diff --git a/device_simulator/bal_stub.h b/device_simulator/bal_stub.h
index 0bd30de..8108d6d 100644
--- a/device_simulator/bal_stub.h
+++ b/device_simulator/bal_stub.h
@@ -7,21 +7,25 @@
 #define IND_USR_DAT_VAL  "brcmOLT"
 #define BALCLIENT        "bal_client"
 #define BALSERVER        "bal_server"
+#define BAL_DEVICE_STR_LEN 20
 
 /* A linked list (LL) node to store a queue entry */
 struct QNode
 {
-   int obj_type;
-   int status;
-   struct QNode *next;
+	int obj_type;
+	char device_id[BAL_DEVICE_STR_LEN];
+	int status;
+	int intf_id;
+	int onu_id;
+	struct QNode *next;
 };
 
- 
+
 /* The queue, front stores the front node of LL and rear stores ths
-  last node of LL */
+   last node of LL */
 typedef struct Queue
 {
-   struct QNode *front, *rear;
+	struct QNode *front, *rear;
 }bal_queue;
 
 /* shared queue */
@@ -29,6 +33,6 @@
 
 void create_stub_thread(); 
 bal_queue *createQueue();
-struct QNode* newNode(int objKey, int status);
-void enQueue(int objKey, int status);
+struct QNode* newNode(int objKey, int status, char *device_id);
+void enQueue(int objKey, struct QNode *temp);
 struct QNode *deQueue();