diff --git a/tools/chunks/catchunks/pipeline-interests-aimd.cpp b/tools/chunks/catchunks/pipeline-interests-aimd.cpp
index cbff235..2b7af06 100644
--- a/tools/chunks/catchunks/pipeline-interests-aimd.cpp
+++ b/tools/chunks/catchunks/pipeline-interests-aimd.cpp
@@ -1,7 +1,7 @@
 /**
- * Copyright (c) 2016,  Regents of the University of California,
- *                      Colorado State University,
- *                      University Pierre & Marie Curie, Sorbonne University.
+ * Copyright (c) 2016-2017, Regents of the University of California,
+ *                          Colorado State University,
+ *                          University Pierre & Marie Curie, Sorbonne University.
  *
  * This file is part of ndn-tools (Named Data Networking Essential Tools).
  * See AUTHORS.md for complete list of ndn-tools authors and contributors.
@@ -37,6 +37,7 @@
   , m_options(options)
   , m_rttEstimator(rttEstimator)
   , m_scheduler(m_face.getIoService())
+  , m_checkRtoEvent(m_scheduler)
   , m_nextSegmentNo(0)
   , m_receivedSize(0)
   , m_highData(0)
@@ -71,7 +72,7 @@
   m_nReceived++;
 
   // schedule the event to check retransmission timer
-  m_scheduler.scheduleEvent(m_options.rtoCheckInterval, [this] { checkRto(); });
+  m_checkRtoEvent = m_scheduler.scheduleEvent(m_options.rtoCheckInterval, [this] { checkRto(); });
 
   sendInterest(getNextSegmentNo(), false);
 }
@@ -80,11 +81,10 @@
 PipelineInterestsAimd::doCancel()
 {
   for (const auto& entry : m_segmentInfo) {
-    const SegmentInfo& segInfo = entry.second;
-    m_face.removePendingInterest(segInfo.interestId);
+    m_face.removePendingInterest(entry.second.interestId);
   }
+  m_checkRtoEvent.cancel();
   m_segmentInfo.clear();
-  m_scheduler.cancelAllEvents();
 }
 
 void
@@ -114,7 +114,7 @@
   }
 
   // schedule the next check after predefined interval
-  m_scheduler.scheduleEvent(m_options.rtoCheckInterval, [this] { checkRto(); });
+  m_checkRtoEvent = m_scheduler.scheduleEvent(m_options.rtoCheckInterval, [this] { checkRto(); });
 }
 
 void
diff --git a/tools/chunks/catchunks/pipeline-interests-aimd.hpp b/tools/chunks/catchunks/pipeline-interests-aimd.hpp
index 3d8e337..c67d5bc 100644
--- a/tools/chunks/catchunks/pipeline-interests-aimd.hpp
+++ b/tools/chunks/catchunks/pipeline-interests-aimd.hpp
@@ -1,7 +1,7 @@
 /**
- * Copyright (c) 2016,  Regents of the University of California,
- *                      Colorado State University,
- *                      University Pierre & Marie Curie, Sorbonne University.
+ * Copyright (c) 2016-2017, Regents of the University of California,
+ *                          Colorado State University,
+ *                          University Pierre & Marie Curie, Sorbonne University.
  *
  * This file is part of ndn-tools (Named Data Networking Essential Tools).
  * See AUTHORS.md for complete list of ndn-tools authors and contributors.
@@ -118,13 +118,13 @@
    * every segment until the last segment is successfully received or an error occurs.
    * The segment with segment number equal to m_excludedSegmentNo will not be fetched.
    */
-  virtual void
+  void
   doRun() final;
 
   /**
    * @brief stop all fetch operations
    */
-  virtual void
+  void
   doCancel() final;
 
   /**
@@ -186,20 +186,22 @@
   const Options m_options;
   RttEstimator& m_rttEstimator;
   Scheduler m_scheduler;
+  scheduler::ScopedEventId m_checkRtoEvent;
+
   uint64_t m_nextSegmentNo;
   size_t m_receivedSize;
 
   uint64_t m_highData; ///< the highest segment number of the Data packet the consumer has received so far
   uint64_t m_highInterest; ///< the highest segment number of the Interests the consumer has sent so far
-  uint64_t m_recPoint; ///< the value of m_highInterest when a packet loss event occurred
-                       ///< It remains fixed until the next packet loss event happens
+  uint64_t m_recPoint; ///< the value of m_highInterest when a packet loss event occurred,
+                       ///< it remains fixed until the next packet loss event happens
 
   uint64_t m_nInFlight; ///< # of segments in flight
   uint64_t m_nReceived; ///< # of segments received
   uint64_t m_nLossEvents; ///< # of loss events occurred
   uint64_t m_nRetransmitted; ///< # of segments retransmitted
 
-  time::steady_clock::TimePoint m_startTime; ///<  start time of pipelining
+  time::steady_clock::TimePoint m_startTime; ///< start time of pipelining
 
   double m_cwnd; ///< current congestion window size (in segments)
   double m_ssthresh; ///< current slow start threshold