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jakes-propagation-loss-model.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2012 Telum (www.telum.ru)
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: Kirill Andreev <andreev@telum.ru>
19  */
20 
21 #include "jakes-propagation-loss-model.h"
22 #include "ns3/double.h"
23 #include "ns3/log.h"
24 
25 NS_LOG_COMPONENT_DEFINE ("Jakes");
26 
27 namespace ns3
28 {
29 NS_OBJECT_ENSURE_REGISTERED (JakesPropagationLossModel);
30 
31 
32 const double JakesPropagationLossModel::PI = 3.14159265358979323846;
33 
34 JakesPropagationLossModel::JakesPropagationLossModel()
35 {
36  m_uniformVariable = CreateObject<UniformRandomVariable> ();
37  m_uniformVariable->SetAttribute ("Min", DoubleValue (-1.0 * PI));
38  m_uniformVariable->SetAttribute ("Max", DoubleValue (PI));
39 }
40 
41 JakesPropagationLossModel::~JakesPropagationLossModel()
42 {}
43 
44 TypeId
45 JakesPropagationLossModel::GetTypeId ()
46 {
47  static TypeId tid = TypeId ("ns3::JakesPropagationLossModel")
48  .SetParent<PropagationLossModel> ()
49  .AddConstructor<JakesPropagationLossModel> ()
50  ;
51  return tid;
52 }
53 
54 double
55 JakesPropagationLossModel::DoCalcRxPower (double txPowerDbm,
56  Ptr<MobilityModel> a,
57  Ptr<MobilityModel> b) const
58 {
59  Ptr<JakesProcess> pathData = m_propagationCache.GetPathData (a, b, 0 );
60  if (pathData == 0)
61  {
62  pathData = CreateObject<JakesProcess> ();
63  pathData->SetPropagationLossModel (this);
64  m_propagationCache.AddPathData (pathData, a, b, 0);
65  }
66  return txPowerDbm + pathData->GetChannelGainDb ();
67 }
68 
69 Ptr<UniformRandomVariable>
70 JakesPropagationLossModel::GetUniformRandomVariable () const
71 {
72  return m_uniformVariable;
73 }
74 
75 int64_t
76 JakesPropagationLossModel::DoAssignStreams (int64_t stream)
77 {
78  m_uniformVariable->SetStream (stream);
79  return 1;
80 }
81 
82 } // namespace ns3
83