satellite-geo-feeder-phy.cc

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013 Magister Solutions Ltd.
 *
 * 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: Sami Rantanen <sami.rantanen@magister.fi>
 *         Bastien Tauran <bastien.tauran@viveris.fr>
 */
 
#include "satellite-geo-feeder-phy.h"
 
#include "satellite-address-tag.h"
#include "satellite-channel-estimation-error-container.h"
#include "satellite-channel.h"
#include "satellite-mac.h"
#include "satellite-phy-rx.h"
#include "satellite-phy-tx.h"
#include "satellite-signal-parameters.h"
#include "satellite-time-tag.h"
#include "satellite-uplink-info-tag.h"
#include "satellite-utils.h"
 
#include <ns3/double.h>
#include <ns3/enum.h>
#include <ns3/log.h>
#include <ns3/pointer.h>
#include <ns3/simulator.h>
#include <ns3/uinteger.h>
 
#include <limits>
 
NS_LOG_COMPONENT_DEFINE("SatGeoFeederPhy");
 
namespace ns3
{
 
NS_OBJECT_ENSURE_REGISTERED(SatGeoFeederPhy);
 
TypeId
SatGeoFeederPhy::GetTypeId(void)
{
    static TypeId tid =
        TypeId("ns3::SatGeoFeederPhy")
            .SetParent<SatPhy>()
            .AddConstructor<SatGeoFeederPhy>()
            .AddAttribute("PhyRx",
                          "The PhyRx layer attached to this phy.",
                          PointerValue(),
                          MakePointerAccessor(&SatPhy::GetPhyRx, &SatPhy::SetPhyRx),
                          MakePointerChecker<SatPhyRx>())
            .AddAttribute("PhyTx",
                          "The PhyTx layer attached to this phy.",
                          PointerValue(),
                          MakePointerAccessor(&SatPhy::GetPhyTx, &SatPhy::SetPhyTx),
                          MakePointerChecker<SatPhyTx>())
            .AddAttribute("RxTemperatureDbk",
                          "RX noise temperature in Geo Feeder in dBK.",
                          DoubleValue(28.4),
                          MakeDoubleAccessor(&SatPhy::GetRxNoiseTemperatureDbk,
                                             &SatPhy::SetRxNoiseTemperatureDbk),
                          MakeDoubleChecker<double>())
            .AddAttribute(
                "RxMaxAntennaGainDb",
                "Maximum RX gain in dB",
                DoubleValue(54.00),
                MakeDoubleAccessor(&SatPhy::GetRxAntennaGainDb, &SatPhy::SetRxAntennaGainDb),
                MakeDoubleChecker<double_t>())
            .AddAttribute(
                "TxMaxAntennaGainDb",
                "Maximum TX gain in dB",
                DoubleValue(54.00),
                MakeDoubleAccessor(&SatPhy::GetTxAntennaGainDb, &SatPhy::SetTxAntennaGainDb),
                MakeDoubleChecker<double_t>())
            .AddAttribute("TxMaxPowerDbw",
                          "Maximum TX power in dB",
                          DoubleValue(-4.38),
                          MakeDoubleAccessor(&SatPhy::GetTxMaxPowerDbw, &SatPhy::SetTxMaxPowerDbw),
                          MakeDoubleChecker<double>())
            .AddAttribute(
                "TxOutputLossDb",
                "TX Output loss in dB",
                DoubleValue(1.75),
                MakeDoubleAccessor(&SatPhy::GetTxOutputLossDb, &SatPhy::SetTxOutputLossDb),
                MakeDoubleChecker<double>())
            .AddAttribute(
                "TxPointingLossDb",
                "TX Pointing loss in dB",
                DoubleValue(0.00),
                MakeDoubleAccessor(&SatPhy::GetTxPointingLossDb, &SatPhy::SetTxPointingLossDb),
                MakeDoubleChecker<double>())
            .AddAttribute("TxOboLossDb",
                          "TX OBO loss in dB",
                          DoubleValue(4.00),
                          MakeDoubleAccessor(&SatPhy::GetTxOboLossDb, &SatPhy::SetTxOboLossDb),
                          MakeDoubleChecker<double>())
            .AddAttribute(
                "TxAntennaLossDb",
                "TX Antenna loss in dB",
                DoubleValue(1.00),
                MakeDoubleAccessor(&SatPhy::GetTxAntennaLossDb, &SatPhy::SetTxAntennaLossDb),
                MakeDoubleChecker<double>())
            .AddAttribute(
                "RxAntennaLossDb",
                "RX Antenna loss in dB",
                DoubleValue(1.00),
                MakeDoubleAccessor(&SatPhy::GetRxAntennaLossDb, &SatPhy::SetRxAntennaLossDb),
                MakeDoubleChecker<double>())
            .AddAttribute("DefaultFadingValue",
                          "Default value for fading",
                          DoubleValue(1.00),
                          MakeDoubleAccessor(&SatPhy::GetDefaultFading, &SatPhy::SetDefaultFading),
                          MakeDoubleChecker<double_t>())
            .AddAttribute("ExtNoisePowerDensityDbwhz",
                          "Other system interference, C over I in dB.",
                          DoubleValue(-207.0),
                          MakeDoubleAccessor(&SatGeoFeederPhy::m_extNoisePowerDensityDbwHz),
                          MakeDoubleChecker<double>())
            .AddAttribute("ImIfCOverIDb",
                          "Adjacent channel interference, C over I in dB.",
                          DoubleValue(27.0),
                          MakeDoubleAccessor(&SatGeoFeederPhy::m_imInterferenceCOverIDb),
                          MakeDoubleChecker<double>())
            .AddAttribute("FixedAmplificationGainDb",
                          "Fixed amplification gain used in RTN link at the satellite.",
                          DoubleValue(82.0),
                          MakeDoubleAccessor(&SatGeoFeederPhy::m_fixedAmplificationGainDb),
                          MakeDoubleChecker<double>())
            .AddAttribute("QueueSize",
                          "Maximum size of FIFO m_queue in bytes.",
                          UintegerValue(100000),
                          MakeUintegerAccessor(&SatGeoFeederPhy::m_queueSizeMax),
                          MakeUintegerChecker<uint32_t>())
            .AddTraceSource("QueueSizeBytes",
                            "Send number of bytes in FIFO return feeder queue",
                            MakeTraceSourceAccessor(&SatGeoFeederPhy::m_queueSizeBytesTrace),
                            "ns3::SatStatsRtnFeederQueueHelper::QueueSizeCallback")
            .AddTraceSource("QueueSizePackets",
                            "Send number of packets in FIFO return feeder queue",
                            MakeTraceSourceAccessor(&SatGeoFeederPhy::m_queueSizePacketsTrace),
                            "ns3::SatStatsRtnFeederQueueHelper::QueueSizeCallback");
    return tid;
}
 
TypeId
SatGeoFeederPhy::GetInstanceTypeId(void) const
{
    NS_LOG_FUNCTION(this);
 
    return GetTypeId();
}
 
SatGeoFeederPhy::SatGeoFeederPhy(void)
    : m_extNoisePowerDensityDbwHz(-207.0),
      m_imInterferenceCOverIDb(27.0),
      m_imInterferenceCOverI(SatUtils::DbToLinear(m_imInterferenceCOverIDb)),
      m_fixedAmplificationGainDb(82.0),
      m_queueSizeBytes(0),
      m_queueSizePackets(0)
{
    NS_LOG_FUNCTION(this);
    NS_FATAL_ERROR("SatGeoFeederPhy default constructor is not allowed to use");
}
 
SatGeoFeederPhy::SatGeoFeederPhy(SatPhy::CreateParam_t& params,
                                 Ptr<SatLinkResults> linkResults,
                                 SatPhyRxCarrierConf::RxCarrierCreateParams_s parameters,
                                 Ptr<SatSuperframeConf> superFrameConf,
                                 SatEnums::RegenerationMode_t forwardLinkRegenerationMode,
                                 SatEnums::RegenerationMode_t returnLinkRegenerationMode)
    : SatPhy(params)
{
    NS_LOG_FUNCTION(this);
 
    m_forwardLinkRegenerationMode = forwardLinkRegenerationMode;
    m_returnLinkRegenerationMode = returnLinkRegenerationMode;
    m_isSending = false;
    m_queueSizeBytes = 0;
    m_queueSizePackets = 0;
 
    if (m_returnLinkRegenerationMode == SatEnums::REGENERATION_PHY)
    {
        m_queue = std::queue<std::tuple<Ptr<SatSignalParameters>, uint32_t, uint32_t>>();
    }
 
    if (m_returnLinkRegenerationMode == SatEnums::TRANSPARENT)
    {
        SatPhy::GetPhyTx()->SetAttribute("TxMode", EnumValue(SatPhyTx::TRANSPARENT));
    }
    else
    {
        SatPhy::GetPhyTx()->SetAttribute("TxMode", EnumValue(SatPhyTx::NORMAL));
    }
 
    ObjectBase::ConstructSelf(AttributeConstructionList());
 
    m_imInterferenceCOverI = SatUtils::DbToLinear(m_imInterferenceCOverIDb);
 
    // Configure the SatPhyRxCarrier instances
    // Note, that in GEO satellite, there is no need for error modeling.
 
    parameters.m_rxTemperatureK = SatUtils::DbToLinear(SatPhy::GetRxNoiseTemperatureDbk());
    parameters.m_extNoiseDensityWhz = SatUtils::DbToLinear(m_extNoisePowerDensityDbwHz);
    parameters.m_aciIfWrtNoiseFactor = 0.0;
    if (forwardLinkRegenerationMode == SatEnums::TRANSPARENT)
    {
        parameters.m_rxMode = SatPhyRxCarrierConf::TRANSPARENT;
    }
    else
    {
        parameters.m_rxMode = SatPhyRxCarrierConf::NORMAL;
    }
    parameters.m_linkRegenerationMode = forwardLinkRegenerationMode;
    parameters.m_chType = SatEnums::FORWARD_FEEDER_CH;
 
    Ptr<SatPhyRxCarrierConf> carrierConf = CreateObject<SatPhyRxCarrierConf>(parameters);
 
    if (linkResults)
    {
        carrierConf->SetLinkResults(linkResults);
    }
 
    carrierConf->SetAdditionalInterferenceCb(
        MakeCallback(&SatGeoFeederPhy::GetAdditionalInterference, this));
 
    SatPhy::ConfigureRxCarriers(carrierConf, superFrameConf);
}
 
SatGeoFeederPhy::~SatGeoFeederPhy()
{
    NS_LOG_FUNCTION(this);
}
 
void
SatGeoFeederPhy::DoDispose()
{
    NS_LOG_FUNCTION(this);
    Object::DoDispose();
}
 
void
SatGeoFeederPhy::DoInitialize()
{
    NS_LOG_FUNCTION(this);
    Object::DoInitialize();
}
 
void
SatGeoFeederPhy::SendPduWithParams(Ptr<SatSignalParameters> txParams)
{
    NS_LOG_FUNCTION(this << txParams);
    NS_LOG_INFO(this << " sending a packet with carrierId: " << txParams->m_carrierId
                     << " duration: " << txParams->m_duration);
 
    if (m_returnLinkRegenerationMode != SatEnums::TRANSPARENT)
    {
        SetTimeTag(txParams->m_packetsInBurst);
    }
 
    // copy as sender own PhyTx object (at satellite) to ensure right distance calculation
    // and antenna gain getting at receiver (UT or GW)
    // copy on tx power too.
 
    txParams->m_phyTx = m_phyTx;
 
    if (m_returnLinkRegenerationMode == SatEnums::TRANSPARENT)
    {
        txParams->m_txPower_W =
            txParams->m_rxPower_W * SatUtils::DbToLinear(m_fixedAmplificationGainDb);
    }
    else
    {
        txParams->m_txPower_W = m_eirpWoGainW;
    }
 
    NS_LOG_INFO("Amplified Tx power: " << SatUtils::LinearToDb(txParams->m_txPower_W));
    NS_LOG_INFO("Statically configured tx power: " << SatUtils::LinearToDb(m_eirpWoGainW));
 
    SatEnums::SatPacketEvent_t event;
 
    if (m_returnLinkRegenerationMode == SatEnums::REGENERATION_PHY)
    {
        uint32_t nbBytes = 0;
        for (Ptr<Packet> pkt : txParams->m_packetsInBurst)
        {
            nbBytes += pkt->GetSize();
        }
        uint32_t nbPackets = txParams->m_packetsInBurst.size();
        if (m_queueSizeBytes + nbBytes < m_queueSizeMax)
        {
            event = SatEnums::PACKET_ENQUE;
            m_queue.push(std::make_tuple(txParams, nbBytes, nbPackets));
            m_queueSizeBytes += nbBytes;
            m_queueSizePackets += nbPackets;
 
            m_queueSizeBytesTrace(m_queueSizeBytes,
                                  GetE2ESourceAddress(txParams->m_packetsInBurst));
            m_queueSizePacketsTrace(m_queueSizePackets,
                                    GetE2ESourceAddress(txParams->m_packetsInBurst));
 
            if (m_isSending == false)
            {
                SendFromQueue();
            }
        }
        else
        {
            event = SatEnums::PACKET_DROP;
            NS_LOG_INFO("Packet dropped because REGENERATION_PHY queue is full");
        }
    }
    else
    {
        event = SatEnums::PACKET_SENT;
        m_phyTx->StartTx(txParams);
    }
 
    // Add packet trace entry:
    m_packetTrace(Simulator::Now(),
                  event,
                  m_nodeInfo->GetNodeType(),
                  m_nodeInfo->GetNodeId(),
                  m_nodeInfo->GetMacAddress(),
                  SatEnums::LL_PHY,
                  SatEnums::LD_RETURN,
                  SatUtils::GetPacketInfo(txParams->m_packetsInBurst));
}
 
void
SatGeoFeederPhy::SendFromQueue()
{
    if (m_queue.empty())
    {
        NS_FATAL_ERROR("Trying to deque an empty queue");
    }
    m_isSending = true;
    std::tuple<Ptr<SatSignalParameters>, uint32_t, uint32_t> element = m_queue.front();
    m_queue.pop();
 
    Ptr<SatSignalParameters> txParams = std::get<0>(element);
    m_queueSizeBytes -= std::get<1>(element);
    m_queueSizePackets -= std::get<2>(element);
 
    m_queueSizeBytesTrace(m_queueSizeBytes, GetE2ESourceAddress(txParams->m_packetsInBurst));
    m_queueSizePacketsTrace(m_queueSizePackets, GetE2ESourceAddress(txParams->m_packetsInBurst));
 
    // Add sent packet trace entry:
    m_packetTrace(Simulator::Now(),
                  SatEnums::PACKET_SENT,
                  m_nodeInfo->GetNodeType(),
                  m_nodeInfo->GetNodeId(),
                  m_nodeInfo->GetMacAddress(),
                  SatEnums::LL_PHY,
                  SatEnums::LD_RETURN,
                  SatUtils::GetPacketInfo(txParams->m_packetsInBurst));
 
    Simulator::Schedule(txParams->m_duration + NanoSeconds(1), &SatGeoFeederPhy::EndTx, this);
 
    m_phyTx->StartTx(txParams);
}
 
void
SatGeoFeederPhy::EndTx()
{
    m_isSending = false;
    if (!m_queue.empty())
    {
        this->SendFromQueue();
    }
}
 
void
SatGeoFeederPhy::RxTraces(SatPhy::PacketContainer_t packets)
{
    NS_LOG_FUNCTION(this);
 
    if (m_isStatisticsTagsEnabled)
    {
        SatSignalParameters::PacketsInBurst_t::iterator it1;
        for (it1 = packets.begin(); it1 != packets.end(); ++it1)
        {
            Address addr; // invalid address.
 
            SatAddressE2ETag addressE2ETag;
            if ((*it1)->PeekPacketTag(addressE2ETag))
            {
                NS_LOG_DEBUG(this << " contains a SatMac tag");
                addr = addressE2ETag.GetE2EDestAddress();
            }
 
            m_rxTrace(*it1, addr);
 
            SatPhyLinkTimeTag linkTimeTag;
            if ((*it1)->RemovePacketTag(linkTimeTag))
            {
                NS_LOG_DEBUG(this << " contains a SatPhyLinkTimeTag tag");
                Time delay = Simulator::Now() - linkTimeTag.GetSenderLinkTimestamp();
                m_rxLinkDelayTrace(delay, addr);
                if (m_lastLinkDelay.IsZero() == false)
                {
                    Time jitter = Abs(delay - m_lastLinkDelay);
                    m_rxLinkJitterTrace(jitter, addr);
                }
                m_lastLinkDelay = delay;
            }
 
        } // end of `for (it1 = rxParams->m_packetsInBurst)`
 
    } // end of `if (m_isStatisticsTagsEnabled)`
}
 
void
SatGeoFeederPhy::Receive(Ptr<SatSignalParameters> rxParams, bool phyError)
{
    NS_LOG_FUNCTION(this << rxParams);
 
    SatEnums::SatPacketEvent_t event = (phyError) ? SatEnums::PACKET_DROP : SatEnums::PACKET_RECV;
 
    // Add packet trace entry:
    m_packetTrace(Simulator::Now(),
                  event,
                  m_nodeInfo->GetNodeType(),
                  m_nodeInfo->GetNodeId(),
                  m_nodeInfo->GetMacAddress(),
                  SatEnums::LL_PHY,
                  SatEnums::LD_FORWARD,
                  SatUtils::GetPacketInfo(rxParams->m_packetsInBurst));
 
    if (phyError)
    {
        // If there was a PHY error, the packet is dropped here.
        NS_LOG_INFO(this << " dropped " << rxParams->m_packetsInBurst.size()
                         << " packets because of PHY error.");
    }
    else
    {
        switch (m_forwardLinkRegenerationMode)
        {
        case SatEnums::TRANSPARENT:
            break;
        case SatEnums::REGENERATION_PHY:
        case SatEnums::REGENERATION_NETWORK: {
            rxParams->m_txInfo.packetType = SatEnums::PACKET_TYPE_DEDICATED_ACCESS;
 
            SatSignalParameters::PacketsInBurst_t::iterator it;
            for (it = rxParams->m_packetsInBurst.begin(); it != rxParams->m_packetsInBurst.end();
                 it++)
            {
                SatUplinkInfoTag satUplinkInfoTag;
                (*it)->RemovePacketTag(satUplinkInfoTag);
                satUplinkInfoTag.SetSatId(rxParams->m_satId);
                satUplinkInfoTag.SetBeamId(rxParams->m_beamId);
                (*it)->AddPacketTag(satUplinkInfoTag);
            }
 
            RxTraces(rxParams->m_packetsInBurst);
 
            ModcodTrace(rxParams);
 
            break;
        }
        default:
            NS_FATAL_ERROR("Unknown regeneration mode");
        }
 
        m_rxCallback(rxParams->m_packetsInBurst, rxParams);
    }
}
 
double
SatGeoFeederPhy::GetAdditionalInterference()
{
    NS_LOG_FUNCTION(this);
 
    return m_imInterferenceCOverI;
}
 
SatEnums::SatLinkDir_t
SatGeoFeederPhy::GetSatLinkTxDir()
{
    return SatEnums::LD_RETURN;
}
 
SatEnums::SatLinkDir_t
SatGeoFeederPhy::GetSatLinkRxDir()
{
    return SatEnums::LD_FORWARD;
}
 
Address
SatGeoFeederPhy::GetE2ESourceAddress(SatPhy::PacketContainer_t packets)
{
    SatSignalParameters::PacketsInBurst_t::iterator it1;
    for (it1 = packets.begin(); it1 != packets.end(); ++it1)
    {
        Address addr; // invalid address.
        ByteTagIterator it2 = (*it1)->GetByteTagIterator();
 
        while (it2.HasNext())
        {
            ByteTagIterator::Item item = it2.Next();
 
            if (item.GetTypeId() == SatAddressTag::GetTypeId())
            {
                SatAddressTag addrTag;
                item.GetTag(addrTag);
                return addrTag.GetSourceAddress();
            }
        }
    }
    return Mac48Address();
}
 
} // namespace ns3