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PHY synchronization

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This commit is contained in:
Nicola Baldo
2011-03-15 20:01:50 +01:00
parent 34ff1d296e
commit efc7ef8268
7 changed files with 124 additions and 46 deletions
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69
src/lte/examples/inter-cell-interference.cc Normal file
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@@ -0,0 +1,69 @@
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
*
* 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: Manuel Requena <manuel.requena@cttc.es>
* Nicola Baldo <nbaldo@cttc.es>
*/
#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/mobility-module.h"
#include "ns3/lte-module.h"
using namespace ns3;
int main (int argc, char *argv[])
{
LenaHelper lena;
lena.EnableLogComponents ();
// Create Nodes: eNodeB and UE
NodeContainer enbNodes;
NodeContainer ueNodes;
enbNodes.Create (1);
ueNodes.Create (1);
// Install Mobility Model
MobilityHelper mobility;
mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
mobility.Install (enbNodes);
mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
mobility.Install (ueNodes);
// Create Devices and install them in the Nodes (eNB and UE)
NetDeviceContainer enbDevs;
NetDeviceContainer ueDevs;
enbDevs = lena.InstallEnbDevice (enbNodes);
ueDevs = lena.InstallUeDevice (ueNodes);
// Attach a UE to a eNB
lena.Attach (ueDevs, enbDevs.Get (0));
// Activate an EPS bearer
enum EpsBearer::Qci q = EpsBearer::GBR_CONV_VOICE;
EpsBearer bearer (q);
lena.ActivateEpsBearer (ueDevs, bearer);
Simulator::Stop (Seconds (0.004));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}

3
src/lte/model/lte-phy.h
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@@ -246,7 +246,8 @@ public:
private:
protected:
Ptr<LteNetDevice> m_netDevice;
Ptr<LteSpectrumPhy> m_downlinkSpectrumPhy;

79
src/lte/model/lte-spectrum-phy.cc
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@@ -236,7 +236,7 @@ bool
LteSpectrumPhy::StartTx (Ptr<PacketBurst> pb)
{
NS_LOG_FUNCTION (this << pb);
NS_LOG_LOGIC (this << "state: " << m_state);
NS_LOG_LOGIC (this << " state: " << m_state);
for (std::list<Ptr<Packet> >::const_iterator iter = pb->Begin (); iter
@@ -296,7 +296,7 @@ void
LteSpectrumPhy::EndTx ()
{
NS_LOG_FUNCTION (this);
NS_LOG_LOGIC (this << "state: " << m_state);
NS_LOG_LOGIC (this << " state: " << m_state);
NS_ASSERT (m_state == TX);
@@ -326,7 +326,7 @@ void
LteSpectrumPhy::StartRx (Ptr<PacketBurst> pb, Ptr <const SpectrumValue> rxPsd, SpectrumType st, Time duration)
{
NS_LOG_FUNCTION (this << pb << rxPsd << st << duration);
NS_LOG_LOGIC (this << "state: " << m_state);
NS_LOG_LOGIC (this << " state: " << m_state);
m_interference.AddSignal (rxPsd, duration);
@@ -337,51 +337,54 @@ LteSpectrumPhy::StartRx (Ptr<PacketBurst> pb, Ptr <const SpectrumValue> rxPsd, S
switch (m_state)
{
case TX:
/*
* NS FATAL ERROR: according to FDD channel acces,
* the physical layer for reception cannot be used for transmission.
*/
NS_FATAL_ERROR ("FDD ERROR: TX State while receiving packet");
NS_FATAL_ERROR ("cannot RX while TX: according to FDD channel acces, the physical layer for transmission cannot be used for reception");
break;
case RX:
break;
case IDLE:
// To check if we're synchronized to this signal, we check
// for the CellId which is reported in the LtePhyTag
NS_ASSERT (pb->Begin () != pb->End ());
LtePhyTag tag;
Ptr<Packet> firstPacketInBurst = *(pb->Begin ());
firstPacketInBurst->RemovePacketTag (tag);
if (tag.GetCellId () == m_cellId)
{
// we're synchronized with this signal
ChangeState (RX);
{
// To check if we're synchronized to this signal, we check
// for the CellId which is reported in the LtePhyTag
NS_ASSERT (pb->Begin () != pb->End ());
LtePhyTag tag;
Ptr<Packet> firstPacketInBurst = *(pb->Begin ());
firstPacketInBurst->RemovePacketTag (tag);
if (tag.GetCellId () == m_cellId)
{
NS_LOG_LOGIC (this << " synchronized with this signal (cellId=" << tag.GetCellId () << ")");
ChangeState (RX);
m_interference.StartRx (rxPsd);
m_interference.StartRx (rxPsd);
for (std::list<Ptr<Packet> >::const_iterator iter = pb->Begin (); iter
!= pb->End (); ++iter)
{
Ptr<Packet> packet = (*iter)->Copy ();
m_phyRxStartTrace (packet);
}
for (std::list<Ptr<Packet> >::const_iterator iter = pb->Begin (); iter
!= pb->End (); ++iter)
{
Ptr<Packet> packet = (*iter)->Copy ();
m_phyRxStartTrace (packet);
}
m_rxPacketBurst = pb;
m_rxPsd = rxPsd;
m_rxPacketBurst = pb;
m_rxPsd = rxPsd;
NS_LOG_LOGIC (this << " scheduling EndRx with delay " << duration);
m_endRxEventId = Simulator::Schedule (duration, &LteSpectrumPhy::EndRx, this);
break;
}
NS_LOG_LOGIC (this << " scheduling EndRx with delay " << duration);
m_endRxEventId = Simulator::Schedule (duration, &LteSpectrumPhy::EndRx, this);
}
else
{
NS_LOG_LOGIC (this << " not in sync with this signal (cellId="
<< tag.GetCellId () << ", m_cellId=" << m_cellId << ")");
}
}
break;
default:
NS_FATAL_ERROR ("unknown state");
break;
}
NS_LOG_LOGIC (this << "state: " << m_state);
NS_LOG_LOGIC (this << " state: " << m_state);
}
}
@@ -389,7 +392,7 @@ void
LteSpectrumPhy::AbortRx ()
{
NS_LOG_FUNCTION (this);
NS_LOG_LOGIC (this << "state: " << m_state);
NS_LOG_LOGIC (this << " state: " << m_state);
NS_ASSERT (m_state == RX);
@@ -410,7 +413,7 @@ void
LteSpectrumPhy::EndRx ()
{
NS_LOG_FUNCTION (this);
NS_LOG_LOGIC (this << "state: " << m_state);
NS_LOG_LOGIC (this << " state: " << m_state);
NS_ASSERT (m_state == RX);

3
src/lte/model/lte-ue-net-device.cc
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@@ -144,6 +144,9 @@ LteUeNetDevice::SetTargetEnb (Ptr<LteEnbNetDevice> enb)
{
NS_LOG_FUNCTION (this << enb);
m_targetEnb = enb;
// WILD HACK - should go through RRC and then through PHY SAP
m_phy->DoSetCellId (enb->GetCellId ());
}

2
src/lte/model/lte-ue-net-device.h
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@@ -100,6 +100,8 @@ private:
Ptr<LteUeMac> m_mac;
Ptr<LteUePhy> m_phy;
Ptr<LteUeRrc> m_rrc;
};
} // namespace ns3

6
src/lte/model/lte-ue-phy.cc
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@@ -365,9 +365,11 @@ LteUePhy::SubframeIndication (uint32_t frameNo, uint32_t subframeNo)
void
LteUePhy::SetTargetEnb (Ptr<LteEnbPhy> enbPhy)
LteUePhy::SetEnbCellId (uint16_t cellId)
{
m_targetEnbPhy = enbPhy;
m_enbCellId = cellId;
m_downlinkSpectrumPhy->SetCellId (cellId);
m_uplinkSpectrumPhy->SetCellId (cellId);
}

8
src/lte/model/lte-ue-phy.h
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@@ -145,12 +145,11 @@ public:
/**
* set the eNB this PHY is synchronized with
* set the cellId of the eNb this PHY is synchronized with
*
* \param enbPhy a pointer to the PHY of the eNB, used for exchanging control messages
* \param cellId the cell identifier of the eNB
*/
void SetTargetEnb (Ptr<LteEnbPhy> enbPhy);
void SetEnbCellId (uint16_t cellId);
private:
@@ -165,8 +164,7 @@ private:
uint16_t m_rnti;
Ptr<LteEnbPhy> m_targetEnbPhy;
uint16_t m_cellId;
uint16_t m_enbCellId;
};