diff --git a/model/fw/green-yellow-red.h b/model/fw/green-yellow-red.h
new file mode 100644
index 0000000..f324376
--- /dev/null
+++ b/model/fw/green-yellow-red.h
@@ -0,0 +1,62 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011 University of California, Los Angeles
+ *
+ * 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:  Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ *          Ilya Moiseenko <iliamo@cs.ucla.edu>
+ */
+#ifndef NDNSIM_GREEN_YELLOW_RED_H
+#define NDNSIM_GREEN_YELLOW_RED_H
+
+#include "nacks.h"
+
+namespace ns3 {
+namespace ndn {
+namespace fw {
+
+/**
+ * \ingroup ndn
+ */
+class GreenYellowRed :
+    public Nacks
+{
+public:
+  static TypeId GetTypeId (void);
+
+protected:
+  virtual void
+  WillSatisfyPendingInterest (const Ptr<Face> &incomingFace,
+                              Ptr<pit::Entry> pitEntry);
+
+  virtual bool
+  DoPropagateInterest (const Ptr<Face> &incomingFace,
+                       Ptr<InterestHeader> header,
+                       const Ptr<const Packet> &packet,
+                       Ptr<pit::Entry> pitEntry);
+  virtual void
+  DidReceiveValidNack (const Ptr<Face> &incomingFace,
+                       uint32_t nackCode,
+                       Ptr<pit::Entry> pitEntry);
+
+private:
+  typedef Nacks super;
+};
+
+} // namespace fw
+} // namespace ndn
+} // namespace ns3
+
+#endif // NDNSIM_GREEN_YELLOW_RED