diff --git a/src/main/java/fr/ntr/scheduler/MaxSNR.java b/src/main/java/fr/ntr/scheduler/MaxSNR.java
index a76961e..d1f7e40 100644
--- a/src/main/java/fr/ntr/scheduler/MaxSNR.java
+++ b/src/main/java/fr/ntr/scheduler/MaxSNR.java
@@ -26,13 +26,12 @@ public class MaxSNR extends Scheduler {
 				if (userMax.getPacketsToSend().size() != 0) {
 					Packets p = userMax.getPacketsToSend().get(0);
 					userMax.getPacketsSent().add(p);
-					if(p.getDurationSending() != 0){
-                        if(p.getBitsNumberRemaining() > 0){
-                            p.decreaseBitsNumberRemaining((int) userMax.getBandwidthTable()[ts][sp]);
-                        } else {
-                            p.setDurationSending(ticks);
-                        }
-                    }
+					if(p.getBitsNumberRemaining() > 0){
+						p.decreaseBitsNumberRemaining((int) userMax.getBandwidthTable()[ts][sp]);
+					} else {
+						p.setDurationSending(ticks);
+					}
+
 					userMax.getPacketsToSend().remove(p);
 					frame[ts][sp].setUser(userMax);
 					frame[ts][sp].setBandwidth(userMax.getBandwidthTable()[ts][sp]);
diff --git a/src/main/java/fr/ntr/scheduler/ProportionalFair.java b/src/main/java/fr/ntr/scheduler/ProportionalFair.java
index 7ce759e..e7cd1fe 100644
--- a/src/main/java/fr/ntr/scheduler/ProportionalFair.java
+++ b/src/main/java/fr/ntr/scheduler/ProportionalFair.java
@@ -7,6 +7,8 @@ import fr.ntr.ResourceBlock;
 import fr.ntr.User;
 
 public class ProportionalFair extends Scheduler {
+
+
 	private List<User> users;
 
 	private ResourceBlock[][] frame;
@@ -17,7 +19,7 @@ public class ProportionalFair extends Scheduler {
 	} 
 	
 	@Override
-	public void scheduling() {
+	public void scheduling(int ticks) {
 		ArrayList<Double> averageBandwiths = new ArrayList<Double>();
 		for(User u : users){
 			double avg = 0d;
diff --git a/src/main/java/fr/ntr/scheduler/RoundRobin.java b/src/main/java/fr/ntr/scheduler/RoundRobin.java
index db4a3e5..6ba2cb8 100644
--- a/src/main/java/fr/ntr/scheduler/RoundRobin.java
+++ b/src/main/java/fr/ntr/scheduler/RoundRobin.java
@@ -28,7 +28,7 @@ public class RoundRobin extends Scheduler {
 	 * Return
 	 */
 	@Override
-	public void scheduling() {
+	public void scheduling(int ticks) {
 		//selection aleatoire du premier utilisateur
 		Random random = new Random();
 		index =  random.nextInt(users.size());