by "...
double GetDistanceFrom(Ptr< const MobilityModel > position) const
#define NS_OBJECT_ENSURE_REGISTERED(type)
Register an Object subclass with the TypeId system.
Definition: object-base.h:45
#define NS_ASSERT(condition)
At runtime, in debugging builds, if this condition is not true, the program prints the source file...
Definition: assert.h:67
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:202
Vector GetPosition(void) const
NS_ASSERT_MSG(false,"Ipv4AddressGenerator::MaskToIndex(): Impossible")
double GetLoss(Ptr< MobilityModel > a, Ptr< MobilityModel > b) const
void SetFrequency(double freq)
Set the operating frequency.
virtual double DoCalcRxPower(double txPowerDbm, Ptr< MobilityModel > a, Ptr< MobilityModel > b) const
Returns the Rx Power taking into account only the particular PropagatinLossModel. ...
Every class exported by the ns3 library is enclosed in the ns3 namespace.
NS_LOG_LOGIC("Net device "<< nd<< " is not bridged")
Ptr< const AttributeAccessor > MakeDoubleAccessor(T1 a1)
Create an AttributeAccessor for a class data member, or a lone class get functor or set method...
Definition: double.h:42
Models the propagation loss through a transmission medium.
virtual int64_t DoAssignStreams(int64_t stream)
Subclasses must implement this; those not using random variables can return zero. ...
This class can be used to hold variables of floating point type such as &#39;double&#39; or &#39;float&#39;...
Definition: double.h:41
a unique identifier for an interface.
Definition: type-id.h:58
TypeId SetParent(TypeId tid)
Set the parent TypeId.
Definition: type-id.cc:915