diff --git a/tools/chunks/catchunks/pipeline-interests-fixed.hpp b/tools/chunks/catchunks/pipeline-interests-fixed.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2016-2019,  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.
+ *
+ * ndn-tools is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-tools 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
+ * ndn-tools, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ *
+ * @author Wentao Shang
+ * @author Steve DiBenedetto
+ * @author Andrea Tosatto
+ * @author Davide Pesavento
+ * @author Chavoosh Ghasemi
+ */
+
+#ifndef NDN_TOOLS_CHUNKS_CATCHUNKS_PIPELINE_INTERESTS_FIXED_HPP
+#define NDN_TOOLS_CHUNKS_CATCHUNKS_PIPELINE_INTERESTS_FIXED_HPP
+
+#include "options.hpp"
+#include "pipeline-interests.hpp"
+
+namespace ndn {
+namespace chunks {
+
+class DataFetcher;
+
+class PipelineInterestsFixedOptions : public Options
+{
+public:
+  explicit
+  PipelineInterestsFixedOptions(const Options& options = Options())
+    : Options(options)
+    , maxPipelineSize(1)
+  {
+  }
+
+public:
+  size_t maxPipelineSize;
+};
+
+/**
+ * @brief Service for retrieving Data via an Interest pipeline
+ *
+ * Retrieves all segments of Data under a given prefix by maintaining a fixed-size window of
+ * N Interests in flight. A user-specified callback function is used to notify the arrival of
+ * each segment of Data.
+ *
+ * No guarantees are made as to the order in which segments are fetched or callbacks are invoked,
+ * i.e. out-of-order delivery is possible.
+ */
+class PipelineInterestsFixed : public PipelineInterests
+{
+public:
+  typedef PipelineInterestsFixedOptions Options;
+
+public:
+  /**
+   * @brief create a PipelineInterestsFixed service
+   *
+   * Configures the pipelining service without specifying the retrieval namespace. After this
+   * configuration the method run must be called to start the Pipeline.
+   */
+  explicit
+  PipelineInterestsFixed(Face& face, const Options& options = Options());
+
+  ~PipelineInterestsFixed() final;
+
+private:
+  /**
+   * @brief fetch all the segments between 0 and m_lastSegmentNo
+   *
+   * Starts a fixed-window pipeline with size equal to m_options.maxPipelineSize. The pipeline
+   * will fetch every segment until the last segment is successfully received or an error occurs.
+   */
+  void
+  doRun() final;
+
+  void
+  doCancel() final;
+
+  /**
+   * @brief fetch the next segment that has not been requested yet
+   *
+   * @return false if there is an error or all the segments have been fetched, true otherwise
+   */
+  bool
+  fetchNextSegment(size_t pipeNo);
+
+  void
+  handleData(const Interest& interest, const Data& data, size_t pipeNo);
+
+  void
+  handleFail(const std::string& reason, size_t pipeNo);
+
+private:
+  const Options m_options;
+  std::vector<std::pair<shared_ptr<DataFetcher>, uint64_t>> m_segmentFetchers;
+
+  /**
+   * true if one or more segment fetchers encountered an error; if m_hasFinalBlockId
+   * is false, this is usually not a fatal error for the pipeline
+   */
+  bool m_hasFailure;
+};
+
+} // namespace chunks
+} // namespace ndn
+
+#endif // NDN_TOOLS_CHUNKS_CATCHUNKS_PIPELINE_INTERESTS_FIXED_HPP