diff --git a/src/lte/helper/lena-helper.cc b/src/lte/helper/lena-helper.cc
index a6187cca2..eab6bbda1 100644
--- a/src/lte/helper/lena-helper.cc
+++ b/src/lte/helper/lena-helper.cc
@@ -135,13 +135,10 @@ LenaHelper::SetUeDeviceAttribute (std::string name, const AttributeValue &value)
 Ptr<NetDevice>
 LenaHelper::InstallSingleEnbDevice (Ptr<Node> n)
 {
-  Ptr<LteEnbPhy> phy = CreateObject<LteEnbPhy> ();
-
   Ptr<LteSpectrumPhy> dlPhy = CreateObject<LteSpectrumPhy> ();
   Ptr<LteSpectrumPhy> ulPhy = CreateObject<LteSpectrumPhy> ();
-
-  phy->SetDownlinkSpectrumPhy (dlPhy);
-  phy->SetUplinkSpectrumPhy (ulPhy);
+  
+  Ptr<LteEnbPhy> phy = CreateObject<LteEnbPhy> (dlPhy, ulPhy);
 
   Ptr<SpectrumValue> noisePsd = LteSpectrumValueHelper::CreateUplinkNoisePowerSpectralDensity ();
   ulPhy->SetNoisePowerSpectralDensity (noisePsd);
@@ -193,13 +190,10 @@ LenaHelper::InstallSingleEnbDevice (Ptr<Node> n)
 Ptr<NetDevice>
 LenaHelper::InstallSingleUeDevice (Ptr<Node> n)
 {
-  Ptr<LteUePhy> phy = CreateObject<LteUePhy> ();
-
   Ptr<LteSpectrumPhy> dlPhy = CreateObject<LteSpectrumPhy> ();
   Ptr<LteSpectrumPhy> ulPhy = CreateObject<LteSpectrumPhy> ();
 
-  phy->SetDownlinkSpectrumPhy (dlPhy);
-  phy->SetUplinkSpectrumPhy (ulPhy);
+  Ptr<LteUePhy> phy = CreateObject<LteUePhy> (dlPhy, ulPhy);
 
   Ptr<SpectrumValue> noisePsd = LteSpectrumValueHelper::CreateDownlinkNoisePowerSpectralDensity ();
   dlPhy->SetNoisePowerSpectralDensity (noisePsd);
diff --git a/src/lte/model/lte-enb-phy.cc b/src/lte/model/lte-enb-phy.cc
index e84cadeb6..7b6f44972 100644
--- a/src/lte/model/lte-enb-phy.cc
+++ b/src/lte/model/lte-enb-phy.cc
@@ -102,14 +102,20 @@ NS_OBJECT_ENSURE_REGISTERED (LteEnbPhy);
 
 
 LteEnbPhy::LteEnbPhy ()
-  : m_nrFrames (0),
+{
+  NS_LOG_FUNCTION (this);
+  NS_FATAL_ERROR ("This constructor should not be called");
+}
+
+LteEnbPhy::LteEnbPhy (Ptr<LteSpectrumPhy> dlPhy, Ptr<LteSpectrumPhy> ulPhy)
+  : LtePhy (dlPhy, ulPhy),
+    m_nrFrames (0),
     m_nrSubFrames (0)
 {
   m_enbPhySapProvider = new EnbMemberLteEnbPhySapProvider (this);
   Simulator::ScheduleNow (&LteEnbPhy::StartFrame, this);
 }
 
-
 TypeId
 LteEnbPhy::GetTypeId (void)
 {
diff --git a/src/lte/model/lte-enb-phy.h b/src/lte/model/lte-enb-phy.h
index 4d2c1b7b8..ab127962a 100644
--- a/src/lte/model/lte-enb-phy.h
+++ b/src/lte/model/lte-enb-phy.h
@@ -42,13 +42,19 @@ class LteEnbPhy : public LtePhy
   friend class EnbMemberLteEnbPhySapProvider;
 
 public:
-  LteEnbPhy ();
 
-  /**
-   * \brief Create the eNB phy layer
-   * \param d the device where the phy layer is attached
+  /** 
+   * @warning the default constructor should not be used
    */
-  LteEnbPhy (Ptr<LteNetDevice> d);
+  LteEnbPhy ();
+  
+  /** 
+   * 
+   * \param dlPhy the downlink LteSpectrumPhy instance
+   * \param ulPhy the uplink LteSpectrumPhy instance
+   */
+  LteEnbPhy (Ptr<LteSpectrumPhy> dlPhy, Ptr<LteSpectrumPhy> ulPhy);
+  
   virtual ~LteEnbPhy ();
 
   static TypeId GetTypeId (void);
diff --git a/src/lte/model/lte-phy.cc b/src/lte/model/lte-phy.cc
index da15d78c2..d8311b2c2 100644
--- a/src/lte/model/lte-phy.cc
+++ b/src/lte/model/lte-phy.cc
@@ -35,12 +35,16 @@ namespace ns3 {
 
 NS_OBJECT_ENSURE_REGISTERED (LtePhy);
 
-
-
 LtePhy::LtePhy ()
+{
+  NS_LOG_FUNCTION (this);
+  NS_FATAL_ERROR ("This constructor should not be called");
+}
+
+LtePhy::LtePhy (Ptr<LteSpectrumPhy> dlPhy, Ptr<LteSpectrumPhy> ulPhy)
   : m_netDevice (0),
-    m_downlinkSpectrumPhy (0),
-    m_uplinkSpectrumPhy (0),
+    m_downlinkSpectrumPhy (dlPhy),
+    m_uplinkSpectrumPhy (ulPhy),
     m_txPower (43), // dBm
     m_tti (0.001),
     m_ulBandwidth (0),
@@ -107,21 +111,6 @@ LtePhy::GetDevice ()
 }
 
 
-void
-LtePhy::SetDownlinkSpectrumPhy (Ptr<LteSpectrumPhy> s)
-{
-  NS_LOG_FUNCTION (this << s);
-  m_downlinkSpectrumPhy = s;
-}
-
-
-void
-LtePhy::SetUplinkSpectrumPhy (Ptr<LteSpectrumPhy> s)
-{
-  NS_LOG_FUNCTION (this << s);
-  m_uplinkSpectrumPhy = s;
-}
-
 void
 LtePhy::SetDownlinkChannel (Ptr<SpectrumChannel> c)
 {
diff --git a/src/lte/model/lte-phy.h b/src/lte/model/lte-phy.h
index 1d0c5bdad..ffcee85c7 100644
--- a/src/lte/model/lte-phy.h
+++ b/src/lte/model/lte-phy.h
@@ -48,7 +48,18 @@ class LtePhy : public Object
 {
 
 public:
+  /** 
+   * @warning the default constructor should not be used
+   */
   LtePhy ();
+
+  /** 
+   * 
+   * \param dlPhy the downlink LteSpectrumPhy instance
+   * \param ulPhy the uplink LteSpectrumPhy instance
+   */
+  LtePhy (Ptr<LteSpectrumPhy> dlPhy, Ptr<LteSpectrumPhy> ulPhy);
+
   virtual ~LtePhy ();
 
   static TypeId GetTypeId (void);
@@ -70,18 +81,6 @@ public:
   */
   virtual void DoSendMacPdu (Ptr<Packet> p) = 0;
 
-  /**
-   * Set the LTE SpectrumPhy for the downlink
-   * \param s the LTE SpectrumPhy
-   */
-  void SetDownlinkSpectrumPhy (Ptr<LteSpectrumPhy> s);
-
-  /**
-   * Set the LTE SpectrumPhy for the uplink
-   * \param s the LTE SpectrumPhy
-   */
-  void SetUplinkSpectrumPhy (Ptr<LteSpectrumPhy> s);
-
   /**
    * Set the downlink channel
    * \param c the downlink channel
diff --git a/src/lte/model/lte-ue-phy.cc b/src/lte/model/lte-ue-phy.cc
index 01543b5aa..a9c73b24c 100644
--- a/src/lte/model/lte-ue-phy.cc
+++ b/src/lte/model/lte-ue-phy.cc
@@ -95,7 +95,14 @@ NS_OBJECT_ENSURE_REGISTERED (LteUePhy);
 
 
 LteUePhy::LteUePhy ()
-  : m_p10CqiPeriocity (MilliSeconds (160)),    
+{
+  NS_LOG_FUNCTION (this);
+  NS_FATAL_ERROR ("This constructor should not be called");
+}
+
+LteUePhy::LteUePhy (Ptr<LteSpectrumPhy> dlPhy, Ptr<LteSpectrumPhy> ulPhy)
+  : LtePhy (dlPhy, ulPhy),
+    m_p10CqiPeriocity (MilliSeconds (160)),    
     m_p10CqiLast (MilliSeconds (0)),
     m_a30CqiPeriocity (MilliSeconds (1)), // ideal behavior 
     m_a30CqiLast (MilliSeconds (0))
diff --git a/src/lte/model/lte-ue-phy.h b/src/lte/model/lte-ue-phy.h
index 65f9510df..73e825d9e 100644
--- a/src/lte/model/lte-ue-phy.h
+++ b/src/lte/model/lte-ue-phy.h
@@ -48,8 +48,21 @@ class LteUePhy : public LtePhy
 
 public:
 
+
+  /** 
+   * @warning the default constructor should not be used
+   */
   LteUePhy ();
+  
+  /** 
+   * 
+   * \param dlPhy the downlink LteSpectrumPhy instance
+   * \param ulPhy the uplink LteSpectrumPhy instance
+   */
+  LteUePhy (Ptr<LteSpectrumPhy> dlPhy, Ptr<LteSpectrumPhy> ulPhy);
+  
   virtual ~LteUePhy ();
+
   virtual void DoDispose ();
   static TypeId GetTypeId (void);
 
diff --git a/src/lte/test/lena-test-downlink-sinr.cc b/src/lte/test/lena-test-downlink-sinr.cc
index 696b4c1f0..b4f42b74b 100644
--- a/src/lte/test/lena-test-downlink-sinr.cc
+++ b/src/lte/test/lena-test-downlink-sinr.cc
@@ -85,11 +85,11 @@ LenaDownlinkSinrTestCase::DoRun (void)
   /**
    * Instantiate a single receiving LteSpectrumPhy
    */
-  Ptr<LteUePhy> uePhy = CreateObject<LteUePhy> ();
   Ptr<LteSpectrumPhy> dlPhy = CreateObject<LteSpectrumPhy> ();
+  Ptr<LteSpectrumPhy> ulPhy = CreateObject<LteSpectrumPhy> ();
+  Ptr<LteUePhy> uePhy = CreateObject<LteUePhy> (dlPhy, ulPhy);
 
   dlPhy->SetCellId (100);
-  uePhy->SetDownlinkSpectrumPhy (dlPhy);
 
   Ptr<LenaTestSinrChunkProcessor> p = Create<LenaTestSinrChunkProcessor> (uePhy->GetObject<LtePhy> ());
   dlPhy->AddSinrChunkProcessor (p);