diff --git a/ttcn/DENM/LibItsDenm_Functions.ttcn b/ttcn/DENM/LibItsDenm_Functions.ttcn
index 7f8d5cab096516ba2aac01bf972b7279f0092ca6..fd4f9ec5153142fc31526806f40b824c37fb0a17 100644
--- a/ttcn/DENM/LibItsDenm_Functions.ttcn
+++ b/ttcn/DENM/LibItsDenm_Functions.ttcn
@@ -221,6 +221,26 @@ module LibItsDenm_Functions {
             
             //TODO raise action or send message via port
             
+            return v_ret;
+        }
+
+		/**
+         * @desc Triggers event with expiration time information field and frequency information field 
+         * 		  included from the application layer
+         * @param p_event The event cause and subcause.
+         * @param p_expirationTime The expiration time.
+         * @param p_frequency The frequency.
+         * @return 
+         */        
+        function f_triggerEventExpirationTimeFrequency(
+            template (value) Situation p_event, 
+            template (value) TimeStamp p_expirationTime,
+            template (value) DecentralizedSituationManagement.frequency p_frequency
+            ) runs on ItsFa return FncRetCode {
+            var FncRetCode v_ret := e_success;
+            
+            //TODO raise action or send message via port
+            
             return v_ret;
         }
 
diff --git a/ttcn/DENM/LibItsDenm_TypesAndValues.ttcn b/ttcn/DENM/LibItsDenm_TypesAndValues.ttcn
index bf3284011e8adb9343997db20824b57259aacd20..c72ec0701c0448c45903ae4f1e9095ef361da0ab 100644
--- a/ttcn/DENM/LibItsDenm_TypesAndValues.ttcn
+++ b/ttcn/DENM/LibItsDenm_TypesAndValues.ttcn
@@ -107,6 +107,9 @@ module LibItsDenm_TypesAndValues {
         
         // in milliseconds
         const TimeStamp c_duration20s := 20000;
+        const TimeStamp c_duration40s := 40000;
+        
+        const float c_eventFrequencyMultiplier := 0.1;
         
     } // end denmTimeConstants