--- a/src/lr-wpan/model/lr-wpan-phy.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lr-wpan/model/lr-wpan-phy.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -194,7 +194,7 @@
 }
 
 Ptr<NetDevice>
-LrWpanPhy::GetDevice (void)
+LrWpanPhy::GetDevice (void) const
 {
   NS_LOG_FUNCTION (this);
   return m_device;

--- a/src/lr-wpan/model/lr-wpan-phy.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lr-wpan/model/lr-wpan-phy.h	Thu Aug 13 12:10:01 2015 -0700
@@ -272,7 +272,7 @@
    */
   Ptr<SpectrumChannel> GetChannel (void);
   void SetDevice (Ptr<NetDevice> d);
-  Ptr<NetDevice> GetDevice (void);
+  Ptr<NetDevice> GetDevice (void) const;
 
   /**
    * Set the attached antenna.

--- a/src/lte/model/lte-phy.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lte/model/lte-phy.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -94,7 +94,7 @@
 
 
 Ptr<LteNetDevice>
-LtePhy::GetDevice ()
+LtePhy::GetDevice () const
 {
   NS_LOG_FUNCTION (this);
   return m_netDevice;

--- a/src/lte/model/lte-phy.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lte/model/lte-phy.h	Thu Aug 13 12:10:01 2015 -0700
@@ -78,7 +78,7 @@
    * \brief Get the device where the phy layer is attached
    * \return the pointer to the device
    */
-  Ptr<LteNetDevice> GetDevice ();
+  Ptr<LteNetDevice> GetDevice () const;
 
   /** 
    * 

--- a/src/lte/model/lte-spectrum-phy.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lte/model/lte-spectrum-phy.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -238,7 +238,7 @@
 
 
 Ptr<NetDevice>
-LteSpectrumPhy::GetDevice ()
+LteSpectrumPhy::GetDevice () const
 {
   NS_LOG_FUNCTION (this);
   return m_device;

--- a/src/lte/model/lte-spectrum-phy.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lte/model/lte-spectrum-phy.h	Thu Aug 13 12:10:01 2015 -0700
@@ -174,7 +174,7 @@
   void SetMobility (Ptr<MobilityModel> m);
   void SetDevice (Ptr<NetDevice> d);
   Ptr<MobilityModel> GetMobility ();
-  Ptr<NetDevice> GetDevice ();
+  Ptr<NetDevice> GetDevice () const;
   Ptr<const SpectrumModel> GetRxSpectrumModel () const;
   Ptr<AntennaModel> GetRxAntenna ();
   void StartRx (Ptr<SpectrumSignalParameters> params);

--- a/src/lte/model/rem-spectrum-phy.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lte/model/rem-spectrum-phy.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -103,7 +103,7 @@
 }
 
 Ptr<NetDevice>
-RemSpectrumPhy::GetDevice ()
+RemSpectrumPhy::GetDevice () const
 {
   return 0;
 }

--- a/src/lte/model/rem-spectrum-phy.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lte/model/rem-spectrum-phy.h	Thu Aug 13 12:10:01 2015 -0700
@@ -64,7 +64,7 @@
   void SetMobility (Ptr<MobilityModel> m);
   void SetDevice (Ptr<NetDevice> d);
   Ptr<MobilityModel> GetMobility ();
-  Ptr<NetDevice> GetDevice ();
+  Ptr<NetDevice> GetDevice () const;
   Ptr<const SpectrumModel> GetRxSpectrumModel () const;
   Ptr<AntennaModel> GetRxAntenna ();
   void StartRx (Ptr<SpectrumSignalParameters> params);

--- a/src/lte/test/lte-simple-spectrum-phy.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lte/test/lte-simple-spectrum-phy.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -73,7 +73,7 @@
 
 
 Ptr<NetDevice>
-LteSimpleSpectrumPhy::GetDevice ()
+LteSimpleSpectrumPhy::GetDevice () const
 {
   NS_LOG_FUNCTION (this);
   return m_device;

--- a/src/lte/test/lte-simple-spectrum-phy.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/lte/test/lte-simple-spectrum-phy.h	Thu Aug 13 12:10:01 2015 -0700
@@ -60,7 +60,7 @@
   void SetMobility (Ptr<MobilityModel> m);
   void SetDevice (Ptr<NetDevice> d);
   Ptr<MobilityModel> GetMobility ();
-  Ptr<NetDevice> GetDevice ();
+  Ptr<NetDevice> GetDevice () const;
   Ptr<const SpectrumModel> GetRxSpectrumModel () const;
   Ptr<AntennaModel> GetRxAntenna ();
   void StartRx (Ptr<SpectrumSignalParameters> params);

--- a/src/spectrum/model/half-duplex-ideal-phy.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/spectrum/model/half-duplex-ideal-phy.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -135,7 +135,7 @@
 
 
 Ptr<NetDevice>
-HalfDuplexIdealPhy::GetDevice ()
+HalfDuplexIdealPhy::GetDevice () const
 {
   NS_LOG_FUNCTION (this);
   return m_netDevice;

--- a/src/spectrum/model/half-duplex-ideal-phy.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/spectrum/model/half-duplex-ideal-phy.h	Thu Aug 13 12:10:01 2015 -0700
@@ -98,7 +98,7 @@
   void SetMobility (Ptr<MobilityModel> m);
   void SetDevice (Ptr<NetDevice> d);
   Ptr<MobilityModel> GetMobility ();
-  Ptr<NetDevice> GetDevice ();
+  Ptr<NetDevice> GetDevice () const;
   Ptr<const SpectrumModel> GetRxSpectrumModel () const;
   Ptr<AntennaModel> GetRxAntenna ();
   void StartRx (Ptr<SpectrumSignalParameters> params);

--- a/src/spectrum/model/spectrum-analyzer.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/spectrum/model/spectrum-analyzer.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -99,7 +99,7 @@
 
 
 Ptr<NetDevice>
-SpectrumAnalyzer::GetDevice ()
+SpectrumAnalyzer::GetDevice () const
 {
   return m_netDevice;
 }

--- a/src/spectrum/model/spectrum-analyzer.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/spectrum/model/spectrum-analyzer.h	Thu Aug 13 12:10:01 2015 -0700
@@ -59,7 +59,7 @@
   void SetMobility (Ptr<MobilityModel> m);
   void SetDevice (Ptr<NetDevice> d);
   Ptr<MobilityModel> GetMobility ();
-  Ptr<NetDevice> GetDevice ();
+  Ptr<NetDevice> GetDevice () const;
   Ptr<const SpectrumModel> GetRxSpectrumModel () const;
   Ptr<AntennaModel> GetRxAntenna ();
   void StartRx (Ptr<SpectrumSignalParameters> params);

--- a/src/spectrum/model/spectrum-phy.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/spectrum/model/spectrum-phy.h	Thu Aug 13 12:10:01 2015 -0700
@@ -63,7 +63,7 @@
    *
    * @return a Ptr to the associated NetDevice instance
    */
-  virtual Ptr<NetDevice> GetDevice () = 0;
+  virtual Ptr<NetDevice> GetDevice () const = 0;
 
   /**
    * Set the mobility model associated with this device.

--- a/src/spectrum/model/tv-spectrum-transmitter.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/spectrum/model/tv-spectrum-transmitter.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -151,7 +151,7 @@
 }
 
 Ptr<NetDevice>
-TvSpectrumTransmitter::GetDevice ()
+TvSpectrumTransmitter::GetDevice () const
 {
   NS_LOG_FUNCTION (this);
   return m_netDevice;

--- a/src/spectrum/model/tv-spectrum-transmitter.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/spectrum/model/tv-spectrum-transmitter.h	Thu Aug 13 12:10:01 2015 -0700
@@ -71,7 +71,7 @@
   void SetMobility (Ptr<MobilityModel> m);
   void SetDevice (Ptr<NetDevice> d);
   Ptr<MobilityModel> GetMobility ();
-  Ptr<NetDevice> GetDevice ();
+  Ptr<NetDevice> GetDevice () const;
   // device does not use Rx but these pure virtual methods must be implemented
   Ptr<const SpectrumModel> GetRxSpectrumModel () const;
   Ptr<AntennaModel> GetRxAntenna ();

--- a/src/spectrum/model/waveform-generator.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/spectrum/model/waveform-generator.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -98,7 +98,7 @@
 
 
 Ptr<NetDevice>
-WaveformGenerator::GetDevice ()
+WaveformGenerator::GetDevice () const
 {
   return m_netDevice;
 }

--- a/src/spectrum/model/waveform-generator.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/spectrum/model/waveform-generator.h	Thu Aug 13 12:10:01 2015 -0700
@@ -64,7 +64,7 @@
   void SetMobility (Ptr<MobilityModel> m);
   void SetDevice (Ptr<NetDevice> d);
   Ptr<MobilityModel> GetMobility ();
-  Ptr<NetDevice> GetDevice ();
+  Ptr<NetDevice> GetDevice () const;
   Ptr<const SpectrumModel> GetRxSpectrumModel () const;
   Ptr<AntennaModel> GetRxAntenna ();
   void StartRx (Ptr<SpectrumSignalParameters> params);

--- a/src/uan/model/uan-phy-dual.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/uan/model/uan-phy-dual.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -498,7 +498,7 @@
   return m_phy1->GetChannel ();
 }
 Ptr<UanNetDevice>
-UanPhyDual::GetDevice (void)
+UanPhyDual::GetDevice (void) const
 {
   return m_phy1->GetDevice ();
 }

--- a/src/uan/model/uan-phy-dual.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/uan/model/uan-phy-dual.h	Thu Aug 13 12:10:01 2015 -0700
@@ -126,7 +126,7 @@
   virtual bool IsStateTx (void);
   virtual bool IsStateCcaBusy (void);
   virtual Ptr<UanChannel> GetChannel (void) const;
-  virtual Ptr<UanNetDevice> GetDevice (void);
+  virtual Ptr<UanNetDevice> GetDevice (void) const;
   virtual void SetChannel (Ptr<UanChannel> channel);
   virtual void SetDevice (Ptr<UanNetDevice> device);
   virtual void SetMac (Ptr<UanMac> mac);

--- a/src/uan/model/uan-phy-gen.cc	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/uan/model/uan-phy-gen.cc	Thu Aug 13 12:10:01 2015 -0700
@@ -809,7 +809,7 @@
 }
 
 Ptr<UanNetDevice>
-UanPhyGen::GetDevice (void)
+UanPhyGen::GetDevice (void) const
 {
   return m_device;
 }

--- a/src/uan/model/uan-phy-gen.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/uan/model/uan-phy-gen.h	Thu Aug 13 12:10:01 2015 -0700
@@ -260,7 +260,7 @@
   virtual double GetRxThresholdDb (void);
   virtual double GetCcaThresholdDb (void);
   virtual Ptr<UanChannel> GetChannel (void) const;
-  virtual Ptr<UanNetDevice> GetDevice (void);
+  virtual Ptr<UanNetDevice> GetDevice (void) const;
   virtual Ptr<UanTransducer> GetTransducer (void);
   virtual void SetChannel (Ptr<UanChannel> channel);
   virtual void SetDevice (Ptr<UanNetDevice> device);

--- a/src/uan/model/uan-phy.h	Wed Jul 29 12:44:41 2015 -0700
+++ b/src/uan/model/uan-phy.h	Thu Aug 13 12:10:01 2015 -0700
@@ -345,7 +345,7 @@
    *
    * \return The net device.
    */
-  virtual Ptr<UanNetDevice> GetDevice (void) = 0;
+  virtual Ptr<UanNetDevice> GetDevice (void) const = 0;
 
   /**
    * Attach to a channel.