diff --git a/src/repetitive-interval.hpp b/src/repetitive-interval.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2015,  Regents of the University of California
+ *
+ * This file is part of ndn-group-encrypt (Group-based Encryption Protocol for NDN).
+ * See AUTHORS.md for complete list of ndn-group-encrypt authors and contributors.
+ *
+ * ndn-group-encrypt 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-group-encrypt 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-group-encrypt, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @author Zhiyi Zhang <dreamerbarrychang@gmail.com>
+ */
+
+#ifndef NDN_GEP_REPETITIVE_INTERVAL_HPP
+#define NDN_GEP_REPETITIVE_INTERVAL_HPP
+
+#include "common.hpp"
+#include "interval.hpp"
+
+namespace ndn {
+namespace gep {
+
+///@brief An advanced interval which can have a repeat pattern and repeat unit
+class RepetitiveInterval
+{
+public:
+  enum class RepeatUnit{
+    NONE = 0,
+    DAY = 1,
+    MONTH = 2,
+    YEAR = 3
+  };
+
+public:
+  RepetitiveInterval();
+
+  explicit
+  RepetitiveInterval(const Block& block);
+
+  /**
+   * @brief Construction to create an object
+   * @pre @p startDate <= @p endDate
+   * @pre @p intervalStartHour and @p intervalEndHour can be [0, 24]
+   * @pre @p intervalStartHour < @p intervalEndHour
+   * @pre when @p unit = NONE, then @p startDate == @p endDate
+   */
+  RepetitiveInterval(const TimeStamp& startDate,
+                     const TimeStamp& endDate,
+                     size_t intervalStartHour,
+                     size_t intervalEndHour,
+                     size_t nRepeats = 0,
+                     RepeatUnit unit = RepeatUnit::NONE);
+
+  template<encoding::Tag TAG>
+  size_t
+  wireEncode(EncodingImpl<TAG>& encoder) const;
+
+  const Block&
+  wireEncode() const;
+
+  void
+  wireDecode(const Block& wire);
+
+  /**
+   * @brief Get get an interval that @p tp falls in
+   *
+   * @parameter tp A timestamp
+   *
+   * @return bool If the repetitive interval covers the @p tp, return true, otherwise false
+   * @return Interval Return the interval which @tp falls in
+   */
+  std::tuple<bool, Interval>
+  getInterval(const TimeStamp& tp) const;
+
+  /**
+   * @brief To store in std::set, class have to implement operator <
+   *
+   * @parameter interval Interval which will be compared with
+   */
+  bool
+  operator<(const RepetitiveInterval& interval) const;
+
+  const TimeStamp&
+  getStartDate() const
+  {
+    return m_startDate;
+  }
+
+  const TimeStamp&
+  getEndDate() const
+  {
+    return m_endDate;
+  }
+
+  size_t
+  getIntervalStartHour() const
+  {
+    return m_intervalStartHour;
+  }
+
+  size_t
+  getIntervalEndHour() const
+  {
+    return m_intervalEndHour;
+  }
+
+  size_t
+  getNRepeats() const
+  {
+    return m_nRepeats;
+  }
+
+  RepeatUnit
+  getRepeatUnit() const
+  {
+    return m_unit;
+  }
+
+private:
+  ///@brief Check if there is any interval in the date of timestamp
+  bool
+  hasIntervalOnDate(const TimeStamp& tp) const;
+
+  TimeStamp m_startDate;
+  TimeStamp m_endDate;
+  size_t m_intervalStartHour;
+  size_t m_intervalEndHour;
+  size_t m_nRepeats;
+  RepeatUnit m_unit;
+
+  mutable Block m_wire;
+};
+
+} // namespace gep
+} // namespace ndn
+
+#endif // NDN_GEP_REPETITIVE_INTERVAL_HPP