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diff --git a/host/lib/usrp/usrp1/soft_time_ctrl.hpp b/host/lib/usrp/usrp1/soft_time_ctrl.hpp
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index 000000000..7fdac7fc8
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+++ b/host/lib/usrp/usrp1/soft_time_ctrl.hpp
@@ -0,0 +1,69 @@
+//
+// Copyright 2011 Ettus Research LLC
+//
+// This program 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.
+//
+// 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, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_LIBUHD_USRP_USRP1_SOFT_TIME_CTRL_HPP
+#define INCLUDED_LIBUHD_USRP_USRP1_SOFT_TIME_CTRL_HPP
+
+#include <uhd/types/stream_cmd.hpp>
+#include <uhd/types/time_spec.hpp>
+#include <uhd/types/metadata.hpp>
+#include <boost/utility.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/function.hpp>
+
+namespace uhd{ namespace usrp{
+
+/*!
+ * The soft time control emulates some of the
+ * advanced streaming capabilities of the later USRP models.
+ * Soft time control uses the system time to emulate
+ * timed transmits, timed receive commands, device time,
+ * and inline and async error messages.
+ */
+class soft_time_ctrl : boost::noncopyable{
+public:
+    typedef boost::shared_ptr<soft_time_ctrl> sptr;
+    typedef boost::function<void(bool)> cb_fcn_type;
+
+    /*!
+     * Make a new soft time control.
+     * \param stream_on_off a function to enable/disable rx
+     * \return a new soft time control object
+     */
+    static sptr make(const cb_fcn_type &stream_on_off);
+        //TODO pass in the error queue for async msgs
+        //TODO pass in the queue for inline msgs
+
+    //! Set the current time
+    virtual void set_time(const time_spec_t &time) = 0;
+
+    //! Get the current time
+    virtual time_spec_t get_time(void) = 0;
+
+    //! Call after the internal recv function
+    virtual void recv_post(rx_metadata_t &md, size_t &nsamps) = 0;
+
+    //! Call before the internal send function
+    virtual bool send_pre(const tx_metadata_t &md, double &timeout) = 0;
+
+    //! Issue a stream command to receive
+    virtual void issue_stream_cmd(const stream_cmd_t &cmd) = 0;
+};
+
+}} //namespace
+
+#endif /* INCLUDED_LIBUHD_USRP_USRP1_SOFT_TIME_CTRL_HPP */