Problem facing using IEEE 802.11p

[Moyukh Laha]

I have used the following code for using 802.11p

void
DtnExample::CreateDevices ()
{
  Config::SetDefault ("ns3::WifiRemoteStationManager::NonUnicastMode",StringValue ("ErpOfdmRate6Mbps"));
  Config::SetDefault ("ns3::WifiRemoteStationManager::RtsCtsThreshold", StringValue ("0"));
  Wifi80211pHelper pHelper;
  pHelper.SetStandard (WIFI_PHY_STANDARD_80211_20MHZ);
  YansWifiPhyHelper wifiPhy =  YansWifiPhyHelper::Default ();
  YansWifiChannelHelper wifiChannel;
  wifiChannel.SetPropagationDelay ("ns3::ConstantSpeedPropagationDelayModel");
  wifiChannel.AddPropagationLoss ("ns3::FriisPropagationLossModel");
  wifiPhy.SetChannel (wifiChannel.Create ());

  NqosWave80211pMacHelper wifi80211pMac = NqosWave80211pMacHelper::Default();
 
  pHelper.SetRemoteStationManager ("ns3::IdealWifiManager");
  wifiPhy.Set ("TxPowerLevels", UintegerValue (1) ); // default: 1
  wifiPhy.Set ("TxPowerStart",DoubleValue (12.5)); // default: 16.0206
  wifiPhy.Set ("TxPowerEnd", DoubleValue (12.5)); // default: 16.0206
  wifiPhy.Set ("EnergyDetectionThreshold", DoubleValue (-74.5) ); // default: -96
  wifiPhy.Set ("CcaMode1Threshold", DoubleValue (-77.5) ); // default: -99
  wifiPhy.Set ("RxNoiseFigure", DoubleValue (7) ); // default: 7
  wifiPhy.Set ("TxGain", DoubleValue (1.0) ); // default: 1.0
  wifiPhy.Set ("RxGain", DoubleValue (1.0) ); // deafult: 1.0

  wifi80211pMac.SetType ("ns3::AdhocWifiMac");
 
  devices = pHelper.Install (wifiPhy, wifi80211pMac, nodes);
 
  if (pcap)
    wifiPhy.EnablePcapAll (std::string ("rtprot"));
}


 But I am getting the following error while simulating it-

../examples/DTN_SF_UDP/my_dtn.cc: In member function ‘void DtnExample::CreateDevices()’:
../examples/DTN_SF_UDP/my_dtn.cc:1422:24: error: ‘WIFI_PHY_STANDARD_80211_20MHZ’ was not declared in this scope
   pHelper.SetStandard (WIFI_PHY_STANDARD_80211_20MHZ);
                        ^
../examples/DTN_SF_UDP/my_dtn.cc:1439:3: error: ‘NqosWave80211pMacHelper’ was not declared in this scope
   NqosWave80211pMacHelper wifi80211pMac = NqosWave80211pMacHelper::Default();
   ^
../examples/DTN_SF_UDP/my_dtn.cc:1453:3: error: ‘wifi80211pMac’ was not declared in this scope
   wifi80211pMac.SetType ("ns3::AdhocWifiMac");
   ^

Please Help. Thanks

[Konstantinos]

Hi,

From what I can see, you are working on a non stadard ns-3 codebase, therefore my replies may not apply.

I'm answering only based on the standard ns-3 (ns-3-dev repository).

- There is no 20Mhz standard in the ns-3 codebase

Please refer here for the list of available standards https://www.nsnam.org/docs/doxygen/group__wifi.html#ga1299834f4e1c615af3ca738033b76a49 

- Further, there is no class "NqosWave80211pMacHelper". There is just NqosWaveMacHelper (without the 80211p).or Wifi80211pHelper (without the Wave).

Regards,

K

[Moyukh Laha]

Thanks Konstantinos. I have made the following changes:

void
DtnExample::CreateDevices ()
{
  Config::SetDefault ("ns3::WifiRemoteStationManager::NonUnicastMode",StringValue ("ErpOfdmRate6Mbps"));
  Config::SetDefault ("ns3::WifiRemoteStationManager::RtsCtsThreshold", StringValue ("0"));

  //WifiHelper wifi;

  Wifi80211pHelper p;
  p.SetStandard (WIFI_PHY_STANDARD_80211_10MHZ);

  YansWifiPhyHelper wifiPhy =  YansWifiPhyHelper::Default ();
  YansWifiChannelHelper wifiChannel;
  wifiChannel.SetPropagationDelay ("ns3::ConstantSpeedPropagationDelayModel");
  wifiChannel.AddPropagationLoss ("ns3::FriisPropagationLossModel");
  wifiPhy.SetChannel (wifiChannel.Create ());

  QosWaveMacHelper pMac = QosWaveMacHelper::Default();
 
//QosWifiMacHelper wifiMac = QosWifiMacHelper::Default ();
  p.SetRemoteStationManager ("ns3::IdealWifiManager");

  wifiPhy.Set ("TxPowerLevels", UintegerValue (1) ); // default: 1
  wifiPhy.Set ("TxPowerStart",DoubleValue (12.5)); // default: 16.0206
  wifiPhy.Set ("TxPowerEnd", DoubleValue (12.5)); // default: 16.0206
  wifiPhy.Set ("EnergyDetectionThreshold", DoubleValue (-74.5) ); // default: -96
  wifiPhy.Set ("CcaMode1Threshold", DoubleValue (-77.5) ); // default: -99
  wifiPhy.Set ("RxNoiseFigure", DoubleValue (7) ); // default: 7
  wifiPhy.Set ("TxGain", DoubleValue (1.0) ); // default: 1.0
  wifiPhy.Set ("RxGain", DoubleValue (1.0) ); // deafult: 1.0

  pMac.SetType ("ns3::AdhocWifiMac");
 

  devices = p.Install (wifiPhy, pMac, nodes);

 
  //devices = wifi.Install (wifiPhy, wifiMac, nodes);

 
  if (pcap)
    wifiPhy.EnablePcapAll (std::string ("rtprot"));
}

And also  done this ----------   #include "ns3/wave-module.h"

But still getting the error:


examples/DTN_SF_UDP/my_dtn.cc.1.o: In function `DtnExample::CreateDevices()':
/home/moyukh/ns-allinone-3.22/ns-3.22/build/../examples/DTN_SF_UDP/my_dtn.cc:1423: undefined reference to `ns3::Wifi80211pHelper::Wifi80211pHelper()'
/home/moyukh/ns-allinone-3.22/ns-3.22/build/../examples/DTN_SF_UDP/my_dtn.cc:1424: undefined reference to `ns3::Wifi80211pHelper::SetStandard(ns3::WifiPhyStandard)'
/home/moyukh/ns-allinone-3.22/ns-3.22/build/../examples/DTN_SF_UDP/my_dtn.cc:1433: undefined reference to `ns3::QosWaveMacHelper::Default()'
/home/moyukh/ns-allinone-3.22/ns-3.22/build/../examples/DTN_SF_UDP/my_dtn.cc:1446: undefined reference to `ns3::QosWaveMacHelper::SetType(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, ns3::AttributeValue const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, ns3::AttributeValue const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, ns3::AttributeValue const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, ns3::AttributeValue const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, ns3::AttributeValue const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, ns3::AttributeValue const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, ns3::AttributeValue const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, ns3::AttributeValue const&)'
/home/moyukh/ns-allinone-3.22/ns-3.22/build/../examples/DTN_SF_UDP/my_dtn.cc:1448: undefined reference to `ns3::Wifi80211pHelper::Install(ns3::WifiPhyHelper const&, ns3::WifiMacHelper const&, ns3::NodeContainer) const'
/home/moyukh/ns-allinone-3.22/ns-3.22/build/../examples/DTN_SF_UDP/my_dtn.cc:1433: undefined reference to `ns3::QosWaveMacHelper::~QosWaveMacHelper()'
/home/moyukh/ns-allinone-3.22/ns-3.22/build/../examples/DTN_SF_UDP/my_dtn.cc:1423: undefined reference to `ns3::Wifi80211pHelper::~Wifi80211pHelper()'
/home/moyukh/ns-allinone-3.22/ns-3.22/build/../examples/DTN_SF_UDP/my_dtn.cc:1433: undefined reference to `ns3::QosWaveMacHelper::~QosWaveMacHelper()'
/home/moyukh/ns-allinone-3.22/ns-3.22/build/../examples/DTN_SF_UDP/my_dtn.cc:1423: undefined reference to `ns3::Wifi80211pHelper::~Wifi80211pHelper()'
collect2: error: ld returned 1 exit status

Can't get why this is happening. Please help. Thanks.

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[Konstantinos]

Hi,

As I have already mentioned, you are working on an un-supported code-base; I don't know the DTN modifications, you are using ns-3.22 as base (old release, we are now on ns-3.26).

Adding the header files is not the only requirement for linking the modules. You need to add the corresponding dependencies in the wscript file. Also note that after modifying a wscript a file, you need to re-configure your ns-3.

Regards,

K 

[Moyukh Laha]

Thank you Sir.

Can you help me with how to re-configure/edit wscript/ns3 to make it work? any tutorial/source for that.

Actually that DTN code is only supported in 3.22 and I cant shift to 3.26.

The following is the updated code:

DtnExample::CreateDevices ()      
{

 
  YansWifiPhyHelper wifiPhy =  YansWifiPhyHelper::Default ();
  YansWifiChannelHelper wifiChannel;
  wifiChannel.SetPropagationDelay ("ns3::ConstantSpeedPropagationDelayModel");
  wifiChannel.AddPropagationLoss ("ns3::FriisPropagationLossModel");
  wifiPhy.SetChannel (wifiChannel.Create ());

  QosWaveMacHelper wifi80211pMac = QosWaveMacHelper::Default ();
  Wifi80211pHelper wifi80211p = Wifi80211pHelper::Default ();
  wifi80211p.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
                                      "DataMode",StringValue ("OfdmRate6MbpsBW10MHz"),
                                      "ControlMode",StringValue ("OfdmRate6MbpsBW10MHz"));

  wifiPhy.Set ("TxPowerLevels", UintegerValue (1) ); // default: 1
  wifiPhy.Set ("TxPowerStart",DoubleValue (12.5)); // default: 16.0206
  wifiPhy.Set ("TxPowerEnd", DoubleValue (12.5)); // default: 16.0206
  wifiPhy.Set ("EnergyDetectionThreshold", DoubleValue (-74.5) ); // default: -96
  wifiPhy.Set ("CcaMode1Threshold", DoubleValue (-77.5) ); // default: -99
  wifiPhy.Set ("RxNoiseFigure", DoubleValue (7) ); // default: 7
  wifiPhy.Set ("TxGain", DoubleValue (1.0) ); // default: 1.0
  wifiPhy.Set ("RxGain", DoubleValue (1.0) ); // deafult: 1.0

  devices = wifi80211p.Install (wifiPhy, wifi80211pMac, nodes);
}

But getting this error:

DTN_my/test-dtn-wave.cc:1494: undefined reference to `ns3::QosWaveMacHelper::Default()'
/DTN_my/test-dtn-wave.cc:1495: undefined reference to `ns3::Wifi80211pHelper::Default()'
/DTN_my/test-dtn-wave.cc:1512: undefined reference to `ns3::Wifi80211pHelper::Install(ns3::WifiPhyHelper const&, ns3::WifiMacHelper const&, ns3::NodeContainer) const'
/DTN_my/test-dtn-wave.cc:1495: undefined reference to `ns3::Wifi80211pHelper::~Wifi80211pHelper()'
/DTN_my/test-dtn-wave.cc:1494: undefined reference to `ns3::QosWaveMacHelper::~QosWaveMacHelper()'
/DTN_my/test-dtn-wave.cc:1495: undefined reference to `ns3::Wifi80211pHelper::~Wifi80211pHelper()'
/DTN_my/test-dtn-wave.cc:1494: undefined reference to `ns3::QosWaveMacHelper::~QosWaveMacHelper()'

Thank you.

[Konstantinos]

To re-configure ns-3, you simply call "./waf configure" followed by any other parameters that you did the first time you configured, e.g. enable examples, tests, etc.

It is documented in the tutorial.