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diff --git a/CAN-binder/low-can-binding/utils/signals.cpp b/CAN-binder/low-can-binding/utils/signals.cpp
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+/*
+ * Copyright (C) 2015, 2016 "IoT.bzh"
+ * Author "Romain Forlot" <romain.forlot@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *	 http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "signals.hpp"
+
+/// 
+/// @brief Can signal event map making access to afb_event
+/// externaly to an openxc existing structure.
+///
+/// Event map is making relation between can_signal_t generic name
+/// and the afb_event struct used by application framework to pushed
+/// to the subscriber.
+///
+std::map<std::string, struct afb_event> subscribed_signals;
+
+///
+/// @brief Mutex allowing safe manipulation on subscribed_signals map.
+/// To ensure that the map object isn't modified when we read it, you
+///  have to set this mutex before use subscribed_signals map object.
+///
+std::mutex subscribed_signals_mutex;
+
+std::mutex& get_subscribed_signals_mutex()
+{
+	return subscribed_signals_mutex;
+}
+
+std::map<std::string, struct afb_event>& get_subscribed_signals()
+{
+	return subscribed_signals;
+}
+
+///
+/// @fn std::vector<std::string> find_signals(const openxc_DynamicField &key)
+/// @brief return signals name found searching through CAN_signals and OBD2 pid
+///
+/// @param[in] key : can contain numeric or string value in order to search against 
+///   can signals or obd2 signals name.
+///
+/// @return Vector of signals name found. 
+///
+std::vector<std::string> find_signals(const openxc_DynamicField &key)
+{
+	std::vector<std::string> found_signals_name;
+
+	switch(key.type)
+	{
+		case openxc_DynamicField_Type::openxc_DynamicField_Type_STRING:
+				lookup_signals_by_name(key.string_value, configuration_t::instance().get_can_signals(), found_signals_name);
+				lookup_signals_by_name(key.string_value, configuration_t::instance().get_diagnostic_messages(), found_signals_name);
+			break;
+		case openxc_DynamicField_Type::openxc_DynamicField_Type_NUM:
+				lookup_signals_by_id(key.numeric_value, configuration_t::instance().get_can_signals(), found_signals_name);
+				lookup_signals_by_id(key.numeric_value, configuration_t::instance().get_diagnostic_messages(), found_signals_name);
+			break;
+		default:
+			ERROR(binder_interface, "find_signals: wrong openxc_DynamicField specified. Use openxc_DynamicField_Type_NUM or openxc_DynamicField_Type_STRING type only.");
+			break;
+	}
+	DEBUG(binder_interface, "find_signals: Found %d signal(s)", (int)found_signals_name.size());
+	return found_signals_name;
+}