diff --git a/OpenAPI/TS28623_QoEMeasurementCollectionNrm.yaml b/OpenAPI/TS28623_QoEMeasurementCollectionNrm.yaml
index 27c4f7d1eab84bd70e3e6466d16a719c99ba232d..257965e40ba5de97758c8c699d20027f4067538b 100644
--- a/OpenAPI/TS28623_QoEMeasurementCollectionNrm.yaml
+++ b/OpenAPI/TS28623_QoEMeasurementCollectionNrm.yaml
@@ -60,6 +60,11 @@ components:
                       - PLAYOUTDELAYFORMEDIA_STARTUP
                   minItems: 0
                   maxItems: 2
+                mBSCommunicationServiceType:
+                  type: string
+                  enum:
+                    - BROADCAST
+                    - MULTICAST
 
 
 #-------- Definition of YAML arrays for name-contained IOCs ----------------------