diff -r e7504020e45b bindings/python/ns3_module_simulator.py
--- a/bindings/python/ns3_module_simulator.py	Tue Aug 05 19:46:05 2008 +0100
+++ b/bindings/python/ns3_module_simulator.py	Wed Aug 06 11:09:06 2008 +0100
@@ -367,6 +367,11 @@
                    'void', 
                    [], 
                    is_static=True, unblock_threads=True)
+    ## simulator.h: static void ns3::Simulator::RunOneEvent() [member function]
+    cls.add_method('RunOneEvent', 
+                   'void', 
+                   [], 
+                   is_static=True)
     ## simulator.h: static void ns3::Simulator::Stop() [member function]
     cls.add_method('Stop', 
                    'void', 
@@ -669,6 +674,11 @@
                    'void', 
                    [], 
                    is_pure_virtual=True, is_virtual=True)
+    ## simulator-impl.h: void ns3::SimulatorImpl::RunOneEvent() [member function]
+    cls.add_method('RunOneEvent', 
+                   'void', 
+                   [], 
+                   is_pure_virtual=True, is_virtual=True)
     ## simulator-impl.h: ns3::Time ns3::SimulatorImpl::Now() const [member function]
     cls.add_method('Now', 
                    'ns3::Time', 
@@ -762,6 +772,11 @@
                    is_const=True, is_virtual=True)
     ## default-simulator-impl.h: void ns3::DefaultSimulatorImpl::Run() [member function]
     cls.add_method('Run', 
+                   'void', 
+                   [], 
+                   is_virtual=True)
+    ## default-simulator-impl.h: void ns3::DefaultSimulatorImpl::RunOneEvent() [member function]
+    cls.add_method('RunOneEvent', 
                    'void', 
                    [], 
                    is_virtual=True)
diff -r e7504020e45b src/simulator/default-simulator-impl.cc
--- a/src/simulator/default-simulator-impl.cc	Tue Aug 05 19:46:05 2008 +0100
+++ b/src/simulator/default-simulator-impl.cc	Wed Aug 06 11:09:06 2008 +0100
@@ -154,6 +154,12 @@
   // If the simulator stopped naturally by lack of events, make a
   // consistency test to check that we didn't lose any events along the way.
   NS_ASSERT(!m_events->IsEmpty () || m_unscheduledEvents == 0);
+}
+
+void
+DefaultSimulatorImpl::RunOneEvent (void)
+{
+  ProcessOneEvent ();
 }
 
 void 
diff -r e7504020e45b src/simulator/default-simulator-impl.h
--- a/src/simulator/default-simulator-impl.h	Tue Aug 05 19:46:05 2008 +0100
+++ b/src/simulator/default-simulator-impl.h	Wed Aug 06 11:09:06 2008 +0100
@@ -55,6 +55,7 @@
   virtual void Cancel (const EventId &ev);
   virtual bool IsExpired (const EventId &ev) const;
   virtual void Run (void);
+  virtual void RunOneEvent (void);
   virtual Time Now (void) const;
   virtual Time GetDelayLeft (const EventId &id) const;
   virtual Time GetMaximumSimulationTime (void) const;
diff -r e7504020e45b src/simulator/simulator-impl.h
--- a/src/simulator/simulator-impl.h	Tue Aug 05 19:46:05 2008 +0100
+++ b/src/simulator/simulator-impl.h	Wed Aug 06 11:09:06 2008 +0100
@@ -49,6 +49,7 @@
   virtual void Cancel (const EventId &ev) = 0;
   virtual bool IsExpired (const EventId &ev) const = 0;
   virtual void Run (void) = 0;
+  virtual void RunOneEvent (void) = 0;
   virtual Time Now (void) const = 0;
   virtual Time GetDelayLeft (const EventId &id) const = 0;
   virtual Time GetMaximumSimulationTime (void) const = 0;
diff -r e7504020e45b src/simulator/simulator.cc
--- a/src/simulator/simulator.cc	Tue Aug 05 19:46:05 2008 +0100
+++ b/src/simulator/simulator.cc	Wed Aug 06 11:09:06 2008 +0100
@@ -143,6 +143,13 @@
 {
   NS_LOG_FUNCTION_NOARGS ();
   GetImpl ()->Run ();
+}
+
+void 
+Simulator::RunOneEvent (void)
+{
+  NS_LOG_FUNCTION_NOARGS ();
+  GetImpl ()->RunOneEvent ();
 }
 
 void 
diff -r e7504020e45b src/simulator/simulator.h
--- a/src/simulator/simulator.h	Tue Aug 05 19:46:05 2008 +0100
+++ b/src/simulator/simulator.h	Wed Aug 06 11:09:06 2008 +0100
@@ -115,6 +115,11 @@
    *     is greater than or equal to the stop time.
    */
   static void Run (void);
+
+  /**
+   * Process only the next simulation event, then return immediately.
+   */
+  static void RunOneEvent (void);
 
   /**
    * If an event invokes this method, it will be the last