diff -r 3c76393dba66 src/wifi/model/dca-txop.cc
--- a/src/wifi/model/dca-txop.cc	Fri Apr 01 17:45:26 2011 +0100
+++ b/src/wifi/model/dca-txop.cc	Sun Apr 03 19:12:45 2011 +0200
@@ -24,6 +24,7 @@
 #include "ns3/simulator.h"
 #include "ns3/node.h"
 #include "ns3/uinteger.h"
+#include "ns3/pointer.h"
 
 #include "dca-txop.h"
 #include "dcf-manager.h"
@@ -102,6 +103,10 @@
   static TypeId tid = TypeId ("ns3::DcaTxop")
     .SetParent (ns3::Dcf::GetTypeId ())
     .AddConstructor<DcaTxop> ()
+    .AddAttribute ("Queue", "The WifiMacQueue object",
+                   PointerValue (),
+                   MakePointerAccessor (&DcaTxop::GetQueue),
+                   MakePointerChecker<WifiMacQueue> ())
     ;
   return tid;
 }
@@ -171,18 +176,13 @@
   m_txFailedCallback = callback;
 }
 
-void 
-DcaTxop::SetMaxQueueSize (uint32_t size)
+Ptr<WifiMacQueue >
+DcaTxop::GetQueue () const
 {
-  NS_LOG_FUNCTION (this << size);
-  m_queue->SetMaxSize (size);
+  NS_LOG_FUNCTION (this);
+  return m_queue;
 }
-void 
-DcaTxop::SetMaxQueueDelay (Time delay)
-{
-  NS_LOG_FUNCTION (this << delay);
-  m_queue->SetMaxDelay (delay);
-}
+
 void 
 DcaTxop::SetMinCw (uint32_t minCw)
 {
diff -r 3c76393dba66 src/wifi/model/dca-txop.h
--- a/src/wifi/model/dca-txop.h	Fri Apr 01 17:45:26 2011 +0100
+++ b/src/wifi/model/dca-txop.h	Sun Apr 03 19:12:45 2011 +0200
@@ -89,8 +89,7 @@
    */
   void SetTxFailedCallback (TxFailed callback);
 
-  void SetMaxQueueSize (uint32_t size);
-  void SetMaxQueueDelay (Time delay);
+  Ptr<WifiMacQueue > GetQueue () const; 
   virtual void SetMinCw (uint32_t minCw);
   virtual void SetMaxCw (uint32_t maxCw);
   virtual void SetAifsn (uint32_t aifsn);
diff -r 3c76393dba66 src/wifi/model/edca-txop-n.cc
--- a/src/wifi/model/edca-txop-n.cc	Fri Apr 01 17:45:26 2011 +0100
+++ b/src/wifi/model/edca-txop-n.cc	Sun Apr 03 19:12:45 2011 +0200
@@ -21,6 +21,7 @@
  */
 #include "ns3/log.h"
 #include "ns3/assert.h"
+#include "ns3/pointer.h"
 
 #include "edca-txop-n.h"
 #include "mac-low.h"
@@ -138,6 +139,10 @@
                    UintegerValue(0),
                    MakeUintegerAccessor (&EdcaTxopN::SetBlockAckInactivityTimeout),
                    MakeUintegerChecker<uint16_t> ())
+    .AddAttribute ("Queue", "The WifiMacQueue object",
+                   PointerValue (),
+                   MakePointerAccessor (&EdcaTxopN::GetQueue),
+                   MakePointerChecker<WifiMacQueue> ())
     ;
   return tid;
 }
@@ -230,18 +235,11 @@
   return m_typeOfStation;
 }
 
-void 
-EdcaTxopN::SetMaxQueueSize (uint32_t size)
+Ptr<WifiMacQueue >
+EdcaTxopN::GetQueue () const
 {
-  NS_LOG_FUNCTION (this << size);
-  m_queue->SetMaxSize (size);
-}
-
-void
-EdcaTxopN::SetMaxQueueDelay (Time delay)
-{
-  NS_LOG_FUNCTION (this << delay);
-  m_queue->SetMaxDelay (delay);
+  NS_LOG_FUNCTION (this);
+  return m_queue;
 }
 
 void 
diff -r 3c76393dba66 src/wifi/model/edca-txop-n.h
--- a/src/wifi/model/edca-txop-n.h	Fri Apr 01 17:45:26 2011 +0100
+++ b/src/wifi/model/edca-txop-n.h	Sun Apr 03 19:12:45 2011 +0200
@@ -93,8 +93,7 @@
   void SetTypeOfStation (enum TypeOfStation type);
   enum TypeOfStation GetTypeOfStation (void) const;
 
-  void SetMaxQueueSize (uint32_t size);
-  void SetMaxQueueDelay (Time delay);
+  Ptr<WifiMacQueue > GetQueue () const; 
   virtual void SetMinCw (uint32_t minCw);
   virtual void SetMaxCw (uint32_t maxCw);
   virtual void SetAifsn (uint32_t aifsn);