wifi: Reduce amount of Watt/dBm conversion

src/wifi/model/he/constant-obss-pd-algorithm.cc

@@ -72,7 +72,7 @@ ConstantObssPdAlgorithm::ConnectWifiNetDevice(const Ptr<WifiNetDevice> device)
 void
 ConstantObssPdAlgorithm::ReceiveHeSigA(HeSigAParameters params)
 {
-    NS_LOG_FUNCTION(this << +params.bssColor << WToDbm(params.rssiW));
+    NS_LOG_FUNCTION(this << +params.bssColor << params.rssiDbm);
 
     Ptr<StaWifiMac> mac = m_device->GetMac()->GetObject<StaWifiMac>();
     if (mac && !mac->IsAssociated())
@@ -100,12 +100,12 @@ ConstantObssPdAlgorithm::ReceiveHeSigA(HeSigAParameters params)
     bool isObss = (bssColor != params.bssColor);
     if (isObss)
     {
-        const double obssPdLevel = GetObssPdLevel();
-        if (WToDbm(params.rssiW) < obssPdLevel)
+        const auto obssPdLevel = GetObssPdLevel();
+        if (params.rssiDbm < obssPdLevel)
         {
-            NS_LOG_DEBUG("Frame is OBSS and RSSI " << WToDbm(params.rssiW)
-                                                   << " is below OBSS-PD level of " << obssPdLevel
-                                                   << "; reset PHY to IDLE");
+            NS_LOG_DEBUG("Frame is OBSS and RSSI "
+                         << params.rssiDbm << " dBm is below OBSS-PD level of " << obssPdLevel
+                         << " dBm; reset PHY to IDLE");
             ResetPhy(params);
         }
         else

src/wifi/model/he/he-phy.cc

@@ -612,9 +612,10 @@ HePhy::ProcessSigA(Ptr<Event> event, PhyFieldRxStatus status)
     NS_LOG_FUNCTION(this << *event << status);
     // Notify end of SIG-A (in all cases)
     const auto& txVector = event->GetPpdu()->GetTxVector();
-    HeSigAParameters params;
-    params.rssiW = GetRxPowerWForPpdu(event);
-    params.bssColor = txVector.GetBssColor();
+    HeSigAParameters params{
+        .rssiDbm = WToDbm(GetRxPowerWForPpdu(event)),
+        .bssColor = txVector.GetBssColor(),
+    };
     NotifyEndOfHeSigA(params); // if OBSS_PD CCA_RESET, set power restriction first and wait till
                                // field is processed before switching to IDLE
 

src/wifi/model/he/he-phy.h

@@ -53,7 +53,7 @@ class ObssPdAlgorithm;
  */
 struct HeSigAParameters
 {
-    double rssiW;     ///< RSSI in W
+    double rssiDbm;   ///< RSSI in dBm
     uint8_t bssColor; ///< BSS color
 };
 

src/wifi/model/he/obss-pd-algorithm.cc

@@ -116,7 +116,7 @@ ObssPdAlgorithm::ResetPhy(HeSigAParameters params)
         txPowerMaxMimo = m_txPowerRefMimo - (m_obssPdLevel - m_obssPdLevelMin);
         powerRestricted = true;
     }
-    m_resetEvent(bssColor, WToDbm(params.rssiW), powerRestricted, txPowerMaxSiso, txPowerMaxMimo);
+    m_resetEvent(bssColor, params.rssiDbm, powerRestricted, txPowerMaxSiso, txPowerMaxMimo);
     phy->ResetCca(powerRestricted, txPowerMaxSiso, txPowerMaxMimo);
 }
 

src/wifi/model/wifi-phy.cc

@@ -526,26 +526,26 @@ void
 WifiPhy::SetCcaEdThreshold(double threshold)
 {
     NS_LOG_FUNCTION(this << threshold);
-    m_ccaEdThresholdW = DbmToW(threshold);
+    m_ccaEdThresholdDbm = threshold;
 }
 
 double
 WifiPhy::GetCcaEdThreshold() const
 {
-    return WToDbm(m_ccaEdThresholdW);
+    return m_ccaEdThresholdDbm;
 }
 
 void
 WifiPhy::SetCcaSensitivityThreshold(double threshold)
 {
     NS_LOG_FUNCTION(this << threshold);
-    m_ccaSensitivityThresholdW = DbmToW(threshold);
+    m_ccaSensitivityThresholdDbm = threshold;
 }
 
 double
 WifiPhy::GetCcaSensitivityThreshold() const
 {
-    return WToDbm(m_ccaSensitivityThresholdW);
+    return m_ccaSensitivityThresholdDbm;
 }
 
 void

src/wifi/model/wifi-phy.h

@@ -1609,11 +1609,11 @@ class WifiPhy : public Object
     Time m_ackTxTime;      //!< estimated Ack TX time
     Time m_blockAckTxTime; //!< estimated BlockAck TX time
 
-    double m_rxSensitivityDbm; //!< Receive sensitivity threshold in dBm
-    double m_ccaEdThresholdW; //!< Clear channel assessment (CCA) energy detection (ED) threshold in
-                              //!< watts
-    double m_ccaSensitivityThresholdW; //!< Clear channel assessment (CCA) modulation and coding
-                                       //!< rate sensitivity threshold in watts
+    double m_rxSensitivityDbm;  //!< Receive sensitivity threshold in dBm
+    double m_ccaEdThresholdDbm; //!< Clear channel assessment (CCA) energy detection (ED) threshold
+                                //!< in dBm
+    double m_ccaSensitivityThresholdDbm; //!< Clear channel assessment (CCA) modulation and coding
+                                         //!< rate sensitivity threshold in dBm
 
     double m_txGainDb;          //!< Transmission gain (dB)
     double m_rxGainDb;          //!< Reception gain (dB)