diff --git a/WebRTC-Sample-App/ConferenceViewController.swift b/WebRTC-Sample-App/ConferenceViewController.swift
index d192ca1..fbf4bd7 100644
--- a/WebRTC-Sample-App/ConferenceViewController.swift
+++ b/WebRTC-Sample-App/ConferenceViewController.swift
@@ -126,6 +126,7 @@ extension ConferenceViewController: AntMediaClientDelegate
     }
     
     public func dataReceivedFromDataChannel(streamId: String, data: Data, binary: Bool) {
+
         
     }
     
@@ -252,6 +253,30 @@ extension ConferenceViewController: AntMediaClientDelegate
         if eventType == EVENT_TYPE_TRACK_LIST_UPDATED {
             conferenceClient?.getBroadcastObject(forStreamId: streamId)
         }
+        else if (eventType == EVENT_TYPE_VIDEO_TRACK_ASSIGNMENT_LIST) {
+            
+            if let unwrappedPayload = payload?["payload"] as? [[String: Any]] {
+            
+                //let array = unwrappedPayload as? [[String: Any]]
+                for (item) in unwrappedPayload
+                {
+                    if let trackId = item["trackId"] as? String,
+                       let videoLabel = item["videoLabel"] as? String
+                    {
+                        
+                        print("videoLabel:\(videoLabel) plays the trackId:\(trackId)")
+                        //On the server side, we create WebRTC tracks with ARDAMSv{VIDEO_LABEL}
+                        //It's useful in limiting/dynamic allocation of the streams and tracks in a conference call
+                        //If you want to make sure, which webrtc track is playing which real streamId,
+                        //you can learn from here
+                        
+                        //i.e. you receive ARDAMSvvideoTrack0 in trackAdded method above, then you'll receive this event
+                        //and it will tell you videoTrack0 is playing the specific streamId.
+                        //If ARDAMSvvideoTrack0 starts to play another trackId, then you'll receive this event again.
+                    }
+                }
+            }
+        }
     }
 }
 
diff --git a/WebRTCiOSSDK/api/AntMediaClientProtocol.swift b/WebRTCiOSSDK/api/AntMediaClientProtocol.swift
index 5aa3dfe..285d96a 100644
--- a/WebRTCiOSSDK/api/AntMediaClientProtocol.swift
+++ b/WebRTCiOSSDK/api/AntMediaClientProtocol.swift
@@ -29,7 +29,7 @@ let GET_STREAM_INFO_COMMAND = "getStreamInfo";
 let STREAM_INFORMATION_COMMAND = "streamInformation";
 let FORCE_STREAM_QUALITY_INFO = "forceStreamQuality";
 let STREAM_HEIGHT_FIELD = "streamHeight";
-let EVENT_TYPE = "eventType";
+public let EVENT_TYPE = "eventType";
 let EVENT_TYPE_MIC_MUTED = "MIC_MUTED"
 let EVENT_TYPE_MIC_UNMUTED = "MIC_UNMUTED";
 let EVENT_TYPE_CAM_TURNED_OFF = "CAM_TURNED_OFF";
@@ -37,6 +37,7 @@ let EVENT_TYPE_CAM_TURNED_ON = "CAM_TURNED_ON";
 let GET_BROADCAST_OBJECT_COMMAND = "getBroadcastObject"
 let BROADCAST_OBJECT_NOTIFICATION = "broadcastObject"
 public let EVENT_TYPE_TRACK_LIST_UPDATED = "TRACK_LIST_UPDATED"
+public let EVENT_TYPE_VIDEO_TRACK_ASSIGNMENT_LIST = "VIDEO_TRACK_ASSIGNMENT_LIST";
 
 let ENABLE_TRACK_COMMAND = "enableTrack"
 let ENABLE_VIDEO_TRACK_COMMAND = "toggleVideo"