satellite-phy-rx-carrier.cc

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2014 Magister Solutions Ltd.
 * Copyright (c) 2018 CNES
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Jani Puttonen <jani.puttonen@magister.fi>
 * Author: Mathias Ettinger <mettinger@toulouse.viveris.fr>
 */
 
#include "satellite-phy-rx-carrier.h"
 
#include "../stats/satellite-phy-rx-carrier-packet-probe.h"
#include "satellite-composite-sinr-output-trace-container.h"
#include "satellite-const-variables.h"
#include "satellite-constant-interference.h"
#include "satellite-crdsa-replica-tag.h"
#include "satellite-mac-tag.h"
#include "satellite-per-fragment-interference.h"
#include "satellite-per-packet-interference.h"
#include "satellite-perfect-interference-elimination.h"
#include "satellite-phy.h"
#include "satellite-residual-interference-elimination.h"
#include "satellite-rtn-link-time.h"
#include "satellite-signal-parameters.h"
#include "satellite-traced-interference.h"
#include "satellite-utils.h"
 
#include "ns3/address.h"
#include "ns3/boolean.h"
#include "ns3/log.h"
#include "ns3/simulator.h"
#include "ns3/singleton.h"
 
#include <algorithm>
#include <limits>
#include <ostream>
#include <utility>
#include <vector>
 
NS_LOG_COMPONENT_DEFINE("SatPhyRxCarrier");
 
namespace ns3
{
 
NS_OBJECT_ENSURE_REGISTERED(SatPhyRxCarrier);
 
SatPhyRxCarrier::SatPhyRxCarrier(uint32_t carrierId,
                                 Ptr<SatPhyRxCarrierConf> carrierConf,
                                 Ptr<SatWaveformConf> waveformConf,
                                 bool isRandomAccessEnabled)
    : m_randomAccessEnabled(isRandomAccessEnabled),
      m_state(IDLE),
      m_satId(),
      m_beamId(),
      m_carrierId(carrierId),
      m_receivingDedicatedAccess(false),
      m_satInterference(),
      m_satInterferenceElimination(),
      m_enableCompositeSinrOutputTrace(false),
      m_numOfOngoingRx(0),
      m_rxPacketCounter(0),
      m_waveformConf(waveformConf)
{
    NS_LOG_FUNCTION(this << carrierId);
 
    m_rxBandwidthHz = carrierConf->GetCarrierBandwidthHz(carrierId, SatEnums::EFFECTIVE_BANDWIDTH);
 
    // Set channel type
    SetChannelType(carrierConf->GetChannelType());
 
    // Set link regeneration mode
    SetLinkRegenerationMode(carrierConf->GetLinkRegenerationMode());
 
    // Create proper interference object for carrier i
    DoCreateInterferenceModel(carrierConf, carrierId, m_rxBandwidthHz);
    DoCreateInterferenceEliminationModel(carrierConf, carrierId, waveformConf);
 
    m_rxExtNoisePowerW = carrierConf->GetExtPowerDensityWhz() * m_rxBandwidthHz;
 
    m_errorModel = carrierConf->GetErrorModel();
 
    if (m_errorModel == SatPhyRxCarrierConf::EM_AVI)
    {
        NS_LOG_INFO(this << " link results in use in carrier: " << carrierId);
        m_linkResults = carrierConf->GetLinkResults();
    }
 
    m_rxTemperatureK = carrierConf->GetRxTemperatureK();
 
    // calculate RX noise
    m_rxNoisePowerW = SatConstVariables::BOLTZMANN_CONSTANT * m_rxTemperatureK * m_rxBandwidthHz;
 
    // calculate RX ACI power
    m_rxAciIfPowerW = m_rxNoisePowerW * carrierConf->GetRxAciInterferenceWrtNoiseFactor();
 
    m_additionalInterferenceCallback = carrierConf->GetAdditionalInterferenceCb();
 
    // Constant error rate for dedicated access.
    m_constantErrorRate = carrierConf->GetConstantDaErrorRate();

    m_uniformVariable = CreateObject<UniformRandomVariable>();
 
    // Configured channel estimation error
    m_channelEstimationError = carrierConf->GetChannelEstimatorErrorContainer();
 
    NS_LOG_INFO("Carrier ID: " << m_carrierId << ", channel type: "
                               << SatEnums::GetChannelTypeName(GetChannelType()));
}
 
void
SatPhyRxCarrier::DoCreateInterferenceModel(Ptr<SatPhyRxCarrierConf> carrierConf,
                                           uint32_t carrierId,
                                           double rxBandwidthHz)
{
    switch (carrierConf->GetInterferenceModel(m_randomAccessEnabled))
    {
    case SatPhyRxCarrierConf::IF_CONSTANT: {
        NS_LOG_INFO(this << " Constant interference model created for carrier: " << carrierId);
        m_satInterference = CreateObject<SatConstantInterference>();
        break;
    }
    case SatPhyRxCarrierConf::IF_PER_PACKET: {
        NS_LOG_INFO(this << " Per packet interference model created for carrier: " << carrierId);
        if (carrierConf->IsIntfOutputTraceEnabled())
        {
            m_satInterference =
                CreateObject<SatPerPacketInterference>(GetChannelType(), rxBandwidthHz);
        }
        else
        {
            m_satInterference = CreateObject<SatPerPacketInterference>();
        }
        break;
    }
    case SatPhyRxCarrierConf::IF_PER_FRAGMENT: {
        NS_LOG_INFO(this << " Per fragment interference model created for carrier: " << carrierId);
        if (carrierConf->IsIntfOutputTraceEnabled())
        {
            m_satInterference =
                CreateObject<SatPerFragmentInterference>(GetChannelType(), rxBandwidthHz);
        }
        else
        {
            m_satInterference = CreateObject<SatPerFragmentInterference>();
        }
        break;
    }
    case SatPhyRxCarrierConf::IF_TRACE: {
        NS_LOG_INFO(this << " Traced interference model created for carrier: " << carrierId);
        m_satInterference = CreateObject<SatTracedInterference>(GetChannelType(), rxBandwidthHz);
        break;
    }
    default: {
        NS_LOG_ERROR(this << " Not a valid interference model!");
        break;
    }
    }
}
 
void
SatPhyRxCarrier::DoCreateInterferenceEliminationModel(Ptr<SatPhyRxCarrierConf> carrierConf,
                                                      uint32_t carrierId,
                                                      Ptr<SatWaveformConf> waveformConf)
{
    switch (carrierConf->GetInterferenceEliminationModel(m_randomAccessEnabled))
    {
    case SatPhyRxCarrierConf::SIC_PERFECT: {
        NS_LOG_INFO(this << " Perfect interference elimination model created for carrier: "
                         << carrierId);
        m_satInterferenceElimination = CreateObject<SatPerfectInterferenceElimination>();
        break;
    }
    case SatPhyRxCarrierConf::SIC_RESIDUAL: {
        NS_LOG_INFO(this << " Residual interference elimination model created for carrier: "
                         << carrierId);
        m_satInterferenceElimination =
            CreateObject<SatResidualInterferenceElimination>(waveformConf);
        break;
    }
    default: {
        NS_LOG_ERROR(this << " Not a valid interference elimination model!");
        break;
    }
    }
}
 
SatPhyRxCarrier::~SatPhyRxCarrier()
{
    NS_LOG_FUNCTION(this);
}
 
void
SatPhyRxCarrier::BeginEndScheduling(void)
{
}
 
TypeId
SatPhyRxCarrier::GetTypeId(void)
{
    static TypeId tid =
        TypeId("ns3::SatPhyRxCarrier")
            .SetParent<Object>()
            .AddAttribute("EnableCompositeSinrOutputTrace",
                          "Enable composite SINR output trace.",
                          BooleanValue(false),
                          MakeBooleanAccessor(&SatPhyRxCarrier::m_enableCompositeSinrOutputTrace),
                          MakeBooleanChecker())
            .AddTraceSource("LinkBudgetTrace",
                            "The trace for link budget related quantities",
                            MakeTraceSourceAccessor(&SatPhyRxCarrier::m_linkBudgetTrace),
                            "ns3::SatPhyRxCarrier::LinkBudgetTraceCallback")
            .AddTraceSource("RxPowerTrace",
                            "The trace for received signal power in dBW",
                            MakeTraceSourceAccessor(&SatPhyRxCarrier::m_rxPowerTrace),
                            "ns3::SatPhyRxCarrier::RxPowerTraceCallback")
            .AddTraceSource("Sinr",
                            "The trace for composite SINR in dB",
                            MakeTraceSourceAccessor(&SatPhyRxCarrier::m_sinrTrace),
                            "ns3::SatPhyRxCarrier::SinrTraceCallback")
            .AddTraceSource("LinkSinr",
                            "The trace for link specific SINR in dB",
                            MakeTraceSourceAccessor(&SatPhyRxCarrier::m_linkSinrTrace),
                            "ns3::SatPhyRxCarrier::LinkSinrTraceCallback")
            .AddTraceSource("DaRx",
                            "Received a packet burst through Dedicated Channel",
                            MakeTraceSourceAccessor(&SatPhyRxCarrier::m_daRxTrace),
                            "ns3::SatPhyRxCarrierPacketProbe::RxStatusCallback")
            .AddTraceSource("DaRxCarrierId",
                            "Received a packet burst though DAMA",
                            MakeTraceSourceAccessor(&SatPhyRxCarrier::m_daRxCarrierIdTrace),
                            "ns3::SatTypedefs::DataSenderAddressCallback");
    return tid;
}
 
void
SatPhyRxCarrier::DoDispose()
{
    NS_LOG_FUNCTION(this);
 
    m_rxCallback.Nullify();
    m_cnoCallback.Nullify();
    m_additionalInterferenceCallback.Nullify();
    m_avgNormalizedOfferedLoadCallback.Nullify();
    m_satInterference = nullptr;
    m_satInterferenceElimination = nullptr;
    m_uniformVariable = nullptr;
 
    Object::DoDispose();
}
 
std::ostream&
operator<<(std::ostream& os, SatPhyRxCarrier::State s)
{
    switch (s)
    {
    case SatPhyRxCarrier::IDLE:
        os << "IDLE";
        break;
    case SatPhyRxCarrier::RX:
        os << "RX";
        break;
    default:
        os << "UNKNOWN";
        break;
    }
    return os;
}
 
void
SatPhyRxCarrier::SetReceiveCb(SatPhyRx::ReceiveCallback cb)
{
    NS_LOG_FUNCTION(this);
    m_rxCallback = cb;
}
 
void
SatPhyRxCarrier::SetCnoCb(SatPhyRx::CnoCallback cb)
{
    NS_LOG_FUNCTION(this);
    m_cnoCallback = cb;
}
 
void
SatPhyRxCarrier::ChangeState(State newState)
{
    NS_LOG_FUNCTION(this << newState);
    NS_LOG_INFO(this << " state: " << m_state << " -> " << newState);
    m_state = newState;
}
 
std::pair<bool, SatPhyRxCarrier::rxParams_s>
SatPhyRxCarrier::GetReceiveParams(Ptr<SatSignalParameters> rxParams)
{
    SatPhyRxCarrier::rxParams_s params;
    params.rxParams = rxParams;
    // Receive packet by default in satellite, discard in UT
    bool receivePacket = GetDefaultReceiveMode();
    bool ownAddressFound = false;
 
    // If satellite and regeneration_phy -> do not check MAC address, but store it for stat purposes
    if ((rxParams->m_channelType == SatEnums::FORWARD_FEEDER_CH ||
         rxParams->m_channelType == SatEnums::RETURN_USER_CH) &&
        m_linkRegenerationMode == SatEnums::REGENERATION_PHY)
    {
        if (!rxParams->m_packetsInBurst.empty())
        {
            SatMacTag mTag;
            rxParams->m_packetsInBurst[0]->PeekPacketTag(mTag);
            SatAddressE2ETag addressE2ETag;
            rxParams->m_packetsInBurst[0]->PeekPacketTag(addressE2ETag);
 
            params.destAddress = mTag.GetDestAddress();
            params.sourceAddress = mTag.GetSourceAddress();
            params.finalDestAddress = addressE2ETag.GetE2EDestAddress();
            params.finalSourceAddress = addressE2ETag.GetE2ESourceAddress();
        }
        receivePacket = true;
    }
    else
    {
        for (SatSignalParameters::PacketsInBurst_t::const_iterator i =
                 rxParams->m_packetsInBurst.begin();
             ((i != rxParams->m_packetsInBurst.end()) && (ownAddressFound == false));
             i++)
        {
            SatMacTag mTag;
            (*i)->PeekPacketTag(mTag);
            SatAddressE2ETag addressE2ETag;
            (*i)->PeekPacketTag(addressE2ETag);
 
            params.destAddress = mTag.GetDestAddress();
            params.sourceAddress = mTag.GetSourceAddress();
            params.finalDestAddress = addressE2ETag.GetE2EDestAddress();
            params.finalSourceAddress = addressE2ETag.GetE2ESourceAddress();
 
            if ((params.destAddress == GetOwnAddress()))
            {
                NS_LOG_INFO("Packet intended for this specific receiver: " << params.destAddress);
 
                receivePacket = true;
                ownAddressFound = true;
            }
            else if (params.destAddress.IsBroadcast())
            {
                NS_LOG_INFO("Destination is broadcast address: " << params.destAddress);
                receivePacket = true;
            }
            else if (params.destAddress.IsGroup())
            {
                NS_LOG_INFO("Destination is multicast address: " << params.destAddress);
                receivePacket = true;
            }
        }
    }
    return std::make_pair(receivePacket, params);
}
 
bool
SatPhyRxCarrier::StartRx(Ptr<SatSignalParameters> rxParams)
{
    NS_LOG_FUNCTION(this << rxParams);
    NS_LOG_INFO("State: " << m_state);
    NS_ASSERT(rxParams->m_carrierId == m_carrierId);
 
    uint32_t key;
 
    NS_LOG_INFO("Node: " << m_nodeInfo->GetMacAddress()
                         << " starts receiving packet at: " << Simulator::Now().GetSeconds()
                         << " in carrier: " << rxParams->m_carrierId);
    NS_LOG_INFO("Sender: " << rxParams->m_phyTx);
 
    switch (m_state)
    {
    case IDLE:
    case RX: {
        std::pair<bool, SatPhyRxCarrier::rxParams_s> receiveParamTuple = GetReceiveParams(rxParams);
 
        bool receivePacket = receiveParamTuple.first;
        rxParams_s rxParamsStruct = receiveParamTuple.second;
 
        // add interference in any case
        rxParamsStruct.interferenceEvent =
            CreateInterference(rxParams, rxParamsStruct.sourceAddress);
 
        // Check whether the packet is sent to our beam.
        // In case that RX mode is something else than transparent
        // additionally check that whether the packet was intended for this specific receiver
 
        bool isGoodBeam = (rxParams->m_beamId == GetBeamId());
        if ((GetChannelType() == SatEnums::RETURN_FEEDER_CH) &&
            (m_linkRegenerationMode == SatEnums::REGENERATION_LINK ||
             m_linkRegenerationMode == SatEnums::REGENERATION_NETWORK))
        {
            isGoodBeam = true;
        }
 
        if (receivePacket && isGoodBeam)
        {
            if (IsReceivingDedicatedAccess() &&
                rxParams->m_txInfo.packetType == SatEnums::PACKET_TYPE_DEDICATED_ACCESS)
            {
                NS_LOG_WARN("Starting reception of a packet when receiving DA transmission! "
                            "This may be due to a clock drift in UTs too important, or an "
                            "update period for SGP4 too important.");
                return false;
            }
 
            GetInterferenceModel()->NotifyRxStart(rxParamsStruct.interferenceEvent);
 
            key = m_rxPacketCounter;
            m_rxPacketCounter++;
 
            StoreRxParams(key, rxParamsStruct);
 
            NS_LOG_INFO(this << " scheduling EndRx with delay " << rxParams->m_duration.GetSeconds()
                             << "s");
 
            // Update link specific received signal power
            if (GetChannelType() == SatEnums::FORWARD_FEEDER_CH ||
                GetChannelType() == SatEnums::FORWARD_USER_CH)
            {
                m_rxPowerTrace(SatUtils::LinearToDb(rxParams->m_rxPower_W),
                               rxParamsStruct.finalDestAddress);
            }
            else if (GetChannelType() == SatEnums::RETURN_FEEDER_CH ||
                     GetChannelType() == SatEnums::RETURN_USER_CH)
            {
                m_rxPowerTrace(SatUtils::LinearToDb(rxParams->m_rxPower_W),
                               rxParamsStruct.finalSourceAddress);
            }
            else
            {
                NS_FATAL_ERROR("Incorrect channel for satPhyRxCarrierUplink: "
                               << SatEnums::GetChannelTypeName(GetChannelType()));
            }
 
            Simulator::Schedule(rxParams->m_duration, &SatPhyRxCarrier::EndRxData, this, key);
 
            IncreaseNumOfRxState(rxParams->m_txInfo.packetType);
 
            return true;
        }
        break;
    }
    default: {
        NS_FATAL_ERROR("SatPhyRxCarrier::StartRx - Unknown state");
        break;
    }
    }
 
    return false;
}
 
void
SatPhyRxCarrier::DoCompositeSinrOutputTrace(double cSinr)
{
    NS_LOG_FUNCTION(this);
 
    std::vector<double> tempVector;
    tempVector.push_back(Now().GetSeconds());
    tempVector.push_back(cSinr);
 
    Singleton<SatCompositeSinrOutputTraceContainer>::Get()->AddToContainer(
        std::make_pair(GetOwnAddress(), GetChannelType()),
        tempVector);
}
 
bool
SatPhyRxCarrier::CheckAgainstLinkResults(double cSinr, Ptr<SatSignalParameters> rxParams)
{
    NS_LOG_FUNCTION(this);

    bool error = false;
 
    switch (m_errorModel)
    {
    case SatPhyRxCarrierConf::EM_AVI: {
        error = CheckAgainstLinkResultsErrorModelAvi(cSinr, rxParams);
        break;
    }
    case SatPhyRxCarrierConf::EM_CONSTANT: {
        double r = GetUniformRandomValue(0, 1);
        if (r < m_constantErrorRate)
        {
            error = true;
        }
        break;
    }
    case SatPhyRxCarrierConf::EM_NONE: {
        break;
    }
    default: {
        NS_FATAL_ERROR("SatPhyRxCarrier::EndRxData - Error model not defined");
        break;
    }
    }
    return error;
}
 
bool
SatPhyRxCarrier::CheckAgainstLinkResultsErrorModelAvi(double cSinr,
                                                      Ptr<SatSignalParameters> rxParams)
{
    bool error = false;
 
    switch (GetChannelType())
    {
    case SatEnums::FORWARD_FEEDER_CH:
    case SatEnums::FORWARD_USER_CH: {
 
        double ber = (GetLinkResults()->GetObject<SatLinkResultsFwd>())
                         ->GetBler(rxParams->m_txInfo.modCod,
                                   rxParams->m_txInfo.frameType,
                                   SatUtils::LinearToDb(cSinr));
        double r = GetUniformRandomValue(0, 1);
 
        if (r < ber)
        {
            error = true;
        }
 
        NS_LOG_INFO("FORWARD cSinr (dB): " << SatUtils::LinearToDb(cSinr) << " esNo (dB): "
                                           << SatUtils::LinearToDb(cSinr) << " rand: " << r
                                           << " ber: " << ber << " error: " << error);
        break;
    }
 
    case SatEnums::RETURN_FEEDER_CH:
    case SatEnums::RETURN_USER_CH: {
 
        double ebNo = cSinr / (SatUtils::GetCodingRate(rxParams->m_txInfo.modCod) *
                               SatUtils::GetModulatedBits(rxParams->m_txInfo.modCod));
 
        double ber;
        if ((m_linkRegenerationMode == SatEnums::REGENERATION_LINK ||
             m_linkRegenerationMode == SatEnums::REGENERATION_NETWORK) &&
            GetChannelType() == SatEnums::RETURN_FEEDER_CH)
        {
            ber = (GetLinkResults()->GetObject<SatLinkResultsFwd>())
                      ->GetBler(rxParams->m_txInfo.modCod,
                                rxParams->m_txInfo.frameType,
                                SatUtils::LinearToDb(cSinr));
        }
        else
        {
            ber = (GetLinkResults()->GetObject<SatLinkResultsRtn>())
                      ->GetBler(rxParams->m_txInfo.waveformId, SatUtils::LinearToDb(ebNo));
        }
        double r = GetUniformRandomValue(0, 1);
 
        if (r < ber)
        {
            error = true;
        }
 
        NS_LOG_INFO("RETURN cSinr (dB): "
                    << SatUtils::LinearToDb(cSinr) << " ebNo (dB): " << SatUtils::LinearToDb(ebNo)
                    << " modulated bits: " << SatUtils::GetModulatedBits(rxParams->m_txInfo.modCod)
                    << " rand: " << r << " ber: " << ber << " error: " << error);
        break;
    }
    case SatEnums::UNKNOWN_CH:
    default: {
        NS_FATAL_ERROR(
            "SatPhyRxCarrier::CheckAgainstLinkResultsErrorModelAvi - Invalid channel type!");
        break;
    }
    }
    return error;
}
 
void
SatPhyRxCarrier::SetNodeInfo(const Ptr<SatNodeInfo> nodeInfo)
{
    NS_LOG_FUNCTION(this << nodeInfo);
 
    m_ownAddress = nodeInfo->GetMacAddress();
    m_nodeInfo = nodeInfo;
}
 
double
SatPhyRxCarrier::CalculateSinr(double rxPowerW,
                               double ifPowerW,
                               double rxNoisePowerW,
                               double rxAciIfPowerW,
                               double rxExtNoisePowerW,
                               double additionalInterference)
{
    NS_LOG_FUNCTION(this << rxPowerW << ifPowerW);
 
    if (rxNoisePowerW <= 0.0)
    {
        NS_FATAL_ERROR("Noise power must be greater than zero!!! Current value is "
                       << rxNoisePowerW);
    }
 
    // Calculate first SINR based on co-channel interference, Adjacent channel interference, noise
    // and external noise NOTE! ACI noise power and Ext noise power are set 0 by default and given
    // as attributes by PHY object when used.
    double sinr = rxPowerW / (ifPowerW + rxNoisePowerW + rxAciIfPowerW + rxExtNoisePowerW);
 
    // Call PHY calculator to composite C over I interference configured to PHY.
    double finalSinr = (1 / (1 / sinr + 1 / additionalInterference));
 
    return finalSinr;
}
 
double
SatPhyRxCarrier::CalculateSinr(double sinr, double otherInterference)
{
    NS_LOG_FUNCTION(this << sinr << otherInterference);
 
    if (sinr <= 0)
    {
        NS_FATAL_ERROR("Calculated own SINR is expected to be greater than zero!!!");
    }
 
    if (otherInterference <= 0)
    {
        NS_FATAL_ERROR("Interference is expected to be greater than zero!!!");
    }
 
    double finalSinr = 1 / ((1 / sinr) + (1 / otherInterference));
 
    return finalSinr;
}
 
double
SatPhyRxCarrier::CalculateCompositeSinr(double sinr1, double sinr2)
{
    NS_LOG_FUNCTION(this << sinr1 << sinr2);
 
    if (sinr1 <= 0.0)
    {
        NS_FATAL_ERROR("SINR 1 must be greater than zero!!!");
    }
 
    if (sinr2 <= 0.0)
    {
        NS_FATAL_ERROR("SINR 2 must be greater than zero!!!");
    }
 
    return 1.0 / ((1.0 / sinr1) + (1.0 / sinr2));
}
 
double
SatPhyRxCarrier::GetWorstSinr(double sinr1, double sinr2)
{
    NS_LOG_FUNCTION(this << sinr1 << sinr2);
 
    if (sinr1 <= 0.0)
    {
        NS_FATAL_ERROR("SINR 1 must be greater than zero!!! Current value is " << sinr1);
    }
 
    if (sinr2 <= 0.0)
    {
        NS_FATAL_ERROR("SINR 2 must be greater than zero!!! Current value is " << sinr2);
    }
 
    return std::min(sinr1, sinr2);
}
 
void
SatPhyRxCarrier::IncreaseNumOfRxState(SatEnums::PacketType_t packetType)
{
    NS_LOG_FUNCTION(this);
 
    m_numOfOngoingRx++;
    ChangeState(RX);
 
    if (packetType == SatEnums::PACKET_TYPE_DEDICATED_ACCESS)
    {
        m_receivingDedicatedAccess = true;
    }
 
    CheckRxStateSanity();
}
 
void
SatPhyRxCarrier::DecreaseNumOfRxState(SatEnums::PacketType_t packetType)
{
    NS_LOG_FUNCTION(this);
 
    if (m_numOfOngoingRx > 0)
    {
        m_numOfOngoingRx--;
    }
 
    if (m_numOfOngoingRx < 1)
    {
        ChangeState(IDLE);
    }
 
    if (packetType == SatEnums::PACKET_TYPE_DEDICATED_ACCESS)
    {
        m_receivingDedicatedAccess = false;
    }
 
    CheckRxStateSanity();
}
 
void
SatPhyRxCarrier::CheckRxStateSanity()
{
    NS_LOG_FUNCTION(this);
 
    if (m_numOfOngoingRx > 0 && m_state == IDLE)
    {
        NS_FATAL_ERROR("SatPhyRxCarrier::CheckStateSanity - State mismatch");
    }
 
    if (m_numOfOngoingRx < 1 && m_state == RX)
    {
        NS_FATAL_ERROR("SatPhyRxCarrier::CheckStateSanity - State mismatch");
    }
}
 
void
SatPhyRxCarrier::SetAverageNormalizedOfferedLoadCallback(
    SatPhyRx::AverageNormalizedOfferedLoadCallback callback)
{
    NS_LOG_FUNCTION(this << &callback);
 
    m_avgNormalizedOfferedLoadCallback = callback;
}
 
} // namespace ns3