diff --git a/apps/ndn-consumer-window.cc b/apps/ndn-consumer-window.cc
new file mode 100644
index 0000000..242456a
--- /dev/null
+++ b/apps/ndn-consumer-window.cc
@@ -0,0 +1,180 @@
+/* -*-  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>
+ */
+
+#include "ndn-consumer-window.h"
+#include "ns3/ptr.h"
+#include "ns3/log.h"
+#include "ns3/simulator.h"
+#include "ns3/packet.h"
+#include "ns3/callback.h"
+#include "ns3/string.h"
+#include "ns3/uinteger.h"
+#include "ns3/double.h"
+
+NS_LOG_COMPONENT_DEFINE ("NdnConsumerWindow");
+
+namespace ns3
+{    
+    
+NS_OBJECT_ENSURE_REGISTERED (NdnConsumerWindow);
+    
+TypeId
+NdnConsumerWindow::GetTypeId (void)
+{
+  static TypeId tid = TypeId ("ns3::NdnConsumerWindow")
+    .SetGroupName ("Ndn")
+    .SetParent<NdnConsumer> ()
+    .AddConstructor<NdnConsumerWindow> ()
+
+    .AddAttribute ("Window", "Initial size of the window",
+                   StringValue ("1"),
+                   MakeUintegerAccessor (&NdnConsumerWindow::GetWindow, &NdnConsumerWindow::SetWindow),
+                   MakeUintegerChecker<uint32_t> ())
+
+    .AddAttribute ("PayloadSize", "Average size of content object size (to calculate interest generation rate)",
+                   UintegerValue (1040),
+                   MakeUintegerAccessor (&NdnConsumerWindow::GetPayloadSize, &NdnConsumerWindow::SetPayloadSize),
+                   MakeUintegerChecker<uint32_t>())
+    .AddAttribute ("Size", "Amount of data in megabytes to request (relies on PayloadSize parameter)",
+                   DoubleValue (-1), // don't impose limit by default
+                   MakeDoubleAccessor (&NdnConsumerWindow::GetMaxSize, &NdnConsumerWindow::SetMaxSize),
+                   MakeDoubleChecker<double> ())
+
+    .AddTraceSource ("WindowTrace",
+                     "Window that controls how many outstanding interests are allowed",
+                     MakeTraceSourceAccessor (&NdnConsumerWindow::m_window))
+    .AddTraceSource ("InFlight",
+                     "Current number of outstanding interests",
+                     MakeTraceSourceAccessor (&NdnConsumerWindow::m_window))
+    ;
+
+  return tid;
+}
+
+NdnConsumerWindow::NdnConsumerWindow ()
+  : m_payloadSize (1040)
+  , m_inFlight (0)
+{
+}
+
+void
+NdnConsumerWindow::SetWindow (uint32_t window)
+{
+  m_window = window;
+}
+
+uint32_t
+NdnConsumerWindow::GetWindow () const
+{
+  return m_window;
+}
+
+uint32_t
+NdnConsumerWindow::GetPayloadSize () const
+{
+  return m_payloadSize;
+}
+
+void
+NdnConsumerWindow::SetPayloadSize (uint32_t payload)
+{
+  m_payloadSize = payload;
+}
+
+double
+NdnConsumerWindow::GetMaxSize () const
+{
+  if (m_seqMax == 0)
+    return -1.0;
+
+  return m_maxSize;
+}
+
+void
+NdnConsumerWindow::SetMaxSize (double size)
+{
+  m_maxSize = size;
+  if (m_maxSize < 0)
+    {
+      m_seqMax = 0;
+      return;
+    }
+
+  m_seqMax = floor(1.0 + m_maxSize * 1024.0 * 1024.0 / m_payloadSize);
+  NS_LOG_DEBUG ("MaxSeqNo: " << m_seqMax);
+  // std::cout << "MaxSeqNo: " << m_seqMax << "\n";
+}
+
+
+void
+NdnConsumerWindow::ScheduleNextPacket ()
+{
+  if (m_window == static_cast<uint32_t> (0) || m_inFlight >= m_window)
+    {
+      if (!m_sendEvent.IsRunning ())
+        m_sendEvent = Simulator::Schedule (Seconds (m_rtt->RetransmitTimeout ().ToDouble (Time::S) * 0.1), &NdnConsumer::SendPacket, this);
+      return;
+    }
+  
+  // std::cout << "Window: " << m_window << ", InFlight: " << m_inFlight << "\n";
+  if (!m_sendEvent.IsRunning ())
+    {
+      m_inFlight++;
+      m_sendEvent = Simulator::ScheduleNow (&NdnConsumer::SendPacket, this);
+    }
+}
+
+///////////////////////////////////////////////////
+//          Process incoming packets             //
+///////////////////////////////////////////////////
+
+void
+NdnConsumerWindow::OnContentObject (const Ptr<const NdnContentObjectHeader> &contentObject,
+                                     Ptr<Packet> payload)
+{
+  NdnConsumer::OnContentObject (contentObject, payload);
+
+  m_window = m_window + 1;
+
+  if (m_inFlight > static_cast<uint32_t> (0)) m_inFlight--;
+  ScheduleNextPacket ();
+}
+
+void
+NdnConsumerWindow::OnNack (const Ptr<const NdnInterestHeader> &interest, Ptr<Packet> payload)
+{
+  NdnConsumer::OnNack (interest, payload);
+  if (m_inFlight > static_cast<uint32_t> (0)) m_inFlight--;
+
+  if (m_window > static_cast<uint32_t> (0))
+    {
+      // m_window = 0.5 * m_window;//m_window - 1;
+      m_window = m_window - 1;
+    }
+}
+
+void
+NdnConsumerWindow::OnTimeout (uint32_t sequenceNumber)
+{
+  if (m_inFlight > static_cast<uint32_t> (0)) m_inFlight--;
+  NdnConsumer::OnTimeout (sequenceNumber);
+}
+
+} // namespace ns3