A Discrete-Event Network Simulator
API
uan-prop-model-thorp.cc
Go to the documentation of this file.
1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2009 University of Washington
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: Leonard Tracy <lentracy@gmail.com>
19  */
20 #include "uan-prop-model-thorp.h"
21 #include "uan-tx-mode.h"
22 #include "ns3/double.h"
23 #include "ns3/log.h"
24 
25 namespace ns3 {
26 
27 NS_LOG_COMPONENT_DEFINE ("UanPropModelThorp");
28 
29 NS_OBJECT_ENSURE_REGISTERED (UanPropModelThorp);
30 
32 {
33 }
34 
36 {
37 }
38 
39 TypeId
41 {
42  static TypeId tid = TypeId ("ns3::UanPropModelThorp")
44  .SetGroupName ("Uan")
45  .AddConstructor<UanPropModelThorp> ()
46  .AddAttribute ("SpreadCoef",
47  "Spreading coefficient used in calculation of Thorp's approximation.",
48  DoubleValue (1.5),
50  MakeDoubleChecker<double> ())
51  ;
52  return tid;
53 }
54 
55 double
57 {
58  double dist = a->GetDistanceFrom (b);
59 
60  return m_SpreadCoef * 10.0 * std::log10 (dist)
61  + (dist / 1000.0) * GetAttenDbKm (mode.GetCenterFreqHz () / 1000.0);
62 }
63 
64 UanPdp
66 {
67  return UanPdp::CreateImpulsePdp ();
68 }
69 
70 Time
72 {
73  return Seconds (a->GetDistanceFrom (b) / 1500.0);
74 }
75 
76 double
78 {
79 
80  return GetAttenDbKm (freqKhz) / 1.093613298;
81 }
82 
83 double
85 {
86 
87  double fsq = freqKhz * freqKhz;
88  double atten;
89 
90  if (freqKhz >= 0.4)
91  {
92  atten = 0.11 * fsq / (1 + fsq) + 44 * fsq / (4100 + fsq)
93  + 2.75 * 0.0001 * fsq + 0.003;
94  }
95  else
96  {
97  atten = 0.002 + 0.11 * (freqKhz / (1 + freqKhz)) + 0.011 * freqKhz;
98  }
99 
100  return atten;
101 }
102 
103 } // namespace ns3
double GetAttenDbKm(double freqKhz)
Get the attenuation in dB / km.
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:102
#define NS_OBJECT_ENSURE_REGISTERED(type)
Register an Object subclass with the TypeId system.
Definition: object-base.h:45
virtual Time GetDelay(Ptr< MobilityModel > a, Ptr< MobilityModel > b, UanTxMode mode)
Finds propagation delay between nodes a and b.
double GetAttenDbKyd(double freqKhz)
Get the attenuation in dB / 1000 yards.
static UanPdp CreateImpulsePdp(void)
Get a unit impulse PDP at time 0.
static TypeId GetTypeId(void)
Register this type.
Base class for implemented underwater propagation models.
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:205
Uses Thorp&#39;s approximation to compute pathloss.
double m_SpreadCoef
Spreading coefficient used in calculation of Thorp&#39;s approximation.
The power delay profile returned by propagation models.
Abstraction of packet modulation information.
Definition: uan-tx-mode.h:41
double GetDistanceFrom(Ptr< const MobilityModel > position) const
Every class exported by the ns3 library is enclosed in the ns3 namespace.
virtual double GetPathLossDb(Ptr< MobilityModel > a, Ptr< MobilityModel > b, UanTxMode mode)
Computes pathloss between nodes a and b.
UanPropModelThorp()
Default constructor.
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
uint32_t GetCenterFreqHz(void) const
Get the transmission center frequency.
Definition: uan-tx-mode.cc:57
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition: nstime.h:1070
virtual ~UanPropModelThorp()
Destructor.
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:923
virtual UanPdp GetPdp(Ptr< MobilityModel > a, Ptr< MobilityModel > b, UanTxMode mode)
Get the PDP for the path between two nodes.