diff --git a/src/schedule.hpp b/src/schedule.hpp
new file mode 100644
index 0000000..80ecb32
--- /dev/null
+++ b/src/schedule.hpp
@@ -0,0 +1,83 @@
+/* -*- 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_SECHEDULE_HPP
+#define NDN_GEP_SECHEDULE_HPP
+
+#include "common.hpp"
+#include "repetitive-interval.hpp"
+
+namespace ndn {
+namespace gep {
+
+/**
+ * @brief Schedule is used to manage the time, which contains two sets of RepetitiveIntervals
+ *
+ * whiteIntervalList is used to define the time allowing member's access to data
+ * blackIntervalList is used to define the time not allowing member's access to data
+ */
+class Schedule
+{
+public:
+  Schedule();
+
+  explicit
+  Schedule(const Block& block);
+
+public:
+  template<encoding::Tag TAG>
+  size_t
+  wireEncode(EncodingImpl<TAG>& encoder) const;
+
+  const Block&
+  wireEncode() const;
+
+  void
+  wireDecode(const Block& wire);
+
+  ///@brief Add an RepetitiveInterval @p repetitiveInterval into white list
+  Schedule&
+  addWhiteInterval(const RepetitiveInterval& repetitiveInterval);
+
+  ///@brief Add the RepetitiveInterval into black list
+  Schedule&
+  addBlackInterval(const RepetitiveInterval& repetitiveInterval);
+
+  /**
+   * @brief Get the Interval that covers the @p ts
+   *
+   * Function iterates two repetitive interval sets and find out
+   * the shortest interval that allows group member to have the access to the data
+   */
+  Interval
+  getCoveringInterval(const TimeStamp& ts) const;
+
+private:
+  std::set<RepetitiveInterval> m_whiteIntervalList;
+  std::set<RepetitiveInterval> m_blackIntervalList;
+
+  mutable Block m_wire;
+};
+
+} // namespace gep
+} // namespace ndn
+
+#endif // NDN_GROUP_ENCRYPT_SECHEDULE_HPP