mirror of
https://gitlab.ibr.cs.tu-bs.de/tschuber/ns-3-leo.git
synced 2025-06-08 10:03:58 +02:00
136 lines
3.9 KiB
C++
136 lines
3.9 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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#include <math.h>
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#include "ns3/log.h"
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#include "ns3/mobility-model.h"
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#include "ns3/double.h"
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#include "leo-propagation-loss-model.h"
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namespace ns3 {
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NS_LOG_COMPONENT_DEFINE ("LeoPropagationLossModel");
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NS_OBJECT_ENSURE_REGISTERED (LeoPropagationLossModel);
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TypeId
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LeoPropagationLossModel::GetTypeId (void)
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{
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static TypeId tid = TypeId ("ns3::LeoPropagationLossModel")
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.SetParent<PropagationLossModel> ()
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.SetGroupName ("Leo")
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.AddConstructor<LeoPropagationLossModel> ()
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.AddAttribute ("MaxDistance",
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"Cut-off distance for signal propagation",
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DoubleValue (3000),
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MakeDoubleAccessor (&LeoPropagationLossModel::SetCutoffDistance,
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&LeoPropagationLossModel::GetCutoffDistance),
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MakeDoubleChecker<double> ())
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.AddAttribute ("ElevationAngle",
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"Cut-off angle for signal propagation",
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DoubleValue (M_PI / 9),
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MakeDoubleAccessor (&LeoPropagationLossModel::SetElevationAngle,
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&LeoPropagationLossModel::GetElevationAngle),
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MakeDoubleChecker<double> ())
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.AddAttribute ("AtmosphericLoss",
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"Atmospheric loss due to attenuation in dB",
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DoubleValue (0.0),
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MakeDoubleAccessor (&LeoPropagationLossModel::m_atmosphericLoss),
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MakeDoubleChecker<double> ())
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.AddAttribute ("FreeSpacePathLoss",
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"Free space path loss in dB",
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DoubleValue (0.0),
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MakeDoubleAccessor (&LeoPropagationLossModel::m_freeSpacePathLoss),
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MakeDoubleChecker<double> ())
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.AddAttribute ("LinkMargin",
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"Link margin in dB",
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DoubleValue (0.0),
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MakeDoubleAccessor (&LeoPropagationLossModel::m_linkMargin),
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MakeDoubleChecker<double> ())
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;
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return tid;
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}
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LeoPropagationLossModel::LeoPropagationLossModel ()
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{
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}
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LeoPropagationLossModel::~LeoPropagationLossModel ()
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{
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}
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double
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LeoPropagationLossModel::GetAngle (Ptr<MobilityModel> a, Ptr<MobilityModel> b)
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{
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Vector3D pa = a->GetPosition () - b->GetPosition ();
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Vector3D pb = b->GetPosition ();
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pb = Vector3D (-pb.x, -pb.y, -pb.z);
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double prod = abs ((pa.x * pb.x) + (pa.y * pb.y) + (pa.z * pb.z));
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double norm = pb.GetLength () * pa.GetLength ();
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return acos (prod / norm);
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}
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void
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LeoPropagationLossModel::SetElevationAngle (double angle)
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{
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m_elevationAngle = angle * (M_PI/180.0);
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}
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double
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LeoPropagationLossModel::GetElevationAngle () const
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{
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return m_elevationAngle * (180.0/M_PI);
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}
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void
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LeoPropagationLossModel::SetCutoffDistance (double d)
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{
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m_cutoffDistance = d * 1000.0;
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}
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double
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LeoPropagationLossModel::GetCutoffDistance () const
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{
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return m_cutoffDistance / 1000.0;
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}
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double
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LeoPropagationLossModel::DoCalcRxPower (double txPowerDbm,
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Ptr<MobilityModel> a,
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Ptr<MobilityModel> b) const
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{
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double distance = a->GetDistanceFrom (b);
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double angle = GetAngle (a, b);
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double rxc = txPowerDbm - m_atmosphericLoss - m_freeSpacePathLoss - m_linkMargin;
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NS_LOG_DEBUG ("LEO propagation: a=" << a->GetPosition () << " b=" << b->GetPosition () << " m_cutOff="<<m_cutoffDistance<<" m_angle="<<m_elevationAngle<<" dist=" << distance << "angle=" << angle << "rxc=" << rxc);
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if (distance > m_cutoffDistance)
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{
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NS_LOG_DEBUG ("LEO DROP DISTANCE: " << distance);
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return -1000.0;
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}
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if (angle > m_elevationAngle / 2.0)
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{
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NS_LOG_DEBUG ("LEO DROP ANGLE: " << angle <<"; " << distance);
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return -1000.0;
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}
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// txPowerDbm includes tx antenna gain and losses
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// receiver loss and gain added at net device
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// P_{RX} = P_{TX} + G_{TX} - L_{TX} - L_{FS} - L_M + G_{RX} - L_{RX}
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return rxc;
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}
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int64_t
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LeoPropagationLossModel::DoAssignStreams (int64_t stream)
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{
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return 0;
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}
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};
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