diff --git a/interfaces/GenericSensor/GenericSensor.proto b/interfaces/GenericSensor/GenericSensor.proto
index a47a7fd37672a1898c055659c153bcd0575a37f8..7b62e70b5c29299d65240c814ed05063e2bdb11d 100644
--- a/interfaces/GenericSensor/GenericSensor.proto
+++ b/interfaces/GenericSensor/GenericSensor.proto
@@ -1,5 +1,17 @@
 syntax = "proto3";
 
+message SensorEventWrapper{ // mqtt-like protocols: just une kind of protobuf-message shall be sent over a topic, therefore wrapper-messages are used to encapsulate different kinds of protobuf-messages
+	repeated RFIDRawDataEvent rfidRawDataEvent = 1;
+	repeated NFCRawDataEvent nfcRawDataEvent = 2;
+	repeated BarcodeRawDataEvent barcodeRawDataEvent = 3;
+	repeated OtherProxRawDataEvent otherProxRawDataEvent = 4;
+	repeated BluetoothRawDataEvent bluetoothRawDataEvent = 5;
+	repeated UWBRawDataEvent uwbRawDataEvent = 6;
+	repeated OtherBeaconRawDataEvent otherBeaconRawDataEvent  =  7;
+	repeated IMURawDataEvent imuRawDataEvent =  8;
+	repeated SensorPositionEvent sensorPositionEvent = 9;
+}
+
 message RFIDRawDataEvent {
 	string timestamp = 1; // https://en.wikipedia.org/wiki/ISO_8601
 	string tagId = 2;
@@ -66,9 +78,11 @@ message IMURawDataEvent {
 	float z = 8;
 }
 
-message PositionEvent {
-	string timestamp = 1;
-	IposPosition position = 2;
+message SensorPositionEvent {
+  string sensorId = 1; //unique
+  IposPosition position = 2;
+  IposSimpleOrientation orientation = 3;
+  string lastPosUpdate = 4; // https://en.wikipedia.org/wiki/ISO_8601
 }
 
 message IposPosition {
@@ -82,3 +96,10 @@ message IposPoint3D {
   float y = 2; // pos in y direction in m
   float z = 3; // pos in z direction in m (up)
 }
+
+message IposSimpleOrientation {
+  float x = 1; // quaternion notation
+  float y = 2; // if the quaternion is (0,0,0,0)
+  float z = 3; // there is no orientation
+  float w = 4; // available
+}
diff --git a/interfaces/SimpleScene/SimpleScene.proto b/interfaces/SimpleScene/SimpleScene.proto
index 7414919f75f3bf8f0b07bcd0be60e11897e6266d..ee5dbb9926b620474b90a1a27357aa9995185a43 100644
--- a/interfaces/SimpleScene/SimpleScene.proto
+++ b/interfaces/SimpleScene/SimpleScene.proto
@@ -1,9 +1,11 @@
 syntax = "proto3";
 
-message IposConfig {
-    repeated IposFrame frame = 1;
+message IposConfigWrapper { // wrapper-message for configuration-topic
+    repeated IposFrameConfig frame = 1;
     repeated IposObject object = 2; // an object must be either in this list
     repeated IposObjectConfig objectConfig = 3; // or in this list, not in both
+	repeated POI poi = 4;
+	repeated RefSystem refsystem = 5;
 }
 
 message IposObjectConfig {
@@ -12,22 +14,21 @@ message IposObjectConfig {
     string agentType = 3; // CeTI will send BOX,BIN,ZONE,ROBOT,HUMAN,OTHER
 	string sensorType = 4; // BLUETOOTH, UWB, NFC, RFID, IMU...
 }
+// note: IposObjectConfigs are used to register sensors. Beacon-positions are POIs and should be sent to sensor after registration. Bluetooth/UWB sensor need to know a reference system id. All Beacon-position sent to the Bluetooth/UWB sensor should have the same reference system id
 
-message IposPositionUpdate {
-  repeated IposObject object = 1;
-}
-
-message IposExitNotification {
+message IposPositionEvent {
   repeated IposObject object = 1;
+  string type = 2; // may be ExitNotification or EntryNotification
 }
 
 message IposObject {
   string id = 1; // unique for each object, but there may be multiple sensors
   string sensorId = 2; //unique
   string type = 3; // Applications may send BOX,BIN,ZONE,ROBOT,HUMAN,OTHER
-  IposPosition position = 4;
-  IposSimpleOrientation orientation = 5;
-  string lastPosUpdate = 6; // https://en.wikipedia.org/wiki/ISO_8601
+  string sensorType = 4; // BLUETOOTH, UWB, NFC, RFID, IMU
+  IposPosition position = 5;
+  IposSimpleOrientation orientation = 6;
+  string lastPosUpdate = 7; // https://en.wikipedia.org/wiki/ISO_8601
 }
 
 message IposFrameConfig {
@@ -43,26 +44,20 @@ message RefSystem {
 
 message IposMonitoringRequest {
 	string frameId = 1;
-	float delta = 2; // min. change in position to trigger a position update
+	float delta = 2; // min. change in position to trigger a position update, setting delta and updateFrequency to -1 cancels the (existing) monitoring task
 	float updateFrequency = 3; // defines how many times per second a PositionUpdateEvent is sent
 	repeated string type = 4; // object-types to be observed; CeTI will send BOX,BIN,ZONE,ROBOT,HUMAN,OTHER
 	repeated string id = 5; // object-ids to be observed
 	string fusionStrategy = 6; // e.g., "accuracy" for accuracy-optimized monitoring if multiple positions sensors per agent
 	bool exit_notification = 7; // IPos will notify receiver when object has left the frame
 	repeated string properties = 8; // properties that shall be monitored: position or id or type
-	string requestorId = 9; // a requestor is, e.g., the OSM-App; FW requires this info to contact the requestor using a certain communication protocol. 
+	string monitoringTaskId = 9; // unique for each monitoringRequest. IPosFW uses this info for configuring the communication protocol, e.g., for selecting a specific topic for MQTT-communication; a monitoringRequest with the same monitoringTaskId like a previous request updates this request
 	string requestorProtocol = 10; // communication protocol, e.g., "mqtt"; Assumption: requestor = receiver
 }
 
 message IposMonitoringResponse {
-	string frameId = 1;
-	string monitoringTaskId = 2;
-	string error = 3;
-}
-
-message IposMonitoringUpdateRequest {
 	string monitoringTaskId = 1;
-	IposMonitoringRequest monitoringRequest = 2; // setting delta and updateFrequency to -1 cancels the monitoring task
+	string status = 2; // success- or error-Message
 }
 
 message IposPosition {
@@ -94,9 +89,4 @@ message IposSimpleOrientation {
   float y = 2; // if the quaternion is (0,0,0,0)
   float z = 3; // there is no orientation
   float w = 4; // available
-}
-
-message SensorRegistrationRequest {
-	IposObjectConfig objectConfig = 1; // depending on sensorTyp a type-specific information will be sent
-}
-// note: Beacon-positions are POIs and should be sent to sensor after registration. Bluetooth/UWB sensor need to know a reference system id. All Beacon-position sent to the Bluetooth/UWB sensor should have the same reference system id
\ No newline at end of file
+}
\ No newline at end of file