diff --git a/helper/tracers/ccnx-seqs-app-tracer.cc b/helper/tracers/ccnx-seqs-app-tracer.cc
new file mode 100644
index 0000000..5ea636e
--- /dev/null
+++ b/helper/tracers/ccnx-seqs-app-tracer.cc
@@ -0,0 +1,116 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011 UCLA
+ *
+ * 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>
+ */
+
+#include "ccnx-seqs-app-tracer.h"
+#include "ns3/node.h"
+#include "ns3/packet.h"
+#include "ns3/config.h"
+#include "ns3/callback.h"
+#include "ns3/simulator.h"
+
+#include "ns3/ccnx-app.h"
+#include "ns3/ccnx-face.h"
+#include "ns3/ccnx-interest-header.h"
+#include "ns3/ccnx-content-object-header.h"
+
+namespace ns3 {
+    
+CcnxSeqsAppTracer::CcnxSeqsAppTracer (std::ostream &os, const std::string &app, Ptr<Node> node, const std::string &appId)
+  : CcnxAppTracer (app, node, appId)
+  , m_os (os)
+{
+}
+
+CcnxSeqsAppTracer::CcnxSeqsAppTracer (std::ostream &os, const std::string &app, const std::string &node, const std::string &appId)
+  : CcnxAppTracer (app, node, appId)
+  , m_os (os)
+{
+}
+
+void
+CcnxSeqsAppTracer::Reset ()
+{
+}
+
+void
+CcnxSeqsAppTracer::PrintHeader (std::ostream &os) const
+{
+  os << "Time\t"
+     << "Node\t"
+     << "AppName\t"
+     << "AppId\t"
+     << "Type\t"
+     << "SeqNo";
+}
+
+void
+CcnxSeqsAppTracer::Print (std::ostream &os) const
+{
+}
+
+#define PRINTER(type)                                              \
+ m_os                                                              \
+ << Simulator::Now ().ToDouble (Time::S) << "\t"                   \
+ << m_node << "\t"                                                 \
+ << m_app << "\t"                                                  \
+ << m_appId << "\t"                                                \
+ << type << "\t"                                                   \
+ << header->GetName ().GetLastComponent () << std::endl;
+
+void
+CcnxSeqsAppTracer::OutInterests (std::string context,
+                                 Ptr<const CcnxInterestHeader> header, Ptr<CcnxApp>, Ptr<CcnxFace>)
+{
+  PRINTER ("OutInterest");
+}
+
+void
+CcnxSeqsAppTracer::OutData (std::string context,
+                            Ptr<const CcnxContentObjectHeader> header, Ptr<const Packet>,
+                            Ptr<CcnxApp>, Ptr<CcnxFace>)
+{
+  PRINTER ("OutData");
+}
+
+void
+CcnxSeqsAppTracer::InInterests (std::string context,
+                                Ptr<const CcnxInterestHeader> header,
+                                Ptr<CcnxApp>, Ptr<CcnxFace>)
+{
+  PRINTER ("InInterest");
+}
+
+void
+CcnxSeqsAppTracer::InNacks (std::string context,
+                            Ptr<const CcnxInterestHeader> header,
+                            Ptr<CcnxApp>, Ptr<CcnxFace>)
+{
+  PRINTER ("InNacks");
+}
+  
+void
+CcnxSeqsAppTracer::InData (std::string context,
+                           Ptr<const CcnxContentObjectHeader> header, Ptr<const Packet>,
+                           Ptr<CcnxApp>, Ptr<CcnxFace>)
+{
+  PRINTER ("InData");
+}
+
+} // namespace ns3
diff --git a/helper/tracers/ccnx-seqs-app-tracer.h b/helper/tracers/ccnx-seqs-app-tracer.h
new file mode 100644
index 0000000..b0fd618
--- /dev/null
+++ b/helper/tracers/ccnx-seqs-app-tracer.h
@@ -0,0 +1,71 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011 UCLA
+ *
+ * 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>
+ */
+
+#ifndef CCNX_SEQS_APP_TRACER_H
+#define CCNX_SEQS_APP_TRACER_H
+
+#include "ns3/ccnx-app-tracer.h"
+
+namespace ns3 {
+
+class CcnxSeqsAppTracer : public CcnxAppTracer
+{
+public:
+  CcnxSeqsAppTracer (std::ostream &os, const std::string &app, Ptr<Node> node, const std::string &appId = "*");
+  CcnxSeqsAppTracer (std::ostream &os, const std::string &app, const std::string &node, const std::string &appId = "*");
+  virtual ~CcnxSeqsAppTracer () { };
+
+  virtual void
+  PrintHeader (std::ostream &os) const;
+
+  virtual void
+  Print (std::ostream &os) const;
+
+  virtual void
+  OutInterests (std::string context,
+                Ptr<const CcnxInterestHeader>, Ptr<CcnxApp>, Ptr<CcnxFace>);
+
+  virtual void
+  InInterests  (std::string context,
+                Ptr<const CcnxInterestHeader>, Ptr<CcnxApp>, Ptr<CcnxFace>);
+
+  virtual void
+  InNacks (std::string context,
+           Ptr<const CcnxInterestHeader>, Ptr<CcnxApp>, Ptr<CcnxFace>);
+
+  virtual void
+  OutData (std::string context,
+           Ptr<const CcnxContentObjectHeader>, Ptr<const Packet>, Ptr<CcnxApp>, Ptr<CcnxFace>);
+  
+  virtual void
+  InData  (std::string context,
+           Ptr<const CcnxContentObjectHeader>, Ptr<const Packet>, Ptr<CcnxApp>, Ptr<CcnxFace>);
+
+protected:
+  void
+  Reset ();
+
+protected:
+  std::ostream& m_os;
+};
+
+} // namespace ns3
+
+#endif // CCNX_AGGREGATE_APP_TRACER_H