--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/wifi/model/aarfcd-wifi-manager.h	Fri Mar 04 01:26:54 2011 +0000
@@ -0,0 +1,86 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2005,2006 INRIA
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as 
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Federico Maguolo <maguolof@dei.unipd.it>
+ */
+#ifndef AARFCD_WIFI_MANAGER_H
+#define AARFCD_WIFI_MANAGER_H
+
+#include "wifi-remote-station-manager.h"
+
+namespace ns3 {
+
+struct AarfcdWifiRemoteStation;
+
+/**
+ * \brief an implementation of the AARF-CD algorithm
+ *
+ * This algorithm was first described in "Efficient Collision Detection for Auto Rate Fallback Algorithm".
+ * The implementation available here was done by Federico Maguolo for a very early development
+ * version of ns-3. Federico died before merging this work in ns-3 itself so his code was ported
+ * to ns-3 later without his supervision.
+ */
+class AarfcdWifiManager : public WifiRemoteStationManager 
+{
+public:
+  static TypeId GetTypeId (void);
+  AarfcdWifiManager ();
+  virtual ~AarfcdWifiManager ();
+
+private:
+  // overriden from base class
+  virtual WifiRemoteStation *DoCreateStation (void) const;
+  virtual void DoReportRxOk (WifiRemoteStation *station, 
+                             double rxSnr, WifiMode txMode);
+  virtual void DoReportRtsFailed (WifiRemoteStation *station);
+  virtual void DoReportDataFailed (WifiRemoteStation *station);
+  virtual void DoReportRtsOk (WifiRemoteStation *station,
+                              double ctsSnr, WifiMode ctsMode, double rtsSnr);
+  virtual void DoReportDataOk (WifiRemoteStation *station,
+                               double ackSnr, WifiMode ackMode, double dataSnr);
+  virtual void DoReportFinalRtsFailed (WifiRemoteStation *station);
+  virtual void DoReportFinalDataFailed (WifiRemoteStation *station);
+  virtual WifiMode DoGetDataMode (WifiRemoteStation *station, uint32_t size);
+  virtual WifiMode DoGetRtsMode (WifiRemoteStation *station);
+  virtual bool DoNeedRts (WifiRemoteStation *station, 
+                          Ptr<const Packet> packet, bool normally);
+  virtual bool IsLowLatency (void) const;
+
+  void CheckRts (AarfcdWifiRemoteStation *station);
+  void IncreaseRtsWnd (AarfcdWifiRemoteStation *station);
+  void ResetRtsWnd (AarfcdWifiRemoteStation *station);
+  void TurnOffRts (AarfcdWifiRemoteStation *station);
+  void TurnOnRts (AarfcdWifiRemoteStation *station);
+
+  // aarf fields below
+  uint32_t m_minTimerThreshold;
+  uint32_t m_minSuccessThreshold;
+  double m_successK;
+  uint32_t m_maxSuccessThreshold;
+  double m_timerK;
+
+  // aarf-cd fields below
+  uint32_t m_minRtsWnd;
+  uint32_t m_maxRtsWnd;
+  bool m_rtsFailsAsDataFails;
+  bool m_turnOffRtsAfterRateDecrease;
+  bool m_turnOnRtsAfterRateIncrease;
+};
+
+} // namespace ns3
+
+#endif /* AARFCD_WIFI_MANAGER_H */