Attachment #2607 for bug #2511

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  return false;
}

bool
ApWifiMac::IsNonGfHtStasPresent (void) const
{
  for (std::list<Mac48Address>::const_iterator i = m_staList.begin (); i != m_staList.end (); i++)
  {
    if (m_stationManager->GetGreenfieldSupported (*i) == false)
      {
        return true;
      }
  }
  return false;
}

void
ApWifiMac::ForwardDown (Ptr<const Packet> packet, Mac48Address from,
                        Mac48Address to)

      if (!m_nonHtStations.empty ())
        {
          operations.SetHtProtection (MIXED_MODE_PROTECTION);
          operations.SetNonGfHtStasPresent (IsNonGfHtStasPresent ());
        }
      else
        {

(-)a/src/wifi/model/ap-wifi-mac.h (+5 lines)

Lines 116-121	Link Here

116

   * stations support short PLCP preamble.

116

   * stations support short PLCP preamble.

117

*/

117

*/

118

  bool GetShortPreambleEnabled (void) const;

118

  bool GetShortPreambleEnabled (void) const;

119

/**

120

   * Determine whether non-Greenfield HT stations are present or not.

121

*/

122

  bool IsNonGfHtStasPresent (void) const;

123

119

124

120

/**

125

/**

121

   * Assign a fixed random variable stream number to the random variables

126

   * Assign a fixed random variable stream number to the random variables




  WifiMode payloadMode = event->GetPayloadMode ();
  WifiPreamble preamble = event->GetPreambleType ();
  WifiMode htHeaderMode;
  if (preamble == WIFI_PREAMBLE_HT_MF || preamble == WIFI_PREAMBLE_HT_GF)
    {
      //mode for PLCP header fields sent with HT modulation
      htHeaderMode = WifiPhy::GetHtPlcpHeaderMode (payloadMode);


                  NS_LOG_DEBUG ("Case 3ai - previous is in VHT-SIG-A and current after payload start: VHT mode=" << htHeaderMode << ", non-VHT mode=" << headerMode << ", psr=" << psr);
                }
              //Case 3aii: HT mixed format or HT greenfield
              else
                {
                  psr *= CalculateChunkSuccessRate (CalculateSnr (powerW,


                  NS_LOG_DEBUG ("Case 3bi - previous is in VHT-SIG-A and current is in VHT training or in VHT-SIG-B: VHT mode=" << htHeaderMode << ", non-VHT mode=" << headerMode << ", psr=" << psr);
                }
              //Case 3bii: HT mixed format or HT greenfield
              else
                {
                  psr *= CalculateChunkSuccessRate (CalculateSnr (powerW,


                  NS_LOG_DEBUG ("Case 3ci - previous with current in VHT-SIG-A: VHT mode=" << htHeaderMode << ", non-VHT mode=" << headerMode << ", psr=" << psr);
                }
              //Case 3bii: HT mixed format or HT greenfield
              else
                {
                  psr *= CalculateChunkSuccessRate (CalculateSnr (powerW,

                                                    plcpHsigHeaderStart - plcpHeaderStart, //HT GF: plcpHsigHeaderStart - plcpHeaderStart = 0
                                                    headerMode, event->GetTxVector ());

                  NS_LOG_DEBUG ("Case 5aiii - previous is in the preamble and current is after payload start: HT mode=" << htHeaderMode << ", non-HT mode=" << headerMode << ", psr=" << psr);
                }
            }
          //Case 5b: current is in (V)HT training or in VHT-SIG-B. Non (V)HT will not come here since it went in previous if or if the previous if is not true this will be not true




  if (params.MustSendRts ())
    {
      WifiTxVector rtsTxVector = GetRtsTxVector (packet, hdr);
      if (m_stationManager->GetShortPreambleEnabled ())
      if (m_phy->GetGreenfield () && m_stationManager->GetGreenfieldSupported (m_currentHdr.GetAddr1 ()))
        {
          preamble = WIFI_PREAMBLE_HT_GF;
        }
      //Otherwise, RTS should always use non-HT PPDU (HT PPDU cases not supported yet)
      else if (m_stationManager->GetShortPreambleEnabled ())
        {
          preamble = WIFI_PREAMBLE_SHORT;
        }

    {
      preamble = WIFI_PREAMBLE_VHT;
    }
  else if (dataTxVector.GetMode ().GetModulationClass () == WIFI_MOD_CLASS_HT && m_phy->GetGreenfield () && m_stationManager->GetGreenfieldSupported (m_currentHdr.GetAddr1 ()))
    {
      preamble = WIFI_PREAMBLE_HT_GF;
    }

        {
          preamble = WIFI_PREAMBLE_VHT;
        }
      if (dataTxVector.GetMode ().GetModulationClass () == WIFI_MOD_CLASS_HT && m_phy->GetGreenfield () && m_stationManager->GetGreenfieldSupported (m_currentHdr.GetAddr1 ()))
        {
          preamble = WIFI_PREAMBLE_HT_GF;
        }

  Time duration = Seconds (0);

  WifiPreamble preamble;
  if (m_stationManager->GetShortPreambleEnabled ())
  if (m_phy->GetGreenfield () && m_stationManager->GetGreenfieldSupported (m_currentHdr.GetAddr1 ()))
    {
      preamble = WIFI_PREAMBLE_HT_GF;
    }
  //Otherwise, RTS should always use non-HT PPDU (HT PPDU cases not supported yet)
  else if (m_stationManager->GetShortPreambleEnabled ())
    {
      preamble = WIFI_PREAMBLE_SHORT;
    }

      preamble = WIFI_PREAMBLE_VHT;
    }
  //Since it is data then it can have format = GF
  else if (dataTxVector.GetMode ().GetModulationClass () == WIFI_MOD_CLASS_HT && m_phy->GetGreenfield () && m_stationManager->GetGreenfieldSupported (m_currentHdr.GetAddr1 ()))
    {
      preamble = WIFI_PREAMBLE_HT_GF;
    }

    {
      preamble = WIFI_PREAMBLE_VHT;
    }
  else if (m_currentTxVector.GetMode ().GetModulationClass () == WIFI_MOD_CLASS_HT && m_phy->GetGreenfield () && m_stationManager->GetGreenfieldSupported (m_currentHdr.GetAddr1 ()))
    {
      //In the future has to make sure that receiver has greenfield enabled
      preamble = WIFI_PREAMBLE_HT_GF;

    {
      preamble = WIFI_PREAMBLE_VHT;
    }
  else if (m_currentTxVector.GetMode ().GetModulationClass () == WIFI_MOD_CLASS_HT && m_phy->GetGreenfield () && m_stationManager->GetGreenfieldSupported (m_currentHdr.GetAddr1 ()))
    {
      //In the future has to make sure that receiver has greenfield enabled
      preamble = WIFI_PREAMBLE_HT_GF;

      preamble = WIFI_PREAMBLE_VHT;
      aPPDUMaxTime = MicroSeconds (5484);
    }
  else if (m_currentTxVector.GetMode ().GetModulationClass () == WIFI_MOD_CLASS_HT && m_phy->GetGreenfield () && m_stationManager->GetGreenfieldSupported (m_currentHdr.GetAddr1 ()))
    {
      preamble = WIFI_PREAMBLE_HT_GF;
    }

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